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FGUS75 KBYZ 271747
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MTC009-067-095-097-WYC033-281800-

Hydrologic Outlook
National Weather Service Billings MT
1147 AM MDT Mon May 27 2024


...Warm temperatures will bring increased flows in waterways...

Warm temperatures today through Wednesday will result in snowmelt in
the 6000-8000 foot range of the Beartooths/Absarokas and Northeast
Bighorn Mountains, resulting in high flows on area waterways. While
flooding is not imminent, many waterways could approach bankfull.

Snow monitoring sites in the high country showed that the snowpack
was running above average for this time of year. The snowstorm on
May 23, 2024 added more snow to the mountains, and snow in the
6000-8000 foot range will have an easier time melting out due to
warm temperatures.

High temperatures for today through Wednesday of this week will be
in the upper 50s to around 60 degrees in the mountains/foothills.
Low temperatures will remain above freezing each night in the mid
30s to mid 40s. These temperatures will increase the potential for a
rapid snowmelt this week. Smaller streams and creeks flowing out of
the mountains will experience rises first, with larger rivers in the
lower elevations seeing increased flows a few days after the hot
temperatures arrive.

Those with interests along area waterways should be prepared for high
water levels and move property and livestock away from rivers,
streams, and low lying areas. Bank erosion will make shorelines
unstable. Do not walk near streambanks as the underlying soil may be
eroded. Do not allow children to play near the water`s edge.

Runoff may fill culverts, ditches, and storm drains causing water to
flow over roadways potentially causing damage.  Do not drive over
flooded roadways, Turn Around Don`t Drown.

Recreationists in the mountains and foothills should be prepared for
changing conditions and use extra caution when near waterways. Flows
will be fast, and the water is cold. Fishing access sites may become
inundated by high water.

Stay tuned to the forecast. Please report any flooding to local law
enforcement and have them relay the report to the National Weather
Service.


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