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Flood Warning

Flood Warning
National Weather Service Billings MT
1136 AM MDT MON MAR 19 2018

Musselshell MT-
1136 AM MDT MON MAR 19 2018

The National Weather Service in Billings has extended the

* Flood Warning for...
  An Ice Jam in...
  Musselshell County in central Montana...

* Until 230 PM MDT Friday.

* At 930 AM MDT Monday, Musselshell County Emergency Management
  reported although the water has leveled out in the Roundup area,
  large ice jams continue along the river. A large ice jam located 4
  miles west of Roundup has pushed water on both sides of US Highway
  12 filling sloughs. A second ice jam, 1.5 miles long, was located
  5 miles east of Roundup and was causing water to back up on both
  sides of US Highway 12 near the town of Gage. A third ice jam, 3
  miles long, was located along the the Musselshell/Golden Valley
  County line. These ice jams can break up at any time, so people
  along the Musselshell River should be prepared for rapidly rising
  water. Now is the time to move equipment and livestock out of low
  lying areas and away from waterways.

* Some locations that may experience flooding include...
  Roundup, Melstone, Musselshell and Klein.


Turn around, don`t drown when encountering flooded roads. Most flood
deaths occur in vehicles.


LAT...LON 4674 10781 4671 10782 4668 10779 4660 10784
      4659 10779 4654 10780 4641 10843 4626 10878
      4628 10880 4630 10880 4632 10883 4636 10884
      4656 10826 4663 10792 4675 10787 4676 10783



Dense Fog Advisory

National Weather Service Glasgow MT
846 AM MDT Tue Mar 20 2018

...Dense Patchy Fog Should Burn Off...

Central and Southern Valley-Sheridan-Eastern Roosevelt-
Including the cities of Glasgow, Fort Peck, Hinsdale, Frazer,
Plentywood, Medicine Lake, and Culbertson
846 AM MDT Tue Mar 20 2018


The National Weather Service in Glasgow has issued a Dense Fog
Advisory, which is in effect until 11 AM MDT this morning.

* VISIBILITIES...As low as a quarter of a mile or less.

* TIMING...This morning.

* IMPACTS...Dense fog can be patchy in nature, with a sudden
  reduction in visibility in some places. Limited visibilities
  will make travel very difficult.


A Dense Fog Advisory means visibilities will frequently be
reduced to less than one quarter mile. If driving, slow down, use
your headlights, and leave plenty of distance ahead of you.



Flood Watch

Flood Watch
National Weather Service Glasgow MT
249 PM MDT Mon Mar 19 2018

.Preparing for possible flooding along the Musselshell River.

Including the cities of Winnett and Jordan
249 PM MDT Mon Mar 19 2018


The Flood Watch continues for

* The main stem Musselshell River and its tributaries along
  eastern Petroleum County and western Garfield County.

* Through Thursday morning.

* Ice jams have been reported both upstream and downstream of the
  town of Roundup.

* Those who have interests along the Musselshell River including
  livestock, hay, and equipment should consider moving them out
  of the floodplain.


A Flood Watch means there is a potential for flooding based on
current forecasts.

You should monitor later forecasts and be alert for possible
Flood Warnings. Those living in areas prone to flooding should be
prepared to take action should flooding develop.



Hazardous Weather Outlook

Hazardous Weather Outlook
National Weather Service Aberdeen SD
336 AM CDT Tue Mar 20 2018

Traverse-Big Stone-Corson-Campbell-McPherson-Brown-Marshall-
336 AM CDT Tue Mar 20 2018 /236 AM 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...Today and Tonight

Patchy fog and light snow will exist across the forecast area this
morning, but by mid day expect a few peeks of sun and temperatures
warming to around freezing. Another weak system drops across the
area later today into the evening for additional light snow and
drizzle, with some overnight fog redeveloping as well.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday

No hazardous weather is expected at this time.


Spotter activation will not be needed.



Hydrologic Outlook

Hydrologic Outlook

Hydrologic Outlook
National Weather Service Great Falls MT
351 AM MDT Tue Mar 20 2018

...Increased runoff likely once again this week across portions
of Central and Southwest Montana...

Temperatures this past weekend cooled some, which helped to slow
the rate of snowmelt to some extent. However, moderating
temperatures this week will lead to increasing snowmelt rates once
again, especially at low- and mid-elevations. In addition, there
is the potential for a decent precipitation event later this week,
especially across Southwest Montana south of Interstate 90. If
this does occur, it could enhance runoff rates locally, especially
in valley locations.

If confidence in the potential of flooding continues to increase,
Flood Watches or Advisories may be necessary, so stay tuned for
later updates. Regardless, those living in flood prone areas,
especially near fields and streams, are encouraged to prepare for
new or additional flooding through the week.

If flooding is observed, please report it to local law enforcement,
and ask them to pass it on to the National Weather Service in Great



Hydrologic Outlook

Hydrologic Outlook
National Weather Service Pocatello ID
129 PM MDT Mon Mar 19 2018

...Potential For Rising River and Stream Levels, along With Sheet
Flooding Increasing This Week..

As warmer weather returns along with gusty winds through Thursday,
snowmelt is expected to pick up across eastern Idaho. This should
increase runoff on multiple rivers and streams, although river and
stream flooding is not forecast at this time. In areas where the
ground is still frozen with existing snow cover, sheet flooding is
certainly possible. The risk for both increases Wednesday
and especially Thursday as one or more rounds of rain and snow are
anticipated. Snow levels will be quite high, rain on top of snow
could seen above 7000 feet if not closer to 8000 feet by Thursday.
While details are still left to be worked out, including
precipitation amounts, it does look to be quite wet in a 24 to 48
hour period.

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



318 PM MDT Sun Mar 18 2018

...Snow Melt Impacts Expected to Increase by Mid Week...

Warming temperatures through mid week 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 are expect to be in the 40 to 55 degree
range for many areas by Wednesday.

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 basements.

Stay tuned to the forecast 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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Page last modified: June 2, 2009
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