MISSOULA — The National Weather Service has issued a Flood Watch due to ice jamming for the Lemhi River near Lemhi, ID until further notice. Flood Watch for Lemhi RiverIce jams are formed as a result of long cold spells that cause portions of rivers and streams to freeze. Flood stage is 6.5’ and record flood stage is 7.2’. In addition, the Salmon River is also experiencing a large ice jam extending from roughly Maxwell Lane north through the town of North Fork. Temps will continue to remain below freezing at night keeping river ice an impact in both the Lemhi & Salmon Rivers.