Alert archive / Virginia / Special Weather Statements in 2013

Special Weather Statement, NWS Blacksburg, VA

July 4, 2013Henry County, City of Martinsville, Virginia

NWS Blacksburg, VA issued this special weather statement at Jul 4, 2013, 8:07 PM EDT for Henry County, City of Martinsville, 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: Jul 4, 2013, 8:07 PM EDT (00:07 UTC)
Expired: Jul 4, 2013, 9:00 PM EDT
In force: 53 min
Issued by: NWS Blacksburg, VA

Counties City of Martinsville, VA, Henry County, VA

The nearest sounding before it

Roanoke, VA (KRNK), launched 00:00Z, 0.1 hours before the alert went out and 90 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: 653 J/kg
Mixed-layer CIN: -11 J/kg
Mixed-layer LCL: 817 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: 131 m²/s²
0-3 km storm-relative helicity: 149 m²/s²
Significant tornado parameter: 0.3
Supercell composite: 3.5

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 Jul 4, 4:33 PM EDT, 3 hours 34 minutes earlier.

Area forecast discussion, Jul 4, 4:33 PM EDT, 3 hours 34 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BLACKSBURG VA
433 PM EDT THU JUL 4 2013

.SYNOPSIS...
LOW PRESSURE WAS OVER THE MIDWEST WITH A WEAK FRONT EXTENDING TO
THE GULF COAST. A LARGE BERMUDA HIGH COVERED MUCH OF THE EASTERN
UNITED STATES. THE CENTER OF THE HIGH WILL GRADUALLY DRIFT CLOSER
TO THE COAST BY THIS WEEKEND.

&&

.NEAR TERM /THROUGH FRIDAY/...
AS OF 410 PM EDT THURSDAY...

AFTERNOON CONVECTION OVER THE AREA ARE FOLLOWING THE TRACKS OF
THE OUTER RING OF HIGH PRESSURE CENTER CLOSE TO BERMUDA. UNLIKE
THE LAST COUPLE OF DAYS...CONVECTION IS MORE SCATTERED THIS
AFTERNOON. THE AXIS OF RAIN THAT WAS OVER THE AREA EARLIER THIS
WEEK HAS MOVED WEST OVER THE TENN-OHIO VALLEYS. THE RAIN THAT FELL
IN THE PAST 48 HOURS HAS THE GROUND SATURATED WITH
CREEKS...STREAMS AND RIVERS LEVELS ACROSS THE FOOTHILLS AND
MOUNTAIN COUNTIES RUNNING HIGH. ANY ADDITIONAL RAIN INTO THIS
EVENING WILL BRING LEVELS ABOVE BANKFULL AND CAUSE PROBLEMS IN
POOR DRAINAGE AREAS. THIS AFTERNOONS STORMS WILL FADE WITH SUNSET.
THE FLASH FLOOD THREAT WILL WANE FOR AREAS NORTH OF A LINE FROM
BLUEFIELD WV TO MT AIREY NC. MORE NUMEROUS SHOWERS COMING ACROSS
WESTERN NC WILL REMAIN OVERNIGHT WITH ADDITIONAL BANDS SETTING UP
ON FRIDAY FOR AREAS SOUTH OF A LINE FROM BLUEFIELD WV TO MT AIREY.
WITH A CONTINUING THREAT FOR MORE SHOWERS...WE HAVE EXTENDED THE
FLASH FLOOD WATCH FOR SW RNK CWA THROUGH 8P FRIDAY.

THE BERMUDA RIDGE WILL CONTINUE TO INFLUENCE THE AREAS WEATHER ON
FRIDAY. WITH A TROPICAL AIR MASS IN PLACE...AFTERNOON HEATING WILL
BRING BANDS OF SCATTERED CONVECTION BACK INTO THE AREA. A FEW
ISOLATED SHOWERS ARE POSSIBLE IN THE MORNING...THEN WILL PEPPER
THE REGION MORESO IN THE AFTERNOON.

&&

.SHORT TERM /FRIDAY NIGHT THROUGH SUNDAY NIGHT/...
AS OF 405 PM EDT THURSDAY...

THE UPPER LEVEL RIDGE CENTERED NEAR BERMUDA WILL CONTINUE TO
DRIFT TO THE WEST FRIDAY NIGHT AND SATURDAY. VERY HUMID AND
TROPICAL-LIKE ATMOSPHERE WILL LEAD TO ANOTHER ROUND OF SHOWERS AND
THUNDERSTORMS SATURDAY AFTERNOON. ON SUNDAY...THE RIDGE SINKS TO
THE SOUTHWEST TOWARD THE SOUTHEAST USA COAST. THIS JOG TO THE
SOUTHWEST WILL ALLOW THE UPPER LEVEL LOW OVER THE MID MISSISSIPPI
VALLEY TO MOVE TO NORTH OVER THE OHIO VALLEY. BY SUNDAY
NIGHT...THIS LOW WILL OPEN INTO A TROUGH AND BRING A MORE
TRADITIONAL THREAT OF SHOWERS FROM THE WEST- SOUTHWEST. SHORT
WAVES ASSOCIATED WITH THE TROUGH WILL BRING NUMEROUS SHOWERS AND
SCATTERED THUNDERSTORMS BACK INTO THE AREA SUNDAY AFTERNOON AND
EVENING. ADDING TO THE INSTABILITY WILL BE A LEE TROUGH IN THE
EAST.

&&

.LONG TERM /MONDAY THROUGH THURSDAY/...
AS OF 415 PM EDT THURSDAY...

UPPER LEVEL RIDGE IN THE WESTERN ATLANTIC IS EXPECTED TO START
MOVING TO THE EAST SUNDAY NIGHT AND MONDAY. ZONAL FLOW AND A HUMID
AIR MASS WILL BRING SHOWERS FROM THE OHIO VALLEY INTO THE AREA
THROUGH MOST OF NEXT WEEK. THESE SHOWERS AND THUNDERSTORMS WILL
MOSTLY BE CONFIDED TO THE PEAKING HEATING HOURS OF THE AFTERNOON
AND EVENING.

&&

.AVIATION /20Z THURSDAY THROUGH TUESDAY/...
AS OF 130 PM EDT THURSDAY...

REGIONAL RADAR MOSAIC SHOWS THE BULK OF THE MOISTURE IS NOW OUT
TO OUR WEST. SCATTERED SHOWERS AND AN ISOLATED THUNDERSTORM WILL
CONTINUE THIS AFTERNOON. SOME OF THE SHOWERS HAVE PRODUCED VERY
HEAVY RAINFALL AND REDUCED VISIBILITIES FOR A SHORT PERIOD.
CONDITIONS WILL BE VFR EXCEPT FOR BRIEF PERIODS OF MVFR/IFR UNDER
HEAVY SHOWERS. ADDED FOG INTO MOST AREAS FOR THE OVERNIGHT PERIOD
AS SATURATED SOILS AND HIGH DEWPOINTS WILL ONCE AGAIN CREATE SOME
AREAS OF FOG.

FROM PREVIOUS DISCUSSION...

LITTLE CHANGE IS EXPECTED IN THE STRENGTH AND POSITION OF AN
UPPER TROUGH WEST OF THE MISSISSIPPI RIVER AND UPPER LEVEL HIGH
PRESSURE OFF OF THE ATLANTIC COAST. THEREFORE THE AXIS OF
HEAVIEST/MOST WIDESPREAD RAINFALL WILL REMAIN OVER THE
MOUNTAINS...ALTHOUGH SCATTERED SHOWER ACTIVITY WILL STILL OCCUR
ACROSS THE PIEDMONTS DURING THE AFTERNOON AND EARLY EVENING.
RAINFALL WILL AGAIN BE LOCALLY HEAVY FOR ALL AIRPORTS...AND
CAPABLE OF QUICKLY REDUCING VISIBILITIES TO LESS THAN 1SM AS
DOWNPOURS PASS OVERHEAD.

STRATUS WITH MVFR TO IFR CEILINGS WILL REFORM AGAIN
OVERNIGHT...MAINLY AFTER MIDNIGHT. HIGH CONFIDENCE THAN MVFR
CEILINGS WILL DEVELOP BUT NOT AS SURE ABOUT CEILINGS AS LOW AS
IFR.

FOR FRIDAY INTO THE WEEKEND...THE WEATHER PATTERN WILL CONTINUE
TO SHIFT AS UPPER LEVEL HIGH PRESSURE BUILD OVER OUR AREA. AS
SUCH...THE BEST PROBABILITY OF PRECIPITATION WILL BE FROM THE BLUE
RIDGE WESTWARD...WHILE RAINFALL OVER THE EAST WILL BE MORE SPOTTY.
THE UPPER LEVEL TROUGH WILL FINALLY LIFT OUT OF THE AREA ON
MONDAY...BECOMING ABSORBED IN THE STRONGER WIND FLOW OVER THE
NORTHERN UNITED STATES.

&&

.HYDROLOGY...
AS OF 505 AM EDT THURSDAY...

FLASH FLOOD WATCH IS IN EFFECT FOR RNK FOOTHILLS AND MOUNTAIN
COUNTIES THROUGH 8PM THIS EVENING. THE FLASH FLOOD WATCH HAS BEEN
EXTENDED FOR AREAS SOUTH OF A LINE FROM BLUEFIELD WV TO MY AIREY
NC UNTIL 8PM FRIDAY EVENING.

FLOODING IS ONGOING ON TRIBUTARIES FLOWING INTO THE ROANOKE
NEW...AND WATAUGA RIVERS. MANY OF THE TRIBUTARIES HAVE RECEDED
BUT COULD SEE SECONDARY RISES FROM HEAVY RAIN THIS AFTERNOON AND
EVENING.

&&

.EQUIPMENT...
AS OF 430 PM EDT THURSDAY...

KFCX RADAR HAS WILL REMAIN DOWN UNTIL FURTHER NOTICE DUE TO A BAD
POWER SUPPLY. PART HAS BEEN ORDERED.

&&

.RNK WATCHES/WARNINGS/ADVISORIES...
VA...FLASH FLOOD WATCH UNTIL 8 PM EDT THIS EVENING FOR VAZ011-013-
     014-017>020-022>024-032-033-043.
     FLASH FLOOD WATCH THROUGH FRIDAY EVENING FOR VAZ007-009-010-
     012-015-016.
NC...FLASH FLOOD WATCH UNTIL 8 PM EDT THIS EVENING FOR NCZ004-020.
     FLASH FLOOD WATCH THROUGH FRIDAY EVENING FOR NCZ001>003-018-
     019.
WV...FLASH FLOOD WATCH UNTIL 8 PM EDT THIS EVENING FOR WVZ042>045.

&&

SYNOPSIS...RCS
NEAR TERM...RCS
SHORT TERM...KK/RCS
LONG TERM...RCS
AVIATION...CF
HYDROLOGY...PC
EQUIPMENT...RCS

Hazardous weather outlook, Jul 4, 3:23 PM EDT, 4 hours 44 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE BLACKSBURG VA
323 PM EDT THU JUL 4 2013

NCZ001>003-018-019-VAZ007-009-010-012-015-016-051930-
ASHE-ALLEGHANY NC-SURRY-WATAUGA-WILKES-TAZEWELL-SMYTH-BLAND-WYTHE-
GRAYSON-CARROLL-
323 PM EDT THU JUL 4 2013

...FLASH FLOOD WATCH IN EFFECT THROUGH FRIDAY EVENING...

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

.DAY ONE...THIS AFTERNOON AND TONIGHT.

PLEASE LISTEN TO NOAA WEATHER RADIO OR GO TO WEATHER.GOV ON THE
INTERNET FOR MORE INFORMATION ABOUT THE FOLLOWING HAZARDS.

   FLASH FLOOD WATCH.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY.

PLEASE LISTEN TO NOAA WEATHER RADIO OR GO TO WEATHER.GOV ON THE
INTERNET FOR MORE INFORMATION ABOUT THE FOLLOWING HAZARDS.

   FLASH FLOOD WATCH...THROUGH FRIDAY EVENING.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.

NCZ005-006-VAZ034-035-044>047-058-059-051930-
ROCKINGHAM-CASWELL-BEDFORD-AMHERST-PITTSYLVANIA-CAMPBELL-APPOMATTOX-
BUCKINGHAM-HALIFAX-CHARLOTTE-
323 PM EDT THU JUL 4 2013

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

.DAY ONE...THIS AFTERNOON AND TONIGHT.

THERE IS A LOW PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY.

THERE IS A LOW PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.

NCZ004-020-VAZ011-013-014-017>020-022>024-032-033-043-WVZ042>045-
051930-
STOKES-YADKIN-GILES-PULASKI-MONTGOMERY-FLOYD-CRAIG-ALLEGHANY VA-BATH-
ROANOKE-BOTETOURT-ROCKBRIDGE-PATRICK-FRANKLIN-HENRY-MERCER-SUMMERS-
MONROE-GREENBRIER-
323 PM EDT THU JUL 4 2013

...FLASH FLOOD WATCH IN EFFECT UNTIL 8 PM EDT THIS EVENING...

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

.DAY ONE...THIS AFTERNOON AND TONIGHT.

PLEASE LISTEN TO NOAA WEATHER RADIO OR GO TO WEATHER.GOV ON THE
INTERNET FOR MORE INFORMATION ABOUT THE FOLLOWING HAZARDS.

 FLASH FLOOD WATCH..INTO THIS EVENING.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY.

THERE IS A LOW PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.

RCS

In the hours before

Local storm report, Jul 4, 6:53 PM EDT, 1 hour 14 minutes before

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Local storm report, Jul 4, 7:41 PM EDT, 26 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BLACKSBURG VA
741 PM EDT THU JUL 04 2013

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0531 PM     TSTM WND DMG     5 ENE WALNUT COVE       36.32N 80.06W
07/04/2013                   STOKES             NC   911 CALL CENTER

            ONE TREE DOWN ON BRICKYARD ROAD

&&

PW

Local storm report, Jul 4, 7:46 PM EDT, 21 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BLACKSBURG VA
746 PM EDT THU JUL 04 2013

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0602 PM     TSTM WND DMG     5 ENE SANDY RIDGE       36.53N 80.04W
07/04/2013                   STOKES             NC   911 CALL CENTER

            ONE TREE DOWN ON AMOS TOWN ROAD

&&

PW

Local storm report, Jul 4, 7:54 PM EDT, 13 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BLACKSBURG VA
754 PM EDT THU JUL 04 2013

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0558 PM     TSTM WND DMG     5 W STONEVILLE          36.48N 80.00W
07/04/2013                   ROCKINGHAM         NC   911 CALL CENTER

            ONE TREE DOWN ON NORTH CAROLINA ROUTE 770 CLOSE TO THE
            INTERSECTION OF NICK ROAD

&&

PW

Local storm report, Jul 4, 7:58 PM EDT, 9 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BLACKSBURG VA
758 PM EDT THU JUL 04 2013

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0558 PM     TSTM WND DMG     1 ENE AYERSVILLE        36.49N 80.01W
07/04/2013                   ROCKINGHAM         NC   911 CALL CENTER

            ONE TREE DOWN ON MEANS CREEK ROAD

&&

PW

Special weather statement, Jul 4, 8:07 PM EDT, 0 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BLACKSBURG VA
807 PM EDT THU JUL 4 2013

NCZ004-005-VAZ032-043-050100-
STOKES NC-ROCKINGHAM NC-HENRY VA-PATRICK VA-
807 PM EDT THU JUL 4 2013

THE NATIONAL WEATHER SERVICE IN BLACKSBURG HAS ISSUED A

* SPECIAL WEATHER STATEMENT FOR...
  NORTHEASTERN STOKES COUNTY IN NORTH CENTRAL NORTH CAROLINA...
  NORTHWESTERN ROCKINGHAM COUNTY IN NORTH CENTRAL NORTH CAROLINA...
  CENTRAL HENRY COUNTY IN SOUTH CENTRAL VIRGINIA...
  SOUTHEASTERN PATRICK COUNTY IN SOUTHWEST VIRGINIA...

* UNTIL 900 PM EDT

* AT 800 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS
  TRACKING AN INTENSE SHOWER NEAR MAYODAN...MOVING TO THE NORTH AT
  30 MPH.

* WIND GUSTS UP TO 30 MPH ARE EXPECTED WITH THIS SHOWER...ALONG WITH
  A VERY HEAVY DOWNPOUR OF RAIN.

* LOCATIONS IMPACTED INCLUDE...
  AYERSVILLE
  COLLINSVILLE...
  MARTINSVILLE CITY...
  SANDY RIDGE...
  SPENCER...
  RIDGEWAY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS SHOWER MAY INTENSIFY INTO A STRONG THUNDERSTORM...SO
MONITOR LOCAL RADIO AND TELEVISION FOR ADDITIONAL INFORMATION...AND
POSSIBLE WARNINGS...FROM THE NATIONAL WEATHER SERVICE.

&&

LAT...LON 3636 7990 3634 8013 3670 8028 3674 7980
TIME...MOT...LOC 2355Z 173DEG 27KT 3643 8003

11

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 4, 11:24 PM EDT	Special Weather Statement	RNK	Rockbridge, City of Buena Vista, City of Lexington	51 min
Jul 4, 11:40 PM EDT	Flash Flood Warning	RNK	Carroll, Patrick	4 hr
Jul 5, 3:16 PM EDT	Special Weather Statement	RNK	Henry, City of Martinsville	44 min
Jul 5, 5:15 PM EDT	Severe Thunderstorm Warning	RNK	Carroll, Grayson	60 min
Jul 5, 5:22 PM EDT	Special Weather Statement	RNK	Bedford, City of Buena Vista	38 min
Jul 5, 6:46 PM EDT	Special Weather Statement	RNK	City of Lynchburg	44 min
Jul 4, 9:31 PM EDT	Severe Thunderstorm Warning	RNK	Alleghany, Ashe, Watauga, Wilkes	59 min
Jul 4, 11:16 PM EDT	Special Weather Statement	RNK	Surry, Yadkin	59 min
Jul 5, 4:13 AM EDT	Areal Flood Warning	RNK	Ashe, Watauga	6 hr
Jul 5, 4:27 PM EDT	Special Weather Statement	RNK	Wilkes	48 min
Jul 5, 4:49 PM EDT	Areal Flood Advisory	RNK	Stokes, Surry, Yadkin	4 hr
Jul 5, 5:01 PM EDT	Special Weather Statement	RNK	Watauga	44 min
Jul 5, 5:12 PM EDT	Flash Flood Warning	RNK	Yadkin	4 hr
Jul 5, 5:50 PM EDT	Special Weather Statement	RNK	Watauga	40 min
Jul 5, 7:57 PM EDT	Areal Flood Advisory	RNK	Caswell, Rockingham, Stokes, Yadkin	108 min

Nearby

Special Weather Statements in 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.