Alert archive / Maryland / Flash Flood Warnings in 1994

Flash Flood Warning 32, NWS Baltimore/Washington

August 17, 1994Washington County, Maryland; Morgan County, West Virginia

NWS Baltimore/Washington issued this flash flood warning at Aug 17, 1994, 3:53 PM EDT for Washington County, Maryland; Morgan County, West Virginia. It was in force for 3 hr.

The area

The counties it named.

The facts

Issued
Aug 17, 1994, 3:53 PM EDT (19:53 UTC)
Expired
Aug 17, 1994, 7:00 PM EDT
In force
3 hr
Issued by
NWS Baltimore/Washington
Area
Whole counties

Counties Washington County, MD, Morgan County, WV

The radar

The Sterling radar (KLWX), 82 km from the middle of the area, began a volume at 19:55 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

Pittsburgh, PA (KPIT), launched 12:00Z, 7.9 hours before the alert went out and 198 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, Pittsburgh, PA at 12:00Z on 1994-08-17Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 39 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, Pittsburgh, PA at 12:00Z on 1994-08-17The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 64 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
39 J/kg
Mixed-layer CIN
-71 J/kg
Mixed-layer LCL
1271 m above ground
0-6 km bulk shear
10 kt
0-1 km storm-relative helicity
64 m²/s²
0-3 km storm-relative helicity
74 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 Baltimore/Washington issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Aug 17, 12:49 PM EDTFlash Flood WarningLWXHighland2 hr
Aug 17, 2:43 PM EDTSevere Thunderstorm WarningLWXAlbemarle, Nelson32 min
Aug 17, 3:17 PM EDTFlash Flood WarningLWXAlbemarle, Nelson118 min
Aug 17, 3:17 PM EDTFlash Flood WarningLWXGreene, Madison, Page, Rockingham118 min
Aug 17, 3:17 PM EDTFlash Flood WarningLWXShenandoah118 min
Aug 17, 3:25 PM EDTSevere Thunderstorm WarningLWXRappahannock35 min
Aug 17, 3:53 PM EDTFlash Flood WarningLWXClarke, Frederick, Warren3 hr
Aug 17, 4:30 PM EDTFlash Flood WarningLWXCulpeper, Orange3 hr
Aug 17, 4:30 PM EDTFlash Flood WarningLWXFauquier, Rappahannock3 hr
Aug 17, 4:46 PM EDTSevere Thunderstorm WarningLWXWarren24 min
Aug 17, 5:01 PM EDTSevere Thunderstorm WarningLWXClarke, Frederick29 min
Aug 17, 6:33 PM EDTFlash Flood WarningLWXLoudoun117 min
Aug 17, 6:44 PM EDTSevere Thunderstorm WarningLWXLoudoun, Prince William46 min
Aug 17, 7:52 PM EDTFlash Flood WarningLWXOrange68 min
Aug 17, 10:45 AM EDTSevere Thunderstorm WarningLWXCalvert45 min
Aug 17, 11:46 AM EDTFlash Flood WarningLWXBaltimore, Harford119 min
Aug 17, 5:24 PM EDTSevere Thunderstorm WarningLWXBerkeley26 min
Aug 17, 6:19 PM EDTSevere Thunderstorm WarningLWXJefferson26 min

Nearby

Flash Flood Warnings in Maryland, 1994Flash Flood Warnings in West Virginia, 1994Every flash flood warning in 1994

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.