Alert archive / Texas / Severe Thunderstorm Watches in 2001

Severe Thunderstorm Watch 196

May 4, 200113 counties in Texas

The Storm Prediction Center issued this severe thunderstorm watch at May 4, 2001, 9:00 PM CDT for 13 counties in Texas. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued
May 4, 2001, 9:00 PM CDT (02:00 UTC)
Expired
May 4, 2001, 11:00 PM CDT
In force
2 hr
Issued by
the Storm Prediction Center

Counties Atascosa County, TX, Bandera County, TX, Bexar County, TX, Caldwell County, TX, Comal County, TX, Dimmit County, TX, Frio County, TX, Guadalupe County, TX, La Salle County, TX, McMullen County, TX, Medina County, TX, Wilson County, TX, Zavala County, TX

The radar

The Laughlin AFB radar (KDFX), 111 km from the middle of the area, began a volume at 02:03 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

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

IssuedProductOfficeCountiesLasted
May 4, 10:14 PM CDTTornado WarningEWXFrio46 min

The nearest sounding before it

Del Rio, TX (KDRT), launched 00:00Z, 2.0 hours before the alert went out and 164 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, Del Rio, TX at 00:00Z on 2001-05-05Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 73 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, Del Rio, TX at 00:00Z on 2001-05-05The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 164 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
73 J/kg
Mixed-layer CIN
-35 J/kg
Mixed-layer LCL
906 m above ground
0-6 km bulk shear
57 kt
0-1 km storm-relative helicity
164 m²/s²
0-3 km storm-relative helicity
190 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.2

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.

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 4, 7:00 PM CDTTornado WatchSPCBosque, Clay, Collin, Comanche, Cooke, Dallas and 14 more4 hr
May 4, 8:00 PM CDTSevere Thunderstorm WatchSPCBell, Blanco, Burnet, Coryell, Falls, Hamilton and 6 more3 hr
May 5, 2:30 PM CDTSevere Thunderstorm WatchSPCBell, Blanco, Bosque, Brazos, Brown, Burleson and 28 more6 hr
May 5, 3:15 PM CDTTornado WatchSPCArcher, Baylor, Clay, Foard, Hardeman, King and 3 more6 hr

Nearby

Severe Thunderstorm Watches in Texas, 2001Every severe thunderstorm watch in 2001

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.