577
FPUS55 KMSO 181823
ZFPMSO

Zone Forecast Product
National Weather Service Missoula MT
1222 PM MDT Fri Sep 18 2026

MTZ001-191000-
Kootenai/Cabinet Region-
Including the cities of Libby and Eureka
1222 PM MDT Fri Sep 18 2026

.TONIGHT...Partly cloudy. Lows in the 40s to lower 50s.
.SATURDAY...Mostly sunny. Highs in the mid 70s to lower 80s.
.SATURDAY NIGHT...Partly cloudy. Lows in the 40s to lower 50s.
.SUNDAY...Sunny. Highs in the mid 70s to lower 80s.
.SUNDAY NIGHT...Clear. Lows in the mid 40s to lower 50s.
.MONDAY...Mostly sunny. Highs in the upper 70s to mid 80s.
.MONDAY NIGHT...Mostly clear. Lows in the mid 40s to lower 50s.
.TUESDAY...Mostly sunny. Highs in the mid 70s to lower 80s.
.TUESDAY NIGHT...Partly cloudy. Lows in the mid 40s to lower 50s.
.WEDNESDAY...Partly cloudy. Highs in the 70s.
.WEDNESDAY NIGHT...Partly cloudy. Lows in the 40s to lower 50s.
.THURSDAY...Partly cloudy. Highs in the 70s to lower 80s.
.THURSDAY NIGHT...Partly cloudy. Lows in the mid 40s to lower
50s.
.FRIDAY...Partly cloudy. Highs in the 70s.

$$

MTZ002-191000-
West Glacier Region-
Including the city of Swan Lake
1222 PM MDT Fri Sep 18 2026

.TONIGHT...Mostly cloudy. Lows in the mid 40s to lower 50s.
.SATURDAY...Partly cloudy. Highs in the mid 60s to lower 70s.
.SATURDAY NIGHT...Partly cloudy. Lows in the 40s to lower 50s.
.SUNDAY...Mostly sunny. Highs in the mid 60s to lower 70s.
.SUNDAY NIGHT...Clear. Lows in the mid 40s to lower 50s.
.MONDAY...Sunny. Highs in the mid 60s to lower 70s.
.MONDAY NIGHT...Mostly clear. Lows in the mid 40s to lower 50s.
.TUESDAY...Partly cloudy. Highs in the mid 60s to lower 70s.
.TUESDAY NIGHT...Partly cloudy. Lows in the mid 40s to lower 50s.
.WEDNESDAY...Mostly sunny. Highs in the 60s.
.WEDNESDAY NIGHT...Partly cloudy. Lows in the mid 40s to lower
50s.
.THURSDAY...Partly cloudy. Highs in the mid 60s to lower 70s.
.THURSDAY NIGHT...Partly cloudy. Lows in the mid 40s to lower
50s.
.FRIDAY...Partly cloudy. Highs in the mid 60s to lower 70s.

$$

MTZ003-191000-
Flathead/Mission Valleys-
Including the cities of Kalispell, Polson, and St. Ignatius
1222 PM MDT Fri Sep 18 2026

.TONIGHT...Mostly cloudy. Patchy fog late in the night. Lows in
the mid 40s to lower 50s.
.SATURDAY...Mostly sunny. Patchy fog in the morning. Highs in the
70s.
.SATURDAY NIGHT...Partly cloudy. Lows in the 40s to lower 50s.
.SUNDAY...Mostly sunny. Highs in the 70s.
.SUNDAY NIGHT...Clear. Lows in the mid 40s to lower 50s.
.MONDAY...Sunny. Highs in the 70s.
.MONDAY NIGHT...Mostly clear. Lows in the mid 40s to lower 50s.
.TUESDAY...Mostly sunny. Highs in the 70s.
.TUESDAY NIGHT...Partly cloudy. Lows in the mid 40s to lower 50s.
.WEDNESDAY...Mostly sunny. Highs in the upper 60s to mid 70s.
.WEDNESDAY NIGHT...Partly cloudy. Lows in the mid 40s to lower
50s.
.THURSDAY...Partly cloudy. Highs in the 70s.
.THURSDAY NIGHT...Partly cloudy. Lows in the mid 40s to lower
50s.
.FRIDAY...Partly cloudy. Highs in the upper 60s to mid 70s.

$$

MTZ004-191000-
Lower Clark Fork Region-
Including the cities of Noxon, Thompson Falls, and Superior
1222 PM MDT Fri Sep 18 2026

.TONIGHT...Mostly cloudy. Chance of showers and thunderstorms in
the evening, then slight chance of rain showers after midnight.
Chance of precipitation 50 percent. Lows in the mid 40s to lower
50s.
.SATURDAY...Partly cloudy. A 20 percent chance of rain showers in
the afternoon. Highs in the 70s.
.SATURDAY NIGHT...Partly cloudy. Lows in the 40s to lower 50s.
.SUNDAY...Sunny. Patchy fog in the morning. Highs in the mid 70s
to lower 80s.
.SUNDAY NIGHT...Clear. Lows in the mid 40s to lower 50s.
.MONDAY...Sunny. Highs in the mid 70s to lower 80s.
.MONDAY NIGHT...Mostly clear. Lows in the mid 40s to lower 50s.
.TUESDAY...Mostly sunny. Highs in the mid 70s to lower 80s.
.TUESDAY NIGHT...Mostly clear. Lows in the mid 40s to lower 50s.
.WEDNESDAY...Mostly sunny. Highs in the 70s.
.WEDNESDAY NIGHT...Partly cloudy. Lows in the mid 40s to lower
50s.
.THURSDAY...Partly cloudy. Highs in the mid 70s to lower 80s.
.THURSDAY NIGHT...Partly cloudy. Lows in the upper 40s to mid
50s.
.FRIDAY...Partly cloudy. Highs in the 70s.

$$

MTZ005-191000-
Missoula/Bitterroot Valleys-
Including the cities of Hamilton and Darby
1222 PM MDT Fri Sep 18 2026

.TONIGHT...Rain showers likely and a chance of thunderstorms in
the evening. Chance of rain showers after midnight, then rain
showers likely late in the night. Patchy fog after midnight.
Chance of precipitation 90 percent. Lows near 50.
.SATURDAY...Rain showers likely in the morning, then slight
chance of showers and thunderstorms in the afternoon. Areas of
fog in the morning. Chance of precipitation 70 percent. Highs in
the mid 60s to lower 70s.
.SATURDAY NIGHT...Partly cloudy. Lows in the 40s.
.SUNDAY...Mostly sunny. Patchy fog in the morning. Highs in the
70s.
.SUNDAY NIGHT...Mostly clear. Lows in the mid to upper 40s.
.MONDAY...Sunny. Highs near 80.
.MONDAY NIGHT...Mostly clear. Lows in the mid 40s to lower 50s.
.TUESDAY...Mostly sunny. Highs in the mid to upper 70s.
.TUESDAY NIGHT...Mostly clear. Lows in the mid 40s to lower 50s.
.WEDNESDAY...Mostly sunny. Highs in the mid to upper 70s.
.WEDNESDAY NIGHT...Mostly clear. Lows in the mid to upper 40s.
.THURSDAY...Mostly sunny. Highs near 80.
.THURSDAY NIGHT...Partly cloudy. Lows near 50.
.FRIDAY...Partly cloudy. Highs in the mid to upper 70s.

$$

MTZ006-191000-
Bitterroot/Sapphire Mountains-
Including the city of Sula
1222 PM MDT Fri Sep 18 2026

.TONIGHT...Rain showers likely and a chance of thunderstorms
until early morning, then rain showers likely late in the night.
Patchy fog in the late evening and early morning. Areas of fog
late in the night. Chance of precipitation near 100 percent. Lows
in the 40s.
.SATURDAY...Rain showers likely in the morning, then rain showers
likely and a slight chance of thunderstorms in the afternoon.
Patchy fog in the morning. Chance of precipitation 90 percent.
Highs in the mid 50s to lower 60s.
.SATURDAY NIGHT...Mostly cloudy with a 20 percent chance of rain
showers in the evening, then partly cloudy after midnight. Patchy
fog through the night. Lows in the upper 30s to mid 40s.
.SUNDAY...Mostly sunny. Patchy fog in the morning. Highs in the
mid 60s to lower 70s.
.SUNDAY NIGHT...Mostly clear. Lows in the 40s.
.MONDAY...Sunny. Highs in the upper 60s to mid 70s.
.MONDAY NIGHT...Mostly clear. Lows in the 40s.
.TUESDAY...Mostly sunny. Highs in the upper 60s to mid 70s.
.TUESDAY NIGHT...Mostly clear. Lows in the 40s.
.WEDNESDAY...Mostly sunny. Highs in the upper 60s to mid 70s.
.WEDNESDAY NIGHT...Mostly clear. Lows in the 40s.
.THURSDAY...Mostly sunny. Highs in the 70s.
.THURSDAY NIGHT...Partly cloudy. Lows in the 40s to lower 50s.
.FRIDAY...Partly cloudy. Highs in the upper 60s to mid 70s.

$$

MTZ007-191000-
Butte/Blackfoot Region-
Including the cities of Anaconda, Deer Lodge, and Drummond
1222 PM MDT Fri Sep 18 2026

.TONIGHT...Rain showers likely. Chance of thunderstorms. Patchy
fog after midnight. Chance of precipitation near 100 percent.
Lows in the 40s.
.SATURDAY...Slight chance of thunderstorms. Rain showers likely
in the morning, then chance of rain showers in the afternoon.
Areas of fog in the morning. Chance of precipitation 90 percent.
Highs in the mid 50s to lower 60s.
.SATURDAY NIGHT...Mostly cloudy with a 20 percent chance of rain
showers in the evening, then partly cloudy after midnight. Patchy
fog after midnight. Lows in the mid 30s to lower 40s.
.SUNDAY...Partly cloudy. Patchy fog in the morning. Highs in the
mid 60s to lower 70s.
.SUNDAY NIGHT...Mostly clear. Lows in the upper 30s to mid 40s.
.MONDAY...Sunny. Highs in the upper 60s to mid 70s.
.MONDAY NIGHT...Mostly clear. Lows in the 40s.
.TUESDAY...Mostly sunny. Highs in the upper 60s to mid 70s.
.TUESDAY NIGHT...Mostly clear. Lows in the 40s.
.WEDNESDAY...Mostly sunny. Highs in the upper 60s to mid 70s.
.WEDNESDAY NIGHT...Mostly clear. Lows in the 40s.
.THURSDAY...Mostly sunny. Highs in the 70s.
.THURSDAY NIGHT...Partly cloudy. Lows in the 40s.
.FRIDAY...Partly cloudy. Highs in the 70s.

$$

MTZ043-191000-
Potomac/Seeley Lake Region-
Including the cities of East Missoula, Seeley Lake, and Clinton
1222 PM MDT Fri Sep 18 2026

.TONIGHT...Cloudy with a chance of rain showers. Chance of
thunderstorms in the evening. Patchy fog after midnight. Areas of
fog late in the night. Chance of precipitation 50 percent. Lows
in the 40s to lower 50s.
.SATURDAY...Mostly cloudy with a 50 percent chance of rain
showers. Areas of fog in the morning. Highs in the 60s to lower
70s.
.SATURDAY NIGHT...Mostly cloudy in the evening then clearing.
Patchy fog after midnight. Lows in the 40s.
.SUNDAY...Mostly sunny. Areas of fog in the morning. Highs in the
upper 60s to mid 70s.
.SUNDAY NIGHT...Clear. Lows in the 40s.
.MONDAY...Sunny. Highs in the 70s.
.MONDAY NIGHT...Mostly clear. Lows in the 40s to lower 50s.
.TUESDAY...Mostly sunny. Highs in the upper 60s to mid 70s.
.TUESDAY NIGHT...Mostly clear. Lows in the 40s to lower 50s.
.WEDNESDAY...Mostly sunny. Highs in the upper 60s to mid 70s.
.WEDNESDAY NIGHT...Mostly clear. Lows in the 40s to lower 50s.
.THURSDAY...Mostly sunny. Highs in the 70s.
.THURSDAY NIGHT...Partly cloudy. Lows in the mid 40s to lower
50s.
.FRIDAY...Partly cloudy. Highs in the upper 60s to mid 70s.

$$

IDZ009-191000-
Western Lemhi County-
Including the city of Shoup
1222 PM MDT Fri Sep 18 2026

.TONIGHT...Rain showers likely and a slight chance of
thunderstorms in the evening, then rain showers likely after
midnight. Chance of precipitation near 100 percent. Lows in the
mid 40s to lower 50s.
.SATURDAY...Rain showers likely in the morning, then chance of
rain showers and a slight chance of thunderstorms in the
afternoon. Chance of precipitation 80 percent. Highs in the mid
50s to lower 60s.
.SATURDAY NIGHT...Mostly cloudy with a 20 percent chance of rain
showers in the evening, then partly cloudy after midnight. Lows
in the mid 40s to lower 50s.
.SUNDAY...Mostly sunny. Highs in the upper 60s to mid 70s.
.SUNDAY NIGHT...Mostly clear. Lows in the mid 40s to lower 50s.
.MONDAY...Mostly sunny. Highs in the 70s.
.MONDAY NIGHT...Mostly clear. Lows in the mid 40s to lower 50s.
.TUESDAY...Mostly sunny. Highs in the 70s.
.TUESDAY NIGHT...Mostly clear. Lows in the mid 40s to lower 50s.
.WEDNESDAY...Mostly sunny. Highs in the 70s.
.WEDNESDAY NIGHT...Mostly clear. Lows in the upper 40s to mid
50s.
.THURSDAY...Mostly sunny. Highs in the 70s to lower 80s.
.THURSDAY NIGHT...Partly cloudy. Lows in the upper 40s to mid
50s.
.FRIDAY...Partly cloudy. Highs in the 70s.

$$

IDZ010-191000-
Eastern Lemhi County-
Including the cities of Salmon and Leadore
1222 PM MDT Fri Sep 18 2026

.TONIGHT...Rain showers likely and a chance of thunderstorms
until early morning, then rain showers likely late in the night.
Patchy fog late in the night. Chance of precipitation near
100 percent. Lows in the 40s to lower 50s.
.SATURDAY...Rain showers likely in the morning, then chance of
rain showers and a slight chance of thunderstorms in the
afternoon. Patchy fog in the morning. Chance of precipitation
70 percent. Highs in the mid 50s to lower 60s.
.SATURDAY NIGHT...Mostly cloudy. A 20 percent chance of rain
showers in the evening. Areas of fog after midnight. Lows in the
40s.
.SUNDAY...Partly cloudy. Areas of fog in the morning. Highs in
the mid 60s to lower 70s.
.SUNDAY NIGHT...Mostly clear. Lows in the 40s.
.MONDAY...Mostly sunny. Highs in the upper 60s to mid 70s.
.MONDAY NIGHT...Partly cloudy. Lows in the 40s to lower 50s.
.TUESDAY...Partly cloudy. Highs in the upper 60s to mid 70s.
.TUESDAY NIGHT...Mostly clear. Lows in the 40s to lower 50s.
.WEDNESDAY...Mostly sunny. Highs in the upper 60s to mid 70s.
.WEDNESDAY NIGHT...Mostly clear. Lows in the 40s to lower 50s.
.THURSDAY...Mostly sunny. Highs in the 70s.
.THURSDAY NIGHT...Partly cloudy. Lows in the mid 40s to lower
50s.
.FRIDAY...Partly cloudy. Highs in the 70s.

$$

IDZ005-191000-
Northern Clearwater Mountains-
Including the cities of Pierce and Elk River
1122 AM PDT Fri Sep 18 2026

.TONIGHT...Mostly cloudy. A 20 percent chance of rain showers
until early morning. Patchy fog late in the evening. Areas of fog
after midnight. Lows in the 40s.
.SATURDAY...Mostly sunny. Patchy fog in the morning. Highs in the
upper 60s to mid 70s.
.SATURDAY NIGHT...Mostly clear. Patchy fog through the night.
Lows in the 40s.
.SUNDAY...Sunny. Patchy fog in the morning. Highs in the 70s to
lower 80s.
.SUNDAY NIGHT...Clear. Patchy fog after midnight. Lows in the
40s.
.MONDAY...Sunny. Patchy fog in the morning. Highs in the mid 70s
to lower 80s.
.MONDAY NIGHT...Mostly clear. Lows in the 40s.
.TUESDAY...Mostly sunny. Highs in the 70s.
.TUESDAY NIGHT...Mostly clear. Lows in the 40s.
.WEDNESDAY...Mostly sunny. Highs in the upper 60s to mid 70s.
.WEDNESDAY NIGHT...Mostly clear. Lows in the upper 30s to mid
40s.
.THURSDAY...Mostly sunny. Highs in the mid 70s to lower 80s.
.THURSDAY NIGHT...Partly cloudy. Lows in the 40s.
.FRIDAY...Partly cloudy. Highs in the upper 60s to mid 70s.

$$

IDZ006-191000-
Southern Clearwater Mountains-
Including the cities of Powell, Elk City, and Dixie
1122 AM PDT Fri Sep 18 2026

.TONIGHT...Rain showers likely until early morning. Slight chance
of thunderstorms early in the evening. Chance of rain showers
late in the night. Patchy fog late in the evening. Areas of fog
after midnight. Chance of precipitation 90 percent. Lows 40 to
53.
.SATURDAY...Mostly cloudy. Chance of rain showers in the morning,
then slight chance of showers and thunderstorms in the afternoon.
Areas of fog in the morning. Chance of precipitation 50 percent.
Highs 60 to 75.
.SATURDAY NIGHT...Partly cloudy. Patchy fog. Lows 38 to 52.
.SUNDAY...Mostly sunny. Patchy fog in the morning. Highs 65 to
80.
.SUNDAY NIGHT...Clear. Lows 39 to 53.
.MONDAY...Sunny. Highs 68 to 83.
.MONDAY NIGHT...Mostly clear. Lows 40 to 54.
.TUESDAY...Mostly sunny. Highs 66 to 81.
.TUESDAY NIGHT...Mostly clear. Lows 39 to 53.
.WEDNESDAY...Mostly sunny. Highs 64 to 78.
.WEDNESDAY NIGHT...Mostly clear. Lows 39 to 53.
.THURSDAY...Mostly sunny. Highs 69 to 84.
.THURSDAY NIGHT...Partly cloudy. Lows 41 to 54.
.FRIDAY...Partly cloudy. Highs 64 to 78.

$$

IDZ007-191000-
Orofino/Grangeville Region-
Including the city of Kooskia
1122 AM PDT Fri Sep 18 2026

.TONIGHT...Mostly cloudy with a 40 percent chance of rain
showers. Lows in the upper 40s to mid 50s.
.SATURDAY...Partly cloudy in the morning then becoming sunny.
Highs 66 to 79.
.SATURDAY NIGHT...Mostly clear. Lows in the upper 40s to mid 50s.
.SUNDAY...Mostly sunny. Highs in the lower 70s to mid 80s.
.SUNDAY NIGHT...Clear. Lows in the upper 40s to mid 50s.
.MONDAY...Mostly sunny. Highs in the 70s to mid 80s.
.MONDAY NIGHT...Mostly clear. Lows in the 50s.
.TUESDAY...Mostly sunny. Highs in the 70s to lower 80s.
.TUESDAY NIGHT...Mostly clear. Lows in the upper 40s to mid 50s.
.WEDNESDAY...Mostly sunny. Highs in the 70s.
.WEDNESDAY NIGHT...Mostly clear. Lows in the upper 40s to mid
50s.
.THURSDAY...Mostly sunny. Highs in the 70s to mid 80s.
.THURSDAY NIGHT...Partly cloudy. Lows in the upper 40s to mid
50s.
.FRIDAY...Partly cloudy. Highs in the 70s.

$$

IDZ008-191000-
Lower Hells Canyon/Salmon River Region-
Including the cities of Riggins and White Bird
1122 AM PDT Fri Sep 18 2026

.TONIGHT...Chance of rain showers and a slight chance of
thunderstorms early in the evening, then rain showers likely in
the late evening and early morning. Chance of rain showers late
in the night. Chance of precipitation 70 percent. Lows in the
50s.
.SATURDAY...Mostly cloudy in the morning then clearing. Highs in
the 60s to upper 70s.
.SATURDAY NIGHT...Mostly clear. Lows in the upper 40s to mid 50s.
.SUNDAY...Sunny. Highs 74 to 87.
.SUNDAY NIGHT...Clear. Lows in the 50s.
.MONDAY...Mostly sunny. Highs in the mid 70s to upper 80s.
.MONDAY NIGHT...Mostly clear. Lows in the 50s to lower 60s.
.TUESDAY...Mostly sunny. Highs in the mid 70s to upper 80s.
.TUESDAY NIGHT...Mostly clear. Lows in the 50s.
.WEDNESDAY...Mostly sunny. Highs in the 70s to mid 80s.
.WEDNESDAY NIGHT...Mostly clear. Lows in the 50s.
.THURSDAY...Mostly sunny. Highs in the upper 70s to lower 90s.
.THURSDAY NIGHT...Partly cloudy. Lows in the mid 50s to lower
60s.
.FRIDAY...Partly cloudy. Highs in the lower 70s to mid 80s.

$$