Reporting Station : West Yellowstone Airport, MT
2 Weather Alerts
for your area.
Overcast. Chilly.
Rise 6:04AM
Set 8:37PM
New moon
Rise5:37AM
Set8:38PM
No Airport Delays Found
MAY 7TH, 1988-A powerful storm in the north central U.S. produced up to three feet of snow in the Bighorn Mountains of Wyoming and the mountains of south central Montana. Up to five inches of rain drenched central Montana in less than 24 hours, and flash flooding in Wyoming caused a million dollars damage.
| MAY 7TH, 1988 |
A powerful storm in the north central U.S. produced up to three feet of snow in the Bighorn Mountains of Wyoming and the mountains of south central Montana. Up to five inches of rain drenched central Montana in less than 24 hours, and flash flooding in Wyoming caused a million dollars damage. |
| MAY 7TH, 1840 |
A powerful tornado wrecked many boats at the Natchez Landing in Mississippi, then plowed through the city on the bluff. The tornado killed 317 persons, and caused a million dollars damage. The force of the storm caused houses to burst open. The tornado was the most deadly and destructive in early American history. |
| MAY 6TH, 1933 |
Charleston SC was deluged with 10.57 inches of rain, an all- time 24 hour record for that location. |
| MAY 6TH, 1975 |
A massive tornado hit Omaha NE killing three persons, injuring 133 others, and causing 150 million dollars damage. The tornado struck during the late afternoon moving northeastward through the industrial and residential areas of west central Omaha, and lifting over the northern section of the city. The twister, which cut a swath ten miles long and as much as a quarter of a mile wide, was the mostly costly in U.S. history up til that time. |
| MAY 5TH, 1990 |
A strong Pacific cold front moving rapidly inland caused weather conditions at the east end of the Strait of Juan de Fuca in Washington State to quickly change from sunny and calm to westerly winds of 60 mph and ten-foot waves. Three recreational fishing boats capsized in heavy seas off Port Angeles resulting in five deaths. |
| MAY 5TH, 1917 |
The same storm which a day earlier produced eight inches of snow in the Texas panhandle, produced a foot of snow at Denver CO, their heaviest snow of record for the month of May. |
| MAY 4TH, 1812 |
A storm produced snow from Philadelphia to Maine. A foot of snow fell near Keene NH, and in Massachusetts, nine inches fell at Waltham, located near Boston. |
| MAY 4TH, 1917 |
A late season snowstorm in northwest Texas produced up to eight inches of snow in Potter County and Armstrong County. |
| MAY 3RD, 1990 |
Onslaught of 2 days of heavy rainfall in north central and east Texas causes extensive flooding along the Trinity and Red Rivers and smaller creeks and rivers. In Dallas and Fort Worth areas hundreds are evacuated and 3 die in flooding. |
| MAY 3RD, 1978 |
Persistent thunderstorms caused widespread flooding in southeastern Louisiana and extreme southeastern Mississippi. Rainfall totals of ten to thirteen and a half inches were reported around New Orleans causing the worst flooding in thirty years. The water depth reached three to four feet in several hundred homes, and total property damage was estimated at one hundred million dollars. |
| MAY 2ND, 1929 |
Virginia's worst tornado disaster occurred. Six tornadoes, two of which were west of the Blue Mountains, killed 22 people. Twelve children and a teacher were killed at Rye Cove, in Scott County. Four schools were destroyed by the storms. |
| 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 6:04AM
Set 8:37PM
New moon
Rise5:37AM
Set8:38PM
No Airport Delays Found
| History | |||
| Weather Station: Helena Regional Airport , MT , US | |||
| May Data | Choose another month |
| Averages | |
|
Average High Temperature
-1.70 °C
|
Average Low Temperature
-12.80 °C
|
|
Average Mean Temp
-7.20 °C
|
Average Dew Point
-12.80 °C
|
|
Average Windspeed
16.70 km/h
|
Average Wind Direction
270.0
|
|
Average Morning Relative Humidity
71.0
|
Average Afternoon Relative Humidity
63.0
|
|
Typical Sky Cover
OVR
|
Average Precipitation (US Only)
1.52
|
|
Average Snowfall (US Only)
22.80
|
|
| Daily Counts | |
|
Days With Precipitation
8
|
Days With Thunderstorms
*
|
|
Days With Fog
3
|
Days With Snow
8
|
Days With Lows Below Freezing
29
|
Days above 90° F (32.2° C)
0
|
| Records | |
|
Record High
16.70 °C
|
Record Low
-41.10 °C
|
|
Record Wind Speed
109.30 km/h
|
Record Monthly Snowfall
91.4 cm
|
Record 24-hour Snowfall
22.80 cm
|
Record Monthly Rainfall
71 mm
|
Record 24-hour Rainfall
15 mm
|
Record Minimum Monthly Precipitation
* mm
|
| Averages | |
|
Average High Temperature
2.20 °C
|
Average Low Temperature
-9.40 °C
|
|
Average Mean Temp
-3.30 °C
|
Average Dew Point
-9.40 °C
|
|
Average Windspeed
18.50 km/h
|
Average Wind Direction
270.0
|
|
Average Morning Relative Humidity
72.0
|
Average Afternoon Relative Humidity
56.0
|
|
Typical Sky Cover
OVR
|
Average Precipitation (US Only)
1.02
|
|
Average Snowfall (US Only)
15.20
|
|
| Daily Counts | |
|
Days With Precipitation
7
|
Days With Thunderstorms
*
|
|
Days With Fog
2
|
Days With Snow
6
|
Days With Lows Below Freezing
26
|
Days above 90° F (32.2° C)
0
|
| Records | |
|
Record High
20.00 °C
|
Record Low
-36.10 °C
|
|
Record Wind Speed
101.90 km/h
|
Record Monthly Snowfall
50.8 cm
|
Record 24-hour Snowfall
20.30 cm
|
Record Monthly Rainfall
30 mm
|
Record 24-hour Rainfall
13 mm
|
Record Minimum Monthly Precipitation
* mm
|
| Averages | |
|
Average High Temperature
6.10 °C
|
Average Low Temperature
-6.10 °C
|
|
Average Mean Temp
0.60 °C
|
Average Dew Point
-7.20 °C
|
|
Average Windspeed
18.50 km/h
|
Average Wind Direction
270.0
|
|
Average Morning Relative Humidity
72.0
|
Average Afternoon Relative Humidity
48.0
|
|
Typical Sky Cover
OVR
|
Average Precipitation (US Only)
1.78
|
|
Average Snowfall (US Only)
20.30
|
|
| Daily Counts | |
|
Days With Precipitation
9
|
Days With Thunderstorms
*
|
|
Days With Fog
2
|
Days With Snow
7
|
Days With Lows Below Freezing
28
|
Days above 90° F (32.2° C)
0
|
| Records | |
|
Record High
25.00 °C
|
Record Low
-34.40 °C
|
|
Record Wind Speed
96.30 km/h
|
Record Monthly Snowfall
55.8 cm
|
Record 24-hour Snowfall
22.80 cm
|
Record Monthly Rainfall
41 mm
|
Record 24-hour Rainfall
15 mm
|
Record Minimum Monthly Precipitation
* mm
|
| Averages | |
|
Average High Temperature
13.30 °C
|
Average Low Temperature
-1.10 °C
|
|
Average Mean Temp
6.10 °C
|
Average Dew Point
-3.30 °C
|
|
Average Windspeed
18.50 km/h
|
Average Wind Direction
270.0
|
|
Average Morning Relative Humidity
71.0
|
Average Afternoon Relative Humidity
39.0
|
|
Typical Sky Cover
OVR
|
Average Precipitation (US Only)
2.28
|
|
Average Snowfall (US Only)
15.20
|
|
| Daily Counts | |
|
Days With Precipitation
8
|
Days With Thunderstorms
1
|
|
Days With Fog
1
|
Days With Snow
4
|
Days With Lows Below Freezing
18
|
Days above 90° F (32.2° C)
0
|
| Records | |
|
Record High
29.40 °C
|
Record Low
-17.20 °C
|
|
Record Wind Speed
92.60 km/h
|
Record Monthly Snowfall
53.3 cm
|
Record 24-hour Snowfall
33.00 cm
|
Record Monthly Rainfall
76 mm
|
Record 24-hour Rainfall
25 mm
|
Record Minimum Monthly Precipitation
0.25 mm
|
| Averages | |
|
Average High Temperature
18.30 °C
|
Average Low Temperature
4.40 °C
|
|
Average Mean Temp
11.70 °C
|
Average Dew Point
1.10 °C
|
|
Average Windspeed
18.50 km/h
|
Average Wind Direction
270.0
|
|
Average Morning Relative Humidity
73.0
|
Average Afternoon Relative Humidity
39.0
|
|
Typical Sky Cover
OVR
|
Average Precipitation (US Only)
4.57
|
|
Average Snowfall (US Only)
5.10
|
|
| Daily Counts | |
|
Days With Precipitation
11
|
Days With Thunderstorms
4
|
|
Days With Fog
1
|
Days With Snow
1
|
Days With Lows Below Freezing
4
|
Days above 90° F (32.2° C)
*
|
| Records | |
|
Record High
33.30 °C
|
Record Low
-8.30 °C
|
|
Record Wind Speed
111.10 km/h
|
Record Monthly Snowfall
33.0 cm
|
Record 24-hour Snowfall
33.00 cm
|
Record Monthly Rainfall
155 mm
|
Record 24-hour Rainfall
53 mm
|
Record Minimum Monthly Precipitation
0.76 mm
|
| Averages | |
|
Average High Temperature
23.30 °C
|
Average Low Temperature
8.30 °C
|
|
Average Mean Temp
16.10 °C
|
Average Dew Point
5.00 °C
|
|
Average Windspeed
18.50 km/h
|
Average Wind Direction
270.0
|
|
Average Morning Relative Humidity
73.0
|
Average Afternoon Relative Humidity
39.0
|
|
Typical Sky Cover
OVR
|
Average Precipitation (US Only)
4.82
|
|
Average Snowfall (US Only)
*
|
|
| Daily Counts | |
|
Days With Precipitation
11
|
Days With Thunderstorms
7
|
|
Days With Fog
1
|
Days With Snow
*
|
Days With Lows Below Freezing
*
|
Days above 90° F (32.2° C)
2
|
| Records | |
|
Record High
37.80 °C
|
Record Low
-1.10 °C
|
|
Record Wind Speed
103.70 km/h
|
Record Monthly Snowfall
7.6 cm
|
Record 24-hour Snowfall
7.60 cm
|
Record Monthly Rainfall
109 mm
|
Record 24-hour Rainfall
46 mm
|
Record Minimum Monthly Precipitation
0.25 mm
|
| Averages | |
|
Average High Temperature
28.30 °C
|
Average Low Temperature
11.10 °C
|
|
Average Mean Temp
20.00 °C
|
Average Dew Point
6.70 °C
|
|
Average Windspeed
16.70 km/h
|
Average Wind Direction
270.0
|
|
Average Morning Relative Humidity
67.0
|
Average Afternoon Relative Humidity
30.0
|
|
Typical Sky Cover
CLR
|
Average Precipitation (US Only)
2.79
|
|
Average Snowfall (US Only)
*
|
|
| Daily Counts | |
|
Days With Precipitation
7
|
Days With Thunderstorms
8
|
|
Days With Fog
*
|
Days With Snow
0
|
Days With Lows Below Freezing
0
|
Days above 90° F (32.2° C)
8
|
| Records | |
|
Record High
38.90 °C
|
Record Low
2.20 °C
|
|
Record Wind Speed
129.60 km/h
|
Record Monthly Snowfall
* cm
|
Record 24-hour Snowfall
* cm
|
Record Monthly Rainfall
99 mm
|
Record 24-hour Rainfall
36 mm
|
Record Minimum Monthly Precipitation
0.25 mm
|
| Averages | |
|
Average High Temperature
27.80 °C
|
Average Low Temperature
10.60 °C
|
|
Average Mean Temp
18.90 °C
|
Average Dew Point
6.10 °C
|
|
Average Windspeed
14.80 km/h
|
Average Wind Direction
270.0
|
|
Average Morning Relative Humidity
67.0
|
Average Afternoon Relative Humidity
30.0
|
|
Typical Sky Cover
CLR
|
Average Precipitation (US Only)
3.05
|
|
Average Snowfall (US Only)
0.00
|
|
| Daily Counts | |
|
Days With Precipitation
8
|
Days With Thunderstorms
8
|
|
Days With Fog
*
|
Days With Snow
0
|
Days With Lows Below Freezing
*
|
Days above 90° F (32.2° C)
6
|
| Records | |
|
Record High
40.60 °C
|
Record Low
0.00 °C
|
|
Record Wind Speed
98.20 km/h
|
Record Monthly Snowfall
0.0 cm
|
Record 24-hour Snowfall
0.00 cm
|
Record Monthly Rainfall
107 mm
|
Record 24-hour Rainfall
46 mm
|
Record Minimum Monthly Precipitation
* mm
|
| Averages | |
|
Average High Temperature
21.10 °C
|
Average Low Temperature
5.00 °C
|
|
Average Mean Temp
13.30 °C
|
Average Dew Point
2.20 °C
|
|
Average Windspeed
16.70 km/h
|
Average Wind Direction
270.0
|
|
Average Morning Relative Humidity
72.0
|
Average Afternoon Relative Humidity
36.0
|
|
Typical Sky Cover
CLR
|
Average Precipitation (US Only)
2.54
|
|
Average Snowfall (US Only)
5.10
|
|
| Daily Counts | |
|
Days With Precipitation
7
|
Days With Thunderstorms
2
|
|
Days With Fog
1
|
Days With Snow
1
|
Days With Lows Below Freezing
3
|
Days above 90° F (32.2° C)
1
|
| Records | |
|
Record High
37.20 °C
|
Record Low
-7.80 °C
|
|
Record Wind Speed
87.00 km/h
|
Record Monthly Snowfall
35.5 cm
|
Record 24-hour Snowfall
33.00 cm
|
Record Monthly Rainfall
86 mm
|
Record 24-hour Rainfall
41 mm
|
Record Minimum Monthly Precipitation
0.25 mm
|
| Averages | |
|
Average High Temperature
14.40 °C
|
Average Low Temperature
-0.60 °C
|
|
Average Mean Temp
7.20 °C
|
Average Dew Point
-1.70 °C
|
|
Average Windspeed
16.70 km/h
|
Average Wind Direction
270.0
|
|
Average Morning Relative Humidity
73.0
|
Average Afternoon Relative Humidity
43.0
|
|
Typical Sky Cover
OVR
|
Average Precipitation (US Only)
1.52
|
|
Average Snowfall (US Only)
5.10
|
|
| Daily Counts | |
|
Days With Precipitation
6
|
Days With Thunderstorms
*
|
|
Days With Fog
1
|
Days With Snow
2
|
Days With Lows Below Freezing
17
|
Days above 90° F (32.2° C)
0
|
| Records | |
|
Record High
29.40 °C
|
Record Low
-19.40 °C
|
|
Record Wind Speed
87.00 km/h
|
Record Monthly Snowfall
27.9 cm
|
Record 24-hour Snowfall
17.80 cm
|
Record Monthly Rainfall
69 mm
|
Record 24-hour Rainfall
20 mm
|
Record Minimum Monthly Precipitation
* mm
|
| Averages | |
|
Average High Temperature
5.60 °C
|
Average Low Temperature
-6.10 °C
|
|
Average Mean Temp
0.00 °C
|
Average Dew Point
-6.70 °C
|
|
Average Windspeed
16.70 km/h
|
Average Wind Direction
270.0
|
|
Average Morning Relative Humidity
73.0
|
Average Afternoon Relative Humidity
58.0
|
|
Typical Sky Cover
OVR
|
Average Precipitation (US Only)
1.27
|
|
Average Snowfall (US Only)
15.20
|
|
| Daily Counts | |
|
Days With Precipitation
7
|
Days With Thunderstorms
*
|
|
Days With Fog
2
|
Days With Snow
5
|
Days With Lows Below Freezing
26
|
Days above 90° F (32.2° C)
0
|
| Records | |
|
Record High
22.20 °C
|
Record Low
-39.40 °C
|
|
Record Wind Speed
98.20 km/h
|
Record Monthly Snowfall
83.8 cm
|
Record 24-hour Snowfall
48.20 cm
|
Record Monthly Rainfall
38 mm
|
Record 24-hour Rainfall
15 mm
|
Record Minimum Monthly Precipitation
* mm
|
| Averages | |
|
Average High Temperature
0.00 °C
|
Average Low Temperature
-11.10 °C
|
|
Average Mean Temp
-5.60 °C
|
Average Dew Point
-10.60 °C
|
|
Average Windspeed
16.70 km/h
|
Average Wind Direction
270.0
|
|
Average Morning Relative Humidity
72.0
|
Average Afternoon Relative Humidity
66.0
|
|
Typical Sky Cover
OVR
|
Average Precipitation (US Only)
1.52
|
|
Average Snowfall (US Only)
22.80
|
|
| Daily Counts | |
|
Days With Precipitation
8
|
Days With Thunderstorms
*
|
|
Days With Fog
4
|
Days With Snow
8
|
Days With Lows Below Freezing
30
|
Days above 90° F (32.2° C)
0
|
| Records | |
|
Record High
17.80 °C
|
Record Low
-38.90 °C
|
|
Record Wind Speed
92.60 km/h
|
Record Monthly Snowfall
58.4 cm
|
Record 24-hour Snowfall
25.40 cm
|
Record Monthly Rainfall
38 mm
|
Record 24-hour Rainfall
13 mm
|
Record Minimum Monthly Precipitation
* mm
|
Rise 6:04AM
Set 8:37PM
New moon
Rise5:37AM
Set8:38PM
No Airport Delays Found
| Day | Reason | Upper Soil Moisture | Lower Soil Moisture | |
| Wednesday |  |
Fire danger very low | 35% | 37% |
| Thursday | |
Fire danger very low | 35% | 37% |
| Friday |  |
Fire danger low | 35% | 37% |
| Saturday | |
Fire danger low | 35% | 37% |
| Sunday | |
Fire danger low | 35% | 37% |
| Monday | |
Fire danger very low | 35% | 37% |
Rise 6:04AM
Set 8:37PM
New moon
Rise5:37AM
Set8:38PM
No Airport Delays Found
Rise 6:04AM
Set 8:37PM
New moon
Rise5:37AM
Set8:38PM
No Airport Delays Found
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