Alert archive / Virginia / Flood Watches in 2017
Flood Watch 5, NWS Blacksburg, VA
NWS Blacksburg, VA issued this flood watch at May 23, 2017, 3:22 AM EDT for 13 counties in Virginia; 9 counties in North Carolina. It was in force for 23 hr.
The area
The counties it named.
The facts
- Issued
- May 23, 2017, 3:22 AM EDT (07:22 UTC)
- Expired
- May 24, 2017, 2:00 AM EDT
- In force
- 23 hr
- Issued by
- NWS Blacksburg, VA
- Flood severity
- None
All 22 counties
Alleghany County, NC, Ashe County, NC, Caswell County, NC, Rockingham County, NC, Stokes County, NC, Surry County, NC, Watauga County, NC, Wilkes County, NC, Yadkin County, NC, Bland County, VA, Carroll County, VA, City of Danville, VA, City of Galax, VA, City of Martinsville, VA, Grayson County, VA, Halifax County, VA, Henry County, VA, Patrick County, VA, Pittsylvania County, VA, Smyth County, VA, Tazewell County, VA, Wythe County, VA
The radar
The Roanoke radar (KFCX), 52 km from the middle of the area, began a volume at 07:22 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 00:00Z, 7.4 hours before the alert went out and 83 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.
- Mixed-layer CAPE
- 163 J/kg
- Mixed-layer CIN
- -13 J/kg
- Mixed-layer LCL
- 1271 m above ground
- 0-6 km bulk shear
- 22 kt
- 0-1 km storm-relative helicity
- 17 m²/s²
- 0-3 km storm-relative helicity
- 41 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.6
What forecasters said that day
The local office's own words before this 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 flood watch went out at May 23, 3:11 AM EDT, 11 minutes earlier.
Area forecast discussion, May 23, 3:11 AM EDT, 11 minutes before
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</html>Hazardous weather outlook, May 22, 3:58 AM EDT, 23 hours 24 minutes before
Hazardous Weather Outlook National Weather Service Blacksburg VA 358 AM EDT Mon May 22 2017 VAZ007-009>014-018>020-022>024-035-WVZ042>044-507-508-230800- Tazewell-Smyth-Bland-Giles-Wythe-Pulaski-Montgomery-Craig- Alleghany VA-Bath-Roanoke-Botetourt-Rockbridge-Amherst-Mercer- Summers-Monroe-Eastern Greenbrier-Western Greenbrier- 358 AM EDT Mon May 22 2017 This Hazardous Weather Outlook is for central Virginia, southwest Virginia, west central Virginia and southeast West Virginia. .DAY ONE...Today and tonight. The probability for widespread hazardous weather is low. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. The probability for widespread hazardous weather is low. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time. NCZ001>006-018>020-VAZ015>017-032>034-043>047-058-059-230800- Ashe-Alleghany NC-Surry-Stokes-Rockingham-Caswell-Watauga-Wilkes- Yadkin-Grayson-Carroll-Floyd-Patrick-Franklin-Bedford-Henry- Pittsylvania-Campbell-Appomattox-Buckingham-Halifax-Charlotte- 358 AM EDT Mon May 22 2017 This Hazardous Weather Outlook is for north central North Carolina, northwest North Carolina, central Virginia, south central Virginia, southwest Virginia and west central Virginia. .DAY ONE...Today and tonight. There is a low probability for widespread hazardous weather. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. Periods of heavy rain may cause flooding on Tuesday and Wednesday, with the potential for river flooding extending through later in the week. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time.
The office that day
Everything else NWS Blacksburg, VA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 23, 1:20 AM EDT | Areal Flood Advisory | RNK | Halifax | 3 hr |
| May 23, 7:12 AM EDT | Areal Flood Advisory | RNK | Halifax, Pittsylvania | 3 hr |
| May 23, 7:41 AM EDT | River Flood Warning | RNK | Halifax | 4 days |
| May 23, 10:09 AM EDT | River Flood Warning | RNK | Pittsylvania, City of Danville | 48 hr |
| May 23, 10:09 AM EDT | River Flood Warning | RNK | Halifax | 3 days |
| May 23, 3:29 PM EDT | Areal Flood Advisory | RNK | Halifax, Pittsylvania, City of Danville | 4 hr |
| May 23, 3:33 PM EDT | Areal Flood Advisory | RNK | Charlotte, Halifax | 5 hr |
| May 22, 8:13 PM EDT | Special Weather Statement | RNK | Wilkes | 32 min |
| May 22, 8:44 PM EDT | Special Weather Statement | RNK | Wilkes | 31 min |
| May 22, 11:50 PM EDT | Areal Flood Advisory | RNK | Yadkin | 3 hr |
| May 23, 2:24 AM EDT | Areal Flood Advisory | RNK | Wilkes | 4 hr |
Nearby
Flood Watches in Virginia, 2017Flood Watches in North Carolina, 2017Every flood watch in 2017
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.