Alert archive / Texas / Severe Thunderstorm Warnings in 1999

Severe Thunderstorm Warning 22, NWS Lubbock, TX

April 28, 1999Dickens County, Texas

NWS Lubbock, TX issued this severe thunderstorm warning at Apr 28, 1999, 7:29 PM CDT for Dickens County, Texas. It was in force for 51 min. 1 report 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
Apr 28, 1999, 7:29 PM CDT (00:29 UTC)
Expired
Apr 28, 1999, 8:20 PM CDT
In force
51 min
Issued by
NWS Lubbock, TX
Area
Whole counties

County Dickens County, TX

The radar

The Lubbock radar (KLBB), 96 km from the middle of the area, began a volume at 00:31 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.

What was reported inside it

TimeReportWhereRemark
Apr 28, 7:38 PM CDTHail 1Spur, TXQuarter size hail covered the ground.

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
Apr 28, 5:30 PM CDTSevere Thunderstorm WatchSPC6 hr

The nearest sounding before it

Amarillo Airport, TX (KAMA), launched 00:00Z, 0.5 hours before the alert went out and 198 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, Amarillo Airport, TX at 00:00Z on 1999-04-29Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 941 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, Amarillo Airport, TX at 00:00Z on 1999-04-29The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 60 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
941 J/kg
Mixed-layer CIN
-93 J/kg
Mixed-layer LCL
1298 m above ground
0-6 km bulk shear
36 kt
0-1 km storm-relative helicity
60 m²/s²
0-3 km storm-relative helicity
162 m²/s²
Significant tornado parameter
0.1
Supercell composite
1.5

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 Lubbock, TX issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Apr 28, 7:22 PM CDTFlash Flood WarningLUBCastro2 hr
Apr 28, 8:20 PM CDTSevere Thunderstorm WarningLUBDickens45 min
Apr 28, 8:20 PM CDTSevere Thunderstorm WarningLUBFloyd, Hale40 min
Apr 28, 9:04 PM CDTSevere Thunderstorm WarningLUBMotley46 min
Apr 28, 9:26 PM CDTTornado WarningLUBFloyd, Motley34 min
Apr 28, 10:00 PM CDTSevere Thunderstorm WarningLUBBriscoe, Hall, Motley50 min
Apr 28, 10:34 PM CDTSevere Thunderstorm WarningLUBDickens46 min
Apr 28, 11:46 PM CDTFlash Flood WarningLUBCastro3 hr
Apr 29, 12:04 AM CDTFlash Flood WarningLUBDickens, Motley4 hr
Apr 29, 3:21 AM CDTFlash Flood WarningLUBHale, Lubbock3 hr
Apr 29, 4:40 AM CDTSevere Thunderstorm WarningLUBCrosby35 min
Apr 29, 5:16 AM CDTSevere Thunderstorm WarningLUBHale49 min
Apr 29, 5:21 AM CDTSevere Thunderstorm WarningLUBDickens, Kent49 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; radar from the NEXRAD Level II archive.