Alert archive / Texas / Severe Thunderstorm Warnings in 2009

Severe Thunderstorm Warning 252, NWS Norman, OK

April 29, 2009Foard County, Hardeman County, Texas

NWS Norman, OK issued this severe thunderstorm warning at Apr 29, 2009, 8:04 PM CDT for Foard County, Hardeman County, Texas. It was in force for 56 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Apr 29, 2009, 8:04 PM CDT (01:04 UTC)
Expired
Apr 29, 2009, 9:00 PM CDT
In force
56 min
Issued by
NWS Norman, OK
Area
Storm-based polygon

Counties Foard County, TX, Hardeman County, TX

The radar

The Altus AFB radar (KFDR), 87 km from the middle of the area, began a volume at 01:07 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 watch it was issued in

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

IssuedProductOfficeLasted
Apr 29, 12:36 PM CDTTornado WatchSPC9 hr

The nearest sounding before it

Amarillo Airport, TX (KAMA), launched 00:00Z, 1.1 hours before the alert went out and 222 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, Amarillo Airport, TX at 00:00Z on 2009-04-30Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2227 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, Amarillo Airport, TX at 00:00Z on 2009-04-30The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 179 square meters per square second.193958Sfc1 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
2227 J/kg
Mixed-layer CIN
-29 J/kg
Mixed-layer LCL
1271 m above ground
0-6 km bulk shear
41 kt
0-1 km storm-relative helicity
179 m²/s²
0-3 km storm-relative helicity
254 m²/s²
Significant tornado parameter
1.7
Supercell composite
18.2

Open this sounding in Storm Lab

The text

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

000 
WUUS54 KOUN 300104
SVROUN
TXC155-197-300200-
/O.NEW.KOUN.SV.W.0252.090430T0104Z-090430T0200Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NORMAN OK
804 PM CDT WED APR 29 2009

THE NATIONAL WEATHER SERVICE IN NORMAN HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  FOARD COUNTY IN NORTHERN TEXAS...
  HARDEMAN COUNTY IN NORTHERN TEXAS...

* UNTIL 900 PM CDT

* AT 804 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 21 MILES SOUTHWEST OF GOODLETT...MOVING EAST AT
  25 MPH.

HAZARDS IN THE WARNING INCLUDE...
HAIL UP TO THE SIZE OF GOLF BALLS...
DESTRUCTIVE WIND GUSTS TO 75 MPH...

* LOCATIONS IN THE WARNING INCLUDE CHILLICOTHE...COPPER BREAKS STATE
  PARK...CROWELL...GOODLETT...MARGARET...MEDICINE MOUND...QUANAH AND
  THALIA.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEVERE THUNDERSTORMS CAN PRODUCE TORNADOES WITH NO ADVANCE WARNING.
MOVE IMMEDIATELY TO A STORM SHELTER... BASEMENT OR STURDY BUILDING IF
A TORNADO IS SIGHTED.

&&

LAT...LON 3424 10006 3424 10001 3434 10000 3437 9950
      3379 9950 3380 9963 3382 9964 3381 9967
      3382 9968 3381 9970 3382 9983 3383 9984
      3385 10006
TIME...MOT...LOC 0104Z 265DEG 19KT 3408 10008

$$
2 follow-up statements
000 
WWUS54 KOUN 300123
SVSOUN

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORMAN OK
823 PM CDT WED APR 29 2009

TXC155-197-300200-
/O.CON.KOUN.SV.W.0252.000000T0000Z-090430T0200Z/
HARDEMAN TX-FOARD TX-
823 PM CDT WED APR 29 2009

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 900 PM CDT
FOR FOARD AND SOUTHERN HARDEMAN COUNTIES...

AT 823 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR DETECTED A 
SEVERE THUNDERSTORM 15 MILES WEST OF CROWELL...MOVING SOUTHEAST AT 
20 MPH.

HAZARDS IN THE WARNING INCLUDE...
HAIL UP TO THE SIZE OF GOLF BALLS...
DESTRUCTIVE WIND GUSTS TO 75 MPH...

* LOCATIONS IN THE WARNING INCLUDE COPPER BREAKS STATE PARK...
  CROWELL...GOODLETT...MARGARET...MEDICINE MOUND...QUANAH AND THALIA.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEVERE THUNDERSTORMS CAN PRODUCE TORNADOES WITH NO ADVANCE WARNING.
MOVE IMMEDIATELY TO A STORM SHELTER... BASEMENT OR STURDY BUILDING IF
A TORNADO IS SIGHTED.

&&

LAT...LON 3423 10006 3424 10001 3434 10000 3433 9952
      3379 9950 3380 9962 3382 9964 3381 9967
      3382 9970 3381 9970 3382 9983 3383 9984
      3385 10006
TIME...MOT...LOC 0123Z 284DEG 18KT 3402 9998

$$
000 
WWUS54 KOUN 300142
SVSOUN

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORMAN OK
842 PM CDT WED APR 29 2009

TXC155-197-300200-
/O.CON.KOUN.SV.W.0252.000000T0000Z-090430T0200Z/
HARDEMAN TX-FOARD TX-
842 PM CDT WED APR 29 2009

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 900 PM CDT
FOR FOARD AND SOUTHERN HARDEMAN COUNTIES...

AT 842 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR DETECTED
SEVERE THUNDERSTORMS ALONG A LINE EXTENDING FROM 14 MILES NORTHWEST
OF CROWELL TO 10 MILES WEST OF CROWELL TO 15 MILES SOUTHWEST OF
CROWELL...MOVING EAST AT 20 MPH.

HAZARDS IN THE WARNING INCLUDE...
HAIL UP TO THE SIZE OF HALF DOLLARS...
WIND GUSTS TO 65 MPH...

* LOCATIONS IN THE WARNING INCLUDE COPPER BREAKS STATE PARK...
  CROWELL...MARGARET...MEDICINE MOUND...QUANAH AND THALIA.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEVERE THUNDERSTORMS CAN PRODUCE TORNADOES WITH NO ADVANCE WARNING.
MOVE IMMEDIATELY TO A STORM SHELTER... BASEMENT OR STURDY BUILDING IF
A TORNADO IS SIGHTED.

&&

LAT...LON 3423 10006 3424 10001 3434 10000 3433 9952
      3379 9950 3380 9962 3382 9964 3381 9967
      3382 9970 3381 9970 3382 9983 3383 9984
      3385 10006
TIME...MOT...LOC 0142Z 287DEG 17KT 3409 9992 3396 9988
          3383 9991

$$

The office that day

Everything else NWS Norman, OK issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Apr 29, 8:37 PM CDTRiver Flood WarningOUNCooke4 days
Apr 29, 8:55 PM CDTSevere Thunderstorm WarningOUNBaylor, Foard, Knox, Wilbarger50 min
Apr 29, 9:05 PM CDTSevere Thunderstorm WarningOUNWichita40 min
Apr 29, 9:21 PM CDTAreal Flood WarningOUNClay6 hr
Apr 29, 9:40 PM CDTSevere Thunderstorm WarningOUNBaylor, Foard, Hardeman, Knox, Wichita, Wilbarger65 min
Apr 29, 9:45 PM CDTSevere Thunderstorm WarningOUNHardeman, Wilbarger60 min
Apr 29, 10:37 PM CDTSevere Thunderstorm WarningOUNArcher, Baylor, Clay, Wichita, Wilbarger53 min
Apr 29, 10:44 PM CDTSevere Thunderstorm WarningOUNBaylor, Knox46 min
Apr 29, 11:27 PM CDTSevere Thunderstorm WarningOUNArcher, Clay, Wichita63 min
Apr 29, 11:28 PM CDTSevere Thunderstorm WarningOUNBaylor62 min
Apr 30, 12:10 AM CDTAreal Flood AdvisoryOUNArcher, Clay3 hr
Apr 30, 12:38 AM CDTAreal Flood AdvisoryOUNFoard, Hardeman, Wilbarger112 min
Apr 30, 12:54 AM CDTSevere Thunderstorm WarningOUNFoard, Hardeman, Wilbarger66 min
Apr 30, 1:58 AM CDTSevere Thunderstorm WarningOUNArcher, Wichita, Wilbarger62 min
Apr 30, 2:49 AM CDTSevere Thunderstorm WarningOUNArcher, Baylor, Wichita, Wilbarger71 min
Apr 30, 2:11 PM CDTRiver Flood WarningOUNClay, Wichita44 hr
Apr 30, 3:14 PM CDTFlash Flood WatchOUNArcher, Baylor, Clay, Foard, Hardeman, Knox and 2 more61 hr

Nearby

Severe Thunderstorm Warnings in Texas, 2009Every 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.