Alert archive / Virginia / Special Weather Statements in 2014

Special Weather Statement, NWS Blacksburg, VA

September 13, 20146 counties in Virginia

NWS Blacksburg, VA issued this special weather statement at Sep 13, 2014, 2:07 AM EDT for 6 counties in Virginia. It was in force for 53 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Sep 13, 2014, 2:07 AM EDT (06:07 UTC)
Expired
Sep 13, 2014, 3:00 AM EDT
In force
53 min
Issued by
NWS Blacksburg, VA

Counties Carroll County, VA, City of Radford, VA, Floyd County, VA, Montgomery County, VA, Patrick County, VA, Pulaski County, VA

The radar

The Roanoke radar (KFCX), 40 km from the middle of the area, began a volume at 06:07 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

Greensboro/Hi Pt, NC (KGSO), launched 00:00Z, 6.1 hours before the alert went out and 97 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, Greensboro/Hi Pt, NC at 00:00Z on 2014-09-13Temperature 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°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Greensboro/Hi Pt, NC at 00:00Z on 2014-09-13The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 32 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
-116 J/kg
Mixed-layer LCL
796 m above ground
0-6 km bulk shear
21 kt
0-1 km storm-relative helicity
32 m²/s²
0-3 km storm-relative helicity
98 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.

813 
WWUS81 KRNK 130607
SPSRNK

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BLACKSBURG VA
207 AM EDT SAT SEP 13 2014
 
VAZ012>014-016-017-032-033-130700-
FRANKLIN VA-FLOYD VA-PATRICK VA-CARROLL VA-MONTGOMERY VA-PULASKI VA-
WYTHE VA-
207 AM EDT SAT SEP 13 2014

THE NATIONAL WEATHER SERVICE IN BLACKSBURG HAS ISSUED A

* SPECIAL WEATHER STATEMENT FOR...
  SOUTHWESTERN FRANKLIN COUNTY IN WEST CENTRAL VIRGINIA...
  FLOYD COUNTY IN SOUTHWESTERN VIRGINIA...
  PATRICK COUNTY IN SOUTHWESTERN VIRGINIA...
  CARROLL COUNTY IN SOUTHWESTERN VIRGINIA...
  MONTGOMERY COUNTY IN SOUTHWESTERN VIRGINIA...
  PULASKI COUNTY IN SOUTHWESTERN VIRGINIA...
  EASTERN WYTHE COUNTY IN SOUTHWESTERN VIRGINIA...

* UNTIL 300 AM EDT

* AT 200 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS 
  TRACKING AN AREA OF MODERATE TO HEAVY RAIN ALONG THE BLUE RIDGE OF 
  SOUTHWEST VIRGINIA INTO PORTIONS OF THE NEW RIVER VALLEY ALONG AND 
  EAST OF INTERSTATE 81. THIS AREA WAS MOVING TO THE NORTHEAST AT 20 
  MPH.

* LOCALLY HEAVY RAIN IS FALLING...AND MAY CAUSE WATER TO POND ON 
  ROADWAYS AND QUICKLY FILL ROADSIDE DITCHES AND SMALL STREAMS.

* LOCATIONS IMPACTED INCLUDE...
  HILLSVILLE...
  FANCY GAP...
  DUGSPUR...  
  BLACKSBURG... 
  PILOT... 
  CHRISTIANSBURG... 
  RADFORD...
  FLOYD...
  AND MEADOWS OF DAN. 

THIS INCLUDES VIRGINIA TECH.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

HEAVY RAIN AND PATCHY FOG CAN LIMIT VISIBILITIES TO LESS THAN A HUNDRED FEET. 
VISIBILITIES MAY BE ESPECIALLY LOW ALONG HIGHER RIDGES.YOU MAY ENCOUNTER 
ROADWAY HAZARDS WITHOUT HAVING ADEQUATE TIME TO SAFELY AVOID THEM. IF YOU MUST 
DRIVE...DO SO AT LOW SPEED AND USE LOW BEAM HEADLIGHTS. MAINTAIN EXTRA SEPARATION
BETWEEN YOURSELF AND SURROUNDING VEHICLES.

&&

LAT...LON 3656 8068 3656 8082 3691 8106 3732 8033
      3686 7998 3655 8045
TIME...MOT...LOC 0559Z 233DEG 18KT 3682 8062 

$$

SK

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 12, 9:24 PM EDTAreal Flood AdvisoryRNKGrayson6 hr
Sep 13, 1:06 AM EDTSpecial Weather StatementRNKCarroll, City of Galax54 min
Sep 13, 3:14 AM EDTSpecial Weather StatementRNKCraig, Floyd, Montgomery, Roanoke, City of Radford, City of Roanoke and 1 more61 min
Sep 13, 4:16 AM EDTSpecial Weather StatementRNKFranklin, Henry, Patrick59 min
Sep 12, 10:48 PM EDTAreal Flood AdvisoryRNKWatauga, Wilkes6 hr
Sep 12, 11:38 PM EDTFlash Flood WarningRNKWatauga, Wilkes6 hr
Sep 13, 12:11 AM EDTSpecial Weather StatementRNKAlleghany64 min

Nearby

Special Weather Statements in Virginia, 2014Every special weather statement in 2014

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.