Alert archive / Virginia / Special Weather Statements in 2016

Special Weather Statement, NWS Blacksburg, VA

July 12, 2016Campbell County, Virginia

NWS Blacksburg, VA issued this special weather statement at Jul 12, 2016, 5:11 PM EDT for Campbell County, Virginia. It was in force for 49 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 12, 2016, 5:11 PM EDT (21:11 UTC)
Expired
Jul 12, 2016, 6:00 PM EDT
In force
49 min
Issued by
NWS Blacksburg, VA

County Campbell County, VA

The radar

The Roanoke radar (KFCX), 84 km from the middle of the area, began a volume at 21:14 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, 9.2 hours before the alert went out and 19 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-pSkew-T log-p diagram, Roanoke, VA at 12:00Z on 2016-07-12Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 129 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Roanoke, VA at 12:00Z on 2016-07-12The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 43 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
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
129 J/kg
Mixed-layer CIN
-51 J/kg
Mixed-layer LCL
905 m above ground
0-6 km bulk shear
8 kt
0-1 km storm-relative helicity
43 m²/s²
0-3 km storm-relative helicity
90 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

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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 12, 4:48 PM EDT, 23 minutes earlier.

Area forecast discussion, Jul 12, 4:48 PM EDT, 23 minutes before
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Hazardous weather outlook, Jul 12, 5:19 AM EDT, 11 hours 52 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE BLACKSBURG VA
519 AM EDT TUE JUL 12 2016

NCZ001>006-018>020-VAZ007-009>020-022>024-032>035-043>047-058-059-
WVZ042>044-507-508-131100-
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-
EASTERN GREENBRIER-WESTERN GREENBRIER-
519 AM EDT TUE JUL 12 2016

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.

SCATTERED TO NUMEROUS THUNDERSTORMS ARE EXPECTED THIS AFTERNOON
AND EVENING. LOCALLY HEAVY RAINFALL...WHICH COULD LEAD TO
LOCALIZED FLOODING...WILL BE POSSIBLE WITH THE HEAVIER...SLOWER
MOVING STORMS.

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

SCATTERED THUNDERSTORMS ARE EXPECTED EACH DAY...MOST NUMEROUS
DURING THE AFTERNOONS AND EVENINGS. THUNDERSTORMS ARE EXPECTED TO
BE MOST NUMEROUS FRIDAY. LOCALLY HEAVY RAINFALL AND LOCALIZED
FLOODING WILL BE POSSIBLE WITH THE HEAVIER THUNDERSTORMS.

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

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.

RAB

In the hours before

Special weather statement, Jul 12, 2:07 PM EDT, 3 hours 4 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BLACKSBURG VA
207 PM EDT TUE JUL 12 2016

VAZ018-022-121830-
CRAIG-ROANOKE-
207 PM EDT TUE JUL 12 2016

...A STRONG THUNDERSTORM WILL AFFECT
CRAIG AND NORTHWESTERN ROANOKE COUNTIES...

AT 205 PM EDT...A STRONG THUNDERSTORM WAS OVER SIMMONSVILLE...MOVING
EAST AT 20 MPH.

WINDS IN EXCESS OF 30 MPH ARE POSSIBLE WITH THIS STORM.

LOCATIONS IMPACTED INCLUDE...
NEW CASTLE...
PAINT BANK...
CATAWBA...
SINKING CREEK...
AND CRAIG SPRINGS.

A VERY HEAVY DOWNPOUR OF RAIN IS ALSO OCCURRING WITH THIS
STORM...AND MAY CAUSE PONDING OF WATER ON ROADS AND FLOODING OF POOR
DRAINAGE AREAS. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED ROADWAYS.

LAT...LON 3763 8003 3755 7997 3742 8007 3739 8001
      3734 7998 3731 8026 3734 8027 3737 8033
      3732 8043 3742 8048 3749 8036 3751 8030
      3753 8028 3753 8032 3756 8033 3760 8026
      3763 8022 3762 8017 3760 8015 3766 8003
TIME...MOT...LOC 1805Z 247DEG 17KT 3738 8033

11
Special weather statement, Jul 12, 2:39 PM EDT, 2 hours 32 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BLACKSBURG VA
239 PM EDT TUE JUL 12 2016

VAZ022-121900-
ROANOKE-
239 PM EDT TUE JUL 12 2016

...A STRONG THUNDERSTORM WILL AFFECT ROANOKE COUNTY...THE CITY OF
SALEM...AND THE CITY OF ROANOKE...

AT 235 PM EDT...A STRONG THUNDERSTORM WAS OVER GLENVAR...MOVING EAST
AT 20 MPH.

WINDS IN EXCESS OF 30 MPH ARE POSSIBLE WITH THIS STORM.

LOCATIONS IMPACTED INCLUDE...
ROANOKE...
SALEM...
VINTON...
BENT MOUNTAIN...
AND CATAWBA.

THIS INCLUDES THE SALEM FAIRGROUNDS AND ROANOKE REGIONAL AIRPORT.

A VERY HEAVY DOWNPOUR OF RAIN IS OCCURRING WITH THIS STORM...AND MAY
CAUSE PONDING OF WATER ON ROADS AND FLOODING OF POOR DRAINAGE
AREAS. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED ROADWAYS.

IN ADDITION...OCCASIONAL CLOUD TO GROUND LIGHTNING IS OCCURRING WITH
THIS STORM. KEEP IN MIND...LIGHTNING CAN STRIKE 15 MILES AWAY FROM A
THUNDERSTORM...SO SEEK A SAFE SHELTER INSIDE A BUILDING OR VEHICLE
UNTIL THE STORM HAS PASSED.

LAT...LON 3741 8006 3732 7986 3730 7984 3727 7986
      3723 7984 3721 7988 3716 7991 3714 7996
      3715 8000 3717 8001 3717 8003 3716 8009
      3712 8012 3711 8017 3723 8019 3730 8026
      3734 8026 3738 8020 3738 8015 3742 8007
TIME...MOT...LOC 1836Z 256DEG 15KT 3726 8018

PM
Special weather statement, Jul 12, 3:08 PM EDT, 2 hours 3 minutes before
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Special weather statement, Jul 12, 3:14 PM EDT, 1 hour 57 minutes before
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Special weather statement, Jul 12, 4:28 PM EDT, 43 minutes before
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Special weather statement, Jul 12, 5:11 PM EDT, 0 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Jul 11, 9:24 PM EDTSpecial Weather StatementRNKPatrick51 min
Jul 11, 10:19 PM EDTSpecial Weather StatementRNKHenry, Patrick, City of Martinsville56 min
Jul 12, 2:07 PM EDTSpecial Weather StatementRNKCraig, Roanoke23 min
Jul 12, 2:39 PM EDTSpecial Weather StatementRNKRoanoke, City of Roanoke, City of Salem21 min
Jul 12, 3:08 PM EDTSpecial Weather StatementRNKAlleghany, City of Covington37 min
Jul 12, 3:14 PM EDTSpecial Weather StatementRNKCity of Roanoke, City of Salem46 min
Jul 12, 3:22 PM EDTAreal Flood AdvisoryRNKRoanoke, City of Roanoke, City of Salem3 hr
Jul 12, 4:28 PM EDTSpecial Weather StatementRNKBedford, City of Lynchburg62 min
Jul 12, 5:16 PM EDTAreal Flood AdvisoryRNKCarroll6 hr
Jul 12, 5:28 PM EDTSpecial Weather StatementRNKCity of Lynchburg47 min
Jul 12, 6:15 PM EDTSpecial Weather StatementRNKCampbell45 min
Jul 12, 6:26 PM EDTSpecial Weather StatementRNKBland, Giles, Grayson, Pulaski, Wythe, City of Galax64 min
Jul 12, 6:36 PM EDTSpecial Weather StatementRNKHalifax39 min
Jul 12, 6:57 PM EDTSevere Thunderstorm WarningRNKPittsylvania, City of Danville21 min
Jul 12, 7:23 PM EDTSpecial Weather StatementRNKBuckingham37 min
Jul 12, 7:33 PM EDTSpecial Weather StatementRNKHalifax57 min
Jul 12, 7:40 PM EDTSpecial Weather StatementRNKAlleghany, Craig, City of Covington65 min
Jul 11, 8:34 PM EDTSpecial Weather StatementRNKCaswell41 min
Jul 11, 9:17 PM EDTSpecial Weather StatementRNKRockingham43 min

Nearby

Special Weather Statements in Virginia, 2016Every special weather statement in 2016

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.