Alert archive / Texas / Severe Thunderstorm Warnings in 2015

Severe Thunderstorm Warning 21, NWS Shreveport, LA

April 9, 20157 counties in Texas

NWS Shreveport, LA issued this severe thunderstorm warning at Apr 9, 2015, 4:51 PM CDT for 7 counties in Texas. It was in force for 54 min. 5 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: Apr 9, 2015, 4:51 PM CDT (21:51 UTC)
Expired: Apr 9, 2015, 5:45 PM CDT
In force: 54 min
Issued by: NWS Shreveport, LA
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Camp County, TX, Gregg County, TX, Harrison County, TX, Marion County, TX, Smith County, TX, Upshur County, TX, Wood County, TX

The radar

The Shreveport radar (KSHV), 108 km from the middle of the area, began a volume at 21:52 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
Apr 9, 5:00 PM CDT	TSTM WND DMG	6 Ese Lindale, TX	NUMEROUS TREES DOWN
Apr 9, 5:00 PM CDT	TSTM WND DMG	7 Ne Big Sandy, TX	NUMEROUS TREES REPORTED DOWN ON FM 1404
Apr 9, 5:26 PM CDT	TSTM WND DMG	7 Nw Ore City, TX	SEVERAL TREES DOWN
Apr 9, 5:33 PM CDT	TSTM WND DMG	12 Sw Pittsburg, TX	SEVERAL TREES DOWN ON FM 2088
Apr 9, 5:36 PM CDT	TSTM WND DMG	5 Wsw Lone Star, TX	TRESS DOWN

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
Apr 9, 3:06 PM CDT	Tornado Watch	SPC	7 hr

The nearest sounding before it

Shreveport, LA (KBAD), launched 12:00Z, 9.9 hours before the alert went out and 115 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: 641 J/kg
Mixed-layer CIN: -116 J/kg
Mixed-layer LCL: 674 m above ground
0-6 km bulk shear: 31 kt
0-1 km storm-relative helicity: 207 m²/s²
0-3 km storm-relative helicity: 244 m²/s²
Significant tornado parameter: 0.3
Supercell composite: 4.1

Open this sounding in Storm Lab

The text

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

064 
WUUS54 KSHV 092151
SVRSHV
TXC063-183-203-315-423-459-499-092245-
/O.NEW.KSHV.SV.W.0021.150409T2151Z-150409T2245Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SHREVEPORT LA
451 PM CDT THU APR 9 2015

THE NATIONAL WEATHER SERVICE IN SHREVEPORT HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHWESTERN HARRISON COUNTY IN NORTHEASTERN TEXAS...
  SOUTHWESTERN CAMP COUNTY IN NORTHEASTERN TEXAS...
  UPSHUR COUNTY IN NORTHEASTERN TEXAS...
  SOUTHEASTERN WOOD COUNTY IN NORTHEASTERN TEXAS...
  NORTHERN SMITH COUNTY IN NORTHEASTERN TEXAS...
  NORTHWESTERN MARION COUNTY IN NORTHEASTERN TEXAS...
  GREGG COUNTY IN NORTHEASTERN TEXAS...

* UNTIL 545 PM CDT

* AT 451 PM CDT...SEVERE THUNDERSTORMS WERE LOCATED ALONG A LINE
  EXTENDING FROM LINDALE TO NEAR HAWKINS TO NEAR BIG SANDY TO EAST
  MOUNTAIN...MOVING NORTHEAST AT 35 MPH.

  HAZARD...60 MPH WIND GUSTS. 

  SOURCE...RADAR INDICATED. 

  IMPACT...EXPECT DAMAGE TO ROOFS...SIDING AND TREES. 

* LOCATIONS IMPACTED INCLUDE...
  LONGVIEW...WHITE OAK...GLADEWATER...GILMER...LINDALE...BIG SANDY...
  HAWKINS...ORE CITY...CLARKSVILLE CITY...EAST MOUNTAIN...CEDAR
  SPRINGS...DIANA...WEST MOUNTAIN...ROSEWOOD...LIBERTY CITY...
  WINONA...UNION GROVE...WARREN CITY...MIDWAY AND BETTIE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A TORNADO WATCH REMAINS IN EFFECT FOR THE WARNED AREA. TORNADOES CAN
DEVELOP QUICKLY FROM SEVERE THUNDERSTORMS. ALTHOUGH A TORNADO IS NOT
IMMEDIATELY LIKELY...IF ONE IS SPOTTED...ACT QUICKLY AND MOVE TO A
PLACE OF SAFETY INSIDE A STURDY STRUCTURE...SUCH AS A BASEMENT OR
SMALL INTERIOR ROOM.

FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.

&&

A TORNADO WATCH REMAINS IN EFFECT UNTIL 1000 PM CDT FOR NORTHEASTERN
TEXAS.

LAT...LON 3300 9504 3292 9478 3287 9471 3286 9449
      3246 9475 3239 9513 3249 9553
TIME...MOT...LOC 2151Z 220DEG 31KT 3250 9539 3260 9525 3255 9508 3257
9484

HAIL...<.75IN
WIND...60MPH
 
$$

15

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 9, 5:00 AM CDT	Lake Wind Advisory	SHV	Camp, Cherokee, Franklin, Gregg, Morris, Red River and 5 more	14 hr
Apr 9, 2:57 PM CDT	Special Weather Statement	SHV	Camp, Upshur, Wood	63 min
Apr 9, 3:38 PM CDT	Severe Thunderstorm Warning	SHV	Bowie, Cass	37 min
Apr 9, 3:56 PM CDT	Severe Thunderstorm Warning	SHV	Cass	34 min
Apr 9, 4:20 PM CDT	Severe Thunderstorm Warning	SHV	Cass	25 min
Apr 9, 4:20 PM CDT	Severe Thunderstorm Warning	SHV	Bowie, Cass	40 min
Apr 9, 4:32 PM CDT	Severe Thunderstorm Warning	SHV	Bowie	28 min
Apr 9, 4:34 PM CDT	Severe Thunderstorm Warning	SHV	Bowie	26 min
Apr 9, 4:36 PM CDT	Special Weather Statement	SHV	Smith, Upshur	39 min
Apr 9, 5:26 PM CDT	Severe Thunderstorm Warning	SHV	Cass, Harrison, Marion	49 min
Apr 9, 5:31 PM CDT	Severe Thunderstorm Warning	SHV	Camp, Cass, Harrison, Marion, Morris, Titus and 1 more	59 min
Apr 9, 5:56 PM CDT	Special Weather Statement	SHV	Smith	49 min
Apr 9, 6:10 PM CDT	Severe Thunderstorm Warning	SHV	Cherokee, Smith	65 min
Apr 9, 6:30 PM CDT	Tornado Warning	SHV	Cherokee, Smith	60 min

Nearby

Severe Thunderstorm Warnings in Texas, 2015 Every severe thunderstorm warning in 2015

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.