812 FXUS65 KGJT 141145 AFDGJTArea Forecast Discussion National Weather Service Grand Junction CO 545 AM MDT Sun Sep 14 2025
.KEY MESSAGES...
- Much drier conditions will be in place today and Monday with isolated storms possible over the northern mountains.
- Isolated to scattered storms are possible over the higher terrain on Tuesday as a disturbance crosses the north.
- Temperatures through the week will oscillate between 5 degrees below and 5 degrees above normal.
- Moisture potentially returns late this week into the coming weekend but confidence is low at this time.
&&
.SHORT TERM /THROUGH MONDAY/... Issued at 336 AM MDT Sun Sep 14 2025
A much drier air mass is moving in behind the departing low pressure trough that brought several rounds of stormy weather with strong to severe storms over the last few days. Skies are clearing behind this trough as evident on satellite across eastern Utah into much of western Colorado. Some low clouds remain across the northern and central Divide as this low center spins over NE Colorado and the Nebraska Panhandle. These clouds should slowly clear by late morning and afternoon. Much of the area will see drier conditions today providing a break from the active weather with very low chances of precipitation. Some hi- res CAMs are indicating isolated showers or storms popping over the Uintas and northern Colorado mountains along the Divide this afternoon, so included a slight chance mention. However, chances of wetting rain are very low. Temperatures today will be cool today with highs about 5 degrees below normal. Mostly to partly sunny skies should prevail as well, so great day to get outside and enjoy the outdoors after the last few days of stormy conditions.
While the western slope will be under a drier westerly flow, a low pressure trough will move inland today across the Pacific Northwest and track through the Intermountain West on Monday. We will feel the influence of the jet across the north where afternoon winds could be breezy at times. Some moisture will also advect in across the north and while it isn`t as abundant as what we recently experienced, it still may be enough to generate some isolated showers across the north Monday afternoon. The rest of the CWA looks to remain dry on Monday. Temperatures also look to return to near normal.
&&
.LONG TERM /MONDAY NIGHT THROUGH SATURDAY/... Issued at 336 AM MDT Sun Sep 14 2025
The aforementioned trough over the Intermountain West on Monday will slowly pass over the Northern Rockies Monday night through Wednesday. Although moisture will be limited at this time (PWATs around 75-125% of normal), support from the trough passage may help increase PoPs. Elevated PoPs will primarily be along our northern border Monday night into Tuesday morning as this is where any PVA associated with the trough will be. However, the chances of precipitation transition to being along the higher terrain across the CWA on Tuesday and Wednesday afternoon. Ridging will build aloft on Thursday behind the trough passage, but as the ridge axis moves to our east, southwesterly flow may bring our next potential moisture push late in the week. Temperatures return to near normal on Monday, and will continue to oscillate above and below normal through the week.
&&
.AVIATION /12Z TAFS THROUGH 12Z MONDAY/... Issued at 541 AM MDT Sun Sep 14 2025
Some low stratus will linger through 15Z in some lower valley locations with BKN to OVC low clouds hanging around the northern and central Divide. This will bring some TAF sites to MVFR/IFR conditions due to low CIGS. Cannot rule out patchy fog in places. KRIL, KHDN, KASE and KGUC appear most impacted by this through the morning. CIGS should lift after 15Z with skies becoming partly to mostly sunny by afternoon. Breezy conditions will occur at times but overall, expect relatively light winds. Isolated storms may pop this afternoon over the high terrain with cumulus but otherwise, dry conditions will be the rule with VFR in place this afternoon and evening.
&&
.GJT WATCHES/WARNINGS/ADVISORIES...
CO...None. UT...None.
&&
$$
SHORT TERM...MDA LONG TERM...GF AVIATION...TGJT
NWS GJT Office Area Forecast Discussion