Alert archive / Virginia / Flash Flood Warnings in 2002

Flash Flood Warning 19, NWS Blacksburg, VA

June 24, 2002Montgomery County, Virginia

NWS Blacksburg, VA issued this flash flood warning at Jun 24, 2002, 8:03 PM EDT for Montgomery County, 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: Jun 24, 2002, 8:03 PM EDT (00:03 UTC)
Expired: Jun 24, 2002, 10:30 PM EDT
In force: 2 hr
Issued by: NWS Blacksburg, VA
Area: Whole counties

County Montgomery County, VA

The radar

The Roanoke radar (KFCX), 19 km from the middle of the area, began a volume at 00:04 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 00:00Z, 0.1 hours before the alert went out and 79 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: 163 J/kg
Mixed-layer CIN: -1 J/kg
Mixed-layer LCL: 1380 m above ground
0-6 km bulk shear: 16 kt
0-1 km storm-relative helicity: 25 m²/s²
0-3 km storm-relative helicity: 25 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

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

000 
WGUS51 KRNK 250003
FFWRNK
VAC121-250230-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE BLACKSBURG VA
800 PM EDT MON JUN 24 2002

THE NATIONAL WEATHER SERVICE IN BLACKSBURG HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  CENTRAL MONTGOMERY COUNTY IN SOUTHWEST VIRGINIA

* UNTIL 1030 PM EDT

* AT 800 PM EDT...NATIONAL WEATHER SERVICE RADAR INDICATED HEAVY 
  RAIN CONTINUING OVER CENTRAL PORTIONS OF MONTGOMERY COUNTY. THE 
  BLACKSBURG NATIONAL WEATHER SERVICE OFFICE HAS MEASURED OVER 2 
  INCHES OF RAIN BETWEEN 725 PM AND 800 PM. ADDITIONAL HEAVY RAIN 
  WILL LIKELY RESULT IN FLASH FLOODING.

* LOCATIONS THREATENED BY HEAVY RAIN INCLUDE...BLACKSBURG AND 
  MERRIMAC...

<<CALL TO ACTION>>DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE
WATER COVERS THE ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW
YOUR CAR TO CROSS SAFELY. VEHICLES CAUGHT IN RISING WATER SHOULD BE
ABANDONED QUICKLY. MOVE TO HIGHER GROUND.

RELAY REPORTS OF FLOODING TO THE NATIONAL WEATHER SERVICE IN IN
BLACKSBURG BY CALLING TOLL FREE...1...8 6 6...2 1 5...4 3 2 4.

$$

03

LAT...LON 3721 8051 3715 8044 3717 8030 3727 8042

2 follow-up statements

000 
WGUS71 KRNK 250033
FFSRNK
VAC121-250130-

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE BLACKSBURG VA
832 PM EDT MON JUN 24 2002

...FLASH FLOOD WARNING CONTINUES UNTIL 1030 PM EDT...

AT 830 PM EDT...BLACKSBURG DOPPLER RADAR SHOWED LIGHT TO MODERATE 
RAIN ACROSS CENTRAL MONTGOMERY COUNTY. THE MONTGOMERY COUNTY 
SHERIFFS OFFICE REPORT THAT MERRIMAC ROAD WAS FLOODED. RUNOFF FROM 
THE NEARLY THREE INCHES OF RAIN THAT FELL IN AREAS JUST SOUTH AND 
SOUTHWEST OF BLACKSBURG WILL CONTINUE TO CAUSE FLASH FLOODING 
THROUGH AT LEAST 930 PM. 

RELAY YOUR REPORTS OF FLOODING TO THE NATIONAL WEATHER SERVICE BY
CALLING TOLL FREE...1...8 6 6...2 1 5...4 3 2 4.

MTE

$$

LAT...LON 3717 8053 3710 8042 3723 8026 3726 8041

000 
WGUS71 KRNK 250155 CCA
FFSRNK
VAC121-250215-

FLASH FLOOD STATEMENT...CORRECTED FOR COUNTY CODE
NATIONAL WEATHER SERVICE BLACKSBURG VA
948 PM EDT MON JUN 24 2002

...FLASH FLOOD WARNING IS CANCELLED...

AT 945 PM EDT...BLACKSBURG DOPPLER RADAR INDICTED RAIN HAS ENDED IN 
MONTGOMERY COUNTY...AND ANY FLOOD WATERS ON SMALL CREEKS AND LOW 
LYING AREAS SHOULD BE RAPIDLY RECEDING AS RUNOFF DUE TO EARLY HEAVY 
RAINFALL HAS TAPERED OFF.  THEREFORE...THE FLASH FLOOD WARNING HAS 
BEEN CANCELLED. 

NO MORE RAIN IS EXPECTED TONIGHT...HOWEVER LOW LYING AREAS ON 
ROADWAYS AND INTERSECTIONS NEAR BLACKSBURG AND CHRISTIANSBURG MAY 
STILL HAVE STANDING WATER FOR THE NEXT COUPLE OF HOURS. 

SK

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; radar from the NEXRAD Level II archive.