Flood Potential Outlook
Issued by NWS Pocatello, ID

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Hydrologic Outlook
National Weather Service Pocatello ID
145 PM MDT Thu Apr 5 2018


...Potential for Rising Stream Levels and Sheet Flooding
Friday through Sunday...

A series of rainy disturbances will target southeastern Idaho the
next few days. The first round of valley rain and mountain snow
is expected Thursday night and Friday. The second disturbance late
Friday night and Saturday will bring widespread showers to all of
southeastern Idaho. Snow levels are expected to rise to around
9500 feet elevation ahead of a cold front that arrives early
Saturday afternoon, then falls back to near 5800 feet by Saturday
evening. Over the next three days, rain may total 1 to 2 inches in
the mountains. The warm air and rain on snow packs will increase
the rate of snow melt and runoff into local fields and streams.
Where rain and snow melt flow over frozen ground, sheet flooding is
possible. A few stream and rivers are expected to be near bank full
late Saturday night and Sunday, including The Portneuf River at
Pocatello, The Snake River near Heise and at Blackfoot. Water
temperatures will be very cold and hazardous, keep children and
pets at a safe distance away.

To minimize your risk of flooding, make sure you keep drains
open and rain gutters free. Also you can create runoff ditches to
direct flowing water. To prevent basement flooding, remove snow from
around your foundation.



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