Flash Flood Watch
Issued by NWS Pocatello, ID

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WGUS65 KPIH 220946

Flood Watch
National Weather Service Pocatello ID
346 AM MDT Thu Mar 22 2018

...Significant snowmelt expected through Thursday...

.A strong Pacific storm is expected to bring significant
precipitation along with very warm temperatures today through
early Friday morning. Snow levels will gradually rise to 8,500
this afternoon, then fall overnight behind the passing cold front.
Heavy rainfall of half to near 1.00 inch is expected below 8,500
feet. The combination of very warm temperatures and heavy rain
will lead to flooding potential in low lying areas throughout
southeast Idaho. The main flooding potential will be on Thursday.
Increased flow on local rivers may be delayed until late tonight
and Friday.

Sawtooth Mountains-Upper Snake Highlands-South Central Highlands-
Caribou Highlands-Wasatch Mountains/Idaho Portion-
Big and Little Wood River Region-Lost River/Pahsimeroi-
Including the cities of Stanley, Clayton, St. Anthony, Ashton,
Island Park, Driggs, Victor, Malad City, Oakley, Rockland, Henry,
Soda Springs, Downey, Lava Hot Springs, Montpelier, Hailey,
Ketchum, Bellevue, Arco, Challis, and Mackay
346 AM MDT Thu Mar 22 2018


The Flood Watch continues for

* Portions of central Idaho, eastern 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
  southeast Idaho, Caribou Highlands, South Central Highlands,
  and Wasatch Mountains/Idaho Portion.

* Through late tonight

* Significant rainfall and snowmelt expected.

* Snow levels expected to rise to 8500 feet Thursday afternoon with
  rapid snowmelt below those levels expected as well as
  significant rainfall arriving late tonight. This will lead to
  excessive runoff and the potential exists for low-lying areas to
  flood along with small creeks with flooding possible on back


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.



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