Alert archive / Texas / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 147, NWS San Angelo, TX

September 9, 2001Coleman County, Texas

NWS San Angelo, TX issued this severe thunderstorm warning at Sep 9, 2001, 1:45 AM CDT for Coleman County, Texas. It was in force for 60 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Sep 9, 2001, 1:45 AM CDT (06:45 UTC)
Expired: Sep 9, 2001, 2:45 AM CDT
In force: 60 min
Issued by: NWS San Angelo, TX
Area: Whole counties; the outline is the Mesonet’s reconstruction

County Coleman County, TX

The nearest sounding before it

Fort Worth, TX (KFWD), launched 00:00Z, 6.8 hours before the alert went out and 235 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: 3809 J/kg
Mixed-layer CIN: -5 J/kg
Mixed-layer LCL: 1100 m above ground
0-6 km bulk shear: 27 kt
0-1 km storm-relative helicity: 22 m²/s²
0-3 km storm-relative helicity: 95 m²/s²
Significant tornado parameter: 0.7
Supercell composite: 4.0

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

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 8, 2:54 PM CDT, 10 hours 51 minutes earlier.

Area forecast discussion, Sep 8, 2:54 PM CDT, 10 hours 51 minutes before

WEST CENTRAL TEXAS FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN ANGELO TX
254 PM CDT SAT SEP 8 2001

SPC PONDERING WATCH IN VICINITY OF STALLED FRONT ACROSS THE BIG
COUNTRY. CAPES IN EXCESS OF 4000 J/KG ACROSS THE EASTERN HALF OF
THE SJT CWFA. SAVING GRACE STRONG CAP. BUT CAP SOON TO ERODE AS
LARGE SCALE VERTICAL MOTION ASSOCIATED WITH POTENT SHORTWAVE
TROUGH ARRIVES. STAY TUNED.

WITH EXTREME INSTABILITY...COPIOUS MOISTURE AND FAVORABLE
DYNAMICS...OPTED FOR LIKELY OR CATEGORICAL POPS ACROSS MOST OF
THE CWFA. GOING TO MENTION POSSIBILITY OF LARGE HAIL...DAMAGING
WINDS AND LOCALLY HEAVY RAINFALL TONIGHT AS STRONG COLD FRONT
PLOWS SOUTHWARD.

LINGERING SHOWERS AND THUNDERSTORMS EXPECTED SUNDAY OVER THE
SOUTHERN HALF. GRADUAL CLEARING SUNDAY NIGHT AND MONDAY AS HIGH
PRESSURE BUILDS AT THE SURFACE. TUESDAY THROUGH SATURDAY BENIGN
WITH AMPLE SUNSHINE AND SEASONAL TEMPERATURES.

PRELIMS...

ABI 063/076/057/082 7000
SJT 065/075/059/085 6200
JCT 068/074/062/084 8400

.SJT...NONE.

17

In the hours before

Local storm report, Sep 8, 11:05 PM CDT, 2 hours 40 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 8, 7:38 PM CDT	Severe Thunderstorm Warning	SJT	Shackelford	37 min
Sep 8, 8:04 PM CDT	Severe Thunderstorm Warning	SJT	Callahan	41 min
Sep 8, 8:27 PM CDT	Flash Flood Warning	SJT	Shackelford	3 hr
Sep 8, 8:30 PM CDT	Tornado Warning	SJT	Callahan	30 min
Sep 8, 9:01 PM CDT	Tornado Warning	SJT	Callahan	44 min
Sep 8, 9:18 PM CDT	Severe Thunderstorm Warning	SJT	Brown, Coleman	57 min
Sep 8, 9:33 PM CDT	Tornado Warning	SJT	Brown, Coleman	42 min
Sep 8, 10:12 PM CDT	Tornado Warning	SJT	Brown	33 min
Sep 8, 10:47 PM CDT	Severe Thunderstorm Warning	SJT	Brown	43 min
Sep 8, 10:51 PM CDT	Severe Thunderstorm Warning	SJT	Coleman	54 min
Sep 9, 12:29 AM CDT	Severe Thunderstorm Warning	SJT	Coleman	46 min
Sep 9, 1:16 AM CDT	Severe Thunderstorm Warning	SJT	Coleman	29 min
Sep 9, 7:08 AM CDT	Flash Flood Warning	SJT	Menard	3 hr

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.