Alert archive / Texas / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 166, NWS San Angelo, TX

September 21, 20014 counties in Texas

NWS San Angelo, TX issued this severe thunderstorm warning at Sep 21, 2001, 1:42 AM CDT for 4 counties in Texas. It was in force for 48 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: Sep 21, 2001, 1:42 AM CDT (06:42 UTC)
Expired: Sep 21, 2001, 2:30 AM CDT
In force: 48 min
Issued by: NWS San Angelo, TX
Area: Whole counties; the outline is the Mesonet’s reconstruction

Counties Coke County, TX, Nolan County, TX, Runnels County, TX, Taylor County, TX

The radar

The San Angelo radar (KSJT), 81 km from the middle of the area, began a volume at 06:44 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

Midland Regional, TX (KMAF), launched 00:00Z, 6.7 hours before the alert went out and 179 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: 1457 J/kg
Mixed-layer CIN: -29 J/kg
Mixed-layer LCL: 2502 m above ground
0-6 km bulk shear: 20 kt
0-1 km storm-relative helicity: 71 m²/s²
0-3 km storm-relative helicity: 165 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.2

Open this sounding in Storm Lab

The text

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

869 
WUUS54 KSJT 210643
SVRSJT
TXC081-353-399-441-210730-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SAN ANGELO TX
142 AM CDT FRI SEP 21 2001

THE NATIONAL WEATHER SERVICE IN SAN ANGELO HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  TAYLOR COUNTY IN NORTH CENTRAL TEXAS
  NOLAN COUNTY IN NORTHWEST TEXAS
  COKE COUNTY IN SOUTHWEST TEXAS
  RUNNELS COUNTY IN SOUTHWEST TEXAS

* UNTIL 230 AM CDT

* AT 134 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A 
  LINE OF SEVERE THUNDERSTORMS FROM MARYNEAL TO SANCO...MOVING       
  SOUTHEAST AT 30 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
   ROBERT LEE AT 145 AM CDT
   BLACKWELL AT 155 AM CDT
   HYLTON AT 200 AM CDT
   BRONTE AT 205 AM CDT
   WINGATE...MAVERICK AT 215 AM CDT

DAMAGING WINDS IN EXCESS OF 60 MPH AND VERY HEAVY RAIN ARE LIKELY. 
GO INSIDE A STURDY BUILDING AWAY FROOM CREEK BEDS AND FLOOD PRONE 
AREAS...AND STAY AWAY FROM WINDOWS.

LAT...LON 3226 10051 3183 10069 3181 10000 3227 9981

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 San Angelo, TX wrote its last area forecast discussion before this severe thunderstorm warning went out at Sep 20, 10:30 PM CDT, 3 hours 12 minutes earlier.

Area forecast discussion, Sep 20, 10:30 PM CDT, 3 hours 12 minutes before

WEST CENTRAL TEXAS FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN ANGELO TX
1030 PM CDT THU SEP 20 2001

THE LINE OF STRONGER THUNDERSTORMS HAVE MOVED EAST OF THE BIG COUNTRY
WITH WIDESPREAD SHOWERS OVER THE NRN/ERN BIG COUNTRY. SCATTERED
SHOWERS/TSTMS CONTINUE OVER THE WRN/SRN BIG COUNTRY...THE NERN
CONCHO VALLEY AND NRN HEARTLAND ZONES. HAVE UPDATED THE ZONES AS THE
SEVERE TSTM WATCH WAS CANCELLED. TWEAKED THE ZONES TO ACCOUNT FOR
EXPECTED PRECIPITATION/CLOUD TRENDS THE REST OF THE NIGHT AND FOR
EXPECTED AREAL RATHER THAN CHANCE COVERAGE OF SHOWERS/TSTMS.

.SJT...NONE.

22/RUBIN

In the hours before

Local storm report, Sep 20, 9:51 PM CDT, 3 hours 51 minutes before

LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SAN ANGELO TX
951 PM CDT THU SEP 20 2001

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

0734 PM    ROBY                      TX   65 MPH TSTM GUST
09/20/01   FISHER                         REPORTED BY LAW
                                          ENFORCEMENT

0807 PM    ROBY                      TX   62 MPH TSTM GUST
09/20/01   FISHER                         REPORTED BY WIND
                                          INSTRUMENT

0840 PM    3SW ABILENE               TX   WIND DAMAGE
09/20/01   TAYLOR                         LARGE TREE BLOWN DOWN

0842 PM    3N ABILENE                TX   73 MPH TSTM GUST
09/20/01   TAYLOR                         REPORTED BY WIND
                                          INSTRUMENT

Local storm report, Sep 20, 9:53 PM CDT, 3 hours 49 minutes before

LOCAL STORM REPORT...AMENDED
NATIONAL WEATHER SERVICE SAN ANGELO TX
953 PM CDT THU SEP 20 2001

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

0734 PM    ROBY                      TX   65 MPH TSTM GUST
09/20/01   FISHER                         REPORTED BY LAW
                                          ENFORCEMENT

0807 PM    ROBY                      TX   62 MPH TSTM GUST
09/20/01   FISHER                         REPORTED BY WIND
                                          INSTRUMENT

0825 PM    ANSON                     TX   WIND DAMAGE
09/20/01   JONES                          POWER LINES DOWN

0840 PM    3SW ABILENE               TX   WIND DAMAGE
09/20/01   TAYLOR                         LARGE TREE BLOWN DOWN

0842 PM    3N ABILENE                TX   73 MPH TSTM GUST
09/20/01   TAYLOR                         REPORTED BY WIND
                                          INSTRUMENT

Special weather statement, Sep 20, 10:01 PM CDT, 3 hours 41 minutes before

TXZ049-054-064>066-071-072-098-099-113-114-127-128-210400-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SAN ANGELO TX
1001 PM CDT THU SEP 20 2001

...SEVERE THUNDERSTORM WATCH 748 CANCELLED...

THE SEVERE WEATHER THREAT HAS DIMINISHED OVER WEST CENTRAL TEXAS.
THEREFORE...THE SEVERE THUNDERSTORM WATCH HAS BEEN CANCELLED.

14

The office that day

Everything else NWS San Angelo, TX issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Sep 20, 7:19 PM CDT	Severe Thunderstorm Warning	SJT	Haskell	71 min
Sep 20, 7:34 PM CDT	Severe Thunderstorm Warning	SJT	Fisher	56 min
Sep 20, 7:49 PM CDT	Severe Thunderstorm Warning	SJT	Throckmorton	71 min
Sep 20, 7:52 PM CDT	Severe Thunderstorm Warning	SJT	Nolan	68 min
Sep 20, 7:58 PM CDT	Severe Thunderstorm Warning	SJT	Jones	77 min
Sep 20, 8:35 PM CDT	Severe Thunderstorm Warning	SJT	Shackelford	70 min
Sep 20, 8:35 PM CDT	Severe Thunderstorm Warning	SJT	Taylor	70 min
Sep 20, 8:44 PM CDT	Severe Thunderstorm Warning	SJT	Callahan	76 min

Nearby

Severe Thunderstorm Warnings in Texas, 2001 Every 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.