Mesoscale Discussion 942

Issued

Jun 13, 2021, 12:53 AM CDT (05:53 UTC)

Expired

Jun 13, 2021, 2:30 AM CDT

In force

97 min

Issued by

the Storm Prediction Center

Concerning

Severe thunderstorm watch 263

The Amarillo radar (KAMA), 77 km from the middle of the area, began a volume at 05:53 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

480 
ACUS11 KWNS 130553
SWOMCD
SPC MCD 130553 
OKZ000-TXZ000-130730-

Mesoscale Discussion 0942
NWS Storm Prediction Center Norman OK
1253 AM CDT Sun Jun 13 2021

Areas affected...portions of the TX Panhandle into far western OK

Concerning...Severe Thunderstorm Watch 263...

Valid 130553Z - 130730Z

The severe weather threat for Severe Thunderstorm Watch 263
continues.

SUMMARY...Damaging wind gust potential will continue across portions
of the Texas Panhandle for several more hours and may approach far
western OK after 10z.

DISCUSSION...An organized bow is tracking southeast across the TX
Panhandle at around 40-50 mph. A few 50+ kt wind gusts have occurred
with this activity over the past hour or so. On its current track,
storms will likely move near/outside the eastern edge of WW 263 by
08z. While some boundary layer inhibition exists due to nocturnal
cooling, and warm 700 mb temperatures are noted in evening
soundings, it is likely that this activity will continue to pose
some severe wind risk across much of the TX Panhandle the next
several hours. A reservoir of strong instability exists downstream
of the bow, with very steep 2-6 km lapse rates and modest effective
shear magnitudes in place. Recent radar imagery indicates a
developing rear inflow jet, which should help to maintain intensity
and organization amid a well-developed cold pool. Additionally, an
outflow boundary associated with a cluster of storms further to the
south is surging northeastward and merging with the bow. Given the
thermodynamic environment, these merging boundaries should act to
maintain vigorous updrafts and/or support renewed development along
the surging bow. Local watch extensions and/or a new downstream
watch likely will be needed.

..Leitman/Thompson.. 06/13/2021

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

ATTN...WFO...OUN...LUB...AMA...

LAT...LON   36550191 36770147 36780071 36600016 36309976 34939969
            34449977 34290012 34290074 34430144 34690189 35770228
            36260211 36550191

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The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.