Alert archive / Colorado / Winter Storm Warnings in 2019

Winter Storm Warning 4, NWS Denver/Boulder, CO

February 22, 2019Elbert County, Lincoln County, Washington County, Colorado

NWS Denver/Boulder, CO issued this winter storm warning at Feb 22, 2019, 8:54 PM MST for Elbert County, Lincoln County, Washington County, Colorado. It took effect at Feb 22, 2019, 9:00 PM MST. It was in force for 13 hr. 6 reports came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued
Feb 22, 2019, 8:54 PM MST (03:54 UTC)
In effect from
Feb 22, 2019, 9:00 PM MST
Expired
Feb 23, 2019, 10:07 AM MST
In force
13 hr
Issued by
NWS Denver/Boulder, CO

Counties Elbert County, CO, Lincoln County, CO, Washington County, CO

The radar

The Denver radar (KFTG), 90 km from the middle of the area, began a volume at 03:55 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 was reported inside it

TimeReportWhereRemark
Feb 23, 6:00 AM MSTSNOW 2.8Hugo, COCOCORAHS STATION CO-LN-57, HUGO.
Feb 23, 6:30 AM MSTSNOW 31 Wnw Hugo, COCO-OP OBSERVER STATION HGOC2, 1 NW HUGO.
Feb 23, 7:00 AM MSTSNOW 32 Sse Woodlin School, COCO-OP OBSERVER STATION LNDC2, 5 WNW LINDON.
Feb 23, 7:00 AM MSTSNOW 33 Sse Woodlin School, COCOCORAHS STATION CO-WA-50, 2 SSE WOODLIN SCHOOL.
Feb 23, 7:46 AM MSTSNOW 5.51 Nw Ponderosa Park, CO
Feb 23, 8:30 AM MSTSNOW 59 Ne Ponderosa Park, CO

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Denver, CO (KDEN), launched 00:00Z, 3.9 hours before the alert went out and 60 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-pSkew-T log-p diagram, Denver, CO at 00:00Z on 2019-02-23Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2 joules per kilogram.LCLEL10008507005003002001001 km2 km3 km6 km9 km12 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Denver, CO at 00:00Z on 2019-02-23The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 255 square meters per square second.1939587897Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
2 J/kg
Mixed-layer CIN
0 J/kg
Mixed-layer LCL
568 m above ground
0-6 km bulk shear
55 kt
0-1 km storm-relative helicity
255 m²/s²
0-3 km storm-relative helicity
395 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

398 
WWUS45 KBOU 230354
WSWBOU

URGENT - WINTER WEATHER MESSAGE
National Weather Service Denver CO
854 PM MST Fri Feb 22 2019

...HEAVY SNOW OVER THE THE PLAINS OVERNIGHT...

.A winter storm will make its way across the state overnight into
Saturday. Moderate to heavy snow will end over the urban corridor
before midnight but spread across the plains ovenight. Areas of 
blowing snow and poor visibilities will develop across far eastern
portions of the plains late tonight through midday Saturday 
especially along I-70 from Limon eastward.

COZ046-047-049-231200-
/O.UPG.KBOU.WW.Y.0014.000000T0000Z-190223T1800Z/
/O.NEW.KBOU.WS.W.0004.190223T0400Z-190223T1800Z/
Limon-Southern Lincoln County-Akron-
Including the cities of Agate, Hugo, Limon, Matheson, Forder, 
Karval, Kutch, Punkin Center, Akron, Cope, Last Chance, and Otis
854 PM MST Fri Feb 22 2019

...WINTER STORM WARNING IN EFFECT UNTIL 11 AM MST SATURDAY...

* WHAT...Heavy snow expected. Total snow accumulations of 4 to 8 
  inches expected. Winds gusting as high as 50 mph with areas of 
  blowing snow late tonight into Saturday.

* WHERE...Limon, Southern Lincoln County and Akron.

* WHEN...Until 11 AM MST Saturday.

* ADDITIONAL DETAILS...Plan on slippery road conditions. Blowing
  snow could significantly reduce visibility. Gusty winds could 
  bring down tree branches.

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.

&&

$$

COZ034-230900-
/O.CON.KBOU.WW.Y.0014.000000T0000Z-190223T0900Z/
The Mountains of Summit County, the Mosquito Range, and the
Indian Peaks-
Including the cities of 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
854 PM MST Fri Feb 22 2019

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 2 AM MST
SATURDAY...

* WHAT...Snow. Additional snow accumulations of 2 to 4 inches.

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

* WHEN...Until 2 AM MST Saturday.

* ADDITIONAL DETAILS...Travel could be very difficult. The 
  hazardous conditions could impact the evening commute.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Weather Advisory for snow means periods of snow will
cause primarily travel difficulties. Expect snow covered roads
and limited visibilities, and use caution while driving. 

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

&&

$$

COZ036-039>045-231200-
/O.CON.KBOU.WW.Y.0014.000000T0000Z-190223T1500Z/
The Southern Front Range Foothills-
Boulder and the western suburbs of Denver-Denver-Castle Rock-
Briggsdale-Greeley-Fort Morgan-Byers-
Including the cities of Bailey, Central City, Evergreen, 
Georgetown, Idaho Springs, Westcreek, Arvada, Boulder, Golden, 
Lakewood, Longmont, Aurora, Brighton, City of Denver, 
Denver International Airport, Highlands Ranch, Littleton, Parker,
Castle Rock, Elbert, Fondis, Kiowa, Larkspur, Briggsdale, Grover,
Pawnee Buttes, Raymer, Stoneham, Eaton, Fort Lupton, Greeley, 
Roggen, Brush, Fort Morgan, Goodrich, Wiggins, Bennett, Byers, 
Deer Trail, and Leader
854 PM MST Fri Feb 22 2019

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 8 AM MST
SATURDAY...

* WHAT...Snow expected. Total snow accumulations of 4 to 8 inches
  expected with the highest amounts over Denver and the southern 
  foothills.

* WHERE...Portions of central, north central and northeast 
  Colorado.

* WHEN...Through 8 AM MST Saturday.

* ADDITIONAL DETAILS...Plan on slippery road conditions. The 
  hazardous conditions could impact the evening commute.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Weather Advisory for snow means periods of snow will
cause primarily travel difficulties. Expect snow covered roads
and limited visibilities, and use caution while driving. 

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

&&

$$

COZ048-050-051-231200-
/O.CON.KBOU.WW.Y.0014.000000T0000Z-190223T1800Z/
Sterling-Julesburg-Holyoke-
Including the cities of Crook, Merino, Sterling, Peetz, 
Julesburg, Ovid, Sedgwick, Amherst, Haxtun, and Holyoke
854 PM MST Fri Feb 22 2019

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 11 AM MST
SATURDAY...

* WHAT...Snow expected. Total snow accumulations of 3 to 6 inches
  expected. Winds gusting as high as 40 mph.

* WHERE...Portions of east central and northeast Colorado.

* WHEN...Through 11 AM MST Saturday.

* ADDITIONAL DETAILS...Plan on slippery road conditions. Blowing 
  snow could significantly reduce visibility. Gusty winds could 
  bring down tree branches.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Weather Advisory for snow means periods of snow will
cause primarily travel difficulties. Expect snow covered roads
and limited visibilities, and use caution while driving. 

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

&&

$$
4 follow-up statements
796 
WWUS45 KBOU 230856
WSWBOU

URGENT - WINTER WEATHER MESSAGE
National Weather Service Denver CO
156 AM MST Sat Feb 23 2019

COZ034-231000-
/O.EXP.KBOU.WW.Y.0014.000000T0000Z-190223T0900Z/
The Mountains of Summit County, the Mosquito Range, and the
Indian Peaks-
Including the cities of 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
156 AM MST Sat Feb 23 2019

...WINTER WEATHER ADVISORY WILL EXPIRE AT 2 AM MST EARLY THIS
MORNING...

Areas of light snow will remain possible through the early morning
hours, however little to no additional snow is expected. If
traveling this morning, expect snowpacked and slippery roads. 

$$

COZ046-047-049-231700-
/O.CON.KBOU.WS.W.0004.000000T0000Z-190223T1800Z/
Limon-Southern Lincoln County-Akron-
Including the cities of Agate, Hugo, Limon, Matheson, Forder, 
Karval, Kutch, Punkin Center, Akron, Cope, Last Chance, and Otis
156 AM MST Sat Feb 23 2019

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 AM MST THIS
MORNING...

* WHAT...Heavy snow expected. Total snow accumulations of 4 to 8 
  inches expected. Winds gusting as high as 50 mph with areas of 
  blowing snow late tonight into Saturday.

* WHERE...Limon, Southern Lincoln County and Akron.

* WHEN...Until 11 AM MST Saturday.

* ADDITIONAL DETAILS...Plan on slippery road conditions. Blowing 
  snow could significantly reduce visibility. Gusty winds could 
  bring down tree branches.

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.

&&

$$

COZ036-039>045-231500-
/O.CON.KBOU.WW.Y.0014.000000T0000Z-190223T1500Z/
The Southern Front Range Foothills-
Boulder and the western suburbs of Denver-Denver-Castle Rock-
Briggsdale-Greeley-Fort Morgan-Byers-
Including the cities of Bailey, Central City, Evergreen, 
Georgetown, Idaho Springs, Westcreek, Arvada, Boulder, Golden, 
Lakewood, Longmont, Aurora, Brighton, City of Denver, 
Denver International Airport, Highlands Ranch, Littleton, Parker,
Castle Rock, Elbert, Fondis, Kiowa, Larkspur, Briggsdale, Grover,
Pawnee Buttes, Raymer, Stoneham, Eaton, Fort Lupton, Greeley, 
Roggen, Brush, Fort Morgan, Goodrich, Wiggins, Bennett, Byers, 
Deer Trail, and Leader
156 AM MST Sat Feb 23 2019

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 8 AM MST THIS
MORNING...

* WHAT...Snow will continue to decrease and end from west to east
  through the early morning hours. Total snow accumulations of 4 
  to 8 inches expected with the highest amounts over Denver and 
  the southern foothills.

* WHERE...Portions of central, north central and northeast 
  Colorado.

* WHEN...Through 8 AM MST Saturday.

* ADDITIONAL DETAILS...Plan on slippery road conditions. The 
  hazardous conditions could impact the evening commute.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Weather Advisory for snow means periods of snow will
cause primarily travel difficulties. Expect snow covered roads
and limited visibilities, and use caution while driving.

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

&&

$$

COZ048-050-051-231700-
/O.CON.KBOU.WW.Y.0014.000000T0000Z-190223T1800Z/
Sterling-Julesburg-Holyoke-
Including the cities of Crook, Merino, Sterling, Peetz, 
Julesburg, Ovid, Sedgwick, Amherst, Haxtun, and Holyoke
156 AM MST Sat Feb 23 2019

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 11 AM MST THIS
MORNING...

* WHAT...Snow expected. Total snow accumulations of 3 to 6 
  inches expected. Winds gusting as high as 40 mph.

* WHERE...Portions of east central and northeast Colorado.

* WHEN...Through 11 AM MST Saturday.

* ADDITIONAL DETAILS...Plan on slippery road conditions. Blowing 
  snow could significantly reduce visibility. Gusty winds could 
  bring down tree branches.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Weather Advisory for snow means periods of snow will
cause primarily travel difficulties. Expect snow covered roads
and limited visibilities, and use caution while driving.

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

&&

$$
802 
WWUS45 KBOU 231217
WSWBOU

URGENT - WINTER WEATHER MESSAGE
National Weather Service Denver CO
517 AM MST Sat Feb 23 2019

COZ036-039>045-231330-
/O.CAN.KBOU.WW.Y.0014.000000T0000Z-190223T1500Z/
The Southern Front Range Foothills-
Boulder and the western suburbs of Denver-Denver-Castle Rock-
Briggsdale-Greeley-Fort Morgan-Byers-
Including the cities of Bailey, Central City, Evergreen, 
Georgetown, Idaho Springs, Westcreek, Arvada, Boulder, Golden, 
Lakewood, Longmont, Aurora, Brighton, City of Denver, 
Denver International Airport, Highlands Ranch, Littleton, Parker,
Castle Rock, Elbert, Fondis, Kiowa, Larkspur, Briggsdale, Grover,
Pawnee Buttes, Raymer, Stoneham, Eaton, Fort Lupton, Greeley, 
Roggen, Brush, Fort Morgan, Goodrich, Wiggins, Bennett, Byers, 
Deer Trail, and Leader
517 AM MST Sat Feb 23 2019

...WINTER WEATHER ADVISORY IS CANCELLED...

Light snow will be possible along the Palmer Divide through the
early morning hours, otherwise snow has ended. Expect snow covered
and slippery roads this morning. 

$$

COZ048-231330-
/O.CAN.KBOU.WW.Y.0014.000000T0000Z-190223T1800Z/
Sterling-
Including the cities of Crook, Merino, Sterling, and Peetz
517 AM MST Sat Feb 23 2019

...WINTER WEATHER ADVISORY IS CANCELLED...

Light snow will be possible through the early morning hours. 
Expect snow covered and slippery roads this morning. 

$$

COZ046-047-049-231800-
/O.CON.KBOU.WS.W.0004.000000T0000Z-190223T1800Z/
Limon-Southern Lincoln County-Akron-
Including the cities of Agate, Hugo, Limon, Matheson, Forder, 
Karval, Kutch, Punkin Center, Akron, Cope, Last Chance, and Otis
517 AM MST Sat Feb 23 2019

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 AM MST THIS
MORNING...

* WHAT...Heavy snow expected. Additional accumulations of up to 4 
  inches expected. Winds gusting as high as 40 mph with areas of 
  blowing snow.

* WHERE...Limon, Southern Lincoln County and Akron.

* WHEN...Until 11 AM MST Saturday.

* ADDITIONAL DETAILS...Plan on slippery road conditions. Blowing 
  snow could significantly reduce visibility. 

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.

&&

$$

COZ050-051-231800-
/O.CON.KBOU.WW.Y.0014.000000T0000Z-190223T1800Z/
Julesburg-Holyoke-
Including the cities of Julesburg, Ovid, Sedgwick, Amherst, 
Haxtun, and Holyoke
517 AM MST Sat Feb 23 2019

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 11 AM MST THIS
MORNING...

* WHAT...Snow expected. Additional accumulations of up to 2 
  inches expected. Winds gusting as high as 30 mph.

* WHERE...Portions of east central and northeast Colorado.

* WHEN...Through 11 AM MST Saturday.

* ADDITIONAL DETAILS...Plan on slippery road conditions. Blowing 
  snow could significantly reduce visibility.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Weather Advisory for snow means periods of snow will
cause primarily travel difficulties. Expect snow covered roads
and limited visibilities, and use caution while driving.

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

&&

$$
503 
WWUS45 KBOU 231518
WSWBOU

URGENT - WINTER WEATHER MESSAGE
National Weather Service Denver CO
818 AM MST Sat Feb 23 2019

COZ046-047-049-231800-
/O.CON.KBOU.WS.W.0004.000000T0000Z-190223T1800Z/
Limon-Southern Lincoln County-Akron-
Including the cities of Agate, Hugo, Limon, Matheson, Forder, 
Karval, Kutch, Punkin Center, Akron, Cope, Last Chance, and Otis
818 AM MST Sat Feb 23 2019

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 AM MST THIS
MORNING...

* WHAT...Snow will taper off and come to an end from west to east
  across Washington and Lincoln counties this morning. Additional
  snow accumulations less than one inch. Winds gusting as high as
  40 mph.

* WHERE...Akron, Limon and Southern Lincoln County.

* WHEN...Until 11 AM MST this morning.

* ADDITIONAL DETAILS...Plan on slippery road conditions. Blowing
  snow could significantly reduce visibility.

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.

&&

$$

COZ050-051-231800-
/O.CON.KBOU.WW.Y.0014.000000T0000Z-190223T1800Z/
Julesburg-Holyoke-
Including the cities of Julesburg, Ovid, Sedgwick, Amherst, 
Haxtun, and Holyoke
818 AM MST Sat Feb 23 2019

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 11 AM MST THIS
MORNING...

* WHAT...Snow will taper off an come to an end across far
  northeastern Colorado this morning. Additional snow
  accumulations less than one inch. Winds gusting as high as 35 
  mph.

* WHERE...Holyoke and Julesburg.

* WHEN...Until 11 AM MST this morning.

* ADDITIONAL DETAILS...Plan on slippery road conditions. Patchy 
  blowing snow could significantly reduce visibility.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Weather Advisory for snow means periods of snow will
cause primarily travel difficulties. Expect snow covered roads
and limited visibilities, and use caution while driving. 

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

&&

$$
541 
WWUS45 KBOU 231707
WSWBOU

URGENT - WINTER WEATHER MESSAGE
National Weather Service Denver CO
1007 AM MST Sat Feb 23 2019


COZ046-047-049-231815-
/O.CAN.KBOU.WS.W.0004.000000T0000Z-190223T1800Z/
Limon-Southern Lincoln County-Akron-
Including the cities of Agate, Hugo, Limon, Matheson, Forder, 
Karval, Kutch, Punkin Center, Akron, Cope, Last Chance, and Otis
1007 AM MST Sat Feb 23 2019

...WINTER STORM WARNING IS CANCELLED...

Snow has ended across the area. Gusty northwesterly winds to 45
mph this afternoon will have the potential to create blowing snow
from what has fallen, and could impact visibilities across roads.

$$

COZ050-051-231815-
/O.CAN.KBOU.WW.Y.0014.000000T0000Z-190223T1800Z/
Julesburg-Holyoke-
Including the cities of Julesburg, Ovid, Sedgwick, Amherst, 
Haxtun, and Holyoke
1007 AM MST Sat Feb 23 2019

...WINTER WEATHER ADVISORY IS CANCELLED...

Snow has ended across the area. Gusty northwesterly winds up to 40
mph this afternoon will have the potential to create blowing snow
from what has fallen, and could impact visibilities across roads.

$$

What forecasters said that day

The local office's own words before this winter storm warning 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 warning went out at Feb 22, 8:49 PM MST, 5 minutes earlier.

Area forecast discussion, Feb 22, 8:49 PM MST, 5 minutes before
Area Forecast Discussion
National Weather Service Denver/Boulder CO
849 PM MST Fri Feb 22 2019

.UPDATE...
Issued at 842 PM MST Fri Feb 22 2019

Heaviest band of snow is shifting slowly southeast and roughly
along a line from Fort Morgan to Denver. Snowfall rates of 2"-3"
per hour have occurred in some areas with up to 6" in portions of
Denver. Another few inches may fall in Denver but will keep
advisory in place an not upgrade to a warning since heaviest bands
are shifting southeast. Meanwhile have decided to upgrade areas
from Akron to Limon eastward to a warning as heavy snow will
spread into these areas overnight and continue into Sat morning.
Winds will also increase late tonight through sat morning with
quite a bit of blowing snow as well.

UPDATE Issued at 546 PM MST Fri Feb 22 2019

Banded snow is increasing southeast of Greeley to Boulder line
extending into the srn Foothills. At some point these seperate
bands will likely form into one area of heavier snow over the
Denver area and then move east and southeast across the plains
late this evening and overnight. Appears now amounts in the nrn
Foothills and northern areas of the I-25 urban corridor to the WY
border will not see much snow. Thus will likey have to adjust
highlights by mid evening.

&&

.SHORT TERM...(This evening through Saturday)
Issued at 255 PM MST Fri Feb 22 2019

A digging trough is seen on water vapor satellite with a warm
conveyor belt extending from the Gulf of California to western
Colorado. Underneath this conveyor belt, moderate to heavy
precipitation has been reported across the Desert Southwest. At the
surface, a cyclone has developed near Centennial with clearing to
the south and east and with low clouds and fog to the northeast of
the cyclone. Visible satellite and radar indicate snow showers
developing over the north central mountains and increasing in
coverage and intensity.

An analysis of model sounding data shows that there are good mid
level lapse rates which may lead to upright convection in the
mountain showers this afternoon. These showers will continue to
develop and will move eastward over the urban corridor and eastern
plains late this afternoon and evening. While there are weaker lapse
rates over the plains, model cross sections indicate the potential
for CSI to be released this evening. Since there is a considerable
amount of upright and/or slantwise instability within the atmosphere
this afternoon and evening, the potential exists for strong bands of
snow to develop with snowfall rates of up to 1.5 inches per hour.
Individual model runs are all over the place on where these heavy
bands will setup so there is low to medium confidence in snowfall
amounts at any particular location across the urban corridor and
eastern plains. With that being said, 2 to 6 inches is still
expected over the urban corridor and eastern plains and the message
of the Winter Weather Advisory remains the same, that there will be
hazardous travel conditions underneath the snow bands during the
commute this evening. One potential area that may have a higher
potential to see a snow band impact the evening commute is Estes
Park, Fort Collins and Loveland. This is because a band that is
currently aligned over the higher mountains from western Summit
County to southern Larimer County will move northeastward toward the
aforementioned areas. This is supported by recent HRRR and RAP
solutions as well as the increase in radar reflectivities. Storm
total snowfall is not expected to be above the 2 to 6 inch forecast
in these areas, however, because during the rest of the event,
downslope flow will hinder snowfall rates. An area of potentially
higher storm total snowfall amounts is the Palmer Divide. An initial
band of snow may move through that area shortly after 00Z and then
strong upslope flow with ascent aloft will enhance snowfall
throughout the rest of the event. If the initial band does setup
over the Palmer Divide, there is potential to see amounts above 6
inches which could require an upgrade to a Winter Storm Warning. The
evening shift will monitor the potential for an upgrade there.

Tomorrow morning, the snow will depart the eastern plains and then
mainly dry conditions are expected the rest of the day. Strong wind
gusts are expected over the eastern plains and Cheyenne Ridge with
gusts up to 50 mph possible.

.LONG TERM...(Saturday night through Friday)
Issued at 255 PM MST Fri Feb 22 2019

Colorado will be under the influence of a zonal flow aloft through
much of the period which should result in dry and warmer weather
across north central and northeastern Colorado through Thursday.
There may be enough moisture to produce isolated to scattered light
snow showers across the high country at times with the best chance
Saturday night and Thursday. The plains should see dry weather with
temperatures at or above normal values. The far northeast plains may
see breezy conditions Sunday evening due to the pressure gradient
between the northern plains states and Colorado. Tuesday and
Thursday look to be the warmest days of the week due to some weak
ridging.

Thursday night into Friday there are some inconsistencies in the
models. The GFS has an upper level trough moving across the
central and northern Rockies with a 140+KT upper jet over southern
Colorado. The ECMWF and GEM show no such ridge, and has Colorado
under the influence of a moderate to strong northwesterly flow
aloft. Despite the differences, either solution could produce
accumulating snow in the mountains and colder unsettled weather
across the plains.

&&

.AVIATION...(For the 06Z TAFS through 06Z Saturday night)
Issued at 842 PM MST Fri Feb 22 2019

Heaviest snow has moved se of DIA but light to moderate snow will
continue for a few more hours with additional accumulations up to
2". Snow should begin to decrease by midnight.

&&

.BOU WATCHES/WARNINGS/ADVISORIES...
Winter Weather Advisory until 11 AM MST Saturday for COZ048-050-
051.

Winter Weather Advisory until 2 AM MST Saturday for COZ034.

Winter Weather Advisory until 8 AM MST Saturday for COZ036-
039>045.

Winter Storm Warning until 11 AM MST Saturday for COZ046-047-049.

&&

UPDATE...RPK
SHORT TERM...Danielson
LONG TERM...Kalina
AVIATION...RPK
Hazardous weather outlook, Feb 22, 11:01 AM MST, 9 hours 53 minutes before
Hazardous Weather Outlook
National Weather Service Denver/Boulder CO
1101 AM MST Fri Feb 22 2019

COZ030>051-231815-
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-
1101 AM MST Fri Feb 22 2019

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

.DAY ONE...Today and Tonight

Moderate to heavy snow bands will push east this evening across
the urban corridor and plains, with 2 to 6 inches of snow
possible along with gusty northwest winds. Hazardous traveling
conditions are expected for the latter half of the evening
commute.

In the mountains, snow will increase this afternoon and evening
with 5 to 8 inches of additional snowfall expected by Saturday
morning.

.DAYS TWO THROUGH SEVEN...Saturday through Thursday

Snow combined with gusty northwest winds will result in difficult
travel over portions of eastern Colorado Saturday morning. The
snow will move east of the area by late morning, however gusty
northwest winds will persist and produce localized blowing snow
through Saturday afternoon. Warmer and drier conditions are
expected Sunday and into early next week.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be needed today or tonight.

In the hours before

Local storm report, Feb 22, 8:02 PM MST, 52 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DENVER CO
802 PM MST FRI FEB 22 2019

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0745 PM     SNOW             2 E DENVER              39.74N 104.94W
02/22/2019  M4.0 INCH        DENVER             CO   TRAINED SPOTTER

0730 PM     SNOW             2 SE BRECKENRIDGE       39.48N 106.03W
02/22/2019  M4.4 INCH        SUMMIT             CO   TRAINED SPOTTER

0730 PM     SNOW             3 SW AURORA             39.67N 104.85W
02/22/2019  M2.0 INCH        ARAPAHOE           CO   PUBLIC

0725 PM     SNOW             2 ENE BROOMFIELD        39.93N 105.03W
02/22/2019  M2.0 INCH        BROOMFIELD         CO   COCORAHS

0715 PM     SNOW             5 E DENVER              39.82N 105.01W
02/22/2019  M3.0 INCH        ADAMS              CO   BROADCAST MEDIA

0710 PM     SNOW             3 SSW BOULDER           39.99N 105.26W
02/22/2019  M0.8 INCH        BOULDER            CO   NWS EMPLOYEE

            DAVIS SKAGGS RESEARCH CENTER NOAA.

0700 PM     SNOW             BEAR LAKE               40.31N 105.64W
02/22/2019  M1.0 INCH        LARIMER            CO   MESONET

0646 PM     SNOW             1 W ASPEN SPRINGS       39.83N 105.50W
02/22/2019  M4.3 INCH        GILPIN             CO   TRAINED SPOTTER

0634 PM     SNOW             3 N ARVADA              39.86N 105.10W
02/22/2019  M3.5 INCH        JEFFERSON          CO   BROADCAST MEDIA

0620 PM     SNOW             2 NE ERIE               40.05N 105.02W
02/22/2019  M1.0 INCH        WELD               CO   TRAINED SPOTTER

0610 PM     SNOW             GREELEY                 40.42N 104.69W
02/22/2019  M0.5 INCH        WELD               CO   TRAINED SPOTTER

0537 PM     SNOW             1 NE EVERGREEN          39.64N 105.33W
02/22/2019  M1.2 INCH        JEFFERSON          CO   TRAINED SPOTTER

0400 PM     SNOW             3 SE BRAINARD LAKE      40.04N 105.54W
02/22/2019  M1.0 INCH        BOULDER            CO   MESONET

&&
Local storm report, Feb 22, 8:30 PM MST, 24 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DENVER CO
830 PM MST FRI FEB 22 2019

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0829 PM     HEAVY SNOW       3 S BUCKLEY AFB         39.66N 104.74W
02/22/2019  M6.5 INCH        ARAPAHOE           CO   PUBLIC

0823 PM     SNOW             2 WNW WESTMINSTER       39.89N 105.08W
02/22/2019  M1.7 INCH        JEFFERSON          CO   PUBLIC

0822 PM     SNOW             3 S DENVER              39.69N 104.97W
02/22/2019  M5.3 INCH        DENVER             CO   PUBLIC

0821 PM     SNOW             3 N DENVER              39.78N 104.98W
02/22/2019  M2.0 INCH        DENVER             CO   PUBLIC

0820 PM     SNOW             2 NE DENVER             39.76N 104.97W
02/22/2019  M3.6 INCH        DENVER             CO   PUBLIC

0818 PM     SNOW             2 SE LAKEWOOD           39.69N 105.03W
02/22/2019  M4.0 INCH        DENVER             CO   PUBLIC

0816 PM     SNOW             WHEAT RIDGE             39.77N 105.10W
02/22/2019  M2.0 INCH        JEFFERSON          CO   PUBLIC

0815 PM     SNOW             AURORA                  39.70N 104.81W
02/22/2019  M4.0 INCH        ARAPAHOE           CO   PUBLIC

0813 PM     SNOW             4 NE DENVER             39.77N 104.88W
02/22/2019  M5.5 INCH        DENVER             CO   PUBLIC

0813 PM     SNOW             LAFAYETTE               39.99N 105.10W
02/22/2019  M0.5 INCH        BOULDER            CO   PUBLIC

0813 PM     SNOW             HIGHLANDS RANCH         39.55N 104.97W
02/22/2019  M4.0 INCH        DOUGLAS            CO   PUBLIC

0810 PM     SNOW             LOUISVILLE              39.97N 105.14W
02/22/2019  M0.4 INCH        BOULDER            CO   PUBLIC

0810 PM     SNOW             SUPERIOR                39.95N 105.17W
02/22/2019  M0.5 INCH        BOULDER            CO   PUBLIC

0805 PM     SNOW             5 NW DENVER             39.77N 105.05W
02/22/2019  M3.2 INCH        DENVER             CO   NWS EMPLOYEE

0802 PM     SNOW             FRANKTOWN               39.39N 104.75W
02/22/2019  M0.5 INCH        DOUGLAS            CO   PUBLIC

0800 PM     SNOW             DENVER INTL AIRPORT     39.83N 104.67W
02/22/2019  M3.8 INCH        DENVER             CO   OFFICIAL NWS OBS

0745 PM     SNOW             2 E DENVER              39.74N 104.94W
02/22/2019  M4.0 INCH        DENVER             CO   TRAINED SPOTTER

0730 PM     SNOW             3 SW AURORA             39.67N 104.85W
02/22/2019  M2.0 INCH        ARAPAHOE           CO   PUBLIC

0730 PM     SNOW             2 SE BRECKENRIDGE       39.48N 106.03W
02/22/2019  M4.4 INCH        SUMMIT             CO   TRAINED SPOTTER

0725 PM     SNOW             2 ENE BROOMFIELD        39.93N 105.03W
02/22/2019  M2.0 INCH        BROOMFIELD         CO   COCORAHS

0715 PM     SNOW             5 E DENVER              39.82N 105.01W
02/22/2019  M3.0 INCH        ADAMS              CO   BROADCAST MEDIA

0710 PM     SNOW             3 SSW BOULDER           39.99N 105.26W
02/22/2019  M0.8 INCH        BOULDER            CO   NWS EMPLOYEE

            DAVIS SKAGGS RESEARCH CENTER NOAA.

0700 PM     SNOW             BEAR LAKE               40.31N 105.64W
02/22/2019  M1.0 INCH        LARIMER            CO   MESONET

0646 PM     SNOW             1 W ASPEN SPRINGS       39.83N 105.50W
02/22/2019  M4.3 INCH        GILPIN             CO   TRAINED SPOTTER

0634 PM     SNOW             3 N ARVADA              39.86N 105.10W
02/22/2019  M3.5 INCH        JEFFERSON          CO   BROADCAST MEDIA

0620 PM     SNOW             2 NE ERIE               40.05N 105.02W
02/22/2019  M1.0 INCH        WELD               CO   TRAINED SPOTTER

0610 PM     SNOW             GREELEY                 40.42N 104.69W
02/22/2019  M0.5 INCH        WELD               CO   TRAINED SPOTTER

0537 PM     SNOW             1 NE EVERGREEN          39.64N 105.33W
02/22/2019  M1.2 INCH        JEFFERSON          CO   TRAINED SPOTTER

0400 PM     SNOW             3 SE BRAINARD LAKE      40.04N 105.54W
02/22/2019  M1.0 INCH        BOULDER            CO   MESONET

&&

Nearby

Winter Storm Warnings in Colorado, 2019Every winter storm warning in 2019

Sources

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