San Lorenzo, CA

2:59 AM PDT on May 25, 2012 (GMT -0700)
Elev: 20 ft
Lon: 122.1° W
Lat: 37.7° 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

San Lorenzo Weather at a Glance

Updated 2:45 AM PDT
Weather Station - report
San Lorenzo
Elevation
100 ft
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Now
Clear
Clear
Temperature
53.0 °F
Feels Like 53.0 °F
Wind(mph)
5.0
Sunrise / Set
5:51 AM
8:19 PM
Moon
Waxing Crescent
Tonight
Clear 50 °F
Clear
Friday
Thunderstorm 59 °F
T-storms
20% chance of precipitation
Friday Night
Thunderstorm 52 °F
T-storms
20% chance of precipitation
Saturday
Partly Cloudy 63 | 50 °F
Partly Cloudy
Sunday
Partly Cloudy 68 | 52 °F
Partly Cloudy
Monday
Partly Cloudy 61 | 52 °F
Partly Cloudy
Today is forecast to be Cooler than yesterday.
Conditions
Pressure
29.78 in
Visibility
10.0 miles
Clouds
Clear -
Moisture
Humidity
75%
Rainfall
0.00 in
Snow Depth
Not available.
METAR
METAR KHWD 250954Z AUTO 29017G21KT 10SM CLR 11/06 A2975 RMK AO2 SLP083 T01060056
Don't speak METAR? Read our FAQ.
Weather Radio
Launch Weather Radio
Temperature
Temperature
53.0 °F
Dew Point
45 °F
Wind
Speed / Dir
5.0 mph from SW
Wind Gust
16.0 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
Friday
tstorms Overcast with thunderstorms and a chance of rain. High of 59F. Breezy. Winds from the WNW at 15 to 25 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 10 mph. Chance of rain 20%.
Saturday
partlycloudy Overcast in the morning, then partly cloudy. High of 63F. Breezy. Winds from the West at 15 to 20 mph.
Saturday Night
nt_partlycloudy Partly cloudy in the evening, then overcast. Low of 50F. Winds from the WSW at 5 to 20 mph.
Sunday
partlycloudy Overcast in the morning, then clear. High of 68F. Winds from the West at 10 to 15 mph.
Sunday Night
nt_partlycloudy Partly cloudy in the evening, then mostly cloudy. Fog overnight. Low of 52F. Winds from the West at 5 to 10 mph.
Monday
partlycloudy Overcast in the morning, then clear. High of 61F. Winds from the West at 5 to 15 mph.
Monday Night
nt_partlycloudy Partly cloudy. Fog overnight. Low of 52F. Winds from the West at 5 to 10 mph.
Tuesday
partlycloudy Mostly cloudy in the morning, then clear. High of 61F. Winds from the West at 5 to 10 mph.
Tuesday Night
nt_partlycloudy Partly cloudy. Fog overnight. Low of 50F. Winds from the West at 5 to 10 mph.
Wednesday
partlycloudy Partly cloudy. High of 68F. Winds from the West at 5 to 10 mph.
Wednesday Night
nt_partlycloudy Partly cloudy. Low of 55F. Winds less than 5 mph.
Thursday
partlycloudy Partly cloudy. High of 73F. Winds from the West at 5 to 10 mph.
Thursday Night
nt_partlycloudy Partly cloudy. Low of 54F. Winds from the WSW at 5 to 10 mph.
Friday
partlycloudy Partly cloudy. High of 72F. Winds from the WSW at 5 to 10 mph.
Friday Night
nt_partlycloudy Partly cloudy. Low of 55F. Winds from the West at 5 to 15 mph.
Saturday
partlycloudy Partly cloudy. High of 68F. Winds from the West at 5 to 15 mph.
Saturday Night
nt_partlycloudy Partly cloudy. Low of 50F. Winds from the West at 5 to 15 mph.
Sunday
clear Clear. High of 68F. 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.
Monday
clear Clear. High of 68F. Winds from the WNW at 5 to 15 mph.
Monday Night
nt_clear Clear. Low of 50F. Winds from the West at 5 to 15 mph.
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Forecast

View Calendar 10-Day Forecast for station KHWD

Friday, 25
Thunderstorm
59 | 52 °F
T-storms
Chance of
Precipitation
20%
Saturday, 26
Partly Cloudy
63 | 50 °F
Partly Cloudy
Chance of
Precipitation
10%
Sunday, 27
Partly Cloudy
68 | 52 °F
Partly Cloudy
Chance of
Precipitation
0%
Monday, 28
Partly Cloudy
61 | 52 °F
Partly Cloudy
Chance of
Precipitation
0%
Tuesday, 29
Partly Cloudy
61 | 50 °F
Partly Cloudy
Chance of
Precipitation
0%
Wednesday, 30
Partly Cloudy
68 | 55 °F
Partly Cloudy
Chance of
Precipitation
0%
Thursday, 31
Partly Cloudy
73 | 54 °F
Partly Cloudy
Chance of
Precipitation
0%
Friday, 1
Partly Cloudy
72 | 55 °F
Partly Cloudy
Chance of
Precipitation
0%
Saturday, 2
Partly Cloudy
68 | 50 °F
Partly Cloudy
Chance of
Precipitation
0%
Sunday, 3
Clear
68 | 50 °F
Clear
Chance of
Precipitation
0%
Source: BestForecast at 1:01 AM PDT on May 25, 2012
Descriptive Forecast
Friday
tstorms Overcast with thunderstorms and a chance of rain. High of 59F. Breezy. Winds from the WNW at 15 to 25 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 10 mph. Chance of rain 20%.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 53 | 45 56 | 42 56 | 46 55 | 49
Wind 14 mph WNW 19 mph West 16 mph West 8 mph WSW
Humidity 74% 56% 67% 81%
Chance of Precip. 20% 20% 20% 10%
Cloud Cover 56% 90% 76% 69%
Conditions Chance of Rain Thunderstorm Thunderstorm Mostly Cloudy
Sunrise & Sunset
5:51 AM
8:19 PM
The quality of the forecasted high temperature for this day is good. MaxT RMSE [2.11], Average RMSE [2.42]
The National Weather Service forecast quality is fair. MaxT RMSE [2.56], Average RMSE [1.63] : Use NWS
Source: BestForecast at 1:01 AM PDT on May 25, 2012
Descriptive Forecast
Saturday
partlycloudy Overcast in the morning, then partly cloudy. High of 63F. Breezy. Winds from the West at 15 to 20 mph.
Saturday Night
nt_partlycloudy Partly cloudy in the evening, then overcast. Low of 50F. Winds from the WSW at 5 to 20 mph.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 53 | 48 56 | 47 56 | 46 53 | 49
Wind 7 mph SW 15 mph West 16 mph West 7 mph SW
Humidity 86% 71% 72% 88%
Chance of Precip. 10% 10% 0% 10%
Cloud Cover 52% 100% 43% 17%
Conditions Partly Cloudy Overcast Partly Cloudy Clear
Sunrise & Sunset
5:50 AM
8:20 PM
The quality of the forecasted high temperature for this day is good. MaxT RMSE [2.48], Average RMSE [1.55]
The National Weather Service forecast quality is fair. MaxT RMSE [2.62], Average RMSE [1.68] : Use NWS
Source: BestForecast at 1:01 AM PDT on May 25, 2012
Descriptive Forecast
Sunday
partlycloudy Overcast in the morning, then clear. High of 68F. Winds from the West at 10 to 15 mph.
Sunday Night
nt_partlycloudy Partly cloudy in the evening, then mostly cloudy. Fog overnight. Low of 52F. Winds from the West at 5 to 10 mph.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 53 | 49 63 | 49 62 | 48 54 | 51
Wind 5 mph SW 13 mph West 12 mph West 6 mph West
Humidity 86% 63% 63% 89%
Chance of Precip. 10% 0% 0% 0%
Cloud Cover 100% 59% 9% 3%
Conditions Overcast Partly Cloudy Clear Fog
Sunrise & Sunset
5:50 AM
8:21 PM
The quality of the forecasted high temperature for this day is fair. MaxT RMSE [2.82], Average RMSE [2.58]
The National Weather Service forecast quality is fair. MaxT RMSE [2.51], Average RMSE [1.77] : Use NWS
Source: BestForecast at 1:01 AM PDT on May 25, 2012
Descriptive Forecast
Monday
partlycloudy Overcast in the morning, then clear. High of 61F. Winds from the West at 5 to 15 mph.
Monday Night
nt_partlycloudy Partly cloudy. Fog overnight. Low of 52F. Winds from the West at 5 to 10 mph.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 53 | 49 60 | 49 57 | 46 53 | 51
Wind 6 mph West 9 mph West 10 mph West 5 mph West
Humidity 90% 68% 66% 92%
Chance of Precip. 10% 0% 0% 0%
Cloud Cover 88% 61% 3% 24%
Conditions Fog Partly Cloudy Clear Clear
Sunrise & Sunset
5:49 AM
8:22 PM
The quality of the forecasted high temperature for this day is poor. MaxT RMSE [3.88], Average RMSE [2.48]
The National Weather Service forecast quality is fair. MaxT RMSE [3.10], Average RMSE [2.12] : Use NWS
Source: BestForecast at 1:01 AM PDT on May 25, 2012
Descriptive Forecast
Tuesday
partlycloudy Mostly cloudy in the morning, then clear. High of 61F. Winds from the West at 5 to 10 mph.
Tuesday Night
nt_partlycloudy Partly cloudy. Fog overnight. Low of 50F. Winds from the West at 5 to 10 mph.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 53 | 49 60 | 46 58 | 47 53 | 49
Wind 4 mph West 6 mph West 9 mph West 5 mph West
Humidity 86% 60% 65% 84%
Chance of Precip. 0% 0% 0% 0%
Cloud Cover 46% 28% 0% 16%
Conditions Fog Partly Cloudy Clear Clear
Sunrise & Sunset
5:49 AM
8:22 PM
The quality of the forecasted high temperature for this day is poor. MaxT RMSE [4.10], Average RMSE [2.48]
The National Weather Service forecast quality is poor. MaxT RMSE [3.51], Average RMSE [1.91] : Use NWS
Source: BestForecast at 1:01 AM PDT on May 25, 2012
Descriptive Forecast
Wednesday
partlycloudy Partly cloudy. High of 68F. Winds from the West at 5 to 10 mph.
Wednesday Night
nt_partlycloudy Partly cloudy. Low of 55F. Winds less than 5 mph.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 55 | 51 65 | 50 62 | 49 57 | 52
Wind 4 mph West 6 mph West 9 mph West 5 mph WSW
Humidity 87% 59% 61% 82%
Chance of Precip. 0% 0% 0% 0%
Cloud Cover 39% 35% 4% 37%
Conditions Fog Partly Cloudy Clear Partly Cloudy
Sunrise & Sunset
5:49 AM
8:22 PM
The quality of the forecasted high temperature for this day is poor. MaxT RMSE [5.92], Average RMSE [2.49]
The National Weather Service forecast quality is poor. MaxT RMSE [4.10], Average RMSE [1.88] : Use NWS
Source: BestForecast at 1:01 AM PDT on May 25, 2012
Descriptive Forecast
Thursday
partlycloudy Partly cloudy. High of 73F. Winds from the West at 5 to 10 mph.
Thursday Night
nt_partlycloudy Partly cloudy. Low of 54F. Winds from the WSW at 5 to 10 mph.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 56 | 52 69 | 55 69 | 51 59 | 55
Wind 3 mph SW 5 mph WNW 8 mph West 4 mph WSW
Humidity 85% 60% 53% 86%
Chance of Precip. 0% 0% 0% 0%
Cloud Cover 33% 23% 6% 35%
Conditions Partly Cloudy Clear Clear Partly Cloudy
Sunrise & Sunset
5:49 AM
8:22 PM
The quality of the forecasted high temperature for this day is poor. MaxT RMSE [5.08], Average RMSE [2.56]
Source: BestForecast at 1:01 AM PDT on May 25, 2012
Descriptive Forecast
Friday
partlycloudy Partly cloudy. High of 72F. Winds from the WSW at 5 to 10 mph.
Friday Night
nt_partlycloudy 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 57 | 51 69 | 54 69 | 54 56 | 53
Wind 4 mph WSW 6 mph WSW 10 mph WSW 9 mph West
Humidity 82% 60% 59% 88%
Chance of Precip. 0% 0% 0% 0%
Cloud Cover 45% 42% 13% 20%
Conditions Partly Cloudy Partly Cloudy Clear Clear
Sunrise & Sunset
5:49 AM
8:22 PM
The quality of the forecasted high temperature for this day is poor. MaxT RMSE [4.87], Average RMSE [3.23]
Source: BestForecast at 1:01 AM PDT on May 25, 2012
Descriptive Forecast
Saturday
partlycloudy Partly cloudy. High of 68F. Winds from the West at 5 to 15 mph.
Saturday Night
nt_partlycloudy Partly cloudy. Low of 50F. Winds from the West at 5 to 15 mph.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 56 | 53 65 | 53 64 | 52 54 | 49
Wind 6 mph West 7 mph West 13 mph West 9 mph West
Humidity 86% 64% 65% 82%
Chance of Precip. 0% 0% 0% 0%
Cloud Cover 36% 46% 2% 31%
Conditions Partly Cloudy Partly Cloudy Clear Partly Cloudy
Sunrise & Sunset
5:49 AM
8:22 PM
The quality of the forecasted high temperature for this day is poor. MaxT RMSE [4.89], Average RMSE [2.91]
Source: BestForecast at 1:01 AM PDT on May 25, 2012
Descriptive Forecast
Sunday
clear Clear. High of 68F. 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 63 | 54 66 | 51 53 | 45
Wind 7 mph West 9 mph WNW 15 mph WNW 10 mph WNW
Humidity 86% 69% 57% 70%
Chance of Precip. 0% 0% 0% 10%
Cloud Cover 5% 3% 1% 1%
Conditions Clear Clear Clear Clear
Sunrise & Sunset
5:49 AM
8:22 PM
Source: BestForecast at 1:01 AM PDT on May 25, 2012
Descriptive Forecast
Monday
clear Clear. High of 68F. Winds from the WNW at 5 to 15 mph.
Monday Night
nt_clear Clear. Low of 50F. Winds from the West at 5 to 15 mph.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 52 | 46 64 | 53 66 | 49 53 | 45
Wind 7 mph WNW 8 mph WNW 14 mph WNW 9 mph WNW
Humidity 79% 64% 54% 70%
Chance of Precip. 10% 0% 0% 0%
Cloud Cover 1% 1% 1% %
Conditions Clear Clear Clear Clear
Sunrise & Sunset
5:49 AM
8:22 PM
Scientific Forecaster Discussion — MOS Weather Graph
Nearby
History & Almanac
May 25, 2012 Max Temp Min Temp
Normal (KHWD) 68 °F 53 °F
Record (KHWD) 77 °F (2005) 49 °F (2008)
Yesterday 66 °F 50 °F
Yesterday's Heating Degree Days: 7
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
Friday Good
OZONE
Saturday Good
OZONE
Sunday Good
OZONE
Monday Good
OZONE
Tuesday Good
OZONE
Coastal Water Temperatures
Place Temperature
San Francisco, CA 54.0 °F
Port Chicago, CA 64.0 °F
Marine Forecast
Astronomy
May. 25, 2012 Rise Set
Actual Time 5:51 AM PDT 8:19 PM PDT
Civil Twilight 5:21 AM PDT 8:50 PM PDT
Nautical Twilight 4:43 AM PDT 9:27 PM PDT
Astronomical Twilight 4:02 AM PDT 10:09 PM PDT
Moon 9:54 AM PDT No Moon Set
Length Of Visible Light 15h 28m
Length of Day
14h 28m
Tomorrow will be 1m 18s 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
82 °F
Needles
75 °F
Blythe
72 °F
Palm Springs
72 °F
Thermal
71 °F
Twentynine Palms
32 °F
Truckee-Tahoe
35 °F
Weaverville
36 °F
Mount Shasta
37 °F
Blue Canyon
37 °F
Alturas
Record Extremes
Snow Depth
Station Depth Elevation
Blue Lakes 0 in 8000 ft
Carson Pass 0 in 8500 ft
Forestdale Creek 1 in 8029 ft
Ebbetts Pass 0 in 8700 ft
Rubicon #2 0 in 7500 ft
Snow Depth Reports — Snow Depth Map
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Nearby Events
Event Date Forecast
Oakland Athletics vs. New York Yankees 3:00 AM PDT 2012-05-25 Clear, 51°F
05-25-12 - Oakland - EPA Lead Certification 9:00 AM PDT 2012-05-25 Chance of Rain, 54°F
The Art of the Gourmet Grilled Cheese. 7:00 PM PDT 2012-05-25 Thunderstorm, 56°F
Group Volunteering at the ACCFB 8:00 AM PDT 2012-05-25 Chance of Rain, 54°F
Group Volunteering at the ACCFB 12:00 PM PDT 2012-05-25 Thunderstorm, 56°F
Bay Cruise - the Ultimate Party on the Water 8:00 PM PDT 2012-05-25 Thunderstorm, 55°F
Event data courtesy eviesays.com
Aviation
City Temp. Conditions Updated
Hayward 51 °F Clear 2:54 AM PDT
Oakland 51 °F Partly Cloudy 2:53 AM PDT
San Carlos 50 °F Partly Cloudy 2:50 AM PDT
San Francisco 50 °F Scattered Clouds 1:56 AM PDT
View all Aviation Tools
Flight To ETA Status
UPS942
Louisville, KY 		KOAK 03:54AM On Time
FDX1167
Fort Worth, TX 		KOAK 04:33AM On Time
FDX1419
Memphis, TN 		KOAK 04:59AM On Time
UPS946
Louisville, KY 		KOAK 05:10AM On Time
UAL706
Kahului, HI 		KSFO 04:22AM On Time
UAL396
Honolulu, HI 		KSFO 05:09AM On Time
FDX1545
Memphis, TN 		KSFO 05:42AM On Time
ABX805
Covington, KY 		KSFO 06:42AM On Time
Flight Tracker by FlightAware FlightAware
View U.S. Airport Delays
Type Condition
Flight Rule: VFR (KHWD)
Wind Speed: 17.0 kts.
Wind Dir: 225° (SW)
Ceiling: Unlimited

METAR KHWD 250954Z AUTO 29017G21KT 10SM CLR 11/06 A2975 RMK AO2 SLP083 T01060056

View all Reports & Maps
Sports
Event Date Forecast
Royals vs. Orioles 7:05 PM EDT on May 25, 2012 Partly Cloudy, 81 °F
Cubs vs. Pirates 7:05 PM EDT on May 25, 2012 Chance of a Thunderstorm, 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 Scattered Clouds, High 86° F/ 30° C
Barcelona vs. Athletic 10:00 PM CEST on May 25, 2012 Scattered Clouds, 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, 74 °F
Crowne Plaza Invitational at Colonial 8:30 AM CDT on May 26, 2012 Mostly Cloudy, 72 °F
View all Sports Weather
Weather Stations
Station Location Temp. Windchill Dew Point Humidity Wind Precipitation Elevation Updated Type Website
San Lorenzo, CA 53.0 °F - 45 °F 75% SW  at  5.0 mph 0.00 in / hr 100 ft 2:45 AM PDT Normal  
NW Hayward, Hayward, CA 50.7 °F - 44 °F 77% SSW  at  5.0 mph 0.00 in / hr 69 ft 2:52 AM PDT Normal  
Northwest of Eden Hospital, Castro Valley, CA 49.1 °F 49 °F 40 °F 71% SW  at  1.2 mph 0.00 in / hr 180 ft 2:58 AM PDT Rapid Fire  
Hayward, Hayward, CA 66.4 °F - 66 °F 50% East  at  0.0 mph 0.00 in / hr 13 ft 2:42 AM PDT Normal  
MesoWest Chabot , Castro Valley, CA 50 °F 47 °F - - WSW  at  8 mph 0.00 in / hr 170 ft 12:00 AM PDT MADIS
Southgate, Hayward, CA 51.6 °F - 43 °F 72% WNW  at  6.0 mph - / hr 19 ft 2:50 AM PDT Normal  
Castro Valley, Castro Valley, CA 46.8 °F 47 °F 42 °F 82% NNE  at  1.3 mph 0.00 in / hr 0 ft 2:59 AM PDT Normal
Highland Subdivision, next to CSUH, Hayward, CA 47.1 °F 47 °F 42 °F 81% SW  at  0.0 mph 0.00 in / hr 480 ft 2:52 AM PDT Normal
Davis Instruments, Hayward, CA 50.5 °F - 44 °F 77% North  at  0.0 mph 0.00 in / hr 35 ft 2:57 AM PDT Normal
Hayward Hills, Hayward, CA 48.6 °F 46 °F 45 °F 87% West  at  7.0 mph 0.00 in / hr 597 ft 1:30 AM PDT Normal  
Hayward Hills, sagehouse, Hayward, CA 46.4 °F 42 °F 42 °F 85% NNW  at  10.0 mph 0.00 in / hr 1020 ft 2:58 AM PDT Normal  
Palomares Hills, Castro Valley, CA 47.3 °F 45 °F 34 °F 59% WSW  at  5.4 mph 0.00 in / hr 803 ft 2:58 AM PDT Normal  
Union Landing, Union City, CA 51.4 °F - 44 °F 76% WNW  at  11.0 mph 0.00 in / hr 10 ft 2:59 AM PDT Rapid Fire
Eastmont Hills, Oakland, CA 49.6 °F 50 °F 41 °F 73% East  at  2.0 mph 0.00 in / hr 423 ft 2:56 AM PDT Normal
Eastmont Hills II, Oakland, CA 48.6 °F 49 °F 41 °F 74% West  at  2.0 mph 0.00 in / hr 427 ft 2:58 AM PDT Normal
Fairway Park, Hayward, CA 51.3 °F - 46 °F 83% West  at  7.3 mph 0.00 in / hr 46 ft 2:58 AM PDT Rapid Fire
High St Bridge, Alameda, CA 51.3 °F - 43 °F 72% ENE  at  0.0 mph 0.00 in / hr 16 ft 2:55 AM PDT Normal  
Maxwell Park, Oakland, CA 50.4 °F - 39 °F 66% NW  at  2.0 mph 0.00 in / hr 210 ft 2:58 AM PDT Normal
Upper Laurel, Oakland, CA 51.8 °F - 28 °F 39% WNW  at  10.5 mph 0.00 in / hr 270 ft 2:58 AM PDT Normal
Schaefer Ranch, Dublin, CA 45.0 °F 45 °F 39 °F 79% WSW  at  1.0 mph 0.00 in / hr 920 ft 2:58 AM PDT Rapid Fire  
APRSWXNET Oakland CA , Oakland, CA 51 °F - 40 °F 66% NNW  at  0 mph 0.00 in / hr 200 ft 12:43 AM PDT MADIS
Terry's House, Union City, CA 52.3 °F - 43 °F 73% NW  at  4.0 mph 0.00 in / hr 150 ft 2:58 AM PDT Rapid Fire
Encinal & Lafayette, Alameda, CA 51.8 °F - 42 °F 69% West  at  0.0 mph 0.00 in / hr 15 ft 2:58 AM PDT Rapid Fire
Central Ave and Paru St, Alameda, CA 52.2 °F - 40 °F 63% WNW  at  6.0 mph 0.00 in / hr 30 ft 2:55 AM PDT Normal
Camino Pablo, Moraga, CA 47.9 °F 48 °F 41 °F 78% West  at  1.0 mph 0.00 in / hr 502 ft 2:59 AM PDT Rapid Fire  
Bollinger, San Ramon, CA 47.3 °F 47 °F 39 °F 74% NW  at  1.0 mph 0.00 in / hr 0 ft 2:55 AM PDT Normal  
Newark Blvd & Cedar Blvd (Newark), Newark, CA 50.9 °F - 45 °F 81% NW  at  14.0 mph 0.00 in / hr 19 ft 2:59 AM PDT Rapid Fire  
Bollinger Hills, San Ramon, CA 48.7 °F 49 °F 31 °F 51% WNW  at  2.7 mph 0.00 in / hr 400 ft 2:58 AM PDT Rapid Fire  
Niles, Fremont, CA 50.9 °F - 45 °F 81% North  at  4.0 mph 0.00 in / hr 70 ft 2:55 AM PDT Rapid Fire  
Lake Merritt, Oakland, CA 52.2 °F - 41 °F 66% NE  at  1.0 mph 0.00 in / hr 23 ft 2:57 AM PDT Normal  
Downtown Oakland - Lake Merritt, Oakland, CA 52.2 °F - 41 °F 66% NNE  at  1.0 mph 0.00 in / hr 23 ft 2:52 AM PDT Normal  
RAWS OAKLAND SOUTH CA, Oakland, CA 44 °F 41 °F 42 °F 94% West  at  5 mph 0.00 in / hr 1095 ft 2:33 AM PDT MADIS
Hillcrest Estates, Oakland, CA 44.4 °F 44 °F 39 °F 81% NE  at  0.0 mph 0.00 in / hr 1150 ft 2:56 AM PDT Rapid Fire  
PacWestRoofing.com, Oakland, CA 44.5 °F 40 °F 40 °F 83% SW  at  9.0 mph 0.00 in / hr 1171 ft 2:58 AM PDT Rapid Fire
Joaquin Miller Park / Skyline Blvd., Oakland, CA 42.5 °F 38 °F 40 °F 91% SW  at  8.0 mph 0.00 in / hr 1584 ft 2:55 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