Alert archive / Texas / Flash Flood Watches in 2007

Flash Flood Watch 5, NWS Shreveport, LA

June 17, 200719 counties in Texas

NWS Shreveport, LA issued this flash flood watch at Jun 17, 2007, 3:29 PM CDT for 19 counties in Texas. It took effect at Jun 17, 2007, 4:00 PM CDT. It was in force for 29 hr.

The area

The counties it named.

The facts

Issued: Jun 17, 2007, 3:29 PM CDT (20:29 UTC)
In effect from: Jun 17, 2007, 4:00 PM CDT
Expired: Jun 18, 2007, 9:20 PM CDT
In force: 29 hr
Issued by: NWS Shreveport, LA
Flood severity: None

Counties Angelina County, TX, Camp County, TX, Cherokee County, TX, Franklin County, TX, Gregg County, TX, Harrison County, TX, Marion County, TX, Morris County, TX, Nacogdoches County, TX, Panola County, TX, Red River County, TX, Rusk County, TX, Sabine County, TX, San Augustine County, TX, Shelby County, TX, Smith County, TX, Titus County, TX, Upshur County, TX, Wood County, TX

The radar

The Shreveport radar (KSHV), 83 km from the middle of the area, began a volume at 20:30 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, 8.5 hours before the alert went out and 246 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: 251 J/kg
Mixed-layer CIN: -30 J/kg
Mixed-layer LCL: 636 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: 51 m²/s²
0-3 km storm-relative helicity: 50 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 watch went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Shreveport, LA wrote its last area forecast discussion before this flash flood watch went out at Jun 17, 3:18 PM CDT, 11 minutes earlier.

Area forecast discussion, Jun 17, 3:18 PM CDT, 11 minutes before

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Hazardous weather outlook, Jun 17, 12:00 PM CDT, 3 hours 29 minutes before

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Nearby

Flash Flood Watches in Texas, 2007 Every flash flood watch 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.