Overcast with rain, then a chance of a thunderstorm and rain showers in the afternoon. High of 64F. Breezy. Winds from the ESE at 15 to 20 mph. Chance of rain 60%.
Overcast with a chance of a thunderstorm and rain, then rain showers after midnight. Fog overnight. Low of 43F. Winds from the NE at 5 to 15 mph shifting to the WNW after midnight. Chance of rain 90% with rainfall amounts near 0.3 in. possible.
Friday
Partly cloudy with a chance of rain, then a chance of a thunderstorm and a chance of rain in the afternoon. High of 64F. Breezy. Winds from the WSW at 15 to 20 mph. Chance of rain 30%.
Partly cloudy. Low of 39F. Winds from the SW at 5 to 10 mph.
Saturday
Partly cloudy with a chance of a thunderstorm and a chance of rain in the afternoon. High of 72F. Winds from the WNW at 5 to 10 mph shifting to the ENE in the afternoon. Chance of rain 20%.
Overcast with a chance of a thunderstorm and rain in the evening, then partly cloudy with a chance of a thunderstorm and rain. Low of 46F. Winds from the NNE at 5 to 10 mph shifting to the NW after midnight. Chance of rain 70% with rainfall amounts near 0.5 in. possible.
Sunday
Partly cloudy with a chance of a thunderstorm and rain. High of 66F. Winds from the NW at 5 to 10 mph. Chance of rain 60% with rainfall amounts near 0.2 in. possible.
Sunday Night
Partly cloudy with a chance of a thunderstorm and rain, then a chance of rain after midnight. Low of 43F. Winds less than 5 mph. Chance of rain 50% with rainfall amounts near 0.2 in. possible.
Monday
Overcast with a chance of rain, then a chance of a thunderstorm and rain in the afternoon. High of 66F. Winds from the WSW at 5 to 10 mph shifting to the NNE in the afternoon. Chance of rain 70% with rainfall amounts near 0.2 in. possible.
Monday Night
Partly cloudy with a chance of a thunderstorm. Low of 43F. Winds less than 5 mph. Chance of rain 40%.
Tuesday
Partly cloudy with a chance of a thunderstorm. High of 73F. Winds from the SSE at 5 to 10 mph. Chance of rain 20%.
Tuesday Night
Mostly cloudy with a chance of a thunderstorm. Low of 48F. Winds from the SSW at 5 to 10 mph. Chance of rain 60% with rainfall amounts near 0.3 in. possible.
Wednesday
Partly cloudy with a chance of a thunderstorm. High of 63F. Winds less than 5 mph. Chance of rain 40%.
Wednesday Night
Overcast with a chance of a thunderstorm. Low of 45F. Winds less than 5 mph. Chance of rain 70% with rainfall amounts near 0.6 in. possible.
Thursday
Mostly cloudy with a chance of a thunderstorm. High of 59F. Winds from the NNW at 5 to 10 mph. Chance of rain 40% with rainfall amounts near 0.3 in. possible.
Thursday Night
Overcast with a chance of a thunderstorm. Low of 43F. Winds from the WNW at 5 to 10 mph. Chance of rain 40% with rainfall amounts near 0.6 in. possible.
Friday
Overcast with a chance of a thunderstorm. High of 54F. Winds from the WNW at 10 to 15 mph. Chance of rain 30%.
Friday Night
Mostly cloudy with a chance of a thunderstorm. Fog overnight. Low of 39F. Winds from the WNW at 5 to 10 mph. Chance of rain 30%.
Saturday
Partly cloudy with a chance of a thunderstorm. High of 55F. Winds from the NW at 5 to 10 mph. Chance of rain 20%.
Saturday Night
Partly cloudy. Fog overnight. Low of 39F. Winds less than 5 mph.
Sunday
Clear. High of 57F. Winds less than 5 mph.
Sunday Night
Clear. Fog overnight. Low of 39F. Winds less than 5 mph.
There are currently no warnings or advisories for this location.
Public Information Statement
1 7 1991 and may 14 2013 than winds from thunderstorms... the weekend in may 2011 probably produced the strongest easterly-component winds of record at Cut Bank... Bozeman... Havre. Lewistown has seen stronger east winds this year.
Occurrences of last time of strong east winds...
Cut Bank... on may 14 2011 winds were sustained at 29 mph. There are no records indicating east winds as strong as those recorded on the evening of may 22 2013... 32 mph.
Bozeman... on October 3 2009 winds were east at 27 with gusts to 33 mph. Other than thunderstorms... there is no higher sustained easterly winds on record other than on may 15 2011. There have been eleven hours of sustained easterly winds of more than 25 mph since 1999. On may 22 2013 the strongest sustained east wind was 22 mph.
Havre... on April 29 1948 winds were sustained from the east at 36 mph. There are no records indicating east winds of the strength recorded on may 15 2011... 37 mph. From 1970 through 2012 there were only 13 hours of sustained easterly winds of more than 25 mph. On may 22 and 23 2013 there were nine hours of sustained easterly winds of 30 mph or greater.
Lewistown... on April 2 2003 winds were from the east at 32 with gusts to 38 mph. On may 15 2011... winds were sustained at 22 mph. There are no records indicating east winds as strong as those recorded on may 23 2013... 36 mph. In may 2011 there were eight hours sustained easterly winds of 30 mph or greater. This year on may 22 and 23 there have been seven hours.
To further highlight the rarity of strong east winds... historical percentages of occurrence illustrate this. The following table shows the percentage of time that easterly and westerly-component sustained winds of 25 mph or greater... and any speed... occur.
East east-component west west-component >25mph any spd >25mph any spd >25mph any spd >25mph any spd Bozeman 0 pct 11 pct <0.1 21 pct 0.1 15 pct 0.1 23 pct Cut Bank 0 pct 7 pct <0.1 11 pct 0 45 pct 8 53 pct grt falls 0 9 pct <0.1 14 pct 2 24 pct 4 49 pct Havre 0 21 pct 0.1 25 pct 1 31 pct 1 51 pct Lewistown 0.1 20 pct 0.1 25 pct 1 30 pct 2 46 pct
Key: east = east-northeast through east-southeast directions west = west-southwest through west-northwest directions east component = northeast through southeast directions west component = southwest through northwest directions
This table shows that at Great Falls... sustained east winds of 25 mph or greater occur less than 0.1 percent of the hours in the year... sustained 25 mph northeast through southeast winds occur 2 percent of the year... and west winds occur 49 percent of the hours in the year.
