Alert archive / Arkansas / Tornado Warnings in 2009

Tornado Warning 21, NWS Shreveport, LA

April 9, 2009Cass County, Texas; Lafayette County, Miller County, Arkansas

NWS Shreveport, LA issued this tornado warning at Apr 9, 2009, 8:44 PM CDT for Cass County, Texas; Lafayette County, Miller County, Arkansas. It was in force for 46 min. 3 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, 2009, 8:44 PM CDT (01:44 UTC)
Expired
Apr 9, 2009, 9:30 PM CDT
In force
46 min
Issued by
NWS Shreveport, LA
Area
Storm-based polygon

Counties Lafayette County, AR, Miller County, AR, Cass County, TX

The radar

The Shreveport radar (KSHV), 91 km from the middle of the area, began a volume at 01:45 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

TimeReportWhereRemark
Apr 9, 8:51 PM CDTTORNADO5 Nnw Rodessa, ARA NATIONAL WEATHER SERVICE STORM SURVEY FOUND AN EF3 TORNADO...WITH MAXIMUM WINDS OF 135 MPH. THE TRACK LENGTH WAS APPROXIMATELY 10 MILES...WITH A WIDTH OF 0.5 MILE AT ITS WIDEST POINT. ALONG ITS TRACK...THE TORNADO UPROOTED OR SNAPPED NUMEROUS TREES AND POWER
Apr 9, 8:53 PM CDTTORNADO11 Ese Atlanta, AREM REPORTS OIL RIG TURNED UPSIDE DOWN
Apr 9, 9:05 PM CDTHAIL 0.755 W Bradley, AR

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

The nearest sounding before it

Shreveport, LA (KSHV), launched 00:00Z, 1.7 hours before the alert went out and 89 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-pSkew-T log-p diagram, Shreveport, LA at 00:00Z on 2009-04-10Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 938 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Shreveport, LA at 00:00Z on 2009-04-10The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 370 square meters per square second.1939587897Sfc1 km3 km6 km9 kmRMLM
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
938 J/kg
Mixed-layer CIN
-186 J/kg
Mixed-layer LCL
814 m above ground
0-6 km bulk shear
52 kt
0-1 km storm-relative helicity
370 m²/s²
0-3 km storm-relative helicity
290 m²/s²
Significant tornado parameter
0.2
Supercell composite
4.5

Open this sounding in Storm Lab

The text

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

000 
WFUS54 KSHV 100144
TORSHV
ARC073-091-TXC067-100230-
/O.NEW.KSHV.TO.W.0021.090410T0144Z-090410T0230Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE SHREVEPORT LA
844 PM CDT THU APR 9 2009

THE NATIONAL WEATHER SERVICE IN SHREVEPORT HAS ISSUED A

* TORNADO WARNING FOR...
  NORTHEASTERN CASS COUNTY IN NORTHEAST TEXAS...
  WESTERN LAFAYETTE COUNTY IN SOUTHWEST ARKANSAS...
  SOUTHERN MILLER COUNTY IN SOUTHWEST ARKANSAS...

* UNTIL 930 PM CDT

* AT 843 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING
  A TORNADO NEAR RAVANNA...OR NEAR ATLANTA...MOVING EAST AT 50 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  BRIGHTSTAR...DODDRIDGE...FOUKE AND GARLAND

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS IS AN EXTREMELY DANGEROUS AND LIFE THREATENING SITUATION. THIS
STORM IS CAPABLE OF PRODUCING STRONG TO VIOLENT TORNADOES. IF YOU ARE
IN THE PATH OF THIS TORNADO...TAKE COVER IMMEDIATELY

&&

LAT...LON 3344 9367 3303 9367 3302 9415 3327 9417
      3330 9407 3328 9405 3331 9404
TIME...MOT...LOC 0144Z 251DEG 44KT 3309 9406

$$

03

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 9, 7:21 PM CDTTornado WarningSHVCamp, Morris, Titus39 min
Apr 9, 7:46 PM CDTTornado WarningSHVBowie, Cass59 min
Apr 9, 7:53 PM CDTSevere Thunderstorm WarningSHVGregg, Harrison52 min
Apr 9, 8:26 PM CDTSevere Thunderstorm WarningSHVCamp, Cass, Marion, Morris, Titus, Upshur and 1 more49 min
Apr 9, 8:53 PM CDTTornado WarningSHVGregg, Harrison, Marion, Upshur52 min
Apr 9, 9:02 PM CDTSevere Thunderstorm WarningSHVCass43 min
Apr 9, 9:34 PM CDTTornado WarningSHVHarrison, Marion31 min
Apr 9, 9:37 PM CDTSevere Thunderstorm WarningSHVCass38 min
Apr 9, 9:58 PM CDTTornado WarningSHVHarrison47 min
Apr 9, 8:07 PM CDTSevere Thunderstorm WarningSHVHoward, Sevier38 min
Apr 9, 8:10 PM CDTTornado WarningSHVSevier35 min
Apr 9, 8:16 PM CDTSevere Thunderstorm WarningSHVHempstead, Howard, Little River, Sevier44 min
Apr 9, 8:34 PM CDTTornado WarningSHVHoward41 min
Apr 9, 9:14 PM CDTSevere Thunderstorm WarningSHVColumbia, Lafayette, Miller46 min
Apr 9, 9:30 PM CDTTornado WarningSHVColumbia, Lafayette45 min
Apr 9, 9:50 PM CDTTornado WarningSHVLafayette, Miller39 min
Apr 9, 9:54 PM CDTTornado WarningSHVColumbia, Lafayette51 min
Apr 9, 10:13 PM CDTTornado WarningSHVColumbia, Lafayette47 min
Apr 9, 10:22 PM CDTSevere Thunderstorm WarningSHVColumbia, Union53 min
Apr 9, 10:39 PM CDTTornado WarningSHVUnion66 min

Nearby

Tornado Warnings in Arkansas, 2009Tornado Warnings in Texas, 2009Every tornado warning in 2009Tornadoes 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.