Alert archive / Texas / Severe Thunderstorm Warnings in 2020

Severe Thunderstorm Warning 327, NWS Norman, OK

May 22, 2020Tillman County, Oklahoma; Wichita County, Wilbarger County, Texas

NWS Norman, OK issued this severe thunderstorm warning at May 22, 2020, 4:57 PM CDT for Tillman County, Oklahoma; Wichita County, Wilbarger County, Texas. It was in force for 33 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
May 22, 2020, 4:57 PM CDT (21:57 UTC)
Expired
May 22, 2020, 5:30 PM CDT
In force
33 min
Issued by
NWS Norman, OK
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

Counties Tillman County, OK, Wichita County, TX, Wilbarger County, TX

The radar

The Altus AFB radar (KFDR), 24 km from the middle of the area, began a volume at 22:01 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.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
May 22, 1:27 PM CDTSevere Thunderstorm WatchSPC6 hr

The nearest sounding before it

Fort Worth, TX (KFWD), launched 12:00Z, 10.0 hours before the alert went out and 213 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-pSkew-T log-p diagram, Fort Worth, TX at 12:00Z on 2020-05-22Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 580 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Fort Worth, TX at 12:00Z on 2020-05-22The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 30 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
580 J/kg
Mixed-layer CIN
-430 J/kg
Mixed-layer LCL
1997 m above ground
0-6 km bulk shear
18 kt
0-1 km storm-relative helicity
30 m²/s²
0-3 km storm-relative helicity
59 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Norman, OK wrote its last area forecast discussion before this severe thunderstorm warning went out at May 22, 2:14 PM CDT, 2 hours 43 minutes earlier.

Area forecast discussion, May 22, 2:14 PM CDT, 2 hours 43 minutes before
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Hazardous weather outlook, May 22, 11:57 AM CDT, 5 hours before
Hazardous Weather Outlook...UPDATED
National Weather Service Norman OK
1157 AM CDT Fri May 22 2020

OKZ004>048-050>052-TXZ083>090-231700-
Harper-Woods-Alfalfa-Grant-Kay-Ellis-Woodward-Major-Garfield-
Noble-Roger Mills-Dewey-Custer-Blaine-Kingfisher-Logan-Payne-
Beckham-Washita-Caddo-Canadian-Oklahoma-Lincoln-Grady-McClain-
Cleveland-Pottawatomie-Seminole-Hughes-Harmon-Greer-Kiowa-Jackson-
Tillman-Comanche-Stephens-Garvin-Murray-Pontotoc-Coal-Cotton-
Jefferson-Carter-Johnston-Atoka-Love-Marshall-Bryan-Hardeman-
Foard-Wilbarger-Wichita-Knox-Baylor-Archer-Clay-
1157 AM CDT Fri May 22 2020

This hazardous weather outlook is for portions of northern...
western...central...and southern Oklahoma...and western north
Texas.

.DAY ONE...This Afternoon through Tonight...

.Thunderstorms...
Thunderstorms are likely to develop near a remnant outflow
boundary across western-north Texas later this afternoon, most
likely not until around 3pm. Hail up to two inches in diameter
and wind gusts up to 70 mph will be possible with these storms.
The most likely locations to be impacted are south of a line from
Altus to Waurika.

A cluster of storms may evolve this evening and move eastward
across southern Oklahoma with a continued threat of severe
weather. This evening, the primary threat will transition to
damaging winds, although large hail may still be possible with the
strongest storms. A tornado or two is possible, especially near
and south of the Red River during the early to mid evening.
Individual storm motion will be east-northeasterly at 15 to 25
mph. The severe weather threat should diminish early tonight as
storms weaken and move southeast of the area.

.SPOTTER AND EMERGENCY MANAGEMENT STATEMENT...
Storm spotter groups and emergency management personnel across
the risk areas should prepare for severe weather operations late
this afternoon and tonight.

.Heavy Rainfall...
Heavy rainfall will be possible this morning across parts of
southeastern Oklahoma. Additional heavy rainfall will be possible
late this afternoon and tonight across southern Oklahoma and
western north Texas.

.DAYS TWO THROUGH SEVEN...Saturday through Thursday...

.Thunderstorms...
Thunderstorms are expected to continue off and on through next
Thursday. A Marginal Risk covers the area west of Alva to Hobart
to Archer City Texas on Saturday, mainly during the evening.
Severe thunderstorms will also be possible on Sunday, but details
are still uncertain regarding timing and location.

.Heavy rain...
Heavy rainfall is possible, particularly on Friday, and again
Sunday night into Monday. Heavy rainfall may lead to flooding.

Get graphics and more details at weather.gov/norman...and follow
our weather forecast office on Twitter and Facebook.

In the hours before

Special weather statement, May 22, 4:47 PM CDT, 10 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE Norman OK
447 PM CDT Fri May 22 2020

OKZ037-TXZ085-086-222200-
Tillman OK-Wichita TX-Wilbarger TX-
447 PM CDT Fri May 22 2020

...SIGNIFICANT WEATHER ADVISORY FOR southern Tillman...northwestern
Wichita and east central Wilbarger Counties Until 500 PM CDT...

AT 444 PM CDT, a strong thunderstorm was located near Davidson,
moving northeast at 35 MPH.

HAZARDS INCLUDE...
Hail up to the size of nickels...
Wind gusts to 50 MPH...

Locations impacted include...
Davidson, Hollister and Loveland.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Monitor the weather situation closely and be alert for threatening
weather conditions.

&&

LAT...LON 3425 9918 3451 9878 3435 9866 3434 9866
      3433 9865 3428 9861 3410 9907
TIME...MOT...LOC 2144Z 238DEG 30KT 3422 9905

BRB

The office that day

Everything else NWS Norman, OK issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 22, 1:19 AM CDTSpecial Weather StatementOUNAlfalfa, Harper, Woods, Woodward26 min
May 22, 1:49 AM CDTSpecial Weather StatementOUNAlfalfa, Woods, Woodward41 min
May 22, 1:51 AM CDTSevere Thunderstorm WarningOUNHarper, Woods, Woodward39 min
May 22, 2:12 AM CDTSevere Thunderstorm WarningOUNMajor, Woods18 min
May 22, 2:30 AM CDTSpecial Weather StatementOUNWoods30 min
May 22, 2:35 AM CDTSpecial Weather StatementOUNEllis, Grant, Major, Woodward25 min
May 22, 2:44 AM CDTSpecial Weather StatementOUNWoods31 min
May 22, 3:02 AM CDTSpecial Weather StatementOUNBlaine, Dewey, Ellis28 min
May 22, 3:03 AM CDTSpecial Weather StatementOUNGrant, Major27 min
May 22, 3:06 AM CDTSevere Thunderstorm WarningOUNAlfalfa, Garfield, Grant, Major39 min
May 22, 3:19 AM CDTSevere Thunderstorm WarningOUNAlfalfa, Garfield, Grant41 min
May 22, 3:40 AM CDTSevere Thunderstorm WarningOUNGarfield, Kingfisher, Logan, Major, Noble50 min
May 22, 4:08 AM CDTSpecial Weather StatementOUNBlaine37 min
May 22, 4:20 AM CDTSpecial Weather StatementOUNBlaine25 min
May 22, 4:24 AM CDTSevere Thunderstorm WarningOUNCanadian, Garfield, Grant, Kay, Kingfisher, Lincoln and 4 more51 min
May 22, 4:40 AM CDTSpecial Weather StatementOUNStephens35 min
May 22, 5:04 AM CDTSpecial Weather StatementOUNStephens26 min
May 22, 5:07 AM CDTSevere Thunderstorm WarningOUNCleveland, Lincoln, Logan, Noble, Oklahoma, Payne and 2 more38 min
May 22, 5:13 AM CDTSevere Thunderstorm WarningOUNCarter, Jefferson, Stephens47 min
May 22, 5:20 AM CDTSpecial Weather StatementOUNMcClain25 min
May 22, 5:39 AM CDTSevere Thunderstorm WarningOUNCleveland, Lincoln, Oklahoma, Payne, Pottawatomie, Seminole51 min
May 22, 5:53 AM CDTSevere Thunderstorm WarningOUNCarter, Garvin, Grady, McClain, Murray, Stephens52 min
May 22, 6:22 AM CDTSevere Thunderstorm WarningOUNCleveland, McClain, Pottawatomie35 min
May 22, 6:24 AM CDTSevere Thunderstorm WarningOUNHughes, Lincoln, Pottawatomie, Seminole51 min
May 22, 6:41 AM CDTSevere Thunderstorm WarningOUNGarvin, McClain, Murray, Pontotoc, Pottawatomie, Seminole49 min
May 22, 6:56 AM CDTSpecial Weather StatementOUNCarter34 min
May 22, 7:30 AM CDTSpecial Weather StatementOUNCarter, Murray30 min
May 22, 7:59 AM CDTSpecial Weather StatementOUNCarter, Murray31 min
May 22, 4:47 PM CDTSpecial Weather StatementOUNTillman13 min
May 22, 5:28 PM CDTSevere Thunderstorm WarningOUNCotton, Tillman47 min
May 22, 5:47 PM CDTSevere Thunderstorm WarningOUNComanche28 min
May 22, 6:03 PM CDTSevere Thunderstorm WarningOUNCotton, Tillman57 min
May 22, 6:12 PM CDTTornado WarningOUNTillman33 min
May 22, 6:18 PM CDTSpecial Weather StatementOUNComanche27 min
May 22, 6:20 PM CDTSevere Thunderstorm WarningOUNComanche25 min
May 22, 6:22 PM CDTSevere Thunderstorm WarningOUNCotton, Tillman53 min
May 22, 6:39 PM CDTSpecial Weather StatementOUNCaddo36 min
May 22, 6:50 PM CDTSevere Thunderstorm WarningOUNCotton, Tillman40 min
May 22, 6:57 PM CDTSevere Thunderstorm WarningOUNCotton48 min
May 21, 8:01 PM CDTSevere Thunderstorm WarningOUNBaylor, Knox44 min
May 21, 8:33 PM CDTSpecial Weather StatementOUNBaylor12 min
May 21, 8:40 PM CDTSevere Thunderstorm WarningOUNBaylor, Knox, Wilbarger50 min
May 21, 9:26 PM CDTSevere Thunderstorm WarningOUNArcher, Baylor, Wichita, Wilbarger17 min
May 22, 6:41 PM CDTSpecial Weather StatementOUNClay34 min
May 22, 6:53 PM CDTSevere Thunderstorm WarningOUNClay52 min

Nearby

Severe Thunderstorm Warnings in Texas, 2020Severe Thunderstorm Warnings in Oklahoma, 2020Every severe thunderstorm warning in 2020

Sources

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.