486
FXUS65 KGJT 021140
AFDGJT

Area Forecast Discussion
National Weather Service Grand Junction CO
540 AM MDT Sat Aug 2 2025

.KEY MESSAGES...

- Red Flag Warnings remain in effect for much of eastern Utah
  and western Colorado as widespread critical fire weather
  conditions setup.

- Isolated to scattered showers and storms will favor the
  central mountains and areas north today.

- Some smoke and haze from wildfires will remain visible today
  but should diminish tomorrow.

&&

.SHORT TERM /THROUGH SUNDAY/...
Issued at 317 AM MDT Sat Aug 2 2025

Another little wave is moving over central western Colorado at
the moment, with plenty of lightning accompanying this line. If
you heard thunder in the Grand Valley this morning, you weren`t
imagining it. For the remainder of today, isolated to scattered
showers and storms will fire this afternoon but will favor the
central mountains and areas north. Like we`ve seen recently,
some gusty winds of around 45 mph will be possible along with
some small hail and brief heavy downpours. Most critical fire
weather conditions will occur for the next several days amid a
drying pattern. Critical fire weather conditions become more
widespread today as humidities drop and gusts increase to over
30 mph in some locations. Thus, the Red Flag Warnings along the
CO/UT border remain in effect. Scattered showers are expected
again this afternoon and evening, the convection will fire off
the higher terrain. Outside of convection, deeper mixing will
bring widespread gusty surface winds of 20 to 30 mph to the
surface today, mainly for eastern Utah and far western Colorado.
With dry conditions in place, Red Flag Warnings remain in place
as described below.

Sunday, high pressure remains over southern Arizona as a ridge
axis sets up over the CWA. While RH values drop into the single
digits/low teens for many areas, light winds will keep critical
fire weather conditions to a minimum. High temperatures will
remain several degrees above more normal early August values.

&&

.LONG TERM /SUNDAY NIGHT THROUGH FRIDAY/...
Issued at 317 AM MDT Sat Aug 2 2025

A period of hot, dry, and windy conditions is expected through at
least midweek. High pressure centered to our south will allow
southwesterly flow to keep a dry airmass in place through at least
Tuesday night. PWAT anomalies will be well below normal during this
period, getting as low as 25-50% of normal Monday afternoon. As
such, PoPs are near zero until Wednesday afternoon. PWATs remain
below normal, but increase a bit Wednesday onwards as the high
pressure center moves eastward, allowing for some moisture to be
drawn into the region. This should support terrain based afternoon
convection towards the end of the long term. However, considering
how dry it will be leading up to Wednesday, and how little moisture
will be present, dry thunderstorms seem possible given the current
atmospheric moisture outlook.

Localized to widespread critical fire weather conditions will remain
a concern through the long term period. The jet will be overhead
through at least midweek, allowing for mixing down of strong winds.
This, coupled with below threshold relative humidity values (single
digits for many areas), creates the expected critical fire weather
conditions. In addition to being dry and windy, it also looks to be
hot as high temperatures will run 5 to 10 degrees above normal.

&&

.AVIATION /12Z TAFS THROUGH 12Z SUNDAY/...
Issued at 528 AM MDT Sat Aug 2 2025

One more day of convection is expected though coverage should be
less than what we`ve seen recently. Even so, KASE, KEGE, KHDN
and KGUC may see some convection so included PROB30 for those
sites. Also, some gusty winds of 20 to 30 mph are expected
across much of the area this afternoon as deeper mixing taps
into some stronger winds aloft. VFR conditions should remain in
place.

&&

.FIRE WEATHER...
Issued at 317 AM MDT Sat Aug 2 2025

Critical fire weather conditions will occur for the next
several days amid a drying pattern. Critical fire weather
conditions become more widespread today as humidities drop and
gusts increase to over 30 mph in some locations. Thus, the Red
Flag Warnings along the CO/UT border remain in effect.
Scattered showers expected again this afternoon and evening
which could bring wetting rain to some ongoing fires, though
frequent lightning will pose a threat of new ignitions.

&&

.GJT WATCHES/WARNINGS/ADVISORIES...

CO...Red Flag Warning from 1 PM this afternoon to 7 PM MDT this
     evening for COZ200-202-203-207-290.
UT...Red Flag Warning from 1 PM this afternoon to 7 PM MDT this
     evening for UTZ487-490-491.

&&

$$

SHORT TERM...TGR
LONG TERM...GF
AVIATION...TGJT
FIRE WEATHER...TGJT