Grand Junction, Colorado 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

339
FXUS65 KGJT 160527
AFDGJT

Area Forecast Discussion
National Weather Service Grand Junction CO
1127 PM MDT Fri May 15 2026

.KEY MESSAGES...

- Hot, dry and windy conditions continue Saturday. Red Flag
  Warnings are in effect for portions of the area meeting
  criteria where the fuels are critical for today and Saturday.

- A deep trough dips into the Great Basin Sunday afternoon,
  bringing precipitation chances to northeast UT and northwest
  CO. Strong outflow gusts are possible near thunderstorms.

- Mountain snow returns Sunday night into Monday morning.

- Freezing temperatures are expected to impact portions of the
  region Monday and Tuesday night.

&&

.DISCUSSION...
Issued at 1041 PM MDT Fri May 15 2026

STRONG STORM WINDS TODAY:

Early Saturday, a trough will dig southwards through the western
CONUS and towards our CWA, prompting our next round of active
weather. There really isn`t much moisture with this system at the
surface, but moister mid-levels paired with ample heating due to
spotty cloud cover early Saturday will support short-lived
thunderstorms across the northern CWA. CAM`s are keying in on
inverted-V atmospheric profiles and steep low-level lapse rates,
which would support powerful downdrafts and outflow winds. As of
now, storm coverage is looking best within the Central Yampa River
Basin between 2PM Saturday through the early evening period. Even
so, outflows could travel as far as the I-70 corridor. Red flag
conditions are in place in these regions, and so fire weather
conditions could be exacerbated should outflow winds reach these
regions.

MOISTER SUNDAY AND MONDAY:

As the low sweeps through on Sunday and Monday, flow around the base
of the trough moistens, and wetter conditions move over the CWA.
Active weather will continue, but Sunday and Monday`s storms should
be better precipitation producers with surface conditions too moist
to continue Saturday`s wind threat. Temperatures will plummet within
the trough though, leaving Sunday`s highs near-normal and Monday`s
highs 10+ degrees below normal. This means another round of snowfall
for our higher elevation regions. Favored ranges will be the Uintas
and Park Range where temperatures will be the coldest. The NBM is
very optimistic in the likelihood of advisory-level snowfall along
the US-191 mountain corridor (>75% chance), but less optimistic on
that same threat manifesting through Rabbit Ears Pass (30-40%
chance). Other mountain passes across the CWA are expected to see
under 4" of snow with higher values confined to above pass level.

FREEZING TEMPERATURES:

Precipitation will hang up on the Divide Tuesday and Wednesday with
some afternoon showers left over in the northwest flow behind the
departing trough. The rest of the area should begin to dry out
Tuesday and Wednesday but below normal temperatures remain. Freezing
temperatures will likely impact portions of the CWA Tuesday and
Wednesday morning behind this cold front.

&&

.AVIATION /06Z TAFS THROUGH 06Z SUNDAY/...
Issued at 1127 PM MDT Fri May 15 2026

Mid to high level clouds will be passing through overnight with
high based showers/virga with minimal impacts. This moisture
however will lead to shower and thunderstorm development by
Saturday afternoon. The main concern will be strong outflow
winds in excess of 40 mph along and north of Interstate 70 into
the evening hours. Strong gradient winds of 25 to 35 mph are
also expected over eastern Utah ahead of the next approaching
system.


&&

.FIRE WEATHER...
Issued at 1041 PM MDT Fri May 15 2026

Moister conditions are developing as a low pressure system
approaches from the north. However, surface conditions will still
reach critical fire weather thresholds Saturday across west-central
Colorado and east-central Utah. This has prompted red flag warnings
Saturday from noon through 8PM.

For the most part, gusts will be westerly to southwesterly at 30-40
mph. However, with thunderstorms capable of producing strong
downdrafts north of I-70 (primarily within the Central Yampa River
Basin), erratic outflow winds in excess of 45 mph could travel long
distances and complicate surface conditions within these red flag
regions. As convection develops, it`ll be key to monitor the skies
for virga showers, where strong gusts will be the most likely.

&&

.GJT WATCHES/WARNINGS/ADVISORIES...

CO...Red Flag Warning from noon to 8 PM MDT Saturday for COZ203-205-
     290-292.
UT...Red Flag Warning from noon to 8 PM MDT Saturday for UTZ490.

&&

$$

DISCUSSION...TGJT
AVIATION...TGJT
FIRE WEATHER...TGJT