Alert archive / Arkansas / Special Weather Statements in 2021

Special Weather Statement, NWS Shreveport, LA

February 25, 2021Union County, Arkansas

NWS Shreveport, LA issued this special weather statement at Feb 25, 2021, 6:28 PM CST for Union County, Arkansas. It was in force for 47 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Feb 25, 2021, 6:28 PM CST (00:28 UTC)
Expired
Feb 25, 2021, 7:15 PM CST
In force
47 min
Issued by
NWS Shreveport, LA

County Union County, AR

The radar

The Shreveport radar (KSHV), 159 km from the middle of the area, began a volume at 00:32 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 nearest sounding before it

Shreveport, LA (KSHV), launched 00:00Z, 0.5 hours before the alert went out and 150 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, Shreveport, LA at 00:00Z on 2021-02-26Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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, Shreveport, LA at 00:00Z on 2021-02-26The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 288 square meters per square second.1939587897117Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1097 m above ground
0-6 km bulk shear
86 kt
0-1 km storm-relative helicity
288 m²/s²
0-3 km storm-relative helicity
522 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.8

Open this sounding in Storm Lab

The text

As transmitted.

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What forecasters said that day

The local office's own words before this special weather statement 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 special weather statement went out at Feb 25, 3:20 PM CST, 3 hours 8 minutes earlier.

Area forecast discussion, Feb 25, 3:20 PM CST, 3 hours 8 minutes before
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Hazardous weather outlook, Feb 25, 11:42 AM CST, 6 hours 46 minutes before
Hazardous Weather Outlook
National Weather Service Shreveport LA
1142 AM CST Thu Feb 25 2021

ARZ050-051-059>061-070>073-LAZ001>006-010>014-017>022-OKZ077-
TXZ096-097-108>112-124>126-136>138-149>153-165>167-261200-
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-
1142 AM CST Thu Feb 25 2021

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

.DAY ONE...This Afternoon and Tonight...

Showers and thunderstorms will increase late this afternoon
through tonight across Northeast Texas, Southeast Oklahoma,
Southwest Arkansas, and portions of North Louisiana, north of a
stationary front over Southeast Texas and Central Louisiana, and
ahead of an approaching upper level disturbance. Given the extent
of instability aloft, isolated strong to severe thunderstorms will
be possible over these areas, capable of producing large hail and
possibly locally gusty winds. Locally heavy rainfall will also be
possible as well where these storms move repeatedly over the same
areas, which may result in minor flooding of low lying, poor
drainage areas.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday...

Showers and thunderstorms will be ongoing Friday morning across
portions of Southern Arkansas, East Texas, and North Louisiana,
before diminishing from west to east during the day with the
departure of the upper level disturbance. An isolated strong to
severe thunderstorm can not be ruled out Friday morning over these
areas, capable of producing large hail and locally gusty winds,
before these threat diminish for the afternoon. Isolated to
scattered showers and a few thunderstorms may redevelop along and
north of the front as it drifts north into portions of Lower East
Texas and North Louisiana Friday night, before the front lifts
back north as a warm front out of the region Saturday. Additional
showers and thunderstorms will increase across the region Sunday
afternoon through Tuesday as a cold front gradually shifts back
southeast through the area. The threat for isolated strong to
severe thunderstorms and locally heavy rainfall can not be ruled
out across the region during this timeframe, before drier
conditions settle in by Wednesday.

.SPOTTER INFORMATION STATEMENT...

Activation of emergency management personnel...amateur radio
operators...and storm spotters may be needed tonight for portions
of Northeast Texas, extreme Southeast Oklahoma, Southwest
Arkansas, and extreme Northern Louisiana.

15

In the hours before

Special weather statement, Feb 25, 3:52 PM CST, 2 hours 36 minutes before
Special Weather Statement
National Weather Service Shreveport LA
352 PM CST Thu Feb 25 2021

ARZ060-070-071-TXZ097-112-252230-
Hempstead AR-Lafayette AR-Miller AR-Cass TX-Bowie TX-
352 PM CST Thu Feb 25 2021

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHEASTERN HEMPSTEAD...NORTHERN
MILLER...NORTH CENTRAL LAFAYETTE...NORTHEASTERN CASS AND SOUTHEASTERN
BOWIE COUNTIES UNTIL 430 PM CST...

At 352 PM CST, Doppler radar was tracking a strong thunderstorm near
Wake Village, moving northeast at 60 mph.

Pea size hail will be possible with this storm.

Locations impacted include...
Texarkana, Hope, Wake Village, Nash, Perrytown, Mandeville, Genoa,
Mount Pleasant, Domino, Patmos, Pleasant Hill, Hervey, Homan and
Piney Grove.

LAT...LON 3322 9414 3339 9425 3377 9348 3346 9349
TIME...MOT...LOC 2152Z 241DEG 54KT 3335 9411

15
Special weather statement, Feb 25, 4:59 PM CST, 1 hour 29 minutes before
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Special weather statement, Feb 25, 5:50 PM CST, 38 minutes before
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Special weather statement, Feb 25, 6:07 PM CST, 21 minutes before
Special Weather Statement
National Weather Service Shreveport LA
607 PM CST Thu Feb 25 2021

LAZ001-002-TXZ126-138-260045-
Bossier LA-Caddo LA-Harrison TX-Marion TX-
607 PM CST Thu Feb 25 2021

...SIGNIFICANT WEATHER ADVISORY FOR NORTHWESTERN CADDO AND
NORTHWESTERN BOSSIER PARISHES...SOUTHEASTERN MARION AND NORTHEASTERN
HARRISON COUNTIES UNTIL 645 PM CST...

At 607 PM CST, Doppler radar was tracking a strong thunderstorm near
Woodlawn, or 7 miles northeast of Marshall, moving east at 50 mph.

Penny size hail and winds in excess of 40 mph will be possible with
this storm.

Locations impacted include...
Marshall, Blanchard, Benton, Oil City, Mooringsport, Belcher,
Gilliam, Karnack, Woodlawn, Gray, Scottsville, Uncertain, Dixie,
Alden Bridge, Rocky Mount, Caddo Lake, Linton, Bellevue, Cavett and
Leigh.

LAT...LON 3247 9432 3270 9440 3293 9357 3267 9348
TIME...MOT...LOC 0007Z 252DEG 45KT 3262 9427

44
Special weather statement, Feb 25, 6:28 PM CST, 0 minutes before
Special Weather Statement
National Weather Service Shreveport LA
628 PM CST Thu Feb 25 2021

ARZ073-LAZ004-006-260115-
Union AR-Union LA-Claiborne LA-
628 PM CST Thu Feb 25 2021

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHEASTERN UNION COUNTY...
NORTHWESTERN UNION AND NORTHEASTERN CLAIBORNE PARISHES UNTIL 715 PM
CST...

At 628 PM CST, Doppler radar was tracking a strong thunderstorm 7
miles west of Bernice, or 11 miles south of Junction City, moving
northeast at 65 mph.

Half inch hail and winds in excess of 30 mph will be possible with
this storm.

Locations impacted include...
Huttig, Bernice, Strong, Cooley, Lapile, Junction City, Lisbon,
Felsenthal, Spearsville, Lillie, New London, Antioch, Aurelle,
Oakland, Taylorville, Summerfield, Corney Lake and Lockhart.

LAT...LON 3276 9277 3276 9282 3290 9293 3326 9223
      3323 9223 3323 9222 3321 9223 3320 9221
      3321 9218 3316 9217 3317 9215 3316 9211
      3312 9212 3311 9214 3307 9213 3307 9211
      3304 9211
TIME...MOT...LOC 0028Z 241DEG 55KT 3287 9278

44

The office that day

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

IssuedProductOfficeCountiesLasted
Feb 25, 6:40 PM CSTSpecial Weather StatementSHVGregg, Harrison, Marion50 min
Feb 25, 9:37 PM CSTSevere Thunderstorm WarningSHVBowie, Franklin, Red River, Titus38 min
Feb 25, 10:10 PM CSTSevere Thunderstorm WarningSHVBowie50 min
Feb 25, 10:45 PM CSTSevere Thunderstorm WarningSHVBowie, Cass45 min
Feb 25, 11:56 PM CSTSpecial Weather StatementSHVRed River34 min
Feb 26, 9:47 AM CSTRiver Flood WarningSHVFranklin, Morris, Red River, Titus5 days
Feb 26, 9:47 AM CSTRiver Flood WarningSHVFranklin, Morris, Titus6 days
Feb 26, 9:50 AM CSTRiver Flood WarningSHVCass, Marion10 days
Feb 25, 6:07 PM CSTSpecial Weather StatementSHVBossier, Caddo38 min
Feb 26, 12:30 AM CSTSpecial Weather StatementSHVLittle River30 min
Feb 26, 8:00 AM CSTRiver Flood WarningSHVAshley, Union57 days

Nearby

Special Weather Statements in Arkansas, 2021Every special weather statement in 2021

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.