351
FXUS65 KBOU 170012
AFDBOU

Area Forecast Discussion
National Weather Service Denver/Boulder CO
612 PM MDT Thu Apr 16 2026

.KEY MESSAGES...

- Red Flag Warning continues due to critical fire weather
  conditions this afternoon and early evening for the southern
  and eastern forecast areas.

- Spring storm moves in overnight with snow of the forecast area
  and a much colder airmass.

- Hard freeze expected across the plains Friday night.

- Dry and warmer weather returns for early next week.

&&

.DISCUSSION /Through Thursday/...
Issued at 1243 PM MDT Thu Apr 16 2026

The rest of today will be warm and dry for all the forecast area.
The low humidities and gusty winds will keep the fire weather
conditions critical across the southern and eastern CWA into early
this evening. Temperatures are expected to reach the mid and
upper 70s across the plains for highs this afternoon.

Fairly dramatic changes to the weather are still on track starting
tonight.  Models are showing an upper trough to move eastward across
the state later tonight through Friday. A strong cold front will
move over the forecast area after midnight tonight with strong
northerly upslope winds behind it. Gusts up to 45 mph are possible
immediately behind the front.

Snow is expected for the forecast area, mostly on Friday, with
light snow lingering over the mountains into Friday night. The
best accumulations will be over the high mountains where up to 8
inches are possible through Friday night. The plains will see snow
too, but accumulations do not look significant. The latest model
runs now point to just 2 to 5 inches total over the foothills and
Palmer Ridge, and 1 or 2 inches, at best, over the western and
southern suburbs of greater Denver. The rest of the plains may see
an inch at best.

High temperatures will only reach the upper 30s to lower 40s across
the plains on Friday. With significant clearing expected Friday
night, readings will drop into the upper teens to mid 20s, so we
issued a Freeze Warning from 8 PM to 8 AM Saturday morning.

By Saturday, northwesterly flow aloft will push across the CWA,
then upper ridging moves in on Sunday. The airmass will warm a bit
on Saturday with highs in the 50s over the plains, then above
normal temperatures return on Sunday with highs in the 70s.

For the later days, Monday through Thursday of next week, upper
ridging is in place well into Wednesday with a dry airmass and
well above normal temperatures to continue.  By Thursday, models
are all over the place the next incoming upper trough, so confidence
is not very good just yet.

&&

.AVIATION /00Z TAFS through 00Z Saturday/...
Issued at 541 PM MDT Thu Apr 16 2026

VFR conditions expected through this evening before a cold front
brings lower ceilings and thus MFVR conditions overnight tonight.
Winds are currently gusting from the WSW, and will continue
through 02-03Z before lighter southwest winds prevail. However,
BJC will likely see a period of light southeast winds this evening (30%
chance of light southwest winds instead). A strong cold front will
bring gusty north/northeast winds by 06-08Z tonight, with gusts up
to 35 kts possible. Ceilings will lower to ~2000 ft by sunrise
tomorrow morning.

Behind the front, light to briefly moderate snowfall is expected
Friday morning through the afternoon. Best chance for moderate
snowfall will be between 15-19Z, under a snowband if it develops
over the airports. Expect snowfall to gradually end by around 20Z,
with light scattered snow showers possible between 20Z-00Z as well
as lifting of ceilings. Winds will consistently be from the
north/northeast, before transitioning to the northwest behind the
snowfall.


&&

.FIRE WEATHER...
Issued at 1233 PM MDT Thu Apr 16 2026

We will keep the Red Flag Warning going for the southern and
eastern CWA the rest of the this afternoon and early evening due
to the 8-15 percent humidity levels and the 30 mph wind gusts.

&&

.BOU WATCHES/WARNINGS/ADVISORIES...
Red Flag Warning until 9 PM MDT this evening for COZ214-216-241-
245>247-249.

Freeze Warning from 8 PM Friday to 8 AM MDT Saturday for
COZ038>051.

&&

$$

DISCUSSION...66
AVIATION...MAI
FIRE WEATHER...66

NWS BOU Office Area Forecast Discussion