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Dense Fog Advisory 0012
Issued by the Bismarck Forecast Office

Action Issued Starts Expiration
New 2026-05-23 01:58:49 2026-05-23 01:58:00 2026-05-23 10:00:00
Continued 2026-05-23 03:48:04 2026-05-23 10:00:00
Area Extended 2026-05-23 03:48:04 2026-05-23 10:00:00
Continued 2026-05-23 05:38:07 2026-05-23 10:00:00
Area Extended 2026-05-23 05:38:07 2026-05-23 10:00:00
Continued 2026-05-23 06:43:08 2026-05-23 10:00:00
Cancelled 2026-05-23 08:19:41 2026-05-23 10:00:00
Continued 2026-05-23 08:19:41 2026-05-23 10:00:00
Expired 2026-05-23 09:51:17 2026-05-23 10:00:00


Action: New
Issued At: 2026-05-23 01:58:49

239 
WWUS73 KBIS 230658
NPWBIS

URGENT - WEATHER MESSAGE
National Weather Service Bismarck ND
158 AM CDT Sat May 23 2026

NDZ002-009-010-017-018-032-033-040>042-044-055-059-231500-
/O.NEW.KBIS.FG.Y.0012.260523T0658Z-260523T1500Z/
Burke-Williams-Mountrail-McKenzie-Dunn-Billings-Stark-Slope-
Hettinger-Grant-Adams-Northwest Ward-Western Morton-
Including the cities of Stanley, New England, Elgin, Carson,
Dickinson, Hebron, Watford City, Portal, Parshall, Killdeer, Medora,
Mott, New Town, New Salem, Lignite, New Leipzig, Marmarth, Powers
Lake, Glen Ullin, Williston, Halliday, Bowbells, Columbus, Hettinger,
and Kenmare
158 AM CDT Sat May 23 2026 /1258 AM MDT Sat May 23 2026/

...DENSE FOG ADVISORY IN EFFECT UNTIL 10 AM CDT /9 AM MDT/ THIS
MORNING...

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

* WHERE...Much of western North Dakota.

* WHEN...Until 10 AM CDT /9 AM MDT/ this morning.

* 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.

&&

$$

Hollan


Action: Continued
Issued At: 2026-05-23 03:48:04

367 
WWUS73 KBIS 230847
NPWBIS

URGENT - WEATHER MESSAGE
National Weather Service Bismarck ND
347 AM CDT Sat May 23 2026

NDZ001-019-020-057-231500-
/O.EXA.KBIS.FG.Y.0012.000000T0000Z-260523T1500Z/
Divide-Mercer-Oliver-Western McLean-
Including the cities of Center, Beulah, Hazen, Garrison, and Crosby
347 AM CDT Sat May 23 2026 /247 AM MDT Sat May 23 2026/

...DENSE FOG ADVISORY IN EFFECT UNTIL 10 AM CDT /9 AM MDT/ THIS
MORNING...

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

* WHERE...Divide, Mercer, Oliver, and Western McLean Counties.

* WHEN...Until 10 AM CDT /9 AM MDT/ this morning.

* 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.

&&

$$

NDZ002-009-010-017-018-032-033-040>042-044-055-059-231500-
/O.CON.KBIS.FG.Y.0012.000000T0000Z-260523T1500Z/
Burke-Williams-Mountrail-McKenzie-Dunn-Billings-Stark-Slope-
Hettinger-Grant-Adams-Northwest Ward-Western Morton-
Including the cities of Stanley, New England, Elgin, Carson,
Dickinson, Hebron, Watford City, Portal, Parshall, Killdeer, Medora,
Mott, New Town, New Salem, Lignite, New Leipzig, Marmarth, Powers
Lake, Glen Ullin, Williston, Halliday, Bowbells, Columbus, Hettinger,
and Kenmare
347 AM CDT Sat May 23 2026 /247 AM MDT Sat May 23 2026/

...DENSE FOG ADVISORY REMAINS IN EFFECT UNTIL 10 AM CDT /9 AM MDT/
THIS MORNING...

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

* WHERE...Much of western North Dakota.

* WHEN...Until 10 AM CDT /9 AM MDT/ this morning.

* 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.

&&

$$

Hollan


Action: Area Extended
Issued At: 2026-05-23 03:48:04

367 
WWUS73 KBIS 230847
NPWBIS

URGENT - WEATHER MESSAGE
National Weather Service Bismarck ND
347 AM CDT Sat May 23 2026

NDZ001-019-020-057-231500-
/O.EXA.KBIS.FG.Y.0012.000000T0000Z-260523T1500Z/
Divide-Mercer-Oliver-Western McLean-
Including the cities of Center, Beulah, Hazen, Garrison, and Crosby
347 AM CDT Sat May 23 2026 /247 AM MDT Sat May 23 2026/

...DENSE FOG ADVISORY IN EFFECT UNTIL 10 AM CDT /9 AM MDT/ THIS
MORNING...

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

* WHERE...Divide, Mercer, Oliver, and Western McLean Counties.

* WHEN...Until 10 AM CDT /9 AM MDT/ this morning.

* 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.

&&

$$

NDZ002-009-010-017-018-032-033-040>042-044-055-059-231500-
/O.CON.KBIS.FG.Y.0012.000000T0000Z-260523T1500Z/
Burke-Williams-Mountrail-McKenzie-Dunn-Billings-Stark-Slope-
Hettinger-Grant-Adams-Northwest Ward-Western Morton-
Including the cities of Stanley, New England, Elgin, Carson,
Dickinson, Hebron, Watford City, Portal, Parshall, Killdeer, Medora,
Mott, New Town, New Salem, Lignite, New Leipzig, Marmarth, Powers
Lake, Glen Ullin, Williston, Halliday, Bowbells, Columbus, Hettinger,
and Kenmare
347 AM CDT Sat May 23 2026 /247 AM MDT Sat May 23 2026/

...DENSE FOG ADVISORY REMAINS IN EFFECT UNTIL 10 AM CDT /9 AM MDT/
THIS MORNING...

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

* WHERE...Much of western North Dakota.

* WHEN...Until 10 AM CDT /9 AM MDT/ this morning.

* 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.

&&

$$

Hollan


Action: Continued
Issued At: 2026-05-23 05:38:07

343 
WWUS73 KBIS 231037
NPWBIS

URGENT - WEATHER MESSAGE
National Weather Service Bismarck ND
537 AM CDT Sat May 23 2026

NDZ060-231500-
/O.EXA.KBIS.FG.Y.0012.000000T0000Z-260523T1500Z/
Eastern Morton-
Including the cities of Mandan
537 AM CDT Sat May 23 2026

...DENSE FOG ADVISORY IN EFFECT UNTIL 10 AM CDT THIS MORNING...

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

* WHERE...Eastern Morton County.

* WHEN...Until 10 AM CDT this morning.

* 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.

&&

$$

NDZ001-002-009-010-017>020-032-033-040>042-044-055-057-059-231500-
/O.CON.KBIS.FG.Y.0012.000000T0000Z-260523T1500Z/
Divide-Burke-Williams-Mountrail-McKenzie-Dunn-Mercer-Oliver-Billings-
Stark-Slope-Hettinger-Grant-Adams-Northwest Ward-Western McLean-
Western Morton-
Including the cities of Hettinger, Williston, Powers Lake, Elgin,
Medora, New Salem, New Town, Stanley, Parshall, Center, Watford City,
Beulah, Dickinson, Carson, Glen Ullin, Halliday, New England,
Marmarth, Hazen, New Leipzig, Lignite, Killdeer, Garrison, Portal,
Crosby, Columbus, Kenmare, Bowbells, Hebron, and Mott
537 AM CDT Sat May 23 2026 /437 AM MDT Sat May 23 2026/

...DENSE FOG ADVISORY REMAINS IN EFFECT UNTIL 10 AM CDT /9 AM MDT/
THIS MORNING...

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

* WHERE...Much of western North Dakota.

* WHEN...Until 10 AM CDT /9 AM MDT/ this morning.

* 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.

&&

$$

Hollan


Action: Area Extended
Issued At: 2026-05-23 05:38:07

343 
WWUS73 KBIS 231037
NPWBIS

URGENT - WEATHER MESSAGE
National Weather Service Bismarck ND
537 AM CDT Sat May 23 2026

NDZ060-231500-
/O.EXA.KBIS.FG.Y.0012.000000T0000Z-260523T1500Z/
Eastern Morton-
Including the cities of Mandan
537 AM CDT Sat May 23 2026

...DENSE FOG ADVISORY IN EFFECT UNTIL 10 AM CDT THIS MORNING...

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

* WHERE...Eastern Morton County.

* WHEN...Until 10 AM CDT this morning.

* 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.

&&

$$

NDZ001-002-009-010-017>020-032-033-040>042-044-055-057-059-231500-
/O.CON.KBIS.FG.Y.0012.000000T0000Z-260523T1500Z/
Divide-Burke-Williams-Mountrail-McKenzie-Dunn-Mercer-Oliver-Billings-
Stark-Slope-Hettinger-Grant-Adams-Northwest Ward-Western McLean-
Western Morton-
Including the cities of Hettinger, Williston, Powers Lake, Elgin,
Medora, New Salem, New Town, Stanley, Parshall, Center, Watford City,
Beulah, Dickinson, Carson, Glen Ullin, Halliday, New England,
Marmarth, Hazen, New Leipzig, Lignite, Killdeer, Garrison, Portal,
Crosby, Columbus, Kenmare, Bowbells, Hebron, and Mott
537 AM CDT Sat May 23 2026 /437 AM MDT Sat May 23 2026/

...DENSE FOG ADVISORY REMAINS IN EFFECT UNTIL 10 AM CDT /9 AM MDT/
THIS MORNING...

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

* WHERE...Much of western North Dakota.

* WHEN...Until 10 AM CDT /9 AM MDT/ this morning.

* 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.

&&

$$

Hollan


Action: Continued
Issued At: 2026-05-23 06:43:08

909 
WWUS73 KBIS 231142
NPWBIS

URGENT - WEATHER MESSAGE
National Weather Service Bismarck ND
642 AM CDT Sat May 23 2026

NDZ001-002-009-010-017>020-032-033-040>042-044-055-057-059-060-
231500-
/O.CON.KBIS.FG.Y.0012.000000T0000Z-260523T1500Z/
Divide-Burke-Williams-Mountrail-McKenzie-Dunn-Mercer-Oliver-Billings-
Stark-Slope-Hettinger-Grant-Adams-Northwest Ward-Western McLean-
Western Morton-Eastern Morton-
Including the cities of Hettinger, Williston, Powers Lake, Elgin,
Medora, New Salem, New Town, Stanley, Parshall, Center, Watford City,
Beulah, Dickinson, Carson, Glen Ullin, Halliday, New England, Mandan,
Marmarth, Hazen, New Leipzig, Lignite, Killdeer, Garrison, Portal,
Crosby, Columbus, Kenmare, Bowbells, Hebron, and Mott
642 AM CDT Sat May 23 2026 /542 AM MDT Sat May 23 2026/

...DENSE FOG ADVISORY REMAINS IN EFFECT UNTIL 10 AM CDT /9 AM MDT/
THIS MORNING...

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

* WHERE...Much of western and parts of central North Dakota.

* WHEN...Until 10 AM CDT /9 AM MDT/ this morning.

* 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.

&&

$$

Hollan


Action: Cancelled
Issued At: 2026-05-23 08:19:41

440 
WWUS73 KBIS 231319
NPWBIS

URGENT - WEATHER MESSAGE
National Weather Service Bismarck ND
819 AM CDT Sat May 23 2026

NDZ032-040-231430-
/O.CAN.KBIS.FG.Y.0012.000000T0000Z-260523T1500Z/
Billings-Slope-
Including the cities of Medora and Marmarth
719 AM MDT Sat May 23 2026

...DENSE FOG ADVISORY IS CANCELLED...

Visibility has rapidly improved over the past few hours, and will
continue to do so through the morning. Thus, the Dense Fog Advisory
has been cancelled.

$$

NDZ001-002-009-010-017>020-033-041-042-044-055-057-059-060-231500-
/O.CON.KBIS.FG.Y.0012.000000T0000Z-260523T1500Z/
Divide-Burke-Williams-Mountrail-McKenzie-Dunn-Mercer-Oliver-Stark-
Hettinger-Grant-Adams-Northwest Ward-Western McLean-Western Morton-
Eastern Morton-
Including the cities of Hebron, Mott, Garrison, Stanley, Kenmare,
Watford City, Killdeer, Glen Ullin, Dickinson, Bowbells, Mandan,
Parshall, New Salem, Center, Portal, Hazen, Columbus, Williston,
Halliday, New Leipzig, New England, Powers Lake, Lignite, New Town,
Carson, Hettinger, Beulah, Elgin, and Crosby
819 AM CDT Sat May 23 2026 /719 AM MDT Sat May 23 2026/

...DENSE FOG ADVISORY REMAINS IN EFFECT UNTIL 10 AM CDT /9 AM MDT/
THIS MORNING...

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

* WHERE...Parts of western and central North Dakota.

* WHEN...Until 10 AM CDT /9 AM MDT/ this morning.

* 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.

&&

$$

Adam


Action: Continued
Issued At: 2026-05-23 08:19:41

440 
WWUS73 KBIS 231319
NPWBIS

URGENT - WEATHER MESSAGE
National Weather Service Bismarck ND
819 AM CDT Sat May 23 2026

NDZ032-040-231430-
/O.CAN.KBIS.FG.Y.0012.000000T0000Z-260523T1500Z/
Billings-Slope-
Including the cities of Medora and Marmarth
719 AM MDT Sat May 23 2026

...DENSE FOG ADVISORY IS CANCELLED...

Visibility has rapidly improved over the past few hours, and will
continue to do so through the morning. Thus, the Dense Fog Advisory
has been cancelled.

$$

NDZ001-002-009-010-017>020-033-041-042-044-055-057-059-060-231500-
/O.CON.KBIS.FG.Y.0012.000000T0000Z-260523T1500Z/
Divide-Burke-Williams-Mountrail-McKenzie-Dunn-Mercer-Oliver-Stark-
Hettinger-Grant-Adams-Northwest Ward-Western McLean-Western Morton-
Eastern Morton-
Including the cities of Hebron, Mott, Garrison, Stanley, Kenmare,
Watford City, Killdeer, Glen Ullin, Dickinson, Bowbells, Mandan,
Parshall, New Salem, Center, Portal, Hazen, Columbus, Williston,
Halliday, New Leipzig, New England, Powers Lake, Lignite, New Town,
Carson, Hettinger, Beulah, Elgin, and Crosby
819 AM CDT Sat May 23 2026 /719 AM MDT Sat May 23 2026/

...DENSE FOG ADVISORY REMAINS IN EFFECT UNTIL 10 AM CDT /9 AM MDT/
THIS MORNING...

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

* WHERE...Parts of western and central North Dakota.

* WHEN...Until 10 AM CDT /9 AM MDT/ this morning.

* 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.

&&

$$

Adam


Action: Expired
Issued At: 2026-05-23 09:51:17

690 
WWUS73 KBIS 231451
NPWBIS

URGENT - WEATHER MESSAGE
National Weather Service Bismarck ND
951 AM CDT Sat May 23 2026

NDZ001-002-009-010-017>020-033-041-042-044-055-057-059-060-231600-
/O.EXP.KBIS.FG.Y.0012.000000T0000Z-260523T1500Z/
Divide-Burke-Williams-Mountrail-McKenzie-Dunn-Mercer-Oliver-Stark-
Hettinger-Grant-Adams-Northwest Ward-Western McLean-Western Morton-
Eastern Morton-
Including the cities of Hebron, Mott, Garrison, Stanley, Kenmare,
Watford City, Killdeer, Glen Ullin, Dickinson, Bowbells, Mandan,
Parshall, New Salem, Center, Portal, Hazen, Columbus, Williston,
Halliday, New Leipzig, New England, Powers Lake, Lignite, New Town,
Carson, Hettinger, Beulah, Elgin, and Crosby
951 AM CDT Sat May 23 2026 /851 AM MDT Sat May 23 2026/

...DENSE FOG ADVISORY WILL EXPIRE AT 10 AM CDT /9 AM MDT/ THIS
MORNING...

Visibility has rapidly improved across much of the advisory area over
the past hour, and will continue to do so through the morning. Thus,
the Dense Fog Advisory will be allowed to expire on time.

$$

Adam



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