Mesoscale Discussion 757

Issued

May 26, 2021, 7:32 PM CDT (00:32 UTC)

Expired

May 26, 2021, 9:00 PM CDT

In force

88 min

Issued by

the Storm Prediction Center

Concerning

Tornado watch 210...211

The Amarillo radar (KAMA), 76 km from the middle of the area, began a volume at 00:31 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.

642 
ACUS11 KWNS 270032
SWOMCD
SPC MCD 270032 
KSZ000-OKZ000-TXZ000-270200-

Mesoscale Discussion 0757
NWS Storm Prediction Center Norman OK
0732 PM CDT Wed May 26 2021

Areas affected...Parts of the Texas/Oklahoma Panhandles and adjacent
portions of southwestern Kansas/northwestern Oklahoma

Concerning...Tornado Watch 210...211...

Valid 270032Z - 270200Z

The severe weather threat for Tornado Watch 210, 211 continues.

SUMMARY...Scattered severe storm development, including supercells,
probably will continue into at least the 9-11 PM CDT time frame.

DISCUSSION...Intense thunderstorm development along the dryline has
become most numerous roughly west-northwest of Lubbock, TX into the
Oklahoma Panhandle, southeast of Liberal, KS.  This probably has
been the result of somewhat stronger heating to overcome
lower/mid-level inhibition, in addition to lift supported by weak
mid-level troughing overspreading the high plains. 

Although inhibition may be in the process of increasing one again,
as diurnal boundary-layer cooling commences, mixed-layer CAPE
remains strong, in the presence of strong deep-layer shear aided by
pronounced veering of lower/mid tropospheric wind fields with
height.  Coupled with southerly low-level jet strengthening to 40+
kt, supercell storm development probably will continue into late
evening, with some upscale growth possible.

While deep-layer shear is strong, southwesterly ambient deep-layer
mean flow is still a rather modest 20-30 kt across much of the
region, so eastward progression of storms likely will remain
relatively slow.

..Kerr.. 05/27/2021

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

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

LAT...LON   33930216 35430180 37749973 37559885 35549985 34220075
            33840166 33930216

Mesoscale Discussions in Texas, 2021Mesoscale Discussions in Kansas, 2021Mesoscale Discussions in Oklahoma, 2021Every mesoscale discussion in 2021

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.