Alert archive / Virginia / Special Weather Statements in 2012

Special Weather Statement, NWS Blacksburg, VA

July 31, 2012Bath County, Virginia

NWS Blacksburg, VA issued this special weather statement at Jul 31, 2012, 3:44 PM EDT for Bath County, Virginia. It was in force for 61 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, 3:44 PM EDT (19:44 UTC)
Expired
Jul 31, 2012, 4:45 PM EDT
In force
61 min
Issued by
NWS Blacksburg, VA

County Bath County, VA

The radar

The Roanoke radar (KFCX), 135 km from the middle of the area, began a volume at 19:47 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, 7.7 hours before the alert went out and 108 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 2012-07-31Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 384 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 2012-07-31The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 7 square meters per square second.193958Sfc1 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
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, 9 minutes earlier.

Area forecast discussion, Jul 31, 3:35 PM EDT, 9 minutes before
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Hazardous weather outlook, Jul 31, 9:52 AM EDT, 5 hours 52 minutes before
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In the hours before

Special weather statement, Jul 31, 1:08 PM EDT, 2 hours 36 minutes before
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Special weather statement, Jul 31, 3:02 PM EDT, 42 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BLACKSBURG VA
302 PM EDT TUE JUL 31 2012

VAZ011-014-018-022-312000-
CRAIG VA-GILES VA-MONTGOMERY VA-ROANOKE VA-
302 PM EDT TUE JUL 31 2012

...A STRONG THUNDERSTORM WILL AFFECT CRAIG...GILES...MONTGOMERY AND
ROANOKE COUNTIES...

AT 259 PM EDT...A STRONG THUNDERSTORM WAS LOCATED OVER NEWPORT...
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.
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 BLACKSBURG AROUND 310 PM...HUFFMAN AROUND 320
PM...SIMMONSVILLE AROUND 330 PM...MC DONALDS MILL AROUND 340 PM...
ELLISTON-LAFAYETTE AROUND 345 PM AND BRADSHAW AROUND 350 PM.

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

LAT...LON 3722 8012 3715 8055 3718 8057 3719 8055
      3719 8052 3721 8053 3719 8058 3732 8063
      3748 8021

KK
Special weather statement, Jul 31, 3:12 PM EDT, 32 minutes before
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Special weather statement, Jul 31, 3:44 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 30, 8:16 PM EDTSevere Thunderstorm WarningRNKHalifax, Pittsylvania59 min
Jul 30, 9:24 PM EDTSpecial Weather StatementRNKPittsylvania66 min
Jul 31, 1:08 PM EDTSpecial Weather StatementRNKGrayson, Smyth67 min
Jul 31, 3:02 PM EDTSpecial Weather StatementRNKRoanoke58 min
Jul 31, 3:12 PM EDTSpecial Weather StatementRNKTazewell63 min
Jul 31, 3:36 PM EDTFlash Flood WarningRNKTazewell6 hr
Jul 31, 4:01 PM EDTSpecial Weather StatementRNKMontgomery, City of Radford59 min
Jul 31, 7:06 PM EDTSpecial Weather StatementRNKBath54 min
Jul 31, 4:06 PM EDTSpecial Weather StatementRNKMercer54 min
Jul 31, 5:09 PM EDTSpecial Weather StatementRNKGreenbrier66 min
Jul 31, 5:48 PM EDTSpecial Weather StatementRNKGreenbrier57 min
Jul 31, 7:12 PM EDTSpecial Weather StatementRNKGreenbrier63 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.