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Colorado, Northwestern San Juan Mountains

Winter Storm Watch

Statement as of 8:41 AM MST on January 19, 2018

Expires 5:00 PM EST on January 21, 2018


... Winter Storm Watch in effect from Saturday afternoon through
Sunday afternoon...

* what... potentially heavy snow and blowing snow with
accumulations of a foot or more possible.

* Where... the western San Juan Mountains.

* When... late Saturday afternoon through late Sunday afternoon.

* Additional details... along with heavy snowfall, winds gusting to
35 mph may produce blowing snow and decreased visibility.

Precautionary/preparedness actions...

A Winter Storm Watch means there is a potential for significant
snow accumulations causing snowpacked and icy roads that may
impact travel. Hazardous winter driving are possible. Continue to
monitor the latest forecasts.




Special Statement

Statement as of 3:59 PM MST on January 18, 2018

Expires 2:15 PM EST on January 19, 2018


A Pacific storm is expected to move over the region beginning
late Friday night, continuing through Saturday night when the
highest precipitation rates are expected... snow then lingers over
the Colorado mountains into Sunday. Latest model guidance
indicated that the storm will arrive later than previously
predicted.

The early phase of the storm will feature warm southwesterly flow
ahead of its associated cold front. This will keep snow levels
elevated from around 7500 to 8500 feet through Saturday afternoon
limiting snowfall to the mountains.

Models are now consistent in bringing the cold front west to east
across the forecast area Saturday night. This should be the most
active period of the storm. As colder air filters into the area
behind the front expect snow levels to lower to the valley
floors.

Potential snow accumulations in the valleys are expected to be
fairly light with just 1 to 2 inches in the lower valleys and from
2 to 4 inches in the higher valleys. Potential snowfall
accumulations 6 to 12 inches are expected across the mountains
with higher accumulations for areas above 11,000 feet.

Stay tuned to NOAA Weather Radio or local media reports regarding
this developing winter storm.


Nl/dp

359 PM MST Thu Jan 18 2018

A Pacific storm is expected to move over the region beginning
late Friday night, continuing through Saturday night when the
highest precipitation rates are expected... snow then lingers over
the Colorado mountains into Sunday. Latest model guidance
indicated that the storm will arrive later than previously
predicted.

The early phase of the storm will feature warm southwesterly flow
ahead of its associated cold front. This will keep snow levels
elevated from around 7500 to 8500 feet through Saturday afternoon
limiting snowfall to the mountains.

Models are now consistent in bringing the cold front west to east
across the forecast area Saturday night. This should be the most
active period of the storm. As colder air filters into the area
behind the front expect snow levels to lower to the valley
floors.

Potential snow accumulations in the valleys are expected to be
fairly light with just 1 to 2 inches in the lower valleys and from
2 to 4 inches in the higher valleys. Potential snowfall
accumulations 6 to 12 inches are expected across the mountains
with higher accumulations for areas above 11,000 feet.

Stay tuned to NOAA Weather Radio or local media reports regarding
this developing winter storm.


Nl/dp


Weather Severe Map
Alabama - Special Statement
Alaska - Winter Weather Advisory , Blizzard Warning , Dense Fog Advisory
Arizona - Wind Advisory , Winter Weather Advisory , Air Quality Alert
Arkansas - Record Report
California - High Surf Warning , High Surf Advisory , Wind Advisory , Winter Weather Advisory , Winter Storm Warning , Beach Hazard Statement
Colorado - Winter Storm Watch , Special Statement , Public Information Statement
Connecticut - Areal Flood Warning , Flood Warning , Public Information Statement
Florida - Special Statement , Record Report , Public Information Statement
Georgia - Public Information Statement
Guam - Coastal Hazard Statement
Hawaii - High Surf Advisory , Wind Advisory
Idaho - Winter Weather Advisory , Special Statement , Record Report
Illinois - Public Information Statement
Indiana - Flood Advisory , Public Information Statement
Iowa - Winter Storm Watch , Public Information Statement , Public Information Statement
Louisiana - Storm Surge Warning, Tropical Storm Warning
Maryland - Public Information Statement
Michigan - Flood Warning , Areal Flood Advisory , Special Statement
Minnesota - Winter Storm Watch
Mississippi - Special Statement
Missouri - Public Information Statement
Montana - Winter Weather Advisory , Winter Storm Warning , Record Report
Nebraska - Areal Flood Advisory , Winter Storm Watch
Nevada - Winter Storm Warning , Winter Weather Advisory
New Mexico - Winter Storm Watch , Fire Weather Watch , Fire Weather Warning, Fire Weather Watch , Special Statement
New York - Areal Flood Warning , Public Information Statement
North Carolina - Record Report , Public Information Statement
Ohio - Public Information Statement
Oklahoma - Fire Weather Watch
Oregon - High Surf Advisory , High Wind Watch , Winter Weather Advisory
Pennsylvania - Areal Flood Warning , Areal Flood Watch , Public Information Statement
Puerto Rico - Areal Flood Advisory
South Carolina - Public Information Statement
South Dakota - Winter Storm Watch
Texas - Tropical Storm Warning , Storm Surge Watch, Tropical Storm Warning , Fire Weather Watch
Utah - Winter Storm Warning , Winter Weather Advisory , Winter Storm Watch , Special Statement , Record Report
Virginia -
Washington - High Surf Advisory , High Wind Watch
Wisconsin - Flood Warning , Winter Storm Watch
Wyoming - Winter Storm Watch , Winter Weather Advisory , Winter Storm Warning , Special Statement , Record Report , Public Information Statement , Public Information Statement

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