Alert archive / West Virginia / Flash Flood Warnings in 1998

Flash Flood Warning 20, NWS Charleston, WV

March 21, 1998McDowell County, West Virginia

NWS Charleston, WV issued this flash flood warning at Mar 21, 1998, 4:02 AM EST for McDowell County, West Virginia. 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
Mar 21, 1998, 4:02 AM EST (09:02 UTC)
Expired
Mar 21, 1998, 7:00 AM EST
In force
3 hr
Issued by
NWS Charleston, WV
Area
Whole counties

County McDowell County, WV

The nearest sounding before it

Roanoke, VA (KRNK), launched 00:00Z, 9.0 hours before the alert went out and 192 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, Roanoke, VA at 00:00Z on 1998-03-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 440 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, Roanoke, VA at 00:00Z on 1998-03-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 178 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
440 J/kg
Mixed-layer CIN
-13 J/kg
Mixed-layer LCL
713 m above ground
0-6 km bulk shear
42 kt
0-1 km storm-relative helicity
178 m²/s²
0-3 km storm-relative helicity
238 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.9

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 Charleston, WV issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Mar 20, 7:42 PM ESTFlash Flood WarningRLXClay, Fayette, Kanawha4 hr
Mar 20, 7:42 PM ESTFlash Flood WarningRLXRoane4 hr
Mar 20, 8:41 PM ESTFlash Flood WarningRLXBraxton, Webster3 hr
Mar 20, 11:23 PM ESTFlash Flood WarningRLXMcDowell4 hr
Mar 21, 12:32 AM ESTFlash Flood WarningRLXFayette, Kanawha, Roane3 hr
Mar 21, 4:02 AM ESTFlash Flood WarningRLXKanawha, Roane3 hr
Mar 21, 4:02 AM ESTFlash Flood WarningRLXFayette3 hr
Mar 21, 4:12 AM ESTFlash Flood WarningRLXFayette, Kanawha, Roane3 hr
Mar 21, 4:12 AM ESTFlash Flood WarningRLXMcDowell3 hr

Nearby

Flash Flood Warnings in West Virginia, 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.