Alert archive / Texas / Severe Thunderstorm Warnings in 1999

Severe Thunderstorm Warning 22, NWS Brownsville, TX

May 17, 1999Cameron County, Hidalgo County, Texas

NWS Brownsville, TX issued this severe thunderstorm warning at May 17, 1999, 10:32 PM CDT for Cameron County, Hidalgo County, Texas. It was in force for 18 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 17, 1999, 10:32 PM CDT (03:32 UTC)
Expired
May 17, 1999, 10:50 PM CDT
In force
18 min
Issued by
NWS Brownsville, TX
Area
Whole counties

Counties Cameron County, TX, Hidalgo County, TX

The nearest sounding before it

Corpus Christi, TX (KCRP), launched 00:00Z, 3.5 hours before the alert went out and 169 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, Corpus Christi, TX at 00:00Z on 1999-05-18Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 3161 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, Corpus Christi, TX at 00:00Z on 1999-05-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 63 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
3161 J/kg
Mixed-layer CIN
-57 J/kg
Mixed-layer LCL
707 m above ground
0-6 km bulk shear
37 kt
0-1 km storm-relative helicity
63 m²/s²
0-3 km storm-relative helicity
149 m²/s²
Significant tornado parameter
0.8
Supercell composite
4.3

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.

The office that day

Everything else NWS Brownsville, TX issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 18, 3:38 AM CDTSevere Thunderstorm WarningBROBrooks, Jim Hogg67 min
May 18, 4:35 AM CDTSevere Thunderstorm WarningBROHidalgo, Kenedy, Willacy75 min
May 18, 4:35 AM CDTSevere Thunderstorm WarningBROStarr75 min
May 18, 5:54 AM CDTSevere Thunderstorm WarningBROCameron, Hidalgo66 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.