Hazardous Weather Outlook
Issued by NWS Denver/Boulder, CO

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FLUS45 KBOU 201730
HWOBOU

Hazardous Weather Outlook
National Weather Service Denver/Boulder CO
1130 AM MDT Thu Apr 20 2017

COZ030>051-211730-
Jackson County Below 9000 Feet-
West Jackson and West Grand Counties Above 9000 Feet-
Grand and Summit Counties Below 9000 Feet-
South and East Jackson/Larimer/North and Northeast Grand/
Northwest Boulder Counties Above 9000 Feet-
South and Southeast Grand/West Central and Southwest Boulder/
Gilpin/Clear Creek/Summit/North and West Park Counties Above
9000 Feet-Larimer and Boulder Counties Between 6000 and 9000 Feet-
Jefferson and West Douglas Counties Above 6000 Feet/Gilpin/Clear
Creek/Northeast Park Counties Below 9000 Feet-
Central and Southeast Park County-
Larimer County Below 6000 Feet/Northwest Weld County-
Boulder And Jefferson Counties Below 6000 Feet/West Broomfield
County-
North Douglas County Below 6000 Feet/Denver/West Adams and
Arapahoe Counties/East Broomfield County-
Elbert/Central and East Douglas Counties Above 6000 Feet-
Northeast Weld County-Central and South Weld County-Morgan County-
Central and East Adams and Arapahoe Counties-
North and Northeast Elbert County Below 6000 Feet/North Lincoln
County-
Southeast Elbert County Below 6000 Feet/South Lincoln County-
Logan County-Washington County-Sedgwick County-Phillips County-
1130 AM MDT Thu Apr 20 2017

...WINTER WEATHER ADVISORY FOR THE MOUNTAINS FROM 6 PM MDT THIS
EVENING THROUGH 9 AM MDT FRIDAY...

This hazardous weather outlook is for northeast and north central
Colorado.

.DAY ONE...Today and Tonight

Rain showers and and high mountain snow will develop this
afternoon and become widespread by early evening. A few embedded
thunderstorms may bring a brief period of heavy mountain snow and
rain to the lower elevations. As cooler air moves in, the snow
level will fall to around 7000 feet by early Friday morning, and
down to near 6000 feet near the Wyoming border. Snow accumulations
of 4 to 10 inches is expected in the mountains by sunrise Friday
morning, with slushy roads and slick travel conditions expected.
Foothills locations will likely see less snowfall, with amounts of
1 to 4 inches common. Heavier amounts, closer to 3 to 6 inches
can be expected in the foothills toward the Wyoming border,
primarily north of Estes Park.

A spring storm system moving into the Northern and Central
Rockies will bring the rain and mountain snow.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday

Cooler temperatures and widespread precipitation will continue
over the mountains and plains Friday. Mountain areas may pick up a
couple more inches of snowfall. Temperatures on the plains will
remain warm enough to keep rain falling on the plains. Scattered
snow showers will continue in the mountains Friday night as rain
showers on the plains begin decreasing. Temperatures may get cool
enough on the plains early Saturday morning for some of the
lingering showers to change over to snow. However, little
accumulation is expected.

Chilly temperatures and scattered rain or snow showers are
expected through Saturday as the passing Spring storm moves
eastward onto the central plains. Warmer and drier weather are
expected Sunday and Monday as an upper ridge builds over Colorado.
Another weather disturbance is expected to be moving over Colorado
on Tuesday which will produce more snow in the mountains.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be needed today or tonight.

$$


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