Alert archive / Colorado / Winter Storm Watches in 2017

Winter Storm Watch 16, NWS Denver/Boulder, CO

November 3, 20174 counties in Colorado

NWS Denver/Boulder, CO issued this winter storm watch at Nov 3, 2017, 2:12 PM MDT for 4 counties in Colorado. It took effect at Nov 4, 2017, 6:00 PM MDT. It was in force for .

The area

The counties it named.

The facts

Issued
Nov 3, 2017, 2:12 PM MDT (20:12 UTC)
In effect from
Nov 4, 2017, 6:00 PM MDT
Expired
Nov 4, 2017, 4:46 AM MDT
In force
Issued by
NWS Denver/Boulder, CO

Counties Boulder County, CO, Grand County, CO, Jackson County, CO, Larimer County, CO

The radar

The Cheyenne radar (KCYS), 121 km from the middle of the area, began a volume at 20:09 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

What forecasters said that day

The local office's own words before this winter storm watch went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Denver/Boulder, CO wrote its last area forecast discussion before this winter storm watch went out at Nov 3, 11:09 AM MDT, 3 hours 3 minutes earlier.

Area forecast discussion, Nov 3, 11:09 AM MDT, 3 hours 3 minutes before
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Hazardous weather outlook, Nov 3, 10:57 AM MDT, 3 hours 15 minutes before
Hazardous Weather Outlook
National Weather Service Denver/Boulder CO
1057 AM MDT Fri Nov 3 2017

COZ030>051-041700-
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-
1057 AM MDT Fri Nov 3 2017

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

.DAY ONE...Today and Tonight

Fog and mist will slowly erode over the region through the morning
hours. Clouds will persist through the day with temperatures up to
20 degrees warmer than yesterday on the plains. Some gusty winds
in the mountains with speeds of 25 to 30 mph during the afternoon
hours will be possible. Later this evening light snow will begin
to develop over the higher terrain of the western slopes of the
north central mountains.

.DAYS TWO THROUGH SEVEN...Saturday through Thursday

Periods of moderate to heavy snow will develop in the higher
mountains from Saturday afternoon through Monday. The heaviest
snowfall will be possible Saturday night through Sunday in the
mountains north of Interstate 70, along west and southwest facing
slopes. Storm totals through Monday of 10 to 20 inches will be
possible.  There may be some rain mixed with snow showers in the
mountain valleys over the weekend as well.

Across the plains it will be dry with gusty winds and well above
normal temperatures on Saturday. This will lead to elevated fire
danger in the afternoon hours.  Early next week, another weather
system will bring a better chance of snow to the mountains. There
will be a chance of showers on the plains which could mix with or
turn to snow late Monday night into Tuesday.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be needed today or tonight.

Nearby

Winter Storm Watches in Colorado, 2017Every winter storm watch in 2017

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; radar from the NEXRAD Level II archive.