Alert archive / Virginia / Flash Flood Watches in 2024

Flash Flood Watch 2, NWS Blacksburg, VA

August 9, 2024Buckingham County, Virginia

NWS Blacksburg, VA issued this flash flood watch at Aug 9, 2024, 11:11 AM EDT for Buckingham County, Virginia. It was in force for 23 hr.

The area

The counties it named.

The facts

Issued: Aug 9, 2024, 11:11 AM EDT (15:11 UTC)
Expired: Aug 10, 2024, 10:00 AM EDT
In force: 23 hr
Issued by: NWS Blacksburg, VA
Flood severity: None

County Buckingham County, VA

The radar

The Norfolk radar (KAKQ), 150 km from the middle of the area, began a volume at 15:11 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

Washington/Dulle, VA (KIAD), launched 12:00Z, 3.2 hours before the alert went out and 182 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: 284 J/kg
Mixed-layer CIN: -1 J/kg
Mixed-layer LCL: 620 m above ground
0-6 km bulk shear: 36 kt
0-1 km storm-relative helicity: 267 m²/s²
0-3 km storm-relative helicity: 271 m²/s²
Significant tornado parameter: 0.3
Supercell composite: 7.2

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this flash flood watch 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 flash flood watch went out at Aug 9, 6:47 AM EDT, 4 hours 24 minutes earlier.

Area forecast discussion, Aug 9, 6:47 AM EDT, 4 hours 24 minutes before

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Hazardous weather outlook, Aug 9, 4:07 AM EDT, 7 hours 4 minutes before

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In the hours before

Local storm report, Aug 9, 9:01 AM EDT, 2 hours 10 minutes before

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Local storm report, Aug 9, 9:22 AM EDT, 1 hour 49 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
Aug 8, 8:59 PM EDT	Flash Flood Warning	RNK	Alleghany, Bath, Botetourt, Rockbridge, City of Buena Vista, City of Lexington	8 hr
Aug 8, 9:31 PM EDT	Areal Flood Warning	RNK	Charlotte, Halifax	12 hr
Aug 8, 9:57 PM EDT	Areal Flood Warning	RNK	Franklin, Henry, Patrick, Pittsylvania, City of Danville, City of Martinsville	12 hr
Aug 8, 11:12 PM EDT	Areal Flood Warning	RNK	Floyd, Montgomery	2 hr
Aug 9, 1:42 AM EDT	Areal Flood Advisory	RNK	Alleghany, Bath, City of Covington	3 hr
Aug 9, 2:13 AM EDT	Areal Flood Warning	RNK	Amherst, Appomattox, Bedford, Buckingham, Campbell, City of Lynchburg	8 hr
Aug 9, 10:26 AM EDT	Areal Flood Warning	RNK	Charlotte, Halifax	6 hr
Aug 9, 11:50 AM EDT	River Flood Warning	RNK	Charlotte, Halifax	18 hr
Aug 8, 9:15 PM EDT	Areal Flood Warning	RNK	Caswell, Rockingham, Stokes	10 hr
Aug 9, 7:36 PM EDT	Special Weather Statement	RNK	Yadkin	24 min

Nearby

Flash Flood Watches in Virginia, 2024 Every flash flood watch in 2024

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.