Alert archive / Texas / Severe Thunderstorm Warnings in 1999

Severe Thunderstorm Warning 91, NWS Amarillo, TX

June 4, 1999Hartley County, Texas

NWS Amarillo, TX issued this severe thunderstorm warning at Jun 4, 1999, 9:29 PM CDT for Hartley County, Texas. It was in force for 31 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
Jun 4, 1999, 9:29 PM CDT (02:29 UTC)
Expired
Jun 4, 1999, 10:00 PM CDT
In force
31 min
Issued by
NWS Amarillo, TX
Area
Whole counties

County Hartley County, TX

The nearest sounding before it

Dodge City, (KDDC), launched 00:00Z, 2.5 hours before the alert went out and 322 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, Dodge City, at 00:00Z on 1999-06-05Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 3659 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, Dodge City, at 00:00Z on 1999-06-05The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 55 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
3659 J/kg
Mixed-layer CIN
-100 J/kg
Mixed-layer LCL
1169 m above ground
0-6 km bulk shear
28 kt
0-1 km storm-relative helicity
55 m²/s²
0-3 km storm-relative helicity
116 m²/s²
Significant tornado parameter
0.4
Supercell composite
3.1

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 Amarillo, TX issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jun 4, 9:38 PM CDTSevere Thunderstorm WarningAMAOldham37 min
Jun 4, 7:07 PM CDTSevere Thunderstorm WarningAMACimarron23 min
Jun 4, 8:01 PM CDTSevere Thunderstorm WarningAMATexas29 min
Jun 4, 8:41 PM CDTSevere Thunderstorm WarningAMATexas34 min
Jun 4, 9:34 PM CDTTornado WarningAMATexas26 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.