Alert archive / Texas / Flash Flood Watches in 2006

Flash Flood Watch 4, NWS Austin/San Antonio, TX

May 30, 20066 counties in Texas

NWS Austin/San Antonio, TX issued this flash flood watch at May 30, 2006, 4:39 AM CDT for 6 counties in Texas. It took effect at May 30, 2006, 8:00 AM CDT. It was in force for 13 hr.

The area

The counties it named.

The facts

Issued: May 30, 2006, 4:39 AM CDT (09:39 UTC)
In effect from: May 30, 2006, 8:00 AM CDT
Expired: May 30, 2006, 8:55 PM CDT
In force: 13 hr
Issued by: NWS Austin/San Antonio, TX
Flood severity: None

Counties DeWitt County, TX, Fayette County, TX, Gonzales County, TX, Karnes County, TX, Lavaca County, TX, Wilson County, TX

The radar

The Austin/San Antonio radar (KEWX), 72 km from the middle of the area, began a volume at 09:39 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

Corpus Christi, TX (KCRP), launched 00:00Z, 9.7 hours before the alert went out and 176 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: 2444 J/kg
Mixed-layer CIN: -6 J/kg
Mixed-layer LCL: 895 m above ground
0-6 km bulk shear: 14 kt
0-1 km storm-relative helicity: 6 m²/s²
0-3 km storm-relative helicity: -14 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 Austin/San Antonio, TX wrote its last area forecast discussion before this flash flood watch went out at May 30, 4:20 AM CDT, 19 minutes earlier.

Area forecast discussion, May 30, 4:20 AM CDT, 19 minutes before

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Nearby

Flash Flood Watches in Texas, 2006 Every flash flood watch in 2006

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.