MD 2256 CONCERNING HEAVY SNOW FOR EASTERN MINNESOTA...WESTERN/CENTRAL WISCONSIN


Mesoscale Discussion 2256
NWS Storm Prediction Center Norman OK
0712 PM CST Tue Dec 09 2025

Areas affected...eastern Minnesota...western/central Wisconsin

Concerning...Heavy snow 

Valid 100112Z - 100415Z

SUMMARY...Heavy snow to continue through the evening with occasional
1"/hr rates.

DISCUSSION...Heavy to moderate snow continues to be reported across
portions of eastern MN into central WI as of 01z. The surface low
continues to shift south and eastward, currently located over
southern MN. 750-850 mb frontogenesis is maximized across far
eastern MN into portions of central WI. 00z sounding from MPX shows
a nearly saturated dendritic growth zone. Moist profiles and
continued frontal support will continue to bring potential for heavy
bands with 1"/hr rates over the next few hours. As the surface low
continues to shift south and east, rates will decrease through the
late evening/overnight.

..Thornton.. 12/10/2025

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

ATTN...WFO...GRB...MKX...DLH...ARX...MPX...

LAT...LON   45168976 45809185 45779315 44449368 44309332 43519148
            43189063 42818973 43488872 44668880 45168976

SPC 0100Z Day 1 Outlook

Day 1 Convective Outlook  
NWS Storm Prediction Center Norman OK
0649 PM CST Tue Dec 09 2025

Valid 100100Z - 101200Z

...NO THUNDERSTORM AREAS FORECAST...

...SUMMARY...
Thunderstorms are not forecast through tonight.

...Discussion...
A fast moving surface low, associated with a strong mid-level jet
streak, will continue to move east-southeastward toward the western
Great Lakes this evening. Forecast soundings show some very weak
elevated instability within the warm sector, but it does not appear
instability will be deep enough for sufficient charge separation for
any thunderstorm activity. Elsewhere in the CONUS, thunderstorm
activity will be minimal without significant instability in place.
Some lightning has occurred south of the Florida Keys, in the
vicinity of the stalled surface front. However, the lightning
activity has remained well offshore and is expected to remain so.

..Bentley.. 12/10/2025