Palo Alto, CA

5:41 PM PST on February 13, 2012 (GMT -0800)
Elev: 36 ft
Lon: 122.1° W
Lat: 37.4° N
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4.3 Earthquake: Anderson Springs, CA (20 hours ago)
Tropical Weather: Tropical Cyclone Giovanna (South Indian Ocean) Tropical Cyclone Jasmine (Southern Pacific)
Weather Summary
Weather Underground midday recap for Monday, February 13, 2012. A storm raced out of the Rockies and into the Plains on Monday, producing a good shot of Winter weather in the Plains and Mississippi Valley. Winter Weather Advisories were posted from eastern Oklahoma through the western Tennessee Valley in anticipation of several inches of new snow. Snow fell as far north as Minnesota and Michigan, but lighter snow was reported the farther north you went. In the warmer air closer to the Gulf Coast, rain fell in Louisiana and Mississippi.

Wet weather also greeted the West Coast as a Pacific storm slammed into California. This storm lacked a tremendous amount of moisture, but it has been a very dry Winter for the state thus far, and any precipitation is very much welcomed. Up to a foot of new snow is possible from this storm in the higher elevations of the Sierra Nevadas when all is said and done.

The East Coast was dry as a high pressure continued to dominate, but the region experienced another chilly day. By the afternoon, temperatures were still in the 20s and 30s for many areas in New England, while temperatures in the 30s were experience as far south as Arkansas. Morning temperatures were in the 20s in northern Florida.

The Northern Plains rose into the 20s and 30s, while the Northwest saw temperatures in the 30s and 40s. The Southwest rose into the 40s, 50s, and some 60s.
Weather Underground midday recap for Monday, February 13, 2012. A storm raced out of the Rockies and into the Plains on Monday, producing a good shot of Winter weather in the Plains and Mississippi Valley. Winter Weather Advisories were posted from eastern Oklahoma through the western Tennessee Valley in anticipation of several inches of new snow. Snow fell as far north as Minnesota and Michigan, but lighter snow was reported the farther north you went. In the warmer air closer to the Gulf Coast, rain fell in Louisiana and Mississippi.

Wet weather also greeted the West Coast as a Pacific storm slammed into California. This storm lacked a tremendous amount of moisture, but it has been a very dry Winter for the state thus far, and any precipitation is very much welcomed. Up to a foot of new snow is possible from this storm in the higher elevations of the Sierra Nevadas when all is said and done.

The East Coast was dry as a high pressure continued to dominate, but the region experienced another chilly day. By the afternoon, temperatures were still in the 20s and 30s for many areas in New England, while temperatures in the 30s were experience as far south as Arkansas. Morning temperatures were in the 20s in northern Florida.

The Northern Plains rose into the 20s and 30s, while the Northwest saw temperatures in the 30s and 40s. The Southwest rose into the 40s, 50s, and some 60s.
Palo Alto Weather at a Glance
Updated 5:41 PM PST
Elevation
57 ft
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Now
Mostly Cloudy
Mostly Cloudy
Temperature
49.1 °F
Feels Like 49 °F
Wind(mph)
0.5
Sunrise / Set
7:00 AM
5:45 PM
Moon
Waning Gibbous
Tonight
Mostly Cloudy 41 °F
Mostly Cloudy
Tomorrow
Chance of Rain 59 °F
Chance of Rain
20% chance of precipitation
Tomorrow Night
Chance of Rain 41 °F
Chance of Rain
20% chance of precipitation
Wednesday
Partly Cloudy 61 | 39 °F
Partly Cloudy
Thursday
Partly Cloudy 63 | 39 °F
Partly Cloudy
Friday
Partly Cloudy 66 | 41 °F
Partly Cloudy
Tomorrow is forecast to be nearly the same temperature as today.
Conditions
Pressure
29.97 in
Visibility
15.0 miles
Clouds
Mostly Cloudy 4000 ft
Mostly Cloudy 7000 ft
Moisture
Humidity
89%
Rainfall
0.27 in
Snow Depth
Not available.
METAR
METAR KPAO 140047Z 30113KT 15SM VCSH BKN040 BKN070 11/08 A2996
Don't speak METAR? Read our FAQ.
Weather Radio
Temperature
Windchill
49 °F
Dew Point
46 °F
Wind
Speed / Dir
Calm
Wind Gust
1.3 mph
Health
UV
0 out of 16
Pollen
3.90 out of 12
Pollen Forecast
PM2.5
Good
Flu Activity
Widespread
View Flu Map
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Source: BestForecast
Descriptive Forecast
Monday
rain Mostly cloudy with rain showers. High of 59°F. Winds from the West at 10-15 mph. Chance of rain 60%.
Monday Night
nt_mostlycloudy Mostly cloudy in the evening, then partly cloudy. Low of 41°F. Winds from the SW at 5-20 mph.
Tuesday
chancerain Partly cloudy with a chance of rain in the afternoon. High of 59°F. Winds from the SW at 5-10 mph. Chance of rain 20%.
Tuesday Night
nt_chancerain Partly cloudy with a chance of rain. Low of 41°F. Winds from the SW at 5-10 mph. Chance of rain 20%.
Wednesday
partlycloudy Partly cloudy with a chance of rain. High of 61°F. Winds from the South at 5-10 mph.
Wednesday Night
nt_clear Clear. Low of 39°F. Winds from the NNW at 5-10 mph.
Thursday
partlycloudy Partly cloudy. High of 63°F. Winds from the North at 5-10 mph.
Thursday Night
nt_clear Clear. Low of 39°F. Winds less than 5 mph.
Friday
partlycloudy Overcast in the morning, then partly cloudy. High of 66°F. Winds from the NNW at 5-10 mph.
Friday Night
nt_cloudy Overcast. Fog overnight. Low of 41°F. Winds less than 5 mph.
Saturday
partlycloudy Partly cloudy. High of 63°F. Winds from the NW at 5-15 mph.
Saturday Night
nt_mostlycloudy Partly cloudy. Low of 41°F. Winds from the NW at 5-10 mph.
Sunday
partlycloudy Partly cloudy. High of 63°F. Winds less than 5 mph.
Sunday Night
nt_cloudy Overcast. Fog overnight. Low of 39°F. Winds from the West at 5-10 mph.
Monday
mostlycloudy Overcast. High of 61°F. Winds less than 5 mph.
Monday Night
nt_partlycloudy Partly cloudy. Low of 43°F. Winds from the West at 5-10 mph shifting to the NNW after midnight.
Tuesday
partlycloudy Partly cloudy. High of 66°F. Winds from the NNW at 5-10 mph.
Tuesday Night
nt_partlycloudy Partly cloudy. Low of 45°F. Winds from the NNW at 5-10 mph.
Wednesday
clear Partly cloudy. High of 70°F. Winds from the NNW at 5-15 mph.
Wednesday Night
nt_clear Partly cloudy. Low of 46°F. Winds from the NNW at 5-15 mph.
Thursday
partlycloudy Partly cloudy. High of 68°F. Winds from the NNW at 5-15 mph.
Thursday Night
nt_partlycloudy Partly cloudy. Low of 43°F. Winds from the NNW at 5-15 mph.
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Forecast
View Calendar 7-Day Weather Forecast for station KCAPALOA15
Monday, 13
Rain Showers
59 | 41 °F
Rain Showers
Chance of
Precipitation
60%
Tuesday, 14
Chance of Rain
59 | 41 °F
Chance of Rain
Chance of
Precipitation
20%
Wednesday, 15
Partly Cloudy
61 | 39 °F
Partly Cloudy
Chance of
Precipitation
10%
Thursday, 16
Partly Cloudy
63 | 39 °F
Partly Cloudy
Chance of
Precipitation
0%
Friday, 17
Partly Cloudy
66 | 41 °F
Partly Cloudy
Chance of
Precipitation
0%
Saturday, 18
Partly Cloudy
63 | 41 °F
Partly Cloudy
Chance of
Precipitation
0%
Sunday, 19
Partly Cloudy
63 | 39 °F
Partly Cloudy
Chance of
Precipitation
0%
Monday, 20
Mostly Cloudy
61 | 43 °F
Mostly Cloudy
Chance of
Precipitation
0%
Source: BestForecast
Descriptive Forecast
Monday
rain Mostly cloudy with rain showers. High of 59°F. Winds from the West at 10-15 mph. Chance of rain 60%.
Monday Night
nt_mostlycloudy Mostly cloudy in the evening, then partly cloudy. Low of 41°F. Winds from the SW at 5-20 mph.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 47 | 45 55 | 39 51 | 38 44 | 42
Wind 13 mph NW 11 mph West 14 mph West 4 mph SSE
Humidity 93% 57% 62% 91%
Chance of Precip. 90% 60% 60% 20%
Cloud Cover 78% 76% 81% 69%
Conditions Rain Showers Rain Showers Mostly Cloudy Mostly Cloudy
Sunrise & Sunset
7:00 AM
5:45 PM
Source: BestForecast
Descriptive Forecast
Tuesday
chancerain Partly cloudy with a chance of rain in the afternoon. High of 59°F. Winds from the SW at 5-10 mph. Chance of rain 20%.
Tuesday Night
nt_chancerain Partly cloudy with a chance of rain. Low of 41°F. Winds from the SW at 5-10 mph. Chance of rain 20%.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 42 | 37 57 | 42 52 | 37 45 | 42
Wind 4 mph SW 7 mph SSW 6 mph SW 4 mph West
Humidity 85% 56% 57% 90%
Chance of Precip. 10% 10% 20% 20%
Cloud Cover 68% 32% 27% 27%
Conditions Mostly Cloudy Partly Cloudy Chance of Rain Chance of Rain
Sunrise & Sunset
6:59 AM
5:46 PM
Source: BestForecast
Descriptive Forecast
Wednesday
partlycloudy Partly cloudy with a chance of rain. High of 61°F. Winds from the South at 5-10 mph.
Wednesday Night
nt_clear Clear. Low of 39°F. Winds from the NNW at 5-10 mph.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 42 | 39 56 | 30 53 | 32 44 | 37
Wind 1 mph SSW 5 mph South 7 mph SE 4 mph NNW
Humidity 86% 38% 47% 77%
Chance of Precip. 20% 20% 10% 0%
Cloud Cover 48% 68% 40% 0%
Conditions Chance of Rain Chance of Rain Partly Cloudy Clear
Sunrise & Sunset
6:58 AM
5:47 PM
Source: BestForecast
Descriptive Forecast
Thursday
partlycloudy Partly cloudy. High of 63°F. Winds from the North at 5-10 mph.
Thursday Night
nt_clear Clear. Low of 39°F. Winds less than 5 mph.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 42 | 36 60 | 37 55 | 40 42 | 37
Wind 4 mph NE 4 mph ESE 5 mph NNW 2 mph SSE
Humidity 81% 43% 63% 81%
Chance of Precip. 0% 0% 0% 0%
Cloud Cover 0% 60% 2% 0%
Conditions Clear Partly Cloudy Clear Clear
Sunrise & Sunset
6:57 AM
5:48 PM
Source: BestForecast
Descriptive Forecast
Friday
partlycloudy Overcast in the morning, then partly cloudy. High of 66°F. Winds from the NNW at 5-10 mph.
Friday Night
nt_cloudy Overcast. Fog overnight. Low of 41°F. Winds less than 5 mph.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 44 | 41 61 | 44 58 | 49 43 | 42
Wind 2 mph East 3 mph NNE 4 mph NW 3 mph NNE
Humidity 86% 55% 75% 96%
Chance of Precip. 0% 0% 0% 0%
Cloud Cover 0% 100% 33% 96%
Conditions Clear Overcast Partly Cloudy Fog
Sunrise & Sunset
6:55 AM
5:49 PM
Source: BestForecast
Descriptive Forecast
Saturday
partlycloudy Partly cloudy. High of 63°F. Winds from the NW at 5-15 mph.
Saturday Night
nt_mostlycloudy Partly cloudy. Low of 41°F. Winds from the NW at 5-10 mph.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 45 | 45 60 | 51 51 | 43 44 | 42
Wind 3 mph WNW 10 mph NNW 9 mph NNW 5 mph NW
Humidity 95% 72% 72% 96%
Chance of Precip. 0% 0% 10% 0%
Cloud Cover 98% 99% 35% 100%
Conditions Fog Overcast Partly Cloudy Overcast
Sunrise & Sunset
6:55 AM
5:49 PM
Source: BestForecast
Descriptive Forecast
Sunday
partlycloudy Partly cloudy. High of 63°F. Winds less than 5 mph.
Sunday Night
nt_cloudy Overcast. Fog overnight. Low of 39°F. Winds from the West at 5-10 mph.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 42 | 41 57 | 45 55 | 44 44 | 42
Wind 3 mph NW 5 mph NW 6 mph WNW 4 mph West
Humidity 95% 61% 69% 92%
Chance of Precip. 10% 10% 10% 0%
Cloud Cover 66% 33% 77% 100%
Conditions Mostly Cloudy Partly Cloudy Mostly Cloudy Fog
Sunrise & Sunset
6:55 AM
5:49 PM
Source: BestForecast
Descriptive Forecast
Monday
mostlycloudy Overcast. High of 61°F. Winds less than 5 mph.
Monday Night
nt_partlycloudy Partly cloudy. Low of 43°F. Winds from the West at 5-10 mph shifting to the NNW after midnight.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 40 | 38 58 | 42 56 | 49 44 | 42
Wind 4 mph SW 4 mph WNW 5 mph WNW 6 mph West
Humidity 91% 54% 77% 94%
Chance of Precip. 0% 0% 0% 0%
Cloud Cover 99% 76% 100% 46%
Conditions Fog Mostly Cloudy Overcast Partly Cloudy
Sunrise & Sunset
6:55 AM
5:49 PM
Source: BestForecast
Descriptive Forecast
Tuesday
partlycloudy Partly cloudy. High of 66°F. Winds from the NNW at 5-10 mph.
Tuesday Night
nt_partlycloudy Partly cloudy. Low of 45°F. Winds from the NNW at 5-10 mph.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 48 | 48 61 | 49 59 | 45 49 | 43
Wind 7 mph NNW 7 mph NNW 9 mph NNW 7 mph NNW
Humidity 98% 64% 61% 80%
Chance of Precip. 0% 0% 0% 0%
Cloud Cover 64% 48% 30% 28%
Conditions Mostly Cloudy Partly Cloudy Partly Cloudy Partly Cloudy
Sunrise & Sunset
6:55 AM
5:49 PM
Source: BestForecast
Descriptive Forecast
Wednesday
clear Partly cloudy. High of 70°F. Winds from the NNW at 5-15 mph.
Wednesday Night
nt_clear Partly cloudy. Low of 46°F. Winds from the NNW at 5-15 mph.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 50 | 42 63 | 52 60 | 46 49 | 36
Wind 7 mph NNW 8 mph NNW 10 mph NW 8 mph NW
Humidity 77% 64% 57% 60%
Chance of Precip. 0% 0% 0% 0%
Cloud Cover 26% 18% 11% 18%
Conditions Partly Cloudy Clear Clear Clear
Sunrise & Sunset
6:55 AM
5:49 PM
Source: BestForecast
Descriptive Forecast
Thursday
partlycloudy Partly cloudy. High of 68°F. Winds from the NNW at 5-15 mph.
Thursday Night
nt_partlycloudy Partly cloudy. Low of 43°F. Winds from the NNW at 5-15 mph.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 50 | 35 63 | 41 60 | 32 48 | 25
Wind 8 mph NNW 9 mph NNW 11 mph NW 8 mph NNW
Humidity 57% 43% 35% 39%
Chance of Precip. 0% 0% 0% 0%
Cloud Cover 25% 33% 41% 25%
Conditions Clear Partly Cloudy Partly Cloudy Clear
Sunrise & Sunset
6:55 AM
5:49 PM
Source: BestForecast
Descriptive Forecast
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 48 | 26 61 | 35 60 | 32 -9998 | -9998
Wind 7 mph NNW 9 mph NNW 11 mph NW -9998 mph North
Humidity 41% 37% 35% 39%
Chance of Precip. 0% 0% 0% 0%
Cloud Cover 8% % 41% %
Conditions Clear Clear Partly Cloudy Clear
Sunrise & Sunset
6:55 AM
5:49 PM
BestForecast (what's this?)
Nearby
History & Almanac
February 13, 2012 Max Temp Min Temp
Normal (KNUQ) 61 °F 45 °F
Record (KNUQ) 73 °F (1991) 28 °F (1948)
Yesterday 62 °F 43 °F
Yesterday's Heating Degree Days: 12
Choose a date
Earthquake Activity
City Distance Mag. Time & Date
Anderson Springs, CA 98 miles 2.5 8:55 PM PST
2012-02-12
Anderson Springs, CA 98 miles 4.3 8:47 PM PST
2012-02-12
Templeton, CA 150 miles 2.7 9:44 AM PST
2012-02-12
Willits, CA 152 miles 2.6 1:37 PM PST
2012-02-11
Minimum magnitude displayed is 2.5.
Air Quality
  Air Quality AQ Index Pollutant
Yesterday Good
OZONE
Yesterday Good
PM2.5
Current Good
PM2.5
Monday Good
OZONE
Tuesday Good
OZONE
Wednesday Good
PM2.5
Thursday Good
PM2.5
Friday Good
PM2.5
Coastal Water Temperatures
Place Temperature
San Francisco, CA 52.0 °F
Richmond, CA 53.1 °F
Port Chicago, CA 52.0 °F
Astronomy
Feb. 13, 2012 Rise Set
Actual Time 7:00 AM PST 5:45 PM PST
Civil Twilight 6:33 AM PST 6:12 PM PST
Nautical Twilight 6:03 AM PST 6:43 PM PST
Astronomical Twilight 5:32 AM PST 7:13 PM PST
Moon No Moon Rise 10:12 AM PST (2/13)
Length Of Visible Light 11h 38m
Length of Day
10h 45m
Tomorrow will be 2m 13s longer.
Waning Gibbous, 57% of the Moon is Illuminated
Today
Waning Gibbous
Feb 14
Last Quarter
Feb 21
New
Feb 29
First Quarter
Mar 8
Full
Today's Extremes
State Highs State Lows
72 °F
Thermal
71 °F
Palm Springs
70 °F
El Centro
69 °F
Imperial
68 °F
Blythe
23 °F
Truckee-Tahoe
25 °F
Bishop
26 °F
Blue Canyon
28 °F
Alturas
Source: NWS
Snow Depth
Station Depth Elevation
Carson Pass 26 in 8500 ft
Forestdale Creek 29 in 8029 ft
Echo Peak 23 in 7800 ft
Ebbetts Pass 30 in 8700 ft
Leavitt Lake 45 in 9400 ft
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Travel & Activities
Travel Planning
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Nearby Events
Event Date Forecast
Prenatal Yoga 10:00 PM PST 2012-02-13 Mostly Cloudy, 39°F
Japanese Pregnancy Support Group 11:00 PM PST 2012-02-13 Mostly Cloudy, 38°F
The 7 Lively Virtues 11:00 AM PST 2012-02-14 Clear, 52°F
Pub Quiz 7:00 PM PST 2012-02-14 Chance of Rain, 50°F
Valentine's Day with Johnny Steele 8:00 PM PST 2012-02-14 Chance of Rain, 48°F
Cinderella 9:00 AM PST 2012-02-14 Mostly Cloudy, 46°F
Event data courtesy eviesays.com
Aviation
City Temp. Conditions Updated
Palo Alto 52 °F Mostly Cloudy 4:47 PM PST
Moffett NAS 50 °F Light Rain 5:26 PM PST
San Carlos 50 °F Light Rain 4:48 PM PST
San Jose 49 °F Light Rain 4:53 PM PST
Flight To ETA Status
FDX2642
Oakland, CA
KSJC 05:24PM On Time
ASA328
Seattle, WA
KSJC 05:35PM On Time
SWA1639
San Diego, CA
KSJC 05:40PM On Time
SWA515
Phoenix, AZ
KSJC 05:49PM On Time
Flight Tracker by FlightAware FlightAware
Type Condition
Flight Rule: VFR (KPAO)
Wind Speed: 13.0 kts.
Wind Dir: 81° (East)
Ceiling: 4000 ft

METAR KPAO 140047Z 30113KT 15SM VCSH BKN040 BKN070 11/08 A2996

Sports
Event Date Forecast
Budweiser Shootout 8:29 PM EST on February 18, 2012 Chance of Rain, 65 °F
Gatorade Duel 1 2:19 PM EST on February 23, 2012 Average High 70° F/ 21° C
Event Date Forecast
Northern Trust Open 8:30 AM PST on February 16, 2012 Clear, 47 °F
Northern Trust Open 8:30 AM PST on February 17, 2012 Clear, 65 °F
Weather Stations
Station Location Temp. Windchill Dew Point Humidity Wind Precipitation Elevation Updated Type Website
Old Palo Alto (Waverley St), Palo Alto, CA 49.1 °F 49 °F 46 °F 89% East  at  0.5 mph 0.00 in / hr 57 ft 5:41 PM PST Rapid Fire
Evergreen Park, Palo Alto, CA 50.0 °F - 46 °F 85% North  at  0.0 mph 0.00 in / hr 35 ft 5:39 PM PST Normal  
College Terrace, Palo Alto, CA 49.1 °F 49 °F 45 °F 86% West  at  0.0 mph 0.00 in / hr 43 ft 5:41 PM PST Normal  
Palo Alto (Midtown), Palo Alto, CA 49.2 °F 49 °F 45 °F 86% WNW  at  0.0 mph 0.01 in / hr 15 ft 5:41 PM PST Rapid Fire  
Allied Arts, Menlo Park, CA 48.7 °F 49 °F 44 °F 85% WSW  at  1.0 mph 0.00 in / hr 70 ft 5:41 PM PST Rapid Fire  
Midtown, Palo Alto, CA 50.5 °F - 44 °F 78% WNW  at  0.0 mph - / hr 7 ft 5:41 PM PST Rapid Fire  
APRSWXNET Menlo Park CA , Menlo Park, CA 51 °F - 45 °F 80% WNW  at  0 mph 0.00 in / hr 78 ft 5:19 PM PST MADIS
Barron Park, Palo Alto, CA 50.2 °F - 44 °F 81% North  at  0.0 mph 0.02 in / hr 40 ft 5:41 PM PST Rapid Fire  
Palo Verde, Palo Alto, CA 48.7 °F 49 °F 46 °F 92% NNW  at  0.0 mph 0.00 in / hr 12 ft 3:41 PM WSDT Rapid Fire  
APRSWXNET Atherton CA , Atherton, CA 49 °F 49 °F 47 °F 92% West  at  1 mph 0.00 in / hr 49 ft 5:16 PM PST MADIS
Walnut Grove, Palo Alto, CA 49.6 °F 50 °F 47 °F 92% NE  at  0.0 mph 0.01 in / hr 36 ft 5:40 PM PST Normal  
Atherton, CA 48.9 °F 49 °F 45 °F 87% SSE  at  0.0 mph 0.00 in / hr 53 ft 5:39 PM PST Normal  
APRSWXNET W.Menlo Park CA, Menlo Park, CA 51 °F - 47 °F 87% NW  at  3 mph 0.05 in / hr 115 ft 5:00 PM PST MADIS
MLoma, Mountain View, CA 50.7 °F - 46 °F 85% ENE  at  1.3 mph 0.00 in / hr 30 ft 5:40 PM PST Rapid Fire  
SLAC's Campus, Menlo Park, CA 52.3 °F - 50 °F 92% NW  at  5.8 mph 0.00 in / hr 0 ft 5:41 PM PST Rapid Fire  
Beresford Ave, Redwood City, CA 51.1 °F - 44 °F 79% WNW  at  0.0 mph 0.04 in / hr 66 ft 5:39 PM PST Normal
Los Altos Hills, CA 49.3 °F 49 °F 49 °F 100% West  at  0.9 mph 0.00 in / hr 96 ft 5:40 PM PST Normal  
Los Altos High School, Los Altos, CA 48.8 °F 49 °F 44 °F 84% NW  at  1.0 mph 0.00 in / hr 140 ft 5:40 PM PST Normal  
Mountain View, Mountain View, CA 50.7 °F - 45 °F 81% WNW  at  0.0 mph 0.02 in / hr 10 ft 5:40 PM PST Normal  
Los Altos, CA 50.4 °F - 46 °F 85% North  at  - 0.00 in / hr 140 ft 5:40 PM PST Normal  
Mountain Shadows, Mountain View, CA 51.9 °F - 44 °F 74% NW  at  0.0 mph 0.00 in / hr 50 ft 5:40 PM PST Normal  
WESTWIND VINEYARDS, LOS ALTOS HILLS, CA 47.5 °F 48 °F 47 °F 99% South  at  0.7 mph 0.02 in / hr 348 ft 5:38 PM PST Rapid Fire  
Alpine Hills, Portola Valley, CA 47.5 °F 48 °F 46 °F 95% NW  at  0.7 mph 0.05 in / hr 690 ft 5:38 PM PST Normal  
Portola Valley, Portola Valley, CA 48.1 °F 45 °F - - WNW  at  6.8 mph 0.00 in / hr 764 ft 5:40 PM PST Normal  
Mountain View, CA 50.2 °F - - - North  at  - - / hr 50 ft 5:39 PM PST Normal  
Central Portola Valley, Portola Valley, CA 46.1 °F 46 °F 45 °F 96% NW  at  2.0 mph 0.04 in / hr 660 ft 5:39 PM PST Normal
APRSWXNET Los Altos Hills CA , Los Altos, CA 46 °F 46 °F 43 °F 90% NNW  at  2 mph 0.04 in / hr 62 ft 5:13 PM PST MADIS
Los Altos, CA 48.0 °F 33 °F 46 °F 92% NNW  at  114.0 mph 0.00 in / hr 100 ft 5:40 PM PST Normal  
Sterling Heights, Redwood City, CA 48.5 °F 46 °F 8 °F 19% North  at  5.0 mph 0.00 in / hr 134 ft 5:41 PM PST Rapid Fire  
Stulsaft Park, Redwood City, CA 49.7 °F 50 °F 46 °F 89% North  at  0.0 mph 0.06 in / hr 233 ft 5:41 PM PST Rapid Fire  
Woodside, Woodside, CA 47.5 °F 48 °F 45 °F 92% WSW  at  2.0 mph 0.00 in / hr 375 ft 5:40 PM PST Normal  
Woodside Glens, Woodside, CA 48.3 °F 48 °F 47 °F 95% NW  at  1.0 mph 0.05 in / hr 381 ft 5:40 PM PST Normal  
Redwood City Hills, Redwood City, CA 50.2 °F - 46 °F 86% WNW  at  5.6 mph 0.04 in / hr 170 ft 5:41 PM PST Normal  
Cuesta Park, Mountain View, Mountain View, CA 51.1 °F - 45 °F 82% South  at  0.0 mph 0.00 in / hr 104 ft 5:41 PM PST Rapid Fire  
Canyon Rd. Redwood City, CA, Redwood City, CA 50.0 °F - 50 °F 98% South  at  2.0 mph - / hr 0 ft 5:33 PM PST Normal  
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Public Information Statement
Mobile & Email Alerts Statement as of 2:25 PM PST on February 13, 2012

... January 2012 regional climate summary...

Summary for the San Francisco Bay area and Monterey Bay area...

Except for a five day period of wet weather from January 19 to
January 23... the weather across the San Francisco Bay area and
Monterey Bay area during January 2012 was very much like that of
December 2011. Most January days were sunny... dry and warm... and
most nights were clear and cool.

2012 got off to a warm start. Three daily high temperature records
were set on January 1st. A brief cool-down on the 2nd and 3rd was
followed by an extended warm and dry period from the 4th through
the 14th. Daytime temperatures were above normal on ten of these
eleven days and several daily high temperature records were set or
tied on the 4th... 5th and 7th. The upper ridge that produced
record warmth during the first several days of January... and dry
weather for the first half of the month... weakened by the middle
of the month. This allowed a cold upper trough along the British
Columbia coast to drop south into California on the 15th and 16th.
This upper trough was dry... but the airmass it ushered into our
area was sufficiently cold to produce widespread freezing
temperatures across our region from the 16th through the 18th.
Record low temperature records were set or tied on the mornings of
the 17th and 18th. The coldest temperatures of the month for most
of the area occurred early on the morning of Tuesday the 17th. The
low temperature at the Napa Airport that morning was 19... while
most other inland valley locations recorded low temperatures in
the lower to mid 20s. Upper 20s and lower 30s were common
elsewhere during the early morning hours of the 17th.

When the upper ridge weakened around the middle of the month... moist
flow across the Pacific was finally able to break through to the
West Coast. Rain began to fall on the 19th and then became locally
heavy on Friday the 20th... continuing into Friday night. Rain
totals from Thursday January 19 through Saturday January 21
ranged from 2.5 to 5.75 inches in the North Bay... and from 1 to 3
inches across most of the rest of the region except as little as
0.25 inches in the interior valleys and as much as 7 inches in the
Santa Cruz and Santa Lucia mountains. A second system dropped
more rain from late Sunday into Monday the 23rd. The second system
produced strong and gusty southerly winds on Sunday night and
early Monday when widespread wind gusts of between 40 and 50 mph
were recorded... along with local gusts up to 60 mph. Rain totals
with the second system were not quite as impressive as with the
first but still significant... especially in the coastal mountain
ranges where as much as four more inches of rain fell on the 22nd
and 23rd.

All of january's rainfall occurred during the 5 day period from
the 19th to the 23rd. The North Bay benefited most from this brief
respite from the prolonged dry period. January rainfall totals at
North Bay climate stations were close to normal... or even slightly
above normal. Elsewhere... rain totals for January ranged anywhere
from about 40% to 70% of normal. Year-t0-date rainfall totals
jumped significantly by the 23rd... but still lagged well behind
normal. Below is a listing of year-to-date rain totals prior to
January 19 and then again on January 23.

                      Year-to-date year-to-date
                      totals on totals on
                      January 18: January 23:
location inches/pon inches/pon

Santa Rosa Airport 4.46/23% 11.43/58%
San Francisco 3.37/29% 6.05/49%
sfo Airport 2.87/28% 5.03/47%
Oakland Airport 3.07/29% 5.24/48%
Moffett field 1.77/26% 2.80/39%
San Jose Airport 1.55/22% 2.45/33%
Salinas Airport 3.31/59% 4.91/82%

Temperatures during the wet period from the 19th to the 23rd were
opposite of what they were during most of the rest of January.
Daytime highs were cool... mostly in the 50s... while nights were
relatively mild due to considerable cloud cover.

The typical dry weather pattern of the current winter season
returned by January 25. For the remainder of the month our
region experienced dry and mild weather conditions as a ridge of
high pressure once again persisted along the West Coast.

Average high temperatures for the month were above normal at all
climate stations... generally from 2 to 5 degrees warmer than
normal. Low temperatures were below normal at most climate station
locations. The exceptions were a few locations near the immediate
coast and at higher elevation where average lows were above normal.


           ... January regional temperature summary...

                                departure departure
                   avg normal from avg normal from
location high high normal low low normal

North Bay...

Calistoga 62.7 59.5 3.2 30.5 37.3 -6.8
Healdsburg 60.1 57.6 2.5 36.0 39.6 -3.6
Kentfield 59.5 55.0 4.5 40.5 41.3 -0.8
Napa 61.8 57.3 4.5 36.9 39.4 -2.5
Napa Airport 61.1 55.1 6.0 32.7 37.0 -4.3
Petaluma Airport 60.9 56.9 4.0 35.2 39.2 -4.0
Saint Helena 62.8 57.8 5.0 37.6 38.6 -1.0
Santa Rosa 63.3 59.0 4.3 35.2 39.2 -4.0
Santa Rosa ap 61.9 56.7 5.2 33.5 36.6 -3.1
Sonoma 60.2 56.3 3.9 35.7 37.8 -2.1

San Francisco peninsula...

Half Moon Bay 61.0 59.0 2.0 41.1 41.5 -0.4
Redwood City 61.4 58.0 3.4 37.9 40.4 -2.5
San Francisco
Airport 58.1 56.3 1.8 43.0 44.2 -1.2
San Francisco
downtown 59.3 56.9 2.4 46.5 45.7 0.8
Woodside 64.6 60.5 4.1 32.8 37.0 -4.2

East Bay...

Berkeley 61.6 58.4 3.2 43.0 42.0 1.0
Concord Airport 60.9 55.9 5.0 37.0 39.7 -2.7
Fremont 60.7 58.1 2.6 39.9 42.2 -2.3
Hayward Airport 59.2 57.2 2.0 41.0 42.5 -1.5
Livermore ap 61.7 56.0 5.7 36.4 37.4 -1.0
Martinez 59.8 55.2 4.6 32.7 35.6 -2.9
Mount Diablo
Junction 57.6 55.5 2.1 42.8 40.0 2.8
Newark 59.9 57.6 2.3 41.2 42.1 -0.9
Oakland 62.2 58.1 4.1 43.9 44.3 -0.4
Oakland Airport 57.7 56.9 0.8 38.3 41.7 -3.4

South Bay and Santa Cruz County...

Ben Lomond 68.6 61.5 7.1 33.4 37.0 -3.6
Gilroy 64.9 60.4 4.5 37.5 38.0 -0.5
Moffett field 62.0 58.7 3.3 41.7 42.9 -1.2
Mount Hamilton 53.5 48.7 4.8 41.5 38.4 3.1
San Jose 61.8 58.1 3.7 39.9 42.0 -2.1
Watsonville 65.0 60.9 4.1 37.5 39.4 -1.9
Watsonville ap 65.5 61.3 4.2 40.1 39.5 0.6

Monterey and San Benito counties...

Carmel Valley 66.4 61.9 4.5 38.1 39.2 -1.1
Hollister 62.5 60.1 2.4 36.6 38.2 -1.6
King City 66.6 63.6 3.0 34.6 37.7 -3.1
Monterey 61.2 58.3 2.9 44.2 43.7 0.5
Monterey Airport 61.8 59.5 2.3 41.4 42.5 -1.1
Salinas 66.5 62.3 4.2 38.2 39.5 -1.3
Salinas Airport 65.1 61.3 3.8 39.9 41.3 -1.4


        ... January regional precipitation summary...

                             normal
                   Jan Jan percent
location total precip of normal

North Bay...

Calistoga 6.92 8.16 85
Cloverdale 6.30 8.43 75
Fort Ross 7.38 7.23 102
Healdsburg 9.41 8.54 110
Kentfield 8.28 9.13 91
Muir Woods 5.37 6.97 77
Napa 4.89 5.13 95
Napa Airport 4.00 4.38 91
occidental 11.82 11.11 106
Petaluma Airport 4.61 4.93 94
Saint Helena 5.77 6.94 83
Santa Rosa 6.31 5.93 106
Sonoma County ap 6.97 7.05 99
Sonoma 4.92 6.02 82

San Francisco peninsula...

Half Moon Bay 2.18 5.53 39
Palo Alto 1.84 3.06 60
Redwood City 2.82 4.02 70
San Francisco
Airport 2.16 4.19 52
San Francisco
downtown 2.68 4.50 60
Woodside 4.10 5.98 69

East Bay...

Berkeley 3.38 4.98 68
Concord Airport 2.38 3.27 73
Fremont 1.19 3.07 39
Hayward Airport 1.56 3.30 47
Livermore 1.52 2.87 53
Livermore Airport 1.64 3.01 54
Martinez 2.87 4.01 72
Mount Diablo
Junction 3.81 4.77 80
Newark 0.95 2.95 32
Oakland 2.83 4.71 60
Oakland Airport 2.17 3.99 54

South Bay and Santa Cruz County...

Ben Lomond 8.81 10.06 88
Gilroy 4.40 4.38 100
Los Gatos 1.99 4.94 40
Moffett field 1.03 2.75 37
Mount Hamilton 3.15 4.68 67
San Jose 0.90 3.07 29
Santa Cruz 3.68 6.28 59
Watsonville 2.81 4.46 63
Watsonville ap 2.69 3.81 71

Monterey and San Benito counties...

Carmel Valley 2.32 3.82 61
Hollister 1.65 2.93 56
King City 1.30 2.32 56
Monterey 1.86 4.40 42
Monterey Airport 1.31 3.17 41
Pinnacles Nat Mon 1.52 3.48 44
Salinas 1.41 3.09 46
Salinas Airport 1.60 2.60 62


    ... daily temperature records for January 2012...


                                  record
                                  maximum previous
                                  temp record

1/01 Oakland museum 67 66 in 1997

1/01 Moffett field 70 69 in 1994

1/01 Gilroy 72 69 in 1980

1/04 Moffett field 69 66 in 1986

1/04 Santa Rosa 72 72 in 1919

1/04 Livermore 69 69 in 1914

1/05 Oakland museum 67 66 in 2001

1/05 Moffett field 67 67 in 1986

1/05 Santa Rosa 70 70 in 2003

1/07 Kentfield 68 66 in 1943

1/07 Santa Rosa 70 70 in 1911

1/07 Richmond 67 67 in 2003


                                  record
                                  minimum previous
                                  temp record

1/17 Oakland museum 34 36 in 1997

1/17 Oakland Airport 28 32 in 2001

1/17 San Jose 29 30 in 1943

1/17 Napa 23 24 in 1963

1/17 Richmond 33 33 in 1963

1/17 Moffett field 29 29 in 1947

1/17 Santa Cruz 26 26 in 1917

1/17 Salinas Airport 27 27 in 1987

1/18 Oakland Airport 30 31 in 2007



      ... monthly ranks for downtown San Francisco...

Average high temperature... .59.3... .11th warmest out of 136 years
average low temperature... ..46.5... .42nd warmest out of 136 years
precipitation... ... ... .. 2.68 in... .53rd driest out of 162 years


      ... monthly extremes for select locations...

                     warmest coolest wettest
location day(s) day(s) day(s)


Santa Rosa Airport 1/05 1/07 1/27 1/17 1/20
                     70 deg 21 deg 2.77 in

San Francisco 1/04 1/07 1/17 1/20
                     66 deg 40 deg 1.41 in

San Jose 1/01 1/07 1/08
                     1/13 1/17 1/20
                     68 deg 29 deg 0.44 in

Salinas Airport 1/13 1/17 1/20
                     77 deg 27 deg 0.60 in



Note: this climatological data is preliminary. For official
certified climatological data please contact the National
climatic data center at 828-271-4800 or http://www.Ncdc.NOAA.Gov.
Official values as determined at the above web site may take
several months for authentication and publication.