Alert archive / Texas / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 59, NWS Austin/San Antonio, TX

May 5, 2001Maverick County, Texas

NWS Austin/San Antonio, TX issued this severe thunderstorm warning at May 5, 2001, 11:10 PM CDT for Maverick County, Texas. It was in force for 50 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline the Iowa Environmental Mesonet reconstructed for it; the warning itself named whole counties.

The facts

Issued
May 5, 2001, 11:10 PM CDT (04:10 UTC)
Expired
May 6, 2001, 12:00 AM CDT
In force
50 min
Issued by
NWS Austin/San Antonio, TX
Area
Whole counties; the outline is the Mesonet’s reconstruction

County Maverick County, TX

The radar

The Laughlin AFB radar (KDFX), 83 km from the middle of the area, began a volume at 04:14 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.

The nearest sounding before it

Del Rio, TX (KDRT), launched 00:00Z, 4.2 hours before the alert went out and 106 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 2001-05-06Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2880 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 2001-05-06The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 106 square meters per square second.1939587897Sfc1 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
2880 J/kg
Mixed-layer CIN
-3 J/kg
Mixed-layer LCL
898 m above ground
0-6 km bulk shear
49 kt
0-1 km storm-relative helicity
106 m²/s²
0-3 km storm-relative helicity
186 m²/s²
Significant tornado parameter
2.7
Supercell composite
11.2

Open this sounding in Storm Lab

The text

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

000 
WUUS54 KEWX 060408
SVRSAT

TXC323-060500-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
1110 PM CDT SAT MAY 5 2001

THE NATIONAL WEATHER SERVICE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR THE FOLLOWING COUNTIES IN TEXAS...
  MAVERICK

* UNTIL MIDNIGHT CDT

* AT 1106 PM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A   
SEVERE THUNDERSTORM 5 MILES WEST OF EL INDIO...MOVING SOUTHEAST AT 
25 MPH.

SEVERE THUNDERSTORMS CAN PRODUCE TORNADOES WITH LITTLE OR NO ADVANCE 
WARNING. VERY LARGE HAIL OF TWO TO THREE INCHES IS POSSIBLE WITH 
THIS SEVERE THUNDERSTORM. 

LAT...LON 2845 10045 2820 10014 2878 10014 2876 10052

W

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Austin/San Antonio, TX wrote its last area forecast discussion before this severe thunderstorm warning went out at May 5, 2:40 PM CDT, 8 hours 30 minutes earlier.

Area forecast discussion, May 5, 2:40 PM CDT, 8 hours 30 minutes before
SOUTH CENTRAL TEXAS FORECAST DISCUSSION...UPDATED
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
240 PM CDT SAT MAY 5 2001

SHOWERS/TSTMS MOVG NWD INTO THE CWA THIS AFTN ALONG LAST NIGHTS OLD
BOUNDARY WITH JUICY 70-75 DEGREE DEW PTS FEEDING INTO THESE STORMS.
SINCE THESE STORMS PARTIALLY THERMALLY DRIVEN...EXPECT A DECREASE IN
THE LATE EVENING HOURS.  HOWEVER DYNAMICALLY DRIVEN STORMS OVER
CENTRAL TX FROM A S/W ENERGY KICKING OUT OF NM INTO N TX THIS AFTN
AND EVENING WILL SKIRT THE NRN CWA WITH THE POTENTIAL FOR STORMS TO
CONT THRU LATE TONIGHT INTO THE ERN CWA.  DURATION OF CONVECTION
TONIGHT AND A SOAKED GROUND WILL PROMPT THE NEED FOR AN FFA FOR MUCH
OF THE NRN AND ERN CWA OVERNIGHT...ALONG WITH THE MENTION OF SVR
MAINLY NRN CWA ON THE TAIL END OF S/W AND A STALLING DRY LINE.

BEYOND TONIGHT...AN UPR TROF OVER THE CENTRAL U.S. DOWN TO TX TO
MOVE SLOWLY EWD WITH A FRONTAL BOUNDARY INTO OR JUST NORTH OF THE
CWA...SO WILL KEEP THE CHC RW/TRW DUE TO LOWER LEVELS REMAINING
MOIST AND S/WS DROPPING SEWD IN THE NLY FLOW ALOFT.

PRELIMINARY NUMBERS...
AUS 068/084/066/081 6533
DRT 066/089/067/086 3212
SAT 067/085/068/082 6533

.EWX...FFA FOR ALL BUT THE SWRN CWA THRU TONIGHT.

1/16

In the hours before

Local storm report, May 5, 8:02 PM CDT, 3 hours 8 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO, TX
802 PM CDT SAT MAY 5 2001

TIME(CDT)  .....CITY LOCATION.....STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

1105 PM    MONTELL                   TX   FLASH FLOODS
05/04/01   UVALDE                         HIGHWAY 55 AT MONTELL
                                          CLOSED. STILL CLOSED AT
                                          05/05/01 1730. REPORTED BY
                                          LAW ENFORCEMENT

1105 PM    UVALDE                    TX   FLASH FLOODS
05/04/01   UVALDE                         WATER OVER THE ROAD ON
                                          COUNTY ROADS 416 AND 414.
                                          WATER OVER THE ROAD ON FM
                                          1051 AND 2090. WATER STILL
                                          OVER THE ROAD AT 05/05/01
                                          530 PM. REPORTED BY LAW
                                          ENFORCEMENT

0345 PM    KENEDY                    TX   FLASH FLOODS 05/05/01
           KARNES                         HIGHWAY 72E AND 72W
                                          CLOSED BETWEEN KENEDY
                                          AND RUNGE. REPORTED BY
                                          LAW ENFORCEMENT

0430 PM    YOAKUM                    TX   FLASH FLOODS
05/05/01   LAVACA                         6 1/2 INCHES OF RAIN IN 2
                                          1/2 HOURS AT JCT HIGHWAY
                                          77N AND 111S. WATER OVER
                                          THE ROAD. REPORTED BY CO-OP
                                          OBSERVER

0430 PM    YOAKUM                    TX   FLASH FLOODS
05/05/01   LAVACA                         COUNTY ROADS 436, 441, 444
                                          CLOSED. REPORTED BY LAW
                                          ENFORCEMENT

0530 PM    LEAKEY                    TX   FLASH FLOODS
05/05/01   REAL                           LOWER FM 1120
                                          CLOSED. REPORTED BY LAW
                                          ENFORCEMENT

0622 PM    TERRYVILLE                TX   FLASH FLOODS
05/05/01   DEWITT                         HIGHWAY 682 CLOSED FROM
                                          1447 TO 77. REPORTED BY LAW
                                          ENFORCEMENT

DC
Local storm report, May 5, 10:50 PM CDT, 20 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO, TX
1050 PM CDT SAT MAY 5 2001

TIME(CDT)  .....CITY LOCATION.....STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0850 PM    EL INDIO                  TX   TORNADO
05/05/01   MAVERICK                       REPORTED BY LAW
                                          ENFORCEMENT

0853 PM    EL INDIO                  TX   1.75 INCH HAIL
05/05/01   MAVERICK                       REPORTED BY LAW
                                          ENFORCEMENT
DC

The office that day

Everything else NWS Austin/San Antonio, TX issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 5, 8:20 PM CDTTornado WarningEWXMaverick60 min
May 5, 9:18 PM CDTTornado WarningEWXDimmit, Maverick57 min
May 5, 10:12 PM CDTTornado WarningEWXDimmit48 min
May 5, 11:53 PM CDTTornado WarningEWXDimmit52 min
May 6, 5:05 PM CDTSevere Thunderstorm WarningEWXLlano30 min
May 6, 5:39 PM CDTSevere Thunderstorm WarningEWXLlano51 min
May 6, 5:48 PM CDTSevere Thunderstorm WarningEWXAtascosa, Frio57 min
May 6, 6:00 PM CDTTornado WarningEWXLlano45 min
May 6, 6:40 PM CDTSevere Thunderstorm WarningEWXBurnet65 min

Nearby

Severe Thunderstorm Warnings in Texas, 2001Every severe thunderstorm warning 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.