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Hazardous Weather Outlook

Hazardous Weather Outlook
National Weather Service Sioux Falls SD
441 PM CDT Tue Mar 20 2018

Charles Mix-Douglas-Hutchinson-Turner-Lincoln SD-Bon Homme-
Yankton-Clay SD-Union-
441 PM CDT Tue Mar 20 2018

This Hazardous Weather Outlook is for portions of northwest Iowa,
west central Iowa, northeast Nebraska, central South Dakota, east
central South Dakota, south central South Dakota, and southeast
South Dakota.

.DAY ONE...Tonight

Fog may be possible later tonight and into Wednesday morning.
Localized visibilities under 1 mile may be possible.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday

Rain will impact the region Friday and continue into Saturday.
Depending on temperatures as precipitation falls, accumulating
snow may be possible Friday night into Saturday. However, the
greatest risks of accumulating snow will be in Southwest Minnesota
and northern Iowa.


Spotter activation will not be needed.


Hazardous Weather Outlook...UPDATED
National Weather Service Aberdeen SD
254 PM CDT Tue Mar 20 2018

Traverse-Big Stone-Corson-Campbell-McPherson-Brown-Marshall-
254 PM CDT Tue Mar 20 2018 /154 PM MDT Tue Mar 20 2018/

This Hazardous Weather Outlook is for portions of west central
Minnesota, central South Dakota, north central South Dakota, and
northeast South Dakota.

.DAY ONE...This Afternoon and Tonight

Fog is expected overnight, possibly dense along the Missouri River
valley. Patchy drizzle or freezing drizzle is also possible across
northern parts of the state overnight. Impacts should be minimal.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday

No hazardous weather is expected at this time.


Spotter activation will not be needed.


Hydrologic Outlook


1229 PM MDT Tue Mar 20 2018

...Snow Melt Impacts to Continue through Friday...

Warming temperatures through Friday are expected to increase low
elevation snow melt. The potential for impacts from this melt will
increase as well, especially for areas east of Billings where the
snow pack is heaviest.

Water flowing overland and accumulating in low lying areas may
result in low land flooding, water flowing over roadways, and
basement flooding. Increased runoff from snowmelt moving into
creeks and streams will increase the potential for ice jam
flooding. In areas where ice jams are already occuring this could
increase flood waters or cause the ice jam to break up. Muddy
roads may strand vehicles and impede or cut off travel in some
rural areas.

The severity of these impacts will depend on the pace of the snow
melt. High temperatures Thursday and Friday are expected to be in
the lower 40s near the Dakota borders to around 60 degrees along
the Beartooth/Absaroka Foothills. Overnight lows Thursday night
across the lower elevations may stay above freezing for areas
along and west of a Sheridan to Billings line. Cooler temperatures
are anticipated this weekend, slowing the rate of snow and ice
melt. High temperatures on Saturday will be in the 40s across the
lower elevations with 30s and 40s for Sunday.

If preparations have not already been made, now is the time to
move equipment and livestock out of low lying areas, and away from
waterways. Move heavy accumulations of snow away from home
foundations, and take steps to prevent water making it into

Stay tuned to the forecast at for the
latest temperature trends. If flooding is observed, report it to
local law enforcement and ask them to pass it on to the National
Weather Service.


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