674
FXUS65 KBOI 030535
AFDBOI
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BOISE ID
1135 PM MDT SAT MAY 2 2026
UPDATE
UPDATED AVIATION DISCUSSION.
KEY MESSAGES
- ABOVE NORMAL TEMPERATURES THROUGH NEXT WEEK. SLIGHT COOLING
TUESDAY AND WEDNESDAY THEN WARMING AGAIN THURSDAY THROUGH
SATURDAY.
- SLIGHT CHANCE OF AFTERNOON/EVENING SHOWERS AND THUNDERSTORMS
SUNDAY. BETTER CHANCE MONDAY AFTERNOON/EVENING. DRYING FROM
THE WEST TUESDAY EXCEPT IN SOUTH-CENTRAL IDAHO WHERE A CHANCE
OF SHOWERS/STORMS WILL CONTINUE.
- WINDY MONDAY AFTERNOON IN SOUTHEAST OREGON AND THE SNAKE
BASIN IN IDAHO,
SHORT TERM /THROUGH MONDAY NIGHT/
ISSUED 213 PM MDT SAT MAY 2 2026
CONTINUED WARMING THROUGH SUNDAY BETWEEN AN UPPER RIDGE OVER
THE GREAT BASIN AND AN UPPER LOW OFF THE OR COAST. MONDAY
LOOKS SLIGHTLY COOLER AS THE UPPER LOW TURNS INLAND OVER CA
AND ELONGATES TOWARD NORTHERN NV. WE HAVE A 10-20 PERCENT
CHANCE OF SHOWERS AND THUNDERSTORMS LATE TODAY IN SOUTHWESTERN
HARNEY COUNTY, EXPANDING SUNDAY AFTERNOON TO INCLUDE SOUTHERN
MALHEUR COUNTY AND THE BLUE MOUNTAINS IN BAKER COUNTY. MONDAY
AFTERNOON AND EVENING LOOK WETTER AS THE UPPER LOW COMES INLAND
LEADING TO A 20-40 PERCENT CHANCE OF SHOWERS AND THUNDERSTORMS
ALL ACROSS OUR SOUTHERN CWA AND THE CAMAS PRAIRIE, BUT LEAVING
OTHER AREAS DRY. NORTHWEST WINDS WILL INCREASE TO 15 TO 25 MPH
MONDAY AFTERNOON IN SOUTHEAST OREGON AND THE SNAKE BASIN IN
IDAHO SOUTHWARD TO THE NEVADA BORDER, WITH GUSTS TO 35 MPH
BETWEEN BOISE AND TWIN FALLS.
LONG TERM /TUESDAY THROUGH SATURDAY/
ISSUED 213 PM MDT SAT MAY 2 2026
A LOW PRESSURE SYSTEM OFF THE COAST OF CALIFORNIA WILL PROGRESS
ACROSS THE DESERT SOUTHWEST ON TUESDAY, BRINGING MOISTURE INTO
OUR REGION. THIS WILL BRING INCREASED CHANCES OF SHOWERS AND
THUNDERSTORMS OVER SOUTHWEST IDAHO (20-40% CHANCE), WITH THE
BEST CHANCE OF PRECIPITATION OVER THE NEVADA BORDER. THE RIDGE
OF HIGH PRESSURE SITUATED OFF THE WEST COAST WILL KEEP
TEMPERATURES WARM AND ALLOW FOR NORTHERLY FLOW WITH GUSTY WINDS
ON TUESDAY AFTERNOON. THIS HIGH WILL THEN STEADILY BUILD OVER
THE WESTERN UNITED STATES THROUGH FRIDAY, BRINGING TEMPERATURES
5-10 DEGREES ABOVE NORMAL THROUGH THE END OF THE WEEK. A COUPLE
OF WEAK SHORTWAVE TROUGH PASSAGES OVER MONTANA WILL BRING
ELEVATED AFTERNOON PRECIPITATION CHANCES (10-30% CHANCE) OVER
THE WEST CENTRAL AND BOISE MOUNTAINS ON WEDNESDAY AND THURSDAY.
AVIATION /06Z SUNDAY THROUGH MONDAY/
ISSUED 1125 PM MDT SAT MAY 2 2026
VFR WITH SCT-BKN HIGH CLOUDS OVERNIGHT THROUGH MORNING. PATCHY
VALLEY SMOKE IN THE WEST CENTRAL AND BOISE MOUNTAINS OVERNIGHT.
ISOLATED SHOWERS AND THUNDERSTORMS TOMORROW AFTERNOON OVER SE
OR AND HIGH TERRAIN IN SW ID. GUSTY AND ERRATIC OUTFLOW WINDS
WITH BLOWING DUST ARE LIKELY NEAR SHOWERS AND THUNDERSTORMS.
SURFACE WINDS: VARIABLE UNDER 10 KT OVERNIGHT THROUGH MORNING,
THEN NW-NE 7-15 KT IN THE AFTERNOON/EVENING. WINDS ALOFT AT 10K
FT MSL: VARIABLE 5-10 KT.
KBOI...VFR WITH SCT HIGH CLOUDS OVERNIGHT THROUGH MORNING. SURFACE
WINDS: SE 5-10 KT OVERNIGHT THROUGH EARLY MORNING, THEN NW 5-10 KT
IN THE AFTERNOON.
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
AVIATION.....CH
SHORT TERM...LC
LONG TERM....SA
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