and then 
to Add to home screen MAY 19TH, 1955-Lake Maloya NM received 11.28 inches of rain in 24 hours to establish a state record.
Rise 5:51AM
Set 8:51PM
Reporting Station : West Yellowstone Airport, MT
There are
0 Weather Alerts
for your area.
0 Weather Alerts
for your area.
7°C
More clouds than sun. Quite cool.
- 39%
- 17 km/hWNW
-
39%
Humidity -
-6°C
Dew Point -
4°C
Comfort Level -
16 km
Visibility -
1012.19 mb
Barometric Pressure - Air Quality
Waxing gibbous
Rise5:09PM
Set4:00AM
No Airport Delays Found
Previously
| MAY 19TH, 1955 |
Lake Maloya NM received 11.28 inches of rain in 24 hours to establish a state record. |
| MAY 19TH, 1780 |
The infamous "dark day" in New England tradition. At noon it was nearly as dark as night. Chickens went to roost, and many persons were fearful of divine wrath. The phenomena was caused by forest fires to the west of New England. |
| MAY 18TH, 1980 |
Mount Saint Helens (in Washington State) erupted spewing ash and smoke sixty-three thousand feet into the air. Heavy ash covered the ground to the immediate northwest, and small particles were carried to the Atlantic coast. |
| MAY 18TH, 1825 |
A tornado (said to have crossed all of the state of Ohio) smashed into the log cabin settlement of Burlington, northeast of Columbus. |
| MAY 17TH, 1883 |
A three day flood in the Black Hills of western South Dakota resulted in a million dollars damage at Rapid City. |
| MAY 17TH, 1979 |
A reading of 12 degrees at Mauna Kea Observatory established an all-time record low for the state of Hawaii. |
| MAY 16TH, 1952 |
High winds in the Wasatch Canyon of Utah struck Ogden and Brigham City. Winds at Hill Air Force Base gusted to 92 mph. |
| MAY 16TH, 1874 |
The Mill Creek disaster occurred west of Northhampton MA. Dam slippage resulted in a flash flood which claimed 143 lives, and caused a million dollars property damage. |
| MAY 15TH, 1834 |
The Northern Atlantic Coast States were in the midst of their greatest May snowstorm of record. The hills around Newbury VT were covered with two to three feet of snow. |
| MAY 15TH, 1972 |
The worst ice jam flooding of memory for long-time residents took place along the Kuskokwim River and Yukon River in Alaska. It was the first time since 1890 that the two rivers "flowed as one". The towns of Oscarville and Napaskiak were completely inundated. |
| MAY 14TH, 1896 |
The mercury plunged to 10 degrees below zero at Climax CO. It was the lowest reading of record for the U.S. during the month of May. |
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.
Rise 5:51AM
Set 8:51PM
Waxing gibbous
Rise5:09PM
Set4:00AM
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 5:51AM
Set 8:51PM
Waxing gibbous
Rise5:09PM
Set4:00AM
No Airport Delays Found
| Day | Reason | Upper Soil Moisture | Lower Soil Moisture | |
| Sunday |  |
Fire danger low | 27% | 44% |
| Monday |  |
Fire danger very low | 27% | 44% |
| Tuesday | |
Fire danger very low | 27% | 44% |
| Wednesday | |
Fire danger very low | 27% | 44% |
| Thursday | |
Fire danger very low | 27% | 44% |
| Friday | |
Fire danger very low | 27% | 44% |
Rise 5:51AM
Set 8:51PM
Waxing gibbous
Rise5:09PM
Set4:00AM
No Airport Delays Found
Rise 5:51AM
Set 8:51PM
Waxing gibbous
Rise5:09PM
Set4:00AM
No Airport Delays Found
Snow conditions provided by SnoCountry Mountain Reports™