Increasing moisture and instability over the Eastern Interior
will bring heavy rain showers and widely scattered thunderstorms
through Monday. The atmosphere over the holiday weekend will be
more typical of late July than the end of May. Storms that do form
today will not move quickly and may be nearly stationary, which
will allow them to drop abundant rainfall over small areas. Not
all areas will see rainfall, but creeks and streams near areas
that do see heavy rain may rise rapidly, especially in steep
terrain. By Monday, the bigger threat from these thunderstorms
will be strong outflow winds, abundant lightning, and small hail.
It is possible that the heaviest rain will fall along the Alaska
Highway between Delta Junction and Tok on Sunday night into
Monday morning. Rising freezing levels on Sunday will allow
snowmelt from high terrain above Cathedral Rapids and Sheep Creek
along the Alaska Highway to add to rainfall in those streams. This
may cause very high water in these streams along the Alaska
Highway.
Recreators should be alert for areas of heavy rainfall, lightning,
and for rapidly rising creeks and streams.