Alert archive / Texas / Flash Flood Warnings in 2006

Flash Flood Warning 21, NWS Houston/Galveston, TX

June 19, 2006Brazoria County, Matagorda County, Texas

NWS Houston/Galveston, TX issued this flash flood warning at Jun 19, 2006, 11:41 PM CDT for Brazoria County, Matagorda County, Texas. It was in force for 6 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
Jun 19, 2006, 11:41 PM CDT (04:41 UTC)
Expired
Jun 20, 2006, 5:30 AM CDT
In force
6 hr
Issued by
NWS Houston/Galveston, TX
Area
Counties, with a storm outline in the text
Flood severity
None

Counties Brazoria County, TX, Matagorda County, TX

The radar

The Houston radar (KHGX), 83 km from the middle of the area, began a volume at 04:44 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, 4.7 hours before the alert went out and 211 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-pSkew-T log-p diagram, Corpus Christi, TX at 00:00Z on 2006-06-20Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1335 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Corpus Christi, TX at 00:00Z on 2006-06-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 36 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
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
1335 J/kg
Mixed-layer CIN
-105 J/kg
Mixed-layer LCL
1384 m above ground
0-6 km bulk shear
33 kt
0-1 km storm-relative helicity
36 m²/s²
0-3 km storm-relative helicity
80 m²/s²
Significant tornado parameter
0.2
Supercell composite
2.5

Open this sounding in Storm Lab

The office that day

Everything else NWS Houston/Galveston, TX issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jun 19, 8:42 PM CDTSpecial Marine WarningHGX63 min
Jun 19, 10:16 PM CDTSpecial Marine WarningHGX59 min
Jun 19, 10:48 PM CDTFlash Flood WarningHGXHarris, Montgomery3 hr
Jun 20, 2:29 AM CDTFlash Flood WarningHGXBrazoria, Harris, Matagorda65 hr
Jun 20, 3:08 AM CDTSpecial Marine WarningHGX97 min
Jun 20, 5:04 AM CDTFlash Flood WarningHGXHarris116 min
Jun 20, 5:25 AM CDTFlash Flood WarningHGXMatagorda3 hr
Jun 20, 5:37 AM CDTSpecial Marine WarningHGX83 min
Jun 20, 6:30 AM CDTFlash Flood WarningHGXChambers, Galveston, Liberty2 hr
Jun 20, 7:55 AM CDTFlash Flood WarningHGXMatagorda4 hr
Jun 20, 11:38 AM CDTFlash Flood WarningHGXMatagorda3 hr

Nearby

Flash Flood Warnings in Texas, 2006Every flash flood warning 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.