Discovery Bay, CA

11:31 PM PDT on May 24, 2012 (GMT -0700)
Elev: 20 ft
Lon: 121.6° W
Lat: 37.9° N
Source
Rapid Fire Updates™
 Updated 11:30 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

Discovery Bay Weather at a Glance

Updated 11:30 PM PDT
Weather Station - report
Mr. Big's WX, Brentwood
Elevation
29 ft
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Now
Clear
Clear
Temperature
56.9 °F
Feels Like 56.9 °F
Wind(mph)
11.0
Sunrise / Set
5:49 AM
8:17 PM
Moon
Waxing Crescent
Tonight
Clear 50 °F
Clear
Tomorrow
Thunderstorm 68 °F
T-storms
20% chance of precipitation
Tomorrow Night
Thunderstorm 52 °F
T-storms
20% chance of precipitation
Saturday
Partly Cloudy 73 | 54 °F
Partly Cloudy
Sunday
Partly Cloudy 77 | 50 °F
Partly Cloudy
Monday
Clear 72 | 48 °F
Clear
Tomorrow is forecast to be Much Cooler than today.
Conditions
Pressure
29.74 in
Visibility
10.0 miles
Clouds
Clear -
Moisture
Humidity
56%
Rainfall
0.00 in
Snow Depth
Not available.
METAR
METAR KLVK 250553Z AUTO 20011KT 10SM CLR 11/07 A2975 RMK AO2 SLP070 T01110072 10211 20111 51007
Don't speak METAR? Read our FAQ.
Weather Radio
Launch Weather Radio
Temperature
Temperature
56.9 °F
Dew Point
41 °F
Wind
Speed / Dir
11.0 mph from West
Wind Gust
14.0 mph
Health
UV
0 out of 16
Pollen
6.40 out of 12
Pollen Forecast
Ozone
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 50F. Breezy. Winds from the West at 20 to 25 mph with gusts to 30 mph. Chance of rain 20%.
Friday
tstorms Mostly cloudy with thunderstorms and a chance of rain. High of 68F. Breezy. Winds from the WNW at 15 to 20 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 52F. Winds from the WSW at 5 to 15 mph. Chance of rain 20%.
Saturday
partlycloudy Partly cloudy in the morning, then clear. High of 73F. Winds from the SW at 5 to 15 mph.
Saturday Night
nt_partlycloudy Partly cloudy. Low of 54F. Winds from the WSW at 5 to 15 mph.
Sunday
partlycloudy Partly cloudy in the morning, then clear. High of 77F. Winds from the West at 5 to 15 mph.
Sunday Night
nt_clear Clear. Low of 50F. Winds from the WSW at 5 to 10 mph.
Monday
clear Clear. High of 72F. Winds from the West at 5 to 10 mph.
Monday Night
nt_clear Clear. Low of 48F. Winds from the WSW at 5 to 10 mph.
Tuesday
clear Clear. High of 77F. Winds from the West at 5 to 10 mph.
Tuesday Night
nt_clear Clear. Low of 54F. Winds from the WSW at 5 to 10 mph.
Wednesday
partlycloudy Clear. High of 81F. Winds from the WNW at 5 to 10 mph.
Wednesday Night
nt_clear Clear. Low of 61F. Winds from the WSW at 5 to 10 mph.
Thursday
clear Clear. High of 90F. Winds from the West at 5 to 15 mph.
Thursday Night
nt_clear Clear. Low of 57F. Winds from the WSW at 5 to 15 mph.
Friday
clear Clear. High of 86F. Winds from the West at 5 to 15 mph.
Friday Night
nt_clear Partly cloudy. Low of 57F. Winds from the WSW at 5 to 10 mph.
Saturday
clear Clear. High of 82F. Winds from the West at 5 to 15 mph.
Saturday Night
nt_clear Partly cloudy. Low of 55F. Winds from the West at 5 to 15 mph.
Sunday
partlycloudy Partly cloudy. High of 81F. Winds from the WNW at 5 to 15 mph.
Sunday Night
nt_clear Clear. Low of 54F. Winds from the West at 5 to 15 mph.
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Forecast

View Calendar 10-Day Forecast for station KCABRENT7

Friday, 25
Thunderstorm
68 | 52 °F
T-storms
Chance of
Precipitation
20%
Saturday, 26
Partly Cloudy
73 | 54 °F
Partly Cloudy
Chance of
Precipitation
0%
Sunday, 27
Partly Cloudy
77 | 50 °F
Partly Cloudy
Chance of
Precipitation
0%
Monday, 28
Clear
72 | 48 °F
Clear
Chance of
Precipitation
0%
Tuesday, 29
Clear
77 | 54 °F
Clear
Chance of
Precipitation
0%
Wednesday, 30
Partly Cloudy
81 | 61 °F
Partly Cloudy
Chance of
Precipitation
0%
Thursday, 31
Clear
90 | 57 °F
Clear
Chance of
Precipitation
0%
Friday, 1
Clear
86 | 57 °F
Clear
Chance of
Precipitation
0%
Saturday, 2
Clear
82 | 55 °F
Clear
Chance of
Precipitation
0%
Sunday, 3
Partly Cloudy
81 | 54 °F
Partly Cloudy
Chance of
Precipitation
0%
Source: BestForecast at 7:14 PM PDT on May 24, 2012
Descriptive Forecast
Friday
tstorms Mostly cloudy with thunderstorms and a chance of rain. High of 68F. Breezy. Winds from the WNW at 15 to 20 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 52F. Winds from the WSW at 5 to 15 mph. Chance of rain 20%.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 56 | 41 65 | 39 67 | 41 60 | 47
Wind 18 mph West 12 mph WNW 14 mph WNW 9 mph West
Humidity 57% 39% 38% 61%
Chance of Precip. 20% 20% 20% 10%
Cloud Cover 61% 77% 80% 33%
Conditions Chance of Rain Thunderstorm Thunderstorm Partly Cloudy
Sunrise & Sunset
5:49 AM
8:17 PM
The quality of the forecasted high temperature for this day is good. MaxT RMSE [1.95], Average RMSE [2.26]
The National Weather Service forecast quality is good. MaxT RMSE [1.99], Average RMSE [2.83] : Use NWS
Source: BestForecast at 7:14 PM PDT on May 24, 2012
Descriptive Forecast
Saturday
partlycloudy Partly cloudy in the morning, then clear. High of 73F. Winds from the SW at 5 to 15 mph.
Saturday Night
nt_partlycloudy Partly cloudy. Low of 54F. Winds from the WSW at 5 to 15 mph.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 57 | 48 71 | 47 71 | 49 58 | 49
Wind 7 mph SW 8 mph SW 13 mph WSW 8 mph WSW
Humidity 73% 43% 46% 70%
Chance of Precip. 10% 10% 0% 0%
Cloud Cover 47% 4% 20% 29%
Conditions Partly Cloudy Clear Clear Partly Cloudy
Sunrise & Sunset
5:48 AM
8:18 PM
The quality of the forecasted high temperature for this day is good. MaxT RMSE [2.43], Average RMSE [2.06]
The National Weather Service forecast quality is good. MaxT RMSE [2.21], Average RMSE [3.11] : 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 77F. Winds from the West at 5 to 15 mph.
Sunday Night
nt_clear Clear. Low of 50F. Winds from the WSW at 5 to 10 mph.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 57 | 47 72 | 53 72 | 43 59 | 49
Wind 6 mph WSW 7 mph WNW 12 mph West 8 mph WSW
Humidity 70% 49% 34% 68%
Chance of Precip. 0% 0% 0% 0%
Cloud Cover 47% 10% 14% 0%
Conditions Partly Cloudy Clear Clear Clear
Sunrise & Sunset
5:48 AM
8:19 PM
The quality of the forecasted high temperature for this day is fair. MaxT RMSE [2.66], Average RMSE [2.03]
The National Weather Service forecast quality is fair. MaxT RMSE [2.63], Average RMSE [3.12] : Use NWS
Source: BestForecast at 7:14 PM PDT on May 24, 2012
Descriptive Forecast
Monday
clear Clear. High of 72F. Winds from the West at 5 to 10 mph.
Monday Night
nt_clear Clear. Low of 48F. Winds from the WSW at 5 to 10 mph.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 56 | 50 71 | 50 67 | 41 57 | 46
Wind 6 mph WSW 7 mph West 10 mph WSW 7 mph WSW
Humidity 79% 48% 39% 69%
Chance of Precip. 0% 0% 0% 0%
Cloud Cover 7% 0% 0% 0%
Conditions Clear Clear Clear Clear
Sunrise & Sunset
5:47 AM
8:19 PM
The quality of the forecasted high temperature for this day is fair. MaxT RMSE [2.74], Average RMSE [2.60]
The National Weather Service forecast quality is fair. MaxT RMSE [2.83], Average RMSE [3.36] : Use NWS
Source: BestForecast at 7:14 PM PDT on May 24, 2012
Descriptive Forecast
Tuesday
clear Clear. High of 77F. Winds from the West at 5 to 10 mph.
Tuesday 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 55 | 47 72 | 47 72 | 42 57 | 48
Wind 5 mph WSW 4 mph WNW 9 mph West 7 mph WSW
Humidity 72% 41% 34% 71%
Chance of Precip. 0% 0% 0% 0%
Cloud Cover 0% 0% 0% 0%
Conditions Clear Clear Clear Clear
Sunrise & Sunset
5:47 AM
8:20 PM
The quality of the forecasted high temperature for this day is fair. MaxT RMSE [3.03], Average RMSE [3.27]
The National Weather Service forecast quality is poor. MaxT RMSE [3.53], Average RMSE [3.59] : Use NWS
Source: BestForecast at 7:14 PM PDT on May 24, 2012
Descriptive Forecast
Wednesday
partlycloudy Clear. High of 81F. Winds from the WNW at 5 to 10 mph.
Wednesday Night
nt_clear Clear. Low of 61F. Winds from the WSW at 5 to 10 mph.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 58 | 47 75 | 47 80 | 47 63 | 47
Wind 5 mph WSW 5 mph NW 9 mph West 7 mph WSW
Humidity 66% 37% 31% 55%
Chance of Precip. 0% 0% 0% 0%
Cloud Cover 90% 2% 0% 0%
Conditions Overcast Clear Clear Clear
Sunrise & Sunset
5:47 AM
8:20 PM
The quality of the forecasted high temperature for this day is poor. MaxT RMSE [4.67], Average RMSE [3.86]
The National Weather Service forecast quality is poor. MaxT RMSE [4.24], Average RMSE [3.81] : Use NWS
Source: BestForecast at 7:14 PM PDT on May 24, 2012
Descriptive Forecast
Thursday
clear Clear. High of 90F. Winds from the West at 5 to 15 mph.
Thursday Night
nt_clear Clear. Low of 57F. Winds from the WSW at 5 to 15 mph.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 63 | 50 79 | 51 86 | 57 64 | 46
Wind 5 mph WSW 5 mph West 11 mph WSW 8 mph WSW
Humidity 60% 36% 35% 51%
Chance of Precip. 0% 0% 0% 0%
Cloud Cover 0% 0% 0% 0%
Conditions Clear Clear Clear Clear
Sunrise & Sunset
5:47 AM
8:20 PM
The quality of the forecasted high temperature for this day is poor. MaxT RMSE [4.81], Average RMSE [4.26]
Source: BestForecast at 7:14 PM PDT on May 24, 2012
Descriptive Forecast
Friday
clear Clear. High of 86F. Winds from the West at 5 to 15 mph.
Friday Night
nt_clear Partly cloudy. Low of 57F. Winds from the WSW at 5 to 10 mph.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 63 | 52 79 | 54 82 | 55 66 | 54
Wind 6 mph WSW 5 mph West 10 mph West 8 mph West
Humidity 66% 40% 39% 64%
Chance of Precip. 0% 10% 10% 10%
Cloud Cover 0% 3% 6% 11%
Conditions Clear Clear Clear Clear
Sunrise & Sunset
5:47 AM
8:20 PM
The quality of the forecasted high temperature for this day is poor. MaxT RMSE [4.43], Average RMSE [3.44]
Source: BestForecast at 7:14 PM PDT on May 24, 2012
Descriptive Forecast
Saturday
clear Clear. High of 82F. Winds from the West at 5 to 15 mph.
Saturday Night
nt_clear Partly cloudy. Low of 55F. Winds from the West at 5 to 15 mph.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 64 | 60 76 | 67 76 | 62 62 | 56
Wind 6 mph WSW 6 mph West 11 mph West 7 mph West
Humidity 84% 70% 61% 77%
Chance of Precip. 10% 10% 10% 10%
Cloud Cover 15% 9% 4% 20%
Conditions Clear Clear Clear Clear
Sunrise & Sunset
5:47 AM
8:20 PM
The quality of the forecasted high temperature for this day is poor. MaxT RMSE [4.59], Average RMSE [3.36]
Source: BestForecast at 7:14 PM PDT on May 24, 2012
Descriptive Forecast
Sunday
partlycloudy Partly cloudy. High of 81F. Winds from the WNW at 5 to 15 mph.
Sunday Night
nt_clear Clear. Low of 54F. Winds from the West at 5 to 15 mph.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 61 | 57 74 | 61 77 | 55 62 | 48
Wind 5 mph WSW 7 mph WNW 12 mph WNW 8 mph West
Humidity 86% 62% 45% 58%
Chance of Precip. 10% 10% 10% 0%
Cloud Cover 36% 22% 7% 4%
Conditions Partly Cloudy Clear Clear Clear
Sunrise & Sunset
5:47 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 61 | 51 75 | 55 78 | 51 63 | 45
Wind 5 mph West 6 mph WNW 11 mph WNW 7 mph West
Humidity 67% 49% 37% 51%
Chance of Precip. 0% 0% 0% 0%
Cloud Cover 1% % % %
Conditions Clear Clear Clear Clear
Sunrise & Sunset
5:47 AM
8:20 PM
Scientific Forecaster Discussion — MOS Weather Graph
Nearby
History & Almanac
May 25, 2012 Max Temp Min Temp
Normal (KLVK) 76 °F 51 °F
Record (KLVK) 98 °F (1982) 40 °F (1945)
Yesterday 75 °F 52 °F
Yesterday's Heating Degree Days: 1
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
Current Good
OZONE
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
Richmond, CA 59.0 °F
Port Chicago, CA 64.0 °F
Marine Forecast
Astronomy
May. 24, 2012 Rise Set
Actual Time 5:49 AM PDT 8:17 PM PDT
Civil Twilight 5:19 AM PDT 8:47 PM PDT
Nautical Twilight 4:41 AM PDT 9:25 PM PDT
Astronomical Twilight 4:00 AM PDT 10:07 PM PDT
Moon 8:53 AM PDT (5/24) 11:22 PM PDT (5/24)
Length Of Visible Light 15h 28m
Length of Day
14h 28m
Tomorrow will be 1m 20s 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
Carson Pass 0 in 8500 ft
Forestdale Creek 1 in 8029 ft
Ebbetts Pass 0 in 8700 ft
Burnside Lake 1 in 8139 ft
Snow Depth Reports — Snow Depth Map
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Travel Planning
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Nearby Events
Event Date Forecast
No events within 10 mi of location. View all events.
Event data courtesy eviesays.com
Aviation
City Temp. Conditions Updated
Livermore 52 °F Clear 10:53 PM PDT
Stockton 55 °F Blowing Widespread Dust 10:55 PM PDT
Concord 54 °F Clear 10:53 PM PDT
Fairfield 58 °F Clear 10:55 PM PDT
View all Aviation Tools
Flight To ETA Status
No flights were found.
Flight Tracker by FlightAware FlightAware
View U.S. Airport Delays
Type Condition
Flight Rule: VFR (KLVK)
Wind Speed: 11.0 kts.
Wind Dir: 269° (West)
Ceiling: Unlimited

METAR KLVK 250553Z AUTO 20011KT 10SM CLR 11/07 A2975 RMK AO2 SLP070 T01110072 10211 20111 51007

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
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
Mr. Big's WX, Brentwood, CA 56.9 °F - 41 °F 56% West  at  11.0 mph 0.00 in / hr 29 ft 11:30 PM PDT Normal  
Brentwood Hills-live since '07, Brentwood, CA 55.3 °F - 40 °F 56% West  at  4.0 mph 0.00 in / hr 23 ft 11:31 PM PDT Rapid Fire
MesoWest Bethel Island Road , Bethel Island, CA 58 °F - 39 °F 48% West  at  17 mph 0.00 in / hr 20 ft 10:00 PM PDT MADIS
Rose Garden, Brentwood, CA 61.9 °F - 40 °F 44% WSW  at  7.2 mph 0.00 in / hr 85 ft 9:10 PM PDT Rapid Fire  
Big Lukes Roof Top Weather, Oakley, CA 57.0 °F - 40 °F 53% SW  at  6.9 mph 0.00 in / hr 30 ft 11:31 PM PDT Rapid Fire
Shadow Lakes, Brentwood, CA 62.7 °F - 39 °F 41% WSW  at  7.0 mph 0.00 in / hr 280 ft 8:33 PM PDT Normal  
APRSWXNET Brentwood CA , Brentwood, CA 56 °F - 40 °F 54% WSW  at  8 mph 0.00 in / hr 203 ft 11:04 PM PDT MADIS
Creston Park, Mountain House, CA 53.4 °F - 42 °F 65% South  at  2.7 mph 0.00 in / hr 56 ft 11:31 PM PDT Rapid Fire  
W6ONV, Oakley, CA 56.5 °F - 40 °F 54% West  at  13.0 mph 0.00 in / hr 10 ft 11:31 PM PDT Rapid Fire
APRSWXNET Antioch CA , Antioch, CA 57 °F - 38 °F 48% SW  at  2 mph 0.00 in / hr 243 ft 11:01 PM PDT MADIS
Ridgerock, Antioch, CA 55.3 °F - 41 °F 58% WSW  at  12.0 mph 0.00 in / hr 136 ft 11:31 PM PDT Rapid Fire  
Randy's Antioch Weather Station, Antioch, CA 55.7 °F - 37 °F 50% WNW  at  14.0 mph 0.00 in / hr 89 ft 11:30 PM PDT Normal
EBRC Field, Livermore, CA 50.2 °F - 20 °F 30% SW  at  14.3 mph 0.00 in / hr 645 ft 11:30 PM PDT Normal
Tracy, CA/ Redbridge area, Tracy, CA 55.2 °F - 41 °F 59% West  at  8.0 mph - / hr 168 ft 11:28 PM PDT Normal
Country Club, Stockton, CA 59.7 °F - 36 °F 41% ENE  at  0.0 mph - / hr 10 ft 11:30 PM PDT Rapid Fire  
MacArthur/Schulte, Tracy, CA 55.7 °F - 41 °F 58% WSW  at  10.0 mph 0.00 in / hr 69 ft 11:30 PM PDT Rapid Fire  
APRSWXNET Stockton CA , Stockton, CA 58 °F - 42 °F 55% SW  at  0 mph 0.00 in / hr 10 ft 11:00 PM PDT MADIS
The Landing, Stockton, CA 56.5 °F - 42 °F 59% WNW  at  0.9 mph - / hr 7 ft 11:30 PM PDT Rapid Fire
Silver Oaks, Stockton, CA 58.6 °F - 44 °F 59% SW  at  7.6 mph 0.00 in / hr 3 ft 11:27 PM PDT Rapid Fire  
Meadow Glen, Tracy, CA 56.6 °F - 39 °F 53% SW  at  10.0 mph 0.00 in / hr 86 ft 11:20 PM PDT Normal
537 Highland St, Livermore, CA 50.0 °F - 47 °F 89% SSW  at  2.7 mph - / hr 571 ft 11:28 PM PDT Normal  
APRSWXNET Tracy CA , Tracy, CA 58 °F - 39 °F 49% SW  at  7 mph 0.00 in / hr 101 ft 10:58 PM PDT MADIS
Mossdale Landing - North, Lathrop, CA 54.6 °F - 45 °F 69% SW  at  4.0 mph 0.00 in / hr 20 ft 11:30 PM PDT Normal  
Mossdale Landing - West, Lathrop, CA 54.6 °F - 44 °F 66% SSW  at  6.0 mph 0.00 in / hr 17 ft 11:30 PM PDT Rapid Fire  
APRSWXNET Stockton CA , Stockton, CA 58 °F - 42 °F 55% WNW  at  9 mph 0.00 in / hr 41 ft 10:56 PM PDT MADIS
HADS STOCKTON 3NNW FIRE STATION #4 CA, Stockton, CA - - - - North  at  - 0.00 in / hr 12 ft 10:00 PM PDT MADIS
Livermore, CA 50.0 °F 47 °F 44 °F 80% SW  at  7.8 mph 0.00 in / hr 571 ft 11:31 PM PDT Rapid Fire  
580 at Portola, Livermore, CA 51.3 °F - 46 °F 82% SW  at  10.0 mph 0.00 in / hr 480 ft 11:06 PM PDT Normal
RAWS LOS VAQUEROS CA, Livermore, CA 49 °F 42 °F 41 °F 74% SW  at  20 mph 0.00 in / hr 1100 ft 10:45 PM PDT MADIS
RAWS ALTAMONT CA, Livermore, CA 49 °F 39 °F 40 °F 72% WSW  at  43 mph 0.00 in / hr 1436 ft 10:12 PM PDT MADIS
RAWS MALLORY RIDGE CA, Danville, CA 45 °F 38 °F 38 °F 77% West  at  15 mph 0.00 in / hr 1948 ft 11:02 PM PDT MADIS
RAWS BLACK DIAMOND CA, Clayton, CA 49 °F 41 °F 37 °F 64% West  at  28 mph 0.00 in / hr 1600 ft 10:28 PM PDT MADIS
RAWS MT. DIABLO CA, Clayton, CA 40 °F 28 °F 35 °F 83% SE  at  31 mph 0.00 in / hr 3849 ft 10:17 PM PDT MADIS
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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