601
FGUS75 KBYZ 241543
ESFBYZ
MTC003-009-011-017-025-037-065-067-075-087-095-097-103-107-111-
WYC033-261900-

Hydrologic Outlook
National Weather Service Billings MT
843 AM MST Mon Feb 24 2025


...Overland and Ice Jam Flooding Possible Due To Snowmelt...

A deep and wet snowpack exists across the forecast area. Up
to an inch of snow water has melted out of this snowpack over
the past few days. This still leaves 1 to 3 inches (more in
some areas such as the Wolf Mountains) of water remaining.
Continued warm temperatures forecast over the coming days
will accelerate snowmelt, releasing this water. With the ground
still frozen, water will not be able to soak in and will run
off. Water flowing overland and accumulating in low lying
areas may result in localized flooding. Water flowing into
creeks and streams will increase the potential for ice jam
development and may result in additional flooding near waterways.

Impacts...Water may accumulate near home foundations increasing
the chance of basement flooding. Plugged culverts, ditches, and
storm drains may result in water on area roadways at times. Water
flowing into creeks and streams will increase the potential for
ice jam development with additional flooding hazards. Unpaved
roads may suddenly thaw and become muddy and impassable. The
severity of the impacts will depend on how quickly the snowpack
melts, how fast the ground thaws, and any precipitation.

Preparation...While flooding is not imminent, if you have not
already done so, now is the time to move equipment and livestock
out of low lying areas, and away from waterways. Move any heavy
accumulations of snow away from structures and take steps to
prevent water from making it into basements. Clear any outside
drains of snow. Do not drive over flooded roadways as the roadbed
may be washed out. Be especially careful driving at night when
water covered roadways are less visible.

Stay tuned to the forecast for the latest temperature and
precipitation trends, along with any warnings or advisories
that may be issued. Please report any flooding to local law
enforcement and have them relay the report to the National
Weather Service.

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