Flood Potential Outlook
Issued by NWS Boise, ID
FGUS75 KBOI 072334
National Weather Service Boise ID
434 PM MST Sat Jan 7 2017 /334 PM PST Sat Jan 7 2017/
...Flood Potential for the Treasure Valley and Western Magic
Warmer temperatures and low-elevation rain Sunday afternoon
through Tuesday may lead to nuisance flooding in lower valleys.
The main concern is for the Western Magic Valley and the Upper
Treasure Valley, where more rainfall is expected. Over a foot of
snow is on the ground across much of the Treasure Valley, and
nearly a foot of snow is in place across portions of the Western
Magic Valley. Runoff from rainfall along with some melting of the
snowpack could result in street flooding in urban areas, flooding
of small streams, fields, and low-lying areas. Frozen soils will
prevent runoff from soaking into the ground, and snow and ice-
clogged gutters and storm drains will contribute to the flood
potential. Forecast uncertainty remains. Confidence in when,
exactly where, and the extent of flooding that may occur is not
high at this time.
Mainstem river flooding is not anticipated. However, river ice
will need to be monitored for potential ice jams, especially
the Snake River near Weiser and the lower Weiser River.