Jerome, Idaho 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

018
FXUS65 KBOI 311543
AFDBOI

Area Forecast Discussion
National Weather Service Boise ID
943 AM MDT Sat May 31 2025

.DISCUSSION...No change in the forecast this morning. Breezy
conditions will increase this afternoon in advance of a cold
front that will move through tonight. A wind advisory was issued
earlier, and it applies to the Lower Treasure Valley zone of
Oregon. This is an area basically from Ontario westward into the
lowest elevations. Importantly, this includes a section of I-84,
where northwest wind gusts 40-50 mph are possible tonight from
around 9 PM MDT to around sunrise. Temperatures today are still
expected to be near or above record levels for much of the area.
Please follow safety precautions for the heat, as today will
feel much hotter than any day so far this spring.

&&

.AVIATION...Mainly VFR with mostly clear skies. High density
altitude due to heat. Surface winds: SW-SE 5-15 kt, becoming NW 10-
20 kt with gusts 20-35 kt late this evening. Gusts up to 45-50 kt
between KBKE-KONO and around KMUO tonight. Patchy blowing dust
reducing visibility tonight. Winds aloft at 10kft MSL: SW-W 10-20 kt.

KBOI...VFR. High density altitude due to heat. SE winds 7-12 kt,
becoming light N to NE after 31/23Z. Then, NW 10-20 kt beginning
around 01/05Z. Blowing dust is possible with the NW wind tonight.

Sunday Outlook...Mainly VFR. A 15-30 percent chance of showers and
thunderstorms Sunday P.M. in the central ID mountains east of KMYL,
and along the ID/NV border including near KTWF-KJER. Surface winds:
NW 10-20 kt with gusts 25-35 kt, strongest around KBKE/KONO/KMUO.

&&

.PREV DISCUSSION...
SHORT TERM...Today through Monday night...An upper level ridge
axis will shift east of our area today, ushering in southwest
flow. This will increase temperatures by around 10 degrees from
yesterday, with near record temperatures expected in many
locations. Lower valleys will see highs well into the 90s and a
few locations may reach 100 degrees. A shortwave trough will
move by to our north tonight and push a dry cold front through
the area. The front will bring increased winds with gusts 25 to
40 mph, except up to 50 mph between Ontario and Huntington OR
along the I-84 corridor. Patchy blowing dust will also develop
along the front and may reduce visibilities.

The cold front will lower high temperatures by around 10-20
degrees on Sunday. Winds will remain gusty, especially across
the Snake Basin and along the I-84 corridor into eastern Oregon
with gusts to around 40 mph. A stronger upper level trough
approaching the area will bring a 15-30% chance of showers and
thunderstorms to the mountains of central Idaho and the higher
terrain near the Nevada border. Elsewhere, it will be too stable
behind the cold front and moisture too limited to support
shower development. The trough will push another cold front
through Sunday night. Gusty winds will continue into Monday with
temperatures cooling a few more degrees. Dry conditions across
the area will return on Monday.

LONG TERM...Tuesday through Saturday...A broad upper level
trough will persist across the West into the Northern Plains
through the extended period with an upper level ridge centered
off the coast. This will keep our area in northwest flow.
Tuesday is expected to be the coolest day with highs near
normal. A gradual warming trend will take place through the end
of the week as the ridge slowly builds toward the coast. By
Saturday, temperatures are forecast to be around 10 degrees
above normal. The axis of the broad trough should remain to our
east, keeping precipitation chances less than 15 percent
through the period. Winds will be gusty on Tuesday, then
decrease but remain locally breezy each afternoon through the
end of the week.

&&

.BOI WATCHES/WARNINGS/ADVISORIES...
ID...Heat Advisory until 7 PM MDT this evening IDZ012-014-016-033.
OR...Heat Advisory until 7 PM MDT /6 PM PDT/ this evening
     ORZ061>064.
     Wind Advisory from 9 PM MDT /8 PM PDT/ this evening to 6 AM
     MDT /5 AM PDT/ Sunday ORZ064.

&&

$$

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DISCUSSION...SP
AVIATION.....SH
SHORT TERM...ST
LONG TERM....ST