Thorne, North Dakota Weather Forecast Discussion

245
FXUS63 KBIS 280826
AFDBIS
Area Forecast Discussion
National Weather Service Bismarck ND
326 AM CDT Sun Sep 28 2025
.KEY MESSAGES...
- Above average temperatures and occasionally breezy conditions
  continue through the middle of this week.
- Mostly dry conditions continue through the middle of this
  week. Low chances for rain return at the end of the week.
&&
.DISCUSSION...
Issued at 326 AM CDT Sun Sep 28 2025
An extended period of quiet, warm weather continues with mostly
sunny skies and dry conditions on tap for today. Highs are
expected to reach the 80s across most of the state, with the
warmest temperatures in the southwest as an east CONUS upper
high advects warmer air over the Western Plains. Through
Wednesday, this upper high will gradually amplify into a ridge
centered over the Great Lakes Region allowing warmer
temperatures aloft to persist over the Northern Plains. As such,
and combined with frequent southerly flow at the surface, highs
are forecast to reach the 80s across the state most days this
week through Thursday. Still, some upper 70 degree readings are
possible at times, especially near the Canadian border on
Monday.
For the most part, this pattern will maintain mostly dry
conditions through Thursday night. However, multiple weak
shortwaves may ride the western periphery of the ridge during
the workweek. As a result, the NBM continues to produce very
low, mostly non-mentionable PoPs over the forecast area. Still,
wouldn`t be surprised if a few showers, possibly with a few
rumbles of thunder, occur at some point.
Towards the end of the week, a major change in the weather pattern
is favored as models consistently suggest a trough will dig
into the western CONUS and break down the aforementioned ridge.
As this happens, rain chances will return to the area.
Where/when exactly, how much potential precipitation, and
duration of potential precipitation all remain open questions.
What maintains a higher probability, however, is a return to
seasonable temperatures that have the potential to become below
average by the end of the next weekend.
&&
.AVIATION /06Z TAFS THROUGH 06Z MONDAY/...
Issued at 1227 AM CDT Sun Sep 28 2025
VFR ceilings and visibility are expected through the period.
&&
.BIS WATCHES/WARNINGS/ADVISORIES...
None.
&&
$$
DISCUSSION...Telken
AVIATION...Telken

NWS BIS Office Area Forecast Discussion