Alert archive / West Virginia / Dense Fog Advisories in 2021
Dense Fog Advisory 1, NWS Charleston, WV
NWS Charleston, WV issued this dense fog advisory at Aug 20, 2021, 1:00 AM EDT for 28 counties in West Virginia; 9 counties in Ohio; 4 counties in Kentucky. It was in force for 9 hr.
The area
The counties it named.
The facts
- Issued
- Aug 20, 2021, 1:00 AM EDT (05:00 UTC)
- Expired
- Aug 20, 2021, 10:00 AM EDT
- In force
- 9 hr
- Issued by
- NWS Charleston, WV
All 41 counties
Boyd County, KY, Carter County, KY, Greenup County, KY, Lawrence County, KY, Athens County, OH, Gallia County, OH, Jackson County, OH, Lawrence County, OH, Meigs County, OH, Morgan County, OH, Perry County, OH, Vinton County, OH, Washington County, OH, Barbour County, WV, Boone County, WV, Braxton County, WV, Cabell County, WV, Calhoun County, WV, Clay County, WV, Doddridge County, WV, Gilmer County, WV, Harrison County, WV, Jackson County, WV, Kanawha County, WV, Lewis County, WV, Lincoln County, WV, Logan County, WV, Mason County, WV, McDowell County, WV, Mingo County, WV, Pleasants County, WV, Putnam County, WV, Ritchie County, WV, Roane County, WV, Taylor County, WV, Tyler County, WV, Upshur County, WV, Wayne County, WV, Wirt County, WV, Wood County, WV, Wyoming County, WV
The radar
The Charleston,WV radar (KRLX), 50 km from the middle of the area, began a volume at 05:00 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
Pittsburgh, PA (KPIT), launched 00:00Z, 5.0 hours before the alert went out and 226 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
- 318 J/kg
- Mixed-layer CIN
- -17 J/kg
- Mixed-layer LCL
- 804 m above ground
- 0-6 km bulk shear
- 15 kt
- 0-1 km storm-relative helicity
- -18 m²/s²
- 0-3 km storm-relative helicity
- -13 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
What forecasters said that day
The local office's own words before this dense fog advisory went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Charleston, WV wrote its last area forecast discussion before this dense fog advisory went out at Aug 19, 7:27 PM EDT, 5 hours 33 minutes earlier.
Area forecast discussion, Aug 19, 7:27 PM EDT, 5 hours 33 minutes before
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</html>Hazardous weather outlook, Aug 19, 5:24 AM EDT, 19 hours 36 minutes before
Hazardous Weather Outlook National Weather Service Charleston WV 524 AM EDT Thu Aug 19 2021 KYZ101>103-105-VAZ003-004-WVZ005-006-013>016-024>028-033-034-515- 200930- Greenup-Carter-Boyd-Lawrence KY-Dickenson-Buchanan-Wayne-Cabell- Lincoln-Putnam-Kanawha-Roane-Mingo-Logan-Boone-Clay-Braxton-McDowell- Wyoming-Northwest Raleigh- 524 AM EDT Thu Aug 19 2021 This Hazardous Weather Outlook is for northeast Kentucky, southwest Virginia, and portions of central West Virginia, southeast West Virginia, southern West Virginia and western West Virginia. .DAY ONE...Today and Tonight. The area is under a slight risk for excessive rainfall today. Isolated water issues will be possible with any slow moving or repetitive showers and storms due to sensitive soil conditions from recent rainfall. .DAYS TWO THROUGH SEVEN...Friday through Wednesday. No hazardous weather is expected at this time. .SPOTTER INFORMATION STATEMENT... Weather spotters are encouraged to report significant weather conditions by calling the toll-free spotter hotline, or by other methods detailed at www.weather.gov/rlx/reports. OHZ066-067-075-076-083>087-WVZ007>011-017>020-029>032-039-040-200930- Perry-Morgan-Athens-Washington-Jackson OH-Vinton-Meigs-Gallia- Lawrence OH-Mason-Jackson WV-Wood-Pleasants-Tyler-Wirt-Calhoun- Ritchie-Doddridge-Gilmer-Lewis-Harrison-Taylor-Upshur-Barbour- 524 AM EDT Thu Aug 19 2021 This Hazardous Weather Outlook is for southeast Ohio, and portions of central West Virginia, northern West Virginia and western West Virginia. .DAY ONE...Today and Tonight. The area is under a marginal risk for excessive rainfall today. Isolated water issues will be possible with any slow moving or repetitive showers and storms due to sensitive soil conditions from recent rainfall. .DAYS TWO THROUGH SEVEN...Friday through Wednesday. No hazardous weather is expected at this time. .SPOTTER INFORMATION STATEMENT... Weather spotters are encouraged to report significant weather conditions by calling the toll-free spotter hotline, or by other methods detailed at www.weather.gov/rlx/reports. WVZ516>526-200930- Southeast Raleigh-Northwest Fayette-Southeast Fayette- Northwest Nicholas-Southeast Nicholas-Northwest Webster- Southeast Webster-Northwest Pocahontas-Southeast Pocahontas- Northwest Randolph-Southeast Randolph- 524 AM EDT Thu Aug 19 2021 This Hazardous Weather Outlook is for portions of northeast West Virginia and southeast West Virginia. .DAY ONE...Today and Tonight. The area is under a slight risk for excessive rainfall today. Isolated water issues will be possible with any slow moving or repetitive showers and storms due to sensitive soil conditions from recent rainfall. .DAYS TWO THROUGH SEVEN...Friday through Wednesday. The area is under a marginal risk for excessive rainfall Friday. Isolated water issues will be possible with any slow moving or repetitive showers and storms due to sensitive soil conditions from recent rainfall. .SPOTTER INFORMATION STATEMENT... Weather spotters are encouraged to report significant weather conditions by calling the toll-free spotter hotline, or by other methods detailed at www.weather.gov/rlx/reports.
The office that day
Everything else NWS Charleston, WV issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 20, 5:00 PM EDT | Special Weather Statement | RLX | Pocahontas | 45 min |
Nearby
Dense Fog Advisories in West Virginia, 2021Dense Fog Advisories in Ohio, 2021Dense Fog Advisories in Kentucky, 2021Every dense fog advisory in 2021
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.