120
FXUS65 KBOI 251019
AFDBOI
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BOISE ID
419 AM MDT THU JUN 25 2026
KEY MESSAGES
- ISOLATED SHOWERS AND THUNDERSTORMS THIS MORNING IN THE CENTRAL
ID MOUNTAINS.
- A SIGNIFICANT PATTERN CHANGE ARRIVES FRIDAY AS A COOL UPPER
LEVEL TROUGH PUSHES A COLD FRONT THROUGH, BRINGING WIDESPREAD
SHOWERS AND COOLER TEMPERATURES.
- TEMPERATURES AROUND 15 TO 20 DEGREES BELOW NORMAL SATURDAY AND
SUNDAY.
- SIGNIFICANT PRECIPITATION AND LIGHT SNOW ABOVE 7000 FEET POSSIBLE
SATURDAY THROUGH SUNDAY.
SHORT TERM /THROUGH SATURDAY NIGHT/
A WEAK SHORTWAVE IS MOVING OVER THE AREA THIS MORNING WITH
ISOLATED SHOWERS EXTENDING FROM THE OWYHEE MOUNTAINS TO THE
BOISE MOUNTAINS THIS MORNING. SHOWERS MAY PRODUCE BRIEF GUSTY
WINDS THIS MORNING. THESE SHOWERS WILL MOVE EAST BY MID MORNING
WITH PARTIAL CLEARING AND ANOTHER WARM DAY THIS AFTERNOON. THE
UPPER LEVEL TROUGH OFF THE PACIFIC NW COAST WILL BRING INCREASED
CLOUDS LATE THIS AFTERNOON AND EVENING. GENERALLY CLOUDY SKIES
WITH VIRGA AND GUSTY WINDS THIS EVENING AS IT TAKES SOME TIME TO
MOISTEN UP THE LOWER LEVELS OF THE ATMOSPHERE. SHOWERS BECOME
WIDESPREAD ON FRIDAY MORNING IN EASTERN OR AND SPREAD ACROSS
SOUTHWEST ID BY MIDDAY. THEN PARTIAL CLEARING EXPECTED FRIDAY
AFTERNOON AS COOLER AIR ALOFT MOVES OVERHEAD. THIS WILL LEAD TO
UNSTABLE CONDITIONS WITH SCATTERED SHOWERS AND THUNDERSTORMS
DURING THE AFTERNOON. SHOWERS CONTINUE INTO SATURDAY WITH
ISOLATED THUNDERSTORMS. BREEZY NORTHWEST WINDS CONTINUE BEHIND
THE COLD FRONT. TEMPERATURES LOWER TO AROUND 15 TO 20 DEGREES
BELOW NORMAL SATURDAY. SIGNIFICANT PRECIPITATION POSSIBLE WITH
THIS SYSTEM, BUT WILL BE SHOWERY IN NATURE, AND DEPENDING ON
WHERE THE TRACK OF THE SYSTEM GOES. AS IT STANDS RIGHT NOW,
PRECIPITATION AMOUNTS OF UP TO 1 TO 1.25 INCH POSSIBLE OVER THE
CENTRAL ID MOUNTAINS, WITH LESSER AMOUNTS IN EASTERN OR, WHERE
0.25-0.5 INCH EXPECTED. SNAKE PLAIN WILL GENERALLY SEE 0.25 TO
0.5 INCH.
LONG TERM /SUNDAY THROUGH THURSDAY/
COOL AND SHOWERY CONDITIONS CONTINUE SUNDAY WITH A SLIGHT
CHANCE OF THUNDERSTORMS AS THE TROUGH SLOWLY MOVES OVERHEAD AND
NORTHEAST. TEMPERATURES REMAIN AROUND 15 TO 20 DEGREES BELOW
NORMAL SUNDAY. LIGHT SNOW POSSIBLE ON THE PEAKS ABOVE 7000 FEET
SUNDAY MORNING. CONDITIONS DRY OUT WITH BREEZY AND CONTINUED
COOL CONDITIONS ON MONDAY. MODELS ARE NOW TRENDING TOWARD
KEEPING UNSETTLED CONDITIONS THROUGH WEDNESDAY, WITH A WEAK
SHORTWAVE MOVING OVER NORTHEAST OR ON TUESDAY, AND SHOWERS
FAVORING THE MOUNTAINS. BELOW NORMAL TEMPERATURES EXPECTED
THROUGH WEDNESDAY BUT TEMPERATURES SLOWLY WARM TO NEAR NORMAL BY
THURSDAY AS CONDITIONS DRY OUT.
AVIATION /06Z THURSDAY THROUGH FRIDAY/
ISSUED 1245 AM MDT THU JUN 25 2026
VFR. ISOLATED VIRGA/LIGHT RAIN SHOWERS THROUGH THU/AM. A LOW CHANCE
OF LIGHTNING (<10% CHANCE) THROUGH THU/AM, MAINLY OVER THE
W-CENTRAL ID MTNS. ISOLATED THUNDERSTORMS DEVELOPING THU/PM,
MAINLY NEAR THE ID/NV BORDER AND W-CENTRAL ID MTNS. INCREASING
CLOUDS AND LOWERING CEILINGS IN E-OREGON LATE IN THE PERIOD,
WITH A COLD FRONT APPROACHING FROM THE WEST. SURFACE WINDS:
BECOMING VARIABLE 6-12 KT OVERNIGHT. THEN W-NW 10-15 KT WITH
LOCALIZED GUSTS TO AROUND 20 KT THU/PM. WINDS ALOFT AT 10KFT
MSL: VARIABLE 5-10 KT.
KBOI...VFR. ISOLATED VIRGA SHOWERS THROUGH THU/AM. INCREASING CLOUDS
AND LOWERING CEILINGS LATE IN THE PERIOD AHEAD OF A COLD FRONT.
SURFACE WINDS: VARIABLE (LEANING NW-SW) 3-8 KT OVERNIGHT, THEN NW 8-
12 KT THU/PM.
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...KA
LONG TERM....KA
AVIATION.....NF
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page