Alert archive / Texas / Flash Flood Warnings in 1999

Flash Flood Warning 7, NWS Lubbock, TX

April 30, 1999Cochran County, Lamb County, Texas

NWS Lubbock, TX issued this flash flood warning at Apr 30, 1999, 6:48 PM CDT for Cochran County, Lamb County, Texas. It was in force for 4 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 30, 1999, 6:48 PM CDT (23:48 UTC)
Expired
Apr 30, 1999, 11:00 PM CDT
In force
4 hr
Issued by
NWS Lubbock, TX
Area
Whole counties

Counties Cochran County, TX, Lamb County, TX

The radar

The Lubbock radar (KLBB), 75 km from the middle of the area, began a volume at 23:52 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

Amarillo Airport, TX (KAMA), launched 12:00Z, 11.8 hours before the alert went out and 175 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, Amarillo Airport, TX at 12:00Z on 1999-04-30Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCLEL10008507005003002001001 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, Amarillo Airport, TX at 12:00Z on 1999-04-30The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 191 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
564 m above ground
0-6 km bulk shear
40 kt
0-1 km storm-relative helicity
191 m²/s²
0-3 km storm-relative helicity
307 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.0

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 Lubbock, TX issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Apr 30, 4:42 PM CDTTornado WarningLUBYoakum33 min
Apr 30, 5:27 PM CDTSevere Thunderstorm WarningLUBYoakum48 min
Apr 30, 5:43 PM CDTFlash Flood WarningLUBYoakum3 hr
Apr 30, 6:07 PM CDTTornado WarningLUBYoakum33 min
Apr 30, 6:23 PM CDTFlash Flood WarningLUBCastro4 hr
Apr 30, 6:40 PM CDTTornado WarningLUBYoakum30 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.