Alert archive / Virginia / Special Weather Statements in 2013

Special Weather Statement, NWS Blacksburg, VA

July 24, 2013Buckingham County, Virginia

NWS Blacksburg, VA issued this special weather statement at Jul 24, 2013, 4:03 PM EDT for Buckingham County, Virginia. It was in force for 57 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 24, 2013, 4:03 PM EDT (20:03 UTC)
Expired: Jul 24, 2013, 5:00 PM EDT
In force: 57 min
Issued by: NWS Blacksburg, VA

County Buckingham County, VA

The radar

The Roanoke radar (KFCX), 147 km from the middle of the area, began a volume at 20:04 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, 8.1 hours before the alert went out and 195 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: 89 J/kg
Mixed-layer CIN: -82 J/kg
Mixed-layer LCL: 1355 m above ground
0-6 km bulk shear: 23 kt
0-1 km storm-relative helicity: -12 m²/s²
0-3 km storm-relative helicity: 2 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 24, 2:02 PM EDT, 2 hours 1 minute earlier.

Area forecast discussion, Jul 24, 2:02 PM EDT, 2 hours 1 minute before

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Hazardous weather outlook, Jul 24, 3:54 AM EDT, 12 hours 9 minutes before

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In the hours before

Special weather statement, Jul 24, 2:11 PM EDT, 1 hour 52 minutes before

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Special weather statement, Jul 24, 3:46 PM EDT, 17 minutes before

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Special weather statement, Jul 24, 4:03 PM EDT, 0 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BLACKSBURG VA
403 PM EDT WED JUL 24 2013

VAZ047-242100-
BUCKINGHAM VA-
403 PM EDT WED JUL 24 2013

THE NATIONAL WEATHER SERVICE IN BLACKSBURG HAS ISSUED A

* SPECIAL WEATHER STATEMENT FOR...
  NORTHWESTERN BUCKINGHAM COUNTY IN CENTRAL VIRGINIA...

* UNTIL 500 PM EDT

* AT 400 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING
  A STRONG THUNDERSTORM NEAR WINGINA...MOVING TO THE SOUTHEAST AT 15
  MPH.

* WIND GUSTS UP TO 45 MPH ARE EXPECTED WITH THIS STORM. VERY HEAVY
  RAIN IS FALLING...AND WILL CAUSE WATER TO POND ON ROADWAYS AND
  QUICKLY FILL ROADSIDE DITCHES AND SMALL STREAMS. EXPECT FREQUENT
  CLOUD TO GROUND LIGHTNING WITH THIS STORM.

* LOCATIONS IMPACTED INCLUDE...
  AND WINGINA.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

PROLONGED HEAVY RAINFALL MAY CAUSE WATER TO FLOW OVER THE ROADWAY. DO
NOT DRIVE YOUR VEHICLE WHERE THE ROAD HAS BECOME FLOODED.

THIS STORM WILL LIKELY INTENSIFY...SO MONITOR LOCAL RADIO AND
TELEVISION FOR ADDITIONAL INFORMATION...AND POSSIBLE WARNINGS...FROM
THE NATIONAL WEATHER SERVICE.

&&

LAT...LON 3746 7871 3755 7883 3757 7881 3758 7883
      3759 7883 3760 7881 3763 7882 3764 7880
      3763 7872 3766 7872 3761 7859
TIME...MOT...LOC 2000Z 315DEG 12KT 3761 7878

16

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 24, 4:50 AM EDT	Special Weather Statement	RNK	Bland, Giles	40 min
Jul 24, 5:11 AM EDT	Special Weather Statement	RNK	Tazewell	49 min
Jul 24, 5:59 AM EDT	Special Weather Statement	RNK	Tazewell	46 min
Jul 24, 2:11 PM EDT	Special Weather Statement	RNK	Appomattox	64 min
Jul 24, 3:46 PM EDT	Special Weather Statement	RNK	Charlotte	14 min
Jul 24, 4:48 PM EDT	Special Weather Statement	RNK	Appomattox	42 min
Jul 24, 7:31 PM EDT	Special Weather Statement	RNK	Buckingham	44 min
Jul 24, 5:17 PM EDT	Special Weather Statement	RNK	Wilkes	43 min
Jul 24, 6:53 PM EDT	Special Weather Statement	RNK	Wilkes	52 min
Jul 24, 3:40 AM EDT	Special Weather Statement	RNK	Greenbrier	50 min

Nearby

Special Weather Statements in Virginia, 2013 Every special weather statement in 2013

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.