MD 0221 CONCERNING SNOW SQUALL FOR NORTHERN MONTANA
Mesoscale Discussion 0221
NWS Storm Prediction Center Norman OK
0349 PM CST Mon Mar 07 2022
Areas affected...Northern Montana
Concerning...Snow Squall
Valid 072149Z - 080145Z
SUMMARY...Scattered snow showers and strong winds will result in
periods of reduced visibility across northern Montana this afternoon
and into the evening hours.
DISCUSSION...Latest surface observations from southern Alberta show
a cold front pushing south into northern MT. Visible satellite
imagery also shows the southward progression of this front with a
large swath of stratus moving into northern MT. A few surface
observations and web cams from southern Alberta show pockets of
moderate snow under this stratus with marginal visibility
reductions. Blowing snow model probabilities suggest that visibility
reductions down to one mile are possible as temperatures fall into
the low 30s with winds gust to near 30-35 mph and concurrently
falling snow. Latest hi-res forecasts hint that more
widespread/heavier snow showers are possible across northern MT this
evening as low-level lapse rates steepen behind the front, providing
a shallow layer of instability to help locally augment snowfall
rates. This may result in pockets of more substantial visibility
reductions closer to 0.25 mile.
..Moore.. 03/07/2022
...Please see www.spc.noaa.gov for graphic product...
ATTN...WFO...GGW...TFX...MSO...
LAT...LON 49071315 49111092 49120968 48640881 47880849 47370921
47161057 47261212 47581303 48141377 48731392 49081394
49071315
