Reporting Station : San Francisco International Airport, CA
1 Weather Alert
for your area.
Low clouds. Cool.
Rise 6:13AM
Set 8:18PM
Waning crescent
Rise2:11AM
Set6:02PM
WEDNESDAY NIGHT
SFO / No delays
JULY 31ST, 1976-After a thunderstorm drops 10 in (254 mm) of rain within four hours into two tributaries of the Thompson River, a flash flood in the Thompson Canyon, in northeast Colorado, drowns 139 campers; five others are reported missing as losses climb to $35.5 million. Helicopters lift nearly 1,000 other victims to safety.
| JULY 31ST, 1976 |
After a thunderstorm drops 10 in (254 mm) of rain within four hours into two tributaries of the Thompson River, a flash flood in the Thompson Canyon, in northeast Colorado, drowns 139 campers; five others are reported missing as losses climb to $35.5 million. Helicopters lift nearly 1,000 other victims to safety. |
| JULY 31ST, 1987 |
The deadliest tornado in 75 years struck Edmonton, Alberta, killing 26 persons and injuring 200 others. The twister caused more than 75 million dollars damage along its nineteen mile path, leaving 400 families homeless. At the Evergreen Mobile Home Park, up to 200 of the 720 homes were flattened by the tornado. |
| JULY 30TH, 1979 |
A forty-minute hailstorm bombed Fort Collins CO with baseball to softball size hail. Two thousand homes and 2500 automobiles were damaged, and about 25 persons were injured, mainly when hit on the head by the huge stones. A three month old baby died later of injuries. |
| JULY 30TH, 1965 |
The temperature at Portland OR reached 107 degrees to equal their all-time record high. |
| JULY 29TH, 1898 |
The temperature at Prineville OR soared to 119 degrees to establish a state record, which was tied on the 10th of August at Pendleton. |
| JULY 29TH, 1905 |
Heavy rain in southwestern Connecticut caused a dam break, and the resulting flood caused a quarter of a million dollars damage at Bridgeport. As much as eleven inches of rain fell prior to the flood. |
| JULY 28TH, 1986 |
Severe thunderstorms moving out of South Dakota across Iowa produce high winds which derailed eighteen piggyback trailer cars of a westbound freight train near Boone IA. Sixteen of the cars fell 187 feet into the Des Moines River. The thunderstorms also spawned a number of tornadoes, including one which caused twenty-five to fifty million dollars damage at Sloan, near Sioux City IA. |
| JULY 28TH, 1819 |
A small but intense hurricane passed over Bay Saint Louis MS. The hurricane was considered the worst in fifty years. Few houses were left standing either at Bay Saint Louis or at Pass Christian, and much of the Mississippi coast was desolate following the storm. A U.S. cutter was lost along with its thirty-nine crew members. The storm struck the same area that was hit 150 years later by Hurricane Camille. |
| JULY 27TH, 1943 |
On a whim, and flying a single engine AT-6, Lieutenant Ralph O' Hair and Colonel Duckworth were the first to fly into a hurricane. It started regular Air Force flights into hurricanes. |
| JULY 27TH, 1926 |
A hurricane came inland near Daytona Beach FL. The hurricane caused 2.5 million dollars damage in eastern Florida, including the Jacksonville area. |
| JULY 26TH, 1819 |
Twin cloudbursts of fifteen inches struck almost simultaneously at Catskill NY and Westfield MA. Flash flooding resulted in enormous erosion. |
| Issued By | NWS Field Office | Broadcast Time | Mon, 29 Dec 2014 03:43:00 PST |
| Issuing Time | Mon, 29 Dec 2014 03:43:00 PST | Valid Until | Mon, 29 Dec 2014 03:43:00 PST |
Strong northerly winds are forecast to develop across the San Francisco Bay Area by midday Tuesday and continue through midday Wednesday. A strong..cold and dry storm system will sweep into northern and central California late Monday night and Tuesday morning. This system will generate strong and gusty north to northest winds across the region from midday Tuesday through midday Wednesday.
Rise 6:13AM
Set 8:18PM
Waning crescent
Rise2:11AM
Set6:02PM
WEDNESDAY NIGHT
SFO / No delays
| History | |||
| Weather Station: San Francisco , CA , US | |||
| July Data | Choose another month |
| Averages | |
|
Average High Temperature
13.30 °C
|
Average Low Temperature
7.80 °C
|
|
Average Mean Temp
10.60 °C
|
Average Dew Point
* °C
|
|
Average Windspeed
* km/h
|
Average Wind Direction
*
|
|
Average Morning Relative Humidity
*
|
Average Afternoon Relative Humidity
*
|
|
Typical Sky Cover
*
|
Average Precipitation (US Only)
10.41
|
|
Average Snowfall (US Only)
*
|
|
| Daily Counts | |
|
Days With Precipitation
11
|
Days With Thunderstorms
*
|
|
Days With Fog
*
|
Days With Snow
0
|
Days With Lows Below Freezing
15
|
Days above 90° F (32.2° C)
0
|
| Records | |
|
Record High
26.10 °C
|
Record Low
-1.10 °C
|
|
Record Wind Speed
-183.30 km/h
|
Record Monthly Snowfall
* cm
|
Record 24-hour Snowfall
* cm
|
Record Monthly Rainfall
272 mm
|
Record 24-hour Rainfall
81 mm
|
Record Minimum Monthly Precipitation
1.27 mm
|
| Averages | |
|
Average High Temperature
15.60 °C
|
Average Low Temperature
8.90 °C
|
|
Average Mean Temp
12.20 °C
|
Average Dew Point
* °C
|
|
Average Windspeed
* km/h
|
Average Wind Direction
*
|
|
Average Morning Relative Humidity
*
|
Average Afternoon Relative Humidity
*
|
|
Typical Sky Cover
*
|
Average Precipitation (US Only)
8.88
|
|
Average Snowfall (US Only)
*
|
|
| Daily Counts | |
|
Days With Precipitation
10
|
Days With Thunderstorms
1
|
|
Days With Fog
1
|
Days With Snow
0
|
Days With Lows Below Freezing
7
|
Days above 90° F (32.2° C)
0
|
| Records | |
|
Record High
27.20 °C
|
Record Low
-0.60 °C
|
|
Record Wind Speed
-183.30 km/h
|
Record Monthly Snowfall
* cm
|
Record 24-hour Snowfall
* cm
|
Record Monthly Rainfall
256 mm
|
Record 24-hour Rainfall
53 mm
|
Record Minimum Monthly Precipitation
* mm
|
| Averages | |
|
Average High Temperature
16.10 °C
|
Average Low Temperature
9.40 °C
|
|
Average Mean Temp
12.80 °C
|
Average Dew Point
* °C
|
|
Average Windspeed
* km/h
|
Average Wind Direction
*
|
|
Average Morning Relative Humidity
*
|
Average Afternoon Relative Humidity
*
|
|
Typical Sky Cover
*
|
Average Precipitation (US Only)
7.36
|
|
Average Snowfall (US Only)
*
|
|
| Daily Counts | |
|
Days With Precipitation
10
|
Days With Thunderstorms
*
|
|
Days With Fog
0
|
Days With Snow
0
|
Days With Lows Below Freezing
4
|
Days above 90° F (32.2° C)
0
|
| Records | |
|
Record High
28.90 °C
|
Record Low
1.70 °C
|
|
Record Wind Speed
-183.30 km/h
|
Record Monthly Snowfall
* cm
|
Record 24-hour Snowfall
* cm
|
Record Monthly Rainfall
228 mm
|
Record 24-hour Rainfall
63 mm
|
Record Minimum Monthly Precipitation
* mm
|
| Averages | |
|
Average High Temperature
17.20 °C
|
Average Low Temperature
10.00 °C
|
|
Average Mean Temp
13.30 °C
|
Average Dew Point
* °C
|
|
Average Windspeed
* km/h
|
Average Wind Direction
*
|
|
Average Morning Relative Humidity
*
|
Average Afternoon Relative Humidity
*
|
|
Typical Sky Cover
*
|
Average Precipitation (US Only)
3.81
|
|
Average Snowfall (US Only)
0.00
|
|
| Daily Counts | |
|
Days With Precipitation
6
|
Days With Thunderstorms
1
|
|
Days With Fog
0
|
Days With Snow
0
|
Days With Lows Below Freezing
2
|
Days above 90° F (32.2° C)
*
|
| Records | |
|
Record High
34.40 °C
|
Record Low
4.40 °C
|
|
Record Wind Speed
16.70 km/h
|
Record Monthly Snowfall
0.0 cm
|
Record 24-hour Snowfall
0.00 cm
|
Record Monthly Rainfall
140 mm
|
Record 24-hour Rainfall
51 mm
|
Record Minimum Monthly Precipitation
* mm
|
| Averages | |
|
Average High Temperature
17.80 °C
|
Average Low Temperature
10.60 °C
|
|
Average Mean Temp
14.40 °C
|
Average Dew Point
* °C
|
|
Average Windspeed
* km/h
|
Average Wind Direction
*
|
|
Average Morning Relative Humidity
*
|
Average Afternoon Relative Humidity
*
|
|
Typical Sky Cover
*
|
Average Precipitation (US Only)
1.27
|
|
Average Snowfall (US Only)
0.00
|
|
| Daily Counts | |
|
Days With Precipitation
3
|
Days With Thunderstorms
0
|
|
Days With Fog
0
|
Days With Snow
0
|
Days With Lows Below Freezing
*
|
Days above 90° F (32.2° C)
*
|
| Records | |
|
Record High
35.60 °C
|
Record Low
6.70 °C
|
|
Record Wind Speed
-183.30 km/h
|
Record Monthly Snowfall
0.0 cm
|
Record 24-hour Snowfall
0.00 cm
|
Record Monthly Rainfall
102 mm
|
Record 24-hour Rainfall
36 mm
|
Record Minimum Monthly Precipitation
0.00 mm
|
| Averages | |
|
Average High Temperature
18.90 °C
|
Average Low Temperature
11.70 °C
|
|
Average Mean Temp
15.60 °C
|
Average Dew Point
* °C
|
|
Average Windspeed
* km/h
|
Average Wind Direction
*
|
|
Average Morning Relative Humidity
*
|
Average Afternoon Relative Humidity
*
|
|
Typical Sky Cover
*
|
Average Precipitation (US Only)
0.51
|
|
Average Snowfall (US Only)
0.00
|
|
| Daily Counts | |
|
Days With Precipitation
1
|
Days With Thunderstorms
*
|
|
Days With Fog
0
|
Days With Snow
0
|
Days With Lows Below Freezing
0
|
Days above 90° F (32.2° C)
*
|
| Records | |
|
Record High
38.30 °C
|
Record Low
8.30 °C
|
|
Record Wind Speed
-183.30 km/h
|
Record Monthly Snowfall
0.0 cm
|
Record 24-hour Snowfall
0.00 cm
|
Record Monthly Rainfall
36 mm
|
Record 24-hour Rainfall
33 mm
|
Record Minimum Monthly Precipitation
0.00 mm
|
| Averages | |
|
Average High Temperature
18.90 °C
|
Average Low Temperature
12.20 °C
|
|
Average Mean Temp
15.60 °C
|
Average Dew Point
* °C
|
|
Average Windspeed
* km/h
|
Average Wind Direction
*
|
|
Average Morning Relative Humidity
*
|
Average Afternoon Relative Humidity
*
|
|
Typical Sky Cover
*
|
Average Precipitation (US Only)
*
|
|
Average Snowfall (US Only)
0.00
|
|
| Daily Counts | |
|
Days With Precipitation
1
|
Days With Thunderstorms
1
|
|
Days With Fog
0
|
Days With Snow
0
|
Days With Lows Below Freezing
0
|
Days above 90° F (32.2° C)
*
|
| Records | |
|
Record High
39.40 °C
|
Record Low
8.30 °C
|
|
Record Wind Speed
-183.30 km/h
|
Record Monthly Snowfall
0.0 cm
|
Record 24-hour Snowfall
0.00 cm
|
Record Monthly Rainfall
5 mm
|
Record 24-hour Rainfall
3 mm
|
Record Minimum Monthly Precipitation
0.00 mm
|
| Averages | |
|
Average High Temperature
18.90 °C
|
Average Low Temperature
12.20 °C
|
|
Average Mean Temp
16.10 °C
|
Average Dew Point
* °C
|
|
Average Windspeed
* km/h
|
Average Wind Direction
*
|
|
Average Morning Relative Humidity
*
|
Average Afternoon Relative Humidity
*
|
|
Typical Sky Cover
*
|
Average Precipitation (US Only)
*
|
|
Average Snowfall (US Only)
0.00
|
|
| Daily Counts | |
|
Days With Precipitation
1
|
Days With Thunderstorms
1
|
|
Days With Fog
0
|
Days With Snow
0
|
Days With Lows Below Freezing
0
|
Days above 90° F (32.2° C)
*
|
| Records | |
|
Record High
35.60 °C
|
Record Low
8.90 °C
|
|
Record Wind Speed
-183.30 km/h
|
Record Monthly Snowfall
0.0 cm
|
Record 24-hour Snowfall
0.00 cm
|
Record Monthly Rainfall
13 mm
|
Record 24-hour Rainfall
13 mm
|
Record Minimum Monthly Precipitation
0.00 mm
|
| Averages | |
|
Average High Temperature
21.10 °C
|
Average Low Temperature
13.30 °C
|
|
Average Mean Temp
17.20 °C
|
Average Dew Point
* °C
|
|
Average Windspeed
* km/h
|
Average Wind Direction
*
|
|
Average Morning Relative Humidity
*
|
Average Afternoon Relative Humidity
*
|
|
Typical Sky Cover
*
|
Average Precipitation (US Only)
0.51
|
|
Average Snowfall (US Only)
0.00
|
|
| Daily Counts | |
|
Days With Precipitation
1
|
Days With Thunderstorms
*
|
|
Days With Fog
0
|
Days With Snow
0
|
Days With Lows Below Freezing
0
|
Days above 90° F (32.2° C)
1
|
| Records | |
|
Record High
38.30 °C
|
Record Low
8.90 °C
|
|
Record Wind Speed
-183.30 km/h
|
Record Monthly Snowfall
0.0 cm
|
Record 24-hour Snowfall
0.00 cm
|
Record Monthly Rainfall
53 mm
|
Record 24-hour Rainfall
51 mm
|
Record Minimum Monthly Precipitation
0.00 mm
|
| Averages | |
|
Average High Temperature
20.60 °C
|
Average Low Temperature
12.80 °C
|
|
Average Mean Temp
16.70 °C
|
Average Dew Point
* °C
|
|
Average Windspeed
* km/h
|
Average Wind Direction
*
|
|
Average Morning Relative Humidity
*
|
Average Afternoon Relative Humidity
*
|
|
Typical Sky Cover
*
|
Average Precipitation (US Only)
2.79
|
|
Average Snowfall (US Only)
0.00
|
|
| Daily Counts | |
|
Days With Precipitation
4
|
Days With Thunderstorms
1
|
|
Days With Fog
0
|
Days With Snow
0
|
Days With Lows Below Freezing
*
|
Days above 90° F (32.2° C)
*
|
| Records | |
|
Record High
38.90 °C
|
Record Low
6.10 °C
|
|
Record Wind Speed
16.70 km/h
|
Record Monthly Snowfall
0.0 cm
|
Record 24-hour Snowfall
0.00 cm
|
Record Monthly Rainfall
140 mm
|
Record 24-hour Rainfall
58 mm
|
Record Minimum Monthly Precipitation
* mm
|
| Averages | |
|
Average High Temperature
17.80 °C
|
Average Low Temperature
10.60 °C
|
|
Average Mean Temp
14.40 °C
|
Average Dew Point
* °C
|
|
Average Windspeed
* km/h
|
Average Wind Direction
*
|
|
Average Morning Relative Humidity
*
|
Average Afternoon Relative Humidity
*
|
|
Typical Sky Cover
*
|
Average Precipitation (US Only)
6.60
|
|
Average Snowfall (US Only)
0.00
|
|
| Daily Counts | |
|
Days With Precipitation
8
|
Days With Thunderstorms
*
|
|
Days With Fog
0
|
Days With Snow
0
|
Days With Lows Below Freezing
1
|
Days above 90° F (32.2° C)
0
|
| Records | |
|
Record High
30.00 °C
|
Record Low
3.90 °C
|
|
Record Wind Speed
-183.30 km/h
|
Record Monthly Snowfall
0.0 cm
|
Record 24-hour Snowfall
0.00 cm
|
Record Monthly Rainfall
208 mm
|
Record 24-hour Rainfall
63 mm
|
Record Minimum Monthly Precipitation
0.00 mm
|
| Averages | |
|
Average High Temperature
13.90 °C
|
Average Low Temperature
8.30 °C
|
|
Average Mean Temp
11.10 °C
|
Average Dew Point
* °C
|
|
Average Windspeed
* km/h
|
Average Wind Direction
*
|
|
Average Morning Relative Humidity
*
|
Average Afternoon Relative Humidity
*
|
|
Typical Sky Cover
*
|
Average Precipitation (US Only)
9.90
|
|
Average Snowfall (US Only)
*
|
|
| Daily Counts | |
|
Days With Precipitation
10
|
Days With Thunderstorms
0
|
|
Days With Fog
0
|
Days With Snow
*
|
Days With Lows Below Freezing
11
|
Days above 90° F (32.2° C)
0
|
| Records | |
|
Record High
24.40 °C
|
Record Low
-2.80 °C
|
|
Record Wind Speed
16.70 km/h
|
Record Monthly Snowfall
2.5 cm
|
Record 24-hour Snowfall
2.50 cm
|
Record Monthly Rainfall
292 mm
|
Record 24-hour Rainfall
79 mm
|
Record Minimum Monthly Precipitation
0.00 mm
|
Rise 6:13AM
Set 8:18PM
Waning crescent
Rise2:11AM
Set6:02PM
WEDNESDAY NIGHT
SFO / No delays
| Day | Reason | Upper Soil Moisture | Lower Soil Moisture | |
| Wednesday |  |
Fire danger low | 21% | 23% |
| Thursday | |
Fire danger low | 21% | 23% |
| Friday |  |
Fire danger moderate | 21% | 23% |
| Saturday | |
Fire danger moderate | 21% | 23% |
| Sunday | |
Fire danger moderate | 21% | 23% |
| Monday | |
Fire danger moderate | 21% | 23% |
Rise 6:13AM
Set 8:18PM
Waning crescent
Rise2:11AM
Set6:02PM
WEDNESDAY NIGHT
SFO / No delays
Rise 6:13AM
Set 8:18PM
Waning crescent
Rise2:11AM
Set6:02PM
WEDNESDAY NIGHT
SFO / No delays
and then 
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