999
FXUS65 KGJT 211114
AFDGJT

Area Forecast Discussion
National Weather Service Grand Junction CO
514 AM MDT Mon Sep 21 2026

.KEY MESSAGES...

- Mostly dry conditions and seasonable temps on tap for Monday.

- Wetter weather returns to the region by Tuesday, with showers
  and storms possible each day through the end of the work week.

&&

.DISCUSSION...
Issued at 1001 PM MDT Sun Sep 20 2026

DRIER THROUGH MONDAY:

A rather pleasant start to the work week with seasonable
temperatures and dry conditions on tap for Monday. This is mainly
due to a building high pressure system over the Great Basin.


PRECIPITATION CHANCES RETURN TUESDAY ONWARD:

By Tuesday, a low pressure system begins trucking its way across the
Great Basin and Intermountain West. While this is occurring, a high
pressure system will begin to set itself up over Texas. Both of
these factors combined will act to draw Gulf moisture into the
Desert Southwest. As a result, precipitation chances return to the
forecast just in time for the first day of fall. PWATs appear to be
180-200% of normal for a good chunk of the CWA, with the highest
values forecast to be south of I-70. This moisture stays in the area
for a majority of the week. Therefore, precipitation chances will
remain in the forecast for the foreseeable future, especially over
the southern mountains. Coverage of showers and storms ebbs and
flows each day, with some days seeing more widespread chances than
others. As more HiRes guidance becomes available, we will have a
better understanding of timing and coverage of precipitation
each day.

&&

.AVIATION /12Z TAFS THROUGH 12Z TUESDAY/...
Issued at 513 AM MDT Mon Sep 21 2026

Winds are expected to be light and terrain-driven throughout the
TAF period. Some mid-level cumulus will move into the region
throughout the afternoon, but cigs will remains about ILS
breakpoints and VFR conditions will persist.

&&

.GJT WATCHES/WARNINGS/ADVISORIES...

CO...None.
UT...None.

&&

$$

DISCUSSION...BS
AVIATION...TGJT