Alert archive / Texas / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 140, NWS Shreveport, LA

May 7, 2012Red River County, Texas

NWS Shreveport, LA issued this severe thunderstorm warning at May 7, 2012, 10:29 PM CDT for Red River County, Texas. It was in force for 61 min. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: May 7, 2012, 10:29 PM CDT (03:29 UTC)
Expired: May 7, 2012, 11:30 PM CDT
In force: 61 min
Issued by: NWS Shreveport, LA
Area: Storm-based polygon

County Red River County, TX

The radar

The Shreveport radar (KSHV), 180 km from the middle of the area, began a volume at 03:31 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
May 7, 11:15 PM CDT	HAIL 0.88	Detroit, TX

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

Did it verify

Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this severe thunderstorm warning while it was in force. That is not proof nothing happened: reports are thin where few people live.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

The nearest sounding before it

Shreveport, LA (KSHV), launched 00:00Z, 3.5 hours before the alert went out and 184 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: 891 J/kg
Mixed-layer CIN: -79 J/kg
Mixed-layer LCL: 1717 m above ground
0-6 km bulk shear: 16 kt
0-1 km storm-relative helicity: 30 m²/s²
0-3 km storm-relative helicity: 72 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.

541 
WUUS54 KSHV 080329
SVRSHV
TXC387-080430-
/O.NEW.KSHV.SV.W.0140.120508T0329Z-120508T0430Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SHREVEPORT LA
1029 PM CDT MON MAY 7 2012

THE NATIONAL WEATHER SERVICE IN SHREVEPORT HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  RED RIVER COUNTY IN NORTHEAST TEXAS...
  THIS INCLUDES THE CITY OF CLARKSVILLE...

* UNTIL 1130 PM CDT

* AT 1026 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
  DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED NEAR
  BAGWELL...OR 9 MILES NORTHWEST OF CLARKSVILLE...AND MOVING
  SOUTHEAST AT 5 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  BOGATA...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IN ADDITION TO LARGE HAIL AND DAMAGING WINDS...CONTINUOUS CLOUD TO
GROUND LIGHTNING IS OCCURRING WITH THIS STORM. MOVE INDOORS 
IMMEDIATELY. LIGHTNING IS ONE OF NATURES NUMBER ONE KILLERS. 
REMEMBER...IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE 
STRUCK BY LIGHTNING.

&&

LAT...LON 3383 9512 3353 9482 3338 9525 3354 9532
      3370 9532
TIME...MOT...LOC 0329Z 314DEG 6KT 3367 9520

$$

06

2 follow-up statements

305 
WWUS54 KSHV 080400
SVSSHV

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SHREVEPORT LA
1100 PM CDT MON MAY 7 2012

TXC387-080430-
/O.CON.KSHV.SV.W.0140.000000T0000Z-120508T0430Z/
RED RIVER TX-
1100 PM CDT MON MAY 7 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1130 PM CDT
FOR RED RIVER COUNTY...

AT 1055 PM CDT...USING DOPPLER RADAR...NATIONAL WEATHER SERVICE
METEOROLOGISTS CONTINUED TO DETECT A SEVERE THUNDERSTORM CAPABLE OF
PRODUCING QUARTER SIZE HAIL.  THIS STORM WAS LOCATED NEAR BAGWELL...
OR 8 MILES WEST OF CLARKSVILLE...MOVING SOUTH AT 15 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
JOHNTOWN...CUTHAND AND BOGATA

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IN ADDITION TO LARGE HAIL...CLOUD TO GROUND LIGHTNING IS OCCURRING 
WITH THIS STORM. MOVE INDOORS IMMEDIATELY. LIGHTNING IS ONE OF 
NATURES NUMBER ONE KILLERS. 

&&

LAT...LON 3366 9531 3372 9516 3368 9511 3350 9492
      3338 9525 3354 9532
TIME...MOT...LOC 0400Z 341DEG 12KT 3359 9519

$$

06

964 
WWUS54 KSHV 080424
SVSSHV

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SHREVEPORT LA
1124 PM CDT MON MAY 7 2012

TXC387-080430-
/O.CON.KSHV.SV.W.0140.000000T0000Z-120508T0430Z/
RED RIVER TX-
1124 PM CDT MON MAY 7 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1130 PM CDT
FOR RED RIVER COUNTY...

AT 1120 PM CDT...A SEVERE THUNDERSTORM WAS REPORTED CAPABLE OF
PRODUCING DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED
NEAR DETROIT...OR 10 MILES WEST OF CLARKSVILLE...MOVING SOUTH AT 10
MPH.

THE SEVERE THUNDERSTORM WILL OTHERWISE REMAIN OVER MAINLY RURAL AREAS
OF THE INDICATED COUNTY NEAR DETROIT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IN ADDITION TO LARGE HAIL AND DAMAGING WINDS...CONTINUOUS CLOUD TO 
GROUND LIGHTNING IS OCCURRING WITH THIS STORM. LIGHTNING IS ONE OF 
NATURES NUMBER ONE KILLERS. 

&&

LAT...LON 3368 9513 3361 9503 3351 9516 3354 9531
      3366 9531 3372 9516
TIME...MOT...LOC 0423Z 340DEG 11KT 3366 9522

$$

06

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 May 7, 9:55 PM CDT, 34 minutes earlier.

Area forecast discussion, May 7, 9:55 PM CDT, 34 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SHREVEPORT LA
955 PM CDT MON MAY 7 2012

.DISCUSSION...
UPDATING FOR SVR TSTM WATCH EXPIRATION AT 10 PM FOR SW AR/SE OK.
STORMS HAVE SHIFTED SOUTH OF THIS AREA...EXCEPT FOR A FEW
LINGERING NON SEVERE STORMS JUST SOUTH OF RED RIVER VALLEY.
FURTHER SOUTH...STORMS REMAIN INTENSE...WITH ISOLD SVR WX STILL
POSSIBLE./VII/.

&&

.AVIATION...
SCATTERED TO NUMEROUS THUNDERSTORMS FROM SOUTHWEST ARKANSAS INTO
NORTHEAST TEXAS AND NORTH LOUISIANA WERE CREATING LOWERED FLIGHT
CONDITIONS AND FLIGHT HAZARDOUS DUE TO EXTREME TURBULENCE...STRONG
WIND AND HAIL. THE STORMS WILL CONTINUE TO MOVE SOUTHEAST THROUGHOUT
THE REMAINDER OF TONIGHT AHEAD OF A COLD FRONT. OUTSIDE THE
CONVECTIVE AREAS MOSTLY VFR CONDITIONS. BEHIND THE FRONT...AFTER
09Z...EXPECT SOME MVFR CIGS TO DEVELOP WHICH WILL CONTINUE TO AROUND
NOON TUESDAY. SURFACE WIND SOUTHERLY 5 TO 10 KTS AHEAD OF THE
FRONTAL BOUNDARY...BECOMING NORTHWEST 8 TO 12 KTS AFTER FRONTAL
PASSAGE. /14/

&&

.PRELIMINARY POINT TEMPS/POPS...
SHV  70  81  63  79  56 /  50  50  40  20  10
MLU  68  84  63  80  54 /  40  50  50  30  10
DEQ  64  77  55  79  49 /  30  30  20  10  10
TXK  66  78  59  79  53 /  30  50  30  20  10
ELD  65  78  59  79  50 /  40  50  30  20  10
TYR  67  77  60  78  55 /  70  50  40  20  10
GGG  68  79  61  78  53 /  70  50  40  20  10
LFK  70  83  64  80  57 /  40  50  40  20  20

&&

.SHV WATCHES/WARNINGS/ADVISORIES...
AR...NONE.
LA...NONE.
OK...NONE.
TX...NONE.
&&

Hazardous weather outlook, May 7, 11:36 AM CDT, 10 hours 53 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE SHREVEPORT LA
1136 AM CDT MON MAY 7 2012

ARZ050-051-059>061-070>073-LAZ001>006-010>014-017>022-OKZ077-
TXZ096-097-108>112-124>126-136>138-149>153-165>167-081200-
SEVIER-HOWARD-LITTLE RIVER-HEMPSTEAD-NEVADA-MILLER-LAFAYETTE-
COLUMBIA-UNION AR-CADDO-BOSSIER-WEBSTER-CLAIBORNE-LINCOLN-
UNION LA-DE SOTO-RED RIVER-BIENVILLE-JACKSON-OUACHITA-SABINE LA-
NATCHITOCHES-WINN-GRANT-CALDWELL-LA SALLE-MCCURTAIN-BOWIE-
FRANKLIN-TITUS-CAMP-MORRIS-CASS-WOOD-UPSHUR-MARION-SMITH-GREGG-
HARRISON-CHEROKEE-RUSK-PANOLA-NACOGDOCHES-SHELBY-ANGELINA-
SAN AUGUSTINE-SABINE TX-
1136 AM CDT MON MAY 7 2012

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTH CENTRAL
ARKANSAS...SOUTHWEST ARKANSAS...NORTH CENTRAL LOUISIANA...
NORTHWEST LOUISIANA...SOUTHEAST OKLAHOMA...EAST TEXAS AND
NORTHEAST TEXAS.

.DAY ONE...THIS AFTERNOON AND TONIGHT...

SHOWERS AND THUNDERSTORMS WILL BE POSSIBLE THIS AFTERNOON AND
EVENING AS A COLD FRONT MOVES INTO THE AREA FROM THE NORTHWEST.
ALSO...SHOWERS AND THUNDERSTORMS MAY DEVELOP ALONG AN OUTFLOW
BOUNDARY MOVING INTO THE AREA FROM THE NORTH. SOME THUNDERSTORMS
THAT DEVELOP MAY BECOME SEVERE...WITH THE MAIN THREATS BEING LARGE
HAIL AND DAMAGING WINDS.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY...

SHOWERS AND THUNDERSTORMS WILL ONCE AGAIN BE POSSIBLE ACROSS THE
AREA ON TUESDAY AND WEDNESDAY...AS THE SLOW TO MOVE COLD FRONT REMAINS
NEAR THE AREA. ALSO...SHOWERS AND THUNDERSTORMS WILL BE POSSIBLE
AGAIN THIS WEEKEND AS AN UPPER LEVEL LOW AND SURFACE COLD FRONT
APPROACH THE AREA FROM THE WEST.

.SPOTTER INFORMATION STATEMENT...

ACTIVATION OF EMERGENCY MANAGEMENT PERSONNEL...AMATEUR RADIO
OPERATORS...AND STORM SPOTTERS MAY BE NEEDED THIS AFTERNOON THROUGH
TONIGHT.

20

In the hours before

Local storm report, May 7, 9:35 PM CDT, 54 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SHREVEPORT LA
935 PM CDT MON MAY 07 2012

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0905 PM     TSTM WND DMG     AVINGER                 32.90N 94.55W
05/07/2012                   CASS               TX   LAW ENFORCEMENT

            TREES REPORTED DOWN IN SOUTHERN CASS COUNTY NEAR AVINGER.

&&

20

Local storm report, May 7, 9:40 PM CDT, 49 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SHREVEPORT LA
940 PM CDT MON MAY 07 2012

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0545 PM     TSTM WND DMG     NASHVILLE               33.94N 93.85W
05/07/2012                   HOWARD             AR   TRAINED SPOTTER

            TREES AND POWERLINES REPORTED DOWN.

&&

20

Local storm report, May 7, 9:51 PM CDT, 38 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SHREVEPORT LA
951 PM CDT MON MAY 07 2012

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0930 PM     TSTM WND DMG     BIENVILLE               32.36N 92.98W
05/07/2012                   BIENVILLE          LA   LAW ENFORCEMENT

            TREE DOWN ACROSS THE ROAD NEAR THE TOWN OF BIENVILLE.

&&

20

Local storm report, May 7, 10:03 PM CDT, 26 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SHREVEPORT LA
1003 PM CDT MON MAY 07 2012

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0950 PM     TSTM WND DMG     HALLSVILLE              32.50N 94.58W
05/07/2012                   HARRISON           TX   FIRE DEPT/RESCUE

            TREE REPORTED DOWN ON HOUSE ALONG FM 450 NEAR HALLSVILLE.

&&

20

Special weather statement, May 7, 10:08 PM CDT, 21 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SHREVEPORT LA
1008 PM CDT MON MAY 7 2012

LAZ010>012-018-019-080415-
BIENVILLE-DE SOTO-NATCHITOCHES-RED RIVER-WINN-
1008 PM CDT MON MAY 7 2012

...SIGNIFICANT WEATHER ADVISORY...

THE NATIONAL WEATHER SERVICE IN SHREVEPORT HAS ISSUED A SIGNIFICANT
WEATHER ADVISORY...EFFECTIVE UNTIL 1115 PM CDT...FOR THE FOLLOWING
PARISHES...

IN NORTHWEST LOUISIANA...
     RED RIVER...NATCHITOCHES...DE SOTO AND BIENVILLE...
IN NORTH CENTRAL LOUISIANA...
     WINN...

INCLUDING THE FOLLOWING LOCATIONS...
     CAMPTI AND COUSHATTA...

AT 1006 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS WERE
DETECTING A STRONG THUNDERSTORM 15 MILES NORTHEAST OF COUSHATTA...OR
26 MILES WEST OF JONESBORO...MOVING SOUTHEAST AT 20 MPH.

DIME SIZE HAIL...AND WINDS 30 TO 40 MPH ARE EXPECTED WITH THIS STORM.

20

Local storm report, May 7, 10:10 PM CDT, 19 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SHREVEPORT LA
1010 PM CDT MON MAY 07 2012

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0940 PM     TSTM WND DMG     MARSHALL                32.54N 94.35W
05/07/2012                   HARRISON           TX   EMERGENCY MNGR

            TREES AND POWERLINES DOWN IN DOWNTOWN MARSHALL...WITH ONE
            TREE ON A HOUSE.

&&

20

The office that day

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

Issued	Product	Office	Counties	Lasted
May 7, 7:29 PM CDT	Severe Thunderstorm Warning	SHV	Camp, Franklin, Upshur, Wood	46 min
May 7, 7:42 PM CDT	Severe Thunderstorm Warning	SHV	Bowie, Camp, Morris, Red River, Titus	33 min
May 7, 8:17 PM CDT	Severe Thunderstorm Warning	SHV	Camp, Cass, Morris, Titus, Upshur	43 min
May 7, 8:29 PM CDT	Severe Thunderstorm Warning	SHV	Smith, Wood	46 min
May 7, 8:50 PM CDT	Severe Thunderstorm Warning	SHV	Cass, Harrison, Marion, Morris, Upshur	55 min
May 7, 9:27 PM CDT	Severe Thunderstorm Warning	SHV	Gregg, Harrison, Upshur	48 min
May 7, 10:37 PM CDT	Areal Flood Advisory	SHV	Camp, Franklin, Morris, Titus, Upshur, Wood	3 hr
May 8, 5:32 PM CDT	Severe Thunderstorm Warning	SHV	Morris, Red River, Titus	58 min
May 8, 5:56 PM CDT	Areal Flood Advisory	SHV	Morris, Red River, Titus	64 min
May 8, 6:17 PM CDT	Severe Thunderstorm Warning	SHV	Gregg, Harrison, Marion, Upshur	43 min
May 8, 6:57 PM CDT	Areal Flood Advisory	SHV	Morris, Red River, Titus	2 hr

Nearby

Severe Thunderstorm Warnings in Texas, 2012 Every severe thunderstorm warning in 2012

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.