SPC MD 44

SPC MD 44

MD 0044 CONCERNING HEAVY SNOW FOR PORTIONS OF NORTHERN IDAHO INTO EXTREME WESTERN MONTANA

Mesoscale Discussion 0044
NWS Storm Prediction Center Norman OK
1125 AM CST Thu Jan 11 2024

Areas affected…portions of northern Idaho into extreme western
Montana

Concerning…Heavy snow

Valid 111725Z – 112030Z

SUMMARY…Heavy snow should continue for at least a few more hours,
with 1-2 inch/hr snowfall rates common. Reduced visibility is likely
in the heavier snow bands.

DISCUSSION…A low-level cyclone is drifting southeast across the
Idaho Panhandle into extreme western Montana as a mid-level impulse
traverses the International border, providing deep-layer ascent.
Latest mesoanalysis and RAP forecast soundings characterize vertical
profiles as near saturated, with deep-layer steep lapse rates,
supporting a sufficiently deep and moist dendritic growth zone to
support continued 1-2 inch/hr snowfall rates given strong lift in
place. Latest high-resolution guidance suggests that at least brief
bouts of heavy snow and perhaps reduced visibility should continue
through at least 21Z.

..Squitieri.. 01/11/2024

…Please see www.spc.noaa.gov for graphic product…

ATTN…WFO…MSO…OTX…

LAT…LON 46821614 47311678 47791724 48091710 48401652 48321593
47821523 47331468 46911470 46791560 46821614

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