For today and tonight:
Scattered thunderstorms will develop by early afternoon in the
mountains, foothills and Palmer Divide. Outflow boundaries from
these storms will then lead to additional thunderstorm development
along the Front Range Urban Corridor by late afternoon into the
early evening hours. With a favorable shear profile in place a few
of the storms may become severe in and near the foothills and over
the Palmer Divide. Hail up to 1.5 inches in diameter along with
wind gusts to 60 mph will be possible. Some heavy rainfall may
also occur in the foothills which could lead to some flash
flooding in the high Park and four mile burn areas.
For Sunday through Friday:
An unsettled weather pattern will remain over northeast Colorado
through the end of next week. A persistent upper ridge over the
western United States will produce northerly flow aloft over
Colorado while surface high pressure over the northern and Central
Plains keeps moist upslope low level winds in place across the
eastern Colorado plains. Daytime heating each day will be
sufficient to de-stabilize the atmosphere and produce scattered
afternoon and evening thunderstorms. Some storms may become severe
with large hail and damaging winds. Periods of heavy rain will
also result. Storms will generally follow north to south paths.
Initial storm generation each day will be in and near the
foothills, but outflow boundaries from storms will be able to
generate additional showers across the plains each evening.
Temperatures will be around seasonal normals and the rainfall will
help to ease fire weather concerns.
Spotter activation may be needed after 3 PM along the Front Range.
http://www.crh.noaa.gov/bou/