Olathe, Colorado Weather Forecast Discussion

800
FXUS65 KGJT 182018
AFDGJT
Area Forecast Discussion
National Weather Service Grand Junction CO
218 PM MDT Thu Sep 18 2025
.KEY MESSAGES...
- Moisture increases tomorrow with a few showers and storms
  possible over the San Juans and southern valleys.
- Periodic shower and storm chances highlight the forecast this
  weekend with dry stretches in between rounds of
  precipitation.
- Unsettled weather continues into early next week.
&&
.SHORT TERM /THROUGH FRIDAY NIGHT/...
Issued at 213 PM MDT Thu Sep 18 2025
Satellite imagery early this afternoon shows mostly clear skies
over eastern Utah and western Colorado. Off to the west, a low
pressure system is spinning over southern California. Mid to
high level clouds will begin advecting into the Four Corners
region tonight, followed by strong moisture advection tomorrow
morning. Light showers are anticipated to develop along the
moisture transport gradient tomorrow morning before afternoon
convection kicks off over the southern mountains in the
afternoon.
The CAMs support isolated to scattered nocturnal showers
continuing into Friday night with subtle perturbations moving
through the mid- level flow. A thunderstorm or two cannot be
ruled out with sufficient synoptic forcing present.
&&
.LONG TERM /SATURDAY THROUGH WEDNESDAY/...
Issued at 213 PM MDT Thu Sep 18 2025
Moisture advection advances northward throughout the weekend
leading to periodic storm chances. Terrain-based afternoon
convection will be the main player, but with an unsettled flow
aloft, isolated showers and storms are possible throughout the
entire weekend. There will be dry periods as well with
seasonable temperatures.
Moisture is slow to move out on Monday allowing for one last
day of showers and storms, especially north of I-70. The models
have come into better agreement about this, but we will have to
see if this trend holds through the weekend.
A brief dry slot moves overhead on Tuesday, but the global
ensembles bring another push of modest moisture by midweek.
Previously, it had looked like the dry air would be around for a
few more days than we are seeing now. As a result, the high
temperature forecast has moderated for much of next week.
&&
.AVIATION /18Z TAFS THROUGH 18Z FRIDAY/...
Issued at 1106 AM MDT Thu Sep 18 2025
VFR conditions are forecast through the TAF period with light,
terrain-driven winds. Mid to high clouds will move into the Four
Corners region tonight, spreading northeastward across
southeast Utah and southwest Colorado Friday morning.
&&
.GJT WATCHES/WARNINGS/ADVISORIES...
CO...None.
UT...None.
&&
$$
SHORT TERM...KAA
LONG TERM...KAA
AVIATION...TGJT

NWS GJT Office Area Forecast Discussion