Alert archive / Texas / Flash Flood Warnings in 2024

Flash Flood Warning 40, NWS Houston/Galveston, TX

May 9, 2024Polk County, San Jacinto County, Trinity County, Texas

NWS Houston/Galveston, TX issued this flash flood warning at May 9, 2024, 9:36 PM CDT for Polk County, San Jacinto County, Trinity County, Texas. It was in force for 114 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
May 9, 2024, 9:36 PM CDT (02:36 UTC)
Expired
May 9, 2024, 11:30 PM CDT
In force
114 min
Issued by
NWS Houston/Galveston, TX
Area
Storm-based polygon
Flood severity
None

Counties Polk County, TX, San Jacinto County, TX, Trinity County, TX

The radar

The Houston radar (KHGX), 150 km from the middle of the area, began a volume at 02:38 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

Fort Worth, TX (KFWD), launched 00:00Z, 2.6 hours before the alert went out and 308 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, Fort Worth, TX at 00:00Z on 2024-05-10Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 26 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, Fort Worth, TX at 00:00Z on 2024-05-10The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 91 square meters per square second.1939587897Sfc1 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
26 J/kg
Mixed-layer CIN
-386 J/kg
Mixed-layer LCL
1104 m above ground
0-6 km bulk shear
59 kt
0-1 km storm-relative helicity
91 m²/s²
0-3 km storm-relative helicity
351 m²/s²
Significant tornado parameter
0.0
Supercell composite
14.8

Open this sounding in Storm Lab

The office that day

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

IssuedProductOfficeCountiesLasted
May 9, 7:20 PM CDTSpecial Weather StatementHGXTrinity, Walker25 min
May 9, 7:45 PM CDTSpecial Weather StatementHGXTrinity, Walker30 min
May 9, 7:50 PM CDTSevere Thunderstorm WarningHGXPolk, Trinity25 min
May 9, 8:02 PM CDTSevere Thunderstorm WarningHGXPolk, San Jacinto, Trinity, Walker28 min
May 9, 8:09 PM CDTSevere Thunderstorm Warning Considerable damage threatHGXGrimes, Houston, Madison, Walker51 min
May 9, 8:11 PM CDTSpecial Weather StatementHGXBrazos34 min
May 9, 8:13 PM CDTSevere Thunderstorm WarningHGXPolk32 min
May 9, 8:28 PM CDTSevere Thunderstorm WarningHGXPolk, San Jacinto, Trinity19 min
May 9, 8:43 PM CDTSevere Thunderstorm WarningHGXPolk17 min
May 9, 8:46 PM CDTSpecial Weather StatementHGXTrinity29 min
May 9, 8:51 PM CDTSevere Thunderstorm WarningHGXHouston, Madison, San Jacinto, Trinity, Walker24 min
May 9, 8:53 PM CDTSevere Thunderstorm WarningHGXPolk, Trinity52 min
May 9, 8:58 PM CDTSpecial Weather StatementHGXWalker32 min
May 9, 9:01 PM CDTSevere Thunderstorm WarningHGXGrimes, Walker29 min
May 9, 9:13 PM CDTSevere Thunderstorm Warning Considerable damage threatHGXHouston, Polk, San Jacinto, Trinity, Walker32 min
May 9, 9:20 PM CDTSevere Thunderstorm WarningHGXMontgomery, Polk, San Jacinto, Walker25 min
May 9, 9:37 PM CDTSpecial Weather StatementHGXPolk38 min
May 9, 9:44 PM CDTSpecial Weather StatementHGXPolk31 min
May 9, 9:47 PM CDTSpecial Weather StatementHGXSan Jacinto28 min
May 9, 10:04 PM CDTSpecial Weather StatementHGXLiberty, Polk, San Jacinto26 min
May 9, 10:29 PM CDTSpecial Weather StatementHGXHardin31 min
May 9, 10:42 PM CDTSevere Thunderstorm Warning Considerable damage threatHGXAustin, Colorado, Washington33 min
May 9, 11:16 PM CDTSevere Thunderstorm WarningHGXAustin, Colorado, Waller16 min
May 9, 11:26 PM CDTSevere Thunderstorm WarningHGXAustin, Colorado, Waller6 min
May 9, 11:33 PM CDTSpecial Weather StatementHGXAustin27 min
May 10, 8:20 AM CDTRiver Flood WarningHGXFort Bend3 days

Nearby

Flash Flood Warnings in Texas, 2024Every flash flood warning in 2024

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.