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2 products issued by NWS for: 2 Miles NNW Lafayette CO
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Hazardous Weather Outlook

Hazardous Weather Outlook
National Weather Service Denver/Boulder CO
507 AM MST Mon Nov 23 2020

COZ030>051-241215-
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-
507 AM MST Mon Nov 23 2020

...Winter Weather Advisory late tonight through Tuesday morning
I-70 Mountain corridor, southern Foothills and Palmer Divide...

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

.DAY ONE...Today and Tonight

A storm system will move into the Great Basin today and then
move into Colorado tonight. Ahead of the system gusty southwest
winds over the Palmer Divide will produce elevated fire danger
this afternoon.  Meanwhile there will be a chance of showers
and possibly a few thunderstorms over the higher terrain this
afternoon.

For tonight, snow will increase in the mountains late this evening
and continue overnight. Across the plains rain will develop after
midnight and gradually change to snow late tonight.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday

Snow will continue across most of the area Tuesday morning. There
is still considerable uncertainty with regard to accumulations,
but there is higher confidence that several inches of snow will
accumulate over the I-70 Mountain Corridor, foothills west and
southwest of Denver, and the Palmer Divide. Generally lighter
snow accumulations are expected from Denver to points north and
east. The least amount of snow is expected near the Wyoming border
where only a dusting to 1 inch of snow will be possible. Travelers
should plan on slow and slippery travel conditions for the Tuesday
morning commute. Snow will then end from north to south across the
area from late Tuesday morning through the early afternoon hours.

Wednesday will be dry with seasonal temperatures, but winds will
be gusty in the Front Range mountains and foothills with gusts of
40 to 50 mph possible. Another system may affect the area
Thanksgiving with colder temperatures and a chance of light snow.
Then dry weather is expected to build back for Friday and the
weekend.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be needed.

$$



Winter Weather Advisory

URGENT - WINTER WEATHER MESSAGE
National Weather Service Denver CO
915 AM MST Mon Nov 23 2020

...SNOW DEVELOPS TONIGHT AND WILL IMPACT THE TUESDAY MORNING
COMMUTE...

.A storm system will move into the area tonight and push across the
area Tuesday morning.  Snow will develop in the mountains this
evening, and then become more widespread and heavier late tonight
and early Tuesday morning.  On the plains and Palmer Divide, rain
and snow will develop overnight, turning to all snow late tonight or
very early Tuesday morning.  Travelers should be prepared for winter
travel conditions and a slow, slippery commute Tuesday morning,
especially in the western and southwestern metro areas where upslope
flow will enhance snow amounts.

COZ039-240100-
/O.EXA.KBOU.WW.Y.0028.201124T1000Z-201124T1900Z/
Boulder And Jefferson Counties Below 6000 Feet/West Broomfield
County-
Including Boulder, Golden, Longmont, Arvada, and Lakewood
915 AM MST Mon Nov 23 2020

...WINTER WEATHER ADVISORY IN EFFECT FROM 3 AM TO NOON MST TUESDAY...

* WHAT...Snow expected. Total snow accumulations of 2 to 4 inches.

* WHERE...Boulder and the western suburbs of Denver.

* WHEN...From 3 AM to Noon MST Tuesday, however most of the
  accumulation will occur from 5 AM until 8 AM.

* IMPACTS...Plan on slippery road conditions. The hazardous
  conditions could impact the Tuesday morning commute. Roads, and
  especially bridges and overpasses, will likely become slick and
  hazardous.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. The latest road
conditions for the state you are calling from can be obtained by
calling 5 1 1.

&&

$$



U.S. Dept. of Commerce
NOAA National Weather Service
1325 East West Highway
Silver Spring, MD 20910
E-mail: w-nws.webmaster@noaa.gov
Page last modified: May 16, 2007
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