Alert archive / Texas / Special Weather Statements in 2012

Special Weather Statement, NWS Fort Worth, TX

August 6, 2012Fannin County, Texas

NWS Fort Worth, TX issued this special weather statement at Aug 6, 2012, 5:24 PM CDT for Fannin County, Texas. It was in force for 36 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: Aug 6, 2012, 5:24 PM CDT (22:24 UTC)
Expired: Aug 6, 2012, 6:00 PM CDT
In force: 36 min
Issued by: NWS Fort Worth, TX

County Fannin County, TX

The radar

The Dallas/Ft Worth radar (KFWS), 153 km from the middle of the area, began a volume at 22:25 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, 10.4 hours before the alert went out and 137 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: 1433 J/kg
Mixed-layer CIN: -149 J/kg
Mixed-layer LCL: 1436 m above ground
0-6 km bulk shear: 16 kt
0-1 km storm-relative helicity: -37 m²/s²
0-3 km storm-relative helicity: 10 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.2

Open this sounding in Storm Lab

The text

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

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What forecasters said that day

The local office's own words before this special weather statement 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 special weather statement went out at Aug 6, 3:46 PM CDT, 1 hour 38 minutes earlier.

Area forecast discussion, Aug 6, 3:46 PM CDT, 1 hour 38 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE FORT WORTH TX
346 PM CDT MON AUG 6 2012

.DISCUSSION...
SCATTERED SHOWERS AND THUNDERSTORMS ARE FORMING NEAR A SURFACE
BOUNDARY NORTH OF THE I-20 CORRIDOR THIS AFTERNOON. THESE STORMS
WILL MOVE SOUTHWEST OR SOUTH AT AROUND 10 MPH AND HAVE THE
POTENTIAL TO PRODUCE STRONG DOWNBURST WINDS DURING THE NEXT
SEVERAL HOURS. THE STORMS WILL WEAKEN TOWARD SUNSET.

WE WILL SEE LOW CHANCES OF SHOWERS AND THUNDERSTORMS THROUGH
THURSDAY NIGHT AND HAVE KEPT/PLACED 20 PERCENT POPS THROUGH THIS
TIME PERIOD. THE GFS BRINGS A FRONT INTO THE NORTHWESTERN PART OF
NORTH TEXAS BEFORE DAYBREAK THURSDAY AND THROUGH MOST OF THE
FORECAST AREA BY FRIDAY MORNING. THE ECMWF ALSO BRINGS A FRONT
INTO NORTH TEXAS BUT IS NOT QUITE AS AGGRESSIVE. FOR NOW HAVE
GENERALLY FOLLOWED THE ECMWF WHICH IS DRIER...PRECIPITATION
WISE...THAN THE GFS. TEMPERATURES MAY FALL BY A FEW DEGREES LATE
WEEK INTO THE WEEKEND...BUT ARE EXPECTED TO REMAIN ABOVE SEASONAL
NORMALS.

58

&&

.PRELIMINARY POINT TEMPS/POPS...
DALLAS-FT. WORTH, TX  81 104  80 102  80 /  20  20  20  20  20
WACO, TX              75 102  76 101  77 /  20  20  10  20  20
PARIS, TX             76 100  76  98  74 /  20  20  10  20  20
DENTON, TX            79 104  78 102  77 /  20  20  20  20  20
MCKINNEY, TX          78 103  77 102  77 /  20  20  20  20  20
DALLAS, TX            82 103  82 102  80 /  20  20  20  20  20
TERRELL, TX           78 101  76 100  76 /  20  20  20  20  20
CORSICANA, TX         77 101  77 100  77 /  20  20  10  20  20
TEMPLE, TX            73 101  74 100  74 /  10  20  10  20  20
MINERAL WELLS, TX     78 103  74 101  73 /  20  10  20  20  20

&&

.FWD WATCHES/WARNINGS/ADVISORIES...
HEAT ADVISORY UNTIL 8 PM CDT TUESDAY FOR TXZ107-122-123-135-
146>148-160>162-174-175.

&&

05/58

Hazardous weather outlook, Aug 6, 4:55 PM CDT, 29 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE FORT WORTH TX
455 PM CDT MON AUG 6 2012

TXZ091>095-100>107-115>123-129>135-141>148-156>162-174-175-071215-
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-
455 PM CDT MON AUG 6 2012

THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTH TEXAS.

.DAY ONE...TONIGHT.
ISOLATED THUNDERSTORMS ARE EXPECTED THIS EVENING...WITH BEST
CHANCES GENERALLY NORTH OF THE I-20 CORRIDOR. THE MAIN THREAT WILL
BE DOWNBURST WINDS IN EXCESS OF 60 MPH AND FREQUENT LIGHTNING.

A HEAT ADVISORY REMAINS IN EFFECT ALONG AND EAST OF A SULPHUR
SPRINGS...TO CORSICANA...TO CAMERON LINE.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY.

A HEAT ADVISORY WILL REMAIN IN EFFECT THROUGH 8 PM TUESDAY EVENING
FOR AREAS SOUTHEAST OF A SULPHUR SPRINGS...TO CORSICANA...TO
CAMERON LINE.

A CHANCE FOR MAINLY AFTERNOON AND EVENING THUNDERSTORMS WILL
CONTINUE ACROSS NORTH TEXAS TUESDAY THROUGH FRIDAY. GUSTY DOWNBURST
WINDS AND LIGHTNING WILL CONTINUE TO BE THE MAIN THREATS EACH DAY.

.SPOTTER INFORMATION STATEMENT...
LIMITED SPOTTER ACTIVATION MAY BE REQUESTED MAINLY NORTH OF I-20
THIS EVENING.

In the hours before

Special weather statement, Aug 6, 4:45 PM CDT, 39 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE FORT WORTH TX
445 PM CDT MON AUG 6 2012

TXZ093-062215-
GRAYSON TX-
445 PM CDT MON AUG 6 2012

...SIGNIFICANT WEATHER ADVISORY FOR...
  GRAYSON COUNTY

AT 444 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED
SEVERAL STRONG THUNDERSTORMS AROUND DENISON...MOVING SOUTH AT 15 MPH.

CITIES IN THE PATH OF THIS STORM INCLUDE BELLS...DENISON...
DORCHESTER...HOWE...KNOLLWOOD...POTTSBORO...SHERMAN...TOM BEAN...
WHITESBORO...WHITEWRIGHT...WILLIS AND EISENHOWER STATE PARK.

VERY HEAVY RAIN AND WIND GUSTS TO 50 MPH ARE LIKELY WITH THIS STORM.

LAT...LON 3386 9677 3383 9676 3385 9669 3382 9652
      3378 9650 3379 9642 3378 9641 3373 9638
      3344 9639 3347 9670 3363 9693 3387 9683
TIME...MOT...LOC 2144Z 009DEG 12KT 3372 9662

Local storm report, Aug 6, 4:46 PM CDT, 38 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE FORT WORTH TX
446 PM CDT MON AUG 06 2012

..TIME..    ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE..    ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0315 PM     TSTM WND DMG     KRUM                    33.27N  97.25W
08/06/2012                   DENTON             TX   PUBLIC

            POWER POLE DOWN AND SHINGLES OFF OF ROOF.

Local storm report, Aug 6, 4:54 PM CDT, 30 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE FORT WORTH TX
454 PM CDT MON AUG 06 2012

..TIME..    ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE..    ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0330 PM     TSTM WND GST     PROSPER                 33.23N  96.82W
08/06/2012  E60 MPH          COLLIN             TX   TRAINED SPOTTER

            60 MPH WIND GUST FROM SPOTTER IN PROSPER

Special weather statement, Aug 6, 5:16 PM CDT, 8 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE FORT WORTH TX
516 PM CDT MON AUG 6 2012

TXZ093-062245-
GRAYSON TX-
516 PM CDT MON AUG 6 2012

...SIGNIFICANT WEATHER ADVISORY FOR...
  SOUTHERN GRAYSON COUNTY

AT 515 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
CLUSTER OF SEVERAL STRONG THUNDERSTORM OCCURRING ACROSS THE CENTRAL
PART OF GRAYSON COUNTY...MOVING SOUTH AT 10 MPH.

CITIES IN THE PATH OF THIS STORM INCLUDE COLLINSVILLE...DORCHESTER...
GUNTER...HOWE...SHERMAN...VAN ALSTYNE AND WHITESBORO.

VERY HEAVY RAIN AND WIND GUSTS TO 50 MPH ARE LIKELY WITH NAY OF
THESE STORMS.

LAT...LON 3362 9652 3340 9653 3340 9665 3343 9693
      3377 9693
TIME...MOT...LOC 2215Z 345DEG 7KT 3361 9672

Local storm report, Aug 6, 5:24 PM CDT, 0 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE FORT WORTH TX
524 PM CDT MON AUG 06 2012

..TIME..    ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE..    ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0330 PM     TSTM WND DMG     PROSPER                 33.23N  96.82W
08/06/2012                   COLLIN             TX   TRAINED SPOTTER

            SEVERAL 4 INCH DIAMETER TREES DOWN

Special weather statement, Aug 6, 5:24 PM CDT, 0 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE FORT WORTH TX
524 PM CDT MON AUG 6 2012

TXZ094-105-062300-
FANNIN TX-HUNT TX-
524 PM CDT MON AUG 6 2012

...SIGNIFICANT WEATHER ADVISORY FOR...
  SOUTHERN FANNIN COUNTY
  NORTHEASTERN HUNT COUNTY

AT 524 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
CLUSTER OF STRONG THUNDERSTORMS 11 MILES SOUTHEAST OF BONHAM...MOVING
SOUTHEAST AT 15 MPH.

CITIES IN THE PATH OF THIS STORM INCLUDE BAILEY...HONEY GROVE AND
WOLFE CITY.

PENNY-SIZED HAIL AND WIND GUSTS TO 55 MPH CAN BE EXPECTED FROM THESE
STORMS.

LAT...LON 3330 9586 3327 9612 3350 9621 3360 9586
TIME...MOT...LOC 2224Z 330DEG 13KT 3343 9609

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 5, 8:57 PM CDT	Special Weather Statement	FWD	Delta	33 min
Aug 5, 9:36 PM CDT	Special Weather Statement	FWD	Delta	24 min
Aug 5, 10:14 PM CDT	Special Weather Statement	FWD	Fannin	31 min
Aug 6, 3:19 PM CDT	Special Weather Statement	FWD	Denton	26 min
Aug 6, 3:27 PM CDT	Special Weather Statement	FWD	Collin	33 min
Aug 6, 3:53 PM CDT	Special Weather Statement	FWD	Collin	22 min
Aug 6, 4:04 PM CDT	Special Weather Statement	FWD	Denton	26 min
Aug 6, 4:27 PM CDT	Special Weather Statement	FWD	Wise	33 min
Aug 6, 4:33 PM CDT	Special Weather Statement	FWD	Jack	27 min
Aug 6, 4:36 PM CDT	Special Weather Statement	FWD	Dallas	24 min
Aug 6, 4:45 PM CDT	Special Weather Statement	FWD	Grayson	30 min
Aug 6, 4:51 PM CDT	Severe Thunderstorm Warning	FWD	Denton, Parker, Tarrant, Wise	39 min
Aug 6, 4:57 PM CDT	Severe Thunderstorm Warning	FWD	Collin, Fannin, Grayson, Hunt	48 min
Aug 6, 5:16 PM CDT	Special Weather Statement	FWD	Grayson	29 min
Aug 6, 5:31 PM CDT	Special Weather Statement	FWD	Lamar	29 min
Aug 6, 5:44 PM CDT	Special Weather Statement	FWD	Hunt	31 min
Aug 6, 5:49 PM CDT	Severe Thunderstorm Warning	FWD	Hunt	34 min
Aug 6, 6:01 PM CDT	Special Weather Statement	FWD	Lamar	29 min
Aug 6, 6:18 PM CDT	Severe Thunderstorm Warning	FWD	Delta, Lamar	42 min
Aug 6, 6:30 PM CDT	Special Weather Statement	FWD	Parker	30 min
Aug 6, 6:54 PM CDT	Severe Thunderstorm Warning	FWD	Delta, Fannin, Lamar	29 min

Nearby

Special Weather Statements in Texas, 2012 Every special weather statement in 2012

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.