Alert archive / Texas / Flash Flood Warnings in 2009

Flash Flood Warning 78, NWS Fort Worth, TX

September 13, 2009Anderson County, Henderson County, Van Zandt County, Texas

NWS Fort Worth, TX issued this flash flood warning at Sep 13, 2009, 9:23 PM CDT for Anderson County, Henderson County, Van Zandt County, Texas. It was in force for 9 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: Sep 13, 2009, 9:23 PM CDT (02:23 UTC)
Expired: Sep 14, 2009, 6:15 AM CDT
In force: 9 hr
Issued by: NWS Fort Worth, TX
Area: Storm-based polygon
Flood severity: None

Counties Anderson County, TX, Henderson County, TX, Van Zandt County, TX

The radar

The Dallas/Ft Worth radar (KFWS), 149 km from the middle of the area, began a volume at 02:23 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, 2.4 hours before the alert went out and 158 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: 270 J/kg
Mixed-layer CIN: -5 J/kg
Mixed-layer LCL: 494 m above ground
0-6 km bulk shear: 4 kt
0-1 km storm-relative helicity: -30 m²/s²
0-3 km storm-relative helicity: 40 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 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 Sep 13, 9:12 PM CDT, 11 minutes earlier.

Area forecast discussion, Sep 13, 9:12 PM CDT, 11 minutes before

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Hazardous weather outlook, Sep 13, 2:59 PM CDT, 6 hours 24 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE FORT WORTH TX
259 PM CDT SUN SEP 13 2009

TXZ091>095-100>107-115>123-129>135-141>148-156>162-174-175-141215-
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-
259 PM CDT SUN SEP 13 2009

THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTH TEXAS.

.DAY ONE...THIS AFTERNOON AND TONIGHT.

A FLASH FLOOD WATCH REMAINS IN EFFECT THROUGH THIS EVENING IN
SOUTHWEST NORTH TEXAS...AND OVERNIGHT FOR THE REST OF THE AREA.

SHOWERS WITH ISOLATED THUNDERSTORMS ARE EXPECTED TO CONTINUE OFF
AND ON ACROSS THE NORTHEASTERN ZONES OVERNIGHT. RAINFALL AMOUNTS
BETWEEN 1 AND 3 INCHES WILL OCCUR WITH MOST ACTIVITY...HOWEVER
LOCALIZED AMOUNTS UP TO 6 INCHES WILL BE POSSIBLE.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY.

RAIN CHANCES WILL BEGIN TO DECREASE MONDAY WITH A CHANCE OF
THUNDERSTORMS THROUGH WEDNESDAY. SLIGHT CHANCES OF STORMS WILL
RETURN TO NORTH TEXAS SATURDAY.

.SPOTTER INFORMATION STATEMENT...
SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.

In the hours before

Local storm report, Sep 13, 7:06 PM CDT, 2 hours 17 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE FORT WORTH TX
706 PM CDT SUN SEP 13 2009

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

0705 PM     FLOOD            DUNCANVILLE             32.65N  96.90W
09/13/2009                   DALLAS             TX   EMERGENCY MNGR

            HIGH WATER AND ROAD CLOSURES CONTINUE IN A FEW LOCATIONS
            ACROSS SW DALLAS COUNTY

Local storm report, Sep 13, 8:52 PM CDT, 31 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 13, 7:47 PM CDT	Flash Flood Warning	FWD	Henderson, Navarro	3 hr
Sep 13, 8:42 PM CDT	Areal Flood Advisory	FWD	Anderson, Henderson, Van Zandt	3 hr
Sep 13, 8:42 PM CDT	River Flood Warning	FWD	Navarro	61 hr
Sep 13, 9:32 PM CDT	Areal Flood Advisory	FWD	Hopkins, Hunt, Rains	3 hr
Sep 13, 10:27 PM CDT	Areal Flood Warning	FWD	Navarro	4 hr
Sep 14, 2:00 AM CDT	Areal Flood Advisory	FWD	Delta, Hopkins, Rains	2 hr
Sep 14, 2:19 AM CDT	River Flood Warning	FWD	Ellis, Kaufman	55 hr
Sep 14, 3:47 AM CDT	Areal Flood Advisory	FWD	Kaufman	118 min
Sep 14, 3:57 AM CDT	Areal Flood Advisory	FWD	Delta, Hopkins, Rains	3 hr
Sep 14, 5:51 AM CDT	Areal Flood Advisory	FWD	Kaufman	114 min
Sep 14, 6:21 AM CDT	Areal Flood Advisory	FWD	Van Zandt	114 min
Sep 14, 6:41 AM CDT	Flash Flood Warning	FWD	Rains, Van Zandt	3 hr
Sep 14, 9:21 AM CDT	Areal Flood Warning	FWD	Dallas, Ellis	3 hr
Sep 14, 9:53 AM CDT	Flash Flood Warning	FWD	Rains	3 hr
Sep 14, 11:42 AM CDT	Areal Flood Advisory	FWD	Delta, Hopkins, Hunt	3 hr

Nearby

Flash Flood Warnings in Texas, 2009 Every flash flood warning in 2009

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.