201
FXUS63 KBIS 110859
AFDBIS

Area Forecast Discussion
National Weather Service Bismarck ND
359 AM CDT Fri Jul 11 2025

.KEY MESSAGES...

- Scattered showers and thunderstorms are expected today. The
  threat for severe storms is very low.

- Breezy and cooler today with highs mainly in the 70s.

- Surface smoke central and east this morning. Smoke may again
  lead to reduced visibilities later today through tonight,
  especially west, and then clearing from west to east on
  Saturday.

- Otherwise dry this weekend with temperatures warming back
  into the 80s.

- A more active pattern returns for the start of next work
 week.

&&

.DISCUSSION...
Issued at 347 AM CDT Fri Jul 11 2025

Currently, showers and a few thunderstorms were situated over
western ND, behind a cold front that is dropping southeast
through the state. In addition, surface smoke directly behind
the front is reducing visibilities into the 2-5SM range. We
think this initial smoke behind the front will be transient in
nature this morning. Additional surface smoke could rear it`s
ugly head again later today and into Saturday. More on that
later.

The threat for severe storms looks to be low today as in
general, instability aloft directly behind the front, remains
ahead of the increasing shear that also increases during the
day. Various CAMS have from time to time have indicated some
stronger cells as they track across the forecast area. An
isolated local gust or some small hail certainly can`t be ruled
out, but by and large, expect non severe thunderstorms today.
Later this afternoon as the shear catches up with the
instability, stronger thunderstorms will be possible, but by
this time the activity would most likely develop just to the
south and east of the forecast area.

It will be noticeably cooler and breezy today behind the cold
front today, which typically would be a refreshing break from
the heat and humidity. Unfortunately it looks like smoke from
Canadian wildfires will be drawn down into the forecast area
later today through tonight, both aloft and at the surface. The
current reduced visibilities directly behind the surface cold
front are not expected to last more than a few hours at any one
location. It`s later today and tonight when we could possibly
see some significant reductions to visibility. Current model
forecast show that surface smoke would be most concentrated over
western ND tonight and into Saturday morning. It does look like
models clear the smoke from west to east pretty quickly on
Saturday. Highs on Saturday are forecast to be in the upper 70s
to mid 80s.

Sunday will see highs mainly in the 80s, with a few lower 90
readings possible in the south. Although we heat up on Sunday,
surface high pressure and upper level ridging should help to
inhibit convection.

A northwest upper level flow pattern that remains in place
through the weekend begins to transition into a zonal flow early
in the work week, to even a broad upper trough over central and
eastern Canada below a Hudson Bay low. This would at least
temporarily bring a cooldown to the region. The latest NBM
ensemble guidance for Bismarck shows a rather large temperature
spread on Monday with a significant cooldown through mid-week,
and although we see a cooldown, the ensemble temperature spread
remains high through the remainder of the week, so the extent of
the cooldown early to mid-week and eventual warm-up late in the
week remains uncertain. Current guidance at the other main
forecast sites are similar.

Monday does look to be a transition day and if we see another
day of warm temperatures and we do see a cold frontal passage,
perhaps we see a potential for some stronger thunderstorms.
Currently the CSU ML page keeps the severe threat to our south
on Monday. Nevertheless, we do see increasing NBM pops later in
the day Monday and continuing into mid-week.

&&

.AVIATION /06Z TAFS THROUGH 06Z SATURDAY/...
Issued at 1243 AM CDT Fri Jul 11 2025

A cold front currently through KXWA and KMOT will push through
KDIK shortly and then KBIS and KJMS during the overnight hours.
North to northwest flow expected behind the cdfnt through the
remainder of the period, breeze this afternoon with gust to
around 25kts. Smoke is expected directly behind the cdfrnt with
current vsbys mostly in the 3-5SM range across the north. After
the short period of smoke there should be a break until smoke
possibly returns towards the end of the TAF period. Band of
scattered showers and isolated thunderstorms is also expected to
sweep from northwest to southeast across the forecast area, with
the potential for a band of MVFR ceilings and MVFR vsbys in
shower activity. Conditions also improve from northwest to
southeast across the forecast area from late morning through the
afternoon.

&&

.BIS WATCHES/WARNINGS/ADVISORIES...
None.

&&

$$

DISCUSSION...TWH
AVIATION...TWH