Alert archive / Texas / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 159, NWS Shreveport, LA

August 26, 2001Angelina County, Texas

NWS Shreveport, LA issued this severe thunderstorm warning at Aug 26, 2001, 3:56 PM CDT for Angelina County, Texas. It was in force for 19 min. No storm report in the archive falls 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.

The facts

Issued: Aug 26, 2001, 3:56 PM CDT (20:56 UTC)
Expired: Aug 26, 2001, 4:15 PM CDT
In force: 19 min
Issued by: NWS Shreveport, LA
Area: Whole counties; the outline is the Mesonet’s reconstruction

County Angelina County, TX

The radar

The Shreveport radar (KSHV), 158 km from the middle of the area, began a volume at 20:58 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

Shreveport, LA (KSHV), launched 12:00Z, 8.9 hours before the alert went out and 165 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: 1178 J/kg
Mixed-layer CIN: -62 J/kg
Mixed-layer LCL: 1105 m above ground
0-6 km bulk shear: 8 kt
0-1 km storm-relative helicity: -23 m²/s²
0-3 km storm-relative helicity: 100 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

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

784 
WUUS54 KSHV 262058
SVRSHV
TXC005-262115-
/NEW.KSHV.SV.W.0285.262056-262115/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SHREVEPORT LA
356 PM CDT SUN AUG 26 2001

THE NATIONAL WEATHER SERVICE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  ANGELINA COUNTY IN EASTERN TEXAS

* UNTIL 415 PM CDT

* AT 356 PM CDT...THE SHREVEPORT NATIONAL WEATHER SERVICE DOPPLER
  RADAR INDICATED A SEVERE THUNDERSTORM OVER CENTRAL ANGELINA        
  COUNTY...OR ABOUT 6 MILES SOUTH OF LUFKIN.  THIS STORM SHOWED VERY 
  LITTLE MOVEMENT.

THE MAIN THREAT FROM THIS STORM IS WIND GUSTS THAT MAY RESULT IN 
TREE AND POWER LINE DAMAGE.  ALSO DIME SIZE HAIL IS POSSIBLE.  THIS 
STORM WILL AFFECT THE LUFKIN TEXAS VICINITY.

REPEATING...THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE
THUNDERSTORM WARNING FOR...
  ANGELINA COUNTY IN EASTERN TEXAS
UNTIL 415 PM CDT.

LAT...LON 3126 9478 3120 9468 3125 9464 3132 9471

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 Shreveport, LA wrote its last area forecast discussion before this severe thunderstorm warning went out at Aug 26, 2:35 PM CDT, 1 hour 21 minutes earlier.

Area forecast discussion, Aug 26, 2:35 PM CDT, 1 hour 21 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SHREVEPORT LA
235 PM CDT SUN AUG 26 2001

WHOA NELLIE. MODELS SLOW DOWN THE PROGRESSION OF 1000/500 MB
MOISTURE...NOW THE SOUTHERN HALF OF CWA REMAINS AOA 70 PCT THROUGH
PERIOD. OUR SURFACE FRONT SEEMS TO BE A WASHOUT EARLY IN THE WORK
WEEK...AND WITH LITTLE IN THE WAY OF GENERAL STEERING...WE/LL
PROBABLY SEE ENUF SUN AND HEATING EACH AFTERNOON TO FIRE OFF THE
NECESSARY CONVECTION. FACILITATING SOME CONVECTION PERHAPS WILL BE A
MARGINAL 250 MB JET MAX OVER AR TONIGHT THROUGH MONDAY NIGHT...
KEEPING PORTIONS OF AREA IN RIGHT REAR AREA.

THE PREVIOUS DRY EXTENDED WILL BE DAMPENED A BIT WITH SLIGHT CHANCES
THROUGH SATURDAY...EXCEPT FOR CHANCES FRIDAY. FMR/MEX POPS GO EVEN
HIGHER BUT WILL NOT BITE ON THAT...AT LEAST TRENDING IN THE RIGHT
DIRECTION. AN UPPER TROUGH IS FORECAST BY AVN TO MOVE INTO OK/TX AND
TAP A RETURN FLOW OUT OF GULF...PEAKING DUE TO TROF AXIS PROXIMITY
ON FRIDAY...THUS THE REASON FOR FAVORING FRIDAY/S POPS IN EXTENDED.

RADAR GETTING ACTIVE...SO GONNA GO. 17

PRELIMS...

SHV 73/92/72/93/73 4432
MLU 72/92/71/92/71 4432
TXK 73/92/73/94/73 5322
TYR 72/92/73/93/73 4432
LFK 72/92/72/92/71 3434

.SHV...NONE.

In the hours before

Special weather statement, Aug 26, 10:30 AM CDT, 5 hours 26 minutes before

ARZ050-051-059>061-070>073-LAZ001>006-010>014-017>022-OKZ077-TXZ096-
097-108>112-124>126-136>138-149>153-165>167-261630-

THUNDERSTORM OUTLOOK
NATIONAL WEATHER SERVICE SHREVEPORT LA
1030 AM CDT SUN AUG 26 2001

OUTFLOW BOUNDARIES AND A WEAK COLD FRONT...WILL SERVE AS FOCAL
POINTS FOR THUNDERSTORM DEVELOPMENT THIS AFTERNOON AND EVENING.
SEA BREEZE THUNDERSTORMS WILL BE POSSIBLE THIS AFTERNOON ALONG THE
SOUTHERN PORTION OF THE AREA...FROM THE EAST TEXAS LAKES AREA TO
CENTRAL LOUISIANA. WITH THE DEVELOPMENT OF THUNDERSTORMS THIS
AFTERNOON AND EVENING...NEW OUTFLOW BOUNDARIES WILL BE PRODUCED...
WHICH IN TURN WILL HELP INITIATE ADDITIONAL OVERNIGHT THUNDERSTORMS.
THUS THERE IS THE POSSIBILITY OF THUNDERSTORMS THIS AFTERNOON
THROUGH TONIGHT FOR ALL OF THE FOUR STATES REGION. HOWEVER...A WEAK
SHEAR ENVIRONMENT ALOFT MEANS THAT SEVERE THUNDERSTORMS...IF ANY AT
ALL...WILL BE ISOLATED IN COVERAGE.

THE ACTIVATION OF EMERGENCY MANAGERS...STORM SPOTTERS...AND SKYWARN
NETWORKS...IS NOT ANTICIPATED TODAY THROUGH TONIGHT.

Local storm report, Aug 26, 3:40 PM CDT, 16 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SHREVEPORT LA
340 PM CDT SUN AUG 26 2001

TIME(CDT)  .....CITY LOCATION..... STATE  ...EVENT/REMARKS...
           ....PARISH/COUNTY LOCATION....

0255 PM    5 N DE QUEEN              AR   .75 INCH HAIL
08/26/01   SEVIER                         SHERIFF OFFICE REPORT.

VIII.

Local storm report, Aug 26, 3:46 PM CDT, 10 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SHREVEPORT LA
346 PM CDT SUN AUG 26 2001

TIME(CDT)  .....CITY LOCATION..... STATE  ...EVENT/REMARKS...
           ....PARISH/COUNTY LOCATION....

0343 PM    ASHDOWN                   AR   .75 INCH HAIL
08/26/01   LITTLE RIVER                   EMERGENCY MANAGEMENT
                                          OFFICER REPORT.

VIII.

The office that day

Everything else NWS Shreveport, LA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Aug 26, 4:26 PM CDT	Severe Thunderstorm Warning	SHV	Red River	19 min
Aug 26, 6:21 PM CDT	Severe Thunderstorm Warning	SHV	Harrison	39 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.