Alert archive / Texas / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 108, NWS Shreveport, LA

March 7, 1998Cass County, Texas

NWS Shreveport, LA issued this severe thunderstorm warning at Mar 7, 1998, 4:23 AM CST for Cass County, Texas. It was in force for 47 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, 4:23 AM CST (10:23 UTC)
Expired
Mar 7, 1998, 5:10 AM CST
In force
47 min
Issued by
NWS Shreveport, LA
Area
Whole counties

County Cass County, TX

The radar

The Shreveport radar (KSHV), 84 km from the middle of the area, began a volume at 10:22 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

Fort Worth, TX (KFWD), launched 00:00Z, 10.4 hours before the alert went out and 276 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, Fort Worth, TX at 00:00Z on 1998-03-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 3 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, Fort Worth, TX at 00:00Z on 1998-03-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 206 square meters per square second.1939587897117136Sfc1 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
3 J/kg
Mixed-layer CIN
0 J/kg
Mixed-layer LCL
516 m above ground
0-6 km bulk shear
44 kt
0-1 km storm-relative helicity
206 m²/s²
0-3 km storm-relative helicity
474 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.3

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, 3:00 AM CST, 1 hour 23 minutes earlier.

Area forecast discussion, Mar 7, 3:00 AM CST, 1 hour 23 minutes before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SHREVEPORT LA
300 AM CST SAT MAR 7 1998

UPPER LOW OVER THE SOUTHWEST WILL MOVE EAST AND BE OVER NORTHERN AR
BY 48 HOURS. WITH SURFACE LOW DEVELOPING OVER WEST TX TODAY AND MOVING
TO SOUTHERN ILLINOIS BY END OF PERIOD. FRONTAL BOUNDARY EARLY THIS
MORNING FROM NEAR BRO TO JAN SHOULD MOVE NORTH TODAY AND SERVE AS FOCUS
FOR POSSIBLE SEVERE TSTMS TODAY...AND POSSIBLY SOME AGAIN THIS EVENING
AS FRONT/DRY LINE MOVES ACROSS AREA. EXPECT FRONT TO EXTEND FROM
NORTHWEST AR TO NEAR SHV TO NEAR HOU BY 07/06Z...BUT WINDS SHOULD
REMAIN SOUTH TO SOUTHWEST AS SYSTEM BEGINS TO OCCLUDE AND SHIFT TO THE
WEST EARLY SUNDAY. ETA HINTS AT POSSIBLE SEVERE TSTMS OVER NORTHEAST
TX INTO SOUTHWEST AR TONIGHT AS COLD POOL MOVES ACROSS. TO SAY THE
LEAST AN INTERESTING WEATHER DAY SHOULD UNFOLD. WILL NOT TO FAR FROM
QUIDANCE...BUT PROBABLY GO CLOSER TO FAN NUMBERS. TEMPS SHOULD NOT
WARM TO MUCH ON SUNDAY AS CAA IS UNDER WAY...COULD EVEN SEE SOME SNOW
OVER SOUTHEAST OK AND POSSIBLY INTO EXTREME NORTHEAST TX.

SHV 64/50/58/35  8630  MLU 68/52/60/35 8630  04

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, 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, 10:11 AM CSTSevere Thunderstorm WarningSHVShelby49 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.