textproduct: Grand Junction

KEY MESSAGES

- High pressure builds into the region and temperatures trend upward to about five degrees above normal over the coming days. - Quiet weather conditions return through the weekend.

- Models hint at the possibility of more tropical moisture bringing showers to the region early next week.

DISCUSSION

Issued at 1147 AM MDT Thu Oct 1 2026

With high pressure building in from the west, we'll see a pattern shift with much drier weather than we've had for the last few weeks. Here's the bottom line up front for the hay farmers and ranchers, now is probably the best time for the last hay cutting. Days are getting shorter, temperatures are getting cooler, and the Fall is not known for long dry spells. That being said, Daytime high temperatures look to run about five degrees above normal under mostly sunny skies with afternoon relative humidity running 25% in the lower valleys to 35% in the higher valleys and over the higher terrain. With the moisture in the ground, will likely see dew each morning. A disturbance early next week and a second later in the week bring chances for showers mostly to the southern mountains, but the higher valleys could see a slight chance for light showers up north along the I-70 corridor.

Now for the synoptic view, high pressure building in to the Four Corners area will pull monsoonal moisture north into the Great Basin through the weekend. With the residual moisture in the area, there is a slight chance for a shower or thunderstorms over the San Juans Sunday and Monday afternoon. Models are in good agreement with a shortwave system moving in off the Pacific Monday that will pick up the moisture in the Great Basin bringing 22-35% chances for showers and thunderstorms to the Colorado mountains Tuesday. Models are hinting that this pattern will repeat again next weekend with another shortwave moving in off the Pacific, but it is a long ways out and there is less agreement on the timing and track. FOr the most part, the weather looks to be pretty nice for the next week or so, so get out and enjoy it along with the Fall colors.

AVIATION /18Z TAFS THROUGH 18Z FRIDAY/

Issued at 1147 AM MDT Thu Oct 1 2026

Low clouds and fog may develop again overnight into tomorrow morning in mountain valley sites such as KDRO and KGUC but confidence is low. Otherwise, VFR conditions will prevail over the next 24 hours.

GJT WATCHES/WARNINGS/ADVISORIES

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