Alert archive / North Carolina / Severe Thunderstorm Warnings in 2014

Severe Thunderstorm Warning 165, NWS Blacksburg, VA

August 12, 2014Rockingham County, North Carolina

NWS Blacksburg, VA issued this severe thunderstorm warning at Aug 12, 2014, 4:03 PM EDT for Rockingham County, North Carolina. 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 counties it named.

The facts

Issued: Aug 12, 2014, 4:03 PM EDT (20:03 UTC)
Expired: Aug 12, 2014, 5:00 PM EDT
In force: 57 min
Issued by: NWS Blacksburg, VA
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

County Rockingham County, NC

The radar

The Roanoke radar (KFCX), 83 km from the middle of the area, began a volume at 20:03 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 12:00Z, 8.1 hours before the alert went out and 37 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: 386 J/kg
Mixed-layer CIN: -10 J/kg
Mixed-layer LCL: 477 m above ground
0-6 km bulk shear: 36 kt
0-1 km storm-relative helicity: 98 m²/s²
0-3 km storm-relative helicity: 82 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 0.8

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this severe thunderstorm warning 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 severe thunderstorm warning went out at Aug 12, 1:38 PM EDT, 2 hours 25 minutes earlier.

Area forecast discussion, Aug 12, 1:38 PM EDT, 2 hours 25 minutes before

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Hazardous weather outlook, Aug 12, 3:31 PM EDT, 32 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE BLACKSBURG VA
331 PM EDT TUE AUG 12 2014

NCZ004>006-VAZ023-024-033>035-043>047-058-059-131945-
STOKES-ROCKINGHAM-CASWELL-BOTETOURT-ROCKBRIDGE-FRANKLIN-BEDFORD-
AMHERST-HENRY-PITTSYLVANIA-CAMPBELL-APPOMATTOX-BUCKINGHAM-HALIFAX-
CHARLOTTE-
331 PM EDT TUE AUG 12 2014

THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTH CENTRAL NORTH
CAROLINA...CENTRAL VIRGINIA...SOUTH CENTRAL VIRGINIA AND WEST
CENTRAL VIRGINIA.

.DAY ONE...THIS AFTERNOON AND TONIGHT.

PERIODIC BANDS OF SHOWERS AND THUNDERSTORMS WILL OCCUR INTO EARLY
THIS EVENING. A FEW OF THE STORMS COULD BECOME STRONG TO
SEVERE...PRODUCING DAMAGING WIND GUSTS. VERY HEAVY RAINFALL MAY
ALSO RESULT IN LOCALIZED FLOODING.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY.

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.

NCZ001>003-018>020-VAZ007-009>020-022-032-WVZ042>045-131945-
ASHE-ALLEGHANY NC-SURRY-WATAUGA-WILKES-YADKIN-TAZEWELL-SMYTH-BLAND-
GILES-WYTHE-PULASKI-MONTGOMERY-GRAYSON-CARROLL-FLOYD-CRAIG-
ALLEGHANY VA-BATH-ROANOKE-PATRICK-MERCER-SUMMERS-MONROE-GREENBRIER-
331 PM EDT TUE AUG 12 2014

THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTH CENTRAL NORTH
CAROLINA...NORTHWEST NORTH CAROLINA...SOUTHWEST VIRGINIA...WEST
CENTRAL VIRGINIA AND SOUTHEAST WEST VIRGINIA.

.DAY ONE...THIS AFTERNOON AND TONIGHT.

SHOWERS AND THUNDERSTORMS MAY RESULT IN LOCALLY HEAVY RAINFALL
THAT COULD PRODUCE LOCALIZED FLOODING THROUGH THIS EVENING. IN
ADDITION...ISOLATED STRONG TO SEVERE STORMS CONTAINING STRONG
WINDS MAY OCCUR AS THE COLD FRONT PASSING OVER THE MOUNTAINS.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY.

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.

In the hours before

Special weather statement, Aug 12, 12:36 PM EDT, 3 hours 27 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BLACKSBURG VA
1236 PM EDT TUE AUG 12 2014

VAZ016-017-032-033-121715-
FRANKLIN VA-FLOYD VA-PATRICK VA-CARROLL VA-
1236 PM EDT TUE AUG 12 2014

THE NATIONAL WEATHER SERVICE IN BLACKSBURG HAS ISSUED A

* SPECIAL WEATHER STATEMENT FOR...
  WESTERN FRANKLIN COUNTY IN WEST CENTRAL VIRGINIA...
  FLOYD COUNTY IN SOUTHWEST VIRGINIA...
  CENTRAL PATRICK COUNTY IN SOUTHWEST VIRGINIA...
  SOUTHEASTERN CARROLL COUNTY IN SOUTHWEST VIRGINIA...

* UNTIL 115 PM EDT

* AT 1233 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS
  TRACKING A DEVELOPING THUNDERSTORM BETWEEN FLOYD AND
  HILLSVILLE...MOVING TO THE EAST AT 25 MPH.

* WIND GUSTS UP TO 30 MPH ARE EXPECTED WITH THIS STORM.

* LOCATIONS IMPACTED INCLUDE...
  FERRUM...
  FLOYD...
  WILLIS...
  WOOLWINE...
  AND BOONES MILL.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS STORM WILL LIKELY INTENSIFY...SO MONITOR LOCAL RADIO AND
TELEVISION FOR ADDITIONAL INFORMATION...AND POSSIBLE WARNINGS...FROM
THE NATIONAL WEATHER SERVICE.

&&

LAT...LON 3661 8065 3696 8049 3717 7985 3679 8004
      3678 8010 3670 8008 3666 8010
TIME...MOT...LOC 1630Z 255DEG 20KT 3690 8038

PM

Special weather statement, Aug 12, 3:16 PM EDT, 47 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BLACKSBURG VA
316 PM EDT TUE AUG 12 2014

NCZ004-005-VAZ043-044-122015-
ROCKINGHAM NC-STOKES NC-HENRY VA-PITTSYLVANIA VA-
316 PM EDT TUE AUG 12 2014

THE NATIONAL WEATHER SERVICE IN BLACKSBURG HAS ISSUED A

* SPECIAL WEATHER STATEMENT FOR...
  ROCKINGHAM COUNTY IN NORTH CENTRAL NORTH CAROLINA...
  SOUTHEASTERN STOKES COUNTY IN NORTH CENTRAL NORTH CAROLINA...
  SOUTHEASTERN HENRY COUNTY IN SOUTH CENTRAL VIRGINIA...
  SOUTHWESTERN PITTSYLVANIA COUNTY IN SOUTH CENTRAL VIRGINIA...

* UNTIL 415 PM EDT

* AT 315 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS
  TRACKING THUNDERSTORMS WITH VERY HEAVY DOWNPOURS ALONG A LINE
  EXTENDING FROM NEAR RIDGEWAY TO NEAR KING...MOVING TO THE EAST AT
  25 MPH.

*

* LOCATIONS IMPACTED INCLUDE...
  MAYFIELD...
  EDEN...
  WENTWORTH...
  MADISON...
  AND AXTON.

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 3626 8035 3668 7977 3666 7933 3654 7948
      3654 7951 3652 7951 3625 7985
TIME...MOT...LOC 1911Z 257DEG 22KT 3660 7985 3624 8034

MBS

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 12, 12:43 AM EDT	Special Weather Statement	RNK	Grayson, Smyth, Tazewell	62 min
Aug 12, 2:26 AM EDT	Special Weather Statement	RNK	Smyth	49 min
Aug 12, 4:02 AM EDT	Special Weather Statement	RNK	Wythe	58 min
Aug 12, 12:36 PM EDT	Special Weather Statement	RNK	Floyd, Patrick	39 min
Aug 12, 4:17 PM EDT	Special Weather Statement	RNK	City of Danville	43 min
Aug 12, 3:16 PM EDT	Special Weather Statement	RNK	Rockingham	59 min
Aug 12, 3:56 PM EDT	Areal Flood Advisory	RNK	Rockingham	6 hr
Aug 12, 4:27 PM EDT	Special Weather Statement	RNK	Caswell	48 min
Aug 12, 4:36 PM EDT	Severe Thunderstorm Warning	RNK	Caswell	69 min
Aug 12, 1:51 AM EDT	Special Weather Statement	RNK	Mercer	54 min

Nearby

Severe Thunderstorm Warnings in North Carolina, 2014 Every severe thunderstorm warning 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.