Alert archive / North Carolina / Special Weather Statements in 2012

Special Weather Statement, NWS Blacksburg, VA

July 25, 2012Grayson County, Virginia; Alleghany County, Ashe County, North Carolina

NWS Blacksburg, VA issued this special weather statement at Jul 25, 2012, 2:43 AM EDT for Grayson County, Virginia; Alleghany County, Ashe County, North Carolina. It was in force for 47 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 25, 2012, 2:43 AM EDT (06:43 UTC)
Expired: Jul 25, 2012, 3:30 AM EDT
In force: 47 min
Issued by: NWS Blacksburg, VA

Counties Alleghany County, NC, Ashe County, NC, Grayson County, VA

The radar

The Roanoke radar (KFCX), 109 km from the middle of the area, began a volume at 06:44 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, 6.7 hours before the alert went out and 128 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: 44 J/kg
Mixed-layer CIN: -486 J/kg
Mixed-layer LCL: 1440 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: 179 m²/s²
0-3 km storm-relative helicity: 217 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.

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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 25, 2:15 AM EDT, 28 minutes earlier.

Area forecast discussion, Jul 25, 2:15 AM EDT, 28 minutes before

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Hazardous weather outlook, Jul 24, 11:57 PM EDT, 2 hours 46 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE BLACKSBURG VA
1157 PM EDT TUE JUL 24 2012

NCZ003-004-019-020-VAZ011-013-014-016>020-022>024-032-260400-
SURRY-STOKES-WILKES-YADKIN-GILES-PULASKI-MONTGOMERY-CARROLL-FLOYD-
CRAIG-ALLEGHANY VA-BATH-ROANOKE-BOTETOURT-ROCKBRIDGE-PATRICK-
1157 PM EDT TUE JUL 24 2012

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

.DAY ONE...TONIGHT.

HAZARDOUS WEATHER IS NOT EXPECTED AT THIS TIME.

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

ISOLATED TO SCATTERED THUNDERSTORMS ARE EXPECTED EACH DAY THROUGH
THE PERIOD. THE BEST CHANCE FOR THUNDERSTORMS WILL BE WEDNESDAY
AND FRIDAY.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.

NCZ001-002-018-VAZ007-009-010-012-015-WVZ042>045-260400-
ASHE-ALLEGHANY NC-WATAUGA-TAZEWELL-SMYTH-BLAND-WYTHE-GRAYSON-MERCER-
SUMMERS-MONROE-GREENBRIER-
1157 PM EDT TUE JUL 24 2012

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

.DAY ONE...TONIGHT.

THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW AT THIS
TIME.

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

ISOLATED TO SCATTERED THUNDERSTORMS ARE EXPECTED EACH DAY THROUGH
THE PERIOD. THE BEST CHANCE FOR THUNDERSTORMS WILL BE WEDNESDAY
AND FRIDAY.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.

NCZ005-006-VAZ033>035-043>047-058-059-260400-
ROCKINGHAM-CASWELL-FRANKLIN-BEDFORD-AMHERST-HENRY-PITTSYLVANIA-
CAMPBELL-APPOMATTOX-BUCKINGHAM-HALIFAX-CHARLOTTE-
1157 PM EDT TUE JUL 24 2012

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

.DAY ONE...TONIGHT.

HAZARDOUS WEATHER IS NOT EXPECTED AT THIS TIME.

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

ISOLATED TO SCATTERED THUNDERSTORMS ARE EXPECTED EACH DAY THROUGH
THE PERIOD. THE BEST CHANCE FOR THUNDERSTORMS WILL BE WEDNESDAY
AND FRIDAY.

HEAT INDICES THURSDAY AFTERNOON ARE EXPECTED TO REACH 100 TO 105
ACROSS THIS REGION...WITH AREAS FROM MARTINSVILLE TO APPOMATTOX
POTENTIALLY SEEING HEAT INDICES OF 105 TO 109. A HEAT ADVISORY MAY
BE NEEDED FOR THIS AREA LATER IN THE WEEK.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.

In the hours before

Special weather statement, Jul 25, 1:16 AM EDT, 1 hour 27 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BLACKSBURG VA
116 AM EDT WED JUL 25 2012

VAZ007-009-250615-
SMYTH VA-TAZEWELL VA-
116 AM EDT WED JUL 25 2012

...STRONG THUNDERSTORMS TO AFFECT SMYTH AND WESTERN TAZEWELL
COUNTIES...

AT 111 AM EDT...AN AREA OF STRONG THUNDERSTORM WAS MOVING INTO
NORTHWESTERN TAZEWELL COUNTY...JUST NORTH OF RICHLANDS. THE ACTIVITY
WAS MOVING SOUTHEAST AT 20 MPH.

WIND GUSTS TO 40 MPH AND FREQUENT CLOUD-TO-GROUND LIGHTNING...ALONG
WITH VERY HEAVY RAIN CAN BE EXPECTED WITH THIS ACTIVITY. DO NOT STAY
IN THE OPEN OR SEEK SHELTER UNDER TREES WHEN LIGHTNING
THREATENS...MOVE INDOORS WHEN A THUNDERSTORM APPROACHES.

THIS STORM WILL BE NEAR CLIFFIELD...AND CLAYPOOL HILL AROUND 120
AM...ALLISON GAP AROUND 140 AM...ASBERRYS...AND SALTVILLE AROUND 145
AM...BROADFORD...AND QUARRY AROUND 150 AM...HUNGRY MOTHER STATE
PARK...AND CHILHOWIE AROUND 205 AM AND NEBO AROUND 210 AM. PORTIONS
OF I-81 WILL BE IMPACTED WITH HEAVY RAIN BY 130 AM EDT.

LAT...LON 3724 8172 3703 8145 3690 8133 3689 8133
      3675 8169 3679 8170 3685 8176 3696 8181
      3696 8179 3705 8183 3709 8188 3713 8189

RAB

Special weather statement, Jul 25, 2:43 AM EDT, 0 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 25, 1:16 AM EDT	Special Weather Statement	RNK	Smyth	59 min
Jul 25, 2:04 AM EDT	Severe Thunderstorm Warning	RNK	Smyth	45 min
Jul 25, 2:38 AM EDT	Areal Flood Advisory	RNK	Smyth, Tazewell	3 hr
Jul 25, 5:41 PM EDT	Special Weather Statement	RNK	Smyth	19 min
Jul 25, 6:13 PM EDT	Special Weather Statement	RNK	Smyth, Tazewell	62 min
Jul 25, 3:23 AM EDT	Special Weather Statement	RNK	Watauga	67 min
Jul 25, 3:59 PM EDT	Special Weather Statement	RNK	Wilkes	61 min
Jul 25, 4:22 PM EDT	Special Weather Statement	RNK	Wilkes	38 min
Jul 25, 4:27 PM EDT	Severe Thunderstorm Warning	RNK	Wilkes, Yadkin	48 min

Nearby

Special Weather Statements in North Carolina, 2012 Special Weather Statements in Virginia, 2012 Every special weather statement in 2012

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.