093
FXUS65 KBOI 140919
AFDBOI
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BOISE ID
319 AM MDT WED OCT 14 2026
KEY MESSAGES
- COLD MORNING TEMPERATURES THIS MORNING WILL BRING PATCHY FROST
AND NEAR-FREEZING CONDITIONS, WITH FROST ADVISORIES IN EFFECT
FOR THE SNAKE PLAIN AND A FREEZE WARNING IN EFFECT FOR THE
MAGIC VALLEY THROUGH LATE MORNING TODAY.
- WARM AND DRY CONDITIONS WEDNESDAY THROUGH THE WEEKEND.
TEMPERATURES REACHING UP TO 15 DEGREES ABOVE NORMAL ON FRIDAY.
- POSSIBLE ACTIVE PATTERN BRINGING COOLER CONDITIONS AND
PRECIPITATION CHANCES EARLY NEXT WEEK.
SHORT TERM /THROUGH FRIDAY NIGHT/
THE AREA REMAINS UNDER A
DRY NORTHERLY FLOW ALOFT AHEAD OF A LARGE PACIFIC HIGH PRESSURE
MOVING IN, CONTINUING COLDER MORNING TEMPERATURES TODAY
(WEDNESDAY). VALLEY TEMPERATURES WILL DROP INTO THE LOWER TO MID
30S THIS MORNING, FAVORING PATCHY TO WIDESPREAD FROST
DEVELOPMENT. AS SUCH, FROST ADVISORIES REMAIN IN PLACE FOR ALL
SNAKE PLAIN VALLEY AREAS THIS MORNING. A COLDER POOL OVER
SOUTH- CENTRAL ID WILL WARRANT A FREEZE WARNING FOR THE MAGIC
VALLEY THROUGH THE LATE MORNING TODAY. LATER TODAY, THE
AFOREMENTIONED PACIFIC HIGH WILL QUICKLY BUILD INTO THE AREA,
BRINGING ELEVATED DAYTIME TEMPERATURES A FEW DEGREES WARMER THAN
YESTERDAY'S. THURSDAY THROUGH FRIDAY WILL SEE DAYTIME
TEMPERATURES 5 TO 10 DEGREES ABOVE NORMAL AS THE RIDGE FURTHER
CENTERS OVER THE NORTHWEST REGION THROUGH LATE WEEK. FRIDAY WILL
POTENTIALLY SEE PEAK TEMPERATURES UP TO 15 DEGREES ABOVE
NORMAL. CLEARING SKIES AND RADIATIONAL NIGHTTIME COOLING WILL
FAVOR THE DEVELOPMENT OF MORNING FROSTS AND PATCHY FOG,
ESPECIALLY IN SHELTERED VALLEY AREAS, EACH MORNING THROUGH
FRIDAY.
LONG TERM /SATURDAY THROUGH WEDNESDAY/
STRONG HIGH PRESSURE ALOFT
WILL CONTINUE WARMER THAN NORMAL TEMPERATURES, POTENTIALLY 10 TO 15
DEGREES ABOVE NORMAL, ON SATURDAY. A NORTHWEST SHORTWAVE AND
ASSOCIATED DRY COLD FRONT ON SUNDAY WILL HELP DROP TEMPERATURES A
FEW DEGREES, BUT WILL STILL BE 5 TO 10 DEGREES ABOVE NORMAL. ON
SUNDAY, OUR AREA WILL COME UNDER A STRONG SOUTHWEST FLOW AHEAD OF AN
INCOMING PACIFIC UPPER LOW FROM THE GULF OF ALASKA. THIS FLOW WILL
KEEP MONDAY SLIGHTLY WARMER THAN NORMAL BUT WITH INCREASING HIGH
CLOUDS FROM THE WEST. TUESDAY THROUGH WEDNESDAY, THERE IS
CONSIDERABLE GUIDANCE UNCERTAINTY OVER THE UPPER LOW'S MOVEMENT
PATTERN AS IT NEARS OUR AREA. FOR NOW, TUESDAY THROUGH WEDNESDAY
WILL POTENTIALLY SEE COOLER THAN NORMAL TEMPERATURES AND
PRECIPITATION CHANCES OVER MOST OF THE AREA.
AVIATION /06Z WEDNESDAY THROUGH THURSDAY/
ISSUED 1154 PM MDT TUE OCT 13 2026
VFR WITH MOSTLY CLEAR SKIES. PATCHY VALLEY FOG IN CENTRAL ID
MOUNTAINS AND THE OR BLUE MOUNTAINS IN THE EARLY MORNING HOURS.
SURFACE WINDS: VARIABLE 5-10 KT OVERNIGHT WITH A RETURN TO NW
5-15 KT LATE IN THE MORNING THROUGH THE AFTERNOON. WINDS ALOFT
AT 10KFT MSL: N-NE 10-25 KT.
KBOI...VFR UNDER CLEAR SKIES. SURFACE WINDS: VARIABLE UNDER 8 KT
OVERNIGHT WITH A RETURN TO NW 5-10 KT LATE MORNING THROUGH
AFTERNOON.
BOI WATCHES/WARNINGS/ADVISORIES
ID...FROST ADVISORY UNTIL 10 AM MDT THIS MORNING FOR IDZ012-014.
FREEZE WARNING UNTIL 10 AM MDT THIS MORNING FOR IDZ016.
OR...FROST ADVISORY UNTIL 10 AM MDT /9 AM PDT/ THIS MORNING FOR
ORZ064.
WWW.WEATHER.GOV/BOISE
INTERACT WITH US VIA SOCIAL MEDIA:
WWW.FACEBOOK.COM/NWSBOISE
WWW.X.COM/NWSBOISE
SHORT TERM...JY
LONG TERM....JY
AVIATION.....SA
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