Alert archive / Michigan / Dense Fog Advisories in 2021
Dense Fog Advisory 4, NWS Gaylord, MI
NWS Gaylord, MI issued this dense fog advisory at Dec 16, 2021, 12:04 AM EST for 11 counties in Michigan. It took effect at Dec 16, 2021, 1:00 AM EST. It was in force for 6 hr.
The area
The counties it named.
The facts
- Issued
- Dec 16, 2021, 12:04 AM EST (05:04 UTC)
- In effect from
- Dec 16, 2021, 1:00 AM EST
- Expired
- Dec 16, 2021, 7:00 AM EST
- In force
- 6 hr
- Issued by
- NWS Gaylord, MI
Counties Chippewa County, MI, Crawford County, MI, Kalkaska County, MI, Mackinac County, MI, Missaukee County, MI, Montmorency County, MI, Ogemaw County, MI, Oscoda County, MI, Otsego County, MI, Roscommon County, MI, Wexford County, MI
The radar
The NCL Michigan radar (KAPX), 6 km from the middle of the area, began a volume at 05:03 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
Green Bay/Straub, WI (KGRB), launched 00:00Z, 5.1 hours before the alert went out and 276 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
- 29 J/kg
- Mixed-layer CIN
- -469 J/kg
- Mixed-layer LCL
- 505 m above ground
- 0-6 km bulk shear
- 60 kt
- 0-1 km storm-relative helicity
- 689 m²/s²
- 0-3 km storm-relative helicity
- 687 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 Gaylord, MI wrote its last area forecast discussion before this dense fog advisory went out at Dec 15, 3:44 PM EST, 8 hours 20 minutes earlier.
Area forecast discussion, Dec 15, 3:44 PM EST, 8 hours 20 minutes before
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</html>Hazardous weather outlook, Dec 15, 3:53 PM EST, 8 hours 11 minutes before
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Special weather statement, Dec 15, 6:26 PM EST, 5 hours 38 minutes before
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</html>Special weather statement, Dec 15, 6:28 PM EST, 5 hours 36 minutes before
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</html>Nearby
Dense Fog Advisories in Michigan, 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.