Alert archive / Texas / Severe Thunderstorm Warnings in 2008

Severe Thunderstorm Warning 369, NWS Fort Worth, TX

July 30, 2008Denton County, Texas

NWS Fort Worth, TX issued this severe thunderstorm warning at Jul 30, 2008, 6:34 PM CDT for Denton County, Texas. It was in force for 41 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Jul 30, 2008, 6:34 PM CDT (23:34 UTC)
Expired
Jul 30, 2008, 7:15 PM CDT
In force
41 min
Issued by
NWS Fort Worth, TX
Area
Storm-based polygon

County Denton County, TX

The radar

The Dallas/Ft Worth radar (KFWS), 72 km from the middle of the area, began a volume at 23:37 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 nearest sounding before it

Fort Worth, TX (KFWD), launched 12:00Z, 11.6 hours before the alert went out and 45 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, Fort Worth, TX at 12:00Z on 2008-07-30Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 420 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, Fort Worth, TX at 12:00Z on 2008-07-30The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 3 square meters per square second.1939Sfc1 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
420 J/kg
Mixed-layer CIN
-154 J/kg
Mixed-layer LCL
1312 m above ground
0-6 km bulk shear
14 kt
0-1 km storm-relative helicity
3 m²/s²
0-3 km storm-relative helicity
65 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Fort Worth, TX wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 30, 6:16 PM CDT, 18 minutes earlier.

Area forecast discussion, Jul 30, 6:16 PM CDT, 18 minutes before
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Hazardous weather outlook, Jul 30, 5:25 PM CDT, 1 hour 9 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE FORT WORTH TX
525 PM CDT WED JUL 30 2008

TXZ091>095-100>107-115>123-129>135-141>148-156>162-174-175-311100-
MONTAGUE-COOKE-GRAYSON-FANNIN-LAMAR-YOUNG-JACK-WISE-DENTON-COLLIN-
HUNT-DELTA-HOPKINS-STEPHENS-PALO PINTO-PARKER-TARRANT-DALLAS-
ROCKWALL-KAUFMAN-VAN ZANDT-RAINS-EASTLAND-ERATH-HOOD-SOMERVELL-
JOHNSON-ELLIS-HENDERSON-COMANCHE-MILLS-HAMILTON-BOSQUE-HILL-NAVARRO-
FREESTONE-ANDERSON-LAMPASAS-CORYELL-BELL-MCLENNAN-FALLS-LIMESTONE-
LEON-MILAM-ROBERTSON-
525 PM CDT WED JUL 30 2008

THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTH TEXAS.

.DAY ONE...
A LINE OF STRONG THUNDERSTORMS WILL PUSH EAST AND SOUTHEAST ACROSS
MUCH OF NORTH TEXAS TONIGHT. THROUGH MID EVENING...SOME OF THE
STRONGER STORMS COULD BRIEFLY BECOME SEVERE AND PRODUCE LARGE HAIL
AND DAMAGING DOWNBURST WINDS. THE MOST LIKELY AREA FOR A SEVERE
THUNDERSTORM IS ALONG AND NORTH OF THE I-20 CORRIDOR. ALSO...VERY
HEAVY RAINFALL OVER ONE INCH IS POSSIBLE. AFTER MID EVENING...THE
LINE OF THUNDERSTORMS WILL CONTINUE TO PUSH EASTWARD AND STRONGER
THUNDERSTORMS ARE EXPECTED.

TO THE SOUTH OF I-20...THUNDERSTORM ACTIVITY SHOULD INCREASE OVER
THE SOUTHERN HALF OF NORTH TEXAS FROM MIDNIGHT ON.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY.

A BROKEN LINE OF THUNDERSTORMS WILL BE ONGOING THURSDAY MORNING EAST
OF INTERSTATE 35...WITH ISOLATED ACTIVITY FURTHER TO THE SOUTHWEST
NEAR LAMPASAS AND KILLEEN. WIDELY SCATTERED STORMS WILL REMAIN
POSSIBLE OVER FAR SOUTHERN AND EASTERN NORTH TEXAS THURSDAY
AFTERNOON...AS THE FRONT STALLS ACROSS THIS REGION. LIGHTNING AND
BRIEF DOWNPOURS ARE EXPECTED TO BE THE MAIN HAZARDS.

.SPOTTER INFORMATION STATEMENT...
LIMITED SPOTTER ACTIVATION MAY BE REQUESTED ACROSS THE NORTHWEST
HALF OF NORTH TEXAS THROUGH SUNSET.

05/

In the hours before

Special weather statement, Jul 30, 3:48 PM CDT, 2 hours 46 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE FORT WORTH TX
348 PM CDT WED JUL 30 2008

TXZ102-302115-
WISE TX-
348 PM CDT WED JUL 30 2008

...SIGNIFICANT WEATHER ADVISORY FOR...
  CENTRAL WISE COUNTY

AT 348 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
STRONG THUNDERSTORM 3 MILES NORTHWEST OF BRIDGEPORT...MOVING EAST AT
8 MPH.

CITIES IN THE PATH OF THIS STORM INCLUDE BRIDGEPORT.

FREQUENT CLOUD TO GROUND LIGHTNING...VERY HEAVY RAINFALL...PEA-SIZED
HAIL...AND WIND GUSTS TO 50 MPH CAN BE EXPECTED FROM THIS STORM.

LAT...LON 3328 9772 3320 9772 3320 9782 3325 9783
TIME...MOT...LOC 2048Z 269DEG 7KT 3322 9779

13
Special weather statement, Jul 30, 4:25 PM CDT, 2 hours 9 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE FORT WORTH TX
425 PM CDT WED JUL 30 2008

TXZ092-093-102-103-302200-
GRAYSON TX-COOKE TX-WISE TX-DENTON TX-
425 PM CDT WED JUL 30 2008

...SIGNIFICANT WEATHER ADVISORY FOR...
  SOUTHERN COOKE COUNTY
  NORTHWESTERN DENTON COUNTY
  NORTHERN GRAYSON COUNTY
  WISE COUNTY

AT 425 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED
STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM 14 MILES NORTHEAST
OF WHITESBORO TO 3 MILES SOUTH OF BRIDGEPORT...MOVING SOUTHEAST AT 16
MPH.

CITIES IN THE PATH OF THESE STORMS INCLUDE AURORA...BOYD...
BRIDGEPORT... CALLISBURG...COLLINSVILLE...DECATUR...DENISON...
GAINESVILLE...KNOLLWOOD...KRUM...POTTSBORO...SANGER...WHITESBORO AND
EISENHOWER STATE PARK.

FREQUENT CLOUD TO GROUND LIGHTNING...VERY HEAVY RAINFALL...PEA-SIZED
HAIL...AND WIND GUSTS TO 50 MPH CAN BE EXPECTED FROM THESE STORMS.

LAT...LON 3387 9660 3384 9659 3383 9655 3378 9648
      3300 9757 3314 9792 3344 9750 3343 9748
      3345 9748 3388 9687 3386 9685 3388 9680
      3385 9680 3384 9670 3391 9665
TIME...MOT...LOC 2125Z 293DEG 14KT 3383 9678 3316 9774

13
Special weather statement, Jul 30, 5:07 PM CDT, 1 hour 27 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE FORT WORTH TX
507 PM CDT WED JUL 30 2008

TXZ116-302230-
PALO PINTO TX-
507 PM CDT WED JUL 30 2008

...SIGNIFICANT WEATHER ADVISORY FOR...
  SOUTHERN PALO PINTO COUNTY

AT 507 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED
STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM 3 MILES EAST OF
MINERAL WELLS TO 15 MILES SOUTHWEST OF MINERAL WELLS TO 16 MILES
NORTHEAST OF RANGER...MOVING EAST AT 10 MPH.

CITIES IN THE PATH OF THESE STORMS INCLUDE MINERAL WELLS.

FREQUENT CLOUD TO GROUND LIGHTNING...VERY HEAVY RAINFALL...PEA-SIZED
HAIL...AND WIND GUSTS TO 50 MPH CAN BE EXPECTED FROM THESE STORMS.

LAT...LON 3269 9833 3287 9808 3285 9805 3284 9806
      3274 9806 3264 9819 3258 9846 3265 9853
TIME...MOT...LOC 2207Z 285DEG 9KT 3283 9802 3266 9826
          3262 9846

13
Special weather statement, Jul 30, 5:57 PM CDT, 37 minutes before
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Local storm report, Jul 30, 6:04 PM CDT, 30 minutes before
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Special weather statement, Jul 30, 6:04 PM CDT, 30 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Jul 30, 3:32 PM CDTSpecial Weather StatementFWDCooke28 min
Jul 30, 3:42 PM CDTSpecial Weather StatementFWDWise33 min
Jul 30, 3:48 PM CDTSpecial Weather StatementFWDWise27 min
Jul 30, 4:25 PM CDTSpecial Weather StatementFWDCooke, Wise35 min
Jul 30, 4:36 PM CDTSevere Thunderstorm WarningFWDJack, Wise54 min
Jul 30, 4:52 PM CDTSevere Thunderstorm WarningFWDCooke, Denton, Grayson53 min
Jul 30, 5:07 PM CDTSpecial Weather StatementFWDPalo Pinto23 min
Jul 30, 5:37 PM CDTSevere Thunderstorm WarningFWDParker, Tarrant53 min
Jul 30, 5:57 PM CDTSpecial Weather StatementFWDDenton33 min
Jul 30, 6:04 PM CDTSpecial Weather StatementFWDPalo Pinto26 min
Jul 30, 6:13 PM CDTSevere Thunderstorm WarningFWDEastland, Erath47 min
Jul 30, 6:36 PM CDTAreal Flood AdvisoryFWDDenton3 hr
Jul 30, 6:39 PM CDTSpecial Weather StatementFWDDallas, Johnson36 min
Jul 30, 6:57 PM CDTSpecial Weather StatementFWDEastland33 min

Nearby

Severe Thunderstorm Warnings in Texas, 2008Every 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.