Alert archive / Virginia / Flash Flood Warnings in 1998

Flash Flood Warning 20, NWS Baltimore/Washington

January 28, 1998Albemarle County, Greene County, Nelson County, Virginia

NWS Baltimore/Washington issued this flash flood warning at Jan 28, 1998, 11:13 AM EST for Albemarle County, Greene County, Nelson County, Virginia. It was in force for 4 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Jan 28, 1998, 11:13 AM EST (16:13 UTC)
Expired
Jan 28, 1998, 3:15 PM EST
In force
4 hr
Issued by
NWS Baltimore/Washington
Area
Whole counties

Counties Albemarle County, VA, Greene County, VA, Nelson County, VA

The radar

The Sterling radar (KLWX), 145 km from the middle of the area, began a volume at 16:13 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

Roanoke, VA (KRNK), launched 12:00Z, 4.2 hours before the alert went out and 120 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, Roanoke, VA at 12:00Z on 1998-01-28Temperature 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 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Roanoke, VA at 12:00Z on 1998-01-28The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 127 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
524 m above ground
0-6 km bulk shear
41 kt
0-1 km storm-relative helicity
127 m²/s²
0-3 km storm-relative helicity
177 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
Jan 28, 11:13 AM ESTFlash Flood WarningLWXPage, Rappahannock4 hr
Jan 28, 12:07 PM ESTFlash Flood WarningLWXClarke, Culpeper, Fauquier, Loudoun, Prince William, Stafford and 1 more4 hr
Jan 28, 12:07 PM ESTFlash Flood WarningLWXSpotsylvania, City of Fredericksburg4 hr
Jan 28, 12:07 PM ESTFlash Flood WarningLWXMadison, Orange4 hr
Jan 28, 12:07 PM ESTFlash Flood WarningLWXFairfax, City of Fairfax4 hr
Jan 28, 12:07 PM ESTFlash Flood WarningLWXArlington, City of Alexandria, City of Falls Church4 hr
Jan 28, 12:07 PM ESTFlash Flood WarningLWXCity of Manassas, City of Manassas Park4 hr
Jan 28, 12:07 PM ESTFlash Flood WarningLWXPrince George's4 hr

Nearby

Flash Flood Warnings in Virginia, 1998Every flash flood warning in 1998

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.