Winter Storm Warning 7, NWS Denver/Boulder, CO

630 
WWUS45 KBOU 080015
WSWBOU

URGENT - WINTER WEATHER MESSAGE
National Weather Service Denver CO
515 PM MST Thu Mar 7 2019

...ANOTHER SIGNIFICANT SNOW EXPECTED LATE FRIDAY...

.Areas of light snow will continue overnight into Friday
morning with another 1 to 3 inches possible during that period.

Snow will increase again from north to south on Friday afternoon
and continue Friday night. There will be a slight chance of
thunderstorms as well. The snow is expected to be heavy at times.
Heavy snow is most likely around Rabbit Ears pass in the late 
afternoon and early evening, and in Summit county and around 
Berthoud Pass Friday evening. Additional snowfall for Friday 
afternoon through Saturday morning will be 5 to 12 inches.

Mountain winds gusting to 40 mph will diminish for a while this
evening, but then increase again with gusts to 60 mph over most
over the higher elevations and 80 mph over the Front Range on
Friday and Friday night.

This storm comes after the same areas received 1 to 2 feet of
snow over the last 24 hours, and 3 to 5 feet in the past week.
Numerous large avalanches have occurred causing road closures.
The avalanche danger will remain high through Saturday, and
additional avalanches are likely.

People wanting to travel in the mountains must check the latest
road closures and travel conditions. Weather conditions will be
best earlier in the day on Friday, and deteriorate later in the
day. Consider modifying your plans to avoid travel in the
mountains west of Denver late in the day Friday.

COZ031-034-080815-
/O.EXP.KBOU.WS.W.0006.000000T0000Z-190308T0000Z/
/O.CON.KBOU.WS.W.0007.190308T2100Z-190309T1300Z/
Rabbit Ears Pass-
The Mountains of Summit County, the Mosquito Range, and the
Indian Peaks-
Including the cities of East Slopes Park and Northern Gore
Ranges, Gore Pass, Rabbit Ears Pass, Berthoud Pass, Breckenridge,
East Slopes Mosquito Range, East Slopes Southern Gore Range, 
Eisenhower Tunnel, Indian Peaks, Kenosha Mountains, Mount Evans, 
Williams Fork Mountains, and Winter Park
515 PM MST Thu Mar 7 2019

...WINTER STORM WARNING REMAINS IN EFFECT FROM 2 PM FRIDAY TO
6 AM MST SATURDAY...
...WINTER STORM WARNING HAS EXPIRED...

* WHAT...Heavy snow expected. Total snow accumulations of 6 to 12
  inches expected. Winds gusting as high as 70 mph over the higher
  elevations.

* WHERE...Rabbit Ears Pass and The Mountains of Summit County, 
  the Mosquito Range, and the Indian Peaks.

* WHEN...Areas of light snow tonight, then snow will increase 
  Friday afternoon and continue overnight.

* ADDITIONAL DETAILS...Travel could be very difficult. Patchy 
  blowing snow could significantly reduce visibility. The 
  hazardous conditions could impact the morning or evening 
  commute. Very strong winds could cause extensive tree damage. 
  The cold wind chills as low as 20 below zero could cause 
  frostbite on exposed skin in as little as 30 minutes.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Storm Warning for snow means severe winter weather
conditions will make travel very hazardous or impossible. If you
must travel, keep an extra flashlight, food and water in your
vehicle in case of an emergency. 

The latest road conditions for the state you are calling from can
be obtained by calling 5 1 1.

&&

$$

COZ033-080815-
/O.EXP.KBOU.WW.Y.0017.000000T0000Z-190308T0000Z/
/O.CON.KBOU.WS.W.0007.190308T2100Z-190309T1300Z/
Rocky Mountain National Park and the Medicine Bow Range-
Including the cities of Cameron Pass, 
Laramie and Medicine Bow Mountains, Rabbit Ears Range, 
Rocky Mountain National Park, and Willow Creek Pass
515 PM MST Thu Mar 7 2019

...WINTER STORM WARNING REMAINS IN EFFECT FROM 2 PM FRIDAY TO
6 AM MST SATURDAY...
...WINTER WEATHER ADVISORY HAS EXPIRED...

* WHAT...Heavy snow expected. Total snow accumulations of 5 to 10
  inches expected. Winds gusting as high as 80 mph possible above
  timberline and exposed eastern slopes Friday night.

* WHERE...Rocky Mountain National Park and the Medicine Bow 
  Range.

* WHEN...Areas of light snow tonight then snow will increase 
  again on Friday and be heavy at times in the afternoon and 
  evening.

* ADDITIONAL DETAILS...Travel could be very difficult. Patchy 
  blowing snow could significantly reduce visibility. The 
  hazardous conditions could impact the morning or evening 
  commute. Very strong winds could cause extensive tree damage. 
  The cold wind chills as low as 20 below zero could cause 
  frostbite on exposed skin in as little as 30 minutes.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Storm Warning for snow means severe winter weather
conditions will make travel very hazardous or impossible. If you
must travel, keep an extra flashlight, food and water in your
vehicle in case of an emergency. 

The latest road conditions for the state you are calling from can
be obtained by calling 5 1 1.

&&

$$

007 
WWUS45 KBOU 080735
WSWBOU

URGENT - WINTER WEATHER MESSAGE
National Weather Service Denver CO
1235 AM MST Fri Mar 8 2019

...MORE SNOW FOR THE MOUNTAINS BEGINNING THIS AFTERNOON...

.Snow is expected to increase again this afternoon in the 
northern and central Colorado mountains and then continue 
overnight. There will be a slight chance of embedded thunderstorms
as well. Snowfall could become heavy at times. Heavy snow is most
likely around Rabbit Ears pass in the late afternoon and early 
evening, and in Summit county and around Berthoud Pass this evening.
Additional snowfall from this afternoon through Saturday morning 
will be 6 to 12 inches.

Mountain winds are expected to be light through early this
afternoon, but will increase again with gusts of 60 to 70 MPH 
over the higher elevations late this afternoon and tonight.

This storm comes after the same areas received between 1 and 2 
feet of snow Wednesday night, and 3 to 5 feet in the past week. 
Numerous large avalanches have occurred causing road closures at
times. The additional snowfall tonight will keep avalanche danger
in the high to extreme category through Saturday. Additional 
avalanches are likely over the next several days.

People wanting to travel in the mountains must check the latest
road closures and travel conditions. Weather conditions will be
best this morning, and deteriorate later this afternoon. Consider
modifying your plans to avoid travel into the mountains west of 
Denver this afternoon and evening.

COZ031-033-034-081545-
/O.CON.KBOU.WS.W.0007.190308T2100Z-190309T1300Z/
Rabbit Ears Pass-
Rocky Mountain National Park and the Medicine Bow Range-
The Mountains of Summit County, the Mosquito Range, and the
Indian Peaks-
Including the cities of East Slopes Park and Northern Gore
Ranges, Gore Pass, Rabbit Ears Pass, Cameron Pass, 
Laramie and Medicine Bow Mountains, Rabbit Ears Range, 
Rocky Mountain National Park, Willow Creek Pass, Berthoud Pass, 
Breckenridge, East Slopes Mosquito Range, 
East Slopes Southern Gore Range, Eisenhower Tunnel, Indian Peaks,
Kenosha Mountains, Mount Evans, Williams Fork Mountains, 
and Winter Park
1235 AM MST Fri Mar 8 2019

...WINTER STORM WARNING REMAINS IN EFFECT FROM 2 PM THIS
AFTERNOON TO 6 AM MST SATURDAY...

* WHAT...Heavy snow expected. Total snow accumulations of 6 to 12
  inches expected. Embedded thunderstorms may produce locally
  heavier snow totals. Winds gusting as high as 70 mph over the 
  higher elevations.

* WHERE...Rabbit Ears Pass and The Mountains of Summit County, 
  the Mosquito Range, and the Indian Peaks.

* WHEN...Snow will increase this afternoon and continue 
  overnight.

* ADDITIONAL DETAILS...Travel could be very difficult. Road
  closures due to hazardous road conditions and avalanche 
  mitigation activities will be possible. Patchy blowing snow 
  could significantly reduce visibility. Cold wind chills as low 
  as 20 below zero could cause frostbite on exposed skin in as 
  little as 30 minutes.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Storm Warning for snow means severe winter weather
conditions will make travel very hazardous or impossible. If you
must travel, keep an extra flashlight, food and water in your
vehicle in case of an emergency.

The latest road conditions for the state you are calling from can
be obtained by calling 5 1 1.

&&

$$

991 
WWUS45 KBOU 081212
WSWBOU

URGENT - WINTER WEATHER MESSAGE
National Weather Service Denver CO
512 AM MST Fri Mar 8 2019

...MORE SNOW TO THE MOUNTAINS THIS AFTERNOON AND TONIGHT...

.Another Pacific storm system will be moving over Colorado later
today, bringing another round of snowfall to the northern and
central mountains of Colorado. Snow is expected to begin falling
by early afternoon and then continue overnight. It will also be
possible that a few embedded thunderstorms may develop. Snowfall 
could become moderate to heavy at times. Heavy snow is most 
likely around Rabbit Ears Pass late in the afternoon and early 
evening, and in Summit County and the Berthoud Pass area this 
evening. Additional snowfall amounts of 6 to 12 inches are
expected from this storm.

Gusty winds are expected to develop during the evening and
overnight with gusts of 60 to 70 MPH over the higher elevations.
the increasing winds will cause poor visibility due to blowing and
drifting snowfall. 

This storm is the latest in a series of storms that has produced
between 3 and 5 feet of new snow over the past week. All of this
snow has caused the snowpack to become dangerously unstable with
extreme avalanche danger through much of the central mountains.
Numerous large avalanches have been occurring through the week,  
causing road closures at times. Tonight's additional snowfall 
will keep avalanche danger in the high to extreme category 
through Saturday. Additional avalanches are expected over the 
next several days.

People wanting to travel in the mountains should check the latest
road closures and travel conditions before heading out. Weather 
conditions will be best this morning, but will deteriorate later 
this afternoon and evening as snow begins to fall. Traveling into
the mountains of central Colorado tonight should only be done if 
absolutely necessary. 

COZ031-033-034-082015-
/O.CON.KBOU.WS.W.0007.190308T2100Z-190309T1300Z/
Rabbit Ears Pass-
Rocky Mountain National Park and the Medicine Bow Range-
The Mountains of Summit County, the Mosquito Range, and the
Indian Peaks-
Including the cities of East Slopes Park and Northern Gore
Ranges, Gore Pass, Rabbit Ears Pass, Cameron Pass, 
Laramie and Medicine Bow Mountains, Rabbit Ears Range, 
Rocky Mountain National Park, Willow Creek Pass, Berthoud Pass, 
Breckenridge, East Slopes Mosquito Range, 
East Slopes Southern Gore Range, Eisenhower Tunnel, Indian Peaks,
Kenosha Mountains, Mount Evans, Williams Fork Mountains, 
and Winter Park
512 AM MST Fri Mar 8 2019

...WINTER STORM WARNING REMAINS IN EFFECT FROM 2 PM THIS
AFTERNOON TO 6 AM MST SATURDAY...

* WHAT...Moderate to heavy snow expected. Total snow accumulations
  of 4 to 10 inches, except up to 12 inches near embedded
  thunderstorm activity. Winds gusting as high as 70 mph later
  tonight.

* WHERE...The Mountains of Summit County, the Mosquito Range, and
  the Indian Peaks, Rocky Mountain National Park, the Medicine 
  Bow Range and Rabbit Ears Pass.

* WHEN...From 2 PM this afternoon to 6 AM MST Saturday.

* ADDITIONAL DETAILS...Travel could be very difficult. Areas of
  blowing snow could significantly reduce visibility. The
  hazardous conditions could impact the evening and morning travel
  times. Cold wind chills as low as 20 below zero could cause 
  frostbite on exposed skin in as little as 30 minutes.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Storm Warning for snow means severe winter weather
conditions will make travel very hazardous or impossible. If you
must travel, keep an extra flashlight, food and water in your
vehicle in case of an emergency. 

The latest road conditions can be obtained by calling 5 1 1.

&&

$$

198 
WWUS45 KBOU 081523
WSWBOU

URGENT - WINTER WEATHER MESSAGE
National Weather Service Denver CO
823 AM MST Fri Mar 8 2019

...MORE SNOW TO THE MOUNTAINS THIS AFTERNOON AND TONIGHT...

.Another Pacific storm system will be moving over Colorado later
today, bringing another round of snowfall to the northern and
central mountains of Colorado. Snow is increase this morning and
become widespread this afternoon. The snow will then continue 
overnight. A few embedded thunderstorms may develop. Snowfall 
could become moderate to heavy at times. Heavy snow is most likely
around Rabbit Ears Pass late in the afternoon and early evening, 
and in Summit County and the Berthoud Pass area this evening. 
Additional snowfall amounts of 6 to 12 inches are expected from 
this storm.

Gusty winds are expected to develop during the evening and
overnight with gusts of 60 to 70 MPH over the higher elevations.
the increasing winds will cause poor visibility due to blowing
and drifting snowfall.

This storm is the latest in a series of storms that has produced
between 3 and 5 feet of new snow over the past week. All of this
snow has caused the snowpack to become dangerously unstable with
extreme avalanche danger through much of the central mountains.
Numerous large avalanches have been occurring through the week,
causing road closures at times. Tonight's additional snowfall
will keep avalanche danger in the high category through Saturday.
Additional avalanches are expected over the next several days.

People wanting to travel in the mountains should check the latest
road closures and travel conditions before heading out. Weather
conditions will be best this morning, but will deteriorate later
this afternoon and evening as snow begins to fall. Traveling into
the mountains of central Colorado tonight should only be done if
absolutely necessary.

COZ031-033-034-090000-
/O.EXT.KBOU.WS.W.0007.190308T1800Z-190309T1300Z/
Rabbit Ears Pass-
Rocky Mountain National Park and the Medicine Bow Range-
The Mountains of Summit County, the Mosquito Range, and the
Indian Peaks-
Including the cities of East Slopes Park and Northern Gore
Ranges, Gore Pass, Rabbit Ears Pass, Cameron Pass, 
Laramie and Medicine Bow Mountains, Rabbit Ears Range, 
Rocky Mountain National Park, Willow Creek Pass, Berthoud Pass, 
Breckenridge, East Slopes Mosquito Range, 
East Slopes Southern Gore Range, Eisenhower Tunnel, Indian Peaks,
Kenosha Mountains, Mount Evans, Williams Fork Mountains, 
and Winter Park
823 AM MST Fri Mar 8 2019

...WINTER STORM WARNING NOW IN EFFECT UNTIL 6 AM MST SATURDAY...

* WHAT...Moderate to heavy snow expected. Total snow accumulations
  of 6 to 12 inches, except up to 15 inches near embedded 
  thunderstorm activity. Winds gusting as high as 70 mph later 
  tonight.

* WHERE...The Mountains of Summit County, the Mosquito Range, 
  and the Indian Peaks, Rocky Mountain National Park, the 
  Medicine Bow Range and Rabbit Ears Pass.

* WHEN...Until 6 AM MST Saturday.

* ADDITIONAL DETAILS...Travel could be very difficult. Areas of 
  blowing snow could significantly reduce visibility. The 
  hazardous conditions could impact the evening and morning 
  travel times. Cold wind chills as low as 20 below zero could 
  cause frostbite on exposed skin in as little as 30 minutes.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Storm Warning for snow means severe winter weather
conditions will make travel very hazardous or impossible. If you
must travel, keep an extra flashlight, food and water in your
vehicle in case of an emergency.

The latest road conditions can be obtained by calling 5 1 1.

&&

$$

116 
WWUS45 KBOU 082240
WSWBOU

URGENT - WINTER WEATHER MESSAGE
National Weather Service Denver CO
340 PM MST Fri Mar 8 2019

...MORE SNOW FOR THE MOUNTAINS THIS AFTERNOON AND TONIGHT...

.Another Pacific storm system will be bringing another round of 
snowfall to the northern and central mountains of Colorado late
this afternoon into tonight. Widespread snow will increase in
intensity over the next few hours then continue overnight. A few 
embedded thunderstorms may develop allowing snowfall to become 
moderate to heavy at times. Heavy snow is most likely around 
Rabbit Ears Pass late this afternoon pushing south into the 
Summit County and the Berthoud Pass area by this evening. 
Additional snowfall amounts of 6 to 12 inches are expected from 
this storm, with up to 18 inches if a thunderstorm develops.

Gusty winds will develop during the evening and overnight with 
gusts of 60 to 75 MPH over the higher elevations. These winds 
will cause poor visibility due to blowing and drifting snowfall.

This storm is the latest in a series of storms that has produced
between 3 and 5 feet of new snow over the past week. All of this
snow has caused the snowpack to become dangerously unstable with
extreme avalanche danger through much of the central mountains.
Numerous large avalanches have been occurring through the week,
causing road closures at times. Tonight's additional snowfall
and wind loading will keep avalanche danger in the high category 
through Saturday. Additional avalanches are expected over the next
several days.

People wanting to travel in the mountains should check the latest
road closures and travel conditions via C DOT before heading out.
Weather conditions are currently deteriorating and will continue 
into this evening as the heavier snow begins to fall. Traveling 
into the mountains of central Colorado tonight should only be done
if absolutely necessary.

COZ031-033-034-090700-
/O.CON.KBOU.WS.W.0007.000000T0000Z-190309T1300Z/
Rabbit Ears Pass-
Rocky Mountain National Park and the Medicine Bow Range-
The Mountains of Summit County, the Mosquito Range, and the
Indian Peaks-
Including the cities of East Slopes Park and Northern Gore
Ranges, Gore Pass, Rabbit Ears Pass, Cameron Pass, 
Laramie and Medicine Bow Mountains, Rabbit Ears Range, 
Rocky Mountain National Park, Willow Creek Pass, Berthoud Pass, 
Breckenridge, East Slopes Mosquito Range, 
East Slopes Southern Gore Range, Eisenhower Tunnel, Indian Peaks,
Kenosha Mountains, Mount Evans, Williams Fork Mountains, 
and Winter Park
340 PM MST Fri Mar 8 2019

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 6 AM MST
SATURDAY...

* WHAT...Moderate to heavy snow. Additional snow accumulations of
  5 to 10 inches, except up to 15 inches near embedded
  thunderstorm activity. Winds gusting as high as 60 mph later
  tonight, with gusts as high as 75 mph east of the Continental
  Divide down into the foothills.

* WHERE...The Mountains of Summit County, the Mosquito Range, 
  and the Indian Peaks, Rocky Mountain National Park and the 
  Medicine Bow Range and Rabbit Ears Pass.

* WHEN...Until 6 AM MST Saturday.

* ADDITIONAL DETAILS...Travel could be very difficult. Areas of
  blowing snow could significantly reduce visibility. The
  hazardous conditions could impact the evening and morning
  commute. Strong winds could cause tree damage. Wind chills as
  low as 20 below zero could cause frostbite on exposed skin in as
  little as 30 minutes. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Storm Warning for snow means severe winter weather
conditions will make travel very hazardous or impossible. If you
must travel, keep an extra flashlight, food and water in your
vehicle in case of an emergency. 

The latest road conditions for the state you are calling from can
be obtained by calling 5 1 1.

&&

$$

771 
WWUS45 KBOU 090410
WSWBOU

URGENT - WINTER WEATHER MESSAGE
National Weather Service Denver CO
910 PM MST Fri Mar 8 2019

...SNOW CONTINUES IN THE MOUNTAINS TONIGHT...

.A Pacific storm system will continue to bring periods of 
moderate to heavy snowfall to the northern and central mountains 
of Colorado tonight. Gusty winds will develop overnight with gusts
of 60 to 75 MPH over the higher elevations. These winds will 
cause poor visibility due to blowing and drifting snowfall.

This storm is the latest in a series of storms that has produced
between 3 and 5 feet of new snow over the past week. All of this
snow has caused the snowpack to become dangerously unstable with
extreme avalanche danger through much of the central mountains.
Numerous large avalanches have been occurring through the week,
causing road closures at times. Tonight's additional snowfall and
wind loading will keep avalanche danger in the high category
through Saturday. Additional avalanches are expected over the
next several days.

People wanting to travel in the mountains should check the latest
road closures and travel conditions via C DOT before heading out.
Weather conditions are currently deteriorating and will continue
into this evening as the heavier snow begins to fall. Traveling
into the mountains of central Colorado tonight should only be
done if absolutely necessary.

COZ031-033-034-091300-
/O.CON.KBOU.WS.W.0007.000000T0000Z-190309T1300Z/
Rabbit Ears Pass-
Rocky Mountain National Park and the Medicine Bow Range-
The Mountains of Summit County, the Mosquito Range, and the
Indian Peaks-
Including the cities of East Slopes Park and Northern Gore
Ranges, Gore Pass, Rabbit Ears Pass, Cameron Pass, 
Laramie and Medicine Bow Mountains, Rabbit Ears Range, 
Rocky Mountain National Park, Willow Creek Pass, Berthoud Pass, 
Breckenridge, East Slopes Mosquito Range, 
East Slopes Southern Gore Range, Eisenhower Tunnel, Indian Peaks,
Kenosha Mountains, Mount Evans, Williams Fork Mountains, 
and Winter Park
910 PM MST Fri Mar 8 2019

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 6 AM MST
SATURDAY...

* WHAT...Moderate to heavy snow. Additional snow accumulations of
  6 to 10 inches with locally higher amounts to 15 inches 
  possible. Winds gusting as high as 60 mph will develop later 
  tonight, with gusts as high as 75 mph east of the Continental 
  Divide down into the foothills.

* WHERE...The Mountains of Summit County, the Mosquito Range, 
  and the Indian Peaks, Rocky Mountain National Park and the 
  Medicine Bow Range and Rabbit Ears Pass.

* WHEN...Until 6 AM MST Saturday.

* ADDITIONAL DETAILS...Travel could be very difficult. Areas of 
  blowing snow could significantly reduce visibility. The 
  hazardous conditions could impact the evening and morning 
  commute. Strong winds could cause tree damage. Wind chills as 
  low as 20 below zero could cause frostbite on exposed skin in 
  as little as 30 minutes.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Storm Warning for snow means severe winter weather
conditions will make travel very hazardous or impossible. If you
must travel, keep an extra flashlight, food and water in your
vehicle in case of an emergency.

The latest road conditions for the state you are calling from can
be obtained by calling 5 1 1.

&&

$$

151 
WWUS45 KBOU 091255
WSWBOU

URGENT - WINTER WEATHER MESSAGE
National Weather Service Denver CO
555 AM MST Sat Mar 9 2019

...WINTER STORM WARNING EXPIRES...

COZ031-033-034-091400-
/O.EXP.KBOU.WS.W.0007.000000T0000Z-190309T1300Z/
Rabbit Ears Pass-
Rocky Mountain National Park and the Medicine Bow Range-
The Mountains of Summit County, the Mosquito Range, and the
Indian Peaks-
Including the cities of East Slopes Park and Northern Gore
Ranges, Gore Pass, Rabbit Ears Pass, Cameron Pass, 
Laramie and Medicine Bow Mountains, Rabbit Ears Range, 
Rocky Mountain National Park, Willow Creek Pass, Berthoud Pass, 
Breckenridge, East Slopes Mosquito Range, 
East Slopes Southern Gore Range, Eisenhower Tunnel, Indian Peaks,
Kenosha Mountains, Mount Evans, Williams Fork Mountains, 
and Winter Park
555 AM MST Sat Mar 9 2019

...WINTER STORM WARNING WILL EXPIRE AT 6 AM MST...

Heavy snowfall in the mountains was ending early this morning and
the winter storm warning has been allowed to expire. Wintry 
weather conditions will continue however, as light snow showers 
will be scattered over the higher terrain. In addition, roads will
be snowpacked and slippery through the day. 

Mountain avalanche danger is in the High category, rated at level
4 out of 5. Colorado's mountain back country will remain a
dangerous place. Consult the Colorado Avalanche Information 
Center for the latest conditions and forecasts.

$$

Hanson

Area Forecast Discussion
National Weather Service Denver/Boulder CO
1141 AM MST Thu Mar 7 2019

.SHORT TERM...(This afternoon through Friday)
Issued at 1133 AM MST Thu Mar 7 2019

It just keeps snowing hard in Summit county where the remnants of
last night's snow band has lingered. Meanwhile more convection has
broken out in the generally less stable air around the shortwave
trough axis over western Colorado. It looks like a healthy batch
of showers will move over Grand and Summit counties over about the
next four hours. After that it should be drying a little and also
stabilizing. Some lighter snow showers will likely continue all
night, but with much less intensity.

On the plains, the warmer and drier air is pushing off the
foothills into Denver and areas southward while the fog gradually
lifts in the cooler air over much of the northeast plains. The
showers coming off the mountains will be fighting downslope in
the westerly winds, but there could be a pocket out around Elbert
county where it will be warm enough to sustain the convection.
We'll throw in a slight chance of thunderstorms down there later
this afternoon.

.SHORT TERM...(Today and tonight)
Issued at 420 AM MST Thu Mar 7 2019

Summit County is waking up to a powder day as a persistent band of
snow developed overnight that produced 10 to 20 inches of fresh
snow. An upper level jet stream stretching over the state helped
to consolidate the moist westerly flow at mid levels into a
persistent band of snowfall that stretched from the western
Colorado border near Grand Junction to over the Denver metro area.
For awhile, the Denver area received a wintry mix of rain,
freezing rain, ice pellets and snow from the eastern end of the
band of precipitation. In the mountains, the entirety of the I-70
corridor received moderate to heavy snowfall. Radar data this
morning shows the band diminishing and starting to lose its
identity as it sags southward. However, cross sections show that
abundant moisture will still be in place over the mountains which
will continue producing light to moderate orographic snow showers
into this afternoon. Since snow will continue falling, will leave
the Winter Storm Warnings and Advisory in effect through their
expiration at 5 PM.

On the plains, areas of fog have developed after a wintry mix of
rain, freezing rain, ice pellets and snow fell last evening around
the Denver metro area. Visibilities range from a few miles down to
less than a mile at places. This fog is forecast by the HRRR to
dissipate by late in the morning. Skies will then be partly cloudy
with temperatures being held back by a continuing easterly flow
across the plains. Some warming is possible over the Denver area
as high resolution models mix some westerly winds to the surface
through the afternoon. However, it is possible that the HRRR is
overforecasting the amount of warming, so have gone with a
forecast high in the lower 50s, rather than near 60. Further east
and northeast, high temperatures will only be in the mid to upper
40s.

Tonight will be a lull in activity for the mountains as the next
surge of moisture is not expected to arrive until Friday
afternoon. Isolated to scattered mountain snow showers will be
possible, but with only light accumulations. The plains will be
dry with lows mostly in the 20s.

.LONG TERM...(Friday through Wednesday)
Issued at 420 AM MST Thu Mar 7 2019

An upper level trough in SW flow aloft will move across the area on
Fri.  This feature has decent QG ascent along with rather unstable
lapse rates and abundant moisture.  Thus expect another round of
heavy snow for mtn areas favored by southwest flow beginning by
midday and continuing into early Fri evening.

Across nern CO as the system moves across Fri evening expect a
good chc of rain/snow showers with some freezing rain possible
over the far nern plains. As for highs, readings will be in the
mid 40s to lower 50s across the plains.

As the upper level trough moves east of the area overnight the flow
aloft will become more west to northwest with rather strong
subsidence developing. Cross-sections continue to show orographic
snow in the mtns, however, lapse rates will gradually stabilize so
snow rates should decrease. Meanwhile there will be some
potential for high winds overnight into Sat morning in the
foothills as component along winds increase to 60 kts.

On Sat the flow aloft will become more westerly with still quite a
bit of moisture embedded in the flow.  Orographics will remain
favorable for some additional light snow in the mtns. Over nern
CO it will be dry with highs in the mid 30s to mid 40s. The
coldest temps will be near the WY-NE border.

For Sun the flow aloft will become more southwest as an upper level
storm system develops over California. There will still be enough
moisture embedded in the flow to keep a chc of light snow in the
mtns. Over nern CO it will remain dry with highs remaining in the
mid 30s to mid 40s.

By Mon the upper level system will move into the swrn US with the
flow aloft becoming more south to southwest.  Both the ECMWF and GFS
show abundant moisture moving north to northeast ahead of this
system so will keep in a chc of light snow in the mtns.  Across the
plains some of the moisture may affect sern portions of the plains
by Mon aftn so will keep in a chc of rain.

For Mon night thru Tue there is very little agreement between the
ECMWF and GFS.  The ECMWF ejects the system from the swrn US across
the srn Rockies with very little impact over much of the CWA.
Meanwhile the GFS has the upper level system moving northeast with a
stg closed upper level low developing over sern CO by midday Tue.
Thus this would lead to a decent storm across nern CO on Tue.
Some of the GFS Ensemble members do support this solution, and
the ECMWF solution a few days ago did show a similar result as
well. Thus can't completely rule out the GFS solution.

&&

.AVIATION...(For the 18Z TAFS through 18Z Friday afternoon)
Issued at 1133 AM MST Thu Mar 7 2019

Low clouds and fog have dissipated over the Denver area, though
some will linger nearby over the plains through at least 22z.
Winds will be a challenge today. Expecting generally west to
northwest winds at 10-20 knots for KBJC and KAPA, but uncertain
when they will reach KDEN if ever. KDEN should go to a
southwesterly drainage wind this evening.

&&

.BOU WATCHES/WARNINGS/ADVISORIES...
Winter Storm Warning until 5 PM MST this afternoon for COZ031-
034.

Winter Weather Advisory until 5 PM MST this afternoon for COZ033.

&&

UPDATE...Gimmestad
SHORT TERM...Dankers
LONG TERM...RPK
AVIATION...Gimmestad

Hazardous Weather Outlook
National Weather Service Denver/Boulder CO
1106 AM MST Thu Mar 7 2019

COZ030>051-081815-
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-
1106 AM MST Thu Mar 7 2019

...WINTER STORM WARNING NORTHERN GORE RANGE, RABBIT EARS PASS AND
THE CENTRAL COLORADO MOUNTAINS THROUGH THIS AFTERNOON...
...WINTER WEATHER ADVISORY FOR ROCKY MOUNTAIN NATIONAL PARK AND
THE INDIAN PEAKS THROUGH THIS AFTERNOON...

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

.DAY ONE...Today and Tonight

Snow shower will continue in the mountains this afternoon. The
snow will be mainly over Grand and Summit counties and the
surrounding mountains. Additional accumulations will be 2 to 4
inches with the heaviest amounts in Summit county. Areas further
north will have lighter snow. Some light snow showers will
continue overnight, with accumulations of an inch or two likely.
Winds will increase again over the higher mountains with gusts to
50 mph late tonight.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday

Another weather disturbance will move into the mountains on
Friday with more snow, which could be moderate to heavy at times
in the afternoon and evening hours. The plains will have a
chance of rain and snow showers Friday night. Gusty winds will
develop over the higher terrain Friday night and over the plains
on Saturday with potential speeds up to 60 mph possible.

Another weather system may affect the area late Monday and
Tuesday.

.SPOTTER INFORMATION STATEMENT...

Snowfall reports from spotters will be appreciated.

Gimmestad/Entrekin