Hazardous Weather Outlook
Issued by NWS Denver/Boulder, CO

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FLUS45 KBOU 171029
HWOBOU

Hazardous Weather Outlook
National Weather Service Denver/Boulder CO
429 AM MDT Wed May 17 2017

COZ030>051-181030-
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-
429 AM MDT Wed May 17 2017

...Potent Late Spring Storm headed towards Northern Colorado...

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

.DAY ONE...Today and Tonight

Scattered showers and thunderstorms will develop over the
mountains this afternoon and spread over the plains during the
afternoon and evening. A cold front and approaching storm system
will result in rain showers becoming widespread over the plains by
by late evening and overnight.  Snow will increase over the
mountains and Northern Foothills tonight with the snow level
lowering to around 7000 feet by Thursday morning. Snowfall tonight
will range from 3 to 9 inches, highest amounts along the
Continental Divide and higher east slopes.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday

Significant snowfall is expected over the mountains and high
foothills Thursday through Friday, especially near Rocky Mountain
National Park. Snowfall totals could be upwards of 1 to 3 feet by
Friday evening. This will cause snowpacked roads, and some
possible broken tree branches and power outages from heavy
snowload. Travel may become quite difficult with forecasted
snowfall amounts, especially over smaller less traveled roads. At
lower elevations, mainly below 6000 feet, widespread rain is
expected. A few thunderstorms are possible over the far eastern
plains during the day. Snow may lower to around 5500 feet by
Friday morning with up to 3 inches of wet slushy snow. This system
will bring temperatures that are 20 to 30 degrees below normal
for mid to late May. Temperatures will be just above freezing
Thursday night over the plains, with at or below freezing
temperatures expected Friday night along the urban corridor.

Expect warmer and drier conditions Saturday through Monday, with
another system coming out of Canada for a wetter and cooler
Tuesday.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be needed today or tonight.

$$



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