Alert archive / Texas / Flash Flood Warnings in 2006

Flash Flood Warning 59, NWS Houston/Galveston, TX

October 19, 2006Grimes County, Walker County, Texas

NWS Houston/Galveston, TX issued this flash flood warning at Oct 19, 2006, 1:15 AM CDT for Grimes County, Walker 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
Oct 19, 2006, 1:15 AM CDT (06:15 UTC)
Expired
Oct 19, 2006, 3:15 AM CDT
In force
2 hr
Issued by
NWS Houston/Galveston, TX
Area
Counties, with a storm outline in the text

Counties Grimes County, TX, Walker County, TX

The radar

The Houston radar (KHGX), 146 km from the middle of the area, began a volume at 06:17 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

Lake Charles Mun, LA (KLCH), launched 00:00Z, 6.3 hours before the alert went out and 254 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, Lake Charles Mun, LA at 00:00Z on 2006-10-19Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1015 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, Lake Charles Mun, LA at 00:00Z on 2006-10-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 149 square meters per square second.19395878Sfc1 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
1015 J/kg
Mixed-layer CIN
-16 J/kg
Mixed-layer LCL
579 m above ground
0-6 km bulk shear
57 kt
0-1 km storm-relative helicity
149 m²/s²
0-3 km storm-relative helicity
251 m²/s²
Significant tornado parameter
1.1
Supercell composite
6.3

Open this sounding in Storm Lab

The office that day

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

IssuedProductOfficeCountiesLasted
Oct 18, 8:00 PM CDTFlash Flood WarningHGXLiberty3 hr
Oct 18, 9:38 PM CDTSevere Thunderstorm WarningHGXBurleson, Washington67 min
Oct 18, 10:20 PM CDTSevere Thunderstorm WarningHGXGrimes55 min
Oct 18, 10:33 PM CDTSevere Thunderstorm WarningHGXBrazos27 min
Oct 18, 10:45 PM CDTSevere Thunderstorm WarningHGXWashington30 min
Oct 18, 10:57 PM CDTFlash Flood WarningHGXLiberty2 hr
Oct 18, 11:19 PM CDTFlash Flood WarningHGXGrimes, Walker116 min
Oct 19, 12:20 AM CDTFlash Flood WarningHGXMontgomery, Polk, San Jacinto115 min
Oct 19, 1:00 AM CDTFlash Flood WarningHGXLiberty3 hr
Oct 19, 2:10 AM CDTFlash Flood WarningHGXPolk, San Jacinto110 min
Oct 19, 4:08 AM CDTFlash Flood WarningHGXLiberty, Polk, San Jacinto112 min

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.