Alert archive / Texas / Special Weather Statements in 2021

Special Weather Statement, NWS Shreveport, LA

May 27, 2021Red River County, Texas; Little River County, Arkansas

NWS Shreveport, LA issued this special weather statement at May 27, 2021, 11:30 PM CDT for Red River County, Texas; Little River County, Arkansas. It was in force for 45 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
May 27, 2021, 11:30 PM CDT (04:30 UTC)
Expired
May 28, 2021, 12:15 AM CDT
In force
45 min
Issued by
NWS Shreveport, LA

Counties Little River County, AR, Red River County, TX

The radar

The Shreveport radar (KSHV), 154 km from the middle of the area, began a volume at 04:32 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, 4.5 hours before the alert went out and 156 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 2021-05-28Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 686 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, Shreveport, LA at 00:00Z on 2021-05-28The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 45 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
686 J/kg
Mixed-layer CIN
-59 J/kg
Mixed-layer LCL
1424 m above ground
0-6 km bulk shear
30 kt
0-1 km storm-relative helicity
45 m²/s²
0-3 km storm-relative helicity
149 m²/s²
Significant tornado parameter
0.1
Supercell composite
1.6

Open this sounding in Storm Lab

The text

As transmitted.

759 
WWUS84 KSHV 280430
SPSSHV

Special Weather Statement
National Weather Service Shreveport LA
1130 PM CDT Thu May 27 2021
 
ARZ050-059-OKZ077-TXZ096-097-280515-
Sevier AR-Little River AR-McCurtain OK-Bowie TX-Red River TX-
1130 PM CDT Thu May 27 2021

...SIGNIFICANT WEATHER ADVISORY FOR LITTLE RIVER...SOUTHWESTERN
SEVIER...SOUTHEASTERN MCCURTAIN...NORTHERN BOWIE AND RED RIVER
COUNTIES UNTIL 1215 AM CDT...

At 1129 PM CDT, Doppler radar was tracking strong thunderstorms along
a line extending from 9 miles southeast of Broken Bow to near Idabel
to 6 miles northeast of Bagwell to 7 miles northeast of Blossom.
Movement was southeast at 35 mph.

Winds in excess of 30 mph will be possible with these storms.

Locations impacted include...
Ashdown, New Boston, Clarksville, Horatio, Foreman, Boxelder, Idabel,
De Kalb, Wilton, Winthrop, Ogden, Arkinda, Bagwell, Richmond, Dalby
Springs, Detroit, Avery, Annona, Haworth and Moon.

LAT...LON 3399 9434 3362 9392 3338 9465 3336 9480
      3340 9488 3339 9503 3366 9531 3375 9531
TIME...MOT...LOC 0429Z 312DEG 30KT 3393 9461 3383 9480 3374 9510 3371
9526

$$

20

The office that day

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

IssuedProductOfficeCountiesLasted
May 28, 12:17 AM CDTSpecial Weather StatementSHVBowie, Cass, Franklin, Morris, Titus43 min
May 28, 1:03 AM CDTSpecial Weather StatementSHVCamp, Cass, Franklin, Morris, Titus, Wood42 min
May 28, 1:46 AM CDTSpecial Weather StatementSHVGregg, Harrison, Marion, Smith, Upshur44 min
May 28, 2:34 AM CDTSevere Thunderstorm WarningSHVHarrison, Panola41 min
May 28, 3:06 AM CDTSpecial Weather StatementSHVPanola39 min
May 28, 3:22 AM CDTSpecial Weather StatementSHVNacogdoches, Shelby38 min
May 28, 4:18 AM CDTSpecial Weather StatementSHVSmith42 min
May 28, 8:16 AM CDTAreal Flood AdvisorySHVAngelina, Cherokee, Nacogdoches3 hr
May 28, 10:48 AM CDTRiver Flood WarningSHVGregg23 hr
May 28, 3:15 AM CDTSevere Thunderstorm WarningSHVBienville, Bossier, Caddo, Claiborne, De Soto, Jackson and 6 more60 min
May 28, 4:00 AM CDTSpecial Weather StatementSHVJackson, Ouachita45 min
May 28, 10:03 AM CDTRiver Flood WarningSHVBienville, Bossier, Webster21 days
May 27, 10:00 PM CDTSpecial Weather StatementSHVPolk30 min
May 27, 10:30 PM CDTSpecial Weather StatementSHVHoward, Sevier45 min
May 27, 11:24 PM CDTSpecial Weather StatementSHVHempstead51 min
May 28, 12:14 AM CDTSpecial Weather StatementSHVHempstead, Lafayette, Miller, Nevada46 min
May 28, 12:59 AM CDTSpecial Weather StatementSHVColumbia, Lafayette, Miller, Nevada46 min
May 28, 1:50 AM CDTSpecial Weather StatementSHVColumbia, Union40 min
May 27, 9:21 PM CDTSevere Thunderstorm WarningSHVMcCurtain39 min
May 27, 9:37 PM CDTSpecial Weather StatementSHVMcCurtain38 min

Nearby

Special Weather Statements in Texas, 2021Special 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.