Alert archive / Texas / Severe Thunderstorm Warnings in 2008

Severe Thunderstorm Warning 21, NWS Fort Worth, TX

February 12, 20084 counties in Texas

NWS Fort Worth, TX issued this severe thunderstorm warning at Feb 12, 2008, 5:14 AM CST for 4 counties in Texas. It was in force for 61 min. 2 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: Feb 12, 2008, 5:14 AM CST (11:14 UTC)
Expired: Feb 12, 2008, 6:15 AM CST
In force: 61 min
Issued by: NWS Fort Worth, TX
Area: Storm-based polygon

Counties Anderson County, TX, Freestone County, TX, Henderson County, TX, Navarro County, TX

The radar

The Dallas/Ft Worth radar (KFWS), 131 km from the middle of the area, began a volume at 11:15 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
Feb 12, 5:35 AM CST	TSTM WND GST 69	16 Nne Fairfield, TX	RECORDED 69 MPH WIND GUST ON RICHLAND CHAMBERS RESERVOIR DAM
Feb 12, 5:48 AM CST	TSTM WND DMG	Athens, TX	LARGE TREE PARTIALLY UPROOTED. NUMEROUS SHINGLES OFF WEST SIDE OF HOUSE. WINDS ESTIMATED 60 - 70 MPH.

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

The nearest sounding before it

Fort Worth, TX (KFWD), launched 00:00Z, 11.2 hours before the alert went out and 146 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: 549 J/kg
Mixed-layer CIN: -97 J/kg
Mixed-layer LCL: 1103 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: 180 m²/s²
0-3 km storm-relative helicity: 245 m²/s²
Significant tornado parameter: 0.3
Supercell composite: 1.6

Open this sounding in Storm Lab

The text

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

000 
WUUS54 KFWD 121114
SVRFWD
TXC001-161-213-349-121215-
/O.NEW.KFWD.SV.W.0021.080212T1114Z-080212T1215Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE FORT WORTH TX
514 AM CST TUE FEB 12 2008

THE NATIONAL WEATHER SERVICE IN FORT WORTH HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHERN FREESTONE COUNTY IN NORTH CENTRAL TEXAS...
  NAVARRO COUNTY IN NORTH CENTRAL TEXAS...
  NORTHERN ANDERSON COUNTY IN NORTHEAST TEXAS...
  HENDERSON COUNTY IN NORTHEAST TEXAS...

* UNTIL 615 AM CST

* AT 514 AM CST...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
  LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING NICKEL SIZE
  HAIL...AND DESTRUCTIVE WINDS IN EXCESS OF 70 MPH.  THESE STORMS
  WERE LOCATED ALONG A LINE EXTENDING FROM 6 MILES WEST OF SEVEN
  POINTS TO ANGUS TO DAWSON...OR ALONG A LINE EXTENDING FROM 10 MILES
  WEST OF GUN BARREL CITY TO CORSICANA TO 20 MILES EAST OF
  HILLSBORO...AND MOVING EAST AT 50 MPH.

* SEVERE THUNDERSTORMS WILL BE NEAR...
  TOOL...NAVARRO AND ANGUS BY 520 AM
  GUN BARREL CITY...KERENS AND ENCHANTED OAKS BY 525 AM
  CANEY CITY...TRINIDAD AND EUSTACE BY 530 AM
  MALAKOFF BY 535 AM

FOR YOUR PROTECTION MOVE TO A STURDY SHELTER UNTIL THE STORM HAS
PASSED.

IF YOU ARE CAUGHT OUTSIDE...SEEK SHELTER IN A STRONG BUILDING AND
STAY INSIDE...AWAY FROM WINDOWS UNTIL THE STORM HAS PASSED.

LAT...LON 3183 9672 3193 9680 3206 9644 3236 9630
      3236 9544 3215 9546 3209 9542 3193 9543
      3178 9587
TIME...MOT...LOC 1114Z 274DEG 45KT 3236 9625 3206 9638
          3191 9672

$$

2 follow-up statements

000 
WWUS54 KFWD 121146
SVSFWD

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE FORT WORTH TX
546 AM CST TUE FEB 12 2008

TXC001-161-213-349-121215-
/O.CON.KFWD.SV.W.0021.000000T0000Z-080212T1215Z/
HENDERSON TX-NAVARRO TX-ANDERSON TX-FREESTONE TX-
546 AM CST TUE FEB 12 2008

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 615 AM CST
FOR NORTHERN FREESTONE...NORTHERN ANDERSON...SOUTHERN NAVARRO AND
HENDERSON COUNTIES...

AT 546 AM CST...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 8 MILES EAST OF EUSTACE TO 9 MILES
SOUTHEAST OF TRINIDAD TO STREETMAN...OR ALONG A LINE EXTENDING FROM 9
MILES NORTH OF ATHENS TO 15 MILES SOUTHWEST OF ATHENS TO 15 MILES
SOUTHEAST OF CORSICANA...MOVING EAST AT 50 MPH.

SEVERE THUNDERSTORMS WILL BE NEAR...
  BROWNSBORO BY 555 AM CST...
  POYNOR...MOORE STATION AND CHANDLER BY 605 AM CST...
  FRANKSTON...COFFEE CITY AND BERRYVILLE BY 610 AM CST...

LAT...LON 3183 9672 3194 9677 3206 9646 3208 9634
      3235 9602 3236 9544 3215 9546 3209 9542
      3193 9544 3178 9587
TIME...MOT...LOC 1146Z 274DEG 45KT 3233 9577 3203 9591
          3188 9625

$$

000 
WWUS54 KFWD 121210
SVSFWD

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE FORT WORTH TX
610 AM CST TUE FEB 12 2008

TXC001-161-213-349-121220-
/O.EXP.KFWD.SV.W.0021.000000T0000Z-080212T1215Z/
HENDERSON TX-NAVARRO TX-ANDERSON TX-FREESTONE TX-
610 AM CST TUE FEB 12 2008

...THE SEVERE THUNDERSTORM WARNING FOR NORTHERN FREESTONE...NORTHERN
ANDERSON...SOUTHERN NAVARRO AND HENDERSON COUNTIES EXPIRES AT 615 AM
CST...

AT 610 AM CST THE SEVERE THUNDERSTORM THAT PROMPTED THE WARNING
WEAKENED AND WAS NO LONGER SEVERE.

RADAR INDICATED THAT HEAVY RAIN...SMALL HAIL...AND GUSTY WINDS WERE
STILL POSSIBLE FROM THE THUNDERSTORM.

LAT...LON 3183 9672 3194 9677 3206 9646 3208 9634
      3235 9602 3236 9544 3215 9546 3209 9542
      3193 9544 3178 9587
TIME...MOT...LOC 1210Z 274DEG 45KT 3229 9541 3199 9556
          3184 9590

$$

The office that day

Everything else NWS Fort Worth, TX issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Feb 11, 9:13 PM CST	Special Weather Statement	FWD	Lamar	32 min
Feb 11, 10:53 PM CST	Special Weather Statement	FWD	Cooke	37 min
Feb 11, 11:00 PM CST	Severe Thunderstorm Warning	FWD	Cooke, Montague, Wise	45 min
Feb 12, 12:09 AM CST	Special Weather Statement	FWD	Grayson	36 min
Feb 12, 12:59 AM CST	Special Weather Statement	FWD	Denton	31 min
Feb 12, 1:35 AM CST	Special Weather Statement	FWD	Denton	25 min
Feb 12, 1:44 AM CST	Severe Thunderstorm Warning	FWD	Denton	16 min
Feb 12, 2:22 AM CST	Severe Thunderstorm Warning	FWD	Dallas	38 min
Feb 12, 3:19 AM CST	Special Weather Statement	FWD	Erath	26 min
Feb 12, 4:28 AM CST	Special Weather Statement	FWD	Ellis	32 min
Feb 12, 4:36 AM CST	Severe Thunderstorm Warning	FWD	Ellis, Hill, Navarro	39 min
Feb 12, 5:29 AM CST	Special Weather Statement	FWD	Lampasas	31 min
Feb 12, 5:33 AM CST	Severe Thunderstorm Warning	FWD	Lampasas	57 min
Feb 12, 6:12 AM CST	Special Weather Statement	FWD	Freestone, Limestone	33 min
Feb 12, 6:16 AM CST	Special Weather Statement	FWD	Coryell	29 min
Feb 12, 6:30 AM CST	Special Weather Statement	FWD	Falls	30 min
Feb 12, 6:46 AM CST	Special Weather Statement	FWD	Freestone, Leon	59 min
Feb 12, 7:01 AM CST	Special Weather Statement	FWD	Bell, Falls, Milam, Robertson	59 min

Nearby

Severe Thunderstorm Warnings in Texas, 2008 Every severe thunderstorm warning in 2008

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.