580
WGUS65 KMSO 150322
FFAMSO
URGENT - IMMEDIATE BROADCAST REQUESTED
FLOOD WATCH
NATIONAL WEATHER SERVICE MISSOULA MT
822 PM MST SUN DEC 14 2025
MTZ001-172100-
/O.NEW.KMSO.FF.A.0003.251215T0322Z-251217T2100Z/
/00000.0.DM.000000T0000Z.000000T0000Z.000000T0000Z.OO/
KOOTENAI/CABINET REGION-
822 PM MST SUN DEC 14 2025
...FLASH FLOOD WATCH FOR THE POTENTIAL FAILURE OF LOWER FLOWER CREEK
DIVERSION STRUCTURE IN EFFECT THROUGH WEDNESDAY AFTERNOON...
* WHAT...FLASH FLOODING CAUSED BY A POTENTIAL FAILURE OF THE LOWER
FLOWER CREEK DIVERSION STRUCTURE RELATED TO ADDITIONAL RAINFALL
EARLY THIS WEEK.
OFFICIALS ARE CURRENTLY WORKING TO MITIGATE THIS POTENTIAL HAZARD
BY RELEASING ADDITIONAL WATER TO TAKE PRESSURE OFF THE DIVERSION
STRUCTURE; THESE WATER FLOWS ARE EXPECTED TO STAY BELOW PEAK
LEVELS DURING THE FLOOD EVENT LAST THURSDAY.
* WHERE...LIBBY, MT.
* WHEN...THROUGH WEDNESDAY AFTERNOON.
* IMPACTS...A FAILURE OF THE DIVERSION STRUCTURE MAY RESULT IN
FLOODING OF URBAN AREAS.
* ADDITIONAL DETAILS...
- RECENT HEAVY RAIN CAUSED DAMAGE TO THE LOWER FLOWER CREEK
DIVERSION STRUCTURE. FORECAST RAINFALL HAS THE POTENTIAL TO
CAUSE ADDITIONAL DAMAGE TO THE STRUCTURE, BRINGING THE RISK
FOR UNCONTROLLED WATER RELEASED INTO THE TOWN OF LIBBY. THE
MAIN FLOWER CREEK DAM IS STABLE AND FUNCTIONING AS DESIGNED.
- HTTPS://WWW.WEATHER.GOV/MSO/HYDROLOGY
PRECAUTIONARY/PREPAREDNESS ACTIONS...
YOU SHOULD MONITOR LATER FORECASTS AND BE PREPARED TO TAKE ACTION
SHOULD FLASH FLOOD WARNINGS BE ISSUED.
PLEASE CONSULT LOCAL EMERGENCY OFFICIALS FOR SPECIFIC AREAS PRONE TO
FLOODING IF THE DIVERSION STRUCTURE FAILS.
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