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Hi, this is Ray Nickless the Hydrologist with the National Weather Service in Missoula,
MT. Todays presentation will be on the expected
Water Supply and Flood Potential for the spring and summer of 2013.
So lets take a look at the Precipitation, Streamflows and Snowpack for the 2013 Water
Year. The 2013 Water Year started in October of
2012. After we are done reviewing the data we
will have a forecast for streamflows across western MT and north central ID.
The precipitation that has fallen since October of 2012 until now across the mountains of
western MT and north central ID has been about normal.
Some areas of northwest MT have seen above normal precipitation. The amount of water that has flowed passed
the streamgages from October through today has been average
for most of western MT with Northwest MT seeing above average flows.
The amount of water that has flowed passed the streamgages from October through today
has been average for most of north central ID.
Snowpack across western MT and north central Idaho are near normal
The temperature forecast for May of 2013 calls for Equal Chances of average, above average
or below average temperatures across most of north central ID and western MT.
The precipitation forecast for May of 2103 call for slightly below average precipitation.
The temperature forecast for May of 2013 calls for Equal Chances of average, above average
or below average temperatures across most of western MT and north central ID.
The precipitation forecast for May of 2103 call for below average precipitation.
If temperature and precipitation forecasts occur as forecast then streamflows for the
summer of 2013 across western MT and north
central
ID
will look like this. Most of northwest
MT will see average streamflows while the rest of
western MT
will see slightly below average streamflow. In north central ID the Salmon River Basin
could see slightly below average flows and the Clearwater River
Basin average flows. In Summary; expect to see
mostly average streamflow for the summer of 2013 and flood potential near average with
spring rains determining
flood locations.