Alert archive / Texas / Tornado Watches in 1999

Tornado Watch 654

August 23, 199918 counties in Texas

The Storm Prediction Center issued this tornado watch at Aug 23, 1999, 2:00 AM CDT for 18 counties in Texas. It was in force for 14 hr.

The area

The outline as issued.

The facts

Issued
Aug 23, 1999, 2:00 AM CDT (07:00 UTC)
Expired
Aug 23, 1999, 4:00 PM CDT
In force
14 hr
Issued by
the Storm Prediction Center

Counties Aransas County, TX, Atascosa County, TX, Bee County, TX, Brooks County, TX, Duval County, TX, Frio County, TX, Goliad County, TX, Jim Hogg County, TX, Jim Wells County, TX, Kenedy County, TX, Kleberg County, TX, La Salle County, TX, Live Oak County, TX, McMullen County, TX, Nueces County, TX, Refugio County, TX, San Patricio County, TX, Webb County, TX

The radar

The Corpus Christi radar (KCRP), 86 km from the middle of the area, began a volume at 07:04 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.

Warnings issued inside it

13 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.

IssuedProductOfficeCountiesLasted
Aug 23, 4:18 AM CDTFlash Flood WarningBROBrooks, Kenedy8 hr
Aug 23, 6:15 AM CDTFlash Flood WarningCRPAransas, San Patricio2 hr
Aug 23, 6:15 AM CDTFlash Flood WarningCRPNueces2 hr
Aug 23, 7:15 AM CDTFlash Flood WarningCRPRefugio4 hr
Aug 23, 7:22 AM CDTFlash Flood WarningEWXAtascosa, Frio5 hr
Aug 23, 7:41 AM CDTFlash Flood WarningCRPBee, Live Oak4 hr
Aug 23, 8:06 AM CDTFlash Flood WarningCRPAransas, Nueces, San Patricio3 hr
Aug 23, 12:30 PM CDTFlash Flood WarningEWXAtascosa, Frio4 hr
Aug 23, 1:30 PM CDTFlash Flood WarningCRPAransas, Bee, Jim Wells, Live Oak, Nueces, Refugio and 1 more4 hr
Aug 23, 1:30 PM CDTFlash Flood WarningCRPKleberg4 hr
Aug 23, 2:47 PM CDTTornado WarningCRPNueces43 min
Aug 23, 2:59 PM CDTTornado WarningBROKenedy, Willacy31 min
Aug 23, 3:34 PM CDTTornado WarningBROKenedy41 min

The nearest sounding before it

Corpus Christi, TX (KCRP), launched 00:00Z, 7.0 hours before the alert went out and 104 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 1999-08-23Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 375 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 1999-08-23The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 229 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
375 J/kg
Mixed-layer CIN
-1 J/kg
Mixed-layer LCL
515 m above ground
0-6 km bulk shear
37 kt
0-1 km storm-relative helicity
229 m²/s²
0-3 km storm-relative helicity
235 m²/s²
Significant tornado parameter
0.4
Supercell composite
2.2

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.

Nearby

Tornado Watches in Texas, 1999Every tornado watch 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; radar from the NEXRAD Level II archive.