Alert archive / Virginia / Flash Flood Warnings in 1989

Flash Flood Warning 32, NWS Blacksburg, VA

September 16, 1989Roanoke County, Virginia

NWS Blacksburg, VA issued this flash flood warning at Sep 16, 1989, 1:24 PM EDT for Roanoke County, Virginia. It was in force for 2 hr.

The area

The counties it named.

The facts

Issued
Sep 16, 1989, 1:24 PM EDT (17:24 UTC)
Expired
Sep 16, 1989, 3:30 PM EDT
In force
2 hr
Issued by
NWS Blacksburg, VA
Area
Whole counties

County Roanoke County, VA

The radar

The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.

The nearest sounding before it

Huntington/Tri S, WV (KHTS), launched 12:00Z, 5.4 hours before the alert went out and 251 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, Huntington/Tri S, WV at 12:00Z on 1989-09-16Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 26 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, Huntington/Tri S, WV at 12:00Z on 1989-09-16The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 131 square meters per square second.1939587897Sfc1 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
26 J/kg
Mixed-layer CIN
-88 J/kg
Mixed-layer LCL
666 m above ground
0-6 km bulk shear
48 kt
0-1 km storm-relative helicity
131 m²/s²
0-3 km storm-relative helicity
117 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
Sep 15, 8:16 PM EDTFlash Flood WarningRNKCarroll119 min
Sep 15, 10:34 PM EDTFlash Flood WarningRNKCampbell116 min
Sep 15, 11:18 PM EDTFlash Flood WarningRNKFranklin117 min
Sep 16, 1:08 AM EDTFlash Flood WarningRNKHenry, Pittsylvania3 hr
Sep 16, 1:08 AM EDTFlash Flood WarningRNKBedford, Roanoke3 hr
Sep 16, 11:48 AM EDTFlash Flood WarningRNKGiles, Pulaski2 hr
Sep 16, 11:48 AM EDTFlash Flood WarningRNKGrayson2 hr
Sep 16, 1:01 PM EDTFlash Flood WarningRNKMontgomery119 min

Nearby

Flash Flood Warnings in Virginia, 1989Every flash flood warning in 1989

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.