Alert archive / Texas / Flash Flood Warnings in 1997

Flash Flood Warning 95, NWS Fort Worth, TX

April 11, 1997Collin County, Denton County, Texas

NWS Fort Worth, TX issued this flash flood warning at Apr 11, 1997, 6:38 AM CDT for Collin County, Denton County, Texas. It was in force for 52 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
Apr 11, 1997, 6:38 AM CDT (11:38 UTC)
Expired
Apr 11, 1997, 7:30 AM CDT
In force
52 min
Issued by
NWS Fort Worth, TX
Area
Whole counties

Counties Collin County, TX, Denton County, TX

The radar

The Dallas/Ft Worth radar (KFWS), 82 km from the middle of the area, began a volume at 11:38 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, 11.6 hours before the alert went out and 58 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 1997-04-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 910 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 1997-04-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -5 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
910 J/kg
Mixed-layer CIN
-43 J/kg
Mixed-layer LCL
1072 m above ground
0-6 km bulk shear
19 kt
0-1 km storm-relative helicity
-5 m²/s²
0-3 km storm-relative helicity
87 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

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 Fort Worth, TX issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Apr 11, 4:08 AM CDTSevere Thunderstorm WarningFWDJack, Young67 min
Apr 11, 6:33 AM CDTSevere Thunderstorm WarningFWDDallas, Tarrant42 min
Apr 11, 6:38 AM CDTSevere Thunderstorm WarningFWDCollin, Denton52 min
Apr 11, 7:23 AM CDTSevere Thunderstorm WarningFWDJohnson37 min
Apr 11, 7:45 AM CDTSevere Thunderstorm WarningFWDEllis, Hill45 min
Apr 11, 8:30 AM CDTSevere Thunderstorm WarningFWDEllis, Navarro30 min
Apr 11, 8:39 AM CDTSevere Thunderstorm WarningFWDHenderson, Kaufman51 min
Apr 11, 8:55 AM CDTSevere Thunderstorm WarningFWDNavarro50 min

Nearby

Flash Flood Warnings in Texas, 1997Every flash flood warning in 1997

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.