Alert archive / Virginia / Flash Flood Warnings in 1992

Flash Flood Warning 22, NWS Baltimore/Washington

April 22, 1992Shenandoah County, Virginia

NWS Baltimore/Washington issued this flash flood warning at Apr 22, 1992, 1:45 AM EDT for Shenandoah County, Virginia. It was in force for 2 hr.

The area

The counties it named.

The facts

Issued
Apr 22, 1992, 1:45 AM EDT (05:45 UTC)
Expired
Apr 22, 1992, 4:00 AM EDT
In force
2 hr
Issued by
NWS Baltimore/Washington
Area
Whole counties

County Shenandoah County, VA

The nearest sounding before it

Washington/Dulle, VA (KIAD), launched 00:00Z, 5.8 hours before the alert went out and 102 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, Washington/Dulle, VA at 00:00Z on 1992-04-22Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 230 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Washington/Dulle, VA at 00:00Z on 1992-04-22The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 269 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
230 J/kg
Mixed-layer CIN
-7 J/kg
Mixed-layer LCL
635 m above ground
0-6 km bulk shear
42 kt
0-1 km storm-relative helicity
269 m²/s²
0-3 km storm-relative helicity
339 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.0

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.

What forecasters said that day

The local office's own words before this flash flood warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

In the hours before

Special weather statement, Apr 21, 10:09 PM EDT, 3 hours 36 minutes before
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The office that day

Everything else NWS Baltimore/Washington issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Apr 21, 9:30 PM EDTFlash Flood WarningLWXClarke, Frederick, Shenandoah, Warren5 hr
Apr 21, 11:40 PM EDTFlash Flood WarningLWXAugusta, Greene, Page, Rockingham4 hr
Apr 21, 11:40 PM EDTFlash Flood WarningLWXMadison4 hr
Apr 22, 12:00 AM EDTFlash Flood WarningLWXCulpeper, Fauquier4 hr
Apr 22, 12:00 AM EDTFlash Flood WarningLWXPrince William4 hr
Apr 22, 1:45 AM EDTFlash Flood WarningLWXClarke, Frederick, Warren2 hr
Apr 21, 11:44 PM EDTFlash Flood WarningLWXWashington2 hr
Apr 21, 11:44 PM EDTFlash Flood WarningLWXFrederick2 hr
Apr 22, 1:45 AM EDTFlash Flood WarningLWXWashington2 hr
Apr 22, 1:45 AM EDTFlash Flood WarningLWXFrederick2 hr
Apr 21, 9:03 PM EDTFlash Flood WarningLWXMorgan3 hr
Apr 21, 9:30 PM EDTFlash Flood WarningLWXBerkeley, Jefferson5 hr

Nearby

Flash Flood Warnings in Virginia, 1992Every flash flood warning in 1992

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.