Alert archive / Louisiana / Severe Thunderstorm Warnings in 2009

Severe Thunderstorm Warning 252, NWS Shreveport, LA

July 16, 2009Harrison County, Marion County, Panola County, Texas; 6 parishes in Louisiana

NWS Shreveport, LA issued this severe thunderstorm warning at Jul 16, 2009, 9:00 PM CDT for Harrison County, Marion County, Panola County, Texas; 6 parishes in Louisiana. It was in force for 60 min. 4 reports 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: Jul 16, 2009, 9:00 PM CDT (02:00 UTC)
Expired: Jul 16, 2009, 10:00 PM CDT
In force: 60 min
Issued by: NWS Shreveport, LA
Area: Storm-based polygon

Counties Bienville Parish, LA, Bossier Parish, LA, Caddo Parish, LA, De Soto Parish, LA, Red River Parish, LA, Webster Parish, LA, Harrison County, TX, Marion County, TX, Panola County, TX

The radar

The Shreveport radar (KSHV), 21 km from the middle of the area, began a volume at 02:01 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
Jul 16, 9:25 PM CDT	TSTM WND DMG	Ringgold, LA	TREE DOWN AT THE INTERSECTION OF HWY 4 AND AND HWY 790.
Jul 16, 9:26 PM CDT	TSTM WND DMG	Shreveport, LA	SWEPCO REPORTS NEARLY 13000 CUSTOMERS WITHOUT POWER IN BOSSIER PARISH AND AROUND 5000 CUSTOMERS WITHOUT POWER IN CADDO PARISH.
Jul 16, 9:45 PM CDT	TSTM WND DMG	Ringgold, LA	LARGE TREE DOWN ON HWY 4 AND ANOTHER TREE DOWNED ON DANVEY ROAD NEAR RINGGOLD.
Jul 16, 9:55 PM CDT	TSTM WND DMG	Castor, LA	LARGE TREE DOWN BLOCKING THE ROAD AT HWY 507 JUST OUTSIDE OF CASTOR.

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

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Jul 16, 7:53 PM CDT	Severe Thunderstorm Watch	SPC	4 hr

The nearest sounding before it

Shreveport, LA (KSHV), launched 00:00Z, 2.0 hours before the alert went out and 30 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: 1155 J/kg
Mixed-layer CIN: -7 J/kg
Mixed-layer LCL: 2275 m above ground
0-6 km bulk shear: 11 kt
0-1 km storm-relative helicity: -21 m²/s²
0-3 km storm-relative helicity: 11 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.

000 
WUUS54 KSHV 170200
SVRSHV
LAC013-015-017-031-081-119-TXC203-315-365-170300-
/O.NEW.KSHV.SV.W.0252.090717T0200Z-090717T0300Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SHREVEPORT LA
900 PM CDT THU JUL 16 2009

THE NATIONAL WEATHER SERVICE IN SHREVEPORT HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  HARRISON COUNTY IN NORTHEAST TEXAS...
  THIS INCLUDES THE CITY OF MARSHALL...
  SOUTHWESTERN MARION COUNTY IN NORTHEAST TEXAS...
  NORTHERN PANOLA COUNTY IN NORTHEAST TEXAS...
  WESTERN BIENVILLE PARISH IN NORTHWEST LOUISIANA...
  SOUTHERN BOSSIER PARISH IN NORTHWEST LOUISIANA...
  THIS INCLUDES THE CITIES OF...RED CHUTE...BOSSIER CITY...
  CADDO PARISH IN NORTHWEST LOUISIANA...
  THIS INCLUDES THE CITY OF SHREVEPORT...
  NORTHERN DE SOTO PARISH IN NORTHWEST LOUISIANA...
  NORTHERN RED RIVER PARISH IN NORTHWEST LOUISIANA...
  SOUTHERN WEBSTER PARISH IN NORTHWEST LOUISIANA...
  THIS INCLUDES THE CITY OF MINDEN...

* UNTIL 1000 PM CDT

* AT 859 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
  LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING PENNY SIZE
  HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THESE STORMS WERE
  LOCATED ALONG A LINE EXTENDING FROM SIBLEY TO 10 MILES NORTHEAST OF
  STONEWALL TO MARSHALL...OR ALONG A LINE EXTENDING FROM 9 MILES
  SOUTHWEST OF MINDEN TO 10 MILES SOUTHEAST OF SHREVEPORT TO
  MARSHALL...AND MOVING SOUTHEAST AT 20 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  GREENWOOD...WASKOM...RINGGOLD...ELYSIAN FIELDS AND DEBERRY

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THESE ARE DANGEROUS STORMS. IF YOU ARE IN ITS PATH...PREPARE
IMMEDIATELY FOR DAMAGING WINDS...DESTRUCTIVE HAIL...AND DEADLY CLOUD
TO GROUND LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER...
PREFERABLY INSIDE A STRONG BUILDING BUT AWAY FROM WINDOWS.

THIS STORM HAS A HISTORY OF PRODUCING DESTRUCTIVE WINDS ACROSS NORTHERN 
CADDO PARISH. SEEK SHELTER NOW INSIDE A STURDY STRUCTURE AND STAY
AWAY FROM WINDOWS

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL MIDNIGHT CDT
FRIDAY MORNING FOR NORTHWESTERN LOUISIANA AND NORTHEAST TEXAS.

&&

LAT...LON 3275 9462 3270 9371 3271 9329 3226 9297
      3205 9348 3225 9448 3233 9450 3239 9448
      3239 9452
TIME...MOT...LOC 0159Z 324DEG 18KT 3251 9337 3235 9369
          3258 9430

$$

15

1 follow-up statement

000 
WWUS54 KSHV 170246
SVSSHV

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SHREVEPORT LA
946 PM CDT THU JUL 16 2009

TXC315-170255-
/O.CAN.KSHV.SV.W.0252.000000T0000Z-090717T0300Z/
MARION TX-
946 PM CDT THU JUL 16 2009

...THE SEVERE THUNDERSTORM WARNING FOR MARION COUNTY IS CANCELLED...

THE SEVERE THUNDERSTORMS HAVE MOVED OUT OF MARION COUNTY. THUS...THE 
SEVERE THUNDERSTORM WARNING HAS BEEN CANCELLED FOR MARION COUNTY.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL MIDNIGHT CDT 
FRIDAY MORNING FOR NORTHWESTERN LOUISIANA AND NORTHEAST TEXAS. 

LAT...LON 3261 9358 3271 9329 3226 9297 3205 9348
      3225 9448 3233 9450 3238 9448 3239 9452
      3265 9459
TIME...MOT...LOC 0245Z 324DEG 18KT 3232 9321 3216 9353
          3239 9414

$$

LAC013-015-017-031-081-119-TXC203-365-170300-
/O.CON.KSHV.SV.W.0252.000000T0000Z-090717T0300Z/
CADDO LA-BOSSIER LA-WEBSTER LA-BIENVILLE LA-DE SOTO LA-RED RIVER LA-
HARRISON TX-PANOLA TX-
946 PM CDT THU JUL 16 2009

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1000 PM CDT
FOR PANOLA AND HARRISON COUNTIES...AND RED RIVER...DE SOTO...
BIENVILLE...WEBSTER...BOSSIER AND CADDO PARISHES...

AT 945 PM CDT...A LINE OF SEVERE THUNDERSTORMS WAS REPORTED CAPABLE
OF PRODUCING DAMAGING WINDS IN EXCESS OF 60 MPH.  THESE STORMS WERE
LOCATED ALONG A LINE EXTENDING FROM JAMESTOWN TO WESTDALE TO ELYSIAN
FIELDS...OR ALONG A LINE EXTENDING FROM 20 MILES SOUTH OF MINDEN TO
13 MILES NORTHEAST OF MANSFIELD TO 16 MILES SOUTHEAST OF MARSHALL...
MOVING SOUTHEAST AT 20 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO SPRING
RIDGE...STONEWALL...WOODARDVILLE...GIDDENS...SPARTA...EAST POINT...
LOGGY BAYOU...CROSS ROADS...ABINGTON...DEBERRY...HALLS STORE...
CASTOR...MIDYETT...WOMACK...STONE...REEDS STORE...PRESTON...
METHVIN...LUCKY...KOLTER...KINGSTON...KICKAPOO...KEAT CHIE...HOLLY...
HALL SUMMIT...HALFWAY...GUYNES...GRAND BAYOU...GOSS...GLOSTER...FOUR
FORKS...CARMEL...ALBERTA...ROY AND CRICHTON

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THESE ARE DANGEROUS STORMS. IF YOU ARE IN THEIR PATH...PREPARE 
IMMEDIATELY FOR DAMAGING WINDS...AND DEADLY CLOUD TO GROUND 
LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER...PREFERABLY 
INSIDE A STRONG BUILDING BUT AWAY FROM WINDOWS.

THESE STORMS HAVE A HISTORY OF PRODUCING DESTRUCTIVE WINDS 
ACROSS CADDO AND BOSSIER PARISHES. SEEK SHELTER NOW INSIDE A STURDY 
STRUCTURE AND STAY AWAY FROM WINDOWS

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL MIDNIGHT CDT
FRIDAY MORNING FOR NORTHWESTERN LOUISIANA AND NORTHEAST TEXAS.

&&

LAT...LON 3261 9358 3271 9329 3226 9297 3205 9348
      3225 9448 3233 9450 3238 9448 3239 9452
      3265 9459
TIME...MOT...LOC 0245Z 324DEG 18KT 3232 9321 3216 9353
          3239 9414

$$

15

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 16, 7:41 PM CDT	Severe Thunderstorm Warning	SHV	Cass	49 min
Jul 16, 8:14 PM CDT	Severe Thunderstorm Warning	SHV	Harrison, Marion, Panola	46 min
Jul 16, 8:50 PM CDT	Flash Flood Warning	SHV	Harrison, Marion	3 hr
Jul 17, 5:42 AM CDT	Severe Thunderstorm Warning	SHV	Gregg, Harrison, Rusk, Smith, Upshur	38 min
Jul 17, 6:00 AM CDT	Severe Thunderstorm Warning	SHV	Gregg, Harrison, Marion, Panola, Rusk	45 min
Jul 17, 6:38 AM CDT	Areal Flood Advisory	SHV	Gregg, Harrison, Rusk, Upshur	3 hr
Jul 16, 7:19 PM CDT	Severe Thunderstorm Warning	SHV	Claiborne, Union	41 min
Jul 16, 7:56 PM CDT	Severe Thunderstorm Warning	SHV	Bienville, Claiborne, Jackson, Lincoln, Ouachita, Union and 1 more	64 min
Jul 16, 9:04 PM CDT	Severe Thunderstorm Warning	SHV	Caldwell, Jackson, Lincoln, Ouachita, Union	56 min

Nearby

Severe Thunderstorm Warnings in Louisiana, 2009 Severe Thunderstorm Warnings in Texas, 2009 Every severe thunderstorm warning in 2009

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.