Alert archive / Texas / Flash Flood Warnings in 2008

Flash Flood Warning 14, NWS Corpus Christi, TX

August 18, 2008Webb County, Texas

NWS Corpus Christi, TX issued this flash flood warning at Aug 18, 2008, 7:27 AM CDT for Webb County, Texas. It was in force for 93 min. 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 18, 2008, 7:27 AM CDT (12:27 UTC)
Expired: Aug 18, 2008, 9:00 AM CDT
In force: 93 min
Issued by: NWS Corpus Christi, TX
Area: Storm-based polygon
Flood severity: None

County Webb County, TX

The radar

The Corpus Christi radar (KCRP), 179 km from the middle of the area, began a volume at 12:28 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

Brownsville Intl, TX (KBRO), launched 12:00Z, 0.5 hours before the alert went out and 282 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: 2495 J/kg
Mixed-layer CIN: -2 J/kg
Mixed-layer LCL: 633 m above ground
0-6 km bulk shear: 12 kt
0-1 km storm-relative helicity: 7 m²/s²
0-3 km storm-relative helicity: 25 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 Corpus Christi, TX wrote its last area forecast discussion before this flash flood warning went out at Aug 17, 6:56 PM CDT, 12 hours 31 minutes earlier.

Area forecast discussion, Aug 17, 6:56 PM CDT, 12 hours 31 minutes before

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The office that day

Everything else NWS Corpus Christi, TX issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Aug 18, 9:08 AM CDT	Areal Flood Advisory	CRP	Webb	52 min
Aug 18, 10:12 AM CDT	Areal Flood Advisory	CRP	Webb	93 min
Aug 18, 12:23 PM CDT	Areal Flood Advisory	CRP	Kleberg, Nueces	52 min
Aug 18, 3:30 PM CDT	Flash Flood Watch	CRP	Aransas, Bee, Calhoun, Goliad, Jim Wells, Kleberg and 5 more	24 hr

Nearby

Flash Flood Warnings in Texas, 2008 Every flash flood warning in 2008

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.