Alert archive / Arkansas / Severe Thunderstorm Warnings in 2020

Severe Thunderstorm Warning 211, NWS Shreveport, LA

May 27, 2020Union County, Arkansas

NWS Shreveport, LA issued this severe thunderstorm warning at May 27, 2020, 12:43 AM CDT for Union County, Arkansas. It was in force for 27 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 27, 2020, 12:43 AM CDT (05:43 UTC)
Expired
May 27, 2020, 1:10 AM CDT
In force
27 min
Issued by
NWS Shreveport, LA
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

County Union County, AR

The radar

The Shreveport radar (KSHV), 141 km from the middle of the area, began a volume at 05:43 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, 5.7 hours before the alert went out and 132 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 2020-05-27Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 924 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 2020-05-27The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -16 square meters per square second.1939587897Sfc1 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
924 J/kg
Mixed-layer CIN
-6 J/kg
Mixed-layer LCL
1079 m above ground
0-6 km bulk shear
29 kt
0-1 km storm-relative helicity
-16 m²/s²
0-3 km storm-relative helicity
-23 m²/s²
Significant tornado parameter
-0.1
Supercell composite
-0.8

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 26, 9:46 PM CDT, 2 hours 57 minutes earlier.

Area forecast discussion, May 26, 9:46 PM CDT, 2 hours 57 minutes before
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Hazardous weather outlook, May 26, 8:01 PM CDT, 4 hours 42 minutes before
Hazardous Weather Outlook
National Weather Service Shreveport LA
801 PM CDT Tue May 26 2020

ARZ050-051-059>061-070>073-LAZ001>006-010>014-017>022-OKZ077-
TXZ096-097-108>112-124>126-136>138-149>153-165>167-280115-
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-
801 PM CDT Tue May 26 2020

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...Tonight...

Thunderstorms will gradually decrease in intensity as the evening
progresses. A couple of isolated strong thunderstorms could
produce gusty winds and moderate to heavy rainfall.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday...

Thunderstorms will remain in the forecast through end of the work
week as a closed low meanders near the region. An isolated strong
to severe thunderstorm cannot be ruled out, but widespread severe
weather is not anticipated. Locally heavy rainfall could lead to
isolated flash flooding in some areas.

.SPOTTER INFORMATION STATEMENT...

Activation of emergency management personnel...amateur radio
operators...and storm spotters will not be needed today.

In the hours before

Special weather statement, May 26, 11:09 PM CDT, 1 hour 34 minutes before
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Special weather statement, May 26, 11:46 PM CDT, 57 minutes before
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Special weather statement, May 26, 11:53 PM CDT, 50 minutes before
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Local storm report, May 26, 11:54 PM CDT, 49 minutes before
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Special weather statement, May 27, 12:11 AM CDT, 32 minutes before
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Special weather statement, May 27, 12:27 AM CDT, 16 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
May 26, 7:16 PM CDTSpecial Weather StatementSHVMarion59 min
May 26, 7:25 PM CDTSpecial Weather StatementSHVBowie65 min
May 26, 7:44 PM CDTSpecial Weather StatementSHVHarrison61 min
May 26, 7:50 PM CDTAreal Flood AdvisorySHVHarrison, Marion3 hr
May 26, 7:50 PM CDTSevere Thunderstorm WarningSHVHarrison27 min
May 26, 7:54 PM CDTAreal Flood AdvisorySHVBowie, Cass26 hr
May 26, 8:27 PM CDTFlash Flood WarningSHVHarrison, Marion3 hr
May 26, 8:29 PM CDTSpecial Weather StatementSHVBowie61 min
May 26, 8:36 PM CDTSpecial Weather StatementSHVCass54 min
May 26, 9:09 PM CDTSpecial Weather StatementSHVBowie51 min
May 26, 9:12 PM CDTSevere Thunderstorm WarningSHVBowie32 min
May 26, 9:46 PM CDTSpecial Weather StatementSHVBowie44 min
May 27, 12:11 AM CDTSpecial Weather StatementSHVSabine49 min
May 27, 2:01 PM CDTSpecial Weather StatementSHVBowie44 min
May 27, 3:40 PM CDTSpecial Weather StatementSHVRed River35 min
May 27, 3:56 PM CDTSpecial Weather StatementSHVCamp34 min
May 27, 4:30 PM CDTSpecial Weather StatementSHVCamp30 min
May 26, 7:18 PM CDTSpecial Weather StatementSHVCaddo57 min
May 26, 8:26 PM CDTSpecial Weather StatementSHVCaddo64 min
May 26, 8:50 PM CDTSpecial Weather StatementSHVBossier55 min
May 26, 8:57 PM CDTSevere Thunderstorm WarningSHVBossier, Caddo36 min
May 26, 9:29 PM CDTSpecial Weather StatementSHVCaddo46 min
May 26, 9:47 PM CDTSpecial Weather StatementSHVWebster43 min
May 26, 9:55 PM CDTSpecial Weather StatementSHVCaddo50 min
May 26, 9:57 PM CDTSpecial Weather StatementSHVBossier, Webster63 min
May 26, 10:11 PM CDTAreal Flood AdvisorySHVBossier, Caddo3 hr
May 26, 10:17 PM CDTSpecial Weather StatementSHVCaddo43 min
May 26, 10:57 PM CDTSpecial Weather StatementSHVClaiborne, Webster63 min
May 26, 11:00 PM CDTSpecial Weather StatementSHVDe Soto60 min
May 26, 11:09 PM CDTSpecial Weather StatementSHVBienville66 min
May 26, 11:15 PM CDTSevere Thunderstorm WarningSHVClaiborne, Webster45 min
May 26, 11:29 PM CDTSevere Thunderstorm WarningSHVBossier, Caddo, De Soto, Red River32 min
May 26, 11:46 PM CDTSpecial Weather StatementSHVRed River44 min
May 26, 11:53 PM CDTSpecial Weather StatementSHVBienville67 min
May 26, 11:55 PM CDTSevere Thunderstorm WarningSHVClaiborne57 min
May 27, 12:27 AM CDTSpecial Weather StatementSHVLincoln48 min
May 27, 1:03 AM CDTSpecial Weather StatementSHVJackson, Lincoln, Union42 min
May 27, 1:28 AM CDTAreal Flood AdvisorySHVLincoln, Union3 hr
May 27, 1:45 AM CDTSpecial Weather StatementSHVJackson, Union45 min
May 27, 2:09 AM CDTSpecial Weather StatementSHVOuachita51 min
May 27, 4:29 AM CDTSpecial Weather StatementSHVOuachita46 min
May 27, 5:24 AM CDTSpecial Weather StatementSHVOuachita51 min
May 27, 6:22 AM CDTSpecial Weather StatementSHVOuachita23 min
May 27, 6:24 AM CDTSpecial Weather StatementSHVCaldwell66 min
May 27, 3:48 PM CDTSpecial Weather StatementSHVBossier27 min
May 27, 4:15 PM CDTSpecial Weather StatementSHVBossier30 min
May 27, 5:23 PM CDTSpecial Weather StatementSHVLincoln37 min
May 26, 7:14 PM CDTSpecial Weather StatementSHVLafayette61 min
May 26, 7:28 PM CDTSpecial Weather StatementSHVLittle River62 min
May 26, 8:16 PM CDTSpecial Weather StatementSHVMiller44 min
May 26, 8:34 PM CDTSpecial Weather StatementSHVLittle River56 min
May 27, 1:13 AM CDTSpecial Weather StatementSHVUnion47 min
May 27, 2:02 PM CDTSpecial Weather StatementSHVMiller43 min

Nearby

Severe Thunderstorm Warnings in Arkansas, 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.