Alert archive / Texas / Severe Thunderstorm Warnings in 1999

Severe Thunderstorm Warning 182, NWS Fort Worth, TX

May 11, 1999Collin County, Texas

NWS Fort Worth, TX issued this severe thunderstorm warning at May 11, 1999, 9:51 PM CDT for Collin County, Texas. It was in force for 54 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 11, 1999, 9:51 PM CDT (02:51 UTC)
Expired
May 11, 1999, 10:45 PM CDT
In force
54 min
Issued by
NWS Fort Worth, TX
Area
Whole counties; the outline is the Mesonet’s reconstruction

County Collin County, TX

The watch it was issued in

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

IssuedProductOfficeLasted
May 11, 5:45 PM CDTTornado WatchSPC4 hr
May 11, 9:15 PM CDTSevere Thunderstorm WatchSPC4 hr

The nearest sounding before it

Fort Worth, TX (KFWD), launched 00:00Z, 2.9 hours before the alert went out and 78 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 00:00Z on 1999-05-12Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2666 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 00:00Z on 1999-05-12The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 31 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
2666 J/kg
Mixed-layer CIN
-27 J/kg
Mixed-layer LCL
881 m above ground
0-6 km bulk shear
35 kt
0-1 km storm-relative helicity
31 m²/s²
0-3 km storm-relative helicity
86 m²/s²
Significant tornado parameter
0.7
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 Fort Worth, TX issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 11, 7:06 PM CDTSevere Thunderstorm WarningFWDEastland54 min
May 11, 7:13 PM CDTFlash Flood WarningFWDEastland, Erath, Palo Pinto3 hr
May 11, 7:23 PM CDTSevere Thunderstorm WarningFWDPalo Pinto67 min
May 11, 7:28 PM CDTSevere Thunderstorm WarningFWDCoryell42 min
May 11, 7:34 PM CDTSevere Thunderstorm WarningFWDMcLennan56 min
May 11, 7:39 PM CDTSevere Thunderstorm WarningFWDParker66 min
May 11, 7:55 PM CDTSevere Thunderstorm WarningFWDJack, Wise65 min
May 11, 8:12 PM CDTSevere Thunderstorm WarningFWDErath63 min
May 11, 8:17 PM CDTSevere Thunderstorm WarningFWDNavarro58 min
May 11, 8:20 PM CDTSevere Thunderstorm WarningFWDTarrant55 min
May 11, 8:38 PM CDTSevere Thunderstorm WarningFWDFreestone67 min
May 11, 8:41 PM CDTSevere Thunderstorm WarningFWDDallas, Ellis, Kaufman49 min
May 11, 8:41 PM CDTSevere Thunderstorm WarningFWDGrayson64 min
May 11, 8:53 PM CDTSevere Thunderstorm WarningFWDWise37 min
May 11, 8:55 PM CDTSevere Thunderstorm WarningFWDDenton65 min
May 11, 9:15 PM CDTSevere Thunderstorm WarningFWDAnderson, Henderson, Navarro60 min
May 11, 9:19 PM CDTSevere Thunderstorm WarningFWDErath, Hood56 min
May 11, 9:27 PM CDTSevere Thunderstorm WarningFWDDelta, Lamar63 min
May 11, 9:31 PM CDTSevere Thunderstorm WarningFWDLeon59 min
May 11, 9:41 PM CDTSevere Thunderstorm WarningFWDMilam64 min
May 11, 9:55 PM CDTSevere Thunderstorm WarningFWDKaufman, Van Zandt65 min
May 11, 10:22 PM CDTSevere Thunderstorm WarningFWDHunt53 min
May 11, 10:32 PM CDTSevere Thunderstorm WarningFWDAnderson58 min
May 11, 10:36 PM CDTSevere Thunderstorm WarningFWDLeon54 min
May 11, 10:40 PM CDTSevere Thunderstorm WarningFWDFannin65 min
May 11, 11:04 PM CDTSevere Thunderstorm WarningFWDHopkins56 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.