Alert archive / Arkansas / Special Weather Statements in 2021

Special Weather Statement, NWS Shreveport, LA

July 27, 2021Columbia County, Arkansas

NWS Shreveport, LA issued this special weather statement at Jul 27, 2021, 8:05 AM CDT for Columbia County, Arkansas. It was in force for 25 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
Jul 27, 2021, 8:05 AM CDT (13:05 UTC)
Expired
Jul 27, 2021, 8:30 AM CDT
In force
25 min
Issued by
NWS Shreveport, LA

County Columbia County, AR

The radar

The Shreveport radar (KSHV), 114 km from the middle of the area, began a volume at 13:06 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 12:00Z, 1.1 hours before the alert went out and 106 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 12:00Z on 2021-07-27Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1955 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 12:00Z on 2021-07-27The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -6 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
1955 J/kg
Mixed-layer CIN
-28 J/kg
Mixed-layer LCL
1196 m above ground
0-6 km bulk shear
19 kt
0-1 km storm-relative helicity
-6 m²/s²
0-3 km storm-relative helicity
8 m²/s²
Significant tornado parameter
0.0
Supercell composite
-0.4

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 Jul 27, 6:34 AM CDT, 1 hour 31 minutes earlier.

Area forecast discussion, Jul 27, 6:34 AM CDT, 1 hour 31 minutes before
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Hazardous weather outlook, Jul 27, 5:44 AM CDT, 2 hours 21 minutes before
Hazardous Weather Outlook
National Weather Service Shreveport LA
544 AM CDT Tue Jul 27 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>167-281100-
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-
544 AM CDT Tue Jul 27 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...Today and Tonight...

A Heat Advisory is in effect today for all of the Four State
Region. Temperatures will again climb into the mid 90s this
afternoon across the area, and when combined with the humidity,
will result in heat indices ranging from 105 to 110 degrees. In
addition, scattered showers and thunderstorms are expected to
develop today over much of the area, as an upper level disturbance
drifts west southwest over the region. Isolated strong storms can
not be ruled out, with locally gusty winds and brief heavy
rainfall possible. These storms will gradually diminish later this
evening.

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

Hot and humid conditions will continue across the region
throughout the remainder of this week through this weekend, with
heat indices nearing or exceeding 105 degrees each day. Isolated
to widely scattered showers and thunderstorms will be possible
Wednesday over East Texas and North Louisiana, as an upper level
disturbance lingers over these areas. Any showers and
thunderstorms will become more isolated Thursday through the
weekend over Deep East Texas and Northcentral Louisiana, as an
upper level ridge of high pressure builds southeast into the
region. This will also result in the hottest temperatures so far
this summer across the area, with readings nearing 100 degrees.
However, a weak cool front will begin to drift south into the
region Monday, which will focus an increase in showers and
thunderstorms, as well as slightly cooler temperatures.

.SPOTTER INFORMATION STATEMENT...

Activation of emergency management personnel...amateur radio
operators...and storm spotters should not be needed through
tonight.

15

In the hours before

Special weather statement, Jul 27, 8:05 AM CDT, 0 minutes before
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        The site you requested is temporarily down for maintenance or an unexpected outage.
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The office that day

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

IssuedProductOfficeCountiesLasted
Jul 27, 2:18 PM CDTHeat AdvisorySHVAngelina, Bowie, Camp, Cass, Cherokee, Franklin and 15 more29 hr
Jul 27, 2:21 PM CDTSpecial Weather StatementSHVBowie39 min
Jul 27, 3:23 PM CDTSpecial Weather StatementSHVMorris52 min
Jul 27, 6:54 PM CDTSpecial Weather StatementSHVSan Augustine51 min
Jul 27, 2:13 PM CDTSpecial Weather StatementSHVLaSalle47 min
Jul 27, 3:38 PM CDTSevere Thunderstorm WarningSHVBienville52 min
Jul 27, 4:01 PM CDTSpecial Weather StatementSHVBienville44 min
Jul 27, 4:29 PM CDTSpecial Weather StatementSHVRed River31 min
Jul 27, 4:38 PM CDTSpecial Weather StatementSHVBienville37 min
Jul 27, 4:57 PM CDTSpecial Weather StatementSHVRed River33 min
Jul 27, 5:04 PM CDTSpecial Weather StatementSHVRed River26 min
Jul 27, 5:53 PM CDTSpecial Weather StatementSHVClaiborne37 min
Jul 27, 6:01 PM CDTSpecial Weather StatementSHVSabine44 min
Jul 27, 6:19 PM CDTSevere Thunderstorm WarningSHVSabine41 min
Jul 27, 3:05 PM CDTSpecial Weather StatementSHVSevier40 min
Jul 27, 3:30 PM CDTSpecial Weather StatementSHVNevada45 min
Jul 27, 3:46 PM CDTSpecial Weather StatementSHVSevier44 min
Jul 27, 4:21 PM CDTSpecial Weather StatementSHVSevier39 min
Jul 27, 5:17 PM CDTSpecial Weather StatementSHVUnion28 min
Jul 27, 5:37 PM CDTSpecial Weather StatementSHVHempstead23 min
Jul 27, 5:57 PM CDTSpecial Weather StatementSHVLittle River33 min
Jul 27, 3:55 PM CDTSpecial Weather StatementSHVMcCurtain50 min

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.