Alert archive / Louisiana / Severe Thunderstorm Warnings in 1991

Severe Thunderstorm Warning 166, NWS Shreveport, LA

May 3, 1991Claiborne Parish, Webster Parish, Louisiana

NWS Shreveport, LA issued this severe thunderstorm warning at May 3, 1991, 7:28 AM CDT for Claiborne Parish, Webster Parish, Louisiana. It was in force for 62 min. 4 reports came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued
May 3, 1991, 7:28 AM CDT (12:28 UTC)
Expired
May 3, 1991, 8:30 AM CDT
In force
62 min
Issued by
NWS Shreveport, LA
Area
Whole counties

Counties Claiborne Parish, LA, Webster Parish, LA

What was reported inside it

TimeReportWhereRemark
May 3, 8:20 AM CDTHail 0.9Claiborne, LA
May 3, 8:20 AM CDTThunderstorm Wind 0Claiborne, LA
May 3, 8:28 AM CDTHail 1.75Webster, LA
May 3, 8:32 AM CDTHail 1.75Claiborne, LA

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in. Storm Data before 1996 records only tornadoes, thunderstorm wind and hail.

The nearest sounding before it

Jackson, MS (KJAN), launched 12:00Z, 0.5 hours before the alert went out and 293 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 12:00Z on 1991-05-03Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 378 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, Jackson, MS at 12:00Z on 1991-05-03The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 3 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
378 J/kg
Mixed-layer CIN
-130 J/kg
Mixed-layer LCL
767 m above ground
0-6 km bulk shear
21 kt
0-1 km storm-relative helicity
3 m²/s²
0-3 km storm-relative helicity
66 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

The office that day

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

IssuedProductOfficeCountiesLasted
May 3, 4:57 AM CDTSevere Thunderstorm WarningSHVBossier, Caddo93 min
May 3, 5:45 AM CDTSevere Thunderstorm WarningSHVDe Soto60 min
May 3, 6:28 AM CDTSevere Thunderstorm WarningSHVBossier, Webster62 min
May 3, 6:28 AM CDTSevere Thunderstorm WarningSHVCaddo, De Soto62 min
May 3, 6:40 AM CDTFlash Flood WarningSHVCaddo3 hr
May 3, 6:40 AM CDTFlash Flood WarningSHVBossier, Webster3 hr
May 3, 7:28 AM CDTSevere Thunderstorm WarningSHVBossier, Caddo, De Soto, Red River62 min
May 3, 8:08 AM CDTFlash Flood WarningSHVBienville, Claiborne, Lincoln, Union3 hr
May 3, 8:08 AM CDTSevere Thunderstorm WarningSHVBienville, Claiborne, Lincoln, Union3 hr
May 3, 8:59 AM CDTFlash Flood WarningSHVMorehouse, Richland, West Carroll3 hr
May 3, 8:59 AM CDTFlash Flood WarningSHVJackson, Ouachita3 hr
May 3, 8:59 AM CDTSevere Thunderstorm WarningSHVJackson, Ouachita3 hr
May 3, 8:59 AM CDTSevere Thunderstorm WarningSHVMorehouse, Richland, West Carroll3 hr
May 3, 9:41 AM CDTFlash Flood WarningSHVBossier, Webster4 hr
May 3, 9:41 AM CDTFlash Flood WarningSHVCaddo, De Soto4 hr
May 3, 12:00 PM CDTFlash Flood WarningSHVJackson, Morehouse, Ouachita, Richland2 hr
May 3, 12:00 PM CDTFlash Flood WarningSHVWest Carroll2 hr
May 3, 3:25 AM CDTSevere Thunderstorm WarningSHVBowie, Cass65 min
May 3, 4:23 AM CDTSevere Thunderstorm WarningSHVMarion67 min
May 3, 4:39 AM CDTSevere Thunderstorm WarningSHVGregg66 min
May 3, 5:03 AM CDTSevere Thunderstorm WarningSHVRusk42 min
May 3, 9:41 AM CDTFlash Flood WarningSHVGregg, Harrison, Rusk4 hr
May 3, 5:00 PM CDTFlash Flood WarningSHVGregg, Harrison, Rusk4 hr
May 3, 5:00 PM CDTFlash Flood WarningSHVBowie, Cass4 hr
May 3, 5:00 PM CDTFlash Flood WarningSHVPanola, Shelby4 hr
May 3, 5:00 PM CDTFlash Flood WarningSHVMarion4 hr
May 3, 4:23 AM CDTSevere Thunderstorm WarningSHVMiller67 min

Nearby

Severe Thunderstorm Warnings in Louisiana, 1991Every severe thunderstorm warning in 1991

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.