Alert archive / Texas / Flash Flood Warnings in 1999

Flash Flood Warning 29, NWS Fort Worth, TX

April 3, 1999Hamilton County, Texas

NWS Fort Worth, TX issued this flash flood warning at Apr 3, 1999, 8:27 AM CST for Hamilton County, Texas. It was in force for 3 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
Apr 3, 1999, 8:27 AM CST (14:27 UTC)
Expired
Apr 3, 1999, 11:30 AM CST
In force
3 hr
Issued by
NWS Fort Worth, TX
Area
Whole counties; the outline is the Mesonet’s reconstruction

County Hamilton County, TX

The radar

The Dallas/Ft Worth radar (KFWS), 123 km from the middle of the area, began a volume at 14:23 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 12:00Z, 2.5 hours before the alert went out and 147 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 12:00Z on 1999-04-03Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 841 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 12:00Z on 1999-04-03The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 29 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
841 J/kg
Mixed-layer CIN
-35 J/kg
Mixed-layer LCL
918 m above ground
0-6 km bulk shear
33 kt
0-1 km storm-relative helicity
29 m²/s²
0-3 km storm-relative helicity
101 m²/s²
Significant tornado parameter
0.4
Supercell composite
2.6

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 Fort Worth, TX issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Apr 3, 4:00 AM CSTSevere Thunderstorm WarningFWDTarrant45 min
Apr 3, 4:37 AM CSTSevere Thunderstorm WarningFWDCollin, Denton68 min
Apr 3, 4:43 AM CSTSevere Thunderstorm WarningFWDTarrant47 min
Apr 3, 5:13 AM CSTSevere Thunderstorm WarningFWDGrayson62 min
Apr 3, 5:31 AM CSTSevere Thunderstorm WarningFWDFannin59 min
Apr 3, 5:45 AM CSTSevere Thunderstorm WarningFWDCollin, Denton45 min
Apr 3, 6:01 AM CSTSevere Thunderstorm WarningFWDMills29 min
Apr 3, 6:13 AM CSTSevere Thunderstorm WarningFWDGrayson47 min
Apr 3, 6:28 AM CSTSevere Thunderstorm WarningFWDHamilton47 min
Apr 3, 6:49 AM CSTSevere Thunderstorm WarningFWDDenton, Grayson41 min
Apr 3, 7:05 AM CSTFlash Flood WarningFWDDenton, Grayson3 hr
Apr 3, 7:13 AM CSTSevere Thunderstorm WarningFWDHamilton32 min
Apr 3, 7:24 AM CSTSevere Thunderstorm WarningFWDParker, Tarrant51 min
Apr 3, 7:30 AM CSTSevere Thunderstorm WarningFWDErath, Hood, Somervell45 min
Apr 3, 7:51 AM CSTSevere Thunderstorm WarningFWDDenton39 min
Apr 3, 9:18 AM CSTSevere Thunderstorm WarningFWDJohnson42 min
Apr 3, 9:42 AM CSTSevere Thunderstorm WarningFWDEllis48 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.