Alert archive / Texas / Flash Flood Warnings in 2007

Flash Flood Warning 184, NWS Fort Worth, TX

June 18, 2007Grayson County, Texas

NWS Fort Worth, TX issued this flash flood warning at Jun 18, 2007, 2:34 AM CDT for Grayson County, Texas. It was in force for 3 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Jun 18, 2007, 2:34 AM CDT (07:34 UTC)
Expired: Jun 18, 2007, 5:30 AM CDT
In force: 3 hr
Issued by: NWS Fort Worth, TX
Area: Whole counties

County Grayson County, TX

The radar

The Dallas/Ft Worth radar (KFWS), 131 km from the middle of the area, began a volume at 07:33 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, 7.6 hours before the alert went out and 105 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: 860 J/kg
Mixed-layer CIN: -5 J/kg
Mixed-layer LCL: 894 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: 86 m²/s²
0-3 km storm-relative helicity: 134 m²/s²
Significant tornado parameter: 0.3
Supercell composite: 2.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this flash flood 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 flash flood warning went out at Jun 17, 8:46 PM CDT, 5 hours 48 minutes earlier.

Area forecast discussion, Jun 17, 8:46 PM CDT, 5 hours 48 minutes before

AREA FORECAST DISCUSSION...UPDATED
NATIONAL WEATHER SERVICE FORT WORTH TX
846 PM CDT SUN JUN 17 2007

.UPDATE...
846 PM
REMOVING THE HEAVY RAIN WORDING FOR THIS EVENING AND LOWERING POPS
THROUGH 1 AM. ONCE AGAIN NOCTURNAL STORMS SHOULD REGENERATE...SO
HAVE CHANCE THROUGH LIKELY IN EARLY MORNING. FLOOD THREAT REMAINS
SINCE GROUND IS SO SATURATED. 84

&&

.DISCUSSION...
235 PM
SLOW-MOVING...HYBRID MID LVL LOW PUSHING VERNON/WICHITA FALLS AREA...
WITH A SLOW SHIFT TO THE NE OVER OKLAHOMA THROUGH 12-18Z MONDAY
(MONDAY MORNING). LEFT EXIT REGION OF WEAK SUB-TROPICAL 40-60KT
UPPER JET AND 30-40KT LLJ WILL COINCIDE OVER AREAS GENERALLY E/SE OF
THE LOW PRESSURE ALOFT AND FOCUS ISENTROPIC ASCENT LATER TONIGHT
ONCE AGAIN OVER E/NE PORTIONS OF NORTH TEXAS. FFA (FLASH FLOOD
WATCH) EXTENSION FOR THESE AREAS WILL BE ISSUED THROUGH DAYBREAK MON
MORNING...MAINLY ALONG/EAST OF I-35. LOOK FOR THIS PRODUCT SOMETIME
BETWEEN 3-4 PM...BUT GENERAL OUTLINE CAN BE NOTED ON ADVISORY LINE
BELOW THE PRELIM NUMBERS.

SCATTERED SHOWERS/THUNDERSTORMS WILL STILL BE POSSIBLE THROUGH THE
DAY MONDAY OVER THE NE 1/2 OF NORTH TEXAS...BEFORE SYSTEM DEPARTS
FAR ENOUGH AWAY MON NIGHT/TUES TO ALLOW SUB-TROPICAL UPPER RIDGE
TO AMPLIFY OVER THE AREA AND DIMINISH POPS. THROUGH THIS TIME...TEMPS
WILL BE COOLER THAN CLIMATOLOGY DUE TO CLOUD COVER/RAIN/AND WET
GROUND THROUGH AT LEAST MID WEEK...WITH HEATING BEING LOST ON ENERGY
USED FOR EVAPORATION. WILL STAY A FEW DEGREES BELOW GFS/MENMOS
NUMBERS THROUGH MID WEEK

UPPER RIDGE WILL MAINTAIN ITS HOLD OVER THE REGION THROUGH LATE
WEEK AND NEXT WEEKEND...WITH SOME WEAKNESS OVER E/SE COUNTIES (SE
OF D/FW METRO) FOR SMALL CHANCES OF DIURNAL CONVECTION. WEAK
DISTURBANCE OVER S TX FRI INTO THE WEEKEND SHOULD KEEP BEST RAIN
CHANCES DOWN THAT WAY...WHICH IS A GOOD THING SINCE WE DONT NEED
MORE RAIN ATTM. HOWEVER...WILL CARRY SOME SLIGHT CHANCE WORDING IN
SRN COUNTIES WITH UNCERTAINTY THIS FAR OUT IN THE GAME.

&&

.PRELIMINARY POINT TEMPS/POPS...
DALLAS-FT. WORTH, TX  70  86  75  89  75 /  60  40  10  20  10
WACO, TX              71  86  74  90  71 /  50  30  10  20  10
PARIS, TX             70  82  71  89  70 /  70  50  30  30  20
DENTON, TX            71  86  72  90  71 /  60  40  20  20  10
MCKINNEY, TX          70  85  72  89  70 /  70  50  20  20  10
DALLAS, TX            71  86  75  90  76 /  60  40  20  20  10
TERRELL, TX           70  84  73  89  73 /  70  50  20  20  20
CORSICANA, TX         71  85  74  89  72 /  60  40  20  30  20
TEMPLE, TX            72  87  74  91  72 /  40  20  10  20  10

&&

.FWD WATCHES/WARNINGS/ADVISORIES...
FLASH FLOOD WATCH UNTIL 4 PM CDT THIS AFTERNOON FOR THE FOLLOWING
ZONES: TXZ116-117-130>132-141>143-156>158-160-162-174-175.

FLASH FLOOD WATCH EXTENDED THROUGH LATE TONIGHT FOR THE FOLLOWING
ZONES: TXZ092-093-103-104 AND
TXZ094-095-105>107-118>123-133>135-144>148-159-161. GENERALLY
ALONG/NE OF A GAINESVILLE...D/FW...WACO...PALESTINE LINE.

&&

/05

Hazardous weather outlook, Jun 17, 11:00 PM CDT, 3 hours 34 minutes before

HAZARDOUS WEATHER OUTLOOK FOR NORTH TEXAS...UPDATED
NATIONAL WEATHER SERVICE FORT WORTH TX
1100 PM CDT SUN JUN 17 2007

TXZ091>095-100>107-115>123-129>135-141>148-156>162-174-175-181000-
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-
1100 PM CDT SUN JUN 17 2007

THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTH TEXAS.

.DAY ONE...
A FLASH FLOOD WATCH IS IN EFFECT TONIGHT FOR AREAS EAST OF A
MUENSTER...WALNUT SPRINGS...MCGREGOR LINE. RAINFALL AMOUNTS
UP TO TWO INCHES ARE POSSIBLE FROM INTENSE SHOWERS AND THUNDERSTORMS.

.DAYS TWO THROUGH SEVEN...
SCATTERED THUNDERSTORMS WILL BE POSSIBLE DAILY MONDAY THROUGH
FRIDAY...MAINLY ACROSS THE EASTERN HALF OF NORTH TEXAS. ANY HEAVY
RAINFALL DURING THE TIME PERIOD COULD RESULT IN FLASH FLOODING.

.SPOTTER INFORMATION STATEMENT...
LIMITED SPOTTER ACTIVATION MAY BE REQUESTED OVERNIGHT FOR THE THREAT
OF FLOODING.

In the hours before

Local storm report, Jun 18, 12:12 AM CDT, 2 hours 22 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE FORT WORTH TX
1212 AM CDT MON JUN 18 2007

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

1211 AM     FLASH FLOOD      NORTH RICHLAND HILLS    32.86N  97.22W
06/18/2007                   TARRANT            TX   TRAINED SPOTTER

            WATER OVER THE ROAD ON INTERSTATE 820 BETWEEN RUFE SNOW
            AND HIGHWAY 26.

Local storm report, Jun 18, 12:33 AM CDT, 2 hours 1 minute before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE FORT WORTH TX
1233 AM CDT MON JUN 18 2007

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

1232 AM     FLASH FLOOD      1 S KELLER              32.92N  97.23W
06/18/2007                   TARRANT            TX   TRAINED SPOTTER

            1.5 FOOT OF WATER AT THE HIGHWAY 377 AND BEAR CREEK
            PARKWAY

Special weather statement, Jun 18, 1:35 AM CDT, 59 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE FORT WORTH TX
135 AM CDT MON JUN 18 2007

TXZ118-180700-
TARRANT TX-
135 AM CDT MON JUN 18 2007

...SIGNIFICANT WEATHER ADVISORY FOR...
  NORTH CENTRAL TARRANT COUNTY

AT 135 AM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
STRONG THUNDERSTORM 4 MILES WEST OF KELLER...MOVING NORTHEAST AT 15
MPH.

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

LAT...LON 3291 9744 3283 9725 3299 9713 3300 9740

Local storm report, Jun 18, 1:58 AM CDT, 36 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE FORT WORTH TX
158 AM CDT MON JUN 18 2007

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

0157 AM     FLASH FLOOD      TROPHY CLUB             33.00N  97.19W
06/18/2007                   DENTON             TX   TRAINED SPOTTER

            FLASH FLOODING REPORTED SOUTHERN COUNTY BY DENTON
            SPOTTER NETWORK.

Local storm report, Jun 18, 2:12 AM CDT, 22 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE FORT WORTH TX
212 AM CDT MON JUN 18 2007

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

0211 AM     FLASH FLOOD      TROPHY CLUB             33.00N  97.19W
06/18/2007                   DENTON             TX   FIRE DEPT/RESCUE

            HIGH WATER RESCUE IN PROGRESS TROPHY CLUB.

Local storm report, Jun 18, 2:23 AM CDT, 11 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE FORT WORTH TX
223 AM CDT MON JUN 18 2007

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

0221 AM     FLASH FLOOD      KELLER                  32.93N  97.23W
06/18/2007                   TARRANT            TX   NWS EMPLOYEE

            MEASURED 4.25 INCHES OF RAIN IN KELLER BETWEEN MIDNIGHT
            AND 145 AM

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 17, 7:06 PM CDT	Special Weather Statement	FWD	Comanche	39 min
Jun 17, 7:13 PM CDT	Special Weather Statement	FWD	Lampasas	32 min
Jun 17, 11:39 PM CDT	Special Weather Statement	FWD	Tarrant	36 min
Jun 17, 11:44 PM CDT	Flash Flood Warning	FWD	Tarrant	3 hr
Jun 18, 12:02 AM CDT	Severe Thunderstorm Warning	FWD	Tarrant	43 min
Jun 18, 12:15 AM CDT	Flash Flood Warning	FWD	Denton	3 hr
Jun 18, 1:28 AM CDT	Tornado Warning	FWD	Denton	47 min
Jun 18, 1:35 AM CDT	Special Weather Statement	FWD	Tarrant	25 min
Jun 18, 1:41 AM CDT	Severe Thunderstorm Warning	FWD	Tarrant	21 min
Jun 18, 2:10 AM CDT	Severe Thunderstorm Warning	FWD	Denton	65 min
Jun 18, 2:14 AM CDT	Flash Flood Warning	FWD	Collin	3 hr
Jun 18, 2:36 AM CDT	Flash Flood Warning	FWD	Cooke	3 hr
Jun 18, 2:44 AM CDT	Special Weather Statement	FWD	Grayson	61 min
Jun 18, 3:05 AM CDT	Flash Flood Warning	FWD	Denton	4 hr
Jun 18, 3:10 AM CDT	Severe Thunderstorm Warning	FWD	Denton	80 min
Jun 18, 3:56 AM CDT	Special Weather Statement	FWD	Cooke	34 min
Jun 18, 4:01 AM CDT	Tornado Warning	FWD	Cooke	44 min
Jun 18, 4:40 AM CDT	Tornado Warning	FWD	Denton	50 min
Jun 18, 4:53 AM CDT	Severe Thunderstorm Warning	FWD	Cooke, Grayson	67 min
Jun 18, 5:20 AM CDT	Flash Flood Warning	FWD	Cooke, Grayson	4 hr
Jun 18, 6:18 AM CDT	Special Weather Statement	FWD	Cooke	27 min
Jun 18, 6:23 AM CDT	Severe Thunderstorm Warning	FWD	Cooke	67 min
Jun 18, 7:00 AM CDT	Special Weather Statement	FWD	Grayson	30 min
Jun 18, 7:24 AM CDT	Severe Thunderstorm Warning	FWD	Collin, Denton, Grayson	66 min
Jun 18, 7:41 AM CDT	Special Weather Statement	FWD	Montague	34 min
Jun 18, 7:52 AM CDT	Flash Flood Warning	FWD	Collin	3 hr
Jun 18, 7:57 AM CDT	Special Weather Statement	FWD	Fannin	33 min
Jun 18, 8:34 AM CDT	Special Weather Statement	FWD	Fannin	26 min
Jun 18, 9:00 AM CDT	Flash Flood Warning	FWD	Cooke, Grayson	3 hr
Jun 18, 9:24 AM CDT	Flash Flood Warning	FWD	Fannin, Hunt	3 hr
Jun 18, 11:09 AM CDT	Flash Flood Warning	FWD	Hopkins, Rains	3 hr
Jun 18, 11:56 AM CDT	Flood Watch	FWD	Collin, Cooke, Delta, Denton, Fannin, Grayson and 3 more	4 hr
Jun 18, 1:43 PM CDT	Flash Flood Warning	FWD	Fannin	3 hr
Jun 18, 2:02 PM CDT	Special Weather Statement	FWD	Grayson	28 min

Nearby

Flash Flood Warnings in Texas, 2007 Every flash flood 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.