677
FXUS65 KBOU 011150
AFDBOU

Area Forecast Discussion
National Weather Service Denver/Boulder CO
550 AM MDT Mon Sep 1 2025

.KEY MESSAGES...

- Dense fog around Julesburg and Holyoke early this morning.

- Dry and slightly warmer for Labor Day.

- Tuesday through Thursday will see a chance of isolated storms.

- Better coverage of storms and above normal temperatures expected
  next weekend.

&&

.UPDATE...
Issued at 308 AM MDT Mon Sep 1 2025

An area of dense fog has crept into Sedgwick and Phillips counties
on light southeast winds. Within 20 miles further west, there is a
boundary with southwest winds and drier air behind it. The fog may
expand a bit more over the next couple of hours, but then it
should shift eastward as it dissipates by about 8 AM.

&&

.DISCUSSION /Through Sunday/...
Issued at 244 PM MDT Sun Aug 31 2025

It`s hard to beat this weather for Labor Day weekend. There will
be plenty of sunshine, light winds, and near normal temperatures
today and Labor Day. A ridge aloft over Colorado will keep
conditions dry although a few sprinkles could occur in the
southern foothills.

On Tuesday, high temperatures reach the mid 80s on the plains as
northwest flow increases aloft. Some weak instability will build
in over the higher terrain and a few isolated showers and storms
may develop.

A weak shortwave trough within the northwest flow will move close
to Colorado on Wednesday. Meanwhile, a surface cold front will
move across the northeast plains of Colorado. This will increase
moisture and forcing which will produce scattered storms mainly
over the higher terrain and the Palmer Divide.

Another very quick-moving trough will move across the Northern
Plains of the US on Thursday. Downslope winds may develop across
the plains which could quickly increase temperatures to the upper
80s across the plains. There will be a chance for late day showers
and storms as another cold front will move across the area in the
evening.

Friday appears to be the coolest day in the 7-day forecast with
highs in the 70s across the plains. Plenty of areas across the
plains will see lows in the 40s Friday night due to low humidity.
There will be more zonal flow next weekend with the possibility
that some Pacific moisture arrives. Near or slightly above normal
temperatures are expected with a chance of afternoon/evening
storms.

&&

.AVIATION /12Z TAFS through 12Z Tuesday/...
Issued at 549 AM MDT Mon Sep 1 2025

VFR through tonight. North to northeast winds at 10 to 20 knots
are expected between 18z and 02z.

&&

.BOU WATCHES/WARNINGS/ADVISORIES...
Dense Fog Advisory until 8 AM MDT this morning for COZ050-051.

&&

$$

UPDATE...Gimmestad
DISCUSSION...Danielson
AVIATION...Gimmestad