Sentinel, North Dakota Weather Forecast Discussion

206
FXUS63 KBIS 302012
AFDBIS
Area Forecast Discussion
National Weather Service Bismarck ND
312 PM CDT Tue Sep 30 2025
.KEY MESSAGES...
- High temperatures around 10 to 20 degrees above average
  expected Wednesday and Thursday.
- Cooler temperatures return to end the week, with temperatures
  dipping below average to start the upcoming week.
- Rain chances return across the area to end the week and start
  the upcoming week.
&&
.DISCUSSION...
Issued at 244 PM CDT Tue Sep 30 2025
Current surface analysis places low along the
Alberta/Saskatchewan border stretching into central/eastern
Montana, while ridge stretches from Ontario into the Midwest.
Upper level analysis places ridge over the Midwest into western
Ontario, with deep low off the Pacific Northwest coast. Over
our area, south/southeasterly winds continue between the
aforementioned surface features, with some clouds noted mainly
over the James River Valley region.
For tonight, a few showers and maybe a rumble or two of thunder
will be possible over the James River Valley region as a modest
wave lifts through the area, but expect and activity to be weak
and isolated. Some additional showers possible late tonight over
the west as aforementioned surface low lifts northeasterly and
its affiliated trough passes over.
On Wednesday, with the exception of some lingering showers over
the west, quiet weather is expected with another very warm day
on tap as thermal ridge remains over the region. Highs remain
around 10 to 20 degrees above average.
The warm temperatures continue into Thursday along with dry
conditions. Changes start to come late Thursday into Friday as
aforementioned upper low off the Pacific Northwest moves onshore
and digs southerly as it opens up during its approach. This
will start bringing precipitation chances to the area, along
with some thunderstorms. Latest runs of the CSU Machine Learning
Probabilities indicate a low chance for severe mainly over
eastern portions of our area Friday into Saturday. Cooler air
will also start gradually working its way into our area.
Going into early next week, precipitation chances linger over
various parts of the area and temperatures drop below average
per latest NBM guidance.
&&
.AVIATION /18Z TAFS THROUGH 18Z WEDNESDAY/...
Issued at 112 PM CDT Tue Sep 30 2025
VFR conditions will prevail through the forecast period. LLWS
will be possible at the KBIS terminal along with over south
central North Dakota this evening and overnight.
&&
.BIS WATCHES/WARNINGS/ADVISORIES...
None.
&&
$$
DISCUSSION...JJS
AVIATION...JJS

NWS BIS Office Area Forecast Discussion