National Weather Service Forecast Discussion

Thornton Weather Forecast   
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710
FXUS65 KBOU 041736
AFDBOU

Area Forecast Discussion
National Weather Service Denver/Boulder CO
1036 AM MST Wed Feb 4 2026

.KEY MESSAGES...

- Slightly above normal temperatures today with well above normal
  temperatures Thursday through Monday.

- Pattern change likely next week which will lead to more normal
  temperatures and multiple chances of precipitation.

&&

.DISCUSSION /Through Tuesday/...
Issued at 1015 PM MST Tue Feb 3 2026

A shortwave trough is moving across northeast Colorado this
evening providing weak QG ascent. At the surface, somewhat moist
northerly flow is aiding in create scattered snow showers. The
Palmer Divide will see the majority of the snow showers that fall across
the plains tonight as the northerly flow is upslope flow there
while it is downslope for the South Platte River Valley. Eastern
Douglas and western Elbert Counties could receive up to an inch of
snow before the snow dissipates around midnight to 2AM. In the
mountains, the north-northwest flow has allowed some snow showers
to continue this evening. The northwest slopes of the Front Range
mountains could receive another inch before snow showers end
around 2-4AM.

The shortwave trough departs the area early Wednesday morning
leaving QG descent behind it. Dry air will move in and Wednesday
will be mostly sunny with slightly above normal temperatures.

A strong and broad ridge will move over the Intermountain West on
Thursday. This ridge has 500 mb heights over the Pacific
Northwest that are 2.5 sigma above normal. This strong ridge will
lead to a long period of dry and mild weather for our forecast
area. The plains will see highs in the 60s Thursday through
Monday. The only concern during this period will be elevated fire
weather conditions near the Cheyenne Ridge on Saturday and Monday
due to the mild, dry, and somewhat breezy conditions. Highlights
are not expected at this time but if the wind forecast increases
with gusts up to 35 mph, highlights could be needed.

There is still optimism for a pattern change beginning around
Tuesday or Wednesday of next week. This pattern change would usher
in a more zonal and progressive upper level pattern with multiple
shortwaves passing through Colorado. Global ensemble data
indicates the mountains of Colorado are likely to see multiple
snow events. Ensembles are less confident in precipitation
occurring over the plains.

&&

.AVIATION /18Z TAFS through 18Z Thursday/...
Issued at 1035 AM MST Wed Feb 4 2026

Pretty weak normal diurnal wind patterns are expected at DIA for
the rest of today and all of tonight. There will be no ceiling
issues at the big airport.

&&

.BOU WATCHES/WARNINGS/ADVISORIES...
None.

&&

$$

DISCUSSION...Danielson
AVIATION...66

NWS BOU Office Area Forecast Discussion