260 
FGUS75 KTFX 071257
ESFTFX
MTC031-080300-

Hydrologic Outlook
National Weather Service Great Falls MT
657 AM MDT Fri May 7 2021

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

A weather system approaching from the Pacific Northwest will create 
an increasingly moist and unstable environment over Central and 
Southwest Montana this afternoon through Saturday. There is the 
possibility during the afternoon to early evening hours of heavy 
rainfall that could cause impacts within and downstream of the 
Bridger Foothills Fire burn scar area. 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.
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