Alert archive / Texas / Flash Flood Warnings in 1998

Flash Flood Warning 45, NWS Fort Worth, TX

March 7, 1998Grayson County, Texas

NWS Fort Worth, TX issued this flash flood warning at Mar 7, 1998, 11:43 AM CST for Grayson 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
Mar 7, 1998, 11:43 AM CST (17:43 UTC)
Expired
Mar 7, 1998, 3:45 PM CST
In force
4 hr
Issued by
NWS Fort Worth, TX
Area
Whole counties

County Grayson County, TX

The radar

The Dallas/Ft Worth radar (KFWS), 131 km from the middle of the area, began a volume at 17:43 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, 5.7 hours before the alert went out and 105 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 1998-03-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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 1998-03-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 102 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
492 m above ground
0-6 km bulk shear
51 kt
0-1 km storm-relative helicity
102 m²/s²
0-3 km storm-relative helicity
168 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.8

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
Mar 6, 8:21 PM CSTSevere Thunderstorm WarningFWDGrayson69 min
Mar 7, 6:43 AM CSTSevere Thunderstorm WarningFWDComanche62 min
Mar 7, 6:58 AM CSTSevere Thunderstorm WarningFWDJack, Wise62 min
Mar 7, 7:05 AM CSTSevere Thunderstorm WarningFWDEastland70 min
Mar 7, 7:18 AM CSTSevere Thunderstorm WarningFWDGrayson27 min
Mar 7, 7:50 AM CSTSevere Thunderstorm WarningFWDErath, Palo Pinto70 min
Mar 7, 12:45 PM CSTSevere Thunderstorm WarningFWDDelta, Lamar60 min

Nearby

Flash Flood Warnings in Texas, 1998Every flash flood warning in 1998

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.