Alert archive / Virginia / Special Weather Statements in 2013

Special Weather Statement, NWS Blacksburg, VA

August 9, 2013Tazewell County, Virginia; Mercer County, West Virginia

NWS Blacksburg, VA issued this special weather statement at Aug 9, 2013, 12:18 PM EDT for Tazewell County, Virginia; Mercer County, West Virginia. It was in force for 57 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: Aug 9, 2013, 12:18 PM EDT (16:18 UTC)
Expired: Aug 9, 2013, 1:15 PM EDT
In force: 57 min
Issued by: NWS Blacksburg, VA

Counties Tazewell County, VA, Mercer County, WV

The radar

The Roanoke radar (KFCX), 93 km from the middle of the area, began a volume at 16:21 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, 4.3 hours before the alert went out and 156 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: 478 J/kg
Mixed-layer CIN: -6 J/kg
Mixed-layer LCL: 512 m above ground
0-6 km bulk shear: 23 kt
0-1 km storm-relative helicity: 119 m²/s²
0-3 km storm-relative helicity: 123 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.1

Open this sounding in Storm Lab

The text

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

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What forecasters said that day

The local office's own words before this special weather statement went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Blacksburg, VA wrote its last area forecast discussion before this special weather statement went out at Aug 9, 10:17 AM EDT, 2 hours 1 minute earlier.

Area forecast discussion, Aug 9, 10:17 AM EDT, 2 hours 1 minute before

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Hazardous weather outlook, Aug 9, 3:56 AM EDT, 8 hours 22 minutes before

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In the hours before

Special weather statement, Aug 9, 12:18 PM EDT, 0 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BLACKSBURG VA
1218 PM EDT FRI AUG 9 2013

VAZ007-010-011-WVZ042-043-091715-
GILES VA-BLAND VA-TAZEWELL VA-SUMMERS WV-MERCER WV-
1218 PM EDT FRI AUG 9 2013

THE NATIONAL WEATHER SERVICE IN BLACKSBURG HAS ISSUED A

* SPECIAL WEATHER STATEMENT FOR...
  WESTERN GILES COUNTY IN SOUTHWEST VIRGINIA...
  NORTHERN BLAND COUNTY IN SOUTHWEST VIRGINIA...
  TAZEWELL COUNTY IN SOUTHWEST VIRGINIA...
  SOUTHWESTERN SUMMERS COUNTY IN SOUTHEAST WEST VIRGINIA...
  MERCER COUNTY IN SOUTHEAST WEST VIRGINIA...

* UNTIL 115 PM EDT

* AT 1212 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS
  TRACKING A CLUSTER OF SHOWERS AND ISOLATED THUNDERSTORMS NEAR
  TIPTOP...MOVING TO THE EAST AT 30 MPH.

* VERY HEAVY RAIN IS FALLING...AND WILL CAUSE WATER TO POND ON
  ROADWAYS AND QUICKLY FILL ROADSIDE DITCHES AND SMALL STREAMS. A
  QUICK ONE HALF TO ONE INCH OF RAIN COULD OCCUR IN THE NEXT 30
  MINUTES TO ONE HALF AS THIS CLUSTER OF HEAVY RAIN PASSES THROUGH.

* LOCATIONS IMPACTED INCLUDE...
  ROCKY GAP...
  PRINCETON...
  BLUEFIELD...
  NARROWS...
  AND CAMP CREEK.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

PROLONGED HEAVY RAINFALL MAY CAUSE WATER TO FLOW OVER THE ROADWAY. DO
NOT DRIVE YOUR VEHICLE WHERE THE ROAD HAS BECOME FLOODED.

&&

LAT...LON 3721 8155 3726 8150 3727 8142 3731 8140
      3732 8137 3742 8131 3742 8128 3745 8129
      3760 8093 3746 8084 3743 8086 3740 8080
      3725 8070 3711 8159 3720 8163
TIME...MOT...LOC 1612Z 251DEG 28KT 3723 8154

JH

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 9, 3:22 PM EDT	Special Weather Statement	RNK	Bedford	23 min
Aug 9, 3:45 PM EDT	Severe Thunderstorm Warning	RNK	Bedford, Campbell, Pittsylvania	60 min
Aug 9, 4:18 PM EDT	Special Weather Statement	RNK	Charlotte	57 min
Aug 9, 6:43 PM EDT	Special Weather Statement	RNK	Henry, Patrick, City of Martinsville	62 min
Aug 9, 6:51 PM EDT	Special Weather Statement	RNK	Bland	54 min
Aug 9, 7:09 PM EDT	Flash Flood Warning	RNK	Patrick	6 hr
Aug 9, 7:45 PM EDT	Special Weather Statement	RNK	City of Lynchburg	45 min
Aug 9, 4:26 PM EDT	Special Weather Statement	RNK	Wilkes	34 min
Aug 9, 5:01 PM EDT	Areal Flood Advisory	RNK	Watauga, Wilkes	3 hr
Aug 9, 5:14 PM EDT	Special Weather Statement	RNK	Wilkes	46 min
Aug 9, 5:42 PM EDT	Areal Flood Advisory	RNK	Wilkes	3 hr
Aug 9, 5:48 PM EDT	Severe Thunderstorm Warning	RNK	Yadkin	57 min

Nearby

Special Weather Statements in Virginia, 2013 Special Weather Statements in West Virginia, 2013 Every special weather statement in 2013

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.