Alert archive / Texas / Flash Flood Warnings in 1999

Flash Flood Warning 3, NWS Houston/Galveston, TX

January 29, 1999Trinity County, Texas

NWS Houston/Galveston, TX issued this flash flood warning at Jan 29, 1999, 6:03 AM CST for Trinity 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
Jan 29, 1999, 6:03 AM CST (12:03 UTC)
Expired
Jan 29, 1999, 8:05 AM CST
In force
2 hr
Issued by
NWS Houston/Galveston, TX
Area
Whole counties

County Trinity County, TX

The radar

The Houston radar (KHGX), 180 km from the middle of the area, began a volume at 12:02 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

Shreveport, LA (KSHV), launched 12:00Z, 0.1 hours before the alert went out and 203 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, Shreveport, LA at 12:00Z on 1999-01-29Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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, Shreveport, LA at 12:00Z on 1999-01-29The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 70 square meters per square second.193958Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
491 m above ground
0-6 km bulk shear
42 kt
0-1 km storm-relative helicity
70 m²/s²
0-3 km storm-relative helicity
236 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.4

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

The office that day

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

IssuedProductOfficeCountiesLasted
Jan 29, 4:42 AM CSTFlash Flood WarningHGXHouston2 hr
Jan 29, 5:34 AM CSTFlash Flood WarningHGXWalker111 min
Jan 29, 6:43 AM CSTFlash Flood WarningHGXHouston82 min
Jan 29, 8:32 AM CSTFlash Flood WarningHGXHouston, Trinity3 hr
Jan 29, 10:27 AM CSTFlash Flood WarningHGXSan Jacinto, Walker3 hr
Jan 29, 11:29 AM CSTFlash Flood WarningHGXHouston, Trinity3 hr
Jan 29, 4:54 PM CSTSevere Thunderstorm WarningHGXBurleson61 min
Jan 29, 5:49 PM CSTSevere Thunderstorm WarningHGXBrazos61 min

Nearby

Flash Flood Warnings in Texas, 1999Every flash flood warning in 1999

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.