Alert archive / Virginia / Areal Flood Warnings in 2012

Areal Flood Warning 6, NWS Blacksburg, VA

May 14, 20125 counties in Virginia

NWS Blacksburg, VA issued this areal flood warning at May 14, 2012, 8:55 PM EDT for 5 counties in Virginia. It was in force for 6 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: May 14, 2012, 8:55 PM EDT (00:55 UTC)
Expired: May 15, 2012, 3:00 AM EDT
In force: 6 hr
Issued by: NWS Blacksburg, VA
Area: Storm-based polygon
Flood severity: None

Counties Amherst County, VA, Bedford County, VA, City of Buena Vista, VA, City of Lexington, VA, Rockbridge County, VA

The radar

The Roanoke radar (KFCX), 105 km from the middle of the area, began a volume at 00:56 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 00:00Z, 0.9 hours before the alert went out and 51 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: 763 J/kg
Mixed-layer CIN: 0 J/kg
Mixed-layer LCL: 537 m above ground
0-6 km bulk shear: 32 kt
0-1 km storm-relative helicity: 41 m²/s²
0-3 km storm-relative helicity: 91 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 1.8

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this areal flood warning 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 areal flood warning went out at May 14, 7:26 PM EDT, 1 hour 29 minutes earlier.

Area forecast discussion, May 14, 7:26 PM EDT, 1 hour 29 minutes before

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Hazardous weather outlook, May 14, 6:22 PM EDT, 2 hours 33 minutes before

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In the hours before

Special weather statement, May 14, 7:24 PM EDT, 1 hour 31 minutes before

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Special weather statement, May 14, 7:30 PM EDT, 1 hour 25 minutes before

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Special weather statement, May 14, 7:47 PM EDT, 1 hour 8 minutes before

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Special weather statement, May 14, 7:56 PM EDT, 59 minutes before

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Special weather statement, May 14, 8:02 PM EDT, 53 minutes before

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Special weather statement, May 14, 8:16 PM EDT, 39 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
May 14, 8:02 PM EDT	Special Weather Statement	RNK	Bedford	28 min
May 14, 8:41 PM EDT	Flash Flood Warning	RNK	Bedford, Franklin	5 hr
May 14, 9:10 PM EDT	Special Weather Statement	RNK	Bland	35 min
May 14, 9:16 PM EDT	Flash Flood Warning	RNK	Bland, Giles	4 hr
May 14, 9:23 PM EDT	Flash Flood Warning	RNK	Amherst, Bedford, Botetourt, Rockbridge, City of Buena Vista, City of Lexington	6 hr
May 15, 1:27 AM EDT	Areal Flood Advisory	RNK	Bedford, Franklin	6 hr
May 15, 1:39 AM EDT	Areal Flood Warning	RNK	Bedford, Franklin	6 hr
May 15, 3:15 AM EDT	Areal Flood Warning	RNK	Botetourt, Rockbridge, City of Buena Vista, City of Lexington	6 hr
May 15, 5:39 AM EDT	Flash Flood Watch	RNK	Amherst, Bedford, Botetourt, Carroll, Floyd, Franklin and 8 more	17 hr
May 15, 6:19 AM EDT	Dense Fog Advisory	RNK	Bland, Carroll, Floyd, Giles, Grayson, Montgomery and 6 more	4 hr
May 15, 1:11 PM EDT	Special Weather Statement	RNK	City of Galax	64 min
May 15, 4:57 PM EDT	Flash Flood Warning	RNK	Grayson	5 hr
May 15, 5:43 PM EDT	Special Weather Statement	RNK	Grayson	62 min
May 15, 5:47 PM EDT	Special Weather Statement	RNK	Wythe	58 min
May 15, 6:43 PM EDT	Severe Thunderstorm Warning	RNK	Pulaski, Wythe	62 min
May 15, 6:56 PM EDT	Flash Flood Warning	RNK	Bedford, Franklin	6 hr
May 15, 6:57 PM EDT	Severe Thunderstorm Warning	RNK	Bedford, Campbell, Franklin, Pittsylvania	63 min
May 15, 7:49 PM EDT	Special Weather Statement	RNK	Pulaski	56 min
May 14, 8:16 PM EDT	Special Weather Statement	RNK	Ashe	29 min
May 15, 3:38 PM EDT	Special Weather Statement	RNK	Alleghany	52 min
May 15, 3:46 PM EDT	Special Weather Statement	RNK	Watauga	59 min
May 15, 5:27 PM EDT	Flash Flood Warning	RNK	Ashe, Watauga	4 hr
May 15, 5:32 PM EDT	Special Weather Statement	RNK	Surry	58 min
May 15, 6:29 PM EDT	Severe Thunderstorm Warning	RNK	Stokes, Surry	33 min

Nearby

Areal Flood Warnings in Virginia, 2012 Every areal flood warning 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.