Alert archive / Texas / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 151, NWS San Angelo, TX

September 18, 2001Concho County, Texas

NWS San Angelo, TX issued this severe thunderstorm warning at Sep 18, 2001, 8:04 PM CDT for Concho County, Texas. It was in force for 56 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 18, 2001, 8:04 PM CDT (01:04 UTC)
Expired: Sep 18, 2001, 9:00 PM CDT
In force: 56 min
Issued by: NWS San Angelo, TX
Area: Whole counties; the outline is the Mesonet’s reconstruction

County Concho County, TX

The radar

The San Angelo radar (KSJT), 61 km from the middle of the area, began a volume at 01:05 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, 1.1 hours before the alert went out and 228 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: 538 J/kg
Mixed-layer CIN: -2 J/kg
Mixed-layer LCL: 2646 m above ground
0-6 km bulk shear: 32 kt
0-1 km storm-relative helicity: -10 m²/s²
0-3 km storm-relative helicity: 52 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

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

242 
WUUS54 KSJT 190104
SVRSJT
TXC095-190200-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SAN ANGELO TX
804 PM CDT TUE SEP 18 2001

THE NATIONAL WEATHER SERVICE IN SAN ANGELO HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CONCHO COUNTY IN WEST CENTRAL TEXAS

* UNTIL 900 PM CDT

* AT 804 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 11 MILES NORTH OF EOLA...OR ABOUT 12 MILES WEST
  OF PAINT ROCK...MOVING SOUTHEAST AT 25 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
   EOLA...PAINT ROCK AT 825 PM CDT
   MILLERSVIEW AT 855 PM CDT

LAT...LON 3156 9974 3156 10010 3131 10010 3132 9962

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 18, 6:17 PM CDT, 1 hour 47 minutes earlier.

Area forecast discussion, Sep 18, 6:17 PM CDT, 1 hour 47 minutes before

WEST CENTRAL TEXAS FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN ANGELO TX
617 PM CDT TUE SEP 18 2001

QUICK ZONE UPDATE TO ACCOUNT FOR ONGOING CONVECTION. INCREASED POPS
SLIGHTLY ACROSS THE CONCHO VALLEY AND ADDED POPS TO THE NORTHERN
EDWARDS PLATEAU.

07

In the hours before

Special weather statement, Sep 18, 2:10 PM CDT, 5 hours 54 minutes before

TXZ049-054-064>066-071>073-076>078-098-099-113-114-127-128-139-140-
154-155-168>170-182230-

WEST CENTRAL TEXAS HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE SAN ANGELO TX
210 PM CDT TUE SEP 18 2001

...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS OVER EASTERN
PORTIONS OF BIG COUNTRY THIS EVENING...

A COLD FRONT OVER THE NORTHWEST BIG COUNTRY AT MID AFTERNOON WILL MOVE
SOUTH INTO THE CONCHO VALLEY BY WEDNESDAY MORNING. THE ATMOSPHERE WILL
BE SLIGHTLY UNSTABLE AHEAD OF THE COLD FRONT THIS EVENING. AS AN UPPER
LEVEL DISTURBANCE CROSSES THE TEXAS PANHANDLE THIS EVENING...ISOLATED
SHOWERS AND THUNDERSTORMS ARE EXPECTED TO FORM NEAR THE COLD FRONT.
INSTABILITY AND WIND SHEAR WILL BE SUFFICIENT THIS EVENING TO SUPPORT
SEVERE THUNDERSTORM DEVELOPMENT OVER THE EASTERN BIG COUNTRY...
INCLUDING THE ABILENE AREA. THE SEVERE WEATHER THREAT SHOULD DIMINISH
BY MIDNIGHT...AS THE ATMOSPHERE BECOMES MORE STABLE.

SPOTTER ACTIVATION MAY BE REQUIRED THIS EVENING OVER THE EASTERN BIG
COUNTRY.

FOR THE SOUTHWEST TEXAS AND SOUTHEAST NEW MEXICO OUTLOOK SEE PRODUCT
LBBSPSMAF. FOR THE SOUTH PLAINS OUTLOOK SEE PRODUCT LBBSPSLBB. FOR
THE CENTRAL OKLAHOMA OUTLOOK SEE PRODUCT OKCSPSOKC. FOR THE NORTH
TEXAS OUTLOOK SEE PRODUCT FTWSPSFTW. FOR THE SOUTH CENTRAL TEXAS
OUTLOOK SEE PRODUCT SATSPSSAT.

14

Local storm report, Sep 18, 7:07 PM CDT, 57 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SAN ANGELO, TX
707 PM CDT TUE SEP 18 2001

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

0630 PM    2 E BLACKWELL             TX   1.75 INCH HAIL
09/18/01   NOLAN

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 18, 7:18 PM CDT	Severe Thunderstorm Warning	SJT	Runnels	57 min
Sep 18, 7:34 PM CDT	Severe Thunderstorm Warning	SJT	Taylor	56 min
Sep 18, 7:54 PM CDT	Severe Thunderstorm Warning	SJT	Tom Green	66 min
Sep 18, 8:18 PM CDT	Severe Thunderstorm Warning	SJT	Brown	57 min
Sep 18, 8:58 PM CDT	Severe Thunderstorm Warning	SJT	Concho	62 min
Sep 18, 9:18 PM CDT	Severe Thunderstorm Warning	SJT	Brown	57 min
Sep 18, 10:43 PM CDT	Severe Thunderstorm Warning	SJT	Tom Green	62 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.