Emmett Weather

282
FXUS65 KBOI 302050
AFDBOI

Area Forecast Discussion
National Weather Service Boise ID
250 PM MDT Thu Apr 30 2026

.KEY MESSAGES...
- Isolated afternoon showers and thunderstorms on Thursday over
  the higher terrain of southwest Idaho and along the Nevada
  border.

- Warm and dry Friday and Saturday.

- High chance of thunderstorms Sunday evening through
  Wednesday, with most storm activity on Monday and Tuesday
  evenings.

&&

.SHORT TERM /Through Saturday Night/...
A weak shortwave will continue to move across Idaho this
evening for isolated showers and a few thunderstorms. The best
chances for this activity, roughly 15 to 20 percent, will be
focused over the central Idaho mountains and higher terrain near
the Nevada border. Any storms that form will be capable of
producing small hail and brief gusty winds. Elsewhere, expect
mostly sunny conditions with light winds.

An upper level ridge will begin to amplify over the Great Basin
on Friday, leading to a more stable and warmer pattern. High
temperatures will climb into the mid 70s for the lower
elevations, which is roughly 5 to 8 degrees above late April
averages. Winds will generally remain light and follow diurnal
patterns. The trend towards warmer conditions will continue into
Saturday, with highs expected to range between 8 to 12 degrees
above normal. This translates to high temperatures in the upper
70s to near 80 degrees for many lower elevations. Saturday will
remain dry across the area with ridging aloft. While a closed
low is progged to develop off the Pacific coast, its influence
will remain west of the region through Saturday night, keeping
conditions stable across southeast Oregon and southwest Idaho.

&&

.LONG TERM /Sunday through Thursday/...
An upper low off the coast of California will slowly move
inland early next week as an upper ridge persists over the
Pacific Northwest. This combination will bring well above normal
temperatures, afternoon/evening showers and thunderstorms, and
breezy winds early in the week. High temperatures will generally
be 10-15 degrees above normal, reaching the low 80s at lower
elevations. Moisture accompanying the low will increase across
our area on Sunday, leading to a 20-40% chance of showers and
thunderstorms in the higher terrain with lower chances
elsewhere. Monday will see the highest potential for showers and
thunderstorms across the area as the low moves to our south and
moisture and instability increase further. Shower and
thunderstorm chances will increase to 20-60% (highest near the
Nevada border), except lower across our northern areas. Storm
chances will begin to trend lower on Tuesday, then decrease
below 20% Wednesday and Thursday as the low moves east.
Precipitable water values in the 70-90th percentile will support
heavy rain in thunderstorms, with gusty winds and hail also
possible next week. Temperatures may trend a couple degrees
warmer Wednesday and Thursday as the center of the upper ridge
moves overhead.

&&

.AVIATION /18Z Thursday through Friday/...
Issued 1131 AM MDT THU APR 30 2026

VFR. Isolated showers and weak storms this afternoon over the
Boise Mtns and ID-NV border. Outflow gusts 20-30 kt. Surface
winds: NW-NE 5-15 kt. Winds aloft at 10kft MSL: E up to 10 kt.

KBOI...VFR. Isolated showers over Boise Mtns this afternoon,
with low potential for E-NE 20 kt outflow wind gusts to reach
KBOI late afternoon. Surface winds: NW 5-10 kt, becoming SE 5-10
kt overnight.

Weekend Outlook...Mainly VFR. Clear on Friday, increasing mid-
high clouds on Saturday with a slight chance of showers and
thunderstorms in south-central Oregon. A higher chance of
showers and thunderstorms Sunday afternoon in SE Oregon, ID-NV
border, and central Idaho mtns. Winds Friday and Saturday S-SE
5-15 kt, Sunday NW-NE 5-10 kt.

&&

.BOI WATCHES/WARNINGS/ADVISORIES...
ID...None.

OR...None.

&&

$$

www.weather.gov/Boise

Interact with us via social media:
www.facebook.com/NWSBoise
www.x.com/NWSBoise

SHORT TERM...JDS
LONG TERM....ST
AVIATION.....ST