921
FXUS65 KBOI 010309
AFDBOI
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BOISE ID
909 PM MDT SAT MAY 31 2025
DISCUSSION
BOISE TIED ITS ALL TIME RECORD HIGH IN MAY WITH
100F THIS AFTERNOON, THIS IS ONLY THE SECOND TIME IN 150 YEARS
OF RECORDS BOISE HAS HIT 100F IN MAY. A COLD FRONT IS TRACKING
ACROSS THE LOWER TREASURE VALLEY THIS EVENING AND MOVING
SOUTHEASTWARD. WIND GUSTS UP TO 47 MPH REPORTED NEAR HUNTINGTON
OR. ONTARIO BRIEFLY REPORTED VISIBILITIES DOWN TO 2 MILES AS THE
FRONT MOVED THROUGH WITH GUSTS TO 40 MPH. THIS FRONT WILL TRACK
ACROSS THE BOISE METRO OVER THE NEXT HOUR TOWARD THE MAGIC
VALLEY LATE THIS EVENING WITH GUSTS OF 30 TO 40 MPH. THE
STRONGEST WINDS WILL BE FOCUSED ALONG THE SNAKE RIVER.
TEMPERATURES ON SUNDAY AFTERNOON WILL BE AROUND 15-20 DEGREES
COOLER THAN TODAY WITH BREEZY NORTHWEST WINDS CONTINUING THROUGH
THE DAY. CURRENT FORECAST REFLECTS THIS WELL WITH NO UPDATES
PLANNED.
AVIATION
MAINLY VFR. PATCHY BLOWING DUST REDUCING VISIBILITY
THIS EVENING/OVERNIGHT. HIGH DENSITY ALTITUDE DECREASING OVERNIGHT.
SURFACE WINDS: NW 10-20 KT GUSTING TO 20-35 KT THIS EVENING/OVERNIGHT.
GUSTS UP TO 45-50 KT BETWEEN KBKE-KONO AND NEAR KMUO TONIGHT.
WINDS ALOFT AT 10KFT MSL: W-SW 10-20 KT.
KBOI...VFR. BLOWING DUST POSSIBLE OVERNIGHT LOWERING VISIBILITY.
SURFACE WINDS: NW 10-20 KT GUSTING TO 22-27 KT OVERNIGHT.
PREV DISCUSSION
SHORT TERM...TONIGHT THROUGH MONDAY NIGHT...A COLD FRONT IS
POISED TO MOVE THROUGH THE AREA TONIGHT, ENTERING BAKER COUNTY
AROUND 5 PM PDT, AND EXITING TO OUR AROUND SUNRISE SUNDAY. LIGHT
SHOWERS MAY ACCOMPANY THE FRONT IN VALLEY COUNTY. A WIND
ADVISORY HAS BEEN ISSUED FOR THE LOWER TREASURE VALLEY OF OREGON
FOR THIS EVENING AND OVERNIGHT. WIND GUSTS TO 50 MPH ARE LIKELY
FROM ONTARIO TO THE WEST AND NORTHWEST. WHILE NO ADVISORY IS IN
PLACE FOR BAKER COUNTY, THE STRONGEST WINDS WILL STRETCH JUST
UP INTO THE SOUTHEAST CORNER SO FOLKS THERE SHOULD PREPARE AS IF
AN ADVISORY IS IN PLACE. BLOWING DUST MAY OCCUR ALONG AND FOR A
FEW HOURS AFTER FRONTAL PASSAGE IN LOWER ELEVATIONS, BUT IT IS
NOT EXPECTED TO REDUCE VISIBILITIES BELOW 2 MILES. OTHERWISE,
TODAY IS THE HOT DAY WE HAVE BEEN FORECASTING FOR DAYS, AND IT'S
WORKING OUT AS EXPECTED. RECORDS WILL BE SET THIS AFTERNOON.
SUNDAY WILL BE 15 TO 20 DEGREES COOLER, BUT STILL ABOVE AVERAGE
FOR THE DATE. SCATTERED SHOWERS AND ISOLATED THUNDERSTORMS ARE
FORECAST ALONG THE EASTERN EDGE OF THE CWA IN THE MOUNTAINS
(GENERALLY FROM YELLOW PINE SOUTH TO LOWMAN AND THEN SOUTHEAST
OF ATLANTA), AND ALSO IN SOUTHERN TWIN FALLS COUNTY AND FAR
SOUTHEAST OWYHEE COUNTY FOR SUNDAY AFTERNOON, CONTINUING INTO
THE EVENING IN THE OWYHEE AND TWIN FALLS AREAS (BUT NOT IN THE
MOUNTAINS). THE REMAINDER OF SUNDAY NIGHT THROUGH MONDAY NIGHT
WILL BE DRY AND BREEZY. MONDAY'S TEMPS WILL BE JUST A COUPLE
DEGREES ABOVE NORMAL.
LONG TERM...TUESDAY THROUGH SATURDAY...THE FORECAST AREA WILL
BECOME SANDWICHED BETWEEN STRONG HIGH PRESSURE OVER THE EASTERN
PACIFIC, AND LOW PRESSURE OVER THE NORTHERN US. AS A RESULT,
NORTHWEST FLOW WILL DOMINATE ALOFT FOR SW IDAHO AND SE OREGON
TUESDAY THROUGH FRIDAY. INTERMITTENT SHORTWAVE TROUGHS WILL
MIGRATE THROUGH THE NORTHWEST FLOW, BUT LIMITED MOISTURE HAS
KEPT THE PROBABILITY OF AFTERNOON SHOWERS AND THUNDERSTORMS AT
OR BELOW 15 PERCENT. TEMPERATURES ARE FORECAST TO BE SLIGHTLY
ABOVE NORMAL THROUGH WEDNESDAY, BUT A WARMING TREND IS EXPECTED
TOWARD THE END OF THE WEEK AS HEIGHTS BEGIN TO RISE. EXPECT
AFTERNOON BREEZES THROUGH THE EXTENDED.
BOI WATCHES/WARNINGS/ADVISORIES
ID...NONE.
OR...WIND ADVISORY UNTIL 6 AM MDT /5 AM PDT/ SUNDAY ORZ064.
WWW.WEATHER.GOV/BOISE
INTERACT WITH US VIA SOCIAL MEDIA:
WWW.FACEBOOK.COM/NWSBOISE
WWW.X.COM/NWSBOISE
DISCUSSION...KA
AVIATION.....NF
SHORT TERM...SP
LONG TERM....SH
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