Reporting Station : Leesburg / Godfrey, VA

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AUGUST 15TH, 1967-The "sundance fire" in northern Idaho was started by lightning. Winds of 50 mph carried firebrands as much as ten miles in advance to ignite new fires, and as a result, the forest fire spread twenty miles across the Selkirk Mountains in just twelve hours, burning 56,000 acres. The heat of the fire produced whirlwinds of flame with winds up to 300 mph which flung giant trees about like matchsticks.

Previously
AUGUST 15TH, 1967 The "sundance fire" in northern Idaho was started by lightning. Winds of 50 mph carried firebrands as much as ten miles in advance to ignite new fires, and as a result, the forest fire spread twenty miles across the Selkirk Mountains in just twelve hours, burning 56,000 acres. The heat of the fire produced whirlwinds of flame with winds up to 300 mph which flung giant trees about like matchsticks.
 
AUGUST 15TH, 1787 Tornadoes were reported in Connecticut, Rhode Island, Massachusetts, and New Hampshire. Wethersfield CT was hard hit by the tornado outbreak.
 
AUGUST 14TH, 1936 Temperatures across much of eastern Kansas soared above 110 degrees. Kansas City MO hit an all-time record high of 113 degrees. It was one of sixteen consecutive days of 100 degree heat for Kansas City. During that summer there were a record 53 days of 100 degree heat, and during the three summer months Kansas City received just 1.12 inches of rain.
 
AUGUST 14TH, 1987 Slow moving thunderstorms deluged northern and western suburbs of Chicago IL with torrential rains. O'Hare Airport reported 9.35 inches in 18 hours, easily exceeding the previous 24 hour record of 6.24 inches. Flooding over a five day period resulted in 221 million dollars damage. It was Chicago's worst flash flood event, particularly for northern and western sections of the city.
 
AUGUST 13TH, 1919 High winds and heavy rain struck the Middle Atlantic Coast Region. In New Jersey, winds gusted to 60 mph at Atlantic City, and nine inches of rain fell at Tuckerton. The wind and rain leveled crops and stripped trees of fruit causing several million dollars damage.
 
AUGUST 13TH, 1987 Thunderstorms deluged the Central Gulf Coast States with torrential rains. Thunderstorms in Mississippi drenched Marion County with up to 15 inches of rain during the morning hours, with 12.2 inches reported at Columbia. Floodwaters swept cars away in the Lakeview subdivision of Columbia when the the Lakeview Dam broke. Flash flooding caused more than three million dollars damage in Marion County.
 
AUGUST 12TH, 1778 A Rhode Island hurricane prevented an impending British-French sea battle, and caused extensive damage over southeast New England.
 
AUGUST 12TH, 1955 During the second week of August hurricanes Connie and Diane produced as much as 19 inches of rain in the northeastern U.S. forcing rivers from Virginia to Massachusetts into a high flood. Westfield MA was deluged with 18.15 inches of rain in 24 hours, and at Woonsocket RI the Blackstone River swelled from seventy feet in width to a mile and a half. Connecticut and the Delaware Valley were hardest hit. Total damage in New England was 800 million dollars, and flooding claimed 187 lives.
 
AUGUST 11TH, 1940 A major hurricane struck Savannnah GA and Charleston SC causing the worst inland flooding since 1607.
 
AUGUST 11TH, 1944 The temperature at Burlington VT soared to an all-time record high of 101 degrees.
 
AUGUST 10TH, 1856 A hurricane's 5 ft. storm tide drowns 140 vacationers at Isle Derniere (Last Island) off the Louisiana coast. In 1943, on the same day, lightning kills six soldiers on a drill field at Fort Belvoir, VA.
 
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: Washington-Dulles International Airport , VA , US
August Data Choose another month
Averages
Average High Temperature
4.40 °C
Average Low Temperature
-6.10 °C
Average Mean Temp
-0.60 °C
Average Dew Point
-6.10 °C
Average Windspeed
20.40 km/h
Average Wind Direction
315.0
Average Morning Relative Humidity
76.0
Average Afternoon Relative Humidity
56.0
Typical Sky Cover
OVR
Average Precipitation (US Only)
7.11
Average Snowfall (US Only)
20.30
Daily Counts
Days With Precipitation
10
Days With Thunderstorms
*
Days With Fog
12
Days With Snow
4
Days With Lows Below Freezing
26
Days above 90° F (32.2° C)
0
Records
Record High
23.90 °C
Record Low
-27.80 °C
Record Wind Speed
100.00 km/h
Record Monthly Snowfall
73.6 cm
Record 24-hour Snowfall
27.90 cm
Record Monthly Rainfall
168 mm
Record 24-hour Rainfall
41 mm
Record Minimum Monthly Precipitation
1.02 mm
Averages
Average High Temperature
6.70 °C
Average Low Temperature
-5.00 °C
Average Mean Temp
1.10 °C
Average Dew Point
-5.60 °C
Average Windspeed
20.40 km/h
Average Wind Direction
315.0
Average Morning Relative Humidity
77.0
Average Afternoon Relative Humidity
52.0
Typical Sky Cover
OVR
Average Precipitation (US Only)
7.11
Average Snowfall (US Only)
17.80
Daily Counts
Days With Precipitation
9
Days With Thunderstorms
*
Days With Fog
10
Days With Snow
3
Days With Lows Below Freezing
23
Days above 90° F (32.2° C)
0
Records
Record High
26.10 °C
Record Low
-25.60 °C
Record Wind Speed
85.20 km/h
Record Monthly Snowfall
71.1 cm
Record 24-hour Snowfall
58.40 cm
Record Monthly Rainfall
147 mm
Record 24-hour Rainfall
53 mm
Record Minimum Monthly Precipitation
0.51 mm
Averages
Average High Temperature
12.80 °C
Average Low Temperature
0.00 °C
Average Mean Temp
6.70 °C
Average Dew Point
-1.10 °C
Average Windspeed
20.40 km/h
Average Wind Direction
315.0
Average Morning Relative Humidity
77.0
Average Afternoon Relative Humidity
48.0
Typical Sky Cover
OVR
Average Precipitation (US Only)
7.87
Average Snowfall (US Only)
7.60
Daily Counts
Days With Precipitation
10
Days With Thunderstorms
1
Days With Fog
11
Days With Snow
2
Days With Lows Below Freezing
17
Days above 90° F (32.2° C)
0
Records
Record High
31.70 °C
Record Low
-14.40 °C
Record Wind Speed
98.20 km/h
Record Monthly Snowfall
27.9 cm
Record 24-hour Snowfall
15.20 cm
Record Monthly Rainfall
147 mm
Record 24-hour Rainfall
46 mm
Record Minimum Monthly Precipitation
2.54 mm
Averages
Average High Temperature
18.30 °C
Average Low Temperature
4.40 °C
Average Mean Temp
11.70 °C
Average Dew Point
3.90 °C
Average Windspeed
20.40 km/h
Average Wind Direction
315.0
Average Morning Relative Humidity
77.0
Average Afternoon Relative Humidity
46.0
Typical Sky Cover
OVR
Average Precipitation (US Only)
7.87
Average Snowfall (US Only)
*
Daily Counts
Days With Precipitation
10
Days With Thunderstorms
2
Days With Fog
11
Days With Snow
*
Days With Lows Below Freezing
6
Days above 90° F (32.2° C)
*
Records
Record High
33.30 °C
Record Low
-8.30 °C
Record Wind Speed
109.30 km/h
Record Monthly Snowfall
10.2 cm
Record 24-hour Snowfall
7.60 cm
Record Monthly Rainfall
185 mm
Record 24-hour Rainfall
53 mm
Record Minimum Monthly Precipitation
0.76 mm
Averages
Average High Temperature
23.30 °C
Average Low Temperature
10.00 °C
Average Mean Temp
17.20 °C
Average Dew Point
10.60 °C
Average Windspeed
13.00 km/h
Average Wind Direction
180.0
Average Morning Relative Humidity
82.0
Average Afternoon Relative Humidity
53.0
Typical Sky Cover
OVR
Average Precipitation (US Only)
10.15
Average Snowfall (US Only)
*
Daily Counts
Days With Precipitation
12
Days With Thunderstorms
4
Days With Fog
15
Days With Snow
0
Days With Lows Below Freezing
*
Days above 90° F (32.2° C)
1
Records
Record High
36.10 °C
Record Low
-2.20 °C
Record Wind Speed
85.20 km/h
Record Monthly Snowfall
* cm
Record 24-hour Snowfall
* cm
Record Monthly Rainfall
261 mm
Record 24-hour Rainfall
79 mm
Record Minimum Monthly Precipitation
2.03 mm
Averages
Average High Temperature
28.30 °C
Average Low Temperature
15.00 °C
Average Mean Temp
21.70 °C
Average Dew Point
16.10 °C
Average Windspeed
11.10 km/h
Average Wind Direction
180.0
Average Morning Relative Humidity
84.0
Average Afternoon Relative Humidity
54.0
Typical Sky Cover
OVR
Average Precipitation (US Only)
9.90
Average Snowfall (US Only)
0.00
Daily Counts
Days With Precipitation
10
Days With Thunderstorms
6
Days With Fog
16
Days With Snow
0
Days With Lows Below Freezing
0
Days above 90° F (32.2° C)
5
Records
Record High
37.80 °C
Record Low
2.20 °C
Record Wind Speed
118.50 km/h
Record Monthly Snowfall
0.0 cm
Record 24-hour Snowfall
0.00 cm
Record Monthly Rainfall
462 mm
Record 24-hour Rainfall
279 mm
Record Minimum Monthly Precipitation
1.27 mm
Averages
Average High Temperature
30.60 °C
Average Low Temperature
17.80 °C
Average Mean Temp
24.40 °C
Average Dew Point
18.30 °C
Average Windspeed
11.10 km/h
Average Wind Direction
180.0
Average Morning Relative Humidity
85.0
Average Afternoon Relative Humidity
54.0
Typical Sky Cover
OVR
Average Precipitation (US Only)
8.88
Average Snowfall (US Only)
0.00
Daily Counts
Days With Precipitation
10
Days With Thunderstorms
6
Days With Fog
19
Days With Snow
0
Days With Lows Below Freezing
0
Days above 90° F (32.2° C)
11
Records
Record High
40.00 °C
Record Low
5.00 °C
Record Wind Speed
125.90 km/h
Record Monthly Snowfall
0.0 cm
Record 24-hour Snowfall
0.00 cm
Record Monthly Rainfall
180 mm
Record 24-hour Rainfall
66 mm
Record Minimum Monthly Precipitation
2.28 mm
Averages
Average High Temperature
30.00 °C
Average Low Temperature
17.20 °C
Average Mean Temp
23.30 °C
Average Dew Point
17.80 °C
Average Windspeed
11.10 km/h
Average Wind Direction
180.0
Average Morning Relative Humidity
88.0
Average Afternoon Relative Humidity
55.0
Typical Sky Cover
OVR
Average Precipitation (US Only)
10.15
Average Snowfall (US Only)
0.00
Daily Counts
Days With Precipitation
10
Days With Thunderstorms
5
Days With Fog
21
Days With Snow
0
Days With Lows Below Freezing
0
Days above 90° F (32.2° C)
8
Records
Record High
40.00 °C
Record Low
3.30 °C
Record Wind Speed
109.30 km/h
Record Monthly Snowfall
0.0 cm
Record 24-hour Snowfall
0.00 cm
Record Monthly Rainfall
272 mm
Record 24-hour Rainfall
119 mm
Record Minimum Monthly Precipitation
2.03 mm
Averages
Average High Temperature
26.10 °C
Average Low Temperature
12.80 °C
Average Mean Temp
19.40 °C
Average Dew Point
14.40 °C
Average Windspeed
11.10 km/h
Average Wind Direction
180.0
Average Morning Relative Humidity
89.0
Average Afternoon Relative Humidity
55.0
Typical Sky Cover
OVR
Average Precipitation (US Only)
8.63
Average Snowfall (US Only)
0.00
Daily Counts
Days With Precipitation
8
Days With Thunderstorms
2
Days With Fog
19
Days With Snow
0
Days With Lows Below Freezing
*
Days above 90° F (32.2° C)
3
Records
Record High
37.20 °C
Record Low
-1.10 °C
Record Wind Speed
87.00 km/h
Record Monthly Snowfall
0.0 cm
Record 24-hour Snowfall
0.00 cm
Record Monthly Rainfall
287 mm
Record 24-hour Rainfall
140 mm
Record Minimum Monthly Precipitation
1.52 mm
Averages
Average High Temperature
20.00 °C
Average Low Temperature
5.60 °C
Average Mean Temp
12.80 °C
Average Dew Point
7.20 °C
Average Windspeed
11.10 km/h
Average Wind Direction
180.0
Average Morning Relative Humidity
88.0
Average Afternoon Relative Humidity
52.0
Typical Sky Cover
OVR
Average Precipitation (US Only)
8.38
Average Snowfall (US Only)
*
Daily Counts
Days With Precipitation
8
Days With Thunderstorms
1
Days With Fog
15
Days With Snow
*
Days With Lows Below Freezing
5
Days above 90° F (32.2° C)
*
Records
Record High
32.20 °C
Record Low
-9.40 °C
Record Wind Speed
83.30 km/h
Record Monthly Snowfall
2.5 cm
Record 24-hour Snowfall
2.50 cm
Record Monthly Rainfall
234 mm
Record 24-hour Rainfall
104 mm
Record Minimum Monthly Precipitation
* mm
Averages
Average High Temperature
13.90 °C
Average Low Temperature
1.10 °C
Average Mean Temp
7.80 °C
Average Dew Point
1.70 °C
Average Windspeed
18.50 km/h
Average Wind Direction
315.0
Average Morning Relative Humidity
83.0
Average Afternoon Relative Humidity
54.0
Typical Sky Cover
OVR
Average Precipitation (US Only)
8.12
Average Snowfall (US Only)
2.50
Daily Counts
Days With Precipitation
9
Days With Thunderstorms
1
Days With Fog
12
Days With Snow
1
Days With Lows Below Freezing
15
Days above 90° F (32.2° C)
0
Records
Record High
28.90 °C
Record Low
-12.80 °C
Record Wind Speed
85.20 km/h
Record Monthly Snowfall
27.9 cm
Record 24-hour Snowfall
27.90 cm
Record Monthly Rainfall
198 mm
Record 24-hour Rainfall
61 mm
Record Minimum Monthly Precipitation
0.51 mm
Averages
Average High Temperature
7.20 °C
Average Low Temperature
-3.30 °C
Average Mean Temp
2.20 °C
Average Dew Point
-3.30 °C
Average Windspeed
20.40 km/h
Average Wind Direction
315.0
Average Morning Relative Humidity
78.0
Average Afternoon Relative Humidity
57.0
Typical Sky Cover
OVR
Average Precipitation (US Only)
8.12
Average Snowfall (US Only)
10.20
Daily Counts
Days With Precipitation
10
Days With Thunderstorms
*
Days With Fog
12
Days With Snow
2
Days With Lows Below Freezing
24
Days above 90° F (32.2° C)
0
Records
Record High
25.60 °C
Record Low
-20.00 °C
Record Wind Speed
100.00 km/h
Record Monthly Snowfall
60.9 cm
Record 24-hour Snowfall
27.90 cm
Record Monthly Rainfall
170 mm
Record 24-hour Rainfall
74 mm
Record Minimum Monthly Precipitation
1.02 mm
Day   Reason Upper Soil Moisture Lower Soil Moisture
Monday cw_fire_vlow
Fire danger very low 21% 26%
Tuesday cw_fire_low
Fire danger low 21% 26%
Wednesday cw_fire_low
Fire danger low 21% 26%
Thursday cw_fire_low
Fire danger low 21% 26%
Friday cw_fire_low
Fire danger low 21% 26%
Saturday cw_fire_vlow
Fire danger very low 21% 26%
Snow conditions provided by SnoCountry Mountain Reports™

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