textproduct: Grand Junction

KEY MESSAGES

- Widespread Red Flag Warnings and Fire Weather Watches continue each day through Thursday. Critical fire weather conditions continue, tentatively into the weekend.

- Strong winds with gusts up to 50 mph today coupled with single digit relative humidities will make for especially hazardous critical fire weather conditions.

- Isolated mountain showers and thunderstorms possible near the Colorado-New Mexico border today. Dry thunderstorms will pose a risk of new fire starts.

DISCUSSION

Issued at 1207 PM MDT Tue Jun 9 2026

Today marks the expected height of this critical fire weather period as winds peak underneath a tightening pressure gradient ahead of a slow-moving trough. Morning cloud cover is bringing into question the extent of wind gusts today though with the majority of model guidance seeing a dip in gusts across the region as a result. It's still safe to expect a high-end Red Flag event today, but valley gusts are trending in a slightly weaker direction than previously anticipated (although "weaker" doesn't necessarily mean a lot considering just how strong the winds have been forecasted to be for days now). Generally, look for gusts to sit around 40-45 mph in valleys south of I-70 and 30-40 mph in valleys north of I-70 with the strongest winds occurring late in the afternoon when cloud cover begins to break. Stronger gusts up to 50 mph will still occur, but over more localized areas, mostly near any virga showers that develop. These winds (paired with the single digit relative humidities that will settle in across the CWA) will still support rapid wildfire growth, whether it be from the existing wildfires we saw develop yesterday or new ignitions.

Even though winds will reach their peak today, fire weather conditions will persist at least through Friday, and likely through the weekend as well. The upper-level trough broadens across the northern CONUS, pulling us into more zonal flow Wednesday. By Thursday, remarkably, the atmosphere will have become even drier with near-record low PWAT's forecasted by ensembles. Almost the entirety of the CWA could see relative humidities fall below 15% (with essentially all valleys expected to hit single digits) with only the highest elevations above pass level being the exception. Beyond Thursday, we will finally start to see a slow withdrawal from this prolonged fire weather pattern, but recovery will be slow due to the lack of a wet pattern shift, so there remains a high probability of additional fire weather highlights being needed as we cross over into the weekend.

AVIATION /18Z TAFS THROUGH 18Z WEDNESDAY/

Issued at 1147 AM MDT Tue Jun 9 2026

Scattered to broken mid and upper level clouds continue to stream across the West Slope this afternoon, thanks to a system working across the Intermountain West. A few showers develop with strong outflow gusts possible around them. Strong upper level winds will mix downward to the surface this afternoon as this disturbance works through the region. Wind gusts to around 50 mph are possible for many locales, with widespread 25-35 mph winds. Winds begin to subside this evening and return to light and variable after midnight at most locations.

FIRE WEATHER

Issued at 1207 PM MDT Tue Jun 9 2026

The critical fire weather pattern persists at least through Thursday, likely through the weekend, and possible into next work week. Today remains the most potent day for wildfires though as winds are expected to span anywhere from 30-40 mph in northern valleys, to 40-45 mph in southern valleys (including around yesterday's fire starts like the Bee Hive Fire), and localized 55 mph gusts, primarily near virga showers. Rapid wildfire spread will be possible today as a result. Winds begin to weaken beginning tomorrow, however drier conditions will be settling in with the driest air expected to be in place on Thursday when the majority of the region will sit at 5-15% minimum relative humidities.

One additional concern today is the threat of dry thunderstorms confined to the CO-NM border. We've already seen a handful of cloud- to-ground strikes around the southern San Juans, and with CAM's hinting at mild instability in that area this afternoon, we could continue to see more lightning in this region throughout the day. Minimal rainfall will reach the ground with these storms, and with critical fuels in these locations, any lightning strikes pose a threat of new fires starts.

GJT WATCHES/WARNINGS/ADVISORIES

CO...Red Flag Warning until 10 PM MDT this evening for COZ200-202- 203-205-207-290>295. Red Flag Warning from 10 AM to 10 PM MDT Wednesday for COZ200- 202-203-205-207-290>295. Wind Advisory until 8 PM MDT this evening for COZ002-007-008- 011-020>022. Fire Weather Watch from Thursday morning through Thursday evening for COZ201-205-207-291>295. UT...Red Flag Warning until 10 PM MDT this evening for UTZ486-487- 490-491. Red Flag Warning from 10 AM to 10 PM MDT Wednesday for UTZ486- 487-490-491. Wind Advisory until 8 PM MDT this evening for UTZ022.