Alert archive / Virginia / Flash Flood Warnings in 1993

Flash Flood Warning 4, NWS Blacksburg, VA

March 4, 1993Montgomery County, Virginia

NWS Blacksburg, VA issued this flash flood warning at Mar 4, 1993, 6:10 AM EST for Montgomery County, Virginia. It was in force for 110 min.

The area

The counties it named.

The facts

Issued
Mar 4, 1993, 6:10 AM EST (11:10 UTC)
Expired
Mar 4, 1993, 8:00 AM EST
In force
110 min
Issued by
NWS Blacksburg, VA
Area
Whole counties

County Montgomery County, VA

The nearest sounding before it

Greensboro/Hi Pt, NC (KGSO), launched 00:00Z, 11.2 hours before the alert went out and 129 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, Greensboro/Hi Pt, NC at 00:00Z on 1993-03-04Temperature 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, Greensboro/Hi Pt, NC at 00:00Z on 1993-03-04The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 98 square meters per square second.1939587897117136Sfc1 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
543 m above ground
0-6 km bulk shear
54 kt
0-1 km storm-relative helicity
98 m²/s²
0-3 km storm-relative helicity
293 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 Blacksburg, VA issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Mar 4, 4:04 AM ESTFlash Flood WarningRNKFranklin, Roanoke116 min
Mar 4, 5:40 AM ESTFlash Flood WarningRNKFranklin, Roanoke2 hr
Mar 4, 5:40 AM ESTFlash Flood WarningRNKBotetourt2 hr
Mar 4, 6:35 AM ESTFlash Flood WarningRNKHenry, City of Martinsville115 min
Mar 4, 8:01 AM ESTFlash Flood WarningRNKMontgomery3 hr
Mar 4, 8:01 AM ESTFlash Flood WarningRNKCity of Roanoke3 hr
Mar 4, 8:01 AM ESTFlash Flood WarningRNKCity of Salem3 hr
Mar 4, 8:01 AM ESTFlash Flood WarningRNKCity of Martinsville3 hr
Mar 4, 8:01 AM ESTFlash Flood WarningRNKBotetourt3 hr
Mar 4, 8:09 AM ESTFlash Flood WarningRNKCampbell3 hr
Mar 4, 11:22 AM ESTFlash Flood WarningRNKFranklin, Henry3 hr
Mar 4, 11:22 AM ESTFlash Flood WarningRNKBotetourt, Montgomery, Roanoke3 hr

Nearby

Flash Flood Warnings in Virginia, 1993Every flash flood warning in 1993

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.