Alert archive / Louisiana / Severe Thunderstorm Warnings in 2024

Severe Thunderstorm Warning 129, NWS Shreveport, LA

May 9, 2024Grant Parish, Winn Parish, Louisiana

NWS Shreveport, LA issued this severe thunderstorm warning at May 9, 2024, 10:12 PM CDT for Grant Parish, Winn Parish, Louisiana. It was in force for 32 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 9, 2024, 10:12 PM CDT (03:12 UTC)
Expired: May 9, 2024, 10:44 PM CDT
In force: 32 min
Issued by: NWS Shreveport, LA
Area: Storm-based polygon
Damage threat: Considerable
Hail: 2.0 in
Wind: 60.0 mph

Counties Grant Parish, LA, Winn Parish, LA

The radar

The Ft Polk radar (KPOE), 77 km from the middle of the area, began a volume at 03:15 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.

Issued	Product	Office	Lasted
May 9, 5:46 PM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Jackson, MS (KJAN), launched 00:00Z, 3.2 hours before the alert went out and 245 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 4062 J/kg
Mixed-layer CIN: -10 J/kg
Mixed-layer LCL: 1056 m above ground
0-6 km bulk shear: 56 kt
0-1 km storm-relative helicity: 20 m²/s²
0-3 km storm-relative helicity: 49 m²/s²
Significant tornado parameter: 1.1
Supercell composite: 5.2

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 9, 8:45 PM CDT, 1 hour 27 minutes earlier.

Area forecast discussion, May 9, 8:45 PM CDT, 1 hour 27 minutes before

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Hazardous weather outlook, May 9, 2:36 PM CDT, 7 hours 36 minutes before

Hazardous Weather Outlook
National Weather Service Shreveport LA
236 PM CDT Thu May 9 2024

ARZ050-051-059>061-070>073-LAZ001>006-010>014-017>022-OKZ077-TXZ096-
097-108>112-124>126-136>138-149>153-165>167-101945-
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-
236 PM CDT Thu May 9 2024

This Hazardous Weather Outlook is for south central Arkansas,
southwest Arkansas, north central Louisiana, northwest Louisiana,
southeast Oklahoma, east Texas and northeast Texas.

.DAY ONE...This afternoon and tonight.

Showers and thunderstorms are expected to redevelop this afternoon
and evening near the slow moving front, with the severe weather
threat for damaging winds, hail and an embedded tornado or two over
the region later this evening into the overnight hours.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

The end of the week into the start of the weekend will begin quietly
as high pressure dominates the local area. Showers and thunderstorms
will return by Sunday afternoon into most of next week.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will likely be needed.

16

In the hours before

Local storm report, May 9, 9:03 PM CDT, 1 hour 9 minutes before

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Local storm report, May 9, 9:26 PM CDT, 46 minutes before

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Local storm report, May 9, 9:35 PM CDT, 37 minutes before

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Local storm report, May 9, 9:47 PM CDT, 25 minutes before

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Local storm report, May 9, 9:49 PM CDT, 23 minutes before

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Local storm report, May 9, 9:55 PM CDT, 17 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
May 9, 7:34 PM CDT	Severe Thunderstorm Warning	SHV	Harrison, Panola	43 min
May 9, 7:55 PM CDT	Severe Thunderstorm Warning Considerable damage threat	SHV	Angelina	50 min
May 9, 8:44 PM CDT	Severe Thunderstorm Warning	SHV	Angelina	29 min
May 10, 2:12 PM CDT	River Flood Warning	SHV	Franklin, Morris, Red River, Titus	21 hr
May 9, 7:12 PM CDT	Special Weather Statement	SHV	Jackson, Ouachita	63 min
May 9, 7:15 PM CDT	Special Weather Statement	SHV	Caddo	45 min
May 9, 7:18 PM CDT	Special Weather Statement	SHV	De Soto	57 min
May 9, 7:29 PM CDT	Special Weather Statement	SHV	Red River	61 min
May 9, 7:32 PM CDT	Severe Thunderstorm Warning	SHV	Bossier, Caddo, De Soto	58 min
May 9, 7:40 PM CDT	Severe Thunderstorm Warning	SHV	Bienville, Natchitoches, Red River	65 min
May 9, 7:52 PM CDT	Severe Thunderstorm Warning	SHV	Ouachita	41 min
May 9, 8:13 PM CDT	Severe Thunderstorm Warning	SHV	Bienville, Bossier, Webster	47 min
May 9, 8:28 PM CDT	Flash Flood Warning	SHV	Ouachita	3 hr
May 9, 8:29 PM CDT	Severe Thunderstorm Warning	SHV	Bienville, Natchitoches, Red River, Winn	46 min
May 9, 8:38 PM CDT	Flash Flood Warning	SHV	Caddo	3 hr
May 9, 8:51 PM CDT	Special Weather Statement	SHV	Red River	39 min
May 9, 9:12 PM CDT	Flash Flood Warning	SHV	Bienville, Natchitoches, Red River	3 hr
May 9, 9:36 PM CDT	Severe Thunderstorm Warning	SHV	Grant, Natchitoches, Winn	39 min
May 9, 10:27 PM CDT	Special Weather Statement	SHV	Grant	33 min
May 9, 10:43 PM CDT	Severe Thunderstorm Warning	SHV	Grant, LaSalle, Winn	47 min
May 9, 11:29 PM CDT	Special Weather Statement	SHV	LaSalle	31 min

Nearby

Severe Thunderstorm Warnings in Louisiana, 2024 Every severe thunderstorm warning in 2024

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.