661
FXUS65 KBOI 310337
AFDBOI
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BOISE ID
937 PM MDT FRI MAY 30 2025
DISCUSSION
A RIDGE WILL CONTINUE TO STRENGTHEN OVER THE AREA
TONIGHT AS A TROUGH APPROACHES THE COAST WITH SOUTHWEST FLOW
ALOFT. TEMPERATURES WILL WARM AROUND 10-15 DEGREES ON SATURDAY
COMPARED TO TODAY WITH RECORD HIGHS LIKELY IN MOST LOCATIONS.
TEMPERATURES WILL BE AROUND 100F IN THE BOISE METRO SATURDAY. A
COLD FRONT WILL MOVE THROUGH THE AREA SATURDAY NIGHT, BRINGING
BREEZY WEST-NORTHWEST WINDS UP TO 30 MPH, EXCEPT STRONGER WINDS
UP TO 45 MPH POSSIBLE OVER BAKER COUNTY NEAR HUNTINGTON OR AND
FAREWELL BEND ALONG THE I-84 CORRIDOR. BREEZY CONDITIONS
CONTINUE INTO SUNDAY WITH DUSTY CONDITIONS DUE TO THE WINDS. NO
UPDATES.
AVIATION
VFR. HIGH DENSITY ALTITUDE DUE TO HEAT. SURFACE
WINDS 10KT OR LESS, BECOMING SW-SE 5-15KT SAT AFTERNOON,
SHIFTING TO THE NW 10-20KT WITH GUSTS TO 35KT NEAR KONO SAT
EVENING. WINDS ALOFT AT 10KFT MSL: NW 5-10KT BECOMING SW
15-25KT BY 18Z/SAT.
KBOI...VFR. SE WINDS 5-10KT, SHIFTING TO NW 10-20KT LATE SAT
EVENING.
SUNDAY OUTLOOK...VFR. A 15-30 PERCENT CHANCE OF SHOWERS AND
THUNDERSTORMS IN SW ID SUNDAY AFTERNOON AND EVENING, PRIMARILY
NEAR KBKE KMYL AND KTWF KJER. SURFACE WINDS: NW 10-20 KT WITH
GUSTS TO 30-40 KT, STRONGEST AROUND KBKE KONO KMUO.
PREV DISCUSSION
SHORT TERM...TONIGHT THROUGH SUNDAY NIGHT...AN UPPER LEVEL
RIDGE AXIS WILL PASS TO OUR EAST TONIGHT, ALLOWING STRENGTHENING
SW FLOW ALOFT TO MOVE INTO THE AREA. THIS WILL BRING HOT AIR
NORTHWARD, AND GIVE US NEAR-RECORD HIGHS SATURDAY. THE HEAT
ADVISORY WILL REMAIN IN PLACE AS ISSUED. TEMPERATURES WILL BE IN
THE UPPER 90S TO NEAR 100 IN THE LOWER ELEVATIONS, AND 80S TO
90S IN POPULATED MOUNTAIN AREAS. ONLY THE HIGHEST PEAKS WILL
HAVE HIGHS IN THE 60S. A WEAK SHORT WAVE (SPEED MAX) WILL MOVE
BY TO THE NORTH SATURDAY NIGHT, SENDING A DRY COLD (COOL?) FRONT
SOUTHEAST ACROSS US. THIS WILL RESULT IN GUSTY NW WINDS AND A
NOTABLE DECREASE IN TEMPERATURES SUNDAY AND SUNDAY NIGHT. A
STRONGER UPPER LEVEL TROUGH WILL APPROACH SUNDAY AND MOVE
THROUGH SUNDAY NIGHT, BRINGING ANOTHER COLD FRONT. IT WILL ALSO
INCREASE INSTABILITY AND PROVIDE FOR A CHANCE OF SHOWERS AND
THUNDERSTORMS SUNDAY NIGHT, MAINLY ACROSS THE FAR SOUTH IN
IDAHO, ALTHOUGH ISOLATED MOUNTAIN SHOWERS/STORMS CANNOT BE RULED
OUT.
LONG TERM...MONDAY THROUGH FRIDAY...A BROAD UPPER-LEVEL TROUGH AND
SPLIT FLOW ARE THE STORY POINTS IN THE EXTENDED. EMBEDDED SHORTWAVE
TROUGHS AND CUT-OFF LOW PRESSURE SYSTEMS WILL WEAVE THEIR WAY EITHER
SOUTH OR NORTHEAST OF THE AREA. NW FLOW ALOFT IS FORECAST TO PERSIST
THROUGHOUT THE EXTENDED, KEEPING NEAR-NORMAL TEMPERATURES AND DRY
CONDITIONS. ON MONDAY AFTERNOON AND EVENING, WIND GUSTS UPWARDS OF
35 MPH ARE LIKELY (60-90% CHANCE) TO MOVE THROUGH THE SNAKE
PLAIN. MID-WEEK ON, A SLIGHT TREND UPWARDS IN MAX TEMPERATURES
IS FORECAST.
BOI WATCHES/WARNINGS/ADVISORIES
ID...HEAT ADVISORY FROM NOON TO 7 PM MDT SATURDAY
IDZ012-014-016-033.
OR...HEAT ADVISORY FROM NOON MDT /11 AM PDT/ TO 7 PM MDT /6 PM PDT/
SATURDAY ORZ061>064.
WWW.WEATHER.GOV/BOISE
INTERACT WITH US VIA SOCIAL MEDIA:
WWW.FACEBOOK.COM/NWSBOISE
WWW.X.COM/NWSBOISE
DISCUSSION...KA
AVIATION.....KA
SHORT TERM...SP
LONG TERM....CH
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