Subj : MESO: Mesoscale Discussion 0887
To   : wx-storm@lists.illinois.edu
From : COD Weather Processor
Date : Sat May 27 2023 22:49:29

ACUS11 KWNS 272249
SWOMCD
SPC MCD 272248=20
SDZ000-NEZ000-COZ000-NDZ000-MTZ000-WYZ000-280015-

Mesoscale Discussion 0887
NWS Storm Prediction Center Norman OK
0548 PM CDT Sat May 27 2023

Areas affected...Parts of central/northern High Plains

Concerning...Severe Thunderstorm Watch 245...

Valid 272248Z - 280015Z

The severe weather threat for Severe Thunderstorm Watch 245
continues.

SUMMARY...Convection continues within the central/northern High
Plains. Damaging winds and large hail are the main hazards. A
locally more favorable zone for a brief tornado will exist in
southeast Wyoming, adjacent northeast Colorado, and the Nebraska
Panhandle.

DISCUSSION...Scattered convection within the High Plains surface
trough continues to the east. Eastward progression has generally
been slow on account of upper-level winds being largely parallel to
the trough. This is particularly the case for east-central Nebraska
into Western South Dakota and adjacent Montana. Given all the
storm/cold-pool interactions, damaging winds will likely be the
primary threat. However, initial updraft pulses would pose some
threat for large hail.

For parts of northeast Colorado, southeast Wyoming, and the Nebraska
Panhandle, deep-layer shear is more perpendicular to the boundary
and surface winds are backed to southeasterly. This setup will allow
more broken line mode. Recent satellite/radar imagery also shows
development of isolated storms near the WY/NE border. Damaging winds
and large hail will remain a risk in these areas. Additionally, the
local environment will be modestly more favorable for a brief
tornado.

...Wendt.. 05/27/2023

....Please see https://urldefense.com/v3/__http://www.spc.noaa.gov__;!!DZ3fj=
g!8RTQaVZZEVCakT9RfnIqIiZrnZksGuL9Bchu6C1zMNGEyobnP_ZD92nOBzFsWHQ3rj-rjy50f=
JEvkqPN56TvLp5ieNg$  for graphic product...

ATTN...WFO...BIS...UNR...BOU...CYS...BYZ...

LAT...LON   40090456 41050509 43370508 44830495 45830487 46200419
            46190380 46040346 42600296 40760326 40090378 40010422
            40090456=20


=3D =3D =3D
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