Alert archive / Texas / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 69, NWS San Angelo, TX

April 23, 2001Mason County, Texas

NWS San Angelo, TX issued this severe thunderstorm warning at Apr 23, 2001, 12:55 AM CDT for Mason 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: Apr 23, 2001, 12:55 AM CDT (05:55 UTC)
Expired: Apr 23, 2001, 1:45 AM CDT
In force: 50 min
Issued by: NWS San Angelo, TX
Area: Whole counties; the outline is the Mesonet’s reconstruction

County Mason County, TX

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Apr 22, 11:45 PM CDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Del Rio, TX (KDRT), launched 00:00Z, 5.9 hours before the alert went out and 220 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: 1796 J/kg
Mixed-layer CIN: -32 J/kg
Mixed-layer LCL: 2172 m above ground
0-6 km bulk shear: 43 kt
0-1 km storm-relative helicity: 6 m²/s²
0-3 km storm-relative helicity: 66 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.7

Open this sounding in Storm Lab

The text

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

000 
WUUS54 KSJT 230556
SVRSJT
TXC319-230630-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SAN ANGELO TX
1255 AM CDT MON APR 23 2001

THE NATIONAL WEATHER SERVICE IN SAN ANGELO HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  MASON COUNTY IN SOUTH CENTRAL TEXAS

* UNTIL 145 AM CDT

* AT 1252 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 7 MILES NORTH OF STREETER...OR ABOUT 13 MILES
  NORTHWEST OF MASON...MOVING NORTHEAST AT 50 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
   MASON AT 100 AM CDT
   KATEMCY AT 105 AM CDT

THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH YOU SHOULD PREPARE
FOR DAMAGING WINDS IN EXCESS OF 55 MPH...LARGE HAIL...DEADLY
LIGHTNING...AND VERY HEAVY RAINFALL. MOVE INTO A STURDY BUILDING AND
STAY AWAY FROM WINDOWS.

REPORT SEVERE WEATHER TO THE NEAREST LAW ENFORCEMENT AGENCY. THEY
WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE.

LAT...LON 3092 9946 3074 9940 3074 9901 3093 9928

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 Apr 23, 12:14 AM CDT, 41 minutes earlier.

Area forecast discussion, Apr 23, 12:14 AM CDT, 41 minutes before

WEST CENTRAL TEXAS FORECAST DISCUSSION...UPDATE
NATIONAL WEATHER SERVICE SAN ANGELO TX
1214 AM CDT MON APR 23 2001

ZONE UPDATE WAS RECENTLY SENT TO ADJUST POPS UPWARD ACROSS THE
SOUTHEAST ZONES AND iTO HEADLINE NEW SEVERE THUNDERSTORM WATCH VALID
UNTIL 5 AM.

14

In the hours before

Local storm report, Apr 23, 12:37 AM CDT, 18 minutes before

LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SAN ANGELO TX
1237 AM CDT MON APR 23 2001

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

625 PM     COLEMAN                   TX   1.00 INCH HAIL
04/23/01   COLEMAN                        QUARTER SIZE HAIL

1004 PM    ELDORADO                  TX   0.75 INCH HAIL
04/23/01   SCHLEICHER                     DIME SIZE HAIL

1140 PM    BROWNWOOD                 TX   FLOODING
04/23/01   BROWN                          NUMEROUS STREETS AND
                                          ONE UNDERPASS FLOODED

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 22, 9:59 PM CDT	Severe Thunderstorm Warning	SJT	Schleicher	46 min
Apr 22, 10:03 PM CDT	Severe Thunderstorm Warning	SJT	Sutton	57 min
Apr 22, 10:45 PM CDT	Severe Thunderstorm Warning	SJT	Menard	60 min
Apr 22, 11:47 PM CDT	Flash Flood Warning	SJT	Brown	3 hr
Apr 22, 11:53 PM CDT	Severe Thunderstorm Warning	SJT	Sutton	67 min
Apr 22, 11:56 PM CDT	Severe Thunderstorm Warning	SJT	Kimble	64 min
Apr 23, 12:10 AM CDT	Severe Thunderstorm Warning	SJT	Menard	50 min
Apr 23, 12:46 AM CDT	Severe Thunderstorm Warning	SJT	McCulloch	44 min
Apr 23, 1:17 AM CDT	Severe Thunderstorm Warning	SJT	Kimble	43 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.