Alert archive / Virginia / Flash Flood Warnings in 1990

Flash Flood Warning 3, NWS Baltimore/Washington

July 11, 1990Culpeper County, Madison County, Orange County, Virginia

NWS Baltimore/Washington issued this flash flood warning at Jul 11, 1990, 6:08 PM EDT for Culpeper County, Madison County, Orange County, Virginia. It was in force for 2 hr.

The area

The counties it named.

The facts

Issued
Jul 11, 1990, 6:08 PM EDT (22:08 UTC)
Expired
Jul 11, 1990, 8:15 PM EDT
In force
2 hr
Issued by
NWS Baltimore/Washington
Area
Whole counties

Counties Culpeper County, VA, Madison County, VA, Orange 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

Washington/Dulle, VA (KIAD), launched 12:00Z, 10.1 hours before the alert went out and 87 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 1990-07-11Temperature 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, Washington/Dulle, VA at 12:00Z on 1990-07-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 77 square meters per square second.193958Sfc1 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
1194 m above ground
0-6 km bulk shear
33 kt
0-1 km storm-relative helicity
77 m²/s²
0-3 km storm-relative helicity
164 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.1

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
Jul 11, 5:25 PM EDTSevere Thunderstorm WarningLWXCharles, Saint Mary's65 min
Jul 11, 3:23 PM EDTSevere Thunderstorm WarningLWXCulpeper, Greene, Madison, Orange67 min
Jul 11, 4:54 PM EDTSevere Thunderstorm WarningLWXKing George, Stafford66 min
Jul 11, 6:08 PM EDTFlash Flood WarningLWXGreene2 hr

Nearby

Flash Flood Warnings in Virginia, 1990Every flash flood warning in 1990

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.