Daly City, CA

4:35 AM PDT on May 25, 2012 (GMT -0700)
Elev: 1096 ft
Lon: 122.4° 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

Daly City Weather at a Glance

Updated 4:35 AM PDT
Elevation
165 ft
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Now
Mostly Cloudy
Mostly Cloudy
Temperature
48.8 °F
Feels Like 45 °F
Wind(mph)
8.0
Sunrise / Set
5:52 AM
8:21 PM
Moon
Waxing Crescent
Today
Thunderstorm 55 °F
T-storms
20% chance of precipitation
Tonight
Partly Cloudy 48 °F
Partly Cloudy
10% chance of precipitation
Tomorrow
Partly Cloudy 55 | 48 °F
Partly Cloudy
Sunday
Partly Cloudy 55 | 50 °F
Partly Cloudy
Monday
Partly Cloudy 54 | 48 °F
Partly Cloudy
Tuesday
Clear 54 | 50 °F
Clear
Today is forecast to be Cooler than yesterday.
Conditions
Pressure
29.76 in
Visibility
10.0 miles
Clouds
Few 1200 ft
Scattered Clouds 1500 ft
Mostly Cloudy 1700 ft
Moisture
Humidity
91%
Rainfall
0.00 in
Snow Depth
Not available.
METAR
METAR KSFO 251056Z 29015G24KT 10SM FEW012 SCT015 BKN017 10/06 A2976
Don't speak METAR? Read our FAQ.
Weather Radio
Launch Weather Radio
Temperature
Windchill
45 °F
Dew Point
46 °F
Wind
Speed / Dir
8.0 mph from WNW
Wind Gust
17.0 mph
Health
UV
0.0 out of 16
Pollen
6.50 out of 12
Pollen Forecast
Ozone
Good
PM2.5
Good
Flu Activity
Local Activity
View Flu Map
Loading…
Source: BestForecast
Descriptive Forecast
Friday
tstorms Partly cloudy with thunderstorms and a chance of rain. High of 55F. Windy. Winds from the WNW at 25 to 30 mph with gusts to 35 mph. Chance of rain 20%.
Friday Night
nt_partlycloudy Partly cloudy with thunderstorms and a chance of rain. Low of 48F. Breezy. Winds from the WNW at 10 to 20 mph.
Saturday
partlycloudy Partly cloudy. High of 55F. Breezy. Winds from the West at 10 to 20 mph.
Saturday Night
nt_partlycloudy Partly cloudy. Low of 48F. Breezy. Winds from the West at 10 to 20 mph.
Sunday
partlycloudy Partly cloudy in the morning, then clear. High of 55F. 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 50F. Winds from the WNW at 10 to 15 mph.
Monday
partlycloudy Partly cloudy in the morning, then clear. High of 54F. Winds from the WNW at 10 to 15 mph.
Monday Night
nt_clear Clear. Low of 48F. Winds from the WNW at 5 to 15 mph.
Tuesday
clear Partly cloudy in the morning, then clear. High of 54F. Winds from the WNW at 5 to 15 mph.
Tuesday Night
nt_mostlycloudy Mostly cloudy. Fog overnight. Low of 50F. Winds from the WNW at 5 to 15 mph.
Wednesday
partlycloudy Clear. High of 57F. Winds from the WNW at 5 to 15 mph.
Wednesday Night
nt_clear Clear. Fog overnight. Low of 54F. Winds from the WNW at 5 to 10 mph.
Thursday
partlycloudy Clear. High of 59F. Winds from the West at 5 to 15 mph.
Thursday Night
nt_clear Clear. Low of 54F. Winds from the West at 5 to 10 mph.
Friday
clear Clear. High of 57F. Winds from the West at 5 to 15 mph.
Friday Night
nt_clear Clear. Low of 52F. Winds from the WNW at 10 to 15 mph.
Saturday
clear Clear. High of 54F. Winds from the WNW at 5 to 20 mph.
Saturday Night
nt_clear Clear. Low of 52F. Winds from the WNW at 10 to 15 mph.
Sunday
clear Clear. High of 54F. Breezy. Winds from the WNW at 10 to 20 mph.
Sunday Night
nt_clear Clear. Low of 52F. Breezy. Winds from the WNW at 10 to 20 mph.
Monday
clear Clear. High of 55F. Breezy. Winds from the WNW at 10 to 20 mph.
Monday Night
nt_clear Clear. Low of 52F. Breezy. Winds from the WNW at 10 to 20 mph.
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Forecast

View Calendar 10-Day Forecast for station KCASANFR100

Friday, 25
Thunderstorm
55 | 48 °F
T-storms
Chance of
Precipitation
20%
Saturday, 26
Partly Cloudy
55 | 48 °F
Partly Cloudy
Chance of
Precipitation
0%
Sunday, 27
Partly Cloudy
55 | 50 °F
Partly Cloudy
Chance of
Precipitation
0%
Monday, 28
Partly Cloudy
54 | 48 °F
Partly Cloudy
Chance of
Precipitation
0%
Tuesday, 29
Clear
54 | 50 °F
Clear
Chance of
Precipitation
0%
Wednesday, 30
Partly Cloudy
57 | 54 °F
Partly Cloudy
Chance of
Precipitation
0%
Thursday, 31
Partly Cloudy
59 | 54 °F
Partly Cloudy
Chance of
Precipitation
0%
Friday, 1
Clear
57 | 52 °F
Clear
Chance of
Precipitation
0%
Saturday, 2
Clear
54 | 52 °F
Clear
Chance of
Precipitation
0%
Sunday, 3
Clear
54 | 52 °F
Clear
Chance of
Precipitation
0%
Source: BestForecast at 1:15 AM PDT on May 25, 2012
Descriptive Forecast
Friday
tstorms Partly cloudy with thunderstorms and a chance of rain. High of 55F. Windy. Winds from the WNW at 25 to 30 mph with gusts to 35 mph. Chance of rain 20%.
Friday Night
nt_partlycloudy Partly cloudy with thunderstorms and a chance of rain. Low of 48F. Breezy. Winds from the WNW at 10 to 20 mph.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 49 | 44 54 | 47 54 | 51 50 | 48
Wind 25 mph NW 28 mph WNW 20 mph WNW 16 mph WNW
Humidity 81% 79% 87% 93%
Chance of Precip. 10% 20% 20% 10%
Cloud Cover 65% 64% 66% 35%
Conditions Mostly Cloudy Thunderstorm Thunderstorm Partly Cloudy
Sunrise & Sunset
5:52 AM
8:21 PM
The quality of the forecasted high temperature for this day is good. MaxT RMSE [2.40], Average RMSE [1.69]
The National Weather Service forecast quality is fair. MaxT RMSE [3.47], Average RMSE [1.57] : Use NWS
Source: BestForecast at 1:15 AM PDT on May 25, 2012
Descriptive Forecast
Saturday
partlycloudy Partly cloudy. High of 55F. Breezy. Winds from the West at 10 to 20 mph.
Saturday Night
nt_partlycloudy Partly cloudy. Low of 48F. Breezy. Winds from the West at 10 to 20 mph.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 50 | 49 55 | 54 53 | 51 50 | 49
Wind 10 mph WNW 12 mph West 16 mph West 10 mph West
Humidity 92% 98% 94% 95%
Chance of Precip. 10% 10% 0% 0%
Cloud Cover 50% 50% 53% 60%
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 fair. MaxT RMSE [2.74], Average RMSE [1.64]
The National Weather Service forecast quality is poor. MaxT RMSE [3.75], Average RMSE [1.53] : Use NWS
Source: BestForecast at 1:15 AM PDT on May 25, 2012
Descriptive Forecast
Sunday
partlycloudy Partly cloudy in the morning, then clear. High of 55F. 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 50F. Winds from the WNW at 10 to 15 mph.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 49 | 47 53 | 52 53 | 52 51 | 50
Wind 6 mph West 10 mph West 13 mph West 10 mph WNW
Humidity 96% 93% 95% 94%
Chance of Precip. 0% 0% 0% 0%
Cloud Cover 59% 13% 17% 4%
Conditions Partly Cloudy Clear Clear Fog
Sunrise & Sunset
5:51 AM
8:22 PM
The quality of the forecasted high temperature for this day is fair. MaxT RMSE [3.27], Average RMSE [1.35]
The National Weather Service forecast quality is fair. MaxT RMSE [3.46], Average RMSE [1.42] : Use NWS
Source: BestForecast at 1:15 AM PDT on May 25, 2012
Descriptive Forecast
Monday
partlycloudy Partly cloudy in the morning, then clear. High of 54F. Winds from the WNW at 10 to 15 mph.
Monday Night
nt_clear Clear. Low of 48F. Winds from the WNW at 5 to 15 mph.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 50 | 48 52 | 51 53 | 52 50 | 48
Wind 9 mph WNW 13 mph WNW 14 mph WNW 10 mph WNW
Humidity 96% 96% 95% 92%
Chance of Precip. 10% 0% 0% 0%
Cloud Cover 83% 0% 0% 4%
Conditions Fog 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 [2.10], Average RMSE [1.50]
The National Weather Service forecast quality is fair. MaxT RMSE [3.14], Average RMSE [1.42] : Use NWS
Source: BestForecast at 1:15 AM PDT on May 25, 2012
Descriptive Forecast
Tuesday
clear Partly cloudy in the morning, then clear. High of 54F. Winds from the WNW at 5 to 15 mph.
Tuesday Night
nt_mostlycloudy Mostly cloudy. Fog overnight. Low of 50F. Winds from the WNW at 5 to 15 mph.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 49 | 48 53 | 51 53 | 51 51 | 50
Wind 7 mph WNW 9 mph WNW 11 mph West 9 mph WNW
Humidity 95% 91% 92% 95%
Chance of Precip. 0% 0% 0% 0%
Cloud Cover 10% 1% 0% 100%
Conditions Clear Clear Clear Overcast
Sunrise & Sunset
5:50 AM
8:24 PM
The quality of the forecasted high temperature for this day is fair. MaxT RMSE [2.70], Average RMSE [1.89]
The National Weather Service forecast quality is fair. MaxT RMSE [3.19], Average RMSE [1.25] : Use NWS
Source: BestForecast at 1:15 AM PDT on May 25, 2012
Descriptive Forecast
Wednesday
partlycloudy Clear. High of 57F. Winds from the WNW at 5 to 15 mph.
Wednesday Night
nt_clear Clear. Fog overnight. Low of 54F. Winds from the WNW at 5 to 10 mph.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 51 | 49 54 | 53 55 | 51 54 | 52
Wind 7 mph WNW 9 mph WNW 11 mph West 7 mph WNW
Humidity 93% 91% 84% 92%
Chance of Precip. 0% 0% 0% 0%
Cloud Cover 2% 0% 0% 0%
Conditions Fog Clear Clear Clear
Sunrise & Sunset
5:50 AM
8:24 PM
The quality of the forecasted high temperature for this day is fair. MaxT RMSE [3.43], Average RMSE [2.04]
The National Weather Service forecast quality is fair. MaxT RMSE [3.31], Average RMSE [1.21] : Use NWS
Source: BestForecast at 1:15 AM PDT on May 25, 2012
Descriptive Forecast
Thursday
partlycloudy Clear. High of 59F. Winds from the West at 5 to 15 mph.
Thursday Night
nt_clear Clear. Low of 54F. Winds from the West at 5 to 10 mph.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 54 | 52 58 | 56 55 | 52 55 | 55
Wind 4 mph WNW 7 mph West 10 mph West 6 mph WNW
Humidity 97% 98% 92% 99%
Chance of Precip. 0% 0% 0% 0%
Cloud Cover 0% 0% 0% 0%
Conditions Fog Clear Clear Clear
Sunrise & Sunset
5:50 AM
8:24 PM
The quality of the forecasted high temperature for this day is fair. MaxT RMSE [3.19], Average RMSE [2.11]
Source: BestForecast at 1:15 AM PDT on May 25, 2012
Descriptive Forecast
Friday
clear Clear. High of 57F. Winds from the West at 5 to 15 mph.
Friday Night
nt_clear Clear. Low of 52F. Winds from the WNW at 10 to 15 mph.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 54 | 54 56 | 55 55 | 55 55 | 55
Wind 5 mph West 7 mph WSW 12 mph West 11 mph WNW
Humidity 98% 94% 95% 98%
Chance of Precip. 0% 0% 0% 0%
Cloud Cover 4% 1% 0% 3%
Conditions Clear Clear Clear Clear
Sunrise & Sunset
5:50 AM
8:24 PM
The quality of the forecasted high temperature for this day is poor. MaxT RMSE [3.56], Average RMSE [2.72]
Source: BestForecast at 1:15 AM PDT on May 25, 2012
Descriptive Forecast
Saturday
clear Clear. High of 54F. Winds from the WNW at 5 to 20 mph.
Saturday Night
nt_clear Clear. Low of 52F. Winds from the WNW at 10 to 15 mph.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 53 | 53 54 | 52 54 | 52 54 | 52
Wind 9 mph WNW 10 mph WNW 15 mph WNW 12 mph WNW
Humidity 97% 93% 91% 92%
Chance of Precip. 0% 0% 0% 0%
Cloud Cover 5% 8% 10% 7%
Conditions Clear Clear Clear Clear
Sunrise & Sunset
5:50 AM
8:24 PM
The quality of the forecasted high temperature for this day is poor. MaxT RMSE [4.04], Average RMSE [2.56]
Source: BestForecast at 1:15 AM PDT on May 25, 2012
Descriptive Forecast
Sunday
clear Clear. High of 54F. Breezy. Winds from the WNW at 10 to 20 mph.
Sunday Night
nt_clear Clear. Low of 52F. Breezy. Winds from the WNW at 10 to 20 mph.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 52 | 47 53 | 44 54 | 40 53 | 45
Wind 10 mph WNW 12 mph WNW 17 mph WNW 13 mph WNW
Humidity 86% 72% 61% 72%
Chance of Precip. 0% 0% 0% 0%
Cloud Cover 5% 3% 1% 1%
Conditions Clear Clear Clear Clear
Sunrise & Sunset
5:50 AM
8:24 PM
Source: BestForecast at 1:15 AM PDT on May 25, 2012
Descriptive Forecast
Monday
clear Clear. High of 55F. Breezy. Winds from the WNW at 10 to 20 mph.
Monday Night
nt_clear Clear. Low of 52F. Breezy. Winds from the WNW at 10 to 20 mph.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 52 | 46 54 | 42 55 | 40 53 | 45
Wind 11 mph WNW 11 mph WNW 16 mph WNW 12 mph WNW
Humidity 79% 66% 57% 71%
Chance of Precip. 0% 0% 0% 0%
Cloud Cover 1% 1% 1% %
Conditions Clear Clear Clear Clear
Sunrise & Sunset
5:50 AM
8:24 PM
Scientific Forecaster Discussion — MOS Weather Graph
Nearby
History & Almanac
May 25, 2012 Max Temp Min Temp
Normal (KSFO) 68 °F 51 °F
Record (KSFO) 87 °F (1951) 45 °F (1967)
Yesterday 63 °F 50 °F
Yesterday's Heating Degree Days: 8
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
PM2.5
Yesterday Good
OZONE
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 53.1 °F
Richmond, CA 57.9 °F
Port Chicago, CA 63.0 °F
Marine Forecast
Astronomy
May. 25, 2012 Rise Set
Actual Time 5:52 AM PDT 8:21 PM PDT
Civil Twilight 5:22 AM PDT 8:51 PM PDT
Nautical Twilight 4:45 AM PDT 9:28 PM PDT
Astronomical Twilight 4:03 AM PDT 10:10 PM PDT
Moon 9:56 AM PDT No Moon Set
Length Of Visible Light 15h 29m
Length of Day
14h 28m
Tomorrow will be 1m 18s longer.
Waxing Crescent, 18% 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
35 °F
Blue Canyon
36 °F
Alturas
36 °F
Mount Shasta
Record Extremes
Snow Depth
Station Depth Elevation
Carson Pass 0 in 8500 ft
Blue Lakes 0 in 8000 ft
Forestdale Creek 1 in 8029 ft
Rubicon #2 1 in 7500 ft
Ebbetts Pass 0 in 8700 ft
Snow Depth Reports — Snow Depth Map
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Travel Planning
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Nearby Events
Event Date Forecast
I Love This City - San Francisco: 2-Day GA Ticket 3:00 PM PDT 2012-05-25 Thunderstorm, 57°F
Nick Griffin 8:00 PM PDT 2012-05-25 Thunderstorm, 54°F
Nick Griffin 10:00 PM PDT 2012-05-25 Thunderstorm, 53°F
Stiff Necked Fools 11:00 PM PDT 2012-05-25 Partly Cloudy, 52°F
NADIA ALI plus Trevor Simpson 9:00 PM PDT 2012-05-25 Thunderstorm, 53°F
Alma Desnuda plus Yonat and Her Muse 9:00 PM PDT 2012-05-25 Thunderstorm, 53°F
Event data courtesy eviesays.com
Aviation
City Temp. Conditions Updated
San Francisco 50 °F Mostly Cloudy 3:56 AM PDT
Oakland 51 °F Partly Cloudy 3:53 AM PDT
Half Moon Bay 48 °F Mostly Cloudy 4:15 AM PDT
San Carlos 50 °F Overcast 4:10 AM PDT
View all Aviation Tools
Flight To ETA Status
FDX1167
Fort Worth, TX 		KOAK 04:39AM On Time
FDX1419
Memphis, TN 		KOAK 05:03AM On Time
UPS946
Louisville, KY 		KOAK 05:15AM On Time
FDX1705
Indianapolis, IN 		KOAK 05:23AM On Time
UAL706
 KSFO 04:25AM On Time
CPA97
Los Angeles, CA 		KSFO 05:06AM On Time
ABX1920
Los Angeles, CA 		KSFO 05:09AM On Time
UAL396
Honolulu, HI 		KSFO 05:10AM On Time
Flight Tracker by FlightAware FlightAware
View U.S. Airport Delays
Type Condition
Flight Rule: MVFR (KSFO)
Wind Speed: 15.0 kts.
Wind Dir: 292° (WNW)
Ceiling: 1700 ft

METAR KSFO 251056Z 29015G24KT 10SM FEW012 SCT015 BKN017 10/06 A2976

View all Reports & Maps
Sports
Event Date Forecast
Royals vs. Orioles 7:05 PM EDT on May 25, 2012 Clear, 79 °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, 81 °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
Ingleside District, San Francisco, CA 48.8 °F 45 °F 46 °F 91% WNW  at  8.0 mph 0.00 in / hr 165 ft 4:35 AM PDT Rapid Fire  
Sunnyside, San Francisco, CA 47.5 °F 45 °F 45 °F 91% NW  at  5.0 mph 0.00 in / hr 364 ft 4:35 AM PDT Rapid Fire
Portola, San Francisco, CA 47.7 °F 42 °F 45 °F 91% WNW  at  13.2 mph 0.00 in / hr 290 ft 4:35 AM PDT Rapid Fire
On the Hill, Pacifica, CA 46.1 °F 46 °F 45 °F 95% NW  at  2.0 mph 0.00 in / hr 732 ft 4:34 AM PDT Normal  
Mussel Rock, Daly City, CA 47.0 °F 39 °F 47 °F 100% WNW  at  26.0 mph 0.00 in / hr 514 ft 4:35 AM PDT Rapid Fire  
APRSWXNET San Francisco CA , San Francisco, CA 47 °F 41 °F 44 °F 90% West  at  15 mph 0.00 in / hr 406 ft 4:04 AM PDT MADIS
Pacifica - Upper Manor, Pacifica, CA 48.1 °F 43 °F 45 °F 88% SSE  at  12.0 mph 0.00 in / hr 690 ft 4:35 AM PDT Normal
Billy Goat Hill, San Francisco, CA 47.8 °F 46 °F 45 °F 91% ESE  at  4.0 mph 0.00 in / hr 340 ft 4:35 AM PDT Normal  
Monte Verde Area, San Bruno, CA 47.1 °F 41 °F 42 °F 84% West  at  16.8 mph 0.00 in / hr 490 ft 4:35 AM PDT Rapid Fire  
Noe Valley (South), San Francisco, CA 46.4 °F 46 °F 34 °F 61% NNW  at  3.0 mph 0.00 in / hr 200 ft 4:35 AM PDT Normal
West Portal, San Francisco, CA 47.1 °F 47 °F 44 °F 88% NW  at  2.0 mph 0.00 in / hr 449 ft 4:34 AM PDT Rapid Fire
Twin Peaks, San Francisco, CA 46.3 °F 41 °F 44 °F 92% NW  at  11.0 mph 0.00 in / hr 600 ft 4:35 AM PDT Normal  
Forest Hill, San Francisco, CA 45.6 °F 46 °F 43 °F 91% North  at  0.0 mph 0.00 in / hr 680 ft 4:28 AM PDT Normal  
Noe Valley, San Francisco, CA 48.0 °F 45 °F 44 °F 87% NNE  at  6.0 mph 0.00 in / hr 301 ft 4:34 AM PDT Normal
Diamond Heights, San Francisco, CA 46.1 °F 46 °F 44 °F 91% North  at  3.0 mph 0.00 in / hr 512 ft 4:35 AM PDT Rapid Fire  
Golden Gate Heights, San Francisco, CA 47.1 °F 43 °F 45 °F 92% North  at  8.0 mph 0.00 in / hr 574 ft 4:35 AM PDT Rapid Fire
Castro/San Francisco, San Francisco, CA 48.7 °F 47 °F 36 °F 62% WNW  at  4.5 mph 0.00 in / hr 200 ft 4:30 AM PDT Normal  
The Castro, San Francisco, CA 48.3 °F 43 °F 43 °F 83% West  at  14.0 mph 0.00 in / hr 188 ft 4:35 AM PDT Normal
Cole Valley, San Francisco, CA 46.8 °F 47 °F 44 °F 91% South  at  1.6 mph 0.00 in / hr 400 ft 4:35 AM PDT Rapid Fire  
Crestmoor, San Bruno, CA 46.2 °F 44 °F 43 °F 90% WNW  at  5.0 mph 0.00 in / hr 500 ft 4:35 AM PDT Rapid Fire  
HADS SAN FRANCISCO DOWNTOWN CA, San Francisco, CA 49 °F 49 °F 43 °F 81% North  at  - 0.00 in / hr 174 ft 3:43 AM PDT MADIS
Potrero Hill, San Francisco, CA 48.3 °F 46 °F 44 °F 86% North  at  6.0 mph - / hr 300 ft 4:16 AM PDT Normal  
Cattle Hill, Pacifica, CA 45.9 °F 41 °F 44 °F 95% NW  at  11.0 mph 0.00 in / hr 679 ft 4:35 AM PDT Normal  
Mid Richmond, San Francisco, CA 48.7 °F 44 °F 46 °F 91% WNW  at  11.0 mph 0.00 in / hr 200 ft 4:35 AM PDT Rapid Fire
MesoWest Fort Funston , San Francisco, CA 49 °F 42 °F - - WNW  at  23 mph 0.00 in / hr 57 ft 2:00 AM PDT MADIS
Rollingwood, San Bruno, CA 46.6 °F 40 °F 43 °F 86% East  at  16.8 mph 0.00 in / hr 0 ft 4:35 AM PDT Rapid Fire  
The Mission: Even the weather is hip, San Francisco, CA 49.0 °F 44 °F 45 °F 85% NNW  at  12.2 mph 0.00 in / hr 65 ft 4:35 AM PDT Rapid Fire  
Forest Hill, San Francisco, CA 47.1 °F 44 °F 45 °F 92% West  at  6.0 mph - / hr 0 ft 4:34 AM PDT Normal  
MesoWest San Fran Sewage Treatment Plant, San Francisco, CA 50 °F - - - North  at  - 0.00 in / hr 4 ft 2:00 AM PDT MADIS
West Fairway Park, Pacifica, CA 49.8 °F 47 °F 46 °F 86% WNW  at  6.0 mph 0.00 in / hr 40 ft 4:31 AM PDT Normal
North Mission (Valencia & Market), San Francisco, CA 50.4 °F - 44 °F 80% NNE  at  3.0 mph 0.00 in / hr 62 ft 4:27 AM PDT Normal  
APRSWXNET San Francisco CA , San Francisco, CA 48 °F 42 °F 45 °F 91% WNW  at  17 mph 0.00 in / hr 32 ft 4:15 AM PDT MADIS
SOMA - Near Van Ness, San Francisco, CA 49.1 °F 45 °F 45 °F 85% WNW  at  9.0 mph 0.00 in / hr 49 ft 4:35 AM PDT Rapid Fire
Mission Bay - My weather is better than , San Francisco, CA 49.3 °F 49 °F 42 °F 76% North  at  0.0 mph 0.00 in / hr 80 ft 4:21 AM PDT Normal  
China Basin Landing, San Francisco, CA 50.2 °F - 45 °F 81% NNW  at  2.0 mph 0.00 in / hr 70 ft 4:35 AM PDT Rapid Fire
SOMA, San Francisco, CA 49.0 °F 48 °F 44 °F 82% NW  at  4.0 mph 0.00 in / hr 23 ft 4:27 AM PDT Normal
SoMa, San Francisco, CA 50.4 °F - 44 °F 80% SW  at  3.0 mph 0.00 in / hr 0 ft 4:32 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