Subj : MESO: Mesoscale Discussion 0306 To : wx-storm@lists.illinois.edu From : COD Weather Processor Date : Tue Mar 21 2023 20:57:44 ACUS11 KWNS 212057 SWOMCD SPC MCD 212057=20 MNZ000-SDZ000-NDZ000-220100- Mesoscale Discussion 0306 NWS Storm Prediction Center Norman OK 0357 PM CDT Tue Mar 21 2023 Areas affected...Northeast South Dakota...southeast North Dakota...and west-central Minnesota. Concerning...Heavy snow=20 Valid 212057Z - 220100Z SUMMARY...An area of moderate to heavy snow is expanding across the northern Plains this afternoon/evening. DISCUSSION...Afternoon water vapor imagery shows a shortwave trough moving out of northeast Wyoming and into western South Dakota. Low-level southerly flow has strengthened ahead of this trough with 1km flow increasing from ~15 knots to ~35 kts on the KABR VWP over the past 3-4 hours. As a result, moderate to locally heavy snowfall has expanded across northeast South Dakota this afternoon with heavy snow reported at Aberdeen at 20Z. Expect this area of moderate to heavy snow to increase north-northeastward this evening as isentropic ascent strengthens and a weak surface low develops.=20 Initially, expect heavy snow and 1+ inch per hour snowfall rates to remain isolated with more widespread 1 to 1.5 inch per hour snowfall rates starting between 23-00Z across southeast North Dakota as the system strengthens. ...Bentley/Leitman.. 03/21/2023 ....Please see https://urldefense.com/v3/__http://www.spc.noaa.gov__;!!DZ3fj= g!811hyaURjZ72MRyJPoDE_XdeGotDxDRaj524iIZy_LS_ir4EdmUIggF2-L1tjclmu4UGqpr-k= wfZOaoe8i4Wxy7wm7Y$ for graphic product... ATTN...WFO...FGF...ABR...BIS... LAT...LON 45589993 46899911 47169628 46439564 45219763 45319894 45589993=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) .