ACUS11 KWNS 230546
SWOMCD
SPC MCD 230545=20
WIZ000-MNZ000-IAZ000-SDZ000-231115-

Mesoscale Discussion 0182
NWS Storm Prediction Center Norman OK
1145 PM CST Wed Feb 22 2023

Areas affected...Southeast SD...southern/central MN...northwest
WI...extreme northwest IA

Concerning...Heavy snow=20

Valid 230545Z - 231115Z

SUMMARY...Snow rates may occasionally increase to 1+ inches per hour
overnight, with localized blizzard conditions.

DISCUSSION...A long-duration snow event is ongoing across parts of
the northern Plains and upper MS Valley late this evening, with
moderate to locally heavy snow occasionally being observed from
eastern SD into southern MN, to the north of a surface low over
southern IA. Some uptick in snow rates is possible overnight, as
large-scale ascent increases in advance of a negatively tilted
mid/upper-level shortwave trough currently moving into central NE.=20

A baroclinic zone has persisted near the MN/SD border this evening,
with temperatures generally in the 0-10 F range across southeast SD,
and in the 10-20 F range across southern MN. Snow rates may approach
1 inch per hour at times within the colder/drier regime across
eastern SD, where gusty winds will support localized blizzard
conditions through the night. Somewhat greater potential for 1 inch
per hour snow rates may develop overnight across southern/central MN
into western WI, where NAM/RAP forecast soundings indicate some
deepening of the dendritic growth zone with time, and also some
potential for modest convective enhancement in association with
steep midlevel lapse rates attendant to the approaching shortwave
trough.

..Dean.. 02/23/2023

...Please see https://urldefense.com/v3/__http://www.spc.noaa.gov__;!!DZ3fj= g!-e7C4zDln8W3ORc8LCUGz1cXvbyeyQd_PBzGKzfy9jnQaIr9yZAlZlMjIAwVZlOS3xR59w-tb= 0REO3e6KzxUWNPWj58$ for graphic product...

ATTN...WFO...DLH...ARX...MPX...DMX...FSD...ABR...

LAT...LON 42989655 43039766 43379819 43909849 44819722 45199663
46309273 46029141 45019084 44239151 44089234 43739382
42989655=20


=3D =3D =3D
To unsubscribe from WX-STORM and you already have a login, go to https://lists.illinois.edu and use the "Unsubscribe" link. Otherwise email Chris Novy at cnovy@cox.net and ask to be removed from WX-STORM.

--- SBBSecho 3.14-Linux
* Origin: capitolcityonline.net * Telnet/SSH:2022/HTTP (1:2320/105)