Reporting Station : San Francisco International Airport, CA

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Clear. Refreshingly cool.

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MAY 25TH, 1955-Two tornadoes struck the town of Blackwell OK within a few minutes time during the late evening. The tornadoes killed 18 persons and injured more than 500 others. Early the next morning a tornado virtually obliterated the small community of Udall KS killing 80 persons and injuring 270 persons. More than half the persons in the community were killed or injured by the tornado.

Previously
MAY 25TH, 1955 Two tornadoes struck the town of Blackwell OK within a few minutes time during the late evening. The tornadoes killed 18 persons and injured more than 500 others. Early the next morning a tornado virtually obliterated the small community of Udall KS killing 80 persons and injuring 270 persons. More than half the persons in the community were killed or injured by the tornado.
 
MAY 25TH, 1987 Thunderstorms spawned fifteen tornadoes in West Texas. One thunderstorm spawned a powerful tornado near Gruver TX, along with golf ball size hail and 75 mph winds. A man on a boat on Lake Bistineau in northwest Louisiana was struck and killed by lightning, while the other three persons in the boat were unharmed. The man reportedly stood up in the boat and asked to be struck by lightning.
 
MAY 24TH, 1940 Hail fell near Ada OK to a depth of six to eight inches, and rainfall runoff left drifts of hail up to five feet high.
 
MAY 24TH, 1894 Six inches of snow blanketed Kentucky. Just four days earlier as much as ten inches of snow had fallen across Kentucky, Tennessee and Virginia. Six days earlier a violent storm had wrecked nine ships on Lake Michigan.
 
MAY 23RD, 1882 Eastern Iowa receives 6 in (15 cm) of snow during late season snowstorm.
 
MAY 23RD, 1989 Severe thunderstorms developing along a cold front resulted in 98 reports of large hail and damaging winds in the Northern Plains and Upper Mississippi Valley. Golf ball size hail caused a million dollars damage around Buffalo City WI, baseball size hail was reported at Northfield MN and Randolph MN, and thunderstorm winds gusted to 95 mph at Dunkerton IA.
 
MAY 22ND, 1987 A powerful tornado virtually wiped the small southwest Texas community of Saragosa off the map. The twister destroyed eighty- five percent of the structures in the town killing thirty persons and injuring 121 others in the town of population 183. The tornado hurled trucks and autos through adobe and wood- frame homes, with some vehicles blown 500 feet.
 
MAY 22ND, 1832 Kennebec River discharges 140,000 cu. ft. per second during a flood at Waterville, ME.
 
MAY 21ST, 1860 A swarm of tornadoes occurred in the Ohio Valley. Tornadoes struck the cities of Louisville KY, Cincinnati OH, Chillicothe OH and Marietta OH causing a million dollars damage.
 
MAY 21ST, 1896 The mercury soared to 124 degrees at Salton CA to establish a U.S. record for May.
 
MAY 20TH, 1916 On the same day on this year and again in 1917 and 1918, tornadoes strike Codell, KS.
 
Wind Advisory
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.

History
Weather Station: San Francisco , CA , US
May Data Choose another month
Averages
Average High Temperature
55.94 °F
Average Low Temperature
46.04 °F
Average Mean Temp
51.08 °F
Average Dew Point
* °F
Average Windspeed
* mph
Average Wind Direction
*
Average Morning Relative Humidity
*
Average Afternoon Relative Humidity
*
Typical Sky Cover
*
Average Precipitation (US Only)
4.10
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
78.98 °F
Record Low
30.02 °F
Record Wind Speed
-113.65 mph
Record Monthly Snowfall
* "
Record 24-hour Snowfall
* "
Record Monthly Rainfall
10.72 "
Record 24-hour Rainfall
3.19 "
Record Minimum Monthly Precipitation
0.50 "
Averages
Average High Temperature
60.08 °F
Average Low Temperature
48.02 °F
Average Mean Temp
53.96 °F
Average Dew Point
* °F
Average Windspeed
* mph
Average Wind Direction
*
Average Morning Relative Humidity
*
Average Afternoon Relative Humidity
*
Typical Sky Cover
*
Average Precipitation (US Only)
3.50
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
80.96 °F
Record Low
30.92 °F
Record Wind Speed
-113.65 mph
Record Monthly Snowfall
* "
Record 24-hour Snowfall
* "
Record Monthly Rainfall
10.09 "
Record 24-hour Rainfall
2.09 "
Record Minimum Monthly Precipitation
* "
Averages
Average High Temperature
60.98 °F
Average Low Temperature
48.92 °F
Average Mean Temp
55.04 °F
Average Dew Point
* °F
Average Windspeed
* mph
Average Wind Direction
*
Average Morning Relative Humidity
*
Average Afternoon Relative Humidity
*
Typical Sky Cover
*
Average Precipitation (US Only)
2.90
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
84.02 °F
Record Low
35.06 °F
Record Wind Speed
-113.65 mph
Record Monthly Snowfall
* "
Record 24-hour Snowfall
* "
Record Monthly Rainfall
8.98 "
Record 24-hour Rainfall
2.48 "
Record Minimum Monthly Precipitation
* "
Averages
Average High Temperature
62.96 °F
Average Low Temperature
50.00 °F
Average Mean Temp
55.94 °F
Average Dew Point
* °F
Average Windspeed
* mph
Average Wind Direction
*
Average Morning Relative Humidity
*
Average Afternoon Relative Humidity
*
Typical Sky Cover
*
Average Precipitation (US Only)
1.50
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
93.92 °F
Record Low
39.92 °F
Record Wind Speed
10.35 mph
Record Monthly Snowfall
0.0 "
Record 24-hour Snowfall
0.00 "
Record Monthly Rainfall
5.52 "
Record 24-hour Rainfall
2.01 "
Record Minimum Monthly Precipitation
* "
Averages
Average High Temperature
64.04 °F
Average Low Temperature
51.08 °F
Average Mean Temp
57.92 °F
Average Dew Point
* °F
Average Windspeed
* mph
Average Wind Direction
*
Average Morning Relative Humidity
*
Average Afternoon Relative Humidity
*
Typical Sky Cover
*
Average Precipitation (US Only)
0.50
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
96.08 °F
Record Low
44.06 °F
Record Wind Speed
-113.65 mph
Record Monthly Snowfall
0.0 "
Record 24-hour Snowfall
0.00 "
Record Monthly Rainfall
4.02 "
Record 24-hour Rainfall
1.42 "
Record Minimum Monthly Precipitation
0.00 "
Averages
Average High Temperature
66.02 °F
Average Low Temperature
53.06 °F
Average Mean Temp
60.08 °F
Average Dew Point
* °F
Average Windspeed
* mph
Average Wind Direction
*
Average Morning Relative Humidity
*
Average Afternoon Relative Humidity
*
Typical Sky Cover
*
Average Precipitation (US Only)
0.20
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
100.94 °F
Record Low
46.94 °F
Record Wind Speed
-113.65 mph
Record Monthly Snowfall
0.0 "
Record 24-hour Snowfall
0.00 "
Record Monthly Rainfall
1.42 "
Record 24-hour Rainfall
1.30 "
Record Minimum Monthly Precipitation
0.00 "
Averages
Average High Temperature
66.02 °F
Average Low Temperature
53.96 °F
Average Mean Temp
60.08 °F
Average Dew Point
* °F
Average Windspeed
* mph
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
102.92 °F
Record Low
46.94 °F
Record Wind Speed
-113.65 mph
Record Monthly Snowfall
0.0 "
Record 24-hour Snowfall
0.00 "
Record Monthly Rainfall
0.20 "
Record 24-hour Rainfall
0.12 "
Record Minimum Monthly Precipitation
0.00 "
Averages
Average High Temperature
66.02 °F
Average Low Temperature
53.96 °F
Average Mean Temp
60.98 °F
Average Dew Point
* °F
Average Windspeed
* mph
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
96.08 °F
Record Low
48.02 °F
Record Wind Speed
-113.65 mph
Record Monthly Snowfall
0.0 "
Record 24-hour Snowfall
0.00 "
Record Monthly Rainfall
0.51 "
Record 24-hour Rainfall
0.51 "
Record Minimum Monthly Precipitation
0.00 "
Averages
Average High Temperature
69.98 °F
Average Low Temperature
55.94 °F
Average Mean Temp
62.96 °F
Average Dew Point
* °F
Average Windspeed
* mph
Average Wind Direction
*
Average Morning Relative Humidity
*
Average Afternoon Relative Humidity
*
Typical Sky Cover
*
Average Precipitation (US Only)
0.20
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
100.94 °F
Record Low
48.02 °F
Record Wind Speed
-113.65 mph
Record Monthly Snowfall
0.0 "
Record 24-hour Snowfall
0.00 "
Record Monthly Rainfall
2.09 "
Record 24-hour Rainfall
2.01 "
Record Minimum Monthly Precipitation
0.00 "
Averages
Average High Temperature
69.08 °F
Average Low Temperature
55.04 °F
Average Mean Temp
62.06 °F
Average Dew Point
* °F
Average Windspeed
* mph
Average Wind Direction
*
Average Morning Relative Humidity
*
Average Afternoon Relative Humidity
*
Typical Sky Cover
*
Average Precipitation (US Only)
1.10
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
102.02 °F
Record Low
42.98 °F
Record Wind Speed
10.35 mph
Record Monthly Snowfall
0.0 "
Record 24-hour Snowfall
0.00 "
Record Monthly Rainfall
5.52 "
Record 24-hour Rainfall
2.29 "
Record Minimum Monthly Precipitation
* "
Averages
Average High Temperature
64.04 °F
Average Low Temperature
51.08 °F
Average Mean Temp
57.92 °F
Average Dew Point
* °F
Average Windspeed
* mph
Average Wind Direction
*
Average Morning Relative Humidity
*
Average Afternoon Relative Humidity
*
Typical Sky Cover
*
Average Precipitation (US Only)
2.60
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
86.00 °F
Record Low
39.02 °F
Record Wind Speed
-113.65 mph
Record Monthly Snowfall
0.0 "
Record 24-hour Snowfall
0.00 "
Record Monthly Rainfall
8.20 "
Record 24-hour Rainfall
2.48 "
Record Minimum Monthly Precipitation
0.00 "
Averages
Average High Temperature
57.02 °F
Average Low Temperature
46.94 °F
Average Mean Temp
51.98 °F
Average Dew Point
* °F
Average Windspeed
* mph
Average Wind Direction
*
Average Morning Relative Humidity
*
Average Afternoon Relative Humidity
*
Typical Sky Cover
*
Average Precipitation (US Only)
3.90
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
75.92 °F
Record Low
26.96 °F
Record Wind Speed
10.35 mph
Record Monthly Snowfall
2.5 "
Record 24-hour Snowfall
0.98 "
Record Monthly Rainfall
11.50 "
Record 24-hour Rainfall
3.11 "
Record Minimum Monthly Precipitation
0.00 "
Day   Reason Upper Soil Moisture Lower Soil Moisture
Wednesday cw_fire_low
Fire danger low 18% 27%
Thursday cw_fire_low
Fire danger low 18% 27%
Friday cw_fire_moderate
Fire danger moderate 18% 27%
Saturday cw_fire_moderate
Fire danger moderate 18% 27%
Sunday cw_fire_moderate
Fire danger moderate 18% 27%
Monday cw_fire_moderate
Fire danger moderate 18% 27%
Snow conditions provided by SnoCountry Mountain Reports™

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