Alert archive / Texas / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 153, NWS San Angelo, TX

September 18, 2001Concho County, Texas

NWS San Angelo, TX issued this severe thunderstorm warning at Sep 18, 2001, 8:58 PM CDT for Concho County, Texas. It was in force for 62 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 18, 2001, 8:58 PM CDT (01:58 UTC)
Expired: Sep 18, 2001, 10:00 PM CDT
In force: 62 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), 60 km from the middle of the area, began a volume at 02:00 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, 2.0 hours before the alert went out and 232 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

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 18, 6:17 PM CDT, 2 hours 41 minutes earlier.

Area forecast discussion, Sep 18, 6:17 PM CDT, 2 hours 41 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

Local storm report, Sep 18, 7:07 PM CDT, 1 hour 51 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

Local storm report, Sep 18, 8:23 PM CDT, 35 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 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, 8:04 PM CDT	Severe Thunderstorm Warning	SJT	Concho	56 min
Sep 18, 8:18 PM CDT	Severe Thunderstorm Warning	SJT	Brown	57 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.