Alert archive / North Carolina / Dense Fog Advisories in 2021
Dense Fog Advisory 4, NWS Morristown, TN
NWS Morristown, TN issued this dense fog advisory at Aug 27, 2021, 3:11 AM EDT for Polk County, Tennessee; Cherokee County, Clay County, North Carolina. It was in force for 7 hr.
The area
The counties it named.
The facts
- Issued
- Aug 27, 2021, 3:11 AM EDT (07:11 UTC)
- Expired
- Aug 27, 2021, 10:00 AM EDT
- In force
- 7 hr
- Issued by
- NWS Morristown, TN
Counties Cherokee County, NC, Clay County, NC, Polk County, TN
The radar
The Knoxville radar (KMRX), 135 km from the middle of the area, began a volume at 07:11 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
Peachtre/Fal Fld, GA (KFFC), launched 00:00Z, 7.2 hours before the alert went out and 196 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
- 853 J/kg
- Mixed-layer CIN
- -7 J/kg
- Mixed-layer LCL
- 1324 m above ground
- 0-6 km bulk shear
- 15 kt
- 0-1 km storm-relative helicity
- 37 m²/s²
- 0-3 km storm-relative helicity
- 48 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 Morristown, TN wrote its last area forecast discussion before this dense fog advisory went out at Aug 26, 7:18 PM EDT, 7 hours 53 minutes earlier.
Area forecast discussion, Aug 26, 7:18 PM EDT, 7 hours 53 minutes before
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</html>Hazardous weather outlook, Aug 26, 3:57 AM EDT, 23 hours 14 minutes before
Hazardous Weather Outlook National Weather Service Morristown TN 357 AM EDT Thu Aug 26 2021 NCZ060-061-TNZ012>018-035>047-067>074-081>087-098>102-VAZ001-002- 005-006-008-270800- Cherokee-Clay-Scott-Campbell-Claiborne-Hancock-Hawkins-Sullivan- Johnson-Morgan-Anderson-Union-Grainger-Hamblen-Northwest Cocke- Cocke Smoky Mountains-Northwest Greene-Southeast Greene- Washington-Unicoi-Northwest Carter-Southeast Carter-Roane-Loudon- Knox-Jefferson-Northwest Blount-Blount Smoky Mountains- North Sevier-Sevier Smoky Mountains-Sequatchie-Bledsoe-Rhea-Meigs- McMinn-Northwest Monroe-Southeast Monroe-Marion-Hamilton-Bradley- West Polk-East Polk-Lee-Wise-Russell- 357 AM EDT Thu Aug 26 2021 /257 AM CDT Thu Aug 26 2021/ This Hazardous Weather Outlook is for portions of southwest North Carolina...east Tennessee and southwest Virginia. .DAY ONE...Today and Tonight Isolated to scattered showers and thunderstorms are forecast today, a few of which could be strong to severe with damaging winds, frequent lightning, and heavy rainfall rates being the primary threats. .DAYS TWO THROUGH SEVEN...Friday through Wednesday The probability for widespread hazardous weather is low. .SPOTTER INFORMATION STATEMENT... Spotter activation is not needed at this time. Please relay any reports of thunderstorm damage or severe weather.
The office that day
Everything else NWS Morristown, TN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 27, 7:21 PM EDT | Special Weather Statement | MRX | Sullivan | 39 min |
| Aug 26, 8:08 PM EDT | Areal Flood Advisory | MRX | Russell, Scott | 3 hr |
| Aug 27, 6:15 PM EDT | Special Weather Statement | MRX | Washington | 45 min |
Nearby
Dense Fog Advisories in North Carolina, 2021Dense Fog Advisories in Tennessee, 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.