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Winter Weather Advisory

URGENT - WINTER WEATHER MESSAGE
National Weather Service Pocatello ID
319 AM MDT Thu Mar 30 2017


IDZ018-031-302100-
/O.CON.KPIH.WW.Y.0023.000000T0000Z-170331T0300Z/
Sawtooth Mountains-Big and Little Wood River Region-
Including the cities of Stanley, Clayton, Hailey, Ketchum,
and Bellevue
319 AM MDT Thu Mar 30 2017

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 9 PM MDT THIS
EVENING...

* IMPACTS...Snow and heavy snow will create difficult travel,
  especially for those traveling along mountain passes Thursday.
  Patches of blowing snow will create reduced visibilities.

* TIMING...Snow will begin late this morning and persist through
  this evening. By this afternoon, and continuing through the
  evening, expect wind gusts in excess of 30 mph.

* SNOW ACCUMULATIONS...8 to 12 inches.

* CONFIDENCE...Moderate confidence in snow amounts and moderate
  to low confidence in timing of events.

* LOCATIONS...Above 7500 ft, including Galena Summit, Banner
  Summit, Sawtooth Mountain Range, Big and Little Wood River
  Region.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A winter weather advisory for snow and blowing snow means that
periods of snow will cause primarily travel difficulties. Be
prepared for snow covered roads and limited visibilities, and use
caution while driving.

&&

$$




Flood Watch

Flood Watch
National Weather Service Pocatello ID
244 PM MDT Wed Mar 29 2017

IDZ017>019-022>025-031-032-301800-
/O.CON.KPIH.FA.A.0006.000000T0000Z-170401T0000Z/
/00000.0.SM.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Eastern Magic Valley-Sawtooth Mountains-Upper Snake Highlands-
South Central Highlands-Caribou Highlands-
Cache Valley/Idaho Portion-Wasatch Mountains/Idaho Portion-
Big and Little Wood River Region-Lost River/Pahsimeroi-
Including the cities of Burley, Rupert, Heyburn, Stanley,
Clayton, St. Anthony, Ashton, Island Park, Driggs, Victor,
Malad City, Oakley, Rockland, Henry, Soda Springs, Downey,
Lava Hot Springs, Preston, Montpelier, Hailey, Ketchum, Bellevue,
Arco, Challis, and Mackay
244 PM MDT Wed Mar 29 2017

...FLOOD WATCH REMAINS IN EFFECT THROUGH FRIDAY AFTERNOON...

The Flood Watch continues for

* Portions of central Idaho, eastern Idaho, south central Idaho,
  and southeast Idaho, including the following areas, in central
  Idaho, Big and Little Wood River Region, Lost
  River/Pahsimeroi, and Sawtooth Mountains. In eastern Idaho,
  Upper Snake Highlands. In south central Idaho, Eastern Magic
  Valley. In southeast Idaho, Cache Valley/Idaho Portion,
  Caribou Highlands, South Central Highlands, and Wasatch
  Mountains/Idaho Portion.

* Through Friday afternoon.

* Excessive snowmelt along with rainfall.

* Above freezing temperatures and moderate to heavy rainfall
  tonight through Friday will continue snowmelt across the watch
  area. Rain on top of snow will further increase the risk of
  runoff and flooding in lower elevations starting tonight and
  continuing through Friday.

* Water was beginning to flow over the Magic Dam spillway with
  downstream flows on the Big Wood River across Lincoln County
  expected to reach upwards of 5000 CFS around midnight tonight.
  At 5300 CFS, floodwaters will spread downstream from the
  reservoir along the Big Wood River reaching within one foot of
  Highway 75. The flooding is expected to be similar to the event
  that occurred in 2006.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Individuals living near the Big Wood River downstream of the Magic
Dam should be alert to possible flooding.

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.

&&

$$



U.S. Dept. of Commerce
NOAA National Weather Service
1325 East West Highway
Silver Spring, MD 20910
E-mail: w-nws.webmaster@noaa.gov
Page last modified: May 16, 2007
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