Alert archive / Tennessee / Dense Fog Advisories in 2021
Dense Fog Advisory 4, NWS Nashville, TN
NWS Nashville, TN issued this dense fog advisory at Jul 27, 2021, 3:08 AM CDT for 23 counties in Tennessee. It was in force for 5 hr.
The area
The counties it named.
The facts
- Issued
- Jul 27, 2021, 3:08 AM CDT (08:08 UTC)
- Expired
- Jul 27, 2021, 8:00 AM CDT
- In force
- 5 hr
- Issued by
- NWS Nashville, TN
All 23 counties
Bedford County, TN, Cannon County, TN, Clay County, TN, Coffee County, TN, Cumberland County, TN, DeKalb County, TN, Fentress County, TN, Giles County, TN, Grundy County, TN, Hickman County, TN, Jackson County, TN, Lawrence County, TN, Lewis County, TN, Marshall County, TN, Maury County, TN, Overton County, TN, Perry County, TN, Pickett County, TN, Putnam County, TN, Van Buren County, TN, Warren County, TN, Wayne County, TN, White County, TN
The radar
The Nashville radar (KOHX), 59 km from the middle of the area, began a volume at 08:13 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
Nashville Metro, TN (KBNA), launched 00:00Z, 8.1 hours before the alert went out and 51 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
- 2358 J/kg
- Mixed-layer CIN
- -24 J/kg
- Mixed-layer LCL
- 1095 m above ground
- 0-6 km bulk shear
- 14 kt
- 0-1 km storm-relative helicity
- -13 m²/s²
- 0-3 km storm-relative helicity
- 18 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.3
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 Nashville, TN wrote its last area forecast discussion before this dense fog advisory went out at Jul 27, 12:35 AM CDT, 2 hours 33 minutes earlier.
Area forecast discussion, Jul 27, 12:35 AM CDT, 2 hours 33 minutes before
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</html>Hazardous weather outlook, Jul 26, 5:02 AM CDT, 22 hours 6 minutes before
Hazardous Weather Outlook National Weather Service Nashville TN 502 AM CDT Mon Jul 26 2021 TNZ005>011-023>034-056>066-075-077>080-093>095-271000- Stewart-Montgomery-Robertson-Sumner-Macon-Clay-Pickett-Houston- Humphreys-Dickson-Cheatham-Davidson-Wilson-Trousdale-Smith-Jackson- Putnam-Overton-Fentress-Perry-Hickman-Lewis-Williamson-Maury- Marshall-Rutherford-Cannon-De Kalb-White-Cumberland-Bedford-Coffee- Warren-Grundy-Van Buren-Wayne-Lawrence-Giles- 502 AM CDT Mon Jul 26 2021 This Hazardous Weather Outlook is for Middle Tennessee. .DAY ONE...Today and tonight. A few of the stronger thunderstorms this afternoon could bring heavy downpours resulting in minor localized flooding. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. No hazardous weather is expected at this time. .SPOTTER INFORMATION STATEMENT... No hazardous weather is expected at this time. JB Wright
The office that day
Everything else NWS Nashville, TN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 26, 8:12 PM CDT | Special Weather Statement | OHX | Davidson | 33 min |
| Jul 27, 12:51 PM CDT | Special Weather Statement | OHX | Sumner | 24 min |
Nearby
Dense 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.