911
NZUS99 KBOI 091713
TXTSFD
IDAHO STATE FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BOISE ID
1013 AM MST FRI JAN 9 2026
SNOW SHOWERS WILL TAPER OFF ACROSS THE CENTRAL AND NORTHERN MOUNTAINS TONIGHT
AS A RIDGE OF HIGH PRESSURE BEGINS TO BUILD INTO THE REGION. THIS HIGH PRESSURE
SYSTEM WILL DOMINATE THE WEATHER PATTERN ACROSS IDAHO THROUGH THE UPCOMING
WEEKEND, BRINGING DRY CONDITIONS AND CLEARING SKIES TO THE HIGHER TERRAIN.
HOWEVER, THE STABLE ATMOSPHERE WILL LEAD TO THE DEVELOPMENT OF STRONG
TEMPERATURE INVERSIONS, RESULTING IN AREAS OF DENSE FOG AND LOW STRATUS CLOUDS
IN THE VALLEYS OF SOUTHERN, CENTRAL, AND NORTHERN IDAHO DURING THE LATE NIGHT
AND MORNING HOURS. AIR STAGNATION AND DEGRADED AIR QUALITY MAY BECOME A CONCERN
IN VALLEY LOCATIONS BY SUNDAY. A WEAK WEATHER DISTURBANCE IS FORECAST TO MOVE
OVER THE TOP OF THE RIDGE LATE MONDAY INTO TUESDAY, BRINGING INCREASED CLOUD
COVER AND A CHANCE OF LIGHT RAIN AND SNOW PRIMARILY TO THE IDAHO PANHANDLE AND
THE CENTRAL MOUNTAINS. SNOW LEVELS WITH THIS SYSTEM WILL BE RELATIVELY HIGH,
RISING TO BETWEEN 4000 AND 6000 FEET. SOUTHERN IDAHO IS EXPECTED TO REMAIN
MOSTLY DRY WITH CONTINUED VALLEY INVERSIONS THROUGH THE MIDDLE OF NEXT WEEK.
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