Alert archive / Virginia / Flash Flood Watches in 2019

Flash Flood Watch 5, NWS Blacksburg, VA

June 18, 201926 counties in Virginia; 8 counties in North Carolina; Mercer County, West Virginia

NWS Blacksburg, VA issued this flash flood watch at Jun 18, 2019, 4:54 AM EDT for 26 counties in Virginia; 8 counties in North Carolina; Mercer County, West Virginia. It took effect at Jun 18, 2019, 12:00 PM EDT. It was in force for 11 hr.

The area

The counties it named.

The facts

Issued: Jun 18, 2019, 4:54 AM EDT (08:54 UTC)
In effect from: Jun 18, 2019, 12:00 PM EDT
Expired: Jun 18, 2019, 10:31 PM EDT
In force: 11 hr
Issued by: NWS Blacksburg, VA
Flood severity: None

All 35 counties

Alleghany County, NC, Ashe County, NC, Rockingham County, NC, Stokes County, NC, Surry County, NC, Watauga County, NC, Wilkes County, NC, Yadkin County, NC, Bedford County, VA, Bland County, VA, Botetourt County, VA, Campbell County, VA, Carroll County, VA, City of Danville, VA, City of Galax, VA, City of Lynchburg, VA, City of Martinsville, VA, City of Radford, VA, City of Roanoke, VA, City of Salem, VA, Craig County, VA, Floyd County, VA, Franklin County, VA, Giles County, VA, Grayson County, VA, Henry County, VA, Montgomery County, VA, Patrick County, VA, Pittsylvania County, VA, Pulaski County, VA, Roanoke County, VA, Smyth County, VA, Tazewell County, VA, Wythe County, VA, Mercer County, WV

The radar

The Roanoke radar (KFCX), 21 km from the middle of the area, began a volume at 08:55 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 00:00Z, 8.9 hours before the alert went out and 352 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: 698 J/kg
Mixed-layer CIN: -46 J/kg
Mixed-layer LCL: 1158 m above ground
0-6 km bulk shear: 33 kt
0-1 km storm-relative helicity: 134 m²/s²
0-3 km storm-relative helicity: 228 m²/s²
Significant tornado parameter: 0.4
Supercell composite: 2.9

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 Jun 18, 2:03 AM EDT, 2 hours 51 minutes earlier.

Area forecast discussion, Jun 18, 2:03 AM EDT, 2 hours 51 minutes before

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Hazardous weather outlook, Jun 17, 9:29 PM EDT, 7 hours 25 minutes before

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In the hours before

Local storm report, Jun 17, 11:10 PM EDT, 5 hours 44 minutes before

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Local storm report, Jun 18, 12:42 AM EDT, 4 hours 12 minutes before

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Local storm report, Jun 18, 12:43 AM EDT, 4 hours 11 minutes before

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Local storm report, Jun 18, 3:35 AM EDT, 1 hour 19 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
Jun 18, 1:26 PM EDT	Special Weather Statement	RNK	Franklin	49 min
Jun 18, 1:30 PM EDT	Special Weather Statement	RNK	Halifax	45 min
Jun 18, 1:52 PM EDT	Special Weather Statement	RNK	Bedford	53 min
Jun 18, 2:04 PM EDT	Special Weather Statement	RNK	Pittsylvania	41 min
Jun 18, 2:19 PM EDT	Special Weather Statement	RNK	Halifax	41 min
Jun 18, 2:20 PM EDT	Special Weather Statement	RNK	Franklin	55 min
Jun 18, 2:23 PM EDT	Severe Thunderstorm Warning	RNK	Franklin, Henry, Pittsylvania	67 min
Jun 18, 3:02 PM EDT	Severe Thunderstorm Warning	RNK	Campbell, Halifax, Pittsylvania	58 min
Jun 18, 3:22 PM EDT	Tornado Warning	RNK	Campbell, Charlotte, Halifax	23 min
Jun 18, 3:51 PM EDT	Severe Thunderstorm Warning	RNK	Charlotte, Halifax, Pittsylvania	54 min
Jun 18, 4:00 PM EDT	Special Weather Statement	RNK	Henry, City of Martinsville	60 min
Jun 18, 4:21 PM EDT	Severe Thunderstorm Warning	RNK	Charlotte, Halifax	54 min
Jun 18, 4:39 PM EDT	Flash Flood Warning	RNK	Floyd, Franklin, Patrick	5 hr
Jun 18, 4:44 PM EDT	Areal Flood Advisory	RNK	Carroll, Grayson, Wythe, City of Galax	3 hr
Jun 18, 4:50 PM EDT	Areal Flood Advisory	RNK	Halifax	3 hr
Jun 18, 4:55 PM EDT	Special Weather Statement	RNK	Buckingham	65 min
Jun 18, 5:10 PM EDT	Special Weather Statement	RNK	Pittsylvania	65 min
Jun 18, 5:33 PM EDT	Special Weather Statement	RNK	Henry	57 min
Jun 18, 6:07 PM EDT	Severe Thunderstorm Warning	RNK	City of Danville	53 min
Jun 18, 6:12 PM EDT	Areal Flood Advisory	RNK	Carroll, Floyd, Patrick	3 hr
Jun 18, 6:55 PM EDT	Areal Flood Advisory	RNK	Henry, Pittsylvania, City of Danville, City of Martinsville	4 hr
Jun 17, 8:16 PM EDT	Areal Flood Advisory	RNK	Stokes, Surry	3 hr
Jun 17, 8:46 PM EDT	Special Weather Statement	RNK	Rockingham	59 min
Jun 17, 8:53 PM EDT	Special Weather Statement	RNK	Alleghany, Wilkes	52 min
Jun 17, 9:06 PM EDT	Flash Flood Warning	RNK	Stokes, Surry, Wilkes	6 hr
Jun 17, 9:12 PM EDT	Areal Flood Advisory	RNK	Alleghany, Ashe, Surry, Wilkes, Yadkin	6 hr
Jun 17, 10:03 PM EDT	Flash Flood Warning	RNK	Stokes, Surry	6 hr
Jun 18, 2:59 PM EDT	Special Weather Statement	RNK	Alleghany, Wilkes	46 min
Jun 18, 5:27 PM EDT	Flash Flood Warning	RNK	Alleghany, Ashe, Watauga, Wilkes	4 hr
Jun 18, 5:56 PM EDT	Special Weather Statement	RNK	Rockingham	64 min
Jun 18, 6:16 PM EDT	Flash Flood Warning	RNK	Alleghany, Surry, Wilkes, Yadkin	3 hr
Jun 18, 6:39 PM EDT	Special Weather Statement	RNK	Stokes	66 min
Jun 18, 7:23 PM EDT	Areal Flood Advisory	RNK	Stokes	4 hr
Jun 18, 7:29 PM EDT	Special Weather Statement	RNK	Yadkin	61 min
Jun 18, 7:34 PM EDT	Flash Flood Warning	RNK	Rockingham	3 hr
Jun 18, 7:46 PM EDT	Flash Flood Warning	RNK	Rockingham, Stokes	2 hr

Nearby

Flash Flood Watches in Virginia, 2019 Flash Flood Watches in North Carolina, 2019 Flash Flood Watches in West Virginia, 2019 Every flash flood watch in 2019

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.