Alert archive / Texas / Severe Thunderstorm Warnings in 2023

Severe Thunderstorm Warning 161, NWS Shreveport, LA

April 15, 2023Sabine County, San Augustine County, Texas; Natchitoches Parish, Sabine Parish, Louisiana

NWS Shreveport, LA issued this severe thunderstorm warning at Apr 15, 2023, 9:30 PM CDT for Sabine County, San Augustine County, Texas; Natchitoches Parish, Sabine Parish, Louisiana. It was in force for 30 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
Apr 15, 2023, 9:30 PM CDT (02:30 UTC)
Expired
Apr 15, 2023, 10:00 PM CDT
In force
30 min
Issued by
NWS Shreveport, LA
Area
Storm-based polygon
Hail
1.25 in
Wind
60.0 mph

Counties Natchitoches Parish, LA, Sabine Parish, LA, Sabine County, TX, San Augustine County, TX

The radar

The Ft Polk radar (KPOE), 76 km from the middle of the area, began a volume at 02:33 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Apr 15, 4:13 PM CDTSevere Thunderstorm WatchSPC6 hr

The nearest sounding before it

Shreveport, LA (KSHV), launched 00:00Z, 2.5 hours before the alert went out and 109 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 2023-04-16Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1709 joules per kilogram.LCLEL10008507005003002001001 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 2023-04-16The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 116 square meters per square second.193958Sfc1 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
1709 J/kg
Mixed-layer CIN
-12 J/kg
Mixed-layer LCL
1811 m above ground
0-6 km bulk shear
45 kt
0-1 km storm-relative helicity
116 m²/s²
0-3 km storm-relative helicity
133 m²/s²
Significant tornado parameter
0.2
Supercell composite
11.4

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 Apr 15, 9:21 PM CDT, 9 minutes earlier.

Area forecast discussion, Apr 15, 9:21 PM CDT, 9 minutes before
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Hazardous weather outlook, Apr 15, 1:20 PM CDT, 8 hours 10 minutes before
Hazardous Weather Outlook...UPDATED
National Weather Service Shreveport LA
120 PM CDT Sat Apr 15 2023

ARZ050-051-059>061-070>073-LAZ001>006-010>014-017>022-OKZ077-TXZ096-
097-108>112-124>126-136>138-149>153-165>167-161830-
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-
120 PM CDT Sat Apr 15 2023

This Hazardous Weather Outlook is for our four state area of southern
Arkansas, northern Louisiana, eastern Texas and southeast Oklahoma.

.DAY ONE...This afternoon and tonight.

Showers and thunderstorms will quickly develop ahead of a cold front
this afternoon and then continue sweeping eastward after sunset. The
air will remain unstable well into the evening hours with mid to
upper 80 highs today and any of these Thunderstorms could reach
severe limits. The Storm Prediction Center maintains the Enhanced
Risk for hail and damaging winds with the frontal timing across I-30
late this afternoon. This will focus potential development right over
southern Arkansas and northern Louisiana late today. Please see the
latest SPC graphics on our Facebook and Twitter pages or on our home
page at weather.gov/shv. Once again, large hail and damaging winds
will be the primary threats for us, but an isolated tornado cannot
be completely ruled out.

.DAYS TWO THROUGH SEVEN...Sunday through Friday.

Dry conditions will settle in through the rest of the weekend and
into the start of next week. A series of systems will begin to move
into the region towards the middle of next week. Another round for
severe weather could be possible across portions of the area on
Thursday.

.SPOTTER INFORMATION STATEMENT...

Spotter activation may be needed this afternoon or evening.

24

In the hours before

Local storm report, Apr 15, 8:58 PM CDT, 32 minutes before
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Local storm report, Apr 15, 9:01 PM CDT, 29 minutes before
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Local storm report, Apr 15, 9:08 PM CDT, 22 minutes before
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Special weather statement, Apr 15, 9:12 PM CDT, 18 minutes before
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Local storm report, Apr 15, 9:13 PM CDT, 17 minutes before
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Local storm report, Apr 15, 9:17 PM CDT, 13 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Apr 15, 7:43 PM CDTSevere Thunderstorm WarningSHVSabine62 min
Apr 15, 8:07 PM CDTSpecial Weather StatementSHVSabine23 min
Apr 15, 8:26 PM CDTSevere Thunderstorm WarningSHVSabine, San Augustine64 min
Apr 15, 8:32 PM CDTSpecial Weather StatementSHVAngelina28 min
Apr 15, 7:00 PM CDTSevere Thunderstorm Warning Destructive damage threatSHVBienville, Red River60 min
Apr 15, 7:04 PM CDTSpecial Weather StatementSHVSabine26 min
Apr 15, 7:13 PM CDTTornado WarningSHVBienville47 min
Apr 15, 7:26 PM CDTSevere Thunderstorm WarningSHVBienville, Bossier, Claiborne, Webster64 min
Apr 15, 7:29 PM CDTSpecial Weather StatementSHVDe Soto31 min
Apr 15, 7:45 PM CDTSevere Thunderstorm WarningSHVGrant, Natchitoches, Winn49 min
Apr 15, 7:58 PM CDTSevere Thunderstorm WarningSHVBienville, Claiborne, Lincoln, Union62 min
Apr 15, 8:01 PM CDTSevere Thunderstorm WarningSHVGrant, Natchitoches, Sabine, Winn59 min
Apr 15, 8:04 PM CDTSevere Thunderstorm WarningSHVBienville, Bossier, Caddo, De Soto, Red River, Webster56 min
Apr 15, 8:16 PM CDTSpecial Weather StatementSHVClaiborne44 min
Apr 15, 8:29 PM CDTSevere Thunderstorm WarningSHVClaiborne, Union61 min
Apr 15, 9:12 PM CDTSpecial Weather StatementSHVGrant, Natchitoches33 min
Apr 15, 9:51 PM CDTSpecial Weather StatementSHVGrant39 min
Apr 15, 7:09 PM CDTSevere Thunderstorm WarningSHVColumbia, Union66 min
Apr 15, 8:12 PM CDTSevere Thunderstorm WarningSHVUnion63 min

Nearby

Severe Thunderstorm Warnings in Texas, 2023Severe Thunderstorm Warnings in Louisiana, 2023Every severe thunderstorm warning in 2023

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.