Alert archive / Texas / Severe Thunderstorm Warnings in 1999

Severe Thunderstorm Warning 306, NWS Shreveport, LA

May 31, 1999Camp County, Texas

NWS Shreveport, LA issued this severe thunderstorm warning at May 31, 1999, 10:57 AM CDT for Camp County, Texas. It was in force for 58 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 31, 1999, 10:57 AM CDT (15:57 UTC)
Expired
May 31, 1999, 11:55 AM CDT
In force
58 min
Issued by
NWS Shreveport, LA
Area
Whole counties

County Camp County, TX

The watch it was issued in

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

IssuedProductOfficeLasted
May 31, 10:45 AM CDTSevere Thunderstorm WatchSPC4 hr

The nearest sounding before it

Norman, OK (KOUN), launched 12:00Z, 4.0 hours before the alert went out and 335 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, Norman, OK at 12:00Z on 1999-05-31Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2542 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, Norman, OK at 12:00Z on 1999-05-31The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 261 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
2542 J/kg
Mixed-layer CIN
-172 J/kg
Mixed-layer LCL
1018 m above ground
0-6 km bulk shear
36 kt
0-1 km storm-relative helicity
261 m²/s²
0-3 km storm-relative helicity
313 m²/s²
Significant tornado parameter
0.0
Supercell composite
4.1

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 31, 9:43 AM CDTSevere Thunderstorm WarningSHVRed River62 min
May 31, 10:36 AM CDTSevere Thunderstorm WarningSHVFranklin, Titus49 min
May 31, 10:36 AM CDTSevere Thunderstorm WarningSHVBowie49 min
May 31, 10:57 AM CDTSevere Thunderstorm WarningSHVCass, Morris58 min
May 31, 11:12 AM CDTSevere Thunderstorm WarningSHVWood58 min
May 31, 3:35 PM CDTSevere Thunderstorm WarningSHVGrant55 min

Nearby

Severe Thunderstorm Warnings in Texas, 1999Every severe thunderstorm warning in 1999

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.