ACUS11 KWNS 142319
SWOMCD
SPC MCD 142318
IAZ000-MOZ000-NEZ000-KSZ000-150015-

Mesoscale Discussion 2295
NWS Storm Prediction Center Norman OK
0618 PM CDT Mon Sep 14 2026

Areas affected...southeast Nebraska into southwestern Iowa

Concerning...Tornado Watch 669...

Valid 142318Z - 150015Z

The severe weather threat for Tornado Watch 669 continues.

SUMMARY...Multiple severe gusts are possible over the next few
hours, especially across southeastern NE. A couple of tornadoes may
occur, mainly over southwestern IA.

DISCUSSION...Multiple linear segments have developed over the past
couple of hours, accompanied by severe gusts. These storms will
continue to progress eastward amid appreciably strong mid-level flow
atop a well-mixed boundary layer, accompanied by a severe gust
threat. At the moment, the greatest short-term severe threat exists
with storms over southeastern NE, where surface temperatures into
the 80s F to near 90 F, are promoting downward momentum mixing
potential. As these storms progress into southwestern IA, they will
traverse a baroclinic zone with somewhat cooler surface temperatures
(e.g. low 80s F), but with a more moist boundary layer given low 70s
F dewpoints. Destabilization of this boundary layer is somewhat
uncertain. However, should the southwest IA boundary layer
destabilize, backed low-level flow and accompanying enlarged
hodographs (per OAX VADs) suggest that a couple of QLCS tornadoes
may develop, with a severe gust threat also continuing.

..Squitieri/Smith.. 09/14/2026

...Please see https://urldefense.com/v3/__http://www.spc.noaa.gov__;!!DZ3fjg!_RjjjgFMd3UtyJ85KCIRth1vX_vEVOexbUz9kIvclAmDLNn5qLLf0KNT-QCFN9dw-je7G0v-SkfMRm9TAWp-NxZIUOo$ for graphic product...

ATTN...WFO...DMX...EAX...OAX...TOP...

LAT...LON 40309736 41189682 41829559 42129455 41909384 41249348
40679416 40309540 40139627 39989729 40309736

MOST PROBABLE PEAK TORNADO INTENSITY...85-110 MPH
MOST PROBABLE PEAK WIND GUST...65-80 MPH
MOST PROBABLE PEAK HAIL SIZE...1.00-1.75 IN


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