Alert archive / Texas / Special Weather Statements in 2007

Special Weather Statement, NWS Fort Worth, TX

June 20, 2007Grayson County, Texas

NWS Fort Worth, TX issued this special weather statement at Jun 20, 2007, 7:10 PM CDT for Grayson County, Texas. It was in force for 35 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
Jun 20, 2007, 7:10 PM CDT (00:10 UTC)
Expired
Jun 20, 2007, 7:45 PM CDT
In force
35 min
Issued by
NWS Fort Worth, TX

County Grayson County, TX

The radar

The Dallas/Ft Worth radar (KFWS), 147 km from the middle of the area, began a volume at 00:09 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 00:00Z, 0.2 hours before the alert went out and 122 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 00:00Z on 2007-06-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 341 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 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 00:00Z on 2007-06-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -4 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
341 J/kg
Mixed-layer CIN
-67 J/kg
Mixed-layer LCL
1613 m above ground
0-6 km bulk shear
7 kt
0-1 km storm-relative helicity
-4 m²/s²
0-3 km storm-relative helicity
67 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

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 Jun 20, 6:36 PM CDT, 34 minutes earlier.

Area forecast discussion, Jun 20, 6:36 PM CDT, 34 minutes before
AREA FORECAST DISCUSSION...UPDATED
NATIONAL WEATHER SERVICE FORT WORTH TX
636 PM CDT WED JUN 20 2007

.AVIATION...
/00Z TAF PERIOD/
FORECAST FOCUS IS ON THE MESOSCALE CONVECTIVE VORTEX /MCV/ OVER
SOUTHWEST OKLAHOMA...WHICH SHOULD MOVE INTO WESTERN NORTH TEXAS
BETWEEN 00Z AND 06Z. AS A MODEST /20KT/ LOW LEVEL JET KICKS IN
TONIGHT...CONVECTION SHOULD RAPIDLY BLOSSOM NEAR THE MCV. AT THIS
TIME...IT IS DIFFICULT TO PINPOINT EXACTLY WHERE AND WHEN
CONVECTION WILL DEVELOP. THEREFORE...WILL CARRY VCTS AND CB IN THE
METROPLEX TAFS FROM 07Z THROUGH 12Z. THUNDERSTORMS WILL BE
POSSIBLE AGAIN DURING THE AFTERNOON. WILL USE CB MENTION TO HINT
AT T-STORMS AFTER 17Z. LATE MORNING/AFTERNOON T-STORM FORECAST WILL
LARGELY HINGE ON LOCATION/EVOLUTION OF MCV/S ACROSS THE REGION
DURING THE LATE OVERNIGHT PERIOD. LOCALIZED SUBSIDENCE REGIONS MAY
KEEP PRECIP OUT OF TAF SITES TOMORROW AFTERNOON...BUT ONLY TIME
WILL TELL THE DEVELOPMENT OF THESE MESOSCALE FEATURES.

FOR ACT...SIMILAR FORECAST TO METROPLEX SITES. HOWEVER...LIGHT
ECHOES ALONG AND SOUTH OF A GOLDTHWAITE TO KILLEEN TO PALESTINE
LINE...AND MOVING NORTH...WILL WARRANT VCSH MENTION AT ACT THROUGH
03Z. CURRENT THINKING LENDS BEST PRECIP CHANCES OVERNIGHT NORTH OF
ACT. HOWEVER...WILL CONTINUE TO MONITOR DEVELOPING CONDITIONS.

SCHULTZ
&&

.DISCUSSION... /ISSUED 400 PM CDT WED JUN 20 2007/
FLASH FLOOD WATCH NOW IN EFFECT FOR AREA OF ONGOING CONVECTION.
SFC BOUNDARY WAS THE FOCUS FOR INITIAL REDEVELOPMENT DURING THE
EARLY AFTERNOON. HIGH CAPE WITH ZERO CIN IN NE CWA. ALTHOUGH THIS
ACTIVITY WILL GRADUALLY WANE THIS EVENING...MORE WIDESPREAD
CONVECTION IS EXPECTED TO DEVELOP AFTER MIDNIGHT.

UPPER TROUGHING HAS DEVELOPED IN THE WAKE OF NOCTURNAL MCS.
CYCLONIC SPIN EVIDENT ACROSS OKLAHOMA IN VISIBLE SATELLITE. MODELS
PROG FEATURE TO EASE SOUTH...RIDING ALONG THE EASTERN PERIPHERY OF
UPPER RIDGE. AS THE LOW MOVES SOUTH...UPWARD MOTION WILL INCREASE
WITH TIME...HELPING TO INITIATE AND MAINTAIN NOCTURNAL CONVECTION
ACROSS NORTHERN PORTIONS OF CWA. THE 500 AND 700MB HEIGHT MINIMA
WILL BE NEAR THE NW ZONES LATE TONIGHT...WITH INTENSIFYING WARM
AND MOIST ADVECTION TO THE EAST OVER NC TEXAS. CONVECTION MAY
LINGER INTO MIDDAY THURSDAY.

RIDGE WILL NOT RECOVER FROM THE BEATING IT TOOK LAST NIGHT.
WEAKNESS BETWEEN HAWAIIAN HIGH AND BERMUDA HIGH WILL PERSIST
THROUGHOUT THE FORECAST PERIOD. THE TROUGH MAY EVEN INTENSIFY NEXT
WEEK. DESPITE PREVIOUS DRIER PROGNOSES AND STRONG CLIMATOLOGICAL
FORCING TO THE CONTRARY...THE WET PATTERN IS NOW A SHARED FEATURE
AMONG MODELS. KEEP THE UMBRELLAS HANDY. 25

CLIMATE...
400 PM CDT

THE SUMMER SOLSTICE IS THURSDAY JUNE 21 AT 106 PM CDT.

&&

.PRELIMINARY POINT TEMPS/POPS...
DALLAS-FT. WORTH, TX  73  91  72  92  73 /  50  50  40  30  30
WACO, TX              73  91  70  92  72 /  40  40  40  30  30
PARIS, TX             72  91  69  92  71 /  50  40  40  30  30
DENTON, TX            73  91  70  91  72 /  60  50  40  30  30
MCKINNEY, TX          73  90  70  91  71 /  60  50  40  30  30
DALLAS, TX            74  91  74  92  73 /  50  50  40  30  30
TERRELL, TX           74  91  70  92  72 /  40  50  40  30  30
CORSICANA, TX         73  91  71  92  72 /  30  40  40  30  30
TEMPLE, TX            72  92  71  91  72 /  30  40  40  30  30

&&

.FWD WATCHES/WARNINGS/ADVISORIES...
FLASH FLOOD WATCH FROM MIDNIGHT TONIGHT TO 6 AM CDT THURSDAY FOR
THE FOLLOWING ZONES: TXZ091>093-102>104-118-119.

FLASH FLOOD WATCH UNTIL 6 AM CDT THURSDAY FOR THE FOLLOWING
ZONES: TXZ094-095-105-106-120.

&&

SCHULTZ
Hazardous weather outlook, Jun 20, 6:00 PM CDT, 1 hour 10 minutes before
HAZARDOUS WEATHER OUTLOOK...UPDATED
NATIONAL WEATHER SERVICE FORT WORTH TX
600 PM CDT WED JUN 20 2007

TXZ091>095-100>107-115>123-129>135-141>148-156>162-174-175-211100-
ANDERSON-BELL-BOSQUE-COLLIN-COMANCHE-COOKE-CORYELL-DALLAS-DELTA-
DENTON-EASTLAND-ELLIS-ERATH-FALLS-FANNIN-FREESTONE-GRAYSON-HAMILTON-
HENDERSON-HILL-HOOD-HOPKINS-HUNT-JACK-JOHNSON-KAUFMAN-LAMAR-LAMPASAS-
LEON-LIMESTONE-MCLENNAN-MILAM-MILLS-MONTAGUE-NAVARRO-PALO PINTO-
PARKER-RAINS-ROBERTSON-ROCKWALL-SOMERVELL-STEPHENS-TARRANT-VAN ZANDT-
WISE-YOUNG-
600 PM CDT WED JUN 20 2007

THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTH TEXAS.

.DAY ONE...
ISOLATED TO SCATTERED THUNDERSTORMS WILL BE POSSIBLE THROUGH THE
OVERNIGHT HOURS. THE MAIN THREATS WILL BE LOCALLY HEAVY RAIN AND
CLOUD TO GROUND LIGHTNING. RAIN FALLING ON SATURATED GROUNDS WILL
CREATE THE POTENTIAL FOR FLASH FLOODING. A FLASH FLOOD WATCH HAS
BEEN ISSUED ALONG AND NORTHEAST OF A BOWIE...TO FORT WORTH...TO
DALLAS...TO COOPER LINE THROUGH 6 AM.

.DAYS TWO THROUGH SEVEN...
THUNDERSTORMS WILL BE POSSIBLE EACH DAY THROUGH TUESDAY...ESPECIALLY
IN THE AFTERNOON HOURS. THE MAIN THREAT WITH THESE STORMS WILL BE
LOCALIZED FLOODING AND CLOUD TO GROUND LIGHTNING.

.SPOTTER INFORMATION STATEMENT...
SPOTTER ACTIVATION IS POSSIBLE WEST OF INTERSTATE 35 OVERNIGHT.

SCHULTZ

In the hours before

Special weather statement, Jun 20, 2:40 PM CDT, 4 hours 30 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE FORT WORTH TX
240 PM CDT WED JUN 20 2007

TXZ105-202015-
HUNT TX-
240 PM CDT WED JUN 20 2007

...SIGNIFICANT WEATHER ADVISORY FOR...
  NORTHERN HUNT COUNTY

AT 240 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
STRONG THUNDERSTORM 6 MILES NORTH OF GREENVILLE...MOVING NORTHEAST AT
40 MPH.

CITIES IN THE PATH OF THIS STORM INCLUDE WOLFE CITY.

FREQUENT CLOUD TO GROUND LIGHTNING...VERY HEAVY RAINFALL...PEA-SIZED
HAIL...AND WIND GUSTS TO 40 MPH CAN BE EXPECTED FROM THIS STORM.

HEAVY RAINFALL MAY RESULT IN FLOODING OF LOW LYING AREAS SUCH AS
DITCHES AND UNDERPASSES. AVOID THESE AREAS AND DO NOT CROSS FLOODED
ROADS AS THEY MAY BE WASHED OUT.

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

LAT...LON 3319 9622 3313 9609 3327 9585 3341 9584
      3339 9606
Special weather statement, Jun 20, 2:59 PM CDT, 4 hours 11 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE FORT WORTH TX
259 PM CDT WED JUN 20 2007

TXZ106-107-202030-
DELTA TX-HOPKINS TX-
259 PM CDT WED JUN 20 2007

...SIGNIFICANT WEATHER ADVISORY FOR...
  EAST CENTRAL DELTA COUNTY
  NORTHEASTERN HOPKINS COUNTY

AT 259 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
STRONG THUNDERSTORM 10 MILES EAST OF SULPHUR SPRINGS...MOVING
NORTHEAST AT 15 MPH.

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

HEAVY RAINFALL MAY RESULT IN FLOODING OF LOW LYING AREAS SUCH AS
DITCHES AND UNDERPASSES. AVOID THESE AREAS AND DO NOT CROSS FLOODED
ROADS AS THEY MAY BE WASHED OUT.

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

LAT...LON 3320 9556 3314 9543 3323 9529 3338 9529
      3345 9553
Local storm report, Jun 20, 4:14 PM CDT, 2 hours 56 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE FORT WORTH TX
414 PM CDT WED JUN 20 2007

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

0350 PM     TSTM WND DMG     1 N PARIS               33.68N  95.55W
06/20/2007                   LAMAR              TX   EMERGENCY MNGR

            HOTEL ROOF AND TREES DAMAGED ON THE NORTH SIDE OF PARIS
Local storm report, Jun 20, 5:34 PM CDT, 1 hour 36 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE FORT WORTH TX
534 PM CDT WED JUN 20 2007

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

0533 PM     TSTM WND DMG     PARIS                   33.67N  95.55W
06/20/2007                   LAMAR              TX   TRAINED SPOTTER

            ROOF DAMAGE ON HWY 271 AND LOOP 286 IN PARIS. MOTEL AND
            RESTAURANT SUSTAINED ROOF DAMAGE. POWERLINES DOWN.
Local storm report, Jun 20, 5:37 PM CDT, 1 hour 33 minutes before
PRELIMINARY LOCAL STORM REPORT...CORRECTED FOR EVENT TIME
NATIONAL WEATHER SERVICE FORT WORTH TX
537 PM CDT WED JUN 20 2007

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

0400 PM     TSTM WND DMG     PARIS                   33.67N  95.55W
06/20/2007                   LAMAR              TX   TRAINED SPOTTER

            ROOF DAMAGE ON HWY 271 AND LOOP 286 IN PARIS. MOTEL AND
            RESTAURANT SUSTAINED ROOF DAMAGE. POWERLINES DOWN.
Special weather statement, Jun 20, 7:10 PM CDT, 0 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE FORT WORTH TX
710 PM CDT WED JUN 20 2007

TXZ093-210045-
GRAYSON TX-
710 PM CDT WED JUN 20 2007

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

AT 710 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
STRONG THUNDERSTORM 8 MILES SOUTHEAST OF DENISON...MOVING NORTH AT 10
MPH.

CITIES IN THE PATH OF THIS STORM INCLUDE BELLS...DENISON AND HENDRIX.

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

HEAVY RAINFALL MAY RESULT IN FLOODING OF LOW LYING AREAS SUCH AS
DITCHES AND UNDERPASSES. AVOID THESE AREAS AND DO NOT CROSS FLOODED
ROADS AS THEY MAY BE WASHED OUT.

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

LAT...LON 3359 9658 3360 9637 3389 9636 3387 9663

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 20, 8:17 PM CDTFlash Flood WarningFWDGrayson3 hr

Nearby

Special Weather Statements in Texas, 2007Every special weather statement 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.