Alert archive / Virginia / Special Weather Statements in 2009

Special Weather Statement, NWS Blacksburg, VA

July 17, 2009Pulaski County, City of Radford, Virginia

NWS Blacksburg, VA issued this special weather statement at Jul 17, 2009, 4:01 PM EDT for Pulaski County, City of Radford, Virginia. It was in force for 29 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 17, 2009, 4:01 PM EDT (20:01 UTC)
Expired: Jul 17, 2009, 4:30 PM EDT
In force: 29 min
Issued by: NWS Blacksburg, VA

Counties City of Radford, VA, Pulaski County, VA

The radar

The Roanoke radar (KFCX), 42 km from the middle of the area, began a volume at 20:01 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, 8.0 hours before the alert went out and 111 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: 1643 J/kg
Mixed-layer CIN: -13 J/kg
Mixed-layer LCL: 578 m above ground
0-6 km bulk shear: 40 kt
0-1 km storm-relative helicity: 74 m²/s²
0-3 km storm-relative helicity: 76 m²/s²
Significant tornado parameter: 0.7
Supercell composite: 4.6

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 17, 4:00 PM EDT, 1 minute earlier.

Area forecast discussion, Jul 17, 4:00 PM EDT, 1 minute before

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Hazardous weather outlook, Jul 17, 1:55 PM EDT, 2 hours 6 minutes before

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In the hours before

Local storm report, Jul 17, 12:15 PM EDT, 3 hours 46 minutes before

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Local storm report, Jul 17, 1:15 PM EDT, 2 hours 46 minutes before

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Local storm report, Jul 17, 2:05 PM EDT, 1 hour 56 minutes before

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Local storm report, Jul 17, 2:39 PM EDT, 1 hour 22 minutes before

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Special weather statement, Jul 17, 2:39 PM EDT, 1 hour 22 minutes before

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Special weather statement, Jul 17, 4:01 PM EDT, 0 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 17, 7:31 AM EDT	Special Weather Statement	RNK	Wythe	59 min
Jul 17, 7:33 AM EDT	Severe Thunderstorm Warning	RNK	Carroll, Grayson, Pulaski, Wythe, City of Galax	57 min
Jul 17, 8:28 AM EDT	Severe Thunderstorm Warning	RNK	Carroll, Floyd, Montgomery, Pulaski, City of Radford	62 min
Jul 17, 9:42 AM EDT	Severe Thunderstorm Warning	RNK	Bedford, Botetourt, Floyd, Franklin, Montgomery, Roanoke and 2 more	63 min
Jul 17, 10:03 AM EDT	Severe Thunderstorm Warning	RNK	Bedford, Franklin, Pittsylvania	57 min
Jul 17, 10:34 AM EDT	Severe Thunderstorm Warning	RNK	Bedford, Campbell, Charlotte, Franklin, Halifax, Pittsylvania	56 min
Jul 17, 11:21 AM EDT	Tornado Warning	RNK	Appomattox, Campbell, Charlotte, Halifax, Pittsylvania	39 min
Jul 17, 11:30 AM EDT	Areal Flood Advisory	RNK	Appomattox, Campbell, Charlotte, Halifax, Pittsylvania	3 hr
Jul 17, 11:49 AM EDT	Severe Thunderstorm Warning	RNK	Halifax, Pittsylvania	56 min
Jul 17, 11:58 AM EDT	Severe Thunderstorm Warning	RNK	Appomattox, Campbell, Charlotte, Halifax	62 min
Jul 17, 12:27 PM EDT	Severe Thunderstorm Warning	RNK	Charlotte, Halifax	39 min
Jul 17, 2:39 PM EDT	Special Weather Statement	RNK	Bland, Tazewell	66 min
Jul 17, 4:15 PM EDT	Special Weather Statement	RNK	City of Roanoke	30 min
Jul 17, 4:33 PM EDT	Special Weather Statement	RNK	Floyd, Franklin	57 min
Jul 17, 4:44 PM EDT	Severe Thunderstorm Warning	RNK	Bedford, Campbell, Franklin, Pittsylvania	61 min
Jul 17, 5:45 PM EDT	Severe Thunderstorm Warning	RNK	Bedford, Campbell, Charlotte, Halifax, Pittsylvania	90 min
Jul 17, 6:09 AM EDT	Special Weather Statement	RNK	Mercer	36 min

Nearby

Special Weather Statements in Virginia, 2009 Every special weather statement in 2009

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.