Alert archive / Virginia / Flash Flood Warnings in 1994

Flash Flood Warning 9, NWS Baltimore/Washington

June 21, 1994Albemarle County, Virginia

NWS Baltimore/Washington issued this flash flood warning at Jun 21, 1994, 5:06 PM EDT for Albemarle County, Virginia. It was in force for 2 hr.

The area

The counties it named.

The facts

Issued
Jun 21, 1994, 5:06 PM EDT (21:06 UTC)
Expired
Jun 21, 1994, 7:15 PM EDT
In force
2 hr
Issued by
NWS Baltimore/Washington
Area
Whole counties

County Albemarle County, VA

The radar

The Sterling radar (KLWX), 141 km from the middle of the area, began a volume at 21:10 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

Washington/Dulle, VA (KIAD), launched 12:00Z, 9.1 hours before the alert went out and 144 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 12:00Z on 1994-06-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 341 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, Washington/Dulle, VA at 12:00Z on 1994-06-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 125 square meters per square second.1939Sfc1 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
341 J/kg
Mixed-layer CIN
-41 J/kg
Mixed-layer LCL
613 m above ground
0-6 km bulk shear
24 kt
0-1 km storm-relative helicity
125 m²/s²
0-3 km storm-relative helicity
142 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.9

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 Baltimore/Washington issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jun 21, 3:53 PM EDTSevere Thunderstorm WarningLWXAlbemarle52 min
Jun 21, 4:35 PM EDTSevere Thunderstorm WarningLWXAlbemarle, Nelson40 min
Jun 21, 4:55 PM EDTSevere Thunderstorm WarningLWXOrange, Spotsylvania50 min
Jun 21, 5:32 PM EDTSevere Thunderstorm WarningLWXLoudoun43 min
Jun 21, 6:02 PM EDTSevere Thunderstorm WarningLWXFairfax, Fauquier, Loudoun, Prince William58 min
Jun 21, 6:25 PM EDTSevere Thunderstorm WarningLWXArlington65 min
Jun 21, 6:57 PM EDTSevere Thunderstorm WarningLWXCulpeper, Fauquier, Prince William, Stafford63 min
Jun 21, 6:57 PM EDTSevere Thunderstorm WarningLWXFairfax63 min
Jun 21, 6:02 PM EDTSevere Thunderstorm WarningLWXMontgomery58 min
Jun 21, 6:25 PM EDTSevere Thunderstorm WarningLWXCharles, Prince George's65 min
Jun 21, 7:48 PM EDTSevere Thunderstorm WarningLWXCalvert, Charles, Saint Mary's57 min

Nearby

Flash Flood Warnings in 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.