Alert archive / Virginia / Flood Watches in 2017
Flood Watch 3, NWS Blacksburg, VA
NWS Blacksburg, VA issued this flood watch at May 11, 2017, 6:19 AM EDT for 29 counties in Virginia; 5 counties in North Carolina; 4 counties in West Virginia. It took effect at May 12, 2017, 2:00 AM EDT. It was in force for 11 hr.
The area
The counties it named.
The facts
- Issued
- May 11, 2017, 6:19 AM EDT (10:19 UTC)
- In effect from
- May 12, 2017, 2:00 AM EDT
- Expired
- May 12, 2017, 12:37 PM EDT
- In force
- 11 hr
- Issued by
- NWS Blacksburg, VA
- Flood severity
- None
All 38 counties
Alleghany County, NC, Ashe County, NC, Surry County, NC, Watauga County, NC, Wilkes County, NC, Alleghany County, VA, Amherst County, VA, Bath County, VA, Bedford County, VA, Bland County, VA, Botetourt County, VA, Carroll County, VA, City of Buena Vista, VA, City of Covington, VA, City of Galax, VA, City of Lexington, 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, Pulaski County, VA, Roanoke County, VA, Rockbridge County, VA, Smyth County, VA, Tazewell County, VA, Wythe County, VA, Greenbrier County, WV, Mercer County, WV, Monroe County, WV, Summers County, WV
The radar
The Roanoke radar (KFCX), 21 km from the middle of the area, began a volume at 10:20 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, 10.3 hours before the alert went out and 84 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
- 13 J/kg
- Mixed-layer CIN
- -92 J/kg
- Mixed-layer LCL
- 2016 m above ground
- 0-6 km bulk shear
- 43 kt
- 0-1 km storm-relative helicity
- 64 m²/s²
- 0-3 km storm-relative helicity
- 72 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.4
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 11, 4:55 AM EDT, 1 hour 24 minutes earlier.
Area forecast discussion, May 11, 4:55 AM EDT, 1 hour 24 minutes before
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Hazardous Weather Outlook National Weather Service Blacksburg VA 308 PM EDT Wed May 10 2017 VAZ018>020-022>024-035-046-047-WVZ043-044-507-508-111915- Craig-Alleghany VA-Bath-Roanoke-Botetourt-Rockbridge-Amherst- Appomattox-Buckingham-Summers-Monroe-Eastern Greenbrier- Western Greenbrier- 308 PM EDT Wed May 10 2017 This Hazardous Weather Outlook is for central Virginia, southwest Virginia, west central Virginia and southeast West Virginia. .DAY ONE...This afternoon and tonight. The probability for widespread hazardous weather this afternoon and tonight is low. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday. Multiple rounds of showers and thunderstorms with periods of heavy rainfall are expected Thursday afternoon through Saturday. Rainfall of 1 to 3 inches will be possible across this region during this time frame. With saturated ground across the region as a result of repeated recent heavy rainfall, flooding, including river flooding, is expected to become a concern. In addition, there is a slight risk for severe thunderstorms across the area Thursday, with the main threat being quarter-sized hail. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time. NCZ001-002-018-VAZ007-009>017-WVZ042-111915- Ashe-Alleghany NC-Watauga-Tazewell-Smyth-Bland-Giles-Wythe-Pulaski- Montgomery-Grayson-Carroll-Floyd-Mercer- 308 PM EDT Wed May 10 2017 This Hazardous Weather Outlook is for northwest North Carolina, southwest Virginia and southeast West Virginia. .DAY ONE...This afternoon and tonight. The probability for widespread hazardous weather this afternoon and tonight is low. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday. Multiple rounds of showers and thunderstorms are expected Thursday through early Saturday. The heaviest rain is expected to occur Friday afternoon into Saturday. With saturated ground across the region as a result of repeated recent heavy rainfall, areal and river flooding, will once again become a concern. In addition, there is a marginal risk for severe thunderstorms across the area Thursday, with the main threat being quarter-sized hail. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time. NCZ003>006-019-020-VAZ032>034-043>045-058-059-111915- Surry-Stokes-Rockingham-Caswell-Wilkes-Yadkin-Patrick-Franklin- Bedford-Henry-Pittsylvania-Campbell-Halifax-Charlotte- 308 PM EDT Wed May 10 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...This afternoon and tonight. The probability for widespread hazardous weather this afternoon and tonight is low. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday. Multiple rounds of showers and thunderstorms are expected Thursday through early Saturday. The heaviest rain is expected to occur Friday night into Saturday. With saturated ground across the region as a result of repeated recent heavy rainfall, areal and river flooding, will once again become a concern. In addition, there is a marginal risk for severe thunderstorms across the area Thursday, with the main threat being quarter-sized hail. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time. RCS
In the hours before
Local storm report, May 11, 5:55 AM EDT, 24 minutes before
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</html>The office that day
Everything else NWS Blacksburg, VA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 10, 8:06 PM EDT | Tornado Warning | RNK | Campbell | 39 min |
| May 10, 8:34 PM EDT | Tornado Warning | RNK | Campbell, Charlotte, Halifax | 26 min |
| May 10, 8:45 PM EDT | Severe Thunderstorm Warning | RNK | Campbell, Charlotte, Halifax | 60 min |
| May 10, 8:58 PM EDT | Tornado Warning | RNK | Halifax | 32 min |
| May 10, 9:19 PM EDT | Severe Thunderstorm Warning | RNK | Charlotte, Halifax | 41 min |
| May 10, 9:37 PM EDT | Special Weather Statement | RNK | Appomattox, City of Lynchburg | 53 min |
| May 10, 9:45 PM EDT | Severe Thunderstorm Warning | RNK | Amherst, Appomattox, Campbell, Charlotte, City of Lynchburg | 60 min |
| May 10, 10:43 PM EDT | Special Weather Statement | RNK | Charlotte | 62 min |
| May 10, 11:20 PM EDT | Severe Thunderstorm Warning | RNK | Charlotte | 16 min |
| May 11, 6:19 AM EDT | Flash Flood Watch | RNK | Alleghany, Bath, Bland, Botetourt, Craig, Giles and 5 more | 16 hr |
| May 11, 6:08 PM EDT | Severe Thunderstorm Warning | RNK | Charlotte, Halifax | 67 min |
| May 11, 6:38 PM EDT | Special Weather Statement | RNK | Henry, City of Martinsville | 67 min |
| May 11, 6:49 PM EDT | Special Weather Statement | RNK | Bedford | 56 min |
| May 11, 7:15 PM EDT | Special Weather Statement | RNK | Patrick | 60 min |
| May 11, 7:18 PM EDT | Severe Thunderstorm Warning | RNK | Patrick | 57 min |
| May 11, 7:28 PM EDT | Severe Thunderstorm Warning | RNK | Henry, City of Martinsville | 62 min |
| May 11, 7:48 PM EDT | Severe Thunderstorm Warning | RNK | Caswell, Rockingham | 57 min |
| May 11, 5:26 PM EDT | Special Weather Statement | RNK | Mercer | 49 min |
Nearby
Flood Watches in Virginia, 2017Flood Watches in North Carolina, 2017Flood Watches in West Virginia, 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.