Alert archive / Virginia / Flash Flood Warnings in 2001

Flash Flood Warning 5, NWS Blacksburg, VA

May 17, 2001Giles County, Virginia

NWS Blacksburg, VA issued this flash flood warning at May 17, 2001, 10:14 PM EDT for Giles 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
May 17, 2001, 10:14 PM EDT (02:14 UTC)
Expired
May 18, 2001, 12:15 AM EDT
In force
2 hr
Issued by
NWS Blacksburg, VA
Area
Whole counties

County Giles County, VA

The radar

The Roanoke radar (KFCX), 50 km from the middle of the area, began a volume at 02:13 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 00:00Z, 2.2 hours before the alert went out and 107 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 00:00Z on 2001-05-18Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1 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, Roanoke, VA at 00:00Z on 2001-05-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 214 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
1 J/kg
Mixed-layer CIN
-355 J/kg
Mixed-layer LCL
453 m above ground
0-6 km bulk shear
22 kt
0-1 km storm-relative helicity
214 m²/s²
0-3 km storm-relative helicity
204 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 180216
FFWRNK
VAC071-180415-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE BLACKSBURG VA
1014 PM EDT THU MAY 17 2001

THE NATIONAL WEATHER SERVICE IN BLACKSBURG HAS REISSUED A

* FLASH FLOOD WARNING FOR...
  WESTERN GILES COUNTY IN SOUTHWEST VIRGINIA...

* UNTIL 1215 AM EDT.

LAW ENFORCEMENT OFFICIALS INDICATED THAT FLOODING WAS CONTINUING 
ALONG WOLF AND WALKER CREEKS IN WESTERN GILES COUNTY. SEVERAL ROADS 
THAT CROSS THESE CREEKS WERE STILL CLOSED...AND SOME EVACUATIONS 
WERE STILL TAKING PLACE.  EXPECT WATER TO REMAIN HIGH THROUGH ABOUT 
MIDNIGHT.

<<CALL TO ACTION>>BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER 
TO RECOGNIZE THE DANGERYS OF FLASH FLOODS.

.END
09

The office that day

Everything else NWS Blacksburg, VA issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 18, 6:24 PM EDTSevere Thunderstorm WarningRNKPittsylvania36 min
May 18, 6:52 PM EDTSevere Thunderstorm WarningRNKHalifax, Pittsylvania38 min
May 18, 7:27 PM EDTSevere Thunderstorm WarningRNKHalifax48 min

Nearby

Flash Flood Warnings in Virginia, 2001Every flash flood warning in 2001

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.