934
FXUS65 KPIH 050419
AFDPIH

Area Forecast Discussion
National Weather Service Pocatello ID
1019 PM MDT Sat Apr 4 2026

.KEY MESSAGES...

- Upper level high pressure dominates the western states,
  keeping skies mostly clear and conditions dry this weekend.

- Warming trend continues until temperatures level off on
  Tuesday.

- Low moving through southern Canada brings light precipitation
  and gusty winds Tuesday into Wednesday.

&&

.DISCUSSION...
Issued at 106 PM MDT Sat Apr 4 2026

A ridge of high pressure continues to build over the West this
weekend. This will keep us dry throughout the weekend and allow our
temperatures to warm slightly each afternoon. Highs today will make
it to nearly 60 degrees in the eastern Magic Valley and Snake River
Plain and we`ll be about 5 to 10 degrees warmer on Sunday afternoon
with most in the mid to upper 60s. By Monday, we`ll see highs warm a
few more degrees into the upper 60s and low 70s.

A weak shortwave passes through the area late Monday, which will
flatten the ridge enough to drop temperatures just a couple of
degrees for Tuesday afternoon, but at the same time an area of low
pressure will be dropping into southern Canada that will bring a
strong cold front through Eastern Idaho on Wednesday to drop highs
into the 50s and low 60s for Wednesday through Friday. There is good
model agreement on this cool down, but less agreement on amount of
precipitation heading our way for the middle and second half of the
week. Precip looks generally confined to the higher elevations of
the Central Mountains and Eastern Highlands late Tuesday as the cold
front approaches and precipitation chances increase to about 20 to
50 percent area wide on Wednesday. However, it looks like models are
trending a bit drier on Wednesday than they were yesterday, so we
will have to see how this trends over the next few days. As you
might guess, it looks like we`ll get windy Tuesday into Wednesday
with the frontal passage with models already showing gusts of 30 to
40 mph. Between the ECMWF and GFS, there are wild differences in how
the two handle not one, but two lows in the West behind the cold
front. We are a week out from this, so it is very much "wait and
see" at this point, but it will keep the precipitation chances and
the 50s and 60s around to end the week.

&&

.AVIATION /06Z TAFS THROUGH 06Z MONDAY/...
Issued at 1018 PM MDT Sat Apr 4 2026

Light winds expected over the next 24 hours. Some high clouds
will arrive Sunday afternoon. Winds at SUN should turn from
downvalley to upvalley around midday.

&&

.PIH WATCHES/WARNINGS/ADVISORIES...
None.

&&

$$

DISCUSSION...AMM
AVIATION...13