ZCZC SPCSWOMCD ALL
ACUS11 KWNS 012305 
SPC MCD 012305 
NDZ000-SDZ000-MTZ000-020030-

Mesoscale Discussion 1810
NWS Storm Prediction Center Norman OK
0605 PM CDT Tue Aug 01 2023

Areas affected...Portions of western North Dakota and eastern
Montana

Concerning...Severe Thunderstorm Watch 578...

Valid 012305Z - 020030Z

The severe weather threat for Severe Thunderstorm Watch 578
continues.

SUMMARY...A cluster of supercells with large hail and severe wind
gusts will continue southeast this evening.

DISCUSSION...A cluster of supercells has developed along and
slightly ahead of a surface low and cold front across eastern
Montana and western North Dakota. The strongest supercell, along the
McKenzie and Mountrail county line, appears to be tracking along the
cold front as it drifts south. The southward progression of this
cold front, combined with an increasingly unstable airmass across
southern North Dakota, should keep this activity ongoing well after
sunset. 

Additional thunderstorms may develop over the next 1 to 2 hours
south of the surface low across eastern Montana where high-based
cumulus can be seen on visible satellite imagery. Very high dewpoint
depressions in this region will support some strong downdrafts, but
weak shear and limited instability should mitigate a more organized
severe weather threat from any storms which develop in this region.

..Bentley/Grams.. 08/01/2023

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

ATTN...WFO...ABR...BIS...UNR...BYZ...GGW...

LAT...LON   45750337 45220455 45180576 45670614 46320604 47200550
            47950485 48570327 48310183 47120080 46200065 45920170
            45750337 

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