SPC MD 2058



MD 2058 CONCERNING HEAVY SNOW FOR CENTRAL THROUGH SOUTH CENTRAL MONTANA INTO NORTHWEST WYOMING

MD 2058 Image

Mesoscale Discussion 2058
NWS Storm Prediction Center Norman OK
0552 AM CDT Wed Oct 09 2019

Areas affected...central through south central Montana into
northwest Wyoming

Concerning...Heavy snow 

Valid 091052Z - 091445Z

SUMMARY...Areas of moderate to heavy snow should persist from
central through south central Montana into northwest Wyoming through
mid morning with rates up to or occasionally exceeding 1 inch per
hour.

DISCUSSION...The winter storm appears to be in the process of
reorganizing early this morning with a band of mid-level
frontogenetic forcing located from northwest WY into central MT
spreading very slowly southeast. Water vapor imagery indicates
primary zone of deeper forcing for ascent accompanying a progressive
shortwave trough is advancing eastward and coincides with band of
maximum frontogenetic forcing. Snowfall rates should be augmented
within this corridor of ascent through mid morning. Moreover, a
northerly post-frontal upslope component suggests snowfall rates
will probably be maximized along the northward facing slopes of the
mountains in northwest WY and southwest through south central MT
next few hours.

..Dial.. 10/09/2019

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

ATTN...WFO...BYZ...GGW...RIW...TFX...

LAT...LON   46170758 44500921 44531055 45591069 47030903 47200725
            46170758 

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