Severe Storm Outlook Narrative (AC)
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000
ACUS11 KWNS 200233
SWOMCD
SPC MCD 200233
OKZ000-TXZ000-200430-

Mesoscale Discussion 0193
NWS Storm Prediction Center Norman OK
0833 PM CST Sun Feb 19 2017

Areas affected...Portions of central TX northward through central OK

Concerning...Severe Thunderstorm Watch 34...

Valid 200233Z - 200430Z

The severe weather threat for Severe Thunderstorm Watch 34
continues.

SUMMARY...A risk for isolated severe storms continues in
remaining-valid portions of Watch 34. While strong-storm potential
may spread east/north of Watch 34 later this evening, additional
Watch issuance will not be needed.

DISCUSSION...Clusters of convection continue increasing in coverage
along a line from west-central OK southward into western parts of
central and south TX. Deep meridional flow oriented parallel to
amalgamating outflow boundaries along the eastern flank of the
weakly organizing convection suggests an overall tendency for this
activity to become undercut. One exception in the short-term may
continue across parts of south-central/southwest Oklahoma, where
deep flow is oriented more obliquely to portions of the leading edge
of an organizing convective cluster near the Red River. Locally
damaging wind gusts may accompany this activity, along with sporadic
bowing segments occasionally ingesting surface-based inflow farther
south. Eastward propagation of this activity will continue through
late evening, though increasingly stable boundary-layer conditions
owing to nocturnal cooling will tend to lessen the severe risk with
time. The severe risk will diminish west of the aforementioned
convective line.

..Cohen.. 02/20/2017

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

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

LAT...LON   30829926 33439815 34939785 36109751 36199662 35439635
            33369660 31009789 30359896 30829926



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