Alert archive / Texas / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 121, NWS Shreveport, LA

March 7, 1998Shelby County, Texas

NWS Shreveport, LA issued this severe thunderstorm warning at Mar 7, 1998, 10:11 AM CST for Shelby County, Texas. It was in force for 49 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
Mar 7, 1998, 10:11 AM CST (16:11 UTC)
Expired
Mar 7, 1998, 11:00 AM CST
In force
49 min
Issued by
NWS Shreveport, LA
Area
Whole counties

County Shelby County, TX

The radar

The Shreveport radar (KSHV), 79 km from the middle of the area, began a volume at 16:12 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
Mar 7, 8:45 AM CSTTornado WatchSPC5 hr

The nearest sounding before it

Shreveport, LA (KSHV), launched 12:00Z, 4.2 hours before the alert went out and 85 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 1998-03-07Temperature 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, Shreveport, LA at 12:00Z on 1998-03-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 226 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
472 m above ground
0-6 km bulk shear
66 kt
0-1 km storm-relative helicity
226 m²/s²
0-3 km storm-relative helicity
292 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.4

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.

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 Mar 7, 9:45 AM CST, 26 minutes earlier.

Area forecast discussion, Mar 7, 9:45 AM CST, 26 minutes before
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In the hours before

Local storm report, Mar 7, 6:15 AM CST, 3 hours 56 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SHREVEPORT LA
615 AM CST SAT MAR 07 1998

TIME(CST)  .....CITY LOCATION..... STATE  ...EVENT/REMARKS...
           ....PARISH/COUNTY LOCATION....

0115 AM    5 SE MONROE               LA   .75 INCH HAIL
03/07/98   OUACHITA

0315 AM    2 SW QUITMAN              TX   .75 INCH HAIL
03/07/98   WOOD

0523 AM    5 W MOUNT VERNON          TX   1.5 INCH HAIL
03/07/98   FRANKLIN

0535 AM    ROGERS                    LA   4.5 INCH HAIL
03/07/98   LA SALLE                       SOFTBALL SIZE HAIL DAMAGED
                                          CARS...INCLUDING BREAKING
                                          OF CAR WINDOWS

0540 AM    NEBO                      LA   2.75 INCH HAIL
03/07/98   LA SALLE                       BASEBALL SIZE HAIL

0550 AM    1 E JENA                  LA   2.75 INCH HAIL
03/07/98   LA SALLE                       BASEBALL SIZE HAIL
Local storm report, Mar 7, 9:14 AM CST, 57 minutes before
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Local storm report, Mar 7, 9:43 AM CST, 28 minutes before
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Local storm report, Mar 7, 9:43 AM CST, 28 minutes before
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Special weather statement, Mar 7, 10:00 AM CST, 11 minutes before
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Special weather statement, Mar 7, 10:00 AM CST, 11 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Mar 6, 10:34 PM CSTSevere Thunderstorm WarningSHVSan Augustine31 min
Mar 7, 3:08 AM CSTSevere Thunderstorm WarningSHVWood32 min
Mar 7, 4:23 AM CSTSevere Thunderstorm WarningSHVCass47 min
Mar 7, 5:14 AM CSTSevere Thunderstorm WarningSHVFranklin46 min
Mar 7, 7:48 AM CSTSevere Thunderstorm WarningSHVAngelina47 min
Mar 7, 8:20 AM CSTTornado WarningSHVAngelina50 min
Mar 7, 8:44 AM CSTSevere Thunderstorm WarningSHVSabine, San Augustine46 min
Mar 7, 1:43 PM CSTSevere Thunderstorm WarningSHVMarion37 min
Mar 6, 6:56 PM CSTSevere Thunderstorm WarningSHVNatchitoches49 min
Mar 7, 12:54 AM CSTSevere Thunderstorm WarningSHVOuachita51 min
Mar 7, 5:28 AM CSTSevere Thunderstorm WarningSHVLaSalle62 min
Mar 7, 7:00 AM CSTSevere Thunderstorm WarningSHVGrant50 min
Mar 7, 7:07 AM CSTSevere Thunderstorm WarningSHVLaSalle48 min
Mar 7, 7:40 AM CSTSevere Thunderstorm WarningSHVWinn35 min
Mar 7, 7:52 AM CSTSevere Thunderstorm WarningSHVJackson48 min
Mar 7, 8:47 AM CSTSevere Thunderstorm WarningSHVBienville63 min
Mar 7, 9:07 AM CSTSevere Thunderstorm WarningSHVSabine63 min
Mar 7, 9:45 AM CSTSevere Thunderstorm WarningSHVDe Soto50 min
Mar 7, 10:52 AM CSTSevere Thunderstorm WarningSHVClaiborne, Union33 min
Mar 7, 11:17 AM CSTSevere Thunderstorm WarningSHVLaSalle33 min
Mar 7, 5:46 PM CSTSevere Thunderstorm WarningSHVSabine49 min
Mar 7, 8:28 AM CSTSevere Thunderstorm WarningSHVHoward32 min
Mar 7, 11:02 AM CSTSevere Thunderstorm WarningSHVUnion48 min
Mar 7, 11:33 AM CSTSevere Thunderstorm WarningSHVLittle River, Sevier62 min
Mar 7, 12:23 PM CSTSevere Thunderstorm WarningSHVHempstead32 min

Nearby

Severe Thunderstorm Warnings in Texas, 1998Every severe thunderstorm warning in 1998

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.