Alert archive / Minnesota / Dense Fog Advisories in 2021
Dense Fog Advisory 13, NWS Duluth, MN
NWS Duluth, MN issued this dense fog advisory at Aug 10, 2021, 3:38 AM CDT for 4 counties in Minnesota. It was in force for 6 hr.
The area
The counties it named.
The facts
- Issued
- Aug 10, 2021, 3:38 AM CDT (08:38 UTC)
- Expired
- Aug 10, 2021, 10:00 AM CDT
- In force
- 6 hr
- Issued by
- NWS Duluth, MN
Counties Carlton County, MN, Cook County, MN, Lake County, MN, Saint Louis County, MN
The radar
The Duluth radar (KDLH), 69 km from the middle of the area, began a volume at 08:40 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
International Fa, MN (KINL), launched 00:00Z, 8.6 hours before the alert went out and 174 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
- 1281 J/kg
- Mixed-layer CIN
- -95 J/kg
- Mixed-layer LCL
- 1326 m above ground
- 0-6 km bulk shear
- 37 kt
- 0-1 km storm-relative helicity
- 109 m²/s²
- 0-3 km storm-relative helicity
- 220 m²/s²
- Significant tornado parameter
- 0.5
- Supercell composite
- 5.0
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 Duluth, MN wrote its last area forecast discussion before this dense fog advisory went out at Aug 10, 1:10 AM CDT, 2 hours 28 minutes earlier.
Area forecast discussion, Aug 10, 1:10 AM CDT, 2 hours 28 minutes before
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</html>Hazardous weather outlook, Aug 9, 7:42 PM CDT, 7 hours 56 minutes before
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Special weather statement, Aug 10, 3:21 AM CDT, 17 minutes before
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</html>The office that day
Everything else NWS Duluth, MN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 9, 7:15 PM CDT | Marine Dense Fog Advisory | DLH | 15 hr | |
| Aug 10, 3:21 AM CDT | Special Weather Statement | DLH | Koochiching | 24 min |
| Aug 10, 3:45 AM CDT | Special Weather Statement | DLH | Koochiching | 15 min |
| Aug 10, 3:56 AM CDT | Special Weather Statement | DLH | Cass | 19 min |
| Aug 10, 4:14 AM CDT | Special Weather Statement | DLH | Cass | 16 min |
| Aug 10, 4:29 AM CDT | Special Weather Statement | DLH | Aitkin | 16 min |
| Aug 10, 4:52 AM CDT | Special Weather Statement | DLH | Aitkin | 23 min |
| Aug 10, 4:54 AM CDT | Special Weather Statement | DLH | Koochiching | 36 min |
| Aug 10, 5:22 AM CDT | Special Weather Statement | DLH | Carlton | 23 min |
| Aug 10, 5:27 AM CDT | Special Weather Statement | DLH | 33 min | |
| Aug 10, 5:58 AM CDT | Special Weather Statement | DLH | 32 min | |
| Aug 10, 12:20 PM CDT | Special Marine Warning | DLH | 55 min | |
| Aug 10, 1:33 PM CDT | Special Marine Warning | DLH | 57 min | |
| Aug 10, 1:40 PM CDT | Special Weather Statement | DLH | Cook | 35 min |
| Aug 10, 11:04 AM CDT | Special Weather Statement | DLH | Burnett | 26 min |
| Aug 10, 11:18 AM CDT | Special Weather Statement | DLH | Washburn | 27 min |
| Aug 10, 11:30 AM CDT | Special Weather Statement | DLH | Bayfield | 30 min |
| Aug 10, 11:39 AM CDT | Special Weather Statement | DLH | Douglas | 36 min |
| Aug 10, 11:46 AM CDT | Special Weather Statement | DLH | Bayfield | 44 min |
| Aug 10, 11:52 AM CDT | Severe Thunderstorm Warning | DLH | Ashland, Bayfield, Sawyer | 38 min |
| Aug 10, 12:21 PM CDT | Severe Thunderstorm Warning | DLH | Ashland, Iron | 39 min |
Nearby
Dense Fog Advisories in Minnesota, 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.