Alert archive / West Virginia / Special Weather Statements in 2012

Special Weather Statement, NWS Blacksburg, VA

July 31, 2012Greenbrier County, West Virginia

NWS Blacksburg, VA issued this special weather statement at Jul 31, 2012, 7:12 PM EDT for Greenbrier County, West Virginia. It was in force for 63 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 31, 2012, 7:12 PM EDT (23:12 UTC)
Expired: Jul 31, 2012, 8:15 PM EDT
In force: 63 min
Issued by: NWS Blacksburg, VA

County Greenbrier County, WV

The radar

The Charleston,WV radar (KRLX), 117 km from the middle of the area, began a volume at 23:16 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, 11.2 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: 384 J/kg
Mixed-layer CIN: -68 J/kg
Mixed-layer LCL: 804 m above ground
0-6 km bulk shear: 24 kt
0-1 km storm-relative helicity: 7 m²/s²
0-3 km storm-relative helicity: 36 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 31, 3:35 PM EDT, 3 hours 37 minutes earlier.

Area forecast discussion, Jul 31, 3:35 PM EDT, 3 hours 37 minutes before

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Hazardous weather outlook, Jul 31, 3:45 PM EDT, 3 hours 27 minutes before

HAZARDOUS WEATHER OUTLOOK...UPDATED
NATIONAL WEATHER SERVICE BLACKSBURG VA
345 PM EDT TUE JUL 31 2012

NCZ001>006-018>020-VAZ007-009>020-022>024-032>035-043>047-058-059-
WVZ042>045-011945-
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-
345 PM EDT TUE JUL 31 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...THIS AFTERNOON AND TONIGHT.

SCATTERED STRONG TO SEVERE THUNDERSTORMS ARE POSSIBLE THROUGH EARLY
THIS EVENING. THE MAIN THREATS ARE DAMAGING WINDS AND LARGE HAIL.
PERIODS OF VERY HEAVY RAINFALL CAPABLE OF PRODUCING LOCALIZED
FLASH FLOODING ARE ALSO LIKELY.

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

SCATTERED STRONG TO SEVERE THUNDERSTORMS ARE POSSIBLE AGAIN
WEDNESDAY AFTERNOON.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.

In the hours before

Local storm report, Jul 31, 4:37 PM EDT, 2 hours 35 minutes before

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Local storm report, Jul 31, 4:45 PM EDT, 2 hours 27 minutes before

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Special weather statement, Jul 31, 5:09 PM EDT, 2 hours 3 minutes before

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Special weather statement, Jul 31, 5:48 PM EDT, 1 hour 24 minutes before

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Special weather statement, Jul 31, 7:06 PM EDT, 6 minutes before

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Special weather statement, Jul 31, 7:12 PM EDT, 0 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BLACKSBURG VA
712 PM EDT TUE JUL 31 2012

WVZ045-010015-
GREENBRIER WV-
712 PM EDT TUE JUL 31 2012

...A STRONG THUNDERSTORM WILL AFFECT GREENBRIER COUNTY...

AT 707 PM EDT...STRONG THUNDERSTORMS WITH VERY HEAVY RAIN WERE
LOCATED ACROSS NORTHWEST GREENBRIER COUNTY ALONG THE
NICHOLAS...GREENBRIER COUNTY LINE FROM NORTHWEST OF DUO TO NORTH OF
LEONARD ALONG THE POCAHONTAS COUNTY LINE...MOVING EAST AT 20 MPH.

OVER 2.0 INCHES OF RAIN HAS FALLEN ACROSS NORTHWEST GREENBRIER
COUNTY DURING THE PAST COUPLE OF HOURS...AND AN ADDITIONAL INCH OF
RAIN IN THIS AREA IS LIKELY DURING THE NEXT HOUR. THIS VERY HEAVY
RAIN WILL CAUSE WATER TO POND ON ROADS AND QUICKLY FILL ROADSIDE
DITCHES AND SMALL STREAMS. IN ADDITION...EXPECT FREQUENT CLOUD TO
GROUND LIGHTNING FROM THIS STORM. 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 LEONARD AROUND 735 PM AND BEARTOWN STATE PARK
AROUND 750 PM.

LAT...LON 3811 8035 3805 8026 3804 8021 3802 8021
      3805 8072 3808 8071 3824 8049 3823 8036

RAB

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 30, 8:16 PM EDT	Severe Thunderstorm Warning	RNK	Halifax, Pittsylvania	59 min
Jul 30, 9:24 PM EDT	Special Weather Statement	RNK	Pittsylvania	66 min
Jul 31, 1:08 PM EDT	Special Weather Statement	RNK	Grayson, Smyth	67 min
Jul 31, 3:02 PM EDT	Special Weather Statement	RNK	Roanoke	58 min
Jul 31, 3:12 PM EDT	Special Weather Statement	RNK	Tazewell	63 min
Jul 31, 3:36 PM EDT	Flash Flood Warning	RNK	Tazewell	6 hr
Jul 31, 3:44 PM EDT	Special Weather Statement	RNK	Bath	61 min
Jul 31, 4:01 PM EDT	Special Weather Statement	RNK	Montgomery, City of Radford	59 min
Jul 31, 7:06 PM EDT	Special Weather Statement	RNK	Bath	54 min
Jul 31, 4:06 PM EDT	Special Weather Statement	RNK	Mercer	54 min
Jul 31, 5:09 PM EDT	Special Weather Statement	RNK	Greenbrier	66 min
Jul 31, 5:48 PM EDT	Special Weather Statement	RNK	Greenbrier	57 min

Nearby

Special Weather Statements in West 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.