001 FXUS65 KFGZ 151035 AFDFGZArea Forecast Discussion National Weather Service Flagstaff AZ 335 AM MST Wed Oct 15 2025
.SYNOPSIS...Isolated showers across northwestern Arizona through this morning, then dry conditions prevail through the rest of the week. Cooler temperatures are expected through Friday, with a slight warmup over the weekend.
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.DISCUSSION...The closed low is located over the Great Basin early this morning, and will continue to move to the east through the day today. The gradient has relaxed enough that we shouldn`t see winds quite as strong as we did on Tuesday but expect it to still be a little breezy through this afternoon. There is still a little bit of moisture remaining across northwestern Arizona and the forcing from the approaching low continues to keep some showers going, mainly across far western Coconino county. With much cooler air filtering into the region, we can`t rule out a few snowflakes falling over the Kaibab Plateau through this morning but no accumulations are expected. Showers should finally come to an end by midday.
By late tonight, the low should be over Utah and the trough will be making its way through the region. By early Thursday morning, the low will be well off to our north but the trough may slow a bit as it moves through and doesn`t exit the area until Thursday afternoon. The flow turns more to the west-northwest for Thursday and will keep us nice and dry. A secondary trough pushes down late on Thursday and this trough will usher in and reinforce the colder air and this will be the start of our cold nights, especially across the higher terrain. The second trough should move through the region pretty quickly on Friday but that northwesterly flow will linger into early Saturday. Daytime highs will be 5-15 degrees below average through Friday but as we start to see a little ridging occur over the weekend, we should be able to bounce back and have temperatures closer to average.
The start of next week could be interesting as some long term models are hinting at another trough interacting with a Pacific low. Still too far out to have much confidence on the outcome but it is something to watch in the coming days.
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.AVIATION...Wednesday 15/12Z through Thursday 16/12Z...MVFR CIGS possible around the higher terrain through 15Z, otherwise VFR. ISO -SHRA possible N/W of a KIGM-KGCN-KPGA line before 20Z. Winds S/SW 10-20 kts with gusts 20-30 kts, becoming VRB 5-10 kts after 02Z. Locally gusty winds remaining downwind of the terrain overnight.
OUTLOOK...Thursday 16/12Z through Saturday 18/12Z...VFR conditions. Winds generally NW-NE 5-10 kts, locally gusty NE winds downwind of the terrain overnight.
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.FIRE WEATHER...Today and Thursday...Mainly dry and seasonably cool temperatures, outside of a slight chance for showers near the Kaibab Plateau through this afternoon. Winds south/southwest 10-20 mph today, becoming northwest through northeast 5-10 mph on Thursday. Minimum afternoon RH around 30-50%, falling to 20-30% on Thursday.
Friday through Sunday...Dry conditions with gradual warming. Winds north/northeast 5-10 mph Friday and Saturday, becoming south/southwest on Sunday. Minimum afternoon RH 20-30%.
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.FGZ WATCHES/WARNINGS/ADVISORIES...None.
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PUBLIC...Meola AVIATION...Humphreys FIRE WEATHER...Humphreys
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NWS FGZ Office Area Forecast Discussion