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ACUS11 KWNS 290008
SWOMCD
SPC MCD 290008
NEZ000-COZ000-WYZ000-290145-

Mesoscale Discussion 0560
NWS Storm Prediction Center Norman OK
0708 PM CDT Mon May 28 2018

Areas affected...East-central Colorado...southeast Wyoming into the
Nebraska Panhandle

Concerning...Severe Thunderstorm Watch 128...

Valid 290008Z - 290145Z

The severe weather threat for Severe Thunderstorm Watch 128
continues.

SUMMARY...Bouts of severe hail/wind remain the most common risk
within WW 128 across east-central/northeast Colorado into far
southeast Wyoming and the western Nebraska Panhandle, with a brief
tornado potential in the short term mainly from the WY/CO/NE border
vicinity to near I-76.

DISCUSSION...Multiple northeastward-moving storms including a couple
of semi-discrete supercells continue to spread toward northeast
Colorado, although trends are for an increased clustering of storms
across northeast Colorado/southeast Wyoming. While a brief tornado
potential may continue from the WY/CO/NE border vicinity to near
I-76 in the short term, the increasingly clustered storm mode and a
continued influx of outflow-related air from the east will gradually
curb the tornado potential and larger hail magnitudes, while
sporadic and more marginal hail/wind potential continues elsewhere.

It seems likely that severe storm potential will continue to
diminish near the front range vicinity/east-central Colorado owing
to boundary layer stabilization and increased subsidence in the wake
of a northeastward-shifting shortwave trough as per water vapor
imagery.

To the east/northeast of WW 128, current thinking is that an
additional watch will probably not be needed for additional portions
of western Nebraska given the influences of prior outflow.

..Guyer.. 05/29/2018

...Please see www.spc.noaa.gov for graphic product...

ATTN...WFO...LBF...PUB...BOU...CYS...

LAT...LON 38490239 38330310 38310394 39400450 40920440 41820501
42980465 42070309 41150237 40520267 40450337 40100371
39370382 38570396 38490239



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