547
FXUS65 KBOI 131159
AFDBOI
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BOISE ID
559 AM MDT SAT JUN 13 2026
UPDATE
UPDATED AVIATION DISCUSSION.
KEY MESSAGES
- CLEAR, WARMER, AND DRIER CONDITIONS PERSIST THROUGH SUNDAY
BEFORE RAPID WARMING BEGINS MONDAY.
- BREEZY AFTERNOON WINDS WILL IMPACT BAKER COUNTY AND THE LOWER
TREASURE VALLEY TODAY.
- SIGNIFICANT HEAT ARRIVES TUESDAY WITH TEMPERATURES PEAKING
NEAR 15 DEGREES ABOVE NORMAL, FOLLOWED BY A SLIGHT COOLING
TREND AND A CHANCE OF THUNDERSTORMS NEAR THE NEVADA BORDER
LATE IN THE WEEK.
SHORT TERM /THROUGH MONDAY NIGHT/
ISSUED 307 AM MDT SAT JUN 13 2026
AN AMPLIFIED UPPER LEVEL RIDGE POSITIONED OFF THE PACIFIC COAST
WILL REMAIN THE DOMINANT WEATHER DRIVER FOR SOUTHEAST OREGON
AND SOUTHWEST IDAHO THROUGH THE WEEKEND. THIS PATTERN WILL
SUPPORT CLEAR SKIES, DRY AIR, AND A STEADY WARMING TREND ACROSS
THE REGION. AFTERNOON HIGH TEMPERATURES WILL PUSH INTO THE MID
80S TODAY AND SUNDAY WITHIN THE LOWER VALLEYS. THE PRIMARY SHORT
TERM CONCERN CENTERS AROUND BREEZY NORTHWEST TO NORTH WINDS
DEVELOPING EACH AFTERNOON. THE STRONGEST WINDS WILL BE ACROSS
BAKER COUNTY INTO THE LOWER TREASURE VALLEY WHERE GUSTS BETWEEN
20 TO 30 MPH ARE LIKELY BEFORE WINDS TAPER OFF AFTER SUNSET.
EXCELLENT RADIATIONAL COOLING CONDITIONS WILL REMAIN INTACT
OVERNIGHT UNDER CLEAR SKIES, KEEPING NIGHTTIME MINIMUMS
COMFORTABLY COOL. HIGH PRESSURE SHIFTS EASTWARD DIRECTLY OVER
THE INTERMOUNTAIN WEST ON MONDAY, KICKING OFF A PERIOD OF
SIGNIFICANT WARMING WITH TEMPERATURES CLIMBING INTO THE LOW 90S
IN THE VALLEY.
LONG TERM /TUESDAY THROUGH SATURDAY/
ISSUED 307 AM MDT SAT JUN 13 2026
MODEL GUIDANCE IS IN STRONG AGREEMENT THAT TUESDAY WILL BE THE
WARMEST DAY OF THE WEEK, WITH VALLEY LOCATIONS LIKELY SEEING
AFTERNOON HIGHS REACHING THE MID TO UPPER 90S. THIS IS ABOUT 15
DEGREES ABOVE SEASONAL NORMALS. THE RIDGE WILL BEGIN TO FLATTEN
BY MID-WEEK AS AN UPPER LEVEL TROUGH TRACKS WELL TO OUR NORTH
ACROSS WESTERN CANADA. THIS EVOLUTION WILL INTRODUCE A SLIGHT
COOLING TREND BY WEDNESDAY AND THURSDAY, THOUGH TEMPERATURES
WILL REMAIN AROUND 10 DEGREES ABOVE NORMAL. LATER IN THE WEEK, A
CLOSED LOW AMPLIFIES AND WEAKENS THE RIDGE, DROPPING
TEMPERATURES SLIGHTLY TO 5 TO 10 DEGREES ABOVE NORMAL BY
SATURDAY. WINDS CONTINUE TO GUST 20 TO 30 MPH IN THE LOWER SNAKE
PLAIN THROUGH THIS PERIOD, AND AS THE LOW APPROACHES, THE
CHANCE FOR THUNDERSTORMS ALONG THE NEVADA BORDER INCREASES
THURSDAY AND FRIDAY.
AVIATION /12Z SATURDAY THROUGH SUNDAY/
ISSUED 544 AM MDT SAT JUN 13 2026
VFR, FEW HIGH CLOUDS. SURFACE WINDS: VARIABLE 5-15 KT BECOMING
NW-NE 10-20 KT WITH GUSTS TO 20-30 KT THIS AFTERNOON. WINDS
ALOFT AT 10KFT MSL: NW-N 15-25 KT.
KBOI...VFR, FEW HIGH CLOUDS. SURFACE WINDS: W-N 5-15 KT. GUSTS
TO 20- 25 KT WILL RETURN THIS AFTERNOON.
SUNDAY OUTLOOK...VFR AND PASSING HIGH CLOUDS. A FEW AFTERNOON
MOUNTAIN CUMULUS. SURFACE WINDS: VARIABLE 5-15 KT SUNDAY AM,
THEN NW- NE 5-15 KT WITH GUSTS AROUND 20 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.....JDS
SHORT TERM...JDS
LONG TERM....JDS
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