248
FXUS65 KBOI 150908
AFDBOI
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BOISE ID
208 AM MST WED JAN 15 2025
SHORT TERM...TODAY THROUGH FRIDAY NIGHT
AN UPPER RIDGE
WILL CONTINUE DRY STABLE CONDITIONS, LIGHT WINDS, AND NEAR-
NORMAL TEMPERATURES. PATCHY OVERNIGHT AND MORNING VALLEY FOG
EXPECTED WITH A BUILDING INVERSION. THE RIDGE WEAKENS AND
NORTHWESTERLY FLOW SETS IN ON THURSDAY, ALLOWING A COLD FRONT TO
MOVE THROUGH FRIDAY MORNING. IN TERMS OF PRECIPITATION, THE
FRONT WILL ONLY BRING A 10-30% CHANCE OF SNOW TO THE FAR NE
CORNER OF OUR AREA, NEAR THE BOISE AND WEST CENTRAL MTNS. WINDS
ON FRIDAY WILL BE BREEZY AS WELL. THE MORE SIGNIFICANT IMPACT
WILL BE THE MUCH COLDER TEMPERATURES IN THE NEW AIRMASS HEADING
INTO THE LONG TERM.
LONG TERM...SATURDAY THROUGH WEDNESDAY
IN THE NEW COLDER
AIRMASS, TEMPERATURES DROP TO 5-10 DEGREES BELOW NORMAL ON
SATURDAY. ANOTHER SURGE OF COLD AIR ARRIVES SUNDAY/MONDAY,
DROPPING TEMPS FURTHER TO 10-15 DEGREES BELOW NORMAL BY THE END
OF MONDAY. IN THE TREASURE VALLEY, THIS MEANS HIGHS NEAR TO
JUST BELOW FREEZING AND LOWS IN THE MID-TEENS. ON TUESDAY,
ANOTHER HIGH BEGINS BUILDING IN THE WEST, KICKING OFF A SLIGHT
WARMING TREND.
AVIATION
VFR UNDER MOSTLY CLEAR SKIES. LOCAL IFR IN MTN-
VALLEY FOG. SURFACE WINDS: VARIABLE SE 5-15 KT. WINDS ALOFT AT
10KFT MSL: N-NW 10-15 KT.
KBOI...VFR. LIGHT SE WINDS THROUGH THE TAF PERIOD.
AIR STAGNATION
AN AIR STAGNATION ADVISORY REMAINS IN EFFECT
FOR THE SE OREGON AND SW IDAHO VALLEYS THROUGH FRIDAY MORNING.
MIXING HEIGHTS AROUND 2000 FEET AGL OR LOWER ALONG WITH LIGHT
BOUNDARY LAYER WINDS WILL CONTINUE THE STAGNANT CONDITIONS. A
COLD FRONT WILL IMPROVE MIXING ON FRIDAY.
BOI WATCHES/WARNINGS/ADVISORIES
ID...AIR STAGNATION ADVISORY UNTIL 11 AM MST FRIDAY
IDZ011>016-028>030-033.
OR...AIR STAGNATION ADVISORY UNTIL 11 AM MST /10 AM PST/ FRIDAY
ORZ061>064.
WWW.WEATHER.GOV/BOISE
INTERACT WITH US VIA SOCIAL MEDIA:
WWW.FACEBOOK.COM/NWSBOISE
WWW.TWITTER.COM/NWSBOISE
SHORT TERM...JM
LONG TERM....JM
AVIATION.....JM
AIR STAGNATION...JM
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