FXUS65 KBOI 061952

AFDBOI



Area Forecast Discussion

National Weather Service Boise ID

152 PM MDT Sun Apr 6 2025



.SHORT TERM...Tonight through Tuesday night...The warmest

daytime highs in April (so far!) will occur today, with clear

skies and light winds dominating the weather across the region.

A cold front will continue to move onshore from the Oregon Coast

this evening, bringing showers and cooler temperatures to

southeast Oregon by late Sunday night. Showers will continue all

day tomorrow for most of the region, with the heaviest rain

falling in the afternoon-evening. Rainfall totals will be around

0.1-0.2 inches for lower elevations with anywhere from 0.5-1.0 

inches for elevations above about 5000 feet by Tuesday afternoon.

Snow will occur above about 6500-7500 feet for most of the 

region, with briefly lower snow levels (~5500-6500 feet) Monday 

night into Tuesday morning. Snow accumulations will be minimal. 

Instability will increase across the northern portions of the 

region by late afternoon, bringing the chance (20%) of a 

thunderstorm to Baker County-West Central Mountains through 

late evening. Temperatures will cool off a bit tomorrow, but the

shortwave trough will then quickly move east, as another ridge 

is set to rebuild over most of the region by Tuesday afternoon. 

Showers will linger over higher terrain on Tuesday, but 

accumulations will be minimal. Area rivers, creeks, and streams 

will continue to rise with warmer temperatures, bringing a 

return to minor flood stage for the Silvies River near Burns, OR

by Tuesday morning. 



.LONG TERM...Wednesday through Sunday...Models have changed

their tune about the midweek ridge rebuilding, with better

confidence in higher amplitude building through the region 

through Friday. This will bring another period of warm 

temperatures with the Treasure Valley potentially reaching near

80F on Thursday (~20% chance). Deterministic model runs and 

ensemble range has decreased the precipitation threat by this 

weekend, with the shortwave trough weakening and passing more to

our north through the weekend. Sunday looks to be the best 

chance of precipitation, with varying outcomes depending on 

where the low center passes. High terrain will favor any 

precipitation, with cool enough temperatures for high elevation 

snow. 



&&



.AVIATION...VFR with high clouds continues this evening. Lower 

VFR ceilings and MVFR/IFR rain showers and patchy mountain 

valley fog will increase tonight across SE Oregon and SW Idaho 

Monday morning. Mountains obscured in precipitation. Surface 

winds: SE-SW up to 15 kt. Winds aloft at 10kft: N-NW 5-15 kt 

shifting to SW 10-20 kt by Mon/00Z and increasing to 25-45 kt 

after Mon/06Z.



KBOI...VFR with light winds today. Increasing clouds tonight,

with rain showers creating brief MVFR visibility by Mon/13Z. 

Winds becoming SE 8-15 kt late this evening.



&&



.BOI WATCHES/WARNINGS/ADVISORIES...

ID...None.

OR...None.



&&



$$



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SHORT TERM...SA

LONG TERM....SA

AVIATION.....SA