Severe Storm Outlook Narrative (AC)
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868
ACUS11 KWNS 262315
SWOMCD
SPC MCD 262314
KSZ000-NEZ000-COZ000-WYZ000-270115-

Mesoscale Discussion 0848
NWS Storm Prediction Center Norman OK
0614 PM CDT Fri May 26 2017

Areas affected...South-central/southeast Wyoming...southwest
Nebraska Panhandle...eastern Colorado

Concerning...Severe Thunderstorm Watch 268...

Valid 262314Z - 270115Z

The severe weather threat for Severe Thunderstorm Watch 268
continues.

SUMMARY...Scattered severe thunderstorms producing large hail,
damaging winds, and possibly a tornado will continue into the early
evening with a tendency for storms to increase somewhat in coverage
with time.  A downstream watch will likely be needed to the east of
the watch by 00Z.

DISCUSSION...Widely scattered severe thunderstorms were in progress
at 23Z/1700 MDT across the watch area from the southwest Nebraska
Panhandle south across eastern Colorado.  The severe threat will
continue through the early evening given 40-50 kts of effective
shear and around 1000-locally 2000 j/kg of MLCAPE and steep
mid-level lapse rates. Some strengthening of the surface winds have
occurred across eastern Colorado over the past couple of hours, and
thus some tornado threat will exist with favorable low-level shear.
As the low-level jet intensifies to 40-45 kts this evening, storms
should tend to develop into one or two clusters with a continued
severe wind and hail risk.  Given current motion, storms should
approach the eastern edge of WW 268 prior to 00Z and a new severe
thunderstorm watch will likely be needed by 00Z across western
Kansas and southwest Nebraska.

..Bunting/Guyer.. 05/26/2017

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

ATTN...WFO...LBF...DDC...GLD...PUB...BOU...CYS...

LAT...LON   40760492 41640399 41800296 41650169 40930121 39900059
            38040050 37280082 37060171 37120239 37370350 38040432
            39050487 40760492




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