Alert archive / Virginia / Special Weather Statements in 2012

Special Weather Statement, NWS Blacksburg, VA

July 28, 2012Smyth County, Wythe County, Virginia

NWS Blacksburg, VA issued this special weather statement at Jul 28, 2012, 3:33 PM EDT for Smyth County, Wythe County, Virginia. It was in force for 42 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 28, 2012, 3:33 PM EDT (19:33 UTC)
Expired: Jul 28, 2012, 4:15 PM EDT
In force: 42 min
Issued by: NWS Blacksburg, VA

Counties Smyth County, VA, Wythe County, VA

The radar

The Roanoke radar (KFCX), 90 km from the middle of the area, began a volume at 19:36 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 12:00Z, 7.6 hours before the alert went out and 154 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: 733 J/kg
Mixed-layer CIN: -49 J/kg
Mixed-layer LCL: 936 m above ground
0-6 km bulk shear: 36 kt
0-1 km storm-relative helicity: 43 m²/s²
0-3 km storm-relative helicity: 48 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 1.4

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 28, 11:10 AM EDT, 4 hours 23 minutes earlier.

Area forecast discussion, Jul 28, 11:10 AM EDT, 4 hours 23 minutes before

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Hazardous weather outlook, Jul 28, 4:12 AM EDT, 11 hours 21 minutes before

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In the hours before

Local storm report, Jul 28, 9:56 AM EDT, 5 hours 37 minutes before

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Special weather statement, Jul 28, 3:33 PM EDT, 0 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BLACKSBURG VA
333 PM EDT SAT JUL 28 2012

VAZ009-012-282015-
SMYTH VA-WYTHE VA-
333 PM EDT SAT JUL 28 2012

...A STRONG THUNDERSTORM WILL AFFECT SMYTH AND WYTHE COUNTIES...

AT 325 PM EDT...RADAR INDICATED A STRONG THUNDERSTORM 5 MILES
NORTHEAST OF MARION...MOVING EAST AT 25 MPH.

WIND GUSTS TO 30 MPH ARE POSSIBLE WITH THIS STORM. EXPECT OCCASIONAL
CLOUD TO GROUND LIGHTNING FROM THIS STORM. FOR YOUR SAFETY...DO NOT
STAY IN THE OPEN...PLEASE SEEK SHELTER INDOORS UNTIL THE STORM
PASSES.

THIS STORM WILL BE NEAR MARION AND RURAL RETREAT THROUGH 345
PM...THEN TO NEAR OR JUST SOUTH OF WYTHEVILLE BETWEEN 400 PM AND 415
PM...PASSING WITHIN THE VICINITY OF CRIPPLE CREEK BETWEEN 415 PM AND
430 PM.

LAT...LON 3700 8154 3700 8147 3699 8148 3700 8142
      3695 8138 3700 8132 3700 8088 3684 8090
      3682 8103 3679 8108 3677 8109 3676 8114
      3682 8156

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 28, 4:18 PM EDT	Special Weather Statement	RNK	Grayson	57 min
Jul 28, 5:59 PM EDT	Special Weather Statement	RNK	Pittsylvania	61 min
Jul 28, 6:27 PM EDT	Severe Thunderstorm Warning	RNK	Franklin, Henry, Pittsylvania, City of Martinsville	48 min
Jul 28, 4:58 PM EDT	Special Weather Statement	RNK	Stokes	32 min
Jul 28, 6:59 PM EDT	Special Weather Statement	RNK	Caswell	61 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.