Alert archive / Virginia / Special Weather Statements in 2012

Special Weather Statement, NWS Blacksburg, VA

June 25, 2012Appomattox County, Virginia

NWS Blacksburg, VA issued this special weather statement at Jun 25, 2012, 3:08 PM EDT for Appomattox County, Virginia. It was in force for 22 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
Jun 25, 2012, 3:08 PM EDT (19:08 UTC)
Expired
Jun 25, 2012, 3:30 PM EDT
In force
22 min
Issued by
NWS Blacksburg, VA

County Appomattox County, VA

The radar

The Norfolk radar (KAKQ), 145 km from the middle of the area, began a volume at 19:10 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, 7.1 hours before the alert went out and 84 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 2012-06-25Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 30 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 2012-06-25The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 42 square meters per square second.19395878Sfc1 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
30 J/kg
Mixed-layer CIN
-124 J/kg
Mixed-layer LCL
1165 m above ground
0-6 km bulk shear
27 kt
0-1 km storm-relative helicity
42 m²/s²
0-3 km storm-relative helicity
12 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.

928 
WWUS81 KRNK 251909
SPSRNK

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BLACKSBURG VA
308 PM EDT MON JUN 25 2012

VAZ046-047-251930-
BUCKINGHAM VA-APPOMATTOX VA-
308 PM EDT MON JUN 25 2012

...THE NATIONAL WEATHER SERVICE IN BLACKSBURG HAS ISSUED A SPECIAL
WEATHER STATEMENT FOR SOUTHWESTERN BUCKINGHAM AND EAST CENTRAL 
APPOMATTOX
COUNTIES UNTIL 330 PM EDT...

AT 307 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS
TRACKING A STRONG THUNDERSTORM NEAR HIXBURG...OR 7 MILES EAST OF
APPOMATTOX...MOVING SOUTHEAST AT 20 MPH.

DIME SIZE HAIL AND WIND GUSTS UP TO 30 MPH ARE EXPECTED WITH THIS
STORM.

LAT...LON 3734 7847 3733 7851 3735 7854 3735 7855
      3737 7856 3736 7858 3740 7859 3735 7859
      3729 7865 3737 7876 3744 7870 3737 7844
TIME...MOT...LOC 1907Z 300DEG 17KT 3738 7870 

$$

RAB

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 24, 8:38 PM EDTSpecial Weather StatementRNKCampbell52 min
Jun 24, 10:17 PM EDTSpecial Weather StatementRNKRoanoke, City of Roanoke, City of Salem43 min
Jun 25, 1:32 PM EDTSpecial Weather StatementRNKAmherst, City of Buena Vista28 min
Jun 25, 2:16 PM EDTSpecial Weather StatementRNKAmherst, Appomattox44 min
Jun 25, 2:29 PM EDTSevere Thunderstorm WarningRNKBuckingham35 min
Jun 24, 9:16 PM EDTSpecial Weather StatementRNKRockingham44 min
Jun 24, 9:26 PM EDTSevere Thunderstorm WarningRNKRockingham49 min

Nearby

Special Weather Statements in Virginia, 2012Every 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.