Cupertino, CA

11:18 PM PDT on May 24, 2012 (GMT -0700)
Elev: 538 ft
Lon: 122.1° W
Lat: 37.3° N
Source
Rapid Fire Updates™
 Updated 11:14 PM PDT Get Free Weather Stickers® Share:
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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

Cupertino Weather at a Glance

Updated 11:14 PM PDT
Weather Station - report
Monta Vista, Cupertino
Elevation
387 ft
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Now
Clear
Clear
Temperature
49.5 °F
Feels Like 50 °F
Wind(mph)
0.0
Sunrise / Set
5:52 AM
8:17 PM
Moon
Waxing Crescent
Tonight
Clear 46 °F
Clear
Tomorrow
Thunderstorm 66 °F
T-storms
20% chance of precipitation
Tomorrow Night
Thunderstorm 46 °F
T-storms
20% chance of precipitation
Saturday
Partly Cloudy 66 | 46 °F
Partly Cloudy
Sunday
Partly Cloudy 73 | 48 °F
Partly Cloudy
Monday
Partly Cloudy 72 | 45 °F
Partly Cloudy
Tomorrow is forecast to be Cooler than today.
Conditions
Pressure
29.82 in
Visibility
10.0 miles
Clouds
Clear -
Moisture
Humidity
65%
Rainfall
0.00 in
Snow Depth
Not available.
METAR
METAR KNUQ 250556Z AUTO VRB05KT 10SM CLR 12/04 A2981 RMK AO2 SLP097 T01220039 10194 20122 51009 TSNO
Don't speak METAR? Read our FAQ.
Weather Radio
Launch Weather Radio
Temperature
Windchill
50 °F
Dew Point
38 °F
Wind
Speed / Dir
Calm
Wind Gust
1.6 mph
Health
UV
0 out of 16
Pollen
6.40 out of 12
Pollen Forecast
Ozone
Good
PM2.5
Good
Flu Activity
Local Activity
View Flu Map
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Source: BestForecast
Descriptive Forecast
Thursday Night
nt_clear Partly cloudy with a chance of rain after midnight. Low of 46F. Breezy. Winds from the WNW at 15 to 20 mph. Chance of rain 20%.
Friday
tstorms Partly cloudy with thunderstorms and a chance of rain. High of 66F. Breezy. Winds from the WNW at 20 to 25 mph. Chance of rain 20%.
Friday Night
nt_tstorms Partly cloudy with thunderstorms and a chance of rain. Low of 46F. Winds from the West at 5 to 10 mph. Chance of rain 20%.
Saturday
partlycloudy Partly cloudy. High of 66F. Winds from the West at 5 to 15 mph.
Saturday Night
nt_partlycloudy Partly cloudy. Low of 46F. Winds from the WNW at 5 to 15 mph.
Sunday
partlycloudy Partly cloudy in the morning, then clear. High of 73F. Winds from the WNW at 5 to 15 mph.
Sunday Night
nt_partlycloudy Partly cloudy in the evening, then overcast. Fog overnight. Low of 48F. Winds from the WNW at 5 to 10 mph.
Monday
partlycloudy Overcast in the morning, then clear. High of 72F. Winds from the WNW at 5 to 15 mph.
Monday Night
nt_partlycloudy Partly cloudy. Fog overnight. Low of 45F. Winds from the WNW at 5 to 10 mph.
Tuesday
partlycloudy Clear. High of 72F. Winds from the West at 5 to 15 mph.
Tuesday Night
nt_partlycloudy Clear. Fog overnight. Low of 46F. Winds less than 5 mph.
Wednesday
partlycloudy Partly cloudy. High of 75F. Winds from the West at 5 to 10 mph.
Wednesday Night
nt_clear Clear. Low of 52F. Winds less than 5 mph.
Thursday
clear Clear. High of 79F. Winds from the WSW at 5 to 10 mph.
Thursday Night
nt_clear Clear. Low of 52F. Winds less than 5 mph.
Friday
clear Clear. High of 77F. Winds from the West at 5 to 15 mph.
Friday Night
nt_clear Partly cloudy. Low of 52F. Winds from the West at 5 to 15 mph.
Saturday
clear Clear. High of 73F. Winds from the WNW at 5 to 15 mph.
Saturday Night
nt_partlycloudy Partly cloudy. Low of 50F. Winds from the WNW at 5 to 15 mph.
Sunday
partlycloudy Partly cloudy. High of 73F. Winds from the WNW at 5 to 20 mph.
Sunday Night
nt_clear Clear. Low of 50F. Winds from the WNW at 5 to 15 mph.
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Forecast

View Calendar 10-Day Forecast for station KCACUPER5

Friday, 25
Thunderstorm
66 | 46 °F
T-storms
Chance of
Precipitation
20%
Saturday, 26
Partly Cloudy
66 | 46 °F
Partly Cloudy
Chance of
Precipitation
0%
Sunday, 27
Partly Cloudy
73 | 48 °F
Partly Cloudy
Chance of
Precipitation
0%
Monday, 28
Partly Cloudy
72 | 45 °F
Partly Cloudy
Chance of
Precipitation
0%
Tuesday, 29
Partly Cloudy
72 | 46 °F
Partly Cloudy
Chance of
Precipitation
0%
Wednesday, 30
Partly Cloudy
75 | 52 °F
Partly Cloudy
Chance of
Precipitation
0%
Thursday, 31
Clear
79 | 52 °F
Clear
Chance of
Precipitation
0%
Friday, 1
Clear
77 | 52 °F
Clear
Chance of
Precipitation
0%
Saturday, 2
Clear
73 | 50 °F
Clear
Chance of
Precipitation
0%
Sunday, 3
Partly Cloudy
73 | 50 °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. High of 66F. Breezy. Winds from the WNW at 20 to 25 mph. Chance of rain 20%.
Friday Night
nt_tstorms Partly cloudy with thunderstorms and a chance of rain. Low of 46F. Winds from the West at 5 to 10 mph. Chance of rain 20%.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 48 | 38 61 | 45 58 | 46 53 | 47
Wind 19 mph WNW 21 mph WNW 13 mph WNW 7 mph WSW
Humidity 72% 54% 61% 83%
Chance of Precip. 20% 20% 20% 10%
Cloud Cover 58% 62% 67% 35%
Conditions Chance of Rain Thunderstorm Thunderstorm Partly Cloudy
Sunrise & Sunset
5:52 AM
8:17 PM
The quality of the forecasted high temperature for this day is good. MaxT RMSE [2.09], Average RMSE [1.11]
The National Weather Service forecast quality is good. MaxT RMSE [2.21], Average RMSE [1.40] : Use NWS
Source: BestForecast at 7:14 PM PDT on May 24, 2012
Descriptive Forecast
Saturday
partlycloudy Partly cloudy. High of 66F. Winds from the West at 5 to 15 mph.
Saturday Night
nt_partlycloudy Partly cloudy. Low of 46F. Winds from the WNW at 5 to 15 mph.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 52 | 47 64 | 52 61 | 46 51 | 46
Wind 3 mph West 8 mph West 11 mph WNW 5 mph WNW
Humidity 87% 62% 59% 81%
Chance of Precip. 10% 10% 0% 0%
Cloud Cover 53% 36% 35% 58%
Conditions Partly Cloudy Partly Cloudy Partly Cloudy Partly Cloudy
Sunrise & Sunset
5:52 AM
8:18 PM
The quality of the forecasted high temperature for this day is fair. MaxT RMSE [2.85], Average RMSE [1.35]
The National Weather Service forecast quality is fair. MaxT RMSE [2.53], Average RMSE [1.67] : 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 73F. Winds from the WNW at 5 to 15 mph.
Sunday Night
nt_partlycloudy Partly cloudy in the evening, then overcast. Fog overnight. Low of 48F. Winds from the WNW at 5 to 10 mph.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 50 | 47 66 | 48 66 | 46 53 | 49
Wind 2 mph West 7 mph WNW 11 mph NW 7 mph WNW
Humidity 84% 51% 50% 84%
Chance of Precip. 0% 0% 0% 0%
Cloud Cover 56% 13% 18% 62%
Conditions Partly Cloudy Clear Clear Fog
Sunrise & Sunset
5:51 AM
8:19 PM
The quality of the forecasted high temperature for this day is fair. MaxT RMSE [3.06], Average RMSE [2.50]
The National Weather Service forecast quality is fair. MaxT RMSE [2.52], Average RMSE [1.70] : Use NWS
Source: BestForecast at 7:14 PM PDT on May 24, 2012
Descriptive Forecast
Monday
partlycloudy Overcast in the morning, then clear. High of 72F. Winds from the WNW at 5 to 15 mph.
Monday Night
nt_partlycloudy Partly cloudy. Fog overnight. Low of 45F. Winds from the WNW at 5 to 10 mph.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 52 | 47 66 | 52 62 | 50 51 | 46
Wind 6 mph WNW 10 mph WNW 10 mph WNW 5 mph WNW
Humidity 84% 59% 63% 82%
Chance of Precip. 10% 10% 0% 0%
Cloud Cover 99% 1% 0% 1%
Conditions Fog Clear Clear Clear
Sunrise & Sunset
5:51 AM
8:20 PM
The quality of the forecasted high temperature for this day is poor. MaxT RMSE [3.58], Average RMSE [2.73]
The National Weather Service forecast quality is fair. MaxT RMSE [2.79], Average RMSE [1.91] : Use NWS
Source: BestForecast at 7:14 PM PDT on May 24, 2012
Descriptive Forecast
Tuesday
partlycloudy Clear. High of 72F. Winds from the West at 5 to 15 mph.
Tuesday Night
nt_partlycloudy Clear. Fog overnight. Low of 46F. Winds less than 5 mph.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 52 | 46 65 | 49 67 | 50 53 | 46
Wind 4 mph WNW 8 mph West 10 mph WNW 4 mph WNW
Humidity 79% 55% 54% 77%
Chance of Precip. 0% 0% 0% 0%
Cloud Cover 8% 0% 0% 1%
Conditions Fog Clear Clear Clear
Sunrise & Sunset
5:50 AM
8:20 PM
The quality of the forecasted high temperature for this day is poor. MaxT RMSE [5.02], Average RMSE [2.13]
The National Weather Service forecast quality is fair. MaxT RMSE [3.21], Average RMSE [1.88] : Use NWS
Source: BestForecast at 7:14 PM PDT on May 24, 2012
Descriptive Forecast
Wednesday
partlycloudy Partly cloudy. High of 75F. Winds from the West at 5 to 10 mph.
Wednesday Night
nt_clear Clear. Low of 52F. Winds less than 5 mph.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 54 | 46 68 | 49 71 | 51 57 | 51
Wind 2 mph West 6 mph WNW 7 mph West 3 mph WSW
Humidity 72% 47% 50% 77%
Chance of Precip. 0% 0% 0% 0%
Cloud Cover 36% 74% 0% 0%
Conditions Fog Mostly Cloudy Clear Clear
Sunrise & Sunset
5:50 AM
8:20 PM
The quality of the forecasted high temperature for this day is poor. MaxT RMSE [6.73], Average RMSE [2.61]
The National Weather Service forecast quality is poor. MaxT RMSE [3.86], Average RMSE [2.18] : Use NWS
Source: BestForecast at 7:14 PM PDT on May 24, 2012
Descriptive Forecast
Thursday
clear Clear. High of 79F. Winds from the WSW at 5 to 10 mph.
Thursday Night
nt_clear Clear. Low of 52F. Winds less than 5 mph.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 56 | 47 72 | 50 71 | 51 55 | 49
Wind 2 mph WSW 6 mph WSW 7 mph WSW 4 mph SW
Humidity 74% 45% 49% 78%
Chance of Precip. 0% 0% 0% 0%
Cloud Cover 0% 0% 0% 0%
Conditions Clear Clear Clear Clear
Sunrise & Sunset
5:50 AM
8:20 PM
The quality of the forecasted high temperature for this day is poor. MaxT RMSE [5.79], Average RMSE [2.85]
Source: BestForecast at 7:14 PM PDT on May 24, 2012
Descriptive Forecast
Friday
clear Clear. High of 77F. Winds from the West at 5 to 15 mph.
Friday Night
nt_clear Partly cloudy. Low of 52F. Winds from the West at 5 to 15 mph.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 56 | 50 72 | 54 70 | 55 57 | 51
Wind 4 mph WSW 6 mph West 12 mph WNW 7 mph West
Humidity 80% 53% 58% 80%
Chance of Precip. 0% 10% 10% 10%
Cloud Cover 1% 3% 4% 12%
Conditions Clear Clear Clear Clear
Sunrise & Sunset
5:50 AM
8:20 PM
The quality of the forecasted high temperature for this day is poor. MaxT RMSE [3.97], Average RMSE [3.86]
Source: BestForecast at 7:14 PM PDT on May 24, 2012
Descriptive Forecast
Saturday
clear Clear. High of 73F. Winds from the WNW at 5 to 15 mph.
Saturday Night
nt_partlycloudy Partly cloudy. Low of 50F. Winds from the WNW at 5 to 15 mph.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 54 | 50 70 | 62 67 | 57 55 | 49
Wind 6 mph West 8 mph WNW 12 mph WNW 8 mph WNW
Humidity 86% 77% 71% 82%
Chance of Precip. 10% 0% 0% 10%
Cloud Cover 19% 10% 1% 23%
Conditions Clear Clear Clear Clear
Sunrise & Sunset
5:50 AM
8:20 PM
The quality of the forecasted high temperature for this day is poor. MaxT RMSE [4.24], Average RMSE [2.81]
Source: BestForecast at 7:14 PM PDT on May 24, 2012
Descriptive Forecast
Sunday
partlycloudy Partly cloudy. High of 73F. Winds from the WNW at 5 to 20 mph.
Sunday Night
nt_clear Clear. Low of 50F. Winds from the WNW at 5 to 15 mph.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 52 | 49 68 | 58 67 | 51 55 | 44
Wind 7 mph WNW 9 mph WNW 15 mph WNW 10 mph WNW
Humidity 88% 68% 54% 67%
Chance of Precip. 10% 0% 0% 0%
Cloud Cover 45% 26% 8% 4%
Conditions Partly Cloudy Partly Cloudy Clear Clear
Sunrise & Sunset
5:50 AM
8:20 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 52 | 44 68 | 54 68 | 47 55 | 42
Wind 7 mph WNW 9 mph WNW 14 mph WNW 8 mph WNW
Humidity 74% 58% 47% 61%
Chance of Precip. 0% 0% 0% 0%
Cloud Cover 0% % % %
Conditions Clear Clear Clear Clear
Sunrise & Sunset
5:50 AM
8:20 PM
Scientific Forecaster Discussion — MOS Weather Graph
Nearby
History & Almanac
May 25, 2012 Max Temp Min Temp
Normal (KNUQ) 73 °F 54 °F
Record (KNUQ) 96 °F (1982) 45 °F (1972)
Yesterday 72 °F 52 °F
Yesterday's Heating Degree Days: 3
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
Air Quality
  Air Quality AQ Index Pollutant
Yesterday Good
OZONE
Yesterday Good
PM2.5
Current Good
OZONE
Current Good
PM2.5
Thursday Good
OZONE
Friday Good
OZONE
Saturday Good
OZONE
Sunday Good
OZONE
Monday Good
OZONE
Tuesday Good
OZONE
Coastal Water Temperatures
Place Temperature
San Francisco, CA 55.0 °F
Port Chicago, CA 64.0 °F
Marine Forecast
Astronomy
May. 24, 2012 Rise Set
Actual Time 5:52 AM PDT 8:17 PM PDT
Civil Twilight 5:22 AM PDT 8:47 PM PDT
Nautical Twilight 4:45 AM PDT 9:24 PM PDT
Astronomical Twilight 4:05 AM PDT 10:05 PM PDT
Moon 8:57 AM PDT (5/24) 11:23 PM PDT (5/24)
Length Of Visible Light 15h 25m
Length of Day
14h 25m
Tomorrow will be 1m 18s longer.
Waxing Crescent, 16% of the Moon is Illuminated
Today
Waxing Crescent
May 28
First Quarter
Jun 4
Full
Jun 11
Last Quarter
Jun 19
New
Visit Astronomy
Yesterday'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
Forestdale Creek 1 in 8029 ft
Leavitt Lake 18 in 9400 ft
Ebbetts Pass 0 in 8700 ft
Sonora Pass 0 in 8800 ft
Snow Depth Reports — Snow Depth Map
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Travel Planning
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Nearby Events
Event Date Forecast
The Beth Custer Ensemble 8:00 PM PDT 2012-05-25 Thunderstorm, 57°F
Stanford Cardinal vs. California Golden Bears 5:00 PM PDT 2012-05-25 Thunderstorm, 63°F
Alison Krauss and Union Station 7:00 PM PDT 2012-05-25 Thunderstorm, 59°F
Downtown Santa Cruz Food Tours for March - November 2012 2:00 PM PDT 2012-05-25 Thunderstorm, 59°F
Cinderella 10:00 AM PDT 2012-05-25 Chance of Rain, 54°F
Cinderella 7:00 PM PDT 2012-05-25 Thunderstorm, 59°F
Event data courtesy eviesays.com
Aviation
City Temp. Conditions Updated
Moffett NAS 54 °F Clear 10:56 PM PDT
San Jose 54 °F Partly Cloudy 10:53 PM PDT
Palo Alto 55 °F Partly Cloudy 8:47 PM PDT
San Jose Reid 55 °F Partly Cloudy 9:47 PM PDT
View all Aviation Tools
Flight To ETA Status
JBU471
Boston, MA 		KSJC 09:02PM On Time
DAL2279
Minneapolis, MN 		KSJC 09:05PM On Time
SWA482
Los Angeles, CA 		KSJC 09:10PM On Time
SWA814
Seattle, WA 		KSJC 09:12PM On Time
Flight Tracker by FlightAware FlightAware
View U.S. Airport Delays
Type Condition
Flight Rule: VFR (KNUQ)
Wind Speed: 5.0 kts.
Wind Dir: 135° (SE)
Ceiling: Unlimited

METAR KNUQ 250556Z AUTO VRB05KT 10SM CLR 12/04 A2981 RMK AO2 SLP097 T01220039 10194 20122 51009 TSNO

View all Reports & Maps
Sports
Event Date Forecast
Twins vs. White Sox 7:10 PM CDT on May 24, 2012 Partly Cloudy, 86 °F
Phillies vs. Cardinals 7:15 PM CDT on May 24, 2012 Clear, 86 °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
Los Angeles vs. San Jose 7:00 PM PDT on June 30, 2012 Average High 81° F/ 27° C
Real Salt Lake vs. San Jose 7:30 PM PDT on July 14, 2012 Average High 84° F/ 28° 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
Monta Vista, Cupertino, CA 49.5 °F 50 °F 38 °F 65% SE  at  0.0 mph 0.00 in / hr 387 ft 11:14 PM PDT Normal  
Monta Vista, Cupertino, CA 52.3 °F - 40 °F 63% West  at  0.0 mph 0.00 in / hr 300 ft 11:17 PM PDT Rapid Fire  
Monta Vista, Cupertino, CA 51.4 °F - 37 °F 57% West  at  0.0 mph 0.00 in / hr 300 ft 11:15 PM PDT Normal
Monta Vista North, Cupertino, CA 53.0 °F - 33 °F 47% North  at  0.0 mph 0.00 in / hr 340 ft 11:18 PM PDT Normal  
Sunnyvale, Sunnyvale, CA 52.4 °F - 39 °F 60% NNE  at  0.0 mph 0.00 in / hr 330 ft 11:07 PM PDT Normal  
SW Sunnyvale, Sunnyvale, CA 52.9 °F - 40 °F 62% WNW  at  3.0 mph - / hr 500 ft 11:02 PM PDT Normal  
Homestead/Kennewick, Sunnyvale, CA 50.5 °F - 34 °F 53% NNW  at  3.0 mph 0.00 in / hr 225 ft 11:18 PM PDT Rapid Fire  
MotherShip, Mariani Orchard, Cupertino, CA 52.5 °F - 39 °F 60% South  at  0.0 mph 0.00 in / hr 232 ft 11:18 PM PDT Rapid Fire  
Saratoga, Saratoga, CA 51.0 °F - 41 °F 68% West  at  8.0 mph 0.00 in / hr 403 ft 11:18 PM PDT Rapid Fire  
Scotland Dr. near Glasgow Dr., Saratoga, CA 51.0 °F - 40 °F 66% WSW  at  0.0 mph 0.00 in / hr 375 ft 11:18 PM PDT Rapid Fire
APRSWXNET Los Altos CA , Los Altos, CA 55 °F - 40 °F 57% ESE  at  0 mph 0.00 in / hr 217 ft 9:30 PM PDT MADIS
Ortega Park, Sunnyvale, CA 52.5 °F - 35 °F 51% WSW  at  1.6 mph 0.00 in / hr 118 ft 11:18 PM PDT Rapid Fire  
APRSWXNET Saratoga CA , San Jose, CA 52 °F - 39 °F 62% NNW  at  0 mph 0.00 in / hr 286 ft 11:00 PM PDT MADIS
APRSWXNET Sunnyvale CA , Sunnyvale, CA 55 °F - 38 °F 52% NNW  at  0 mph 0.00 in / hr 127 ft 10:50 PM PDT MADIS
Birdland-Raynor, Sunnyvale, CA 52.5 °F - 38 °F 57% WSW  at  0.0 mph 0.00 in / hr 180 ft 11:18 PM PDT Rapid Fire  
Loyola Corners, Los Altos, CA 52.1 °F - 41 °F 65% West  at  2.0 mph 0.00 in / hr 157 ft 11:18 PM PDT Rapid Fire  
Los Altos Country Club, Los Altos, CA 51.8 °F - 42 °F 70% SSE  at  0.0 mph - / hr 292 ft 11:12 PM PDT Normal  
APRSWXNET Saratoga CA , Saratoga, CA 56 °F - 39 °F 52% SW  at  4 mph 0.00 in / hr 656 ft 8:10 PM PDT MADIS
Purdue Drive, Saratoga, CA 52.0 °F - 40 °F 63% NW  at  0.0 mph 0.00 in / hr 242 ft 11:18 PM PDT Rapid Fire  
Saratoga Ave./Doyle Rd., San Jose, CA 54.0 °F - 37 °F 52% North  at  0.0 mph 0.00 in / hr 190 ft 11:16 PM PDT Normal  
Saratoga Hills, Saratoga, CA 52.2 °F - 37 °F 46% SW  at  0.0 mph 0.00 in / hr 1456 ft 11:08 PM PDT Normal  
Near Westmont HS, San Jose, CA 53.0 °F - 41 °F 64% West  at  0.0 mph - / hr 260 ft 11:12 PM PDT Normal  
Sunnyvale - Jasmine, Sunnyvale, CA 53.7 °F - - 73% NW  at  0.0 mph 0.00 in / hr 70 ft 11:17 PM PDT Normal  
APRSWXNET Santa Clara CA , Santa Clara, CA 54 °F - 38 °F 55% NNW  at  0 mph 0.00 in / hr 137 ft 10:43 PM PDT MADIS
APRSWXNET Santa Clara CA , Santa Clara, CA 52 °F - 39 °F 62% NW  at  0 mph 0.00 in / hr 116 ft 10:40 PM PDT MADIS
Cuesta Park, Mountain View, Mountain View, CA 55.9 °F - 37 °F 48% ESE  at  2.0 mph 0.00 in / hr 104 ft 11:18 PM PDT Rapid Fire  
Los Altos Hills, Los Altos Hills, CA 50.3 °F - 40 °F 67% SW  at  1.0 mph 0.00 in / hr 650 ft 11:18 PM PDT Rapid Fire  
Foothill College, Los Altos Hills, CA 52.3 °F - 39 °F 61% NW  at  3.1 mph 0.00 in / hr 361 ft 10:10 PM PDT Normal
Los Altos, CA 53.0 °F - 40 °F 60% NNW  at  0.0 mph 0.00 in / hr 100 ft 11:15 PM PDT Normal  
Santa Clara, CA 53.2 °F - 41 °F 63% West  at  6.0 mph 0.00 in / hr 12 ft 11:18 PM PDT Rapid Fire  
RAWS LOS ALTOS CA, Los Altos, CA 52 °F - 35 °F 53% WNW  at  6 mph 0.00 in / hr 539 ft 10:10 PM PDT MADIS
Santa Clara - Lawrence & Monroe, Santa Clara, CA 53.6 °F - 41 °F 63% West  at  5.0 mph 0.00 in / hr 88 ft 11:18 PM PDT Rapid Fire  
Los Gatos, CA 52.3 °F - 39 °F 62% West  at  2.2 mph 0.00 in / hr 300 ft 11:18 PM PDT Rapid Fire  
San Thomas/Hamilton, San Jose, CA 52.2 °F - 37 °F 56% North  at  0.0 mph 0.00 in / hr 180 ft 11:15 PM PDT Normal
Sunnyvale, Sunnyvale, CA 52.5 °F - 34 °F 49% NE  at  0.0 mph 0.00 in / hr 60 ft 11:18 PM PDT Rapid Fire  
Walden West, Saratoga, CA 49.6 °F 47 °F 32 °F 52% WNW  at  6.0 mph 0.00 in / hr 1996 ft 10:40 PM PDT Normal
Saratoga hills, Saratoga, CA 44.1 °F 39 °F 30 °F 57% NW  at  9.0 mph 0.00 in / hr 2500 ft 11:17 PM PDT Rapid Fire  
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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