Alert archive / Texas / Severe Thunderstorm Warnings in 2007

Severe Thunderstorm Warning 37, NWS Fort Worth, TX

April 3, 2007Hamilton County, Texas

NWS Fort Worth, TX issued this severe thunderstorm warning at Apr 3, 2007, 6:30 PM CDT for Hamilton County, Texas. It was in force for 60 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: Apr 3, 2007, 6:30 PM CDT (23:30 UTC)
Expired: Apr 3, 2007, 7:30 PM CDT
In force: 60 min
Issued by: NWS Fort Worth, TX
Area: Counties, with a storm outline in the text

County Hamilton County, TX

The radar

The Dallas/Ft Worth radar (KFWS), 123 km from the middle of the area, began a volume at 23:32 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.

Issued	Product	Office	Lasted
Apr 3, 5:47 PM CDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Fort Worth, TX (KFWD), launched 12:00Z, 11.5 hours before the alert went out and 147 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: 1056 J/kg
Mixed-layer CIN: -363 J/kg
Mixed-layer LCL: 1095 m above ground
0-6 km bulk shear: 12 kt
0-1 km storm-relative helicity: 134 m²/s²
0-3 km storm-relative helicity: 264 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 Apr 3, 6:03 PM CDT, 27 minutes earlier.

Area forecast discussion, Apr 3, 6:03 PM CDT, 27 minutes before

AREA FORECAST DISCUSSION...UPDATED
NATIONAL WEATHER SERVICE FORT WORTH TX
603 PM CDT TUE APR 3 2007

.UPDATE...
SHOWERS AND THUNDERSTORMS ARE FORMING FROM PLANO...THROUGH
HAMILTON... TO FREDERICKSBURG. HAVE UPDATED THE FORECAST TO
INCLUDE SEVERE THUNDERSTORM WATCH 116.  #58

&&

.PREV DISCUSSION... /ISSUED 526 PM CDT TUE APR 3 2007/

AVIATION...
BUBBLING CU INDICATE CONVECTION SHOULD DEVELOP ANY TIME NOW. HAVE
LEFT ANY RA/TS MENTION OUT OF METROPLEX...BUT WILL WATCH THIS
CLOSELY AS THE EVENING EVOLVES. BETTER BET FOR TSRA WILL BE AT
WACO BETWEEN 05 AND 12Z AS SQUALL LINE DEVELOPS ALONG COLD FRONT.
WIND SHIFT WILL COME THRU METROPLEX TAF SITES SOON...BUT GUSTY
NE WINDS WILL ARRIVE A LITTLE LATER...AROUND 05Z. GUSTY WINDS
SHOULD CONTINUE BEFORE DYING DOWN TOMORROW MIDDAY. BKN-OVC VFR
EXPECTED FOR MUCH OF THE PERIOD...BUT SHOULD BEGIN TO BREAK UP
TOMORROW MIDDAY AS WELL.  /13

PREV DISCUSSION... /ISSUED 343 PM CDT TUE APR 3 2007/

DISCUSSION...

AFTERNOON SOUNDING CONTINUES TO INDICATE THE POTENTIAL FOR SEVERE
THUNDERSTORMS THIS EVENING. IF THE CAP IS BROKEN...THERE IS
AMPLE ENERGY AND INSTABILITY ALOFT TO SUPPORT SEVERE THUNDERSTORMS ALONG THE
COLD FRONT THIS EVENING. FORECASTED HIGHER POPS IN THE SOUTHEAST
PORTIONS OF CWA THROUGH TONIGHT AS THE FRONT TAPS INTO THE
MOISTURE. ANTICIPATE SOME SHOWERS AND THUNDERSTORMS TO LINGER
THROUGH TOMORROW MORNING BEFORE THE SYSTEM PUSHES SOUTH OF THE
REGION.

MODELS WERE IN GOOD AGREEMENT REGARDING TEMPERATURES THROUGH THE
PERIOD. I AGREE WITH COOLING TREND AS WINDS QUICKLY PICK UP OUT OF
THE NORTH AFTER FROPA. CONDITIONS WILL BE DRY FOR A FEW DAYS...BUT
ANOTHER SYSTEM IS EXPECTED TO DEVELOP ALONG THE COAST OF
CALIFORNIA AND MAKE ITS WAY THROUGH THE DESERT SOUTHWEST LATER IN
THE WEEK. ISENTROPIC LIFT EXPECTED TO INCREASE BY THE END OF THE
WEEK...SO WILL HAVE 20 TO 30 POPS IN FORECAST ON FRIDAY AND
SATURDAY. WILL CONTINUE TO MONITOR THROUGH THE WEEK DUE TO SOME
DISAGREEMENT IN MODELS TOWARD END OF THE WEEK.

TEMPERATURES WEDNESDAY THROUGH THE END OF THE WEEK WILL BE 10 TO
15 DEGREES BELOW NORMAL WITH A WARM UP EXPECTED OVER THE WEEKEND.

&&

.PRELIMINARY POINT TEMPS/POPS...
DALLAS-FT. WORTH, TX  52  65  47  62  44 /  30  10  10  10  20
WACO, TX              57  67  49  66  47 /  40  20  10  10  20
PARIS, TX             49  64  45  61  43 /  40  10  10  10  30
DENTON, TX            51  65  46  62  42 /  20  10  10  10  20
MCKINNEY, TX          51  66  46  62  43 /  30  10  10  10  20
DALLAS, TX            52  65  47  62  45 /  30  10  10  10  20
TERRELL, TX           54  66  47  64  46 /  40  10  10  10  20
CORSICANA, TX         57  67  49  65  46 /  40  20  10  10  20
TEMPLE, TX            57  68  51  66  49 /  40  20  10  10  20

&&

.FWD WATCHES/WARNINGS/ADVISORIES...
NONE.
&&

13/58

Hazardous weather outlook, Apr 3, 2:45 PM CDT, 3 hours 45 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE FORT WORTH TX
245 PM CDT TUE APR 3 2007

TXZ091>095-100>107-115>123-129>135-141>148-156>162-174-175-041200-
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-
245 PM CDT TUE APR 3 2007

THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTH TEXAS.

.DAY ONE...THROUGH TONIGHT
THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS WITH LARGE HAIL AND
DAMAGING WINDS AFTER 5 PM...GENERALLY SOUTHEAST OF A HAMILTON...
WEATHERFORD...DENTON...SHERMAN-DENISON LINE. ACTIVITY SHOULD BE
MAINLY ISOLATED IN NATURE INITIALLY...DUE TO A CAPPING INVERSION
ALOFT THAT IS SLOWLY WEAKENING WITH DAYTIME HEATING THIS AFTERNOON.
WITH A VERY UNSTABLE ENVIRONMENT IN PLACE AHEAD OF A STRONG COLD
FRONT...ANY ISOLATED TO SCATTERED STORMS THAT DO DEVELOP WOULD LIKELY
BECOME SEVERE IN A VERY SHORT PERIOD OF TIME. BEST COVERAGE OF STORMS
APPEARS TO BE ALONG AND EAST OF INTERSTATE 35...WHERE DEEPER MOISTURE
AND BETTER LIFT WILL EXIST.

BY MIDNIGHT AND AFTER...BEST CHANCES FOR SEVERE STORMS WILL BE
OVER SOUTHERN PORTIONS OF THE AREA...AS THE COLD FRONT MOVES
THROUGH. GUSTY NORTH AND NORTHEAST WINDS BETWEEN 15 TO 25 MPH
BEHIND THE FRONT WILL LIKELY MAKE AREA LAKES VERY CHOPPY ON OPEN
WATERS AND CAUSE CROSSWIND PROBLEMS ON EAST TO WEST ROADWAYS.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY
THUNDERSTORMS CHANCES WILL CONTINUE WEDNESDAY MORNING SOUTH OF A
LAMPASAS...WACO...ATHENS LINE...BUT THE SEVERE THREAT SHOULD BE
VERY MINIMAL AS INSTABILITY IS LOST.

ANOTHER STORM SYSTEM WILL ARRIVE THURSDAY NIGHT INTO FRIDAY...
BRINGING A CHANCE OF THUNDERSTORMS AHEAD OF ANOTHER COLD FRONT.
AT THIS TIME...THE SEVERE WEATHER RISK LOOKS MINIMAL DUE TO
UNCERTAINTIES OF MOISTURE AVAILABILITY AND INSTABILITY.

.SPOTTER INFORMATION STATEMENT...
SPOTTER ACTIVATION MAY BE NEEDED ACROSS THE SLIGHT RISK AREA
TONIGHT...ESPECIALLY DURING THE EVENING HOURS.

05/

In the hours before

Special weather statement, Apr 3, 5:21 PM CDT, 1 hour 9 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE FORT WORTH TX
521 PM CDT TUE APR 3 2007

TXZ094-095-103>106-117>120-130>133-141>144-156-032245-
LAMAR TX-FANNIN TX-DELTA TX-DENTON TX-HUNT TX-COLLIN TX-PARKER TX-
TARRANT TX-DALLAS TX-ROCKWALL TX-JOHNSON TX-HOOD TX-ERATH TX-
SOMERVELL TX-COMANCHE TX-BOSQUE TX-HAMILTON TX-MILLS TX-LAMPASAS TX-
521 PM CDT TUE APR 3 2007

...SIGNIFICANT WEATHER ADVISORY FOR...
  BOSQUE COUNTY
  COLLIN COUNTY
  SOUTHEASTERN COMANCHE COUNTY
  DALLAS COUNTY
  SOUTHEASTERN DENTON COUNTY
  ERATH COUNTY
  FANNIN COUNTY
  HAMILTON COUNTY
  HOOD COUNTY
  HUNT COUNTY
  JOHNSON COUNTY
  LAMPASAS COUNTY
  MILLS COUNTY
  SOUTHEASTERN PARKER COUNTY
  ROCKWALL COUNTY
  SOMERVELL COUNTY
  TARRANT COUNTY
  WESTERN DELTA COUNTY
  LAMAR COUNTY

AT 521 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS CONTINUED TO
DETECT A LINE OF TOWERING CUMULUS CLOUDS JUST AHEAD OF A SOUTHEAST
MOVING COLD FRONT FROM NEAR GOLDTHWAITE AND SAN SABA...NORTHEAST
ACROSS ERATH...HAMILTON...BOSQUE...HOOD...SOMERVILLE...JOHNSON...
TARRANT...DALLAS...COLLIN...HUNT...FANNIN AND LAMAR COUNTIES.

WITH TEMPERATURES WARMING TO BETWEEN 80 AND 90 DEGREES LATE THIS
AFTERNOON...LOOK FOR THE POTENTIAL DEVELOPMENT OF ISOLATED TO
SCATTERED STRONG TO SEVERE THUNDERSTORMS TO DEVELOP BY OR SHORTLY
AFTER 6 PM CDT ACROSS THIS AREA. WITH SUCH HIGH INSTABILITY IN
PLACE...STORMS WILL INTENSIFY RAPIDLY AND LIKELY BECOME SEVERE WITH
LARGE HAIL AND DAMAGING WINDS IN THE NEXT HOUR OR TWO.

CITIES IN THE PATH OF THIS STORM INCLUDE ADDISON...ALEDO...ALLEN...
ALVARADO...ANNETTA...ARLINGTON...BAILEY...BALCH SPRINGS...BEDFORD...
BENBROOK...BLUE MOUND...BONHAM...BURLESON...CADDO MILLS...CAMPBELL...
CARROLLTON...CEDAR HILL...CELESTE...CLEBURNE...CLIFTON...COCKRELL
HILL...COLLEYVILLE...COMMERCE...COOPER...COPPELL...CRANFILLS GAP...
CROWLEY...DALLAS...DALWORTHINGTON GARDENS...DESOTO...DODD CITY...
DUBLIN...DUNCANVILLE...EDGECLIFF...EULESS...EVERMAN...FAIRVIEW...
FARMERS BRANCH...FARMERSVILLE...FATE...FLOWER MOUND...FOREST HILL...
FORT WORTH...FRISCO...GARLAND...GLEN ROSE...GODLEY...GOLDTHWAITE...
GRANBURY...GRAND PRAIRIE...GRANDVIEW...GRAPEVINE...GREENVILLE...
GUSTINE...HALTOM CITY...HAMILTON...HEATH...HEBRON...HICO...HIGHLAND
PARK...HONEY GROVE...HURST...HUTCHINS...IREDELL...IRVING...JOSHUA...
KEENE...KELLER...KENNEDALE...LAKE WORTH...LAKESIDE...LANCASTER...
LEONARD...LEWISVILLE...LOWRY CROSSING...LUCAS...MANSFIELD...
MCKINNEY...MERIDIAN...MESQUITE...MULLIN...MURPHY...NORTH RICHLAND
HILLS...OAK TRAIL SHORES...PANTEGO...PARIS...PARKER...PLANO...
PRINCETON...QUINLAN...RENDON...RICHARDSON...RICHLAND HILLS...RIVER
OAKS...ROCKWALL...ROWLETT...ROYSE CITY...SACHSE...SAGINAW...SANSOM
PARK...SEAGOVILLE...SOUTHLAKE...STEPHENVILLE...SUNNYVALE...THE
COLONY...UNIVERSITY PARK...VENUS...WATAUGA...WESTWORTH...WHITE
SETTLEMENT...WILMER...WOLFE CITY...WYLIE...CEDAR HILL STATE PARK...
CLEBURNE STATE PARK...DINOSAUR VALLEY STATE PARK...MERIDIAN STATE
PARK...BONHAM STATE PARK AND COOPER LAKE PARK DOCTORS CREEK.

IF STORMS DEVELOP AS EXPECTED BY 5 PM OR AFTER...THEYLL LIKELY GO
SEVERE IN A SHORT PERIOD OF TIME AND SEVERE WEATHER WARNINGS MAY BE
NEEDED.

LAT...LON 3153 9890 3261 9793 3339 9639 3383 9607
      3394 9560 3388 9530 3336 9564 3291 9611
      3282 9652 3256 9652 3256 9708 3227 9710
      3218 9747 3204 9750 3176 9732 3161 9758
      3173 9770 3147 9818 3121 9801 3106 9815

05/

Special weather statement, Apr 3, 6:14 PM CDT, 16 minutes before

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Special weather statement, Apr 3, 6:14 PM CDT, 16 minutes before

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Special weather statement, Apr 3, 6:15 PM CDT, 15 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE FORT WORTH TX
615 PM CDT TUE APR 3 2007

TXZ118-133-134-032345-
TARRANT TX-JOHNSON TX-ELLIS TX-
615 PM CDT TUE APR 3 2007

...SIGNIFICANT WEATHER ADVISORY FOR...
  NORTHWESTERN ELLIS COUNTY
  NORTHEASTERN JOHNSON COUNTY
  SOUTHEASTERN TARRANT COUNTY

AT 615 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
STRONG THUNDERSTORM 3 MILES NORTH OF KENNEDALE...MOVING SOUTHEAST AT
20 MPH.

CITIES IN THE PATH OF THIS STORM INCLUDE ARLINGTON...DALWORTHINGTON
GARDENS...EVERMAN...FOREST HILL...KENNEDALE...MANSFIELD...
MIDLOTHIAN...OVILLA...PANTEGO AND RENDON.

PEA-SIZED HAIL AND WIND GUSTS TO 45 MPH CAN BE EXPECTED FROM THIS
STORM.

IF THIS STORM INTENSIFIES...A SEVERE WEATHER WARNING MAY BE NEEDED.

LAT...LON 3281 9720 3269 9736 3241 9727 3245 9680

05/

Special weather statement, Apr 3, 6:17 PM CDT, 13 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE FORT WORTH TX
617 PM CDT TUE APR 3 2007

TXZ142>144-032345-
BOSQUE TX-HAMILTON TX-MILLS TX-
617 PM CDT TUE APR 3 2007

...SIGNIFICANT WEATHER ADVISORY FOR...
  BOSQUE COUNTY
  HAMILTON COUNTY
  SOUTHEASTERN MILLS COUNTY

AT 617 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
SCATTERED...STRONG THUNDERSTORMS FROM 8 MILES EAST OF
GOLDTHWAITE...TO NEAR HAMILTON...TO 7 MILES SOUTHWEST OF WALNUT
SPRINGS...MOVING SOUTHEAST AT 20 MPH.

CITIES IN THE PATH OF THIS STORM INCLUDE CLIFTON...CRANFILLS GAP...
HAMILTON...MERIDIAN AND MERIDIAN STATE PARK.

PEA-SIZED HAIL AND WIND GUSTS TO 50 MPH CAN BE EXPECTED FROM THIS
STORM.

IF ANY OF THESE STORMS INTENSIFIES...A SEVERE WEATHER WARNING MAY BE
NEEDED SHORTLY.

LAT...LON 3213 9761 3166 9841 3131 9852 3191 9726

05/

Special weather statement, Apr 3, 6:17 PM CDT, 13 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE FORT WORTH TX
617 PM CDT TUE APR 3 2007

TXZ142>144-032345-
BOSQUE TX-HAMILTON TX-MILLS TX-
617 PM CDT TUE APR 3 2007

...CORRECTED...

...SIGNIFICANT WEATHER ADVISORY FOR...
  BOSQUE COUNTY
  HAMILTON COUNTY
  SOUTHEASTERN MILLS COUNTY

AT 617 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
SCATTERED...STRONG THUNDERSTORMS FROM 8 MILES EAST OF
GOLDTHWAITE...TO NEAR HAMILTON...TO 7 MILES SOUTHWEST OF WALNUT
SPRINGS...MOVING SOUTHEAST AT 20 MPH.

CITIES IN THE PATH OF THIS STORM INCLUDE CLIFTON...CRANFILLS GAP...
HAMILTON...MERIDIAN AND MERIDIAN STATE PARK.

PEA-SIZED HAIL AND WIND GUSTS TO 50 MPH CAN BE EXPECTED FROM ANY OF
THESE STORMS.

IF ANY OF THESE STORMS INTENSIFIES...A SEVERE WEATHER WARNING MAY BE
NEEDED SHORTLY.

LAT...LON 3213 9761 3166 9841 3131 9852 3191 9726

05/

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 3, 4:27 PM CDT	Special Weather Statement	FWD	Comanche, Dallas, Erath, Hood, Johnson, Parker and 2 more	33 min
Apr 3, 5:21 PM CDT	Special Weather Statement	FWD	Bosque, Collin, Dallas, Delta, Erath, Fannin and 10 more	24 min
Apr 3, 6:14 PM CDT	Special Weather Statement	FWD	Rockwall	31 min
Apr 3, 6:15 PM CDT	Special Weather Statement	FWD	Tarrant	30 min
Apr 3, 6:17 PM CDT	Special Weather Statement	FWD	Bosque, Hamilton	28 min
Apr 3, 6:25 PM CDT	Severe Thunderstorm Warning	FWD	Tarrant	65 min
Apr 3, 6:34 PM CDT	Special Weather Statement	FWD	Coryell, Lampasas	56 min
Apr 3, 6:38 PM CDT	Special Weather Statement	FWD	Dallas	37 min
Apr 3, 6:48 PM CDT	Severe Thunderstorm Warning	FWD	Dallas	57 min
Apr 3, 6:48 PM CDT	Severe Thunderstorm Warning	FWD	Dallas	57 min
Apr 3, 6:52 PM CDT	Severe Thunderstorm Warning	FWD	Bosque, Hamilton	53 min
Apr 3, 6:56 PM CDT	Severe Thunderstorm Warning	FWD	Collin	56 min

Nearby

Severe Thunderstorm Warnings in Texas, 2007 Every severe thunderstorm warning in 2007

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.