Subj : MESO: Mesoscale Discussion 1490
To   : wx-storm@lists.illinois.edu
From : COD Weather Processor
Date : Mon Jul 10 2023 22:59:36

ACUS11 KWNS 102259
SWOMCD
SPC MCD 102259=20
IAZ000-MNZ000-NEZ000-SDZ000-110000-

Mesoscale Discussion 1490
NWS Storm Prediction Center Norman OK
0559 PM CDT Mon Jul 10 2023

Areas affected...Central Nebraska into eastern Iowa

Concerning...Severe Thunderstorm Watch 469...

Valid 102259Z - 110000Z

The severe weather threat for Severe Thunderstorm Watch 469
continues.

SUMMARY...Severe threat continues across WW469.

DISCUSSION...Storms continue to develop across portions of central
and northeastern Nebraska into northwestern Iowa. Storm mode has
favored semi-discrete and clustered cells with reports of large hail
reported up to 2 inch and gusty winds up to 60 mph. Surface
objective analysis indicates around MLCAPE around 2000-2500 J/kg
along with deep layer shear around 40-50 knots near and ahead of the
ongoing convection. Storm mode will likely remain semi-discrete with
attempts at upscale growth along congealing outflows. Given steep
mid-level lapse rates and deep layer shear, large hail and damaging
winds will continue to be the main threats. With upscale growth, the
threat will likely transition to damaging winds through the evening.

...Thornton/Guyer.. 07/10/2023

....Please see https://urldefense.com/v3/__http://www.spc.noaa.gov__;!!DZ3fj=
g!9DbIJ_qzkmLZ_YsMXhE_Mc8HcF13cxr5iHSq8SKnYtkCbczvUwP6aaY-U2qU716bVIG959NYL=
7Ieq8kJVIuAr1J9EAw$  for graphic product...

ATTN...WFO...DMX...FSD...OAX...GID...LBF...

LAT...LON   41110132 41420131 41540133 41790118 42140024 42279968
            42409887 42559827 42779760 42889737 43049700 43309630
            43459592 43529569 43549552 43569539 43569514 43409480
            43049472 42899477 42689492 42399525 42019600 41659690
            41359763 41089848 40849913 40660011 40680068 40750095
            41110132=20


=3D =3D =3D
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