Alert archive / Minnesota / Dense Fog Advisories in 2021
Dense Fog Advisory 2, NWS Twin Cities, MN
NWS Twin Cities, MN issued this dense fog advisory at Jan 2, 2021, 1:57 PM CST for 21 counties in Minnesota; 9 counties in Wisconsin. It took effect at Jan 2, 2021, 6:00 PM CST. It was in force for 18 hr.
The area
The counties it named.
The facts
- Issued
- Jan 2, 2021, 1:57 PM CST (19:57 UTC)
- In effect from
- Jan 2, 2021, 6:00 PM CST
- Expired
- Jan 3, 2021, 12:00 PM CST
- In force
- 18 hr
- Issued by
- NWS Twin Cities, MN
All 30 counties
Anoka County, MN, Blue Earth County, MN, Carver County, MN, Chisago County, MN, Dakota County, MN, Faribault County, MN, Freeborn County, MN, Goodhue County, MN, Hennepin County, MN, Isanti County, MN, Le Sueur County, MN, Martin County, MN, Nicollet County, MN, Ramsey County, MN, Rice County, MN, Scott County, MN, Sibley County, MN, Steele County, MN, Waseca County, MN, Washington County, MN, Watonwan County, MN, Barron County, WI, Chippewa County, WI, Dunn County, WI, Eau Claire County, WI, Pepin County, WI, Pierce County, WI, Polk County, WI, Rusk County, WI, Saint Croix County, WI
The radar
The Minneapolis radar (KMPX), 45 km from the middle of the area, began a volume at 19:59 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
Minneapolis, MN (KMPX), launched 12:00Z, 8.0 hours before the alert went out and 47 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1326 m above ground
- 0-6 km bulk shear
- 12 kt
- 0-1 km storm-relative helicity
- 38 m²/s²
- 0-3 km storm-relative helicity
- 45 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
002 WWUS73 KMPX 021957 NPWMPX URGENT - WEATHER MESSAGE National Weather Service Twin Cities/Chanhassen MN 157 PM CST Sat Jan 2 2021 MNZ052-053-060>063-067>070-075>078-082>085-091>093-WIZ014>016- 023>028-030400- /O.NEW.KMPX.FG.Y.0002.210103T0000Z-210103T1600Z/ Isanti-Chisago-Hennepin-Anoka-Ramsey-Washington-Sibley-Carver- Scott-Dakota-Nicollet-Le Sueur-Rice-Goodhue-Watonwan-Blue Earth- Waseca-Steele-Martin-Faribault-Freeborn-Polk-Barron-Rusk- St. Croix-Pierce-Dunn-Pepin-Chippewa-Eau Claire- Including the cities of Cambridge, Center City, Minneapolis, Blaine, St Paul, Stillwater, Gaylord, Chanhassen, Chaska, Victoria, Shakopee, Hastings, St Peter, Le Sueur, Faribault, Red Wing, St James, Mankato, Waseca, Owatonna, Fairmont, Blue Earth, Albert Lea, Osceola, Rice Lake, Ladysmith, Hudson, River Falls, Menomonie, Durand, Chippewa Falls, and Eau Claire 157 PM CST Sat Jan 2 2021 ...DENSE FOG ADVISORY IN EFFECT FROM 6 PM THIS EVENING TO 10 AM CST SUNDAY... * WHAT...Visibility one quarter mile or less in dense fog may develop again later tonight. * WHERE...Portions of northwest and west central Wisconsin and central, east central, south central and southeast Minnesota. * WHEN...From 6 PM this evening to 10 AM CST Sunday. * IMPACTS...Hazardous driving conditions due to low visibility. * ADDITIONAL DETAILS...Slick spots on roads, overpasses, and sidewalks are also possible as the fog freezes on exposed surfaces. PRECAUTIONARY/PREPAREDNESS ACTIONS... If driving, slow down, use your headlights, and leave plenty of distance ahead of you. && $$ jrb
5 follow-up statements
654 WWUS73 KMPX 030036 NPWMPX URGENT - WEATHER MESSAGE National Weather Service Twin Cities/Chanhassen MN 636 PM CST Sat Jan 2 2021 MNZ052-053-060>063-067>070-075>078-082>085-091>093-WIZ014>016- 023>028-031000- /O.CON.KMPX.FG.Y.0002.000000T0000Z-210103T1600Z/ Isanti-Chisago-Hennepin-Anoka-Ramsey-Washington-Sibley-Carver- Scott-Dakota-Nicollet-Le Sueur-Rice-Goodhue-Watonwan-Blue Earth- Waseca-Steele-Martin-Faribault-Freeborn-Polk-Barron-Rusk- St. Croix-Pierce-Dunn-Pepin-Chippewa-Eau Claire- Including the cities of Cambridge, Center City, Minneapolis, Blaine, St Paul, Stillwater, Gaylord, Chanhassen, Chaska, Victoria, Shakopee, Hastings, St Peter, Le Sueur, Faribault, Red Wing, St James, Mankato, Waseca, Owatonna, Fairmont, Blue Earth, Albert Lea, Osceola, Rice Lake, Ladysmith, Hudson, River Falls, Menomonie, Durand, Chippewa Falls, and Eau Claire 636 PM CST Sat Jan 2 2021 ...DENSE FOG ADVISORY REMAINS IN EFFECT UNTIL 10 AM CST SUNDAY... * WHAT...Visibility one quarter mile or less in dense fog. * WHERE...Portions of northwest and west central Wisconsin and central, east central, south central and southeast Minnesota. * WHEN...From 6 PM this evening to 10 AM CST Sunday. * IMPACTS...Hazardous driving conditions due to low visibility. * ADDITIONAL DETAILS...Slick spots on roads, overpasses, and sidewalks are also possible as the fog freezes on exposed surfaces. PRECAUTIONARY/PREPAREDNESS ACTIONS... If driving, slow down, use your headlights, and leave plenty of distance ahead of you. && $$
384 WWUS73 KMPX 030932 NPWMPX URGENT - WEATHER MESSAGE National Weather Service Twin Cities/Chanhassen MN 332 AM CST Sun Jan 3 2021 MNZ052-053-060>063-067>070-075>078-082>085-091>093-031600- /O.CON.KMPX.FG.Y.0002.000000T0000Z-210103T1600Z/ Isanti-Chisago-Hennepin-Anoka-Ramsey-Washington-Sibley-Carver- Scott-Dakota-Nicollet-Le Sueur-Rice-Goodhue-Watonwan-Blue Earth- Waseca-Steele-Martin-Faribault-Freeborn- Including the cities of Cambridge, Center City, Minneapolis, Blaine, St Paul, Stillwater, Gaylord, Chanhassen, Chaska, Victoria, Shakopee, Hastings, St Peter, Le Sueur, Faribault, Red Wing, St James, Mankato, Waseca, Owatonna, Fairmont, Blue Earth, and Albert Lea 332 AM CST Sun Jan 3 2021 ...DENSE FOG ADVISORY REMAINS IN EFFECT UNTIL 10 AM CST THIS MORNING... * WHAT...Visibility one quarter mile or less in dense fog. * WHERE...Portions of central, east central, south central and southeast Minnesota. * WHEN...From around sunrise until 10 AM CST this morning. * IMPACTS...Hazardous driving conditions due to low visibility. * ADDITIONAL DETAILS...Slick spots on roads, overpasses, and sidewalks are also possible as the fog freezes on exposed surfaces. PRECAUTIONARY/PREPAREDNESS ACTIONS... If driving, slow down, use your headlights, and leave plenty of distance ahead of you. && $$ WIZ014>016-023>028-031600- /O.CON.KMPX.FG.Y.0002.000000T0000Z-210103T1600Z/ Polk-Barron-Rusk-St. Croix-Pierce-Dunn-Pepin-Chippewa-Eau Claire- Including the cities of Osceola, Rice Lake, Ladysmith, Hudson, River Falls, Menomonie, Durand, Chippewa Falls, and Eau Claire 332 AM CST Sun Jan 3 2021 ...DENSE FOG ADVISORY REMAINS IN EFFECT UNTIL 10 AM CST THIS MORNING... * WHAT...Visibility one quarter mile or less in dense fog. * WHERE...Rusk, Barron, Polk, St. Croix, Pepin, Chippewa, Pierce, Dunn and Eau Claire Counties. * WHEN...Until 10 AM CST this morning. * IMPACTS...Hazardous driving conditions due to low visibility. * ADDITIONAL DETAILS...Slick spots on roads, overpasses, and sidewalks are also possible as the fog freezes on exposed surfaces. PRECAUTIONARY/PREPAREDNESS ACTIONS... If driving, slow down, use your headlights, and leave plenty of distance ahead of you. && $$ Borghoff
251 WWUS73 KMPX 031144 NPWMPX URGENT - WEATHER MESSAGE National Weather Service Twin Cities/Chanhassen MN 544 AM CST Sun Jan 3 2021 MNZ052-053-060>063-067>070-075>078-084-085-093-WIZ014-023-024- 031245- /O.CAN.KMPX.FG.Y.0002.000000T0000Z-210103T1600Z/ Isanti-Chisago-Hennepin-Anoka-Ramsey-Washington-Sibley-Carver- Scott-Dakota-Nicollet-Le Sueur-Rice-Goodhue-Waseca-Steele- Freeborn-Polk-St. Croix-Pierce- Including the cities of Cambridge, Center City, Minneapolis, Blaine, St Paul, Stillwater, Gaylord, Chanhassen, Chaska, Victoria, Shakopee, Hastings, St Peter, Le Sueur, Faribault, Red Wing, Waseca, Owatonna, Albert Lea, Osceola, Hudson, and River Falls 544 AM CST Sun Jan 3 2021 ...DENSE FOG ADVISORY IS CANCELLED... $$ MNZ082-083-091-092-031600- /O.CON.KMPX.FG.Y.0002.000000T0000Z-210103T1600Z/ Watonwan-Blue Earth-Martin-Faribault- Including the cities of St James, Mankato, Fairmont, and Blue Earth 544 AM CST Sun Jan 3 2021 ...DENSE FOG ADVISORY REMAINS IN EFFECT UNTIL 10 AM CST THIS MORNING... * WHAT...Dense fog may lift north from northern Iowa early this morning with visibility one quarter mile or less. * WHERE...Blue Earth, Watonwan, Martin and Faribault Counties. * WHEN...Until 10 AM CST this morning. * IMPACTS...Hazardous driving conditions due to low visibility. * ADDITIONAL DETAILS...Slick spots on roads, overpasses, and sidewalks are also possible as the fog freezes on exposed surfaces. PRECAUTIONARY/PREPAREDNESS ACTIONS... If driving, slow down, use your headlights, and leave plenty of distance ahead of you. && $$ WIZ015-016-025>028-031600- /O.CON.KMPX.FG.Y.0002.000000T0000Z-210103T1600Z/ Barron-Rusk-Dunn-Pepin-Chippewa-Eau Claire- Including the cities of Rice Lake, Ladysmith, Menomonie, Durand, Chippewa Falls, and Eau Claire 544 AM CST Sun Jan 3 2021 ...DENSE FOG ADVISORY REMAINS IN EFFECT UNTIL 10 AM CST THIS MORNING... * WHAT...Visibility one quarter mile or less in dense fog. * WHERE...Pepin, Rusk, Barron, Chippewa, Dunn and Eau Claire Counties. * WHEN...Until 10 AM CST this morning. * IMPACTS...Hazardous driving conditions due to low visibility. * ADDITIONAL DETAILS...Slick spots on roads, overpasses, and sidewalks are also possible as the fog freezes on exposed surfaces. PRECAUTIONARY/PREPAREDNESS ACTIONS... If driving, slow down, use your headlights, and leave plenty of distance ahead of you. && $$ Borghoff
609 WWUS73 KMPX 031548 NPWMPX URGENT - WEATHER MESSAGE National Weather Service Twin Cities/Chanhassen MN 948 AM CST Sun Jan 3 2021 WIZ015-016-025>028-031700- /O.CAN.KMPX.FG.Y.0002.000000T0000Z-210103T1600Z/ Barron-Rusk-Dunn-Pepin-Chippewa-Eau Claire- Including the cities of Rice Lake, Ladysmith, Menomonie, Durand, Chippewa Falls, and Eau Claire 948 AM CST Sun Jan 3 2021 ...DENSE FOG ADVISORY IS CANCELLED... Visibility has improved across western Wisconsin. $$ MNZ082-083-091-092-031800- /O.EXT.KMPX.FG.Y.0002.000000T0000Z-210103T1800Z/ Watonwan-Blue Earth-Martin-Faribault- Including the cities of St James, Mankato, Fairmont, and Blue Earth 948 AM CST Sun Jan 3 2021 ...DENSE FOG ADVISORY NOW IN EFFECT UNTIL NOON CST TODAY... * WHAT...Dense fog will continue across southern Minnesota with visibility one quarter mile or less in places. * WHERE...Blue Earth, Watonwan, Martin and Faribault Counties. * WHEN...Until noon CST today. * IMPACTS...Hazardous driving conditions due to low visibility. This included part of I-90 in south central Minnesota. * ADDITIONAL DETAILS...Slick spots on roads, overpasses, and sidewalks are also possible as the fog freezes on exposed surfaces. PRECAUTIONARY/PREPAREDNESS ACTIONS... If driving, slow down, use your headlights, and leave plenty of distance ahead of you. && $$ jrb
264 WWUS73 KMPX 031801 NPWMPX URGENT - WEATHER MESSAGE National Weather Service Twin Cities/Chanhassen MN 1201 PM CST Sun Jan 3 2021 MNZ082-083-091-092-031915- /O.EXP.KMPX.FG.Y.0002.000000T0000Z-210103T1800Z/ Watonwan-Blue Earth-Martin-Faribault- Including the cities of St James, Mankato, Fairmont, and Blue Earth 1201 PM CST Sun Jan 3 2021 ...DENSE FOG ADVISORY HAS EXPIRED... Visibility has improved across the region but a few areas of dense fog are possible this afternoon, and it could redevelop overnight. $$ jrb
The office that day
Everything else NWS Twin Cities, MN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jan 1, 6:00 PM CST | Dense Fog Advisory | MPX | Anoka, Benton, Blue Earth, Brown, Carver, Chippewa and 35 more | 18 hr |
Nearby
Dense Fog Advisories in Minnesota, 2021Dense Fog Advisories in Wisconsin, 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.