Alert archive / Texas / Severe Thunderstorm Warnings in 1999

Severe Thunderstorm Warning 41, NWS Midland/Odessa, TX

April 13, 1999Pecos County, Texas

NWS Midland/Odessa, TX issued this severe thunderstorm warning at Apr 13, 1999, 8:38 PM CDT for Pecos County, Texas. It was in force for 62 min. 1 report 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: Apr 13, 1999, 8:38 PM CDT (01:38 UTC)
Expired: Apr 13, 1999, 9:40 PM CDT
In force: 62 min
Issued by: NWS Midland/Odessa, TX
Area: Whole counties

County Pecos County, TX

What was reported inside it

Time	Report	Where	Remark
Apr 13, 9:20 PM CDT	Hail 1.75	Sheffield, TX	This storm formed southeast of Fort Stockton and moved over open country until coming to Sheffield.

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 nearest sounding before it

Midland Regional, TX (KMAF), launched 00:00Z, 1.6 hours before the alert went out and 139 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: 15 J/kg
Mixed-layer CIN: -195 J/kg
Mixed-layer LCL: 2360 m above ground
0-6 km bulk shear: 69 kt
0-1 km storm-relative helicity: -128 m²/s²
0-3 km storm-relative helicity: 171 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.3

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 Midland/Odessa, TX wrote its last area forecast discussion before this severe thunderstorm warning went out at Apr 13, 1:35 PM CDT, 7 hours 3 minutes earlier.

Area forecast discussion, Apr 13, 1:35 PM CDT, 7 hours 3 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE MIDLAND TX
135 PM CDT TUE APR 13 1999

DOING DISCUSSION A LITTLE EARLY TODAY. UPPER LEVEL LOW MOVING
EWD OVER ERN AZ/WRN NM AREA THIS HOUR...RESULTING IN FAVORABLE UPPER
LEVEL DIFLUENCE ACROSS THE MAF CWA. DRYLINE IN ERN NM BEGINNING TO
PROGRESS EWD...WITH CONVECTION BEGINNING TO DEVELOP...ALTHOUGH
SOMEWHAT SLOWLY DUE TO THE PRESENCE OF A CAP. SIGNIFICANT LOW LEVEL
MOISTURE IS IN PLACE AHEAD OF THE DRYLINE WITH AN UNSTABLE AIRMASS.
IF THE CAP MANAGES TO BREAK BEFORE THE DRYLINE ARRIVES...SHOULD SEE
SOME PRETTY SIGNIFICANT CONVECTION DEVELOP. SFC BASED CAPES 2000-2500
J/KG ACROSS PORTIONS OF THE PERMIAN BASIN AT THIS HOUR AND
INCREASING AS DAYTIME HEATING CONTINUES. IN ADDITION...LOW LEVEL SELY
FLO AHEAD OF THE DRYLINE IS RESULTING IN A FAIRLY IMPRESSIVE
HODOGRAPH. CONVECTION SHOULD CLEAR OUT OF THE MAF CWA THIS EVENING...
WITH EVERYTHING EVENTUALLY SWEEPING EWD AS THE PAC FRONT COMES
THROUGH AND A DRY SLOT ROTATES AROUND THE APPROACHING LOW. IT APPEARS
THAT THE UPPER LOW WILL TRACK INTO THE PANHANDLE BY TOMORROW MORNING.
WILL ANTICIPATE SOME WRAP AROUND CLOUDINESS OVER THE NORTHERN HALF OF
THE CWA TOMORROW...PER MODEL FORECASTS AND CURRENT SATELLITE TRENDS
INVOF LOW. SKIES SHOULD CLEAR OUT NICELY WEDNESDAY NIGHT AS THE UPPER
LOW PROGRESSES EWD.

PRELIM NUMBERS
MAF 48/70/38/72 2-00
CNM 46/65/41/73 0000
MRF 40/61/34/64 0000
P07 51/73/46/75 3000

DJK

In the hours before

Special weather statement, Apr 13, 7:24 PM CDT, 1 hour 14 minutes before

TXZ045>048-080645-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MIDLAND TX
723 PM CDT THU APR 8 1999

THE TORNADO WATCH #149 HAS BEEN CANCELLED FOR THE FOLLOWING
COUNTIES...

GAINES...DAWSON...ANDREWS...MARTIN...ECTOR...MIDLAND...CRANE...

THE THREAT OF TORNADOES AND SEVERE WEATHER HAS DIMINISHED ACROSS THE
WESTERN PERMIAN BASIN AND THE EXTREME SOUTHWESTERN SOUTH PLAINS OF
TEXAS.  TORNADO WATCH #149 REMAINS IN EFFECT FOR BORDEN...SCURRY...
HOWARD...GLASSCOCK...REAGAN...AND UPTON COUNTIES UNTIL 10 PM CDT.

SD

The office that day

Everything else NWS Midland/Odessa, TX issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Apr 13, 7:12 PM CDT	Severe Thunderstorm Warning	MAF	Howard	33 min
Apr 13, 7:32 PM CDT	Flash Flood Warning	MAF	Howard	88 min
Apr 13, 7:32 PM CDT	Severe Thunderstorm Warning	MAF	Scurry	28 min
Apr 13, 8:21 PM CDT	Severe Thunderstorm Warning	MAF	Howard	49 min
Apr 13, 8:46 PM CDT	Severe Thunderstorm Warning	MAF	Reagan	64 min

Nearby

Severe Thunderstorm Warnings in Texas, 1999 Every severe thunderstorm warning in 1999

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.