Half Moon Bay, CA

12:11 AM PDT on May 25, 2012 (GMT -0700)
Elev: 102 ft
Lon: 122.4° W
Lat: 37.4° N
Source
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Active Advisory: Special Statement (US Severe Weather)
Tropical Weather: Invest 94 (North Atlantic) Hurricane Bud (East Pacific) Typhoon Sanvu (Western Pacific)
Weather Summary
Jessica Parker
Weather Underground Forecast for Friday, May 25, 2012.

Expect more active weather to develop across the Great Lakes on Friday, as a low pressure system moves from the Upper Midwest into eastern Canada. This system will push a cold front over the Great Lakes and Midwest, producing scattered showers and thunderstorms throughout the day. There is a slight chance that some of these storms will turn severe with strong winds and large hail. Rainfall totals will range from 1 to 2 inches, with over 2 inches likely in areas of severe weather development.

Behind this activity in the West, a low pressure system will move over the Great Basin and into the Southern Rockies. Flow around this system will produce cooler temperatures across the West, while also triggering scattered showers over the Pacific Northwest, northern California, and Intermountain West. Snow showers may develop again across the highest elevations of the Northern Rockies.

Meanwhile in the East, high pressure builds from the Plains, over the Mississippi River Valley, and into the Eastern US. This will keep moisture away to the north, allowing for dry, sunny, and warm conditions. High temperatures will range in the 80s and 90s from the Central Plains through the Eastern Valleys, with parts of the Southern US reaching into the lower 100s.
Weather Underground Forecast for Friday, May 25, 2012.

Expect more active weather to develop across the Great Lakes on Friday, as a low pressure system moves from the Upper Midwest into eastern Canada. This system will push a cold front over the Great Lakes and Midwest, producing scattered showers and thunderstorms throughout the day. There is a slight chance that some of these storms will turn severe with strong winds and large hail. Rainfall totals will range from 1 to 2 inches, with over 2 inches likely in areas of severe weather development.

Behind this activity in the West, a low pressure system will move over the Great Basin and into the Southern Rockies. Flow around this system will produce cooler temperatures across the West, while also triggering scattered showers over the Pacific Northwest, northern California, and Intermountain West. Snow showers may develop again across the highest elevations of the Northern Rockies.

Meanwhile in the East, high pressure builds from the Plains, over the Mississippi River Valley, and into the Eastern US. This will keep moisture away to the north, allowing for dry, sunny, and warm conditions. High temperatures will range in the 80s and 90s from the Central Plains through the Eastern Valleys, with parts of the Southern US reaching into the lower 100s.
Weather Underground Broadcast Network

Half Moon Bay Weather at a Glance

Updated 12:11 AM PDT
Weather Station - report
Half Moon Bay, HMB
Elevation
95 ft
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Now
Mostly Cloudy
Mostly Cloudy
Temperature
50.8 °F
Feels Like 50.8 °F
Wind(mph)
4.0
Sunrise / Set
5:53 AM
8:20 PM
Moon
Waxing Crescent
Tonight
Partly Cloudy 46 °F
Partly Cloudy
Friday
Thunderstorm 55 °F
T-storms
20% chance of precipitation
Friday Night
Thunderstorm 48 °F
T-storms
20% chance of precipitation
Saturday
Partly Cloudy 55 | 46 °F
Partly Cloudy
Sunday
Partly Cloudy 57 | 48 °F
Partly Cloudy
Monday
Fog 57 | 48 °F
Fog
Today is forecast to be nearly the same temperature as yesterday.
Conditions
Pressure
29.81 in
Visibility
5.0 miles
Clouds
Mostly Cloudy 1700 ft
Moisture
Humidity
89%
Rainfall
0.00 in
Snow Depth
Not available.
METAR
METAR KHAF 250655Z AUTO 35018G24KT 5SM BR BKN017 10/08 A2981 RMK AO2
Don't speak METAR? Read our FAQ.
Weather Radio
Launch Weather Radio
Temperature
Temperature
50.8 °F
Dew Point
48 °F
Wind
Speed / Dir
4.0 mph from North
Wind Gust
4.0 mph
Health
UV
0 out of 16
Pollen
6.40 out of 12
Pollen Forecast
Air Quality
Not available.
Flu Activity
Local Activity
View Flu Map
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Source: BestForecast
Descriptive Forecast
Friday
tstorms Partly cloudy with thunderstorms and a chance of rain in the morning, then mostly cloudy with thunderstorms and a chance of rain. High of 55F. Breezy. Winds from the NW at 20 to 25 mph with gusts to 30 mph. Chance of rain 20%.
Friday Night
nt_tstorms Mostly cloudy with thunderstorms and a chance of rain in the evening, then partly cloudy. Low of 48F. Breezy. Winds from the NW at 10 to 20 mph. Chance of rain 20%.
Saturday
partlycloudy Partly cloudy. High of 55F. Winds from the WNW at 10 to 15 mph.
Saturday Night
nt_partlycloudy Partly cloudy. Low of 46F. Winds from the WNW at 10 to 15 mph.
Sunday
partlycloudy Partly cloudy in the morning, then clear. High of 57F. Winds from the WNW at 10 to 15 mph.
Sunday Night
nt_mostlycloudy Overcast. Fog overnight. Low of 48F. Winds from the NW at 10 to 15 mph.
Monday
partlycloudy Overcast in the morning, then partly cloudy. Fog early. High of 57F. Winds from the WNW at 10 to 15 mph.
Monday Night
nt_partlycloudy Partly cloudy. Fog overnight. Low of 48F. Winds from the WNW at 5 to 15 mph.
Tuesday
partlycloudy Mostly cloudy in the morning, then clear. High of 59F. Winds from the WNW at 10 to 15 mph.
Tuesday Night
nt_partlycloudy Partly cloudy. Fog overnight. Low of 48F. Winds from the WNW at 5 to 15 mph.
Wednesday
partlycloudy Partly cloudy. High of 61F. Winds from the West at 5 to 10 mph.
Wednesday Night
nt_clear Clear. Fog overnight. Low of 50F. Winds less than 5 mph.
Thursday
clear Clear. High of 61F. Winds from the WSW at 5 to 10 mph.
Thursday Night
nt_clear Clear. Low of 54F. Winds from the WSW at 5 to 10 mph.
Friday
clear Clear. High of 64F. Winds from the WNW at 5 to 15 mph.
Friday Night
nt_clear Partly cloudy. Low of 54F. Winds from the WNW at 10 to 15 mph.
Saturday
clear Clear. High of 61F. Winds from the WNW at 5 to 15 mph.
Saturday Night
nt_partlycloudy Partly cloudy. Low of 52F. Winds from the WNW at 10 to 15 mph.
Sunday
partlycloudy Partly cloudy. High of 61F. Breezy. Winds from the WNW at 10 to 20 mph.
Sunday Night
nt_clear Clear. Low of 52F. Breezy. Winds from the NW at 10 to 20 mph.
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Forecast

View Calendar 10-Day Forecast for station KCAHALFM5

Friday, 25
Thunderstorm
55 | 48 °F
T-storms
Chance of
Precipitation
20%
Saturday, 26
Partly Cloudy
55 | 46 °F
Partly Cloudy
Chance of
Precipitation
10%
Sunday, 27
Partly Cloudy
57 | 48 °F
Partly Cloudy
Chance of
Precipitation
10%
Monday, 28
Fog
57 | 48 °F
Fog
Chance of
Precipitation
0%
Tuesday, 29
Partly Cloudy
59 | 48 °F
Partly Cloudy
Chance of
Precipitation
0%
Wednesday, 30
Partly Cloudy
61 | 50 °F
Partly Cloudy
Chance of
Precipitation
0%
Thursday, 31
Clear
61 | 54 °F
Clear
Chance of
Precipitation
0%
Friday, 1
Clear
64 | 54 °F
Clear
Chance of
Precipitation
0%
Saturday, 2
Clear
61 | 52 °F
Clear
Chance of
Precipitation
0%
Sunday, 3
Partly Cloudy
61 | 52 °F
Partly Cloudy
Chance of
Precipitation
0%
Source: BestForecast at 7:14 PM PDT on May 24, 2012
Descriptive Forecast
Friday
tstorms Partly cloudy with thunderstorms and a chance of rain in the morning, then mostly cloudy with thunderstorms and a chance of rain. High of 55F. Breezy. Winds from the NW at 20 to 25 mph with gusts to 30 mph. Chance of rain 20%.
Friday Night
nt_tstorms Mostly cloudy with thunderstorms and a chance of rain in the evening, then partly cloudy. Low of 48F. Breezy. Winds from the NW at 10 to 20 mph. Chance of rain 20%.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 50 | 45 54 | 48 55 | 48 51 | 49
Wind 22 mph NW 23 mph NW 19 mph NW 14 mph NW
Humidity 81% 78% 79% 91%
Chance of Precip. 20% 20% 20% 10%
Cloud Cover 66% 59% 71% 36%
Conditions Chance of Rain Thunderstorm Thunderstorm Partly Cloudy
Sunrise & Sunset
5:53 AM
8:20 PM
The quality of the forecasted high temperature for this day is good. MaxT RMSE [2.05], Average RMSE [2.53]
The National Weather Service forecast quality is good. MaxT RMSE [2.06], Average RMSE [2.16] : Use NWS
Source: BestForecast at 7:14 PM PDT on May 24, 2012
Descriptive Forecast
Saturday
partlycloudy Partly cloudy. High of 55F. Winds from the WNW at 10 to 15 mph.
Saturday Night
nt_partlycloudy Partly cloudy. Low of 46F. Winds from the WNW at 10 to 15 mph.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 49 | 47 54 | 52 54 | 52 51 | 47
Wind 11 mph NW 13 mph WNW 14 mph WNW 10 mph WNW
Humidity 92% 94% 93% 90%
Chance of Precip. 10% 10% 10% 10%
Cloud Cover 52% 51% 63% 63%
Conditions Partly Cloudy Partly Cloudy Partly Cloudy Partly Cloudy
Sunrise & Sunset
5:52 AM
8:21 PM
The quality of the forecasted high temperature for this day is good. MaxT RMSE [2.10], Average RMSE [3.20]
The National Weather Service forecast quality is good. MaxT RMSE [2.11], Average RMSE [2.16] : Use NWS
Source: BestForecast at 7:14 PM PDT on May 24, 2012
Descriptive Forecast
Sunday
partlycloudy Partly cloudy in the morning, then clear. High of 57F. Winds from the WNW at 10 to 15 mph.
Sunday Night
nt_mostlycloudy Overcast. Fog overnight. Low of 48F. Winds from the NW at 10 to 15 mph.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 49 | 47 55 | 53 56 | 54 51 | 49
Wind 7 mph NW 10 mph WNW 13 mph WNW 13 mph NW
Humidity 96% 88% 91% 92%
Chance of Precip. 10% 10% 10% 10%
Cloud Cover 63% 13% 20% 100%
Conditions Partly Cloudy Clear Clear Fog
Sunrise & Sunset
5:52 AM
8:21 PM
The quality of the forecasted high temperature for this day is good. MaxT RMSE [1.59], Average RMSE [2.73]
The National Weather Service forecast quality is good. MaxT RMSE [1.90], Average RMSE [2.07] : Use NWS
Source: BestForecast at 7:14 PM PDT on May 24, 2012
Descriptive Forecast
Monday
partlycloudy Overcast in the morning, then partly cloudy. Fog early. High of 57F. Winds from the WNW at 10 to 15 mph.
Monday Night
nt_partlycloudy Partly cloudy. Fog overnight. Low of 48F. Winds from the WNW at 5 to 15 mph.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 49 | 47 53 | 50 54 | 51 50 | 48
Wind 11 mph NW 12 mph WNW 13 mph WNW 10 mph WNW
Humidity 95% 90% 92% 91%
Chance of Precip. 10% 10% 0% 0%
Cloud Cover 97% 33% 0% 2%
Conditions Fog Partly Cloudy Clear Fog
Sunrise & Sunset
5:51 AM
8:22 PM
The quality of the forecasted high temperature for this day is fair. MaxT RMSE [2.53], Average RMSE [2.83]
The National Weather Service forecast quality is good. MaxT RMSE [1.98], Average RMSE [2.12] : Use NWS
Source: BestForecast at 7:14 PM PDT on May 24, 2012
Descriptive Forecast
Tuesday
partlycloudy Mostly cloudy in the morning, then clear. High of 59F. Winds from the WNW at 10 to 15 mph.
Tuesday Night
nt_partlycloudy Partly cloudy. Fog overnight. Low of 48F. Winds from the WNW at 5 to 15 mph.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 49 | 47 54 | 50 55 | 51 52 | 49
Wind 8 mph NW 10 mph WNW 12 mph WNW 7 mph WNW
Humidity 94% 84% 83% 90%
Chance of Precip. 0% 0% 0% 0%
Cloud Cover 19% 2% 0% 26%
Conditions Fog Clear Clear Fog
Sunrise & Sunset
5:51 AM
8:23 PM
The quality of the forecasted high temperature for this day is fair. MaxT RMSE [2.67], Average RMSE [2.39]
The National Weather Service forecast quality is good. MaxT RMSE [2.17], Average RMSE [2.01] : Use NWS
Source: BestForecast at 7:14 PM PDT on May 24, 2012
Descriptive Forecast
Wednesday
partlycloudy Partly cloudy. High of 61F. Winds from the West at 5 to 10 mph.
Wednesday Night
nt_clear Clear. Fog overnight. Low of 50F. Winds less than 5 mph.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 50 | 48 58 | 54 60 | 55 53 | 50
Wind 4 mph WNW 6 mph West 8 mph West 4 mph West
Humidity 93% 86% 83% 90%
Chance of Precip. 0% 0% 0% 0%
Cloud Cover 74% 22% 0% 1%
Conditions Fog Clear Clear Fog
Sunrise & Sunset
5:51 AM
8:23 PM
The quality of the forecasted high temperature for this day is good. MaxT RMSE [2.46], Average RMSE [2.03]
The National Weather Service forecast quality is good. MaxT RMSE [2.18], Average RMSE [1.83] : Use NWS
Source: BestForecast at 7:14 PM PDT on May 24, 2012
Descriptive Forecast
Thursday
clear Clear. High of 61F. Winds from the WSW at 5 to 10 mph.
Thursday Night
nt_clear Clear. Low of 54F. Winds from the WSW at 5 to 10 mph.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 51 | 49 58 | 54 58 | 54 54 | 52
Wind 3 mph WSW 6 mph WSW 7 mph WSW 4 mph WSW
Humidity 93% 87% 85% 93%
Chance of Precip. 0% 0% 0% 0%
Cloud Cover 0% 0% 0% 0%
Conditions Clear Clear Clear Clear
Sunrise & Sunset
5:51 AM
8:23 PM
The quality of the forecasted high temperature for this day is good. MaxT RMSE [2.33], Average RMSE [2.21]
Source: BestForecast at 7:14 PM PDT on May 24, 2012
Descriptive Forecast
Friday
clear Clear. High of 64F. Winds from the WNW at 5 to 15 mph.
Friday Night
nt_clear Partly cloudy. Low of 54F. Winds from the WNW at 10 to 15 mph.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 54 | 53 59 | 58 62 | 60 55 | 53
Wind 6 mph WSW 9 mph WNW 14 mph WNW 11 mph WNW
Humidity 97% 94% 92% 95%
Chance of Precip. 0% 0% 0% 10%
Cloud Cover 2% 3% 3% 12%
Conditions Clear Clear Clear Clear
Sunrise & Sunset
5:51 AM
8:23 PM
The quality of the forecasted high temperature for this day is poor. MaxT RMSE [3.57], Average RMSE [2.36]
Source: BestForecast at 7:14 PM PDT on May 24, 2012
Descriptive Forecast
Saturday
clear Clear. High of 61F. Winds from the WNW at 5 to 15 mph.
Saturday Night
nt_partlycloudy Partly cloudy. Low of 52F. Winds from the WNW at 10 to 15 mph.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 55 | 51 57 | 53 56 | 50 53 | 48
Wind 9 mph WNW 10 mph WNW 14 mph WNW 11 mph WNW
Humidity 89% 81% 76% 84%
Chance of Precip. 10% 0% 0% 10%
Cloud Cover 21% 11% 1% 27%
Conditions Clear Clear Clear Partly Cloudy
Sunrise & Sunset
5:51 AM
8:23 PM
The quality of the forecasted high temperature for this day is fair. MaxT RMSE [3.37], Average RMSE [2.22]
Source: BestForecast at 7:14 PM PDT on May 24, 2012
Descriptive Forecast
Sunday
partlycloudy Partly cloudy. High of 61F. Breezy. Winds from the WNW at 10 to 20 mph.
Sunday Night
nt_clear Clear. Low of 52F. Breezy. Winds from the NW at 10 to 20 mph.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 53 | 49 57 | 47 57 | 42 53 | 44
Wind 10 mph NW 12 mph NW 17 mph WNW 13 mph NW
Humidity 87% 70% 57% 70%
Chance of Precip. 10% 0% 0% 0%
Cloud Cover 53% 31% 9% 5%
Conditions Partly Cloudy Partly Cloudy Clear Clear
Sunrise & Sunset
5:51 AM
8:23 PM
Source: BestForecast at 7:14 PM PDT on May 24, 2012
Descriptive Forecast
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 53 | 46 60 | 47 57 | 40 53 | 42
Wind 11 mph NW 11 mph NW 16 mph WNW 12 mph WNW
Humidity 78% 62% 51% 67%
Chance of Precip. 0% 0% 0% 0%
Cloud Cover 0% % % %
Conditions Clear Clear Clear Clear
Sunrise & Sunset
5:51 AM
8:23 PM
Scientific Forecaster Discussion — MOS Weather Graph
Nearby
History & Almanac
May 25, 2012 Max Temp Min Temp
Normal (KHAF) 62 °F 48 °F
Yesterday 57.9 °F 47.9 °F
Choose a date
Earthquake Activity
City Distance Mag. Time & Date
No recent earthquake activity has been reported nearby.
Minimum magnitude displayed is 2.5.
More information at USGS.gov
Coastal Water Temperatures
Place Temperature
Point Reyes, CA 51.1 °F
San Francisco, CA 55.0 °F
Richmond, CA 59.0 °F
Marine Forecast
Astronomy
May. 25, 2012 Rise Set
Actual Time 5:53 AM PDT 8:20 PM PDT
Civil Twilight 5:23 AM PDT 8:50 PM PDT
Nautical Twilight 4:46 AM PDT 9:27 PM PDT
Astronomical Twilight 4:05 AM PDT 10:09 PM PDT
Moon 9:56 AM PDT No Moon Set
Length Of Visible Light 15h 27m
Length of Day
14h 27m
Tomorrow will be 1m 17s longer.
Waxing Crescent, 17% of the Moon is Illuminated
Today
Waxing Crescent
May 28
First Quarter
Jun 4
Full
Jun 11
Last Quarter
Jun 19
New
Visit Astronomy
Today's Extremes
State Highs State Lows
99 °F
Needles
98 °F
Palm Springs
98 °F
Thermal
96 °F
Imperial
96 °F
Blythe
24 °F
Truckee-Tahoe
28 °F
South Lake Tahoe
30 °F
Alturas
35 °F
Weaverville
36 °F
Montague
Record Extremes
Snow Depth
Station Depth Elevation
Blue Lakes 1 in 8000 ft
Carson Pass 0 in 8500 ft
Forestdale Creek 1 in 8029 ft
Ebbetts Pass 0 in 8700 ft
Leavitt Lake 19 in 9400 ft
Snow Depth Reports — Snow Depth Map
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Travel Planning
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Nearby Events
Event Date Forecast
Mega Low Tide Mussel/Clam Extravaganza 8:00 AM PDT 2012-05-25 Chance of Rain, 48°F
Guerrilla Marketing Unveiled Workshop 9:00 AM PDT 2012-05-26 Overcast, 53°F
The Fred Ross Project 4:00 PM PDT 2012-05-27 Partly Cloudy, 55°F
Preventing the Risks Presented by Expatriate Managers - IN JAPANESE 11:00 AM PDT 2012-05-31 Partly Cloudy, 55°F
World Class Speaking:The Basics 1:00 PM PDT 2012-05-31 Partly Cloudy, 56°F
Twitter is huge, learn the tools and techniques to use it effectively 11:00 AM PDT 2012-06-01 Partly Cloudy, 57°F
Event data courtesy eviesays.com
Aviation
City Temp. Conditions Updated
Half Moon Bay 50 °F Mostly Cloudy 11:55 PM PDT
San Carlos 50 °F Scattered Clouds 11:50 PM PDT
San Francisco 50 °F Scattered Clouds 11:56 PM PDT
Palo Alto 55 °F Partly Cloudy 8:47 PM PDT
View all Aviation Tools
Flight To ETA Status
AAL17
New York, NY 		KSFO 12:06AM On Time
WOA2847
Los Angeles, CA 		KSFO 12:07AM On Time
UAL483
Los Angeles, CA 		KSFO 12:10AM On Time
AWE967
Philadelphia, PA 		KSFO 12:10AM On Time
Flight Tracker by FlightAware FlightAware
View U.S. Airport Delays
Type Condition
Flight Rule: MVFR (KHAF)
Wind Speed: 18.0 kts.
Wind Dir: 5° (North)
Ceiling: 1700 ft

METAR KHAF 250655Z AUTO 35018G24KT 5SM BR BKN017 10/08 A2981 RMK AO2

View all Reports & Maps
Sports
Event Date Forecast
Angels vs. Mariners 7:10 PM PDT on May 24, 2012 Chance of Rain, 54 °F
Royals vs. Orioles 7:05 PM EDT on May 25, 2012 Partly Cloudy, 81 °F
Yankees vs. Athletics 7:05 PM PDT on May 25, 2012 Thunderstorm, 56 °F
Yankees vs. Athletics 1:05 PM PDT on May 26, 2012 Partly Cloudy, 61 °F
Event Date Forecast
Athletic vs. Barcelona 12:00 PM CEST on May 25, 2012 Clear, High 84° F/ 29° C
Barcelona vs. Athletic 10:00 PM CEST on May 25, 2012 Clear, High 86° F/ 30° C
Event Date Forecast
Coca-Cola 600 6:16 PM EDT on May 27, 2012 Chance of a Thunderstorm, 85 °F
FedEx 400 benefiting Autism Speaks 1:15 PM EDT on June 03, 2012 Average High 79° F/ 26° C
Event Date Forecast
Crowne Plaza Invitational at Colonial 8:30 AM CDT on May 25, 2012 Overcast, 76 °F
Crowne Plaza Invitational at Colonial 8:30 AM CDT on May 26, 2012 Mostly Cloudy, 74 °F
View all Sports Weather
Weather Stations
Station Location Temp. Windchill Dew Point Humidity Wind Precipitation Elevation Updated Type Website
Half Moon Bay, HMB, CA 50.8 °F - 48 °F 89% North  at  4.0 mph 0.00 in / hr 95 ft 12:11 AM PDT Rapid Fire  
Higgins Canyon, Half Moon Bay, CA 46.8 °F 44 °F 43 °F 88% SSE  at  5.0 mph 0.00 in / hr 380 ft 12:11 AM PDT Rapid Fire  
SLS, TUNITAS CREEK, CA 47.8 °F 46 °F 44 °F 86% WNW  at  4.0 mph 0.00 in / hr 450 ft 12:11 AM PDT Rapid Fire  
HMBYC, Princeton, CA 50.5 °F - 45 °F 80% WNW  at  17.0 mph 0.00 in / hr 10 ft 12:11 AM PDT Rapid Fire  
Near Pillar Point Harbor, Half Moon Bay, CA 50.4 °F - 48 °F 91% SSW  at  6.0 mph 0.00 in / hr 50 ft 12:11 AM PDT Rapid Fire  
RAWS PULGAS CA, Half Moon Bay, CA 49 °F 42 °F 37 °F 64% WNW  at  19 mph 0.00 in / hr 644 ft 11:38 PM PDT MADIS
Arbor Lane, Moss Beach, CA 48.7 °F 46 °F - - East  at  6.0 mph - / hr 20 ft 12:06 AM PDT Normal  
Montara, CA 50.2 °F - 46 °F 86% NNW  at  0.0 mph 0.00 in / hr 150 ft 12:11 AM PDT Rapid Fire  
Upper Hillsborough, Hillsborough, CA 48.1 °F 44 °F 44 °F 87% West  at  9.0 mph 0.00 in / hr 536 ft 12:11 AM PDT Rapid Fire  
Beverly Terrace, San Carlos, CA 47.1 °F 44 °F 42 °F 82% SW  at  7.0 mph 0.00 in / hr 812 ft 12:10 AM PDT Normal  
APRSWXNET Belmont CA , Belmont, CA 49 °F 45 °F 42 °F 77% South  at  9 mph 0.00 in / hr 357 ft 11:41 PM PDT MADIS
Emerald Hills, Emerald Hills, CA 50.4 °F - 39 °F 64% SW  at  13.0 mph 0.00 in / hr 705 ft 8:52 PM PDT Rapid Fire  
Emerald Hills, Redwood City, CA 50.3 °F - 38 °F 63% WNW  at  18.0 mph 0.00 in / hr 790 ft 12:05 AM PDT Normal
Sunset Way, Emerald Hills, CA 48.1 °F 47 °F 40 °F 75% West  at  4.0 mph 0.00 in / hr 748 ft 12:10 AM PDT Normal
RAWS SPRING VALLEY CA, Millbrae, CA 44 °F 35 °F 41 °F 88% West  at  22 mph 0.00 in / hr 1075 ft 11:19 PM PDT MADIS
Laurelwood, San Mateo, CA 49.1 °F 47 °F 44 °F 82% NE  at  5.0 mph - / hr 300 ft 12:00 AM PDT Normal  
Lower Hillcrest, Emerald Hills, CA 49.5 °F 50 °F 40 °F 71% North  at  0.0 mph 0.00 in / hr 535 ft 12:11 AM PDT Rapid Fire  
Woodside Glens, Woodside, CA 51.4 °F - 43 °F 73% ENE  at  2.0 mph 0.00 in / hr 381 ft 12:10 AM PDT Normal  
Stulsaft Park, Redwood City, CA 51.5 °F - 40 °F 66% North  at  0.0 mph 0.00 in / hr 233 ft 12:11 AM PDT Rapid Fire  
Canyon Rd. Redwood City, CA, Redwood City, CA 50.0 °F - 45 °F 83% East  at  2.7 mph - / hr 0 ft 11:57 PM PDT Normal  
Redwood City Hills, Redwood City, CA 53.1 °F - 40 °F 61% WNW  at  10.3 mph 0.00 in / hr 170 ft 12:10 AM PDT Rapid Fire  
Woodside, Woodside, CA 50.3 °F - 40 °F 69% SE  at  1.0 mph 0.00 in / hr 375 ft 12:10 AM PDT Normal  
San Gregorio, CA 48.0 °F 48 °F -48 °F - North  at  0.0 mph 0.00 in / hr 590 ft 12:00 AM PDT Normal
Burlingame, Burlingame, CA 50.0 °F 48 °F 41 °F 73% WSW  at  6.3 mph 0.00 in / hr 400 ft 12:10 AM PDT Normal  
Sterling Heights, Redwood City, CA 50.6 °F - 25 °F 37% NE  at  2.0 mph 0.00 in / hr 134 ft 12:11 AM PDT Rapid Fire  
White Oaks, San Carlos, CA 50.7 °F - 43 °F 74% West  at  3.0 mph 0.00 in / hr 52 ft 12:01 AM PDT Normal  
Lauriedale, San Mateo, CA 52.2 °F - 45 °F 75% NW  at  2.0 mph 0.00 in / hr 30 ft 12:11 AM PDT Rapid Fire  
Edgewood Park, Redwood City, CA 51.3 °F - 42 °F 71% NNE  at  2.3 mph 0.00 in / hr 53 ft 12:09 AM PDT Normal  
Belmont - Island Park, Belmont, CA 50.7 °F - 41 °F 68% NNW  at  8.3 mph 0.00 in / hr 5 ft 12:11 AM PDT Rapid Fire
Centennial, Redwood City, CA 51.7 °F - 44 °F 75% ESE  at  1.0 mph 0.00 in / hr 10 ft 12:00 AM PDT Normal
MesoWest San Carlos , Redwood City, CA 52 °F - 41 °F 65% WNW  at  15 mph 0.00 in / hr 0 ft 11:00 PM PDT MADIS
Beresford Ave, Redwood City, CA 53.6 °F - 40 °F 62% NW  at  6.7 mph 0.00 in / hr 66 ft 12:07 AM PDT Normal
Redwood Shores, Redwood City, CA 51.8 °F - 43 °F 71% NNW  at  0.0 mph 0.00 in / hr 0 ft 12:11 AM PDT Rapid Fire
Cuesta La Honda, La Honda, CA 50.2 °F - 44 °F 79% WNW  at  2.7 mph 2.59 in / hr 450 ft 12:11 AM PDT Rapid Fire
Cuesta La Honda, La Honda, CA 47.3 °F 43 °F 46 °F 94% WNW  at  10.5 mph 0.00 in / hr 862 ft 12:11 AM PDT Rapid Fire
Kings Mountain, Woodside, CA 42.4 °F 39 °F 41 °F 95% West  at  6.0 mph 0.00 in / hr 1700 ft 12:11 AM PDT Rapid Fire  
Skywood, Woodside, CA 45.1 °F 45 °F 36 °F 70% NNW  at  0.0 mph 0.00 in / hr 1453 ft 12:10 AM PDT Normal  
King's Mountain 2100ft, Woodside, CA 40.8 °F 37 °F 35 °F 81% WSW  at  5.0 mph 0.00 in / hr 2100 ft 12:08 AM PDT Normal  
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Special Statement
Mobile & Email Alerts Statement as of 10:01 PM PDT on May 24, 2012

... Much cooler with a chance of showers and isolated thunderstorms Friday...

An unseasonably cold weather system will rapidly approach the Bay
area overnight... arriving by Friday morning. Rain showers
currently associated with this system are being reported in
southern Oregon with radars west of Cape Mendocino starting to
pick up returns. The main impact of the system will be cool
temperatures and a continuation of the breezy to locally windy
weather we've been having the last few days.

Skies will start out sunny but with cold morning temperatures in
the upper 30s and 40s for many portions of the Bay area. By
mid-morning the core of the system will pass overhead with very
unstable air aloft. This will allow for cumulus cloud development
over the hills of the Bay area. Rain showers will be possible
through the afternoon hours... especially over the hills but its
possible that any showers could drift over the valleys. Anybody
with outdoor interests such as camping our hiking on Friday should
be prepared for unseasonably cool... possibly wet and windy weather.

Finally... the latest computer model projections have been
consistent in showing an above average chance of thunderstorms
over the far eastern portions of our district... roughly running
southward form the hills of Napa County through the far East Bay
valleys and continuing southward over the higher and mostly
unpopulated areas of Santa Clara and San Benito counties. These
far eastern counties of the Bay area will have the best chance for
seeing thunderstorms roughly from 2 PM to 7 PM Friday afternoon
and evening. Freezing levels will drop to around 6000 feet so ice
pellets and small hail will be possible in some of the heavier
cells along with dangerous cloud to ground lightning.

Any hail that falls on roads can quickly lead to traffic
accidents... especially on the get away Friday of a three day
Holiday weekend. The National Weather Service and California
Highway patrol urge motorists to slow down and stay abreast of the
latest forecast information before heading out this Holiday
weekend. As a reminder... folks heading to the Sierra should expect
winter weather conditions Friday night into Saturday with snow
over the trans-Sierra passes. There are currently snow advisories
in effect for that West Slope of the Sierra until 6 PM Friday.

Http://weather.Gov/sanfrancisco


R walbrun