Alert archive / Texas / Tornado Watches in 2001

Tornado Watch 192

May 4, 200121 counties in Texas

The Storm Prediction Center issued this tornado watch at May 4, 2001, 4:30 PM CDT for 21 counties in Texas. It was in force for 5 hr.

The area

The outline as issued.

The facts

Issued: May 4, 2001, 4:30 PM CDT (21:30 UTC)
Expired: May 4, 2001, 9:00 PM CDT
In force: 5 hr
Issued by: the Storm Prediction Center

All 21 counties

Bandera County, TX, Brown County, TX, Concho County, TX, Dimmit County, TX, Edwards County, TX, Gillespie County, TX, Kerr County, TX, Kimble County, TX, Kinney County, TX, Llano County, TX, Mason County, TX, Maverick County, TX, McCulloch County, TX, Medina County, TX, Menard County, TX, Mills County, TX, Real County, TX, San Saba County, TX, Sutton County, TX, Uvalde County, TX, Zavala County, TX

The radar

The Laughlin AFB radar (KDFX), 46 km from the middle of the area, began a volume at 21:31 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

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

Issued	Product	Office	Counties	Lasted
May 4, 5:30 PM CDT	Flash Flood Warning	EWX	Edwards	3 hr
May 4, 5:35 PM CDT	Severe Thunderstorm Warning	SJT	McCulloch	40 min
May 4, 5:58 PM CDT	Severe Thunderstorm Warning	EWX	Kinney, Val Verde	62 min
May 4, 6:41 PM CDT	Tornado Warning	EWX	Kinney	64 min
May 4, 6:42 PM CDT	Flash Flood Warning	EWX	Kinney	2 hr
May 4, 6:42 PM CDT	Severe Thunderstorm Warning	FWD	Mills	63 min
May 4, 7:12 PM CDT	Severe Thunderstorm Warning	EWX	Maverick	63 min
May 4, 7:35 PM CDT	Tornado Warning	EWX	Maverick	40 min
May 4, 7:54 PM CDT	Severe Thunderstorm Warning	EWX	Bandera, Real	66 min
May 4, 8:06 PM CDT	Flash Flood Warning	EWX	Bandera, Uvalde	114 min
May 4, 8:15 PM CDT	Severe Thunderstorm Warning	EWX	Dimmit, Zavala	60 min

The nearest sounding before it

Del Rio, TX (KDRT), launched 12:00Z, 9.5 hours before the alert went out and 79 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 947 J/kg
Mixed-layer CIN: 0 J/kg
Mixed-layer LCL: 590 m above ground
0-6 km bulk shear: 38 kt
0-1 km storm-relative helicity: 232 m²/s²
0-3 km storm-relative helicity: 318 m²/s²
Significant tornado parameter: 1.3
Supercell composite: 11.5

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
WWUS9 KMKC 042132
SEL2  

SEL2  
MKC WW 042127
TXZ000-050200-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 192
STORM PREDICTION CENTER NORMAN OK
427 PM CDT FRI MAY 4 2001

THE STORM PREDICTION CENTER HAS ISSUED A
TORNADO WATCH FOR PORTIONS OF

   SOUTH TEXAS                              

EFFECTIVE THIS FRIDAY AFTERNOON AND EVENING FROM 430 PM UNTIL 900
PM CDT.

TORNADOES...HAIL TO 3 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS
TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.

THE TORNADO WATCH AREA IS ALONG AND 60 STATUTE MILES EAST AND WEST
OF A LINE FROM 85 MILES SOUTH SOUTHEAST OF DEL RIO TEXAS TO 95
MILES NORTH NORTHEAST OF JUNCTION TEXAS.

REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR
TORNADOES AND SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH AREA. 
PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR THREATENING
WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS AND POSSIBLE
WARNINGS.

OTHER WATCH INFORMATION...  CONTINUE...WW 191...

DISCUSSION...THUNDERSTORMS DEVELOPING ALONG NNE/SSW-ORIENTED
CONVERGENCE LINE EXPECTED TO INCREASE IN INTENSITY LATER THIS
AFTERNOON AND EVENING AS REGION CONTINUES TO DESTABILIZE IN
RESPONSE TO BOTH SURFACE HEATING AND CONTINUED EWD MOTION OF UPPER
SHORTWAVE TROUGH /PER W.V. IMAGERY AND PROFILERS/.  DEEP LAYER
SHEAR SHOULD ALSO INCREASE OVER REGION AS MID/UPPER LEVEL FLOW
BECOMES MORE WSWLY AT 50-60 KTS.

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 3 INCHES.  EXTREME TURBULENCE AND SURFACE WIND
GUSTS TO 60 KNOTS.  A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 550. 
MEAN STORM MOTION VECTOR 24035.

...CORFIDI

;314,098?0 281,0992 281,1012 314,1001;

SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 4, 2:00 PM CDT	Tornado Watch	SPC	Archer, Baylor, Brown, Callahan, Clay, Coke and 16 more	6 hr

Nearby

Tornado Watches in Texas, 2001 Every tornado 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.