Alert archive / Arkansas / Severe Thunderstorm Warnings in 2020

Severe Thunderstorm Warning 18, NWS Shreveport, LA

February 9, 2020Columbia County, Lafayette County, Nevada County, Arkansas

NWS Shreveport, LA issued this severe thunderstorm warning at Feb 9, 2020, 9:59 PM CST for Columbia County, Lafayette County, Nevada County, Arkansas. It was in force for 31 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
Feb 9, 2020, 9:59 PM CST (03:59 UTC)
Expired
Feb 9, 2020, 10:30 PM CST
In force
31 min
Issued by
NWS Shreveport, LA
Area
Storm-based polygon
Hail
1.0 in
Wind
50.0 mph

Counties Columbia County, AR, Lafayette County, AR, Nevada County, AR

The radar

The Shreveport radar (KSHV), 111 km from the middle of the area, began a volume at 04:02 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 nearest sounding before it

Jackson, MS (KJAN), launched 00:00Z, 4.0 hours before the alert went out and 330 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, Jackson, MS at 00:00Z on 2020-02-10Temperature 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, Jackson, MS at 00:00Z on 2020-02-10The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 73 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1619 m above ground
0-6 km bulk shear
50 kt
0-1 km storm-relative helicity
73 m²/s²
0-3 km storm-relative helicity
219 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 Feb 9, 8:35 PM CST, 1 hour 24 minutes earlier.

Area forecast discussion, Feb 9, 8:35 PM CST, 1 hour 24 minutes before
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Hazardous weather outlook, Feb 9, 11:49 AM CST, 10 hours 10 minutes before
Hazardous Weather Outlook
National Weather Service Shreveport LA
1149 AM CST Sun Feb 9 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>167-101800-
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-
1149 AM CST Sun Feb 9 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...This Afternoon and Tonight...

A cold front will shift southeast across the region late tonight
through Monday, bringing showers to the area this afternoon and
thunderstorms this evening into the overnight hours. A few of the
storms in East Texas, Deep East Texas, northwest Louisiana,
southwestern Arkansas, and southeastern Oklahoma may become strong
to severe with large hail, damaging winds, and an isolated
tornado possible.

.DAYS TWO THROUGH SEVEN...Monday through Saturday...

A frontal boundary will stall in the region and a series of
disturbances will cross the area Monday through Wednesday. This
will lead to several rounds of showers and thunderstorms with
localized heavy rainfall at times.

On Monday afternoon, an isolated severe thunderstorm with large
hail and damaging winds cannot be ruled out across portions of
Deep East Texas, central Louisiana and the ArkLaMiss. On
Wednesday, severe thunderstorms will be possible for central
Louisiana and the ArkLaMiss with large hail, damaging winds, and
tornadoes possible.

Total rainfall amounts for the event will range from 4 to 6
inches along an axis from Deep East Texas across northwest
Louisiana and into the ArkLaMiss. Elsewhere, 2 to 4 inches of rain
will be possible. This could lead to flash flooding, particularly
in flood prone areas.

.SPOTTER INFORMATION STATEMENT...

Activation of emergency management personnel...amateur radio
operators...and storm spotters may be needed this evening into
Wednesday.

The office that day

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

IssuedProductOfficeCountiesLasted
Feb 10, 5:09 AM CSTSpecial Weather StatementSHVPanola36 min
Feb 10, 7:15 AM CSTSpecial Weather StatementSHVNacogdoches30 min
Feb 10, 9:58 AM CSTRiver Flood WarningSHVFranklin, Morris, Red River, Titus6 days
Feb 10, 9:58 AM CSTRiver Flood WarningSHVFranklin, Morris, Titus7 days
Feb 10, 10:00 AM CSTRiver Flood WarningSHVCass, Marion12 days
Feb 10, 1:48 AM CSTSpecial Weather StatementSHVRed River27 min
Feb 10, 2:13 AM CSTSpecial Weather StatementSHVBienville47 min
Feb 10, 2:47 AM CSTSpecial Weather StatementSHVLincoln, Union28 min
Feb 10, 9:53 AM CSTRiver Flood WarningSHVBienville, Bossier, Red River, Webster21 days
Feb 10, 9:53 AM CSTRiver Flood WarningSHVBienville, Bossier, Webster21 days
Feb 10, 10:28 AM CSTAreal Flood AdvisorySHVBossier, Caddo2 hr
Feb 10, 10:43 AM CSTRiver Flood WarningSHVCaldwell, Grant, LaSalle, Winn19 days
Feb 10, 12:53 PM CSTFlash Flood WarningSHVBossier, Caddo, De Soto3 hr
Feb 10, 1:29 PM CSTAreal Flood AdvisorySHVJackson, Lincoln, Ouachita, Union3 hr
Feb 10, 1:44 PM CSTFlash Flood WarningSHVBienville, Bossier, Claiborne, Webster3 hr
Feb 10, 2:19 PM CSTFlash Flood WarningSHVClaiborne, Jackson, Lincoln, Union3 hr
Feb 9, 9:27 PM CSTSevere Thunderstorm WarningSHVLafayette, Miller17 min
Feb 9, 11:41 PM CSTSevere Thunderstorm WarningSHVHempstead, Howard, Little River, Nevada, Sevier28 min
Feb 10, 12:58 PM CSTSpecial Weather StatementSHVColumbia47 min
Feb 10, 4:11 PM CSTSpecial Weather StatementSHVLafayette, Nevada49 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.