Alert archive / Virginia / Flash Flood Watches in 2018
Flash Flood Watch 16, NWS Blacksburg, VA
NWS Blacksburg, VA issued this flash flood watch at Sep 26, 2018, 3:56 PM EDT for 13 counties in Virginia; 9 counties in North Carolina. It was in force for 4 hr.
The area
The counties it named.
The facts
- Issued
- Sep 26, 2018, 3:56 PM EDT (19:56 UTC)
- Expired
- Sep 26, 2018, 7:56 PM EDT
- In force
- 4 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, Bedford County, VA, Campbell County, VA, Carroll County, VA, City of Danville, VA, City of Galax, VA, City of Lynchburg, VA, City of Martinsville, VA, Floyd County, VA, Franklin County, VA, Grayson County, VA, Henry County, VA, Patrick County, VA, Pittsylvania County, VA
The radar
The Roanoke radar (KFCX), 41 km from the middle of the area, began a volume at 19:57 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 12:00Z, 7.9 hours before the alert went out and 73 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
- 45 J/kg
- Mixed-layer CIN
- -126 J/kg
- Mixed-layer LCL
- 848 m above ground
- 0-6 km bulk shear
- 11 kt
- 0-1 km storm-relative helicity
- 111 m²/s²
- 0-3 km storm-relative helicity
- 75 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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 Sep 26, 3:56 PM EDT, 0 minutes earlier.
Area forecast discussion, Sep 26, 3:56 PM EDT, 0 minutes before
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</html>Hazardous weather outlook, Sep 26, 5:13 AM EDT, 10 hours 43 minutes before
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Special weather statement, Sep 26, 3:03 PM EDT, 53 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 |
|---|---|---|---|---|
| Sep 26, 4:04 PM EDT | Special Weather Statement | RNK | Amherst | 56 min |
| Sep 26, 4:09 PM EDT | Special Weather Statement | RNK | Franklin, City of Martinsville | 66 min |
| Sep 26, 4:54 PM EDT | Special Weather Statement | RNK | Buckingham | 66 min |
| Sep 26, 5:12 PM EDT | Special Weather Statement | RNK | Appomattox, City of Lynchburg | 63 min |
| Sep 26, 5:31 PM EDT | Areal Flood Advisory | RNK | Franklin, Henry, Patrick, City of Martinsville | 93 min |
| Sep 26, 5:56 PM EDT | Special Weather Statement | RNK | Buckingham | 64 min |
| Sep 26, 6:41 PM EDT | Special Weather Statement | RNK | Charlotte, Halifax, City of Danville | 64 min |
| Sep 26, 3:03 PM EDT | Special Weather Statement | RNK | Wilkes | 57 min |
Nearby
Flash Flood Watches in Virginia, 2018Flash Flood Watches in North Carolina, 2018Every flash flood watch in 2018
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.