Alert archive / Texas / Flash Flood Warnings in 1999

Flash Flood Warning 39, NWS Austin/San Antonio, TX

May 28, 1999Travis County, Williamson County, Texas

NWS Austin/San Antonio, TX issued this flash flood warning at May 28, 1999, 9:20 AM CDT for Travis County, Williamson County, Texas. It was in force for 70 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 28, 1999, 9:20 AM CDT (14:20 UTC)
Expired
May 28, 1999, 10:30 AM CDT
In force
70 min
Issued by
NWS Austin/San Antonio, TX
Area
Whole counties

Counties Travis County, TX, Williamson County, TX

The radar

The Ft Hood radar (KGRK), 39 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, 2.3 hours before the alert went out and 263 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 1999-05-28Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 334 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 1999-05-28The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 54 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
334 J/kg
Mixed-layer CIN
-47 J/kg
Mixed-layer LCL
613 m above ground
0-6 km bulk shear
37 kt
0-1 km storm-relative helicity
54 m²/s²
0-3 km storm-relative helicity
134 m²/s²
Significant tornado parameter
0.1
Supercell composite
0.5

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 Austin/San Antonio, TX issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 28, 1:42 AM CDTFlash Flood WarningEWXFayette3 hr
May 28, 3:56 AM CDTFlash Flood WarningEWXLavaca3 hr
May 28, 4:50 AM CDTFlash Flood WarningEWXBandera2 hr
May 28, 4:50 AM CDTSevere Thunderstorm WarningEWXBandera2 hr
May 28, 9:20 AM CDTSevere Thunderstorm WarningEWXTravis, Williamson70 min
May 28, 10:00 AM CDTFlash Flood WarningEWXBurnet, Llano2 hr
May 28, 12:46 PM CDTFlash Flood WarningEWXBurnet, Llano119 min
May 28, 2:34 PM CDTSevere Thunderstorm WarningEWXComal, Hays61 min
May 28, 4:33 PM CDTSevere Thunderstorm WarningEWXFayette, Lee62 min
May 28, 5:25 PM CDTSevere Thunderstorm WarningEWXDeWitt65 min
May 28, 5:51 PM CDTSevere Thunderstorm WarningEWXLavaca39 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.