Wyoming Spring 2007 Snowmelt Flood Potential Outlook--March Update

Snow Water Equivalents (SWEs) in the mountain snowpack across Wyoming were averaging 70-85% of average by the middle of March.

Across the state, there is a generally a LOW potential for flooding during the Spring 2007 runoff.  There are a few exceptions across the Upper Bear, Upper North Platte, and Laramie Basins--where headwater watersheds may have a LOW to MODERATE potential for snowmelt flooding.

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Note:  This forecast takes into account any available SWE data at the time of forecast preparation.  The SWEs are compared to 30-year SWE normals provided by the NRCS.  Historical SWEs from past flood events are also used in making decisions about flood potential.

A much HIGHER potential for flooding will occur during:

1)  Higher than normal temperatures occurring during snowmelt.

2)  Extended heavy rainfall occurring over a melting snowpack.



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