195
WGUS65 KMSO 081953
FFAMSO

URGENT - IMMEDIATE BROADCAST REQUESTED
Flood Watch
National Weather Service Missoula MT
1253 PM MST Mon Dec 8 2025

.Near-record precipitation is possible this week as two Atmospheric
Rivers will move through the region. The first one arrives today and
continues through Tuesday, followed by a second, stronger one
Tuesday night through Thursday. Between 4 and 10 inches of moderate
to heavy rain are expected in the mountains. For some locations,
near record rainfall amounts are possible. The rain, falling on the
current snowpack, combined with mild nighttime temperatures will
increase snowmelt. Flows in rivers may increase quickly and reach
critical levels.

MTC029-047-053-089-092115-
/O.EXB.KMSO.FA.A.0009.251209T0000Z-251212T0000Z/
/00000.0.RS.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Flathead-Lake-Lincoln-Sanders-
1253 PM MST Mon Dec 8 2025

...FLOOD WATCH IN EFFECT FROM 5 PM MST THIS AFTERNOON THROUGH
THURSDAY AFTERNOON...

* WHAT...Flooding caused by rain and snowmelt continues to be
  possible.

* WHERE...A portion of northwest Montana, including the following
  counties, Flathead, Lake, Lincoln and Sanders.

* WHEN...From 5 PM MST this afternoon through Thursday afternoon.

* IMPACTS...Creeks and streams may rise out of their banks. Flooding
  may occur in poor drainage and urban areas. Storm drains and
  ditches may become clogged with debris. Rockfall is possible.

* ADDITIONAL DETAILS...
  - A prolonged atmospheric river event will bring periods of
    moderate to heavy rainfall to the region. Snow levels will
    rise to 6,000 to 7,000 feet during the first moisture plume
    on Tuesday. Snow levels will fall temporarily to 3,000 to
    5,000 feet Tuesday night before rising again to 6,000 to
    9,000 feet Wednesday and Thursday. Between 4 and 10 inches of
    total precipitation will fall this week in the mountains and
    upslope regions and between 1 and 4 inches of total rainfall
    is expected in the valleys. Landslides in areas of steep
    terrain and minor flooding in urban and poor drainage areas
    are possible.
  - https://www.weather.gov/mso/hydrology

PRECAUTIONARY/PREPAREDNESS ACTIONS...

You should monitor later forecasts and be alert for possible Flood
Warnings. Those living in areas prone to flooding should be prepared
to take action should flooding develop. Monitor basements for water
intrusion. You may want to preemptively shovel snow away from your
home.

&&

$$

IDC035-049-092115-
/O.EXT.KMSO.FA.A.0009.251209T0000Z-251212T0000Z/
/00000.0.RS.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Clearwater-Idaho-
1253 PM MST Mon Dec 8 2025 /1153 AM PST Mon Dec 8 2025/

...FLOOD WATCH NOW IN EFFECT FROM 5 PM MST /4 PM PST/ THIS AFTERNOON
THROUGH THURSDAY AFTERNOON...

* WHAT...Flooding caused by rain and snowmelt continues to be
  possible.

* WHERE...Portions of central and panhandle Idaho, including the
  following counties, in central Idaho, Idaho. In panhandle Idaho,
  Clearwater.

* WHEN...From 5 PM MST  /4 PM PST/ this afternoon through Thursday
  afternoon.

* IMPACTS...Creeks and streams may rise out of their banks. Flooding
  may occur in poor drainage and urban areas. Storm drains and
  ditches may become clogged with debris. People, structures, and
  roads located below steep slopes, in canyons, and near the mouths
  of canyons may be at risk from landslides.

* ADDITIONAL DETAILS...
  - A prolonged atmospheric river is expected to bring periods of
    heavy rain to Idaho and Clearwater Counties, Monday night
    through Thursday. Rising snow levels will lead to a rain on
    snow event for elevations below 7,000 feet Monday night into
    Tuesday morning. The precipitation rates will briefly
    decrease Tuesday afternoon, before a second surge of moisture
    arrives Tuesday night into Thursday morning with snow levels
    rising to near 8,000 feet. By Thursday, significant
    precipitation totals are forecast, with 2 to 5 inches in the
    valleys and 5 to 10 inches in the mountains, with locally
    higher totals over mountain crests. Landslides in areas of
    steep terrain and minor flooding in urban and poor drainage
    areas is possible.
  - https://www.weather.gov/mso/hydrology

PRECAUTIONARY/PREPAREDNESS ACTIONS...

You should monitor later forecasts and be alert for possible Flood
Warnings. Those living in areas prone to flooding should be prepared
to take action should flooding develop. Monitor basements for water
intrusion. You may want to preemptively shovel snow away from your
home.

&&

$$

MTC061-092115-
/O.EXT.KMSO.FA.A.0009.251209T0000Z-251212T0000Z/
/00000.0.RS.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Mineral-
1253 PM MST Mon Dec 8 2025

...FLOOD WATCH NOW IN EFFECT FROM 5 PM MST THIS AFTERNOON THROUGH
THURSDAY AFTERNOON...

* WHAT...Flooding caused by rain and snowmelt continues to be
  possible.

* WHERE...A portion of west central Montana, including the following
  county, Mineral.

* WHEN...From 5 PM MST this afternoon through Thursday afternoon.

* IMPACTS...Creeks and streams may rise out of their banks. Flooding
  may occur in poor drainage and urban areas. Storm drains and
  ditches may become clogged with debris. People, structures, and
  roads located below steep slopes, in canyons, and near the mouths
  of canyons may be at risk from landslides.

* ADDITIONAL DETAILS...
  - A prolonged atmospheric river is expected to bring periods of
    heavy rain to Mineral County, Monday night through Thursday.
    Rising snow levels will lead to a rain on snow event for
    elevations below 7,000 feet Monday night into Tuesday
    morning. The precipitation rates will briefly decrease
    Tuesday afternoon, before a second surge of moisture arrives
    Tuesday night into Thursday morning with snow levels rising
    to around 8,000 feet. By Thursday, significant precipitation
    totals are forecast, with 1 to 5 inches in the valleys and 5
    to 8 inches in the mountains, with locally higher totals over
    mountain crests. Landslides in areas of steep terrain and
    minor flooding in urban and poor drainage areas is possible.
  - https://www.weather.gov/mso/hydrology

PRECAUTIONARY/PREPAREDNESS ACTIONS...

You should monitor later forecasts and be alert for possible Flood
Warnings. Those living in areas prone to flooding should be prepared
to take action should flooding develop. Monitor basements for water
intrusion. You may want to preemptively shovel snow away from your
home.

&&

$$