Alert archive / Virginia / Special Weather Statements in 2012

Special Weather Statement, NWS Blacksburg, VA

July 23, 2012Halifax County, Virginia

NWS Blacksburg, VA issued this special weather statement at Jul 23, 2012, 1:46 PM EDT for Halifax County, Virginia. It was in force for 59 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 23, 2012, 1:46 PM EDT (17:46 UTC)
Expired: Jul 23, 2012, 2:45 PM EDT
In force: 59 min
Issued by: NWS Blacksburg, VA

County Halifax County, VA

The radar

The Roanoke radar (KFCX), 114 km from the middle of the area, began a volume at 17:49 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, 5.8 hours before the alert went out and 51 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: 1190 J/kg
Mixed-layer CIN: -30 J/kg
Mixed-layer LCL: 766 m above ground
0-6 km bulk shear: 17 kt
0-1 km storm-relative helicity: 30 m²/s²
0-3 km storm-relative helicity: -15 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 23, 12:24 PM EDT, 1 hour 22 minutes earlier.

Area forecast discussion, Jul 23, 12:24 PM EDT, 1 hour 22 minutes before

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Hazardous weather outlook, Jul 23, 5:27 AM EDT, 8 hours 19 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE BLACKSBURG VA
527 AM EDT MON JUL 23 2012

NCZ001>006-018>020-VAZ007-009>020-022>024-032>035-043>047-058-059-
WVZ042>045-241000-
ASHE-ALLEGHANY NC-SURRY-STOKES-ROCKINGHAM-CASWELL-WATAUGA-WILKES-
YADKIN-TAZEWELL-SMYTH-BLAND-GILES-WYTHE-PULASKI-MONTGOMERY-GRAYSON-
CARROLL-FLOYD-CRAIG-ALLEGHANY VA-BATH-ROANOKE-BOTETOURT-ROCKBRIDGE-
PATRICK-FRANKLIN-BEDFORD-AMHERST-HENRY-PITTSYLVANIA-CAMPBELL-
APPOMATTOX-BUCKINGHAM-HALIFAX-CHARLOTTE-MERCER-SUMMERS-MONROE-
GREENBRIER-
527 AM EDT MON JUL 23 2012

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

.DAY ONE...TODAY AND TONIGHT.

A THUNDERSTORM COMPLEX MAY DRIFT ACROSS THE REGION FROM THE
NORTHWEST LATE THIS AFTERNOON AND INTO THE EVENING. SOME OF THESE
THUNDERSTORMS MAY BE SEVERE...WITH DAMAGING WIND GUSTS BEING THE
MAIN CONCERN. SCATTERED THUNDERSTORMS ARE ALSO EXPECTED ACROSS THE
MOUNTAINS OF NORTHWEST NORTH CAROLINA DURING THE AFTERNOON AND
EARLY EVENING HOURS...IN ADDITION TO THE AFOREMENTIONED
THUNDERSTORM COMPLEX. FREQUENT LIGHTNING ALONG WITH LOCALIZED
HEAVY RAIN AND DAMAGING WIND GUSTS MAY ACCOMPANY THE STRONGER
STORMS.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY.

ANOTHER THUNDERSTORM COMPLEX IS EXPECTED TO DRIFT ACROSS THE
REGION FROM THE NORTHWEST TUESDAY AFTERNOON AND EVENING. THIS
COMPLEX WILL AFFECT AREAS MAINLY WEST OF INTERSTATE 77. ISOLATED
TO SCATTERED THUNDERSTORMS ARE EXPECTED ELSEWHERE...AGAIN MAINLY
DURING THE AFTERNOON AND EVENING HOURS. DAMAGING WINDS GUSTS MAY
ACCOMPANY THE THUNDERSTORM COMPLEX.

FOR THE REMAINDER OF THE WEEK...ISOLATED TO SCATTERED
THUNDERSTORMS ARE EXPECTED EACH DAY. AT THIS TIME...OUTSIDE OF
WEDNESDAY...IT APPEARS THAT FRIDAY OFFERS THE BEST CHANCE FOR MORE
WIDESPREAD CONVECTION AS A COLD FRONT DRIFTS THROUGH THE REGION.
THE PROBABILITY OF WIDESPREAD HAZARDOUS WEATHER DURING THE TIME
FRAME OF WEDNESDAY THROUGH SUNDAY IS LOW AT THIS TIME.

OTHERWISE...HEAT INDICES ACROSS THE VIRGINIA AND NORTH CAROLINA PIEDMONT
REGION ARE EXPECTED TO APPROACH 105 DEGREES THURSDAY AFTERNOON.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NEEDED THIS AFTERNOON AND
EVENING...MAINLY FOR AREAS WEST OF A LEXINGTON...TO ROANOKE...TO
MOUNT AIRY LINE. SPOTTER ACTIVATION MAY BE NEEDED AGAIN TUESDAY
AFTERNOON...MAINLY FOR AREAS WEST OF INTERSTATE 77.

RAB

In the hours before

Local storm report, Jul 23, 9:44 AM EDT, 4 hours 2 minutes before

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Local storm report, Jul 23, 11:10 AM EDT, 2 hours 36 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BLACKSBURG VA
1110 AM EDT MON JUL 23 2012

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

0630 PM     TSTM WND DMG     1 ESE PULASKI           37.04N 80.78W
07/16/2012                   PULASKI            VA   PUBLIC

            TWO TREES WERE SNAPPED BY THUNDERSTORM WINDS.

&&

HYSELL

Special weather statement, Jul 23, 12:11 PM EDT, 1 hour 35 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BLACKSBURG VA
1211 PM EDT MON JUL 23 2012

VAZ022-023-034-045-231715-
BEDFORD VA-BOTETOURT VA-CAMPBELL VA-ROANOKE VA-
1211 PM EDT MON JUL 23 2012

...A STRONG THUNDERSTORM WILL AFFECT BEDFORD...BOTETOURT...CAMPBELL
AND ROANOKE COUNTIES...

AT 1207 PM EDT...A STRONG THUNDERSTORM WAS LOCATED 5 MILES SOUTH OF
TROUTVILLE...MOVING EAST AT 25 MPH.

WIND GUSTS TO 40 MPH AND SMALL HAIL ARE POSSIBLE WITH THIS STORM.
VERY HEAVY RAIN WILL FALL FROM THIS STORM...AND WILL CAUSE WATER TO
POND ON ROADS AND QUICKLY FILL ROADSIDE DITCHES AND SMALL STREAMS.

THIS STORM WILL BE NEAR STEWARTSVILLE AROUND 1220 PM...MONTVALE
AROUND 1225 PM...CHAMBLISSBURG...AND GOODVIEW AROUND 1230 PM...
THAXTON AROUND 1235 PM...D-DAY MEMORIAL AROUND 1250 PM AND BEDFORD
CITY AROUND 1255 PM.

LISTEN TO NOAA WEATHER RADIO OR YOUR FAVORITE MEDIA OUTLET FOR LATER
UPDATES OR POSSIBLE WARNINGS.

LAT...LON 3710 7928 3711 7931 3713 7934 3712 7936
      3722 7978 3724 7979 3722 7980 3727 7998
      3744 7993 3737 7921

KK

Special weather statement, Jul 23, 12:38 PM EDT, 1 hour 8 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BLACKSBURG VA
1238 PM EDT MON JUL 23 2012

VAZ014-017-022-033-231745-
FLOYD VA-FRANKLIN VA-MONTGOMERY VA-ROANOKE VA-
1238 PM EDT MON JUL 23 2012

...A STRONG THUNDERSTORM WILL AFFECT FLOYD...FRANKLIN...MONTGOMERY
AND ROANOKE COUNTIES...

AT 1237 PM EDT...A STRONG THUNDERSTORM WAS LOCATED OVER
CHRISTIANSBURG...MOVING EAST AT 25 MPH.

WIND GUSTS TO 40 MPH AND SMALL HAIL ARE POSSIBLE WITH THIS STORM.
VERY HEAVY RAIN WILL FALL FROM THIS STORM...AND WILL CAUSE WATER TO
POND ON ROADS AND QUICKLY FILL ROADSIDE DITCHES AND SMALL STREAMS.

THIS STORM WILL BE NEAR SHAWSVILLE AROUND 1250 PM...CROCKETT
SPRINGS...ELLISTON...ELLISTON-LAFAYETTE...AND TERRYS FORK AROUND 1255
PM...CHECK AROUND 105 PM...BENT MOUNTAIN...AND COPPER HILL AROUND 110
PM...POAGES MILL AROUND 120 PM AND CALLAWAY AROUND 125 PM.

LISTEN TO NOAA WEATHER RADIO OR YOUR FAVORITE MEDIA OUTLET FOR LATER
UPDATES OR POSSIBLE WARNINGS.

LAT...LON 3709 8050 3727 8046 3719 7976 3719 7974
      3693 7981

KK

Special weather statement, Jul 23, 1:04 PM EDT, 42 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BLACKSBURG VA
104 PM EDT MON JUL 23 2012

NCZ003-004-VAZ016-032-231800-
CARROLL VA-PATRICK VA-STOKES NC-SURRY NC-
104 PM EDT MON JUL 23 2012

...A STRONG THUNDERSTORM WILL AFFECT CARROLL...PATRICK...STOKES AND
SURRY COUNTIES...

AT 102 PM EDT...A STRONG THUNDERSTORM WAS LOCATED OVER BOTTOM...
MOVING EAST AT 20 MPH.

WIND GUSTS TO 40 MPH AND SMALL HAIL ARE POSSIBLE WITH THIS STORM.
VERY HEAVY RAIN WILL FALL FROM THIS STORM...AND WILL CAUSE WATER TO
POND ON ROADS AND QUICKLY FILL ROADSIDE DITCHES AND SMALL STREAMS.

THIS STORM WILL BE NEAR BOTTOM AROUND 110 PM...PINE RIDGE AROUND 115
PM...CANA AROUND 120 PM...TOAST...MOUNT AIRY...AND WHITE PLAINS
AROUND 130 PM...FLAT ROCK...AND FLAT ROCK AROUND 135 PM...ARARAT AND
AND ARARAT AROUND 145 PM.

LISTEN TO NOAA WEATHER RADIO OR YOUR FAVORITE MEDIA OUTLET FOR LATER
UPDATES OR POSSIBLE WARNINGS.

LAT...LON 3644 8096 3647 8095 3651 8092 3653 8092
      3655 8091 3656 8090 3656 8084 3661 8088
      3659 8024 3632 8029

KK

Special weather statement, Jul 23, 1:46 PM EDT, 0 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BLACKSBURG VA
146 PM EDT MON JUL 23 2012

VAZ044-045-058-059-231845-
CAMPBELL VA-CHARLOTTE VA-HALIFAX VA-PITTSYLVANIA VA-
146 PM EDT MON JUL 23 2012

...HEAVY SNOW SHOWERS WILL AFFECT CAMPBELL...CHARLOTTE...HALIFAX AND
PITTSYLVANIA COUNTIES...

AT 145 PM EDT...HEAVY SNOW SHOWERS WERE LOCATED 4 MILES SOUTH OF
HURT...MOVING EAST AT 20 MPH.

WIND GUSTS TO 40 MPH AND SMALL HAIL ARE POSSIBLE WITH THIS HEAVY SNOW
SHOWERS.

THIS HEAVY SNOW SHOWERS WILL BE NEAR MT AIRY AROUND 200 PM...
STRAIGHTSTONE AROUND 205 PM...CODY AROUND 215 PM...LEDA AROUND 220
PM...BROOKNEAL AROUND 230 PM AND NATHALIE AROUND 240 PM.

LAT...LON 3702 7871 3676 7881 3696 7940 3713 7933

KK

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 23, 12:11 PM EDT	Special Weather Statement	RNK	Bedford, City of Roanoke	64 min
Jul 23, 12:38 PM EDT	Special Weather Statement	RNK	Franklin, Montgomery	67 min
Jul 23, 1:56 PM EDT	Special Weather Statement	RNK	Halifax	49 min
Jul 23, 2:23 PM EDT	Severe Thunderstorm Warning	RNK	Halifax	28 min
Jul 23, 2:29 PM EDT	Severe Thunderstorm Warning	RNK	Franklin, Henry, Pittsylvania	61 min
Jul 23, 3:06 PM EDT	Severe Thunderstorm Warning	RNK	Henry, City of Martinsville	54 min
Jul 23, 3:08 PM EDT	Severe Thunderstorm Warning	RNK	Bedford, Pittsylvania	22 min
Jul 23, 3:33 PM EDT	Special Weather Statement	RNK	Pittsylvania	42 min
Jul 23, 3:40 PM EDT	Special Weather Statement	RNK	Pittsylvania	35 min
Jul 23, 3:49 PM EDT	Special Weather Statement	RNK	City of Martinsville	56 min
Jul 23, 3:56 PM EDT	Special Weather Statement	RNK	Botetourt	34 min
Jul 23, 4:06 PM EDT	Severe Thunderstorm Warning	RNK	Halifax, Pittsylvania	35 min
Jul 23, 4:32 PM EDT	Special Weather Statement	RNK	Bland	58 min
Jul 23, 4:39 PM EDT	Severe Thunderstorm Warning	RNK	Amherst, Appomattox, Campbell, City of Lynchburg	40 min
Jul 23, 4:48 PM EDT	Special Weather Statement	RNK	Buckingham	57 min
Jul 23, 5:21 PM EDT	Special Weather Statement	RNK	Pulaski	39 min
Jul 23, 1:04 PM EDT	Special Weather Statement	RNK	Surry	56 min
Jul 23, 2:08 PM EDT	Severe Thunderstorm Warning	RNK	Surry, Wilkes, Yadkin	67 min
Jul 23, 3:15 PM EDT	Special Weather Statement	RNK	Yadkin	45 min
Jul 23, 4:49 PM EDT	Special Weather Statement	RNK	Caswell	56 min

Nearby

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.