Weather Service Report


273 
FXUS65 KGJT 230530
AFDGJT

Area Forecast Discussion
National Weather Service Grand Junction CO
1130 PM MDT Wed Sep 22 2021

.SHORT TERM...(Tonight through Thursday night)
Issued at 221 PM MDT Wed Sep 22 2021

A ridge of high pressure continues to dominate the weather pattern
today with mostly sunny skies and warmer temperatures. The ridge 
of high pressure will move east of the Continental Divide by 
tonight as a Pacific storm system moves into the Great Basin. 
Expect milder temperatures tonight than previous nights due to 
the increasing high clouds and warm air advection. The elongated Pacific
trough will move across the forecast area Thursday afternoon and 
evening. This system is quite dry but afternoon heating and 
dynamical lift will result in late-day isolated/scattered showers 
and thunderstorms with the best focus across the south. Shower 
activity will diminish by the late evening hours. 

.LONG TERM...(Friday through Wednesday)
Issued at 221 PM MDT Wed Sep 22 2021

Dry and warm conditions are expected on Friday as the storm 
system exits the forecast area. The storm system which affected 
the area on Thursday will drop southwest and cutoff from the main 
flow over Baja California by Friday night. This system will slowly
eject eastward on Sunday and Monday with increasing clouds and
isolated late-day showers/thunderstorms across southern sections
late Sunday into Monday. Elsewhere, a flat ridge pattern will
dominate the western US with dry and very warm temperatures
expected through Monday. The ridge will amplify by late Monday as
the next storm system affects the Pacific Northwest region. 
Forecast confidence is low after Monday with the track and 
strength of the Pacific storm system. Low confidence forecast has 
southwest flow increasing across the region on Tuesday and 
Wednesday as this storm system moves into the Great Basin region. 
The threat of precipitation increases by midweek with an unsettled
weather pattern expected for the remainder of the workweek. 
Temperatures will cool to near normal on Wednesday with this next 
system. 

&&

.AVIATION...(For the 06Z TAFS through 06Z Thursday night)
Issued at 1130 PM MDT Wed Sep 22 2021

VFR conditions will prevail under an increasingly scattered to 
broken cirrus deck with light, terrain driven winds the rule 
across eastern Utah and western Colorado through the next 24 
hours. 

&&

.GJT WATCHES/WARNINGS/ADVISORIES...

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

&&

$$

SHORT TERM...MPM
LONG TERM...MPM
AVIATION...NL

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Western Regional Climate Center, wrcc@dri.edu