208
FXUS65 KMSO 171005
AFDMSO
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE MISSOULA MT
405 AM MDT MON AUG 17 2026
DISCUSSION
KEY MESSAGES:
- SHOWER AND THUNDERSTORM ACTIVITY WILL CONTINUE EACH AFTERNOON
THROUGH TUESDAY.
- WARMING AND DRYING LATTER PART OF NEXT WEEK UNDER A RIDGE OF
HIGH PRESSURE.
THE NORTHERN ROCKIES WILL CONTINUE TO BE IMPACTED BY AFTERNOON
SHOWERS AND THUNDERSTORMS. ONCE AGAIN THESE STORMS WILL BE CAPABLE
OF MODERATE TO HEAVY RAIN, SMALL HAIL AND LIGHTNING. THE SHOWER
ACTIVITY WILL LINGER INTO THE EVENING HOURS THEN DIMINISH AFTER
SUNSET.
A WEAK DISTURBANCE IS STILL ON TRACK TO MOVE THROUGH THE REGION ON
TUESDAY CAUSING A SLIGHT INCREASE IN AFTERNOON WINDS. THIS
DISTURBANCE WILL ALSO BE THE CATALYST FOR ANOTHER ROUND OF SHOWERS
AND THUNDERSTORMS ACROSS THE NORTHERN ROCKIES DURING THE AFTERNOON
AND EVENING HOURS.
A RIDGE OF HIGH PRESSURE BUILDS OVER THE REGION WEDNESDAY THROUGH
THE END OF THE WEEK CAUSING A WARMING AND DRYING TREND.
TEMPERATURES ARE ANTICIPATED TO BE AROUND 10 DEGREES ABOVE AVERAGE
BY THURSDAY AND FRIDAY. THEN THIS WEEKEND A DISTURBANCE WILL TRACK
ACROSS THE PACIFIC NORTHWEST INTO THE NORTHERN ROCKIES BRINGING
COOLER AIR, INCREASED WINDS AND MORE CONVECTION.
AVIATION
YESTERDAY'S PRECIPITATION IS ONCE AGAIN CAUSING THE
DEVELOPMENT OF PATCHY FOG AND LOW STRATUS. KGPI HAS ALREADY
DEVELOPED FOG THIS MORNING AND WILL CONTINUE TO BE IMPACTED BY LOW
VISIBILITY THROUGH LATE MORNING. THE HIGH LEVEL CLOUDS ARE
LIMITING THE OVERALL EXTENT OF THE FOG AND STRATUS, BUT ALL
TERMINALS COULD STILL BE IMPACTED THIS MORNING. MORE STORMS ARE
EXPECTED TO DEVELOP ACROSS THE NORTHERN ROCKIES THIS AFTERNOON
CAUSING MODERATE TO HEAVY RAIN, SMALL HAIL AND LIGHTNING. ONCE
AGAIN ALL THE TERMINALS HAVE THE POTENTIAL OF BEING IMPACTED BY
THE STORMS TODAY.
MSO WATCHES/WARNINGS/ADVISORIES
MT...NONE.
ID...NONE.
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