Alert archive / Texas / Flash Flood Warnings in 2009

Flash Flood Warning 60, NWS Fort Worth, TX

August 1, 2009Henderson County, Texas

NWS Fort Worth, TX issued this flash flood warning at Aug 1, 2009, 6:00 PM CDT for Henderson County, Texas. It was in force for 2 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: Aug 1, 2009, 6:00 PM CDT (23:00 UTC)
Expired: Aug 1, 2009, 8:00 PM CDT
In force: 2 hr
Issued by: NWS Fort Worth, TX
Area: Storm-based polygon
Flood severity: None

County Henderson County, TX

The radar

The Dallas/Ft Worth radar (KFWS), 142 km from the middle of the area, began a volume at 23:03 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

Shreveport, LA (KSHV), launched 12:00Z, 11.0 hours before the alert went out and 200 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: 1495 J/kg
Mixed-layer CIN: -44 J/kg
Mixed-layer LCL: 790 m above ground
0-6 km bulk shear: 18 kt
0-1 km storm-relative helicity: 90 m²/s²
0-3 km storm-relative helicity: 135 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 Aug 1, 3:26 PM CDT, 2 hours 34 minutes earlier.

Area forecast discussion, Aug 1, 3:26 PM CDT, 2 hours 34 minutes before

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Hazardous weather outlook, Aug 1, 2:32 PM CDT, 3 hours 28 minutes before

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In the hours before

Special weather statement, Aug 1, 2:32 PM CDT, 3 hours 28 minutes before

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Special weather statement, Aug 1, 4:12 PM CDT, 1 hour 48 minutes before

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Special weather statement, Aug 1, 4:21 PM CDT, 1 hour 39 minutes before

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Local storm report, Aug 1, 4:26 PM CDT, 1 hour 34 minutes before

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Special weather statement, Aug 1, 4:43 PM CDT, 1 hour 17 minutes before

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Special weather statement, Aug 1, 5:32 PM CDT, 28 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
Jul 31, 7:16 PM CDT	Special Weather Statement	FWD	Hood	29 min
Jul 31, 8:04 PM CDT	Special Weather Statement	FWD	Tarrant	26 min
Jul 31, 8:29 PM CDT	Special Weather Statement	FWD	Tarrant	31 min
Jul 31, 8:40 PM CDT	Areal Flood Advisory	FWD		2 hr
Jul 31, 8:57 PM CDT	Special Weather Statement	FWD	Dallas, Denton	33 min
Aug 1, 9:53 AM CDT	Areal Flood Advisory	FWD	Dallas	3 hr
Aug 1, 12:59 PM CDT	Areal Flood Advisory	FWD	Hopkins	3 hr
Aug 1, 2:32 PM CDT	Special Weather Statement	FWD	Hamilton	28 min
Aug 1, 3:55 PM CDT	Severe Thunderstorm Warning	FWD	Parker	51 min
Aug 1, 4:12 PM CDT	Special Weather Statement	FWD	Coryell	33 min
Aug 1, 4:21 PM CDT	Special Weather Statement	FWD	Hood	29 min
Aug 1, 4:29 PM CDT	Areal Flood Advisory	FWD	Eastland, Palo Pinto, Stephens	3 hr
Aug 1, 4:43 PM CDT	Special Weather Statement	FWD	Hood, Johnson	32 min
Aug 1, 4:55 PM CDT	Areal Flood Advisory	FWD	Hood, Johnson, Somervell	3 hr
Aug 1, 5:10 PM CDT	Areal Flood Advisory	FWD	Henderson	3 hr
Aug 1, 5:30 PM CDT	Areal Flood Advisory	FWD	Dallas, Ellis, Kaufman, Van Zandt	3 hr
Aug 1, 5:32 PM CDT	Special Weather Statement	FWD	Ellis	28 min
Aug 1, 6:39 PM CDT	Areal Flood Advisory	FWD	Navarro	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.