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Hazardous Weather Outlook

Hazardous Weather Outlook
National Weather Service Billings MT
328 PM MDT Thu May 6 2021

Musselshell-Northern Stillwater-Northern Park-Golden Valley-
Judith Gap-Paradise Valley-Livingston Area-Beartooth Foothills-
Absaroka/Beartooth Mountains-Crazy Mountains-Northern Sweet Grass-
Melville Foothills-Northeastern Yellowstone-Southern Wheatland-
Southwestern Yellowstone-
328 PM MDT Thu May 6 2021

This Hazardous Weather Outlook is for portions of central Montana
and south central Montana.

* WHAT... Strong thunderstorms with an isolated severe thunderstorm possible.

* WHERE...Portions of south central Montana.

* WHEN...Friday afternoon into evening.

* ADDITIONAL DETAILS...Strong thunderstorms with the potential for
  an isolated severe storm are possible with the most likely area
  of development along and west of Billings. Expect hail up to 1
  inch and wind gusts to 60 mph with the strongest storms.


Be sure to stay tuned for further updates on this potential
hazardous weather.

Additional graphics can be found at:



Hazardous Weather Outlook
National Weather Service Spokane WA
503 AM PDT Thu May 6 2021

Northern Panhandle-Coeur d`Alene Area-Idaho Palouse-
Central Panhandle Mountains-Lewiston Area-
Lewis and Southern Nez Perce Counties-Northeast Blue Mountains-
Lower Garfield and Asotin Counties-Washington Palouse-
Moses Lake Area-Upper Columbia Basin-Spokane Area-
Northeast Mountains-Okanogan Highlands-
503 AM PDT Thu May 6 2021

This Hazardous Weather Outlook is for portions of North Idaho...
North Central Idaho...East Central Washington...North Central
Washington...Northeast Washington and Southeast Washington.


A vigorous cold front will move through the Inland Northwest this
afternoon and evening bringing gusty west to southwest winds
across the Columbia Basin into the Spokane area. Potential for
blowing dust and reduced visibility will be possible this
afternoon and evening.

Scattered high based rain showers and thunderstorms will be
possible this afternoon and evening. Lightning and gusty winds
will be the dominating features with these storms. Brief down
pours of rain will be possible but overall very light
precipitation is expected.


Cooler temperatures will settle in behind the cold front with
daytime temperatures on Friday topping out about 15 to 20 degrees
cooler than readings observed on Thursday.


Hydrologic Outlook

Hydrologic Outlook

Hydrologic Outlook
National Weather Service Great Falls MT
1117 AM MDT Thu May 6 2021

...Heavy Rainfall Rates Possible over the Bridger Foothills Fire
Burn Scar Area Friday Afternoon...

A weather system approaching from the Pacific Northwest will create
an increasingly moist and unstable environment over Central and
Southwest Montana Friday afternoon through Saturday. There is the
possibility during the afternoon to early evening hours on Friday of
heavy rainfall that could cause impacts within and downstream of the
Bridger Foothills Fire burn scar area. This potential threat is
highly uncertain because of the localized nature of heavier rain
showers or thunderstorms. If precipitation develops with peak
instability during the afternoon, thunderstorm coverage and rainfall
rates could be higher. Those living within or downstream of the
Bridger Foothills Fire Burn Scar should remain aware of changing
conditions through the evening hours on Friday. Any rainfall rates
in excess of 0.50 per hour increases the possibility of flash
flooding and debris flows in basins affected by the fire. At this
time, it seems unlikely that those rainfall rates will be met, but
not out of the question. Steady, light to moderate precipitation
continues overnight into Saturday, but the chance for rain related
impacts will decrease as rain changes to snow and begins to
accumulate at elevations down to, or below 5000 feet.


U.S. Dept. of Commerce
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