Alert archive / Texas / Severe Thunderstorm Warnings in 2000

Severe Thunderstorm Warning 97, NWS San Angelo, TX

April 30, 2000Callahan County, Texas

NWS San Angelo, TX issued this severe thunderstorm warning at Apr 30, 2000, 8:43 PM CDT for Callahan County, Texas. It was in force for 32 min. 1 report came from 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, with what was reported inside it.

The facts

Issued: Apr 30, 2000, 8:43 PM CDT (01:43 UTC)
Expired: Apr 30, 2000, 9:15 PM CDT
In force: 32 min
Issued by: NWS San Angelo, TX
Area: Whole counties; the outline is the Mesonet’s reconstruction

County Callahan County, TX

What was reported inside it

Time	Report	Where	Remark
Apr 30, 8:50 PM CDT	Hail 0.88	Cross Plains, TX

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.

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 30, 4:30 PM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Fort Worth, TX (KFWD), launched 00:00Z, 1.7 hours before the alert went out and 189 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: 2110 J/kg
Mixed-layer CIN: -27 J/kg
Mixed-layer LCL: 844 m above ground
0-6 km bulk shear: 33 kt
0-1 km storm-relative helicity: 307 m²/s²
0-3 km storm-relative helicity: 394 m²/s²
Significant tornado parameter: 3.9
Supercell composite: 30.2

Open this sounding in Storm Lab

The text

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

000 
WUUS54 KSJT 010145
SVRSJT
TXC059-010215-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SAN ANGELO TX
843 PM CDT SUN APR 30 2000

THE NATIONAL WEATHER SERVICE IN SAN ANGELO HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CALLAHAN COUNTY IN NORTH CENTRAL TEXAS

* UNTIL 915 PM CDT

* AT 841 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 2 MILES NORTH OF ATWELL...OR ABOUT 7 MILES
  NORTHWEST OF CROSS PLAINS...MOVING NORTHEAST AT 30 MPH.

DAMAGING WINDS AND LARGE HAIL ARE LIKELY. GO INSIDE A STURDY BUILDING
AND STAY AWAY FROM WINDOWS. HEAVY RAINS FLOOD ROADS QUICKLY SO DO NOT
DRIVE INTO AREAS WHERE WATER COVERS THE ROAD.

LAT...LON 3230 9930 3218 9916 3225 9913 3249 9915

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 30, 8:29 PM CDT, 14 minutes earlier.

Area forecast discussion, Apr 30, 8:29 PM CDT, 14 minutes before

AREA FORECAST DISCUSSION...UPDATED
NATIONAL WEATHER SERVICE SAN ANGELO TX
829 PM CDT SUN APR 30 2000

...TORNADO WATCH IS IN EFFECT FOR HASKELL AND THROCKMORTON COUNTIES UNTIL
1000PM...

HAVE UPDATED ZONES TO REMOVE SOME OF THE WESTERN COUNTIES FROM THREAT OF
SEVERE THUNDERSTORMS.  FRONT HAS JUST PASSED STERLING CITY AND SWEETWATER.
DROPPED FISHER...NOLAN...STERLING...IRION FROM SEVERE THUNDERSTORM THREAT.

.SJT...NONE.

15
N

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 30, 7:43 PM CDT	Severe Thunderstorm Warning	SJT	Runnels	47 min
Apr 30, 7:59 PM CDT	Severe Thunderstorm Warning	SJT	Coleman	76 min
Apr 30, 8:28 PM CDT	Severe Thunderstorm Warning	SJT	Runnels, Tom Green	62 min
Apr 30, 8:31 PM CDT	Tornado Warning	SJT	Coleman	44 min
Apr 30, 8:51 PM CDT	Severe Thunderstorm Warning	SJT	Crockett	59 min
Apr 30, 9:04 PM CDT	Tornado Warning	SJT	Brown	41 min
Apr 30, 9:14 PM CDT	Severe Thunderstorm Warning	SJT	Coleman	61 min
Apr 30, 9:17 PM CDT	Severe Thunderstorm Warning	SJT	Schleicher	73 min
Apr 30, 9:45 PM CDT	Severe Thunderstorm Warning	SJT	Brown	45 min
Apr 30, 11:20 PM CDT	Severe Thunderstorm Warning	SJT	Sutton	40 min

Nearby

Severe Thunderstorm Warnings in Texas, 2000 Every severe thunderstorm warning in 2000

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.