ZCZC SPCSWOMCD ALL ACUS11 KWNS 152155 SPC MCD 152155 IAZ000-MOZ000-KSZ000-NEZ000-SDZ000-152330- Mesoscale Discussion 2030 NWS Storm Prediction Center Norman OK 0355 PM CST Wed Dec 15 2021 Areas affected...Portions of far northeastern KS...eastern NE...northwestern MO...western/central IA...and far southeastern SD Concerning...Tornado Watch 563... Valid 152155Z - 152330Z The severe weather threat for Tornado Watch 563 continues. SUMMARY...Widespread damaging winds of 60-85+ mph and the potential for a few tornadoes will spread quickly eastward into western/central Iowa and northwestern Missouri this afternoon. DISCUSSION...Temperatures ahead of a QLCS across eastern NE and northeastern KS have recently warmed into the mid 60s to mid 70s, with surface dewpoints generally in the mid 50s to low 60s. This squall line is expected to remain well organized in the short term given 60-70+ kt of effective bulk shear present across the warm sector. Strong low/mid-level flow attendant to an ejecting shortwave trough will continue to reach the surface through convective downdraft accelerations. Numerous severe wind gusts of 60-85 mph have been observed at multiple surface sites over the past hour or so across northeastern KS and eastern NE. Potential exists for even stronger gusts given 60-70 kt of flow present around 850 mb. Indeed, a recent wind gust to 93 mph was reported at KLNK (Lincoln, NE) as the line moved through. Widespread severe/damaging winds are expected to remain prominent as this line of storms races quickly east-northeastward into western/central IA, northwestern MO, and vicinity over the next couple of hours. Multiple embedded mesovorticies have been noted within the line, as low-level shear remains enhanced (effective SRH around 300-400 m2/s2). A few tornadoes will also remain a threat, especially with any embedded supercell within the line, and a strong tornado cannot be ruled out. ..Gleason.. 12/15/2021 ...Please see www.spc.noaa.gov for graphic product... ATTN...WFO...DMX...EAX...FSD...OAX...TOP... LAT...LON 39139663 40519635 41919673 42449745 43469673 43479419 42089350 41189352 40649379 40079422 39429559 39139663 NNNN