Marmarth, North Dakota Weather Forecast Discussion

547
FXUS63 KBIS 212311
AFDBIS
Area Forecast Discussion
National Weather Service Bismarck ND
611 PM CDT Sun Sep 21 2025
.KEY MESSAGES...
- Patchy fog late tonight into Monday morning.
- Above average temperatures through the week.
- Dry conditions through the week.
&&
.UPDATE...
Issued at 610 PM CDT Sun Sep 21 2025
Quiet weather this evening, so limited adjustments are needed.
We are still expecting fog to form again overnight.
&&
.DISCUSSION...
Issued at 207 PM CDT Sun Sep 21 2025
Current surface analysis places low along the
Saskatchewan/Alberta border with trough dropping down into
central/eastern Montana. Upper level analysis places ridge
stretching from the Four Corners region northward into eastern
Montana, while a compact low spins over northern Minnesota.
Over our area, quiet weather continues with a modest southerly
wind ahead of the aforementioned trough. Skies are mostly
clear, but some afternoon fair weather cumulus have developed
over eastern parts of our area in the modest cyclonic flow on
the backside of the aforementioned upper low.
Quiet weather is expected tonight, but winds will start to shift
towards the northwest very late tonight as the aforementioned
surface trough pushes east. Ahead of this, winds will be quite
light with clear skies and ample low level moisture so expect
patchy fog to once again be a possibility, lingering into
Monday morning.
On Monday, trough meanders east before stalling out over
central North Dakota. Winds will become northwest behind this
feature, possibly becoming a bit breezy over the far west.
Otherwise, a quiet day is on tap with skies remaining mainly
clear.
Through the remainder of the week, we end up in perpetually dry
pattern with temperatures continuing to be above average, mainly
in the 70s to lower 80s, with NBM continuing to show high
confidence in the temperature forecast.
&&
.AVIATION /00Z TAFS THROUGH 00Z MONDAY/...
Issued at 610 PM CDT Sun Sep 21 2025
VFR CIGs until patchy fog develops tonight. Confidence remains
low for the locations. So for now we left mention out of the
TAFs. Light and variable winds through the period.
&&
.BIS WATCHES/WARNINGS/ADVISORIES...
None.
&&
$$
UPDATE...
DISCUSSION...JJS
AVIATION...JJS

NWS BIS Office Area Forecast Discussion