Alert archive / Texas / Severe Thunderstorm Warnings in 1999

Severe Thunderstorm Warning 263, NWS Shreveport, LA

May 17, 1999Smith County, Texas

NWS Shreveport, LA issued this severe thunderstorm warning at May 17, 1999, 6:26 PM CDT for Smith County, Texas. It was in force for 59 min. 6 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 17, 1999, 6:26 PM CDT (23:26 UTC)
Expired
May 17, 1999, 7:25 PM CDT
In force
59 min
Issued by
NWS Shreveport, LA
Area
Whole counties

County Smith County, TX

What was reported inside it

TimeReportWhereRemark
May 17, 6:40 PM CDTThunderstorm Wind 60Tyler, TX
May 17, 6:45 PM CDTThunderstorm Wind 65Tyler, TXSeveral large trees down including one across a home and another across a suburban on the southwest side of town.
May 17, 6:55 PM CDTThunderstorm Wind 62Swan, TXWinds recorded by trained spotter.
May 17, 6:55 PM CDTHail 1.75Lindale, TX
May 17, 6:55 PM CDTThunderstorm Wind 60Lindale, TX
May 17, 7:05 PM CDTHail 1Whitehouse, TX

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.

The watch it was issued in

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

IssuedProductOfficeLasted
May 17, 3:30 PM CDTSevere Thunderstorm WatchSPC6 hr

The nearest sounding before it

Fort Worth, TX (KFWD), launched 12:00Z, 11.4 hours before the alert went out and 196 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 12:00Z on 1999-05-17Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1514 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, Fort Worth, TX at 12:00Z on 1999-05-17The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 291 square meters per square second.19395878Sfc1 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
1514 J/kg
Mixed-layer CIN
-170 J/kg
Mixed-layer LCL
643 m above ground
0-6 km bulk shear
43 kt
0-1 km storm-relative helicity
291 m²/s²
0-3 km storm-relative helicity
346 m²/s²
Significant tornado parameter
0.5
Supercell composite
5.7

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 17, 2:57 PM CDTSevere Thunderstorm WarningSHVRed River63 min
May 17, 3:44 PM CDTSevere Thunderstorm WarningSHVFranklin51 min
May 17, 4:40 PM CDTFlash Flood WarningSHVFranklin, Titus4 hr
May 17, 4:48 PM CDTSevere Thunderstorm WarningSHVWood32 min
May 17, 6:18 PM CDTSevere Thunderstorm WarningSHVWood62 min
May 17, 6:43 PM CDTSevere Thunderstorm WarningSHVCass47 min
May 17, 6:56 PM CDTSevere Thunderstorm WarningSHVGregg, Upshur64 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.