Zone Forecast Product
Issued by NWS Great Falls, MT
Issued by NWS Great Falls, MT
702
FPUS55 KTFX 182137
ZFPTFX
Zone Forecast Product for Central and Southwest Montana
National Weather Service Great Falls MT
336 PM MDT Fri Sep 18 2026
Spot temperatures and probabilities of measurable precipitation
are for tonight, Saturday, Saturday night, and Sunday.
MTZ301-191000-
East Glacier Park Region-
Including the cities of East Glacier Park, Kiowa, Babb,
Saint Mary, Marias Pass, and Logan Pass
336 PM MDT Fri Sep 18 2026
.TONIGHT...Mostly cloudy. Lows in the mid 40s. East winds up to
10 mph.
.SATURDAY...Mostly sunny. Highs 57 to 65. East winds up to
10 mph.
.SATURDAY NIGHT...Partly cloudy. Lows in the mid 40s. South winds
5 to 10 mph with gusts to around 25 mph.
.SUNDAY...Sunny. Highs 59 to 69. Southwest winds up to 10 mph.
.SUNDAY NIGHT...Clear. Lows in the mid 40s. Southwest winds 5 to
10 mph.
.MONDAY...Sunny. Highs 59 to 69.
.MONDAY NIGHT...Mostly clear. Lows in the upper 40s.
.TUESDAY THROUGH FRIDAY...Partly cloudy. Highs 55 to 68. Lows in
the upper 40s.
$$
MTZ307-191000-
Southern Rocky Mountain Front-
Including the city of Rogers Pass
336 PM MDT Fri Sep 18 2026
.TONIGHT...Cloudy. Chance of rain showers and slight chance of
thunderstorms early in the evening, then chance of rain in the
late evening and overnight. Lows in the mid 40s. Northeast winds
up to 10 mph. Chance of precipitation 50 percent.
.SATURDAY...Cloudy with chance of rain in the morning, then
partly sunny with slight chance of rain in the afternoon. Highs
53 to 59. Northeast winds up to 10 mph. Chance of rain
50 percent.
.SATURDAY NIGHT...Mostly cloudy in the evening then becoming
partly cloudy. Lows in the lower 40s. Southeast winds up to 5 mph
shifting to the southwest after midnight.
.SUNDAY...Warmer, sunny. Highs 59 to 69. West winds up to 10 mph.
.SUNDAY NIGHT...Mostly clear. Lows in the mid 40s. Southwest
winds up to 5 mph.
.MONDAY...Sunny. Highs 61 to 71.
.MONDAY NIGHT AND TUESDAY...Mostly clear. Lows in the mid 40s.
Highs 60 to 70.
.TUESDAY NIGHT...Partly cloudy. Lows in the mid 40s.
.WEDNESDAY AND WEDNESDAY NIGHT...Mostly clear. Highs 59 to 69.
Lows in the mid 40s.
.THURSDAY THROUGH FRIDAY...Partly cloudy. Highs 61 to 72. Lows in
the upper 40s.
$$
MTZ302-191000-
Northern High Plains-
Including the cities of Browning, Heart Butte, and Dupuyer
336 PM MDT Fri Sep 18 2026
.TONIGHT...Mostly cloudy. Lows in the upper 40s. Northeast winds
up to 10 mph shifting to the northwest after midnight.
.SATURDAY...Partly sunny in the morning then clearing. Highs in
the mid 60s. Northwest winds up to 5 mph shifting to the
southeast 5 to 15 mph in the afternoon.
.SATURDAY NIGHT...Partly cloudy. Lows in the mid 40s. South winds
up to 15 mph.
.SUNDAY...Sunny. Highs in the lower 70s. Southwest winds up to
10 mph.
.SUNDAY NIGHT...Mostly clear. Lows in the mid 40s. South winds up
to 10 mph.
.MONDAY...Sunny. Highs in the mid 70s.
.MONDAY NIGHT...Mostly clear. Lows in the upper 40s.
.TUESDAY THROUGH FRIDAY...Partly cloudy. Highs around 70. Lows in
the upper 40s.
$$
MTZ308-191000-
Southern High Plains-
Including the cities of Bynum, Choteau, and Pendroy
336 PM MDT Fri Sep 18 2026
.TONIGHT...Mostly cloudy. Slight chance of thunderstorms early in
the evening. Slight chance of rain in the late evening and early
morning, then chance of rain late in the night. Lows in the lower
50s. North winds up to 10 mph. Chance of precipitation
50 percent.
.SATURDAY...Mostly cloudy with a 20 percent chance of rain. Highs
in the mid 60s. North winds up to 10 mph shifting to the
northeast in the afternoon.
.SATURDAY NIGHT...Mostly cloudy in the evening then becoming
partly cloudy. Lows in the upper 40s. Southeast winds up to
10 mph shifting to the southwest after midnight.
.SUNDAY...Sunny. Highs in the lower 70s. Southwest winds up to
5 mph shifting to the southeast in the afternoon.
.SUNDAY NIGHT...Mostly clear. Lows in the upper 40s. Southeast
winds up to 10 mph shifting to the southwest after midnight.
.MONDAY THROUGH TUESDAY...Mostly clear. Highs in the mid 70s.
Lows around 50.
.TUESDAY NIGHT...Partly cloudy. Lows around 50.
.WEDNESDAY...Sunny. Highs in the mid 70s.
.WEDNESDAY NIGHT THROUGH FRIDAY...Partly cloudy. Lows in the
lower 50s. Highs in the mid 70s.
$$
MTZ303-191000-
Eastern Glacier, Western Toole, and Central Pondera-
Including the cities of Cut Bank, Ethridge, and Santa Rita
336 PM MDT Fri Sep 18 2026
.TONIGHT...Mostly cloudy. Lows in the upper 40s. North winds up
to 10 mph.
.SATURDAY...Mostly sunny. Highs in the upper 60s. Northeast winds
up to 10 mph shifting to the southeast in the afternoon.
.SATURDAY NIGHT...Partly cloudy. Lows in the mid 40s. South winds
up to 15 mph.
.SUNDAY...Sunny. Highs in the lower 70s. South winds up to
15 mph.
.SUNDAY NIGHT...Mostly clear. Lows in the mid 40s. South winds up
to 15 mph.
.MONDAY AND MONDAY NIGHT...Mostly clear. Highs in the mid 70s.
Lows in the upper 40s.
.TUESDAY AND TUESDAY NIGHT...Partly cloudy. Highs in the lower
70s. Lows in the upper 40s.
.WEDNESDAY...Sunny. Highs in the lower 70s.
.WEDNESDAY NIGHT THROUGH FRIDAY...Partly cloudy. Lows in the
upper 40s. Highs in the lower 70s.
&&
TEMPERATURE / PRECIPITATION
Cut Bank 47 67 45 73 / 0 0 0 0
$$
MTZ304-191000-
Eastern Toole and Liberty-
Including the cities of Devon, Shelby, Chester, Galata, Joplin,
Lothair, and Whitlash
336 PM MDT Fri Sep 18 2026
.TONIGHT...Mostly cloudy. Lows around 50. Northeast winds 5 to
10 mph.
.SATURDAY...Partly sunny. Highs in the upper 60s. East winds 5 to
15 mph.
.SATURDAY NIGHT...Mostly cloudy in the evening then becoming
partly cloudy. Lows in the upper 40s. Southeast winds up to
10 mph with gusts to around 25 mph.
.SUNDAY...Sunny. Highs in the lower 70s. Southeast winds up to
15 mph.
.SUNDAY NIGHT...Mostly clear. Lows in the upper 40s. Southeast
winds 5 to 15 mph.
.MONDAY THROUGH WEDNESDAY NIGHT...Mostly clear. Highs 71 to 79.
Lows in the upper 40s.
.THURSDAY THROUGH FRIDAY...Partly cloudy. Highs 71 to 77. Lows
around 50.
$$
MTZ305-191000-
Hill County-
Including the city of Havre
336 PM MDT Fri Sep 18 2026
.TONIGHT...Mostly cloudy. Lows in the upper 40s. Northeast winds
5 to 15 mph.
.SATURDAY...Mostly cloudy. Highs around 70. East winds 5 to
10 mph.
.SATURDAY NIGHT...Mostly cloudy. Lows in the upper 40s. Southeast
winds up to 10 mph.
.SUNDAY...Mostly sunny. Highs in the lower 70s. Southeast winds
up to 10 mph.
.SUNDAY NIGHT...Mostly clear. Lows in the upper 40s. Southeast
winds 5 to 15 mph.
.MONDAY THROUGH THURSDAY...Mostly clear. Highs in the upper 70s.
Lows in the upper 40s.
.THURSDAY NIGHT AND FRIDAY...Partly cloudy. Lows around 50. Highs
in the upper 70s.
&&
TEMPERATURE / PRECIPITATION
Havre 49 70 48 74 / 0 0 0 0
$$
MTZ306-191000-
Northern Blaine County-
Including the cities of Chinook, Zurich, Harlem, Hogeland,
and Fort Belknap
336 PM MDT Fri Sep 18 2026
.TONIGHT...Mostly cloudy. Lows in the upper 40s. Northeast winds
5 to 15 mph.
.SATURDAY...Mostly cloudy. Highs in the upper 60s. East winds
5 to 15 mph.
.SATURDAY NIGHT...Mostly cloudy. Lows in the upper 40s. East
winds 5 to 10 mph.
.SUNDAY...Mostly cloudy in the morning then becoming mostly
sunny. Highs in the upper 60s. Southeast winds 5 to 15 mph.
.SUNDAY NIGHT...Partly cloudy. Lows in the upper 40s. Southeast
winds 5 to 15 mph.
.MONDAY...Partly sunny in the morning then clearing. Highs in the
lower 70s.
.MONDAY NIGHT THROUGH THURSDAY...Mostly clear. Lows around 50.
Highs in the upper 70s.
.THURSDAY NIGHT AND FRIDAY...Partly cloudy. Lows in the lower
50s. Highs in the upper 70s.
$$
MTZ309-191000-
Eastern Pondera and Eastern Teton-
Including the cities of Brady, Conrad, and Ledger
336 PM MDT Fri Sep 18 2026
.TONIGHT...Mostly cloudy. Lows around 50. North winds 5 to
10 mph.
.SATURDAY...Mostly cloudy. Highs in the upper 60s. North winds
5 to 10 mph shifting to the east in the afternoon.
.SATURDAY NIGHT...Mostly cloudy. Lows in the mid 40s. South winds
up to 10 mph.
.SUNDAY...Sunny. Highs in the lower 70s. South winds up to
10 mph.
.SUNDAY NIGHT...Mostly clear. Lows in the mid 40s. Southeast
winds up to 10 mph.
.MONDAY AND MONDAY NIGHT...Mostly clear. Highs in the upper 70s.
Lows in the upper 40s.
.TUESDAY...Mostly sunny. Highs in the mid 70s.
.TUESDAY NIGHT AND WEDNESDAY...Mostly clear. Lows in the upper
40s. Highs in the upper 70s.
.WEDNESDAY NIGHT THROUGH FRIDAY...Partly cloudy. Lows in the
upper 40s. Highs in the upper 70s.
$$
MTZ310-191000-
Western and Central Chouteau County-
Including the cities of Floweree, Carter, and Fort Benton
336 PM MDT Fri Sep 18 2026
.TONIGHT...Cloudy. A 20 percent chance of rain after midnight.
Lows in the lower 50s. Northeast winds up to 10 mph.
.SATURDAY...Cloudy with a 20 percent chance of rain. Highs in the
upper 60s. Northeast winds up to 10 mph.
.SATURDAY NIGHT...Mostly cloudy. Lows around 50. Southeast winds
up to 10 mph.
.SUNDAY...Partly sunny in the morning then clearing. Highs in the
lower 70s. Southeast winds up to 10 mph.
.SUNDAY NIGHT...Mostly clear. Lows in the upper 40s. Southeast
winds 5 to 15 mph.
.MONDAY THROUGH THURSDAY...Mostly clear. Highs in the upper 70s.
Lows in the lower 50s.
.THURSDAY NIGHT AND FRIDAY...Partly cloudy. Lows in the lower
50s. Highs in the upper 70s.
$$
MTZ311-191000-
Bears Paw Mountains and Southern Blaine-
Including the city of Rocky Boy
336 PM MDT Fri Sep 18 2026
.TONIGHT...Mostly cloudy. Lows in the lower 50s. Northeast winds
5 to 15 mph.
.SATURDAY...Cloudy. A 20 percent chance of rain in the afternoon.
Highs 62 to 68. Northeast winds 5 to 15 mph.
.SATURDAY NIGHT...Cloudy. Slight chance of rain in the evening,
then chance of rain after midnight. Lows in the lower 50s. East
winds up to 10 mph. Chance of rain 50 percent.
.SUNDAY...Partly sunny. A 20 percent chance of rain in the
morning. Highs 64 to 70. Southeast winds up to 10 mph.
.SUNDAY NIGHT...Partly cloudy. Lows around 50. Southeast winds
5 to 15 mph.
.MONDAY...Mostly sunny. Highs 70 to 76.
.MONDAY NIGHT THROUGH THURSDAY...Mostly clear. Lows in the lower
50s. Highs 73 to 80.
.THURSDAY NIGHT AND FRIDAY...Partly cloudy. Lows in the mid 50s.
Highs 75 to 81.
$$
MTZ312-191000-
Cascade County below 5000ft-
Including the city of Great Falls
336 PM MDT Fri Sep 18 2026
.TONIGHT...Cloudy. Slight chance of thunderstorms early in the
evening. Slight chance of rain late in the evening, then chance
of rain after midnight. Lows in the lower 50s. Northeast winds
5 to 10 mph shifting to the north after midnight. Chance of
precipitation 50 percent.
.SATURDAY...Cloudy. Chance of rain in the morning, then slight
chance of rain in the afternoon. Highs in the mid 60s. North
winds up to 10 mph. Chance of rain 50 percent.
.SATURDAY NIGHT...Mostly cloudy. A 20 percent chance of rain in
the evening. Lows in the upper 40s. Southeast winds up to 10 mph
shifting to the south after midnight.
.SUNDAY...Mostly sunny. Highs in the lower 70s. South winds up to
5 mph.
.SUNDAY NIGHT...Mostly clear. Lows in the upper 40s. Southeast
winds up to 10 mph shifting to the south after midnight.
.MONDAY THROUGH THURSDAY...Mostly clear. Highs in the upper 70s.
Lows in the lower 50s.
.THURSDAY NIGHT AND FRIDAY...Partly cloudy. Lows in the lower
50s. Highs in the upper 70s.
&&
TEMPERATURE / PRECIPITATION
Great Falls Arpt 52 66 48 73 / 40 30 10 0
$$
MTZ313-191000-
Judith Basin County and Judith Gap-
Including the cities of Raynesford, Geyser, Stanford, Windham,
Benchland, Hobson, and Moccasin
336 PM MDT Fri Sep 18 2026
.TONIGHT...Chance of rain showers in the evening. Slight chance
of thunderstorms through the night. Rain showers after midnight.
Lows in the lower 50s. North winds up to 10 mph. Chance of
precipitation near 100 percent.
.SATURDAY...Cooler. Chance of rain in the morning, then rain
showers likely and slight chance of thunderstorms in the
afternoon. Highs in the upper 50s. North winds 5 to 10 mph with
gusts to around 25 mph. Chance of precipitation 70 percent.
.SATURDAY NIGHT...Cloudy with a 50 percent chance of rain. Lows
in the upper 40s. North winds up to 10 mph shifting to the west
after midnight.
.SUNDAY...Partly sunny. Chance of rain in the morning, then
slight chance of rain in the afternoon. Highs in the upper 60s.
Southwest winds up to 5 mph shifting to the east in the
afternoon. Chance of rain 50 percent.
.SUNDAY NIGHT...Mostly clear. Lows in the mid 40s. Southeast
winds 5 to 10 mph.
.MONDAY AND MONDAY NIGHT...Mostly clear. Highs in the mid 70s.
Lows in the upper 40s.
.TUESDAY...Mostly sunny. Highs in the mid 70s.
.TUESDAY NIGHT THROUGH THURSDAY NIGHT...Mostly clear. Lows in the
lower 50s. Highs in the upper 70s.
.FRIDAY...Mostly sunny. Highs in the upper 70s.
$$
MTZ314-191000-
Fergus County below 4500ft-
Including the cities of Hilger and Lewistown
336 PM MDT Fri Sep 18 2026
.TONIGHT...Cloudy. Slight chance of rain in the evening. Slight
chance of thunderstorms through the night. Rain showers likely
after midnight. Lows in the mid 50s. Northeast winds 5 to 10 mph.
Chance of precipitation 70 percent.
.SATURDAY...Cooler, cloudy. Chance of rain in the morning, then
rain showers likely and slight chance of thunderstorms in the
afternoon. Highs 58 to 64. Northeast winds 5 to 15 mph. Chance of
precipitation 70 percent.
.SATURDAY NIGHT...Cloudy with a 50 percent chance of rain. Lows
in the lower 50s. Northeast winds up to 10 mph.
.SUNDAY...Cloudy in the morning then becoming partly sunny. A
50 percent chance of rain. Highs 63 to 69. East winds up to
10 mph.
.SUNDAY NIGHT...Partly cloudy. Lows in the upper 40s. Southeast
winds up to 15 mph.
.MONDAY...Mostly sunny. Highs in the mid 70s.
.MONDAY NIGHT...Mostly clear. Lows in the lower 50s.
.TUESDAY AND TUESDAY NIGHT...Partly cloudy. Highs in the upper
70s. Lows in the lower 50s.
.WEDNESDAY THROUGH THURSDAY NIGHT...Mostly clear. Highs around
80. Lows in the lower 50s.
.FRIDAY...Mostly sunny. Highs around 80.
&&
TEMPERATURE / PRECIPITATION
Lewistown 50 58 48 65 / 70 70 80 40
$$
MTZ315-191000-
Upper Blackfoot and MacDonald Pass-
Including the cities of Marysville, Lincoln, Flesher Pass,
and MacDonald Pass
336 PM MDT Fri Sep 18 2026
.TONIGHT...Rain showers likely and chance of thunderstorms in the
evening, then rain showers and slight chance of thunderstorms
after midnight. Lows in the upper 40s. Northeast winds up to
10 mph. Chance of precipitation near 100 percent.
.SATURDAY...Cloudy. Rain likely in the morning, then rain showers
likely and slight chance of thunderstorms in the afternoon. Highs
53 to 59. Northeast winds up to 10 mph. Chance of precipitation
70 percent.
.SATURDAY NIGHT...Mostly cloudy. A 20 percent chance of rain in
the evening. Lows in the mid 40s. Northeast winds up to 5 mph
shifting to the west after midnight.
.SUNDAY...Warmer. Mostly sunny. Highs 61 to 69. West winds up to
5 mph.
.SUNDAY NIGHT...Mostly clear. Lows in the mid 40s. Southwest
winds up to 5 mph.
.MONDAY THROUGH THURSDAY NIGHT...Mostly clear. Highs 64 to 75.
Lows in the upper 40s.
.FRIDAY...Mostly sunny. Highs 66 to 74.
$$
MTZ316-191000-
Gates of the Mountains-
Including the cities of Canyon Creek, Wolf Creek, and Craig
336 PM MDT Fri Sep 18 2026
.TONIGHT...Rain showers likely and chance of thunderstorms in the
evening, then rain showers and slight chance of thunderstorms
after midnight. Lows in the lower 50s. Northeast winds 5 to
10 mph shifting to the northwest after midnight. Gusts up to
25 mph. Chance of precipitation near 100 percent.
.SATURDAY...Cloudy. Rain likely in the morning, then chance of
rain in the afternoon. Highs around 60. North winds 5 to 10 mph.
Chance of rain 70 percent.
.SATURDAY NIGHT...Mostly cloudy. A 20 percent chance of rain in
the evening. Lows in the upper 40s. Northeast winds up to 5 mph
shifting to the southwest after midnight.
.SUNDAY...Warmer. Mostly sunny. Highs 67 to 73. South winds up to
10 mph.
.SUNDAY NIGHT...Mostly clear. Lows in the upper 40s. South winds
up to 10 mph.
.MONDAY THROUGH THURSDAY...Mostly clear. Highs 71 to 78. Lows in
the lower 50s.
.THURSDAY NIGHT AND FRIDAY...Partly cloudy. Lows in the lower
50s. Highs 72 to 78.
$$
MTZ317-191000-
Little Belt and Highwood Mountains-
Including the cities of Monarch, Neihart, and Kings Hill Pass
336 PM MDT Fri Sep 18 2026
...FLASH FLOOD WATCH IN EFFECT THROUGH SATURDAY EVENING...
.TONIGHT...Rain showers likely and chance of thunderstorms in the
evening, then rain showers and slight chance of thunderstorms
after midnight. Some thunderstorms may produce heavy rainfall
early in the evening. Some thunderstorms may produce heavy
rainfall in the late evening and overnight. Lows 45 to 51.
Northeast winds up to 10 mph. Chance of precipitation near
100 percent.
.SATURDAY...Rain in the morning, then rain showers likely and
slight chance of thunderstorms in the afternoon. Some
thunderstorms may produce heavy rainfall in the afternoon. Highs
50 to 56. Northeast winds up to 10 mph with gusts to around
25 mph. Chance of precipitation near 100 percent.
.SATURDAY NIGHT...Cloudy with a 50 percent chance of rain. Lows
42 to 48. Northeast winds up to 10 mph shifting to the south
after midnight.
.SUNDAY...Warmer. Partly sunny with a 20 percent chance of rain.
Highs 58 to 66. Southwest winds up to 5 mph shifting to the
northwest in the afternoon.
.SUNDAY NIGHT...Mostly clear. Lows 41 to 47. South winds up to
10 mph.
.MONDAY AND MONDAY NIGHT...Mostly clear. Highs 64 to 72. Lows
45 to 51.
.TUESDAY...Mostly sunny. Highs 65 to 73.
.TUESDAY NIGHT THROUGH THURSDAY NIGHT...Mostly clear. Lows 46 to
53. Highs 65 to 75.
.FRIDAY...Mostly sunny. Highs 67 to 75.
$$
MTZ318-191000-
Snowy and Judith Mountains-
336 PM MDT Fri Sep 18 2026
.TONIGHT...Cloudy. Chance of thunderstorms in the evening, then
rain showers and slight chance of thunderstorms after midnight.
Lows in the upper 40s. Northeast winds 5 to 10 mph. Chance of
precipitation 90 percent.
.SATURDAY...Cooler. Rain showers and slight chance of
thunderstorms in the morning, then rain showers likely and slight
chance of thunderstorms in the afternoon. Highs in the lower 50s.
North winds 5 to 15 mph. Chance of precipitation 90 percent.
.SATURDAY NIGHT...Rain likely in the evening, then chance of rain
after midnight. Lows in the mid 40s. North winds up to 10 mph.
Chance of rain 70 percent.
.SUNDAY...Mostly cloudy. Rain likely in the morning, then chance
of rain in the afternoon. Highs 54 to 60. Northeast winds up to
10 mph. Chance of rain 70 percent.
.SUNDAY NIGHT...Mostly cloudy. Lows in the mid 40s. Southeast
winds up to 10 mph.
.MONDAY AND MONDAY NIGHT...Mostly clear. Highs 63 to 71. Lows in
the upper 40s.
.TUESDAY AND TUESDAY NIGHT...Partly cloudy. Highs 67 to 75. Lows
around 50.
.WEDNESDAY THROUGH THURSDAY...Mostly clear. Highs 67 to 76. Lows
around 50.
.THURSDAY NIGHT AND FRIDAY...Partly cloudy. Lows in the lower
50s. Highs 69 to 77.
$$
MTZ319-191000-
Helena Valley-
Including the city of Helena
336 PM MDT Fri Sep 18 2026
...FLOOD WATCH IN EFFECT THROUGH SATURDAY AFTERNOON...
.TONIGHT...Chance of thunderstorms in the evening. Rain showers
through the night. Slight chance of thunderstorms after midnight.
Some thunderstorms may produce heavy rainfall in the evening.
Some thunderstorms may produce heavy rainfall after midnight.
Lows in the lower 50s. Northwest winds 5 to 10 mph. Chance of
precipitation near 100 percent.
.SATURDAY...Cooler. Rain in the morning, then rain showers likely
and slight chance of thunderstorms in the afternoon. Some
thunderstorms may produce heavy rainfall in the afternoon. Highs
in the lower 60s. Northwest winds 5 to 10 mph. Chance of
precipitation near 100 percent.
.SATURDAY NIGHT...Mostly cloudy. Chance of rain in the evening,
then slight chance of rain after midnight. Patchy fog after
midnight. Lows in the upper 40s. West winds up to 5 mph. Chance
of rain 30 percent.
.SUNDAY...Warmer. Mostly sunny. Patchy fog in the morning. Highs
in the lower 70s. Light winds becoming southeast up to 5 mph in
the afternoon.
.SUNDAY NIGHT...Mostly clear. Lows in the upper 40s. South winds
up to 5 mph.
.MONDAY THROUGH THURSDAY NIGHT...Mostly clear. Highs in the upper
70s. Lows in the upper 40s.
.FRIDAY...Mostly sunny. Highs in the upper 70s.
&&
TEMPERATURE / PRECIPITATION
Helena 52 61 48 73 / 100 100 30 0
$$
MTZ320-191000-
Big Belt, Bridger and Castle Mountains-
Including the cities of Trident, Maudlow, Battle Ridge Pass,
Bozeman Pass, and Deep Creek Pass
336 PM MDT Fri Sep 18 2026
...FLASH FLOOD WATCH IN EFFECT THROUGH SATURDAY EVENING...
.TONIGHT...Rain showers and chance of thunderstorms in the
evening, then rain showers and slight chance of thunderstorms
after midnight. Some thunderstorms may produce heavy rainfall in
the evening. Some thunderstorms may produce heavy rainfall after
midnight. Lows in the upper 40s. Northeast winds up to 10 mph.
Chance of precipitation near 100 percent.
.SATURDAY...Rain showers and slight chance of thunderstorms. Some
thunderstorms may produce heavy rainfall. Near steady temperature
around 50. North winds 5 to 10 mph. Chance of precipitation near
100 percent.
.SATURDAY NIGHT...Cloudy with a 50 percent chance of rain. Lows
in the mid 40s. Northeast winds up to 10 mph shifting to the
northwest after midnight.
.SUNDAY...Warmer. Patchy fog in the morning. Mostly cloudy with a
20 percent chance of rain in the morning, then mostly sunny in
the afternoon. Highs 56 to 66. Southwest winds up to 5 mph.
.SUNDAY NIGHT...Mostly clear. Lows in the mid 40s. South winds up
to 5 mph.
.MONDAY THROUGH TUESDAY...Mostly clear. Highs 61 to 72. Lows in
the upper 40s.
.TUESDAY NIGHT...Partly cloudy. Lows in the upper 40s.
.WEDNESDAY THROUGH THURSDAY NIGHT...Mostly clear. Highs 64 to 74.
Lows in the upper 40s.
.FRIDAY...Mostly sunny. Highs 66 to 74.
$$
MTZ321-191000-
Meagher County Valleys-
Including the cities of Martinsdale, Checkerboard, Ringling,
and White Sulphur Springs
336 PM MDT Fri Sep 18 2026
...FLOOD WATCH IN EFFECT THROUGH SATURDAY AFTERNOON...
.TONIGHT...Rain showers and chance of thunderstorms in the
evening, then rain showers and slight chance of thunderstorms
after midnight. Some thunderstorms may produce heavy rainfall in
the evening. Some thunderstorms may produce heavy rainfall after
midnight. Lows in the upper 40s. Northeast winds up to 10 mph.
Chance of precipitation near 100 percent.
.SATURDAY...Cooler. Rain showers and slight chance of
thunderstorms. Some thunderstorms may produce heavy rainfall.
Highs in the mid 50s. North winds 5 to 10 mph. Chance of
precipitation near 100 percent.
.SATURDAY NIGHT...Cloudy with a 50 percent chance of rain. Patchy
fog after midnight. Lows in the mid 40s. Northwest winds up to
10 mph.
.SUNDAY...Patchy fog in the morning. Mostly cloudy with a
20 percent chance of rain in the morning, then mostly sunny in
the afternoon. Highs in the mid 60s. Southwest winds up to 5 mph.
.SUNDAY NIGHT...Partly cloudy. Lows in the lower 40s. South winds
up to 10 mph.
.MONDAY THROUGH THURSDAY NIGHT...Mostly clear. Highs in the lower
70s. Lows in the mid 40s.
.FRIDAY...Mostly sunny. Highs in the mid 70s.
$$
MTZ322-191000-
Elkhorn and Boulder Mountains-
Including the cities of Montana City, Clancy, Boulder, Corbin,
Wickes, Elk Park Pass, and Homestake Pass
336 PM MDT Fri Sep 18 2026
...FLASH FLOOD WATCH IN EFFECT THROUGH SATURDAY EVENING...
.TONIGHT...Rain showers and chance of thunderstorms until early
morning, then rain showers and slight chance of thunderstorms
late in the night. Some thunderstorms may produce heavy rainfall
until early morning. Some thunderstorms may produce heavy
rainfall late in the night. Lows 44 to 50. North winds up to
10 mph. Chance of precipitation near 100 percent.
.SATURDAY...Rain showers and slight chance of thunderstorms. Some
thunderstorms may produce heavy rainfall. Highs 49 to 55. North
winds 5 to 10 mph. Chance of precipitation near 100 percent.
.SATURDAY NIGHT...Mostly cloudy. Chance of rain in the evening,
then slight chance of rain after midnight. Lows 39 to 47.
Northwest winds up to 5 mph. Chance of rain 50 percent.
.SUNDAY...Warmer. Mostly sunny. Highs 58 to 66. West winds up to
5 mph.
.SUNDAY NIGHT...Mostly clear. Lows 40 to 46. South winds up to
10 mph.
.MONDAY THROUGH THURSDAY NIGHT...Mostly clear. Highs 63 to 74.
Lows 43 to 50.
.FRIDAY...Mostly sunny. Highs 66 to 74.
$$
MTZ323-191000-
Canyon Ferry Area-
Including the cities of Toston, Townsend, and Winston
336 PM MDT Fri Sep 18 2026
...FLOOD WATCH IN EFFECT THROUGH SATURDAY AFTERNOON...
.TONIGHT...Rain showers and chance of thunderstorms. Some
thunderstorms may produce heavy rainfall. Lows in the lower 50s.
North winds 5 to 10 mph. Chance of precipitation near
100 percent.
.SATURDAY...Cooler. Rain showers and slight chance of
thunderstorms in the morning, then rain showers likely and slight
chance of thunderstorms in the afternoon. Some thunderstorms may
produce heavy rainfall. Highs in the upper 50s. North winds 5 to
15 mph. Chance of precipitation near 100 percent.
.SATURDAY NIGHT...Mostly cloudy. Chance of rain in the evening,
then slight chance of rain after midnight. Lows in the upper 40s.
North winds up to 10 mph shifting to the south after midnight.
Chance of rain 50 percent.
.SUNDAY...Mostly sunny. Patchy fog in the morning. Highs in the
upper 60s. South winds up to 5 mph.
.SUNDAY NIGHT...Mostly clear. Lows 44 to 50. South winds up to
10 mph.
.MONDAY THROUGH THURSDAY NIGHT...Mostly clear. Highs in the mid
70s. Lows 46 to 53.
.FRIDAY...Mostly sunny. Highs in the upper 70s.
$$
MTZ324-191000-
Missouri Headwaters-
Including the cities of Harrison, Three Forks, Willow Creek,
Pony, and Whitehall
336 PM MDT Fri Sep 18 2026
.TONIGHT...Rain showers and chance of thunderstorms. Lows around
50. North winds up to 10 mph. Chance of precipitation near
100 percent.
.SATURDAY...Cooler. Rain showers and slight chance of
thunderstorms in the morning, then rain showers and chance of
thunderstorms in the afternoon. Highs in the upper 50s. North
winds up to 10 mph. Chance of precipitation near 100 percent.
.SATURDAY NIGHT...Mostly cloudy. Chance of rain in the evening,
then slight chance of rain after midnight. Patchy fog after
midnight. Lows in the upper 40s. Northwest winds up to 5 mph
shifting to the southwest after midnight. Chance of rain
50 percent.
.SUNDAY...Mostly sunny. Areas of fog in the morning. Highs in the
upper 60s. West winds up to 5 mph shifting to the southeast in
the afternoon.
.SUNDAY NIGHT...Mostly clear. Lows in the mid 40s. Southeast
winds up to 5 mph shifting to the southwest after midnight.
.MONDAY AND MONDAY NIGHT...Mostly clear. Highs in the lower 70s.
Lows in the upper 40s.
.TUESDAY AND TUESDAY NIGHT...Partly cloudy. Highs in the mid 70s.
Lows in the upper 40s.
.WEDNESDAY THROUGH THURSDAY NIGHT...Mostly clear. Highs in the
mid 70s. Lows in the upper 40s.
.FRIDAY...Mostly sunny. Highs in the upper 70s.
$$
MTZ325-191000-
Madison River Valley-
Including the cities of Cameron, Ennis, Jeffers, McAllister,
and Norris
336 PM MDT Fri Sep 18 2026
.TONIGHT...Chance of thunderstorms in the evening. Rain showers
through the night. Slight chance of thunderstorms after midnight.
Patchy fog after midnight. Lows in the upper 40s. Northwest winds
up to 10 mph. Chance of precipitation near 100 percent.
.SATURDAY...Cooler. Patchy fog in the morning. Rain showers and
slight chance of thunderstorms in the morning, then rain showers
and chance of thunderstorms in the afternoon. Highs in the mid
50s. West winds up to 5 mph shifting to the north in the
afternoon. Chance of precipitation near 100 percent.
.SATURDAY NIGHT...Cloudy. Chance of rain showers and slight
chance of thunderstorms in the evening, then chance of rain after
midnight. Patchy fog after midnight. Lows in the mid 40s.
Northwest winds up to 10 mph. Chance of precipitation 50 percent.
.SUNDAY...Warmer. Areas of fog in the morning. Mostly cloudy with
a 20 percent chance of rain in the morning, then mostly sunny in
the afternoon. Highs in the upper 60s. Southwest winds up to
5 mph shifting to the northwest in the afternoon.
.SUNDAY NIGHT...Mostly clear. Lows 40 to 46. Northeast winds up
to 5 mph shifting to the south after midnight.
.MONDAY AND MONDAY NIGHT...Mostly clear. Highs in the lower 70s.
Lows 43 to 49.
.TUESDAY AND TUESDAY NIGHT...Partly cloudy. Highs in the mid 70s.
Lows in the upper 40s.
.WEDNESDAY THROUGH THURSDAY...Mostly clear. Highs in the mid 70s.
Lows in the upper 40s.
.THURSDAY NIGHT AND FRIDAY...Partly cloudy. Lows in the upper
40s. Highs in the upper 70s.
$$
MTZ326-191000-
Gallatin Valley-
Including the cities of Bozeman and Gallatin Gateway
336 PM MDT Fri Sep 18 2026
...FLOOD WATCH IN EFFECT THROUGH SATURDAY AFTERNOON...
.TONIGHT...Rain showers and chance of thunderstorms through the
night. Patchy fog late in the night. Some thunderstorms may
produce heavy rainfall early in the evening. Some thunderstorms
may produce heavy rainfall in the late evening and overnight.
Lows around 50. South winds up to 10 mph. Chance of precipitation
near 100 percent.
.SATURDAY...Cooler. Rain showers and slight chance of
thunderstorms in the morning, then rain showers and chance of
thunderstorms in the afternoon. Some thunderstorms may produce
heavy rainfall in the morning. Some thunderstorms may produce
heavy rainfall in the afternoon. Highs in the upper 50s. West
winds up to 5 mph shifting to the north in the afternoon. Chance
of precipitation near 100 percent.
.SATURDAY NIGHT...Cloudy with a 50 percent chance of rain. Patchy
fog after midnight. Lows in the upper 40s. West winds up to 5 mph
shifting to the south after midnight.
.SUNDAY...Partly sunny. A 20 percent chance of rain in the
morning. Patchy fog in the morning. Highs in the mid 60s. Light
winds becoming northwest up to 5 mph in the afternoon.
.SUNDAY NIGHT...Mostly clear. Lows in the mid 40s. Southeast
winds up to 10 mph.
.MONDAY AND MONDAY NIGHT...Mostly clear. Highs in the lower 70s.
Lows in the upper 40s.
.TUESDAY AND TUESDAY NIGHT...Partly cloudy. Highs in the mid 70s.
Lows in the upper 40s.
.WEDNESDAY THROUGH THURSDAY NIGHT...Mostly clear. Highs in the
mid 70s. Lows in the upper 40s.
.FRIDAY...Mostly sunny. Highs in the upper 70s.
&&
TEMPERATURE / PRECIPITATION
Bozeman Airport 48 59 45 67 / 90 90 80 20
Bozeman MSU 49 57 46 65 / 90 90 80 20
$$
MTZ330-191000-
Gallatin and Madison County Mountains and Centennial Mountains-
Including the cities of Big Sky, West Yellowstone, Targhee Pass,
and Raynolds Pass
336 PM MDT Fri Sep 18 2026
.TONIGHT...Chance of thunderstorms in the evening. Rain showers
through the night. Slight chance of thunderstorms after midnight.
Patchy fog late in the night. Lows 40 to 46. Southeast winds up
to 10 mph. Chance of precipitation near 100 percent.
.SATURDAY...Rain showers and slight chance of thunderstorms in
the morning, then rain showers and chance of thunderstorms in the
afternoon. Highs 46 to 54. Southwest winds up to 5 mph shifting
to the northwest in the afternoon. Chance of precipitation near
100 percent.
.SATURDAY NIGHT...Cloudy. Chance of rain showers and slight
chance of thunderstorms in the evening, then chance of rain after
midnight. Patchy fog after midnight. Lows 38 to 44. North winds
up to 10 mph. Chance of precipitation 50 percent.
.SUNDAY...Not as cool. Patchy fog in the morning. Partly sunny
with a 20 percent chance of rain. Highs 51 to 61. Northwest winds
up to 10 mph.
.SUNDAY NIGHT...Partly cloudy. Lows 36 to 42. Northwest winds up
to 10 mph shifting to the south after midnight.
.MONDAY AND MONDAY NIGHT...Mostly clear. Highs 57 to 67. Lows
40 to 46.
.TUESDAY AND TUESDAY NIGHT...Partly cloudy. Highs 59 to 69. Lows
40 to 46.
.WEDNESDAY THROUGH THURSDAY...Mostly clear. Highs 59 to 71. Lows
40 to 46.
.THURSDAY NIGHT AND FRIDAY...Partly cloudy. Lows 42 to 48. Highs
61 to 71.
&&
TEMPERATURE / PRECIPITATION
West Yellowstone 39 54 36 62 / 80 80 50 20
$$
MTZ327-191000-
Northwest Beaverhead County-
Including the cities of Dewey, Wisdom, Wise River, Big Hole Pass,
and Chief Joseph Pass
336 PM MDT Fri Sep 18 2026
...FLASH FLOOD WATCH IN EFFECT THROUGH SATURDAY AFTERNOON...
.TONIGHT...Rain showers and chance of thunderstorms early in the
evening, then rain showers and slight chance of thunderstorms in
the late evening and overnight. Some thunderstorms may produce
heavy rainfall early in the evening. Some thunderstorms may
produce heavy rainfall in the late evening and overnight. Lows in
the lower 40s. North winds up to 10 mph. Chance of precipitation
near 100 percent.
.SATURDAY...Rain in the morning, then rain showers and slight
chance of thunderstorms in the afternoon. Some thunderstorms may
produce heavy rainfall in the afternoon. Highs 47 to 53. North
winds up to 10 mph. Chance of precipitation near 100 percent.
.SATURDAY NIGHT...Mostly cloudy. Chance of rain in the evening,
then slight chance of rain after midnight. Patchy fog after
midnight. Lows 35 to 41. North winds up to 10 mph. Chance of rain
50 percent.
.SUNDAY...Warmer. Mostly sunny. Areas of fog in the morning.
Highs 56 to 66. West winds up to 10 mph.
.SUNDAY NIGHT...Mostly clear. Lows 36 to 42. North winds up to
5 mph shifting to the south after midnight.
.MONDAY...Sunny. Highs 60 to 70.
.MONDAY NIGHT...Mostly clear. Lows 38 to 44.
.TUESDAY AND TUESDAY NIGHT...Partly cloudy. Highs 60 to 70. Lows
38 to 44.
.WEDNESDAY THROUGH THURSDAY...Mostly clear. Highs 60 to 73. Lows
38 to 44.
.THURSDAY NIGHT AND FRIDAY...Partly cloudy. Lows 40 to 46. Highs
62 to 72.
$$
MTZ328-191000-
Beaverhead and Western Madison below 6000ft-
Including the cities of Bannack, Dillon, Glen, and Waterloo
336 PM MDT Fri Sep 18 2026
.TONIGHT...Rain showers and chance of thunderstorms. Lows in the
upper 40s. North winds up to 10 mph. Chance of precipitation near
100 percent.
.SATURDAY...Rain showers and slight chance of thunderstorms in
the morning, then rain showers and chance of thunderstorms in the
afternoon. Highs in the mid 50s. North winds up to 10 mph. Chance
of precipitation near 100 percent.
.SATURDAY NIGHT...Mostly cloudy. Chance of rain showers and
slight chance of thunderstorms in the evening, then slight chance
of rain after midnight. Lows in the mid 40s. North winds up to
10 mph shifting to the west after midnight. Chance of
precipitation 50 percent.
.SUNDAY...Warmer. Mostly sunny. Patchy fog in the morning. Highs
63 to 69. West winds up to 5 mph.
.SUNDAY NIGHT...Mostly clear. Lows in the lower 40s. East winds
up to 5 mph shifting to the south after midnight.
.MONDAY AND MONDAY NIGHT...Mostly clear. Highs 69 to 75. Lows in
the mid 40s.
.TUESDAY AND TUESDAY NIGHT...Partly cloudy. Highs 70 to 76. Lows
in the mid 40s.
.WEDNESDAY THROUGH THURSDAY...Mostly clear. Highs 70 to 78. Lows
in the mid 40s.
.THURSDAY NIGHT AND FRIDAY...Partly cloudy. Lows in the upper
40s. Highs 72 to 78.
&&
TEMPERATURE / PRECIPITATION
Dillon 47 58 44 67 / 100 90 40 0
$$
MTZ329-191000-
Ruby Mountains and Southern Beaverhead Mountains-
Including the city of Monida Pass
336 PM MDT Fri Sep 18 2026
.TONIGHT...Chance of thunderstorms in the evening. Rain showers
through the night. Slight chance of thunderstorms after midnight.
Lows in the lower 40s. East winds up to 10 mph. Chance of
precipitation near 100 percent.
.SATURDAY...Rain likely in the morning, then rain showers likely
and slight chance of thunderstorms in the afternoon. Highs 48 to
54. East winds up to 10 mph shifting to the north in the
afternoon. Chance of precipitation 70 percent.
.SATURDAY NIGHT...Mostly cloudy. Chance of rain showers and
slight chance of thunderstorms in the evening, then slight chance
of rain after midnight. Lows in the lower 40s. Northwest winds up
to 10 mph. Chance of precipitation 50 percent.
.SUNDAY...Not as cool. Mostly sunny. Highs 55 to 63. Northwest
winds up to 10 mph.
.SUNDAY NIGHT...Mostly clear. Lows in the lower 40s. North winds
up to 10 mph shifting to the south after midnight.
.MONDAY...Sunny. Highs 60 to 68.
.MONDAY NIGHT THROUGH TUESDAY NIGHT...Partly cloudy. Lows in the
mid 40s. Highs 61 to 69.
.WEDNESDAY THROUGH THURSDAY...Mostly clear. Highs 62 to 72. Lows
in the mid 40s.
.THURSDAY NIGHT AND FRIDAY...Partly cloudy. Lows in the mid 40s.
Highs 64 to 72.
$$