Alert archive / Texas / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 5, NWS San Angelo, TX

February 8, 2001Coleman County, Runnels County, Texas

NWS San Angelo, TX issued this severe thunderstorm warning at Feb 8, 2001, 11:23 PM CST for Coleman County, Runnels County, Texas. It was in force for 67 min. 2 reports came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued: Feb 8, 2001, 11:23 PM CST (05:23 UTC)
Expired: Feb 9, 2001, 12:30 AM CST
In force: 67 min
Issued by: NWS San Angelo, TX
Area: Whole counties

Counties Coleman County, TX, Runnels County, TX

The radar

The San Angelo radar (KSJT), 88 km from the middle of the area, began a volume at 05:24 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.

What was reported inside it

Time	Report	Where	Remark
Feb 8, 11:35 PM CST	Hail 0.75	Winters, TX
Feb 9, 12:25 AM CST	Thunderstorm Wind 52 E	Glen Cove, TX	Winds estimated at 60 mph.

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
Feb 8, 9:00 PM CST	Severe Thunderstorm Watch	SPC	6 hr
Feb 8, 11:00 PM CST	Tornado Watch	SPC	6 hr

The nearest sounding before it

Midland Regional, TX (KMAF), launched 00:00Z, 5.4 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: 247 J/kg
Mixed-layer CIN: -99 J/kg
Mixed-layer LCL: 1237 m above ground
0-6 km bulk shear: 84 kt
0-1 km storm-relative helicity: 302 m²/s²
0-3 km storm-relative helicity: 256 m²/s²
Significant tornado parameter: 0.3
Supercell composite: 3.0

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 Feb 8, 1:56 PM CST, 9 hours 27 minutes earlier.

Area forecast discussion, Feb 8, 1:56 PM CST, 9 hours 27 minutes before

WEST CENTRAL TEXAS FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN ANGELO TX
156 PM CST THU FEB 8 2001

DAMAGING WIND/LARGE HAIL EVENT EXPECTED TONIGHT ACROSS WEST CENTRAL
TEXAS. SEE SJT THUNDERSTORM OUTLOOK OR SPSSJT FOR DETAILS.

LOW LEVEL MOISTURE HAS INCREASED DRAMATICALLY IN THE PAST 24 HRS.
SURFACE DEWPOINTS ARE NOW AROUND 60 F WITH 850 MB DEWPOINTS NEAR
10 C. INFLUX OF MOISTURE CONTRIBUTING TO CAPES OF 800-1600 J/KG...IN
SPITE OF A DENSE CIRRUS CANOPY. WITH UNSEASONABLY HIGH PRECIPITABLE
WATER VALUES...RAINFALL COULD EXCEED ONE INCH LOCALLY TONIGHT. PER
THE 12Z MESOETA...DRYLINE/PACIFIC COLD FRONT TO REACH SJT AND ABI
AROUND 9 PM...THEN EXIT OUR EASTERN COUNTIES BY 2AM. WE/LL HIGHLIGHT
SEVERE THREAT IN THE 4 PM PACKAGE. NOT ENOUGH ADJECTIVES TO DESCRIBE
DEGREE OF LIFT. MESOETA 700 MB OMEGA FIELDS TELL THE STORY HERE.
NUFF SAID.

ON FRIDAY...SOME WRAP AROUND CLOUDINESS FORESEEN ACROSS THE BIG
COUNTRY. OTHERWISE...MUCH COOLER AS COLD AIR ADVECTION DOMINATE
IN LOW LEVELS. NORTH WINDS TO PUT A CHILL IN THE AIR. COLD FRIDAY
NIGHT AS BOUNDARY LAYER DECOUPLES. STILL RATHER COOL ON SATURDAY AS
MODIFIED ARCTIC AIRMASS SLOW TO ERODE.

IN THE EXTENDED...ZONAL FLOW TO RESULT IN MILD CONDITIONS SUNDAY
THROUGH THURSDAY.

ABI 042/052/026/049 7000
SJT 045/057/025/053 6000
JCT 048/062/029/056 8000

.SJT...LAKE CAUTION.

17

The office that day

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

Issued	Product	Office	Counties	Lasted
Feb 8, 9:30 PM CST	Severe Thunderstorm Warning	SJT	Fisher	60 min
Feb 8, 10:45 PM CST	Severe Thunderstorm Warning	SJT	Jones, Taylor	60 min
Feb 8, 11:19 PM CST	Severe Thunderstorm Warning	SJT	Shackelford, Throckmorton	56 min
Feb 8, 11:19 PM CST	Severe Thunderstorm Warning	SJT	Callahan	56 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.