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Dense Fog Advisory 0021
Issued by the Sioux Falls Forecast Office

Action Issued Starts Expiration
New 2025-12-23 20:41:32 2025-12-23 20:40:00 2025-12-24 03:00:00
Area Extended 2025-12-23 21:19:02 2025-12-24 03:00:00
Continued 2025-12-23 21:19:02 2025-12-24 03:00:00
Time Extended 2025-12-24 02:11:39 2025-12-24 08:00:00
Cancelled 2025-12-24 02:11:39 2025-12-24 03:00:00
Cancelled 2025-12-24 05:32:06 2025-12-24 08:00:00


Action: New
Issued At: 2025-12-23 20:41:32

885 
WWUS73 KFSD 240240
NPWFSD

URGENT - WEATHER MESSAGE
National Weather Service Sioux Falls SD
840 PM CST Tue Dec 23 2025

MNZ080-081-089-090-240900-
/O.NEW.KFSD.FG.Y.0021.251224T0240Z-251224T0900Z/
Murray-Cottonwood-Nobles-Jackson-
Including the cities of Jackson, Fulda, Slayton, Lakefield,
Mountain Lake, Windom, and Worthington
840 PM CST Tue Dec 23 2025

...DENSE FOG ADVISORY IN EFFECT UNTIL 3 AM CST WEDNESDAY...

* WHAT...Visibility one quarter mile or less in dense fog.

* WHERE...Cottonwood, Jackson, Murray, and Nobles Counties.

* WHEN...Until 3 AM CST Wednesday.

* IMPACTS...Low visibility could make driving conditions hazardous.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If driving, slow down, use your headlights, and leave plenty of 
distance ahead of you.

&&

$$

IG


Action: Area Extended
Issued At: 2025-12-23 21:19:02

943 
WWUS73 KFSD 240318
NPWFSD

URGENT - WEATHER MESSAGE
National Weather Service Sioux Falls SD
918 PM CST Tue Dec 23 2025

IAZ003-240900-
/O.EXA.KFSD.FG.Y.0021.000000T0000Z-251224T0900Z/
Dickinson-
Including the cities of Arnolds Park, Spirit Lake, and Milford
918 PM CST Tue Dec 23 2025

...DENSE FOG ADVISORY IN EFFECT UNTIL 3 AM CST WEDNESDAY...

* WHAT...Visibility one quarter to one half mile in dense fog.

* WHERE...Dickinson County.

* WHEN...Until 3 AM CST Wednesday.

* IMPACTS...Low visibility could make driving conditions hazardous.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If driving, slow down, use your headlights, and leave plenty of 
distance ahead of you.

&&

$$

MNZ080-081-089-090-240900-
/O.CON.KFSD.FG.Y.0021.000000T0000Z-251224T0900Z/
Murray-Cottonwood-Nobles-Jackson-
Including the cities of Jackson, Fulda, Slayton, Lakefield,
Mountain Lake, Windom, and Worthington
918 PM CST Tue Dec 23 2025

...DENSE FOG ADVISORY REMAINS IN EFFECT UNTIL 3 AM CST WEDNESDAY...

* WHAT...Visibility one quarter mile or less in dense fog.

* WHERE...Cottonwood, Jackson, Murray, and Nobles Counties.

* WHEN...Until 3 AM CST Wednesday.

* IMPACTS...Low visibility could make driving conditions hazardous.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If driving, slow down, use your headlights, and leave plenty of 
distance ahead of you.

&&

$$

IG


Action: Continued
Issued At: 2025-12-23 21:19:02

943 
WWUS73 KFSD 240318
NPWFSD

URGENT - WEATHER MESSAGE
National Weather Service Sioux Falls SD
918 PM CST Tue Dec 23 2025

IAZ003-240900-
/O.EXA.KFSD.FG.Y.0021.000000T0000Z-251224T0900Z/
Dickinson-
Including the cities of Arnolds Park, Spirit Lake, and Milford
918 PM CST Tue Dec 23 2025

...DENSE FOG ADVISORY IN EFFECT UNTIL 3 AM CST WEDNESDAY...

* WHAT...Visibility one quarter to one half mile in dense fog.

* WHERE...Dickinson County.

* WHEN...Until 3 AM CST Wednesday.

* IMPACTS...Low visibility could make driving conditions hazardous.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If driving, slow down, use your headlights, and leave plenty of 
distance ahead of you.

&&

$$

MNZ080-081-089-090-240900-
/O.CON.KFSD.FG.Y.0021.000000T0000Z-251224T0900Z/
Murray-Cottonwood-Nobles-Jackson-
Including the cities of Jackson, Fulda, Slayton, Lakefield,
Mountain Lake, Windom, and Worthington
918 PM CST Tue Dec 23 2025

...DENSE FOG ADVISORY REMAINS IN EFFECT UNTIL 3 AM CST WEDNESDAY...

* WHAT...Visibility one quarter mile or less in dense fog.

* WHERE...Cottonwood, Jackson, Murray, and Nobles Counties.

* WHEN...Until 3 AM CST Wednesday.

* IMPACTS...Low visibility could make driving conditions hazardous.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If driving, slow down, use your headlights, and leave plenty of 
distance ahead of you.

&&

$$

IG


Action: Time Extended
Issued At: 2025-12-24 02:11:39

352 
WWUS73 KFSD 240811
NPWFSD

URGENT - WEATHER MESSAGE
National Weather Service Sioux Falls SD
211 AM CST Wed Dec 24 2025

MNZ089-240915-
/O.CAN.KFSD.FG.Y.0021.000000T0000Z-251224T0900Z/
Nobles-
Including the cities of Worthington
211 AM CST Wed Dec 24 2025

...DENSE FOG ADVISORY IS CANCELLED...

Visibility has improved in Nobles County and the Dense Fog Advisory 
has been cancelled. Note that visibility remains as low as one 
quarter to one half mile to the north and east, from Dovray to 
Windom and Jackson. The Dense Fog Advisory has been extended in 
those locations through 8 AM CST.

$$

IAZ003-MNZ080-081-090-241400-
/O.EXT.KFSD.FG.Y.0021.000000T0000Z-251224T1400Z/
Dickinson-Murray-Cottonwood-Jackson-
Including the cities of Jackson, Windom, Lakefield, Milford,
Fulda, Mountain Lake, Arnolds Park, Spirit Lake, and Slayton
211 AM CST Wed Dec 24 2025

...DENSE FOG ADVISORY NOW IN EFFECT UNTIL 8 AM CST THIS MORNING...

* WHAT...Visibility one quarter to one half mile in dense fog.

* WHERE...In Iowa, Dickinson County. In Minnesota, Cottonwood, 
  Jackson, and Murray Counties.

* WHEN...Until 8 AM CST this morning.

* IMPACTS...Low visibility could make driving conditions hazardous.

* ADDITIONAL DETAILS...With temperatures below freezing, watch for 
  slick spots from frost developing on untreated roads.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If driving, slow down, use your headlights, and leave plenty of 
distance ahead of you.

&&

$$

JH


Action: Cancelled
Issued At: 2025-12-24 02:11:39

352 
WWUS73 KFSD 240811
NPWFSD

URGENT - WEATHER MESSAGE
National Weather Service Sioux Falls SD
211 AM CST Wed Dec 24 2025

MNZ089-240915-
/O.CAN.KFSD.FG.Y.0021.000000T0000Z-251224T0900Z/
Nobles-
Including the cities of Worthington
211 AM CST Wed Dec 24 2025

...DENSE FOG ADVISORY IS CANCELLED...

Visibility has improved in Nobles County and the Dense Fog Advisory 
has been cancelled. Note that visibility remains as low as one 
quarter to one half mile to the north and east, from Dovray to 
Windom and Jackson. The Dense Fog Advisory has been extended in 
those locations through 8 AM CST.

$$

IAZ003-MNZ080-081-090-241400-
/O.EXT.KFSD.FG.Y.0021.000000T0000Z-251224T1400Z/
Dickinson-Murray-Cottonwood-Jackson-
Including the cities of Jackson, Windom, Lakefield, Milford,
Fulda, Mountain Lake, Arnolds Park, Spirit Lake, and Slayton
211 AM CST Wed Dec 24 2025

...DENSE FOG ADVISORY NOW IN EFFECT UNTIL 8 AM CST THIS MORNING...

* WHAT...Visibility one quarter to one half mile in dense fog.

* WHERE...In Iowa, Dickinson County. In Minnesota, Cottonwood, 
  Jackson, and Murray Counties.

* WHEN...Until 8 AM CST this morning.

* IMPACTS...Low visibility could make driving conditions hazardous.

* ADDITIONAL DETAILS...With temperatures below freezing, watch for 
  slick spots from frost developing on untreated roads.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If driving, slow down, use your headlights, and leave plenty of 
distance ahead of you.

&&

$$

JH


Action: Cancelled
Issued At: 2025-12-24 05:32:06

208 
WWUS73 KFSD 241131
NPWFSD

URGENT - WEATHER MESSAGE
National Weather Service Sioux Falls SD
531 AM CST Wed Dec 24 2025

IAZ003-MNZ080-081-090-241245-
/O.CAN.KFSD.FG.Y.0021.000000T0000Z-251224T1400Z/
Dickinson-Murray-Cottonwood-Jackson-
Including the cities of Jackson, Windom, Lakefield, Milford,
Fulda, Mountain Lake, Arnolds Park, Spirit Lake, and Slayton
531 AM CST Wed Dec 24 2025

...DENSE FOG ADVISORY IS CANCELLED...

Visibility has improved across the area and dense fog is no longer 
expected. Continue to watch for scattered slippery spots which may 
have developed during the dense fog earlier this morning.

$$

JH



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