The National Weather Service in Riverton has issued a
* hydrologic advisory for...
an ice jam in...
central Big Horn County in central Wyoming...
* until 930 am MST Saturday
* at 926 am MST, Big Horn County emergency management reported there
were still 2 large ice jams along the Big Horn river that may
cause additional flooding. One ice jam was between basin and
Greybull. This ice jam has moved downstream about an half mile
since Thursday night. The other major ice jam is located
downstream of Greybull near the Sheep Mountain area and on Georgia
Pacific property. No major movement or changes have been
reported with that ice jam.
* There are also 2 smaller ice jams that are just upstream and
downstream of Greybull. These jams are not causing any significant
flooding in and around Greybull.
* Colder temperatures through early next week should inhibit any
significant movement of current ice jams. There also should be no
significant additional ice accumulation on the Big Horn river with
the expected temperatures through early next week.
River ice is very unpredictable, and may move and jam with little
notice. Any ice jam can cause flooding, as the ice dams the river,
causing rapid increases in river levels in a short period of time.
People living near the Big Horn river should monitor the situation
closely and be ready to move to higher ground if flooding occurs.
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