Alert archive / Virginia / Flash Flood Warnings in 2002

Flash Flood Warning 13, NWS Baltimore/Washington

May 27, 2002Rockingham County, City of Harrisonburg, Virginia

NWS Baltimore/Washington issued this flash flood warning at May 27, 2002, 3:42 PM EDT for Rockingham County, City of Harrisonburg, Virginia. It was in force for 2 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: May 27, 2002, 3:42 PM EDT (19:42 UTC)
Expired: May 27, 2002, 5:45 PM EDT
In force: 2 hr
Issued by: NWS Baltimore/Washington
Area: Whole counties

Counties City of Harrisonburg, VA, Rockingham County, VA

The nearest sounding before it

Washington/Dulle, VA (KIAD), launched 12:00Z, 7.7 hours before the alert went out and 138 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 99 J/kg
Mixed-layer CIN: -179 J/kg
Mixed-layer LCL: 1045 m above ground
0-6 km bulk shear: 9 kt
0-1 km storm-relative helicity: -16 m²/s²
0-3 km storm-relative helicity: 54 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.9

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
WGUS51 KLWX 271942
FFWLWX
VAC165-660-272145-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE BALTIMORE/WASHINGTON
341 PM EDT MON MAY 27 2002

THE NATIONAL WEATHER SERVICE IN STERLING VIRGINIA HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  CITY OF HARRISONBURG IN WESTERN VIRGINIA
  ROCKINGHAM COUNTY IN WESTERN VIRGINIA

* UNTIL 545 PM EDT.

* AT 339 PM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  THUNDERSTORM WITH VERY HEAVY RAINFALL.

SLOW MOVING THUNDERSTORMS ARE PRODUCING TORRENTIAL RAINFALL IN THE
WARNED AREA. RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH 
FLOODING...ESPECIALLY JUST WEST OF HARRISONBURG.

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. VEHICLES CAUGHT IN RISING WATER SHOULD BE ABANDONED. MOVE TO
HIGHER GROUND.

$$

HTS

The office that day

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

Issued	Product	Office	Counties	Lasted
May 26, 8:48 PM EDT	Severe Thunderstorm Warning	LWX	Fauquier	42 min
May 26, 8:53 PM EDT	Severe Thunderstorm Warning	LWX	Fairfax, Loudoun, Prince William	52 min
May 26, 9:48 PM EDT	Severe Thunderstorm Warning	LWX	Fairfax, Loudoun, City of Fairfax, City of Manassas, City of Manassas Park	42 min
May 26, 9:58 PM EDT	Flash Flood Warning	LWX	Shenandoah	62 min
May 26, 10:19 PM EDT	Flash Flood Warning	LWX	Fairfax, City of Fairfax	86 min
May 27, 4:50 AM EDT	Flash Flood Warning	LWX	Loudoun	115 min
May 27, 3:23 PM EDT	Severe Thunderstorm Warning	LWX	Rockingham	37 min
May 27, 3:26 PM EDT	Flash Flood Warning	LWX	Nelson	2 hr
May 27, 4:13 PM EDT	Severe Thunderstorm Warning	LWX	Albemarle	32 min
May 27, 4:23 PM EDT	Flash Flood Warning	LWX	Albemarle	67 min
May 27, 4:54 PM EDT	Severe Thunderstorm Warning	LWX	Frederick, Shenandoah	36 min
May 27, 5:32 PM EDT	Flash Flood Warning	LWX	Shenandoah	118 min
May 27, 6:44 PM EDT	Severe Thunderstorm Warning	LWX	Fauquier	31 min
May 27, 6:58 PM EDT	Flash Flood Warning	LWX	Stafford	2 hr
May 27, 7:14 PM EDT	Severe Thunderstorm Warning	LWX	Prince William, City of Manassas, City of Manassas Park	31 min

Nearby

Flash Flood Warnings in Virginia, 2002 Every flash flood warning in 2002

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.