Severe Storm Outlook Narrative (AC)
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984
ACUS11 KWNS 200043
SWOMCD
SPC MCD 200043
OKZ000-TXZ000-200245-

Mesoscale Discussion 0191
NWS Storm Prediction Center Norman OK
0643 PM CST Sun Feb 19 2017

Areas affected...Portions of western and central TX and southern OK

Concerning...Severe Thunderstorm Watch 34...

Valid 200043Z - 200245Z

The severe weather threat for Severe Thunderstorm Watch 34
continues.

SUMMARY...Isolated severe storms will continue spreading northward
and eastward across Watch 34 through the evening hours.

DISCUSSION...Convection continues increasing in coverage along a
boundary oriented north-northeast/south-southwest across western
portions of Watch 34. During the next few hours, isolated instances
of severe hail and wind may accompany the most vigorous updrafts --
especially those maintaining more discrete/semi-discrete
characteristics across the Edwards Plateau. With the 00Z sounding at
Fort Worth and regional VAD wind profiles indicating an appreciable
boundary-parallel flow component through much of the troposphere,
upscale convective growth will continue through the evening. As this
occurs, convection will gradually develop eastward, aided by cell
propagation into the moderately unstable environment indicated by
the aforementioned sounding. The primary hazard should transition
toward isolated damaging wind gusts, and the severe risk is expected
to diminish west of the consolidating convective line.

..Cohen.. 02/20/2017

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

ATTN...WFO...FWD...OUN...EWX...SJT...

LAT...LON   30269889 30270090 34639921 34629709 30269889




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