Alert archive / Arkansas / Severe Thunderstorm Warnings in 2022

Severe Thunderstorm Warning 154, NWS Shreveport, LA

May 21, 2022Cass County, Harrison County, Marion County, Texas; 4 parishes in Louisiana; 5 counties in Arkansas

NWS Shreveport, LA issued this severe thunderstorm warning at May 21, 2022, 11:59 PM CDT for Cass County, Harrison County, Marion County, Texas; 4 parishes in Louisiana; 5 counties in Arkansas. It was in force for 61 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 21, 2022, 11:59 PM CDT (04:59 UTC)
Expired
May 22, 2022, 1:00 AM CDT
In force
61 min
Issued by
NWS Shreveport, LA
Area
Storm-based polygon
Hail
0.75 in
Wind
60.0 mph

Counties Columbia County, AR, Lafayette County, AR, Miller County, AR, Nevada County, AR, Union County, AR, Bossier Parish, LA, Caddo Parish, LA, Claiborne Parish, LA, Webster Parish, LA, Cass County, TX, Harrison County, TX, Marion County, TX

The radar

The Shreveport radar (KSHV), 63 km from the middle of the area, began a volume at 05:02 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 21, 3:30 PM CDTSevere Thunderstorm WatchSPC10 hr

The nearest sounding before it

Lake Charles Mun, LA (KLCH), launched 00:00Z, 5.0 hours before the alert went out and 321 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, Lake Charles Mun, LA at 00:00Z on 2022-05-22Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 3849 joules per kilogram.LCLEL10008507005003002001001 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, Lake Charles Mun, LA at 00:00Z on 2022-05-22The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -60 square meters per square second.1939Sfc1 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
3849 J/kg
Mixed-layer CIN
-3 J/kg
Mixed-layer LCL
815 m above ground
0-6 km bulk shear
17 kt
0-1 km storm-relative helicity
-60 m²/s²
0-3 km storm-relative helicity
-13 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 Shreveport, LA wrote its last area forecast discussion before this severe thunderstorm warning went out at May 21, 9:48 PM CDT, 2 hours 11 minutes earlier.

Area forecast discussion, May 21, 9:48 PM CDT, 2 hours 11 minutes before
Area Forecast Discussion
National Weather Service Shreveport LA
948 PM CDT Sat May 21 2022

.UPDATE...

Afternoon forecast package looks to be on track, not necessitating
any significant updates this evening. The frontal driven
convection extending from deep east Texas into southwest Arkansas
continues to develop as it propagates eastward, with some isolated
pre frontal convection reaching severe criteria as well.
Meanwhile, an outflow dominant QLCS is pushing eastward into deep
east Texas, where it will interact with a very unstable airmass
characterized by CAPE values exceeding 4000 J/kg and steep lapse
rates. Severe Thunderstorm Watch 258 remains in effect until 1:00
AM CDT.

/26/

&&

.PREV DISCUSSION... /issued 616 PM CDT Sat May 21 2022/

AVIATION...

For the 22/00Z TAFs, conditions will deteriorate through the
evening hours as thunderstorms enter area airspace from the north
and west. Some of these storms may become severe before 22/04Z,
with impacts concentrated at first from KTYR to KTXK. Other
terminals should anticipate impacts of strong to potentially
severe storms overnight and into the morning as the line gradually
pushes east. Thus, carrying widespread SHRA and TSRA, as well as
MVFR/IFR ceilings, possibly as low as LIFR. Visibilities will
likewise deteriorate in locally heavy rainfall. Will amend with
TEMPO groups as needed as shower/storm activity progresses.

/26/

&&

.PRELIMINARY POINT TEMPS/POPS...
SHV  68  78  63  82 /  90  60  20  30
MLU  69  80  64  81 /  70  90  30  30
DEQ  59  70  58  77 /  80  30  10  30
TXK  64  70  60  79 /  90  40  10  20
ELD  63  72  58  78 /  80  70  20  20
TYR  61  74  63  81 /  90  40  10  40
GGG  63  75  63  82 /  90  50  20  30
LFK  68  83  66  84 /  80  50  20  40

&&

.SHV WATCHES/WARNINGS/ADVISORIES...
AR...None.
LA...None.
OK...None.
TX...None.
&&

26/15
Hazardous weather outlook, May 21, 6:12 AM CDT, 17 hours 47 minutes before
Hazardous Weather Outlook
National Weather Service Shreveport LA
612 AM CDT Sat May 21 2022

ARZ050-051-059>061-070>073-LAZ001>006-010>014-017>022-OKZ077-TXZ096-
097-108>112-124>126-136>138-149>153-165>167-221115-
Sevier-Howard-Little River-Hempstead-Nevada-Miller-Lafayette-
Columbia-Union-Caddo-Bossier-Webster-Claiborne-Lincoln-De Soto-
Red River-Bienville-Jackson-Ouachita-Sabine-Natchitoches-Winn-Grant-
Caldwell-La Salle-McCurtain-Bowie-Franklin-Titus-Camp-Morris-Cass-
Wood-Upshur-Marion-Smith-Gregg-Harrison-Cherokee-Rusk-Panola-
Nacogdoches-Shelby-Angelina-San Augustine-
612 AM CDT Sat May 21 2022

This Hazardous Weather Outlook is for south central Arkansas,
southwest Arkansas, north central Louisiana, northwest Louisiana,
southeast Oklahoma, east Texas and northeast Texas.

.DAY ONE...Today and tonight.

Scattered to numerous thunderstorms are expected by late afternoon
into the evening and overnight hours as a strong cold front shifts
into the region. Some storms may be strong to severe with damaging
winds and hail possible, along with a non-zero tornado threat that
cannot be completely ruled out.

.DAYS TWO THROUGH SEVEN...Sunday through Friday.

Additional thunderstorms will be possible through the remainder of
the weekend into much of next week as the cold front will stall near
the coast and lift back northward Monday as a warm front. Meanwhile,
multiple upper level disturbances will transition across the region
through mid week and bring locally heavy rainfall with some storms.
These periods of heavy rainfall may present some possible flooding
concerns through the middle of next week with total event rainfall
amounts generally expected to range between 3-6 inches along with
isolated totals possible.

.SPOTTER INFORMATION STATEMENT...

Activation of emergency management personnel, amateur radio
operators, and storm spotters may be needed today and tonight.

19

In the hours before

Local storm report, May 21, 10:48 PM CDT, 1 hour 11 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SHREVEPORT LA
1048 PM CDT SAT MAY 21 2022

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1037 PM     TSTM WND DMG     6 SSE ARP               32.14N 95.01W
05/21/2022                   SMITH              TX   EMERGENCY MNGR

            TREES AND POWER LINES DOWN.

&&

AS
Local storm report, May 21, 10:52 PM CDT, 1 hour 7 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SHREVEPORT LA
1052 PM CDT SAT MAY 21 2022

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1025 PM     TSTM WND DMG     TYLER                   32.33N 95.31W
05/21/2022                   SMITH              TX   PUBLIC

            TWO TREES DOWN NEAR BROADWAY AVENUE. TREE
            DOWN NEAR UT CAMPUS.

&&

AS
Local storm report, May 21, 11:10 PM CDT, 49 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SHREVEPORT LA
1110 PM CDT SAT MAY 21 2022

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1104 PM     TSTM WND DMG     3 S LAKEPORT            32.35N 94.71W
05/21/2022                   RUSK               TX   EMERGENCY MNGR

            A TREE WAS DOWNED BLOCKING FM 2011 NEAR CR
            2124D NEAR LAKE CHEROKEE.

&&

15
Special weather statement, May 21, 11:15 PM CDT, 44 minutes before
Special Weather Statement
National Weather Service Shreveport LA
1115 PM CDT Sat May 21 2022

TXZ152-165-166-220515-
Angelina TX-Nacogdoches TX-San Augustine TX-
1115 PM CDT Sat May 21 2022

...Strong thunderstorms will impact portions of southern Nacogdoches,
Angelina and San Augustine Counties through 1215 AM CDT...

At 1114 PM CDT, Doppler radar was tracking strong thunderstorms along
a line extending from 8 miles west of Woden to near Diboll to near
Groveton. Movement was east at 50 mph.

HAZARD...Winds in excess of 40 mph.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects.

Locations impacted include...
Lufkin, Diboll, Hudson, Huntington, San Augustine, Woden, Pollok,
Macune, Etoile, Burke, Zavalla, Chireno, Broaddus, Denning, Shawnee,
Clawson, Central, Redland, Homer and Dolan.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

A Severe Thunderstorm Watch remains in effect until 100 AM CDT for
eastern and northeastern Texas.

&&

LAT...LON 3110 9465 3111 9476 3115 9485 3123 9486
      3126 9490 3128 9488 3132 9490 3134 9496
      3138 9495 3143 9500 3153 9487 3153 9443
      3152 9398 3146 9399 3141 9404 3136 9402
      3134 9404 3111 9405 3103 9447
TIME...MOT...LOC 0414Z 264DEG 43KT 3147 9467 3122 9478 3100 9517

MAX HAIL SIZE...0.00 IN
MAX WIND GUST...40 MPH

15
Local storm report, May 21, 11:16 PM CDT, 43 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SHREVEPORT LA
1116 PM CDT SAT MAY 21 2022

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1037 PM     TSTM WND DMG     9 WSW HENDERSON         32.09N 94.93W
05/21/2022                   RUSK               TX   EMERGENCY MNGR

            *** 1 INJ ***
            VEHICLE COLLISION WITH A TREE AT THE
            INTERSECTION OF SH 42 AND CR 468 IN W RUSK
            COUNTY. 1 MINOR INJURY REPORTED.

&&

SP
Special weather statement, May 21, 11:40 PM CDT, 19 minutes before
Special Weather Statement
National Weather Service Shreveport LA
1140 PM CDT Sat May 21 2022

LAZ001-002-010-011-017-TXZ138-151-153-166-167-220530-
De Soto LA-Bossier LA-Red River LA-Caddo LA-Sabine LA-Sabine TX-
Panola TX-Harrison TX-San Augustine TX-Shelby TX-
1140 PM CDT Sat May 21 2022

...Strong thunderstorms will impact portions of De Soto, northwestern
Red River, southern Caddo, southern Bossier and Sabine Parishes,
southeastern Harrison, eastern Panola, Shelby, eastern San Augustine
and Sabine Counties through 1230 AM CDT...

At 1140 PM CDT, Doppler radar was tracking strong thunderstorms
along a line extending from 7 miles east of Marshall to 9 miles
northeast of Tenaha to near Joaquin to San Augustine. Movement was
east at 50 mph.

HAZARD...Winds in excess of 40 mph.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects.

Locations impacted include...
Shreveport, Bossier City, Center, Mansfield, Milam, Haughton,
Greenwood, Blanchard, Many, Waskom, San Augustine, Stonewall, Zwolle,
Logansport, Hemphill, Pineland, Joaquin, Converse, Deberry and
Elysian Fields.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

A Severe Thunderstorm Watch remains in effect until 100 AM CDT for
northwestern Louisiana...and eastern and northeastern Texas.

&&

LAT...LON 3112 9415 3188 9421 3205 9420 3259 9428
      3267 9346 3209 9342 3191 9345 3130 9343
      3128 9344 3128 9353 3124 9356 3123 9354
      3120 9355 3117 9358 3118 9363 3116 9391
      3114 9404 3111 9406 3110 9413
TIME...MOT...LOC 0439Z 267DEG 43KT 3251 9423 3206 9416 3189 9408 3153
9411

MAX HAIL SIZE...0.00 IN
MAX WIND GUST...40 MPH

15

The office that day

Everything else NWS Shreveport, LA issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 21, 9:18 PM CDTSpecial Weather StatementSHVGregg27 min
May 21, 9:27 PM CDTSevere Thunderstorm WarningSHVGregg, Rusk63 min
May 21, 9:43 PM CDTSevere Thunderstorm WarningSHVCherokee, Nacogdoches, Rusk, Smith62 min
May 21, 10:23 PM CDTSevere Thunderstorm WarningSHVBowie, Cass52 min
May 21, 10:38 PM CDTSevere Thunderstorm WarningSHVCherokee, Gregg, Harrison, Nacogdoches, Panola, Rusk and 4 more67 min
May 21, 10:55 PM CDTSevere Thunderstorm Warning Considerable damage threatSHVCass, Marion65 min
May 21, 11:15 PM CDTSpecial Weather StatementSHVAngelina, San Augustine60 min
May 21, 11:31 PM CDTSevere Thunderstorm WarningSHVHarrison, Marion44 min
May 21, 11:40 PM CDTSpecial Weather StatementSHVSabine, San Augustine, Shelby50 min
May 22, 12:25 AM CDTSpecial Weather StatementSHVSabine, San Augustine65 min
May 22, 12:59 AM CDTSpecial Weather StatementSHVBossier, Claiborne, Webster61 min
May 22, 1:18 AM CDTSpecial Weather StatementSHVBienville, Natchitoches57 min
May 22, 3:20 AM CDTSpecial Weather StatementSHVCaldwell40 min
May 21, 7:58 PM CDTSevere Thunderstorm WarningSHVHoward, Sevier62 min
May 21, 8:58 PM CDTSevere Thunderstorm WarningSHVHempstead, Howard, Little River, Sevier62 min
May 21, 9:59 PM CDTSevere Thunderstorm WarningSHVHempstead, Howard, Little River, Nevada61 min

Nearby

Severe Thunderstorm Warnings in Arkansas, 2022Severe Thunderstorm Warnings in Louisiana, 2022Severe Thunderstorm Warnings in Texas, 2022Every severe thunderstorm warning in 2022

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.