Public Information Statement
Issued by NWS Denver/Boulder, CO

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COZ030>051-292300-

Public Information Statement
National Weather Service Denver/Boulder CO
645 PM MDT SAT OCT 28 2017

...This week in metro Denver weather history...

27-30 In 2009...a powerful early season storm brought heavy
        snow to the Front Range. The combination of a deep
        northeasterly upslope flow coupled with abundant moisture
        and lift with the developing storm system produced an
        extended period of moderate to heavy snowfall. The heavy
        wet snow accumulated on trees and resulted in broken
        branches and scattered electrical outages.  Interstates 70
        and 76 were closed east of Denver. Numerous other roads
        and highways were shut down. The Red Cross set up numerous
        emergency shelters for stranded travelers. The blowing
        snow at Denver International Airport forced the
        cancellation of hundreds of flights. Schools were also
        closed. In the foothills storm totals included: 46 inches...
        3 miles southeast of Pinecliffe; 42 inches...3 miles
        southwest of Conifer; 34 inches...3 miles north of
        Blackhawk; 30 inches at Aspen Springs and near Evergreen...
        23 inches at Roxborough Park...and 20 inches...3 miles
        south-southeast of Morrison. Across the Urban Corridor
        storm totals included: 25 inches in Highlands Ranch;
        21.5 inches near Louisville...20.5 inches in Broomfield...
        20 inches at Lafayette...17.5 inches in Boulder...17 inches
        in Westminster...16.5 inches in Erie; 15.5 inches in
        Arvada and 5 miles west-northwest of Littleton...15 inches
        in Littleton...14 inches in Englewood...13.5 inches in
        Lakewood and 6 miles north of Thornton; 13.3 inches at
        Denver International Airport...11 inches...4 miles south of
        Denver; 10.5 inches...2 miles north of Cherry Hills Village
        and Niwot.
28-29 In 1993...an upper level disturbance combined with a moist
        upslope flow to bring heavy snow to portions of metro
        Denver.  Snowfall amounts ranged from 5.4 inches at
        Stapleton International Airport to 14 inches in Boulder.
        New snowfall totaled 8 inches at Gross Reservoir in the
        foothills 5 miles southwest of Boulder.  On the 28th...north
        winds gusted to 30 mph at Stapleton International Airport
        where the temperature climbed to only 25 degrees on the
        29th...equaling the record low maximum for the date.
28-30 In 1971...a vigorous cold front plunged temperatures from a
        high of 70 degrees on the 27th to record low levels on the
        29th and 30th.  Snowfall totaled 3.1 inches at Stapleton
        International Airport where north winds gusted to 23 mph.
        Some freezing drizzle also fell on the 28th.  Record daily
        low maximum temperatures of 32 degrees on the 28th and 25
        degrees on the 29th were established along with a daily
        record minimum of 13 degrees on the 30th.
28-31 In 1929...rain changed to snow on the afternoon of the 28th
        and continued until midday on the 30th followed by
        intermittent light snow which continued through the 31st.
        Snowfall over the four days totaled 16.2 inches in the
        city.  Most of the snow...8.5 inches...fell on the 29th
        with 6.1 inches on the 30th.  Temperatures hovered in
        20`s during most of the storm.
29    In 1917...the all-time lowest recorded temperature in
        October...2 degrees below zero...occurred.  This is
        also the earliest below zero reading of the season.
      In 1939...the first measurable snow of the season totaled
        5.6 inches in downtown Denver.  Post-frontal northeast
        winds were sustained to 28 mph.
      In 1961...heavy snowfall measured 6.0 inches at Stapleton
        Airport where northeast winds gusted to 30 mph.
      In 1973...strong winds caused some damage to homes...stores...
        and utility lines along the foothills from metro Denver
        south.
      In 1981...high winds buffeted the Front Range foothills with
        gusts to 55 mph in south Boulder.
      In 1996...high winds gusting from 70 to around 100 mph blasted
        metro Denver.  One man was killed when a strong wind gust
        overturned a pop-up camper onto him while he was trying to
        secure it.  In addition...five people at the Rocky Flats
        Environmental Test Facility received minor injuries when
        several windshields were blown out of their cars...spraying
        glass onto the occupants.  Several trees and power lines
        were also downed.  Two 75-foot high pine trees were uprooted
        at the Mt. Olivet Cemetery in Arvada.  Property damage from
        the windstorm ran into the millions of dollars.  The highest
        recorded wind gusts included:  101 mph at Jefferson County
        Airport near Broomfield...100 mph in Golden Gate Canyon...96
        mph in Coal Creek Canyon...and 87 mph at upper Table Mesa in
        Boulder.  West-northwest winds gusted to 43 mph at Denver
        International Airport.  Insured damage from the wind storm
        totaled 5.2 million dollars...the third most costly storm of
        record in Colorado at the time.
      In 2003...strong chinook winds developed in and near the Front
        Range foothills.  Winds gusting to 80 mph in Boulder downed
        several trees and power lines...causing damage and triggering
        scattered electrical outages.  The combination of strong
        winds...very dry fuel conditions...and downed power lines
        sparked two large wildfires.  The Overland Wildfire in
        Boulder County...near Jamestown...consumed nearly 3900 acres
        and destroyed 12 structures...including homes...trailers...and
        out-buildings.  Preliminary damage estimates for the value
        of lost property was nearly one million dollars.  In Douglas
        County...the Cherokee Ranch Wildfire consumed 1200 acres and
        destroyed 4 structures.  The large smoke plumes from both
        fires were highly visible across metro Denver.  West winds
        gusted to 45 mph at Denver International Airport.
29-30 In 1905...heavy snowfall developed on the evening of the 29th
        and continued through the evening of the 30th.  Snowfall
        totaled 11.0 inches in downtown Denver.  Precipitation
        was 1.02 inches.  Temperatures were generally in the 20`s.
      In 1959...rain during most of the day on the 28th changed to
        snow early on the 29th and continued through most of the
        30th.  Heavy snowfall totaled 7.4 inches at Stapleton
        Airport.  North-northeast winds gusted to 24 mph on the
        30th.  Some freezing drizzle also occurred on the 30th.
      In 1981...4 to 8 inches of new snow were recorded in the
        foothills west of Denver.  Snowfall totaled only 0.4 inch
        at Stapleton International Airport where north winds gusted
        to 25 mph.
29-31 In 1889...the first snowfall of the season totaled 14.0 inches
        over the three days in downtown Denver.  Snowfall was 8.0
        inches on the 29th and 5.0 inches on the 31st.  North to
        northeast winds gusted to 30 mph on the 29th.
      In 1950...a warm spell resulted in five daily temperature
        records.  Record highs of 84...80...and 79 degrees occurred
        on the 29th...30th...and 31st...respectively.  Low temperature
        of 49 degrees on the 30th was the record high minimum for
        the date.
      In 1991...the second surge of cold Arctic air in a matter of
        days plunged metro Denver into the deep freeze.  While
        low temperatures remained above zero...high temperatures
        were only in the 20`s.  Three temperature records were set:
        record lows of 7 degrees on the 30th and 10 degrees on the
        31st and a record low maximum of only 21 degrees on the
        30th.  Snowfall was light with only 1.9 inches recorded at
        Stapleton International Airport where east winds gusted
        to 23 mph.
      In 2002...snowfall totaled 4.3 inches at the site of the former
        Stapleton International Airport.  North winds gusted to 32
        mph on the 29th behind a cold front...which plunged
        temperatures well below seasonal normals.  High temperatures
        of 18 degrees on the 30th and 19 degrees on the 31st were
        record low maximums for each date.  Low temperatures dipped
        to 12 degrees on the 30th and 15 degrees on the 31st.
29-1  In 1972...heavy snowfall totaled 15.5 inches at Stapleton
        International Airport.  However...the heaviest snow occurred
        on Halloween night when 7 inches fell on trick-or-treaters
        during a short 3-hour period.  I-25 was closed south of
        Denver.  North winds gusting to 29 mph caused some blowing
        snow on the 1st.  The snow started late on the 29th and
        ended during the mid afternoon on the 1st.  The greatest
        snow depth on the ground at Stapleton International Airport
        was 13 inches on the 1st.
30    In 1974...a rare thunderstorm for so late in October produced
        hail to 3/8 inch in diameter and 0.10 inch of rain at
        Stapleton International Airport.
      In 1991...the high temperature warmed to only 21 degrees...the
        all-time record low maximum for the month of October.  The
        same temperature also occurred on October 25...1997.
31    In 1997...high winds buffeted the foothills and adjacent
        areas of metro Denver.  West winds gusted to 70 mph in
        Broomfield and to 40 mph at Denver International Airport.
        The strongest winds occurred in the mountains west of
        Denver and in the foothills north of Denver.
      In 2001...high winds developed in the foothills.  Peak wind
        gusts were measured to 74 mph at the National Center for
        Atmospheric Research on the mesa in Boulder and to 72 mph
        near Rollinsville.  West winds gusting as high as 53 mph
        warmed the temperature to a high of 71 degrees at Denver
        International Airport.
31-1  In 1951...6.4 inches of snowfall were measured at Stapleton
        Airport.
      In 1989...a Halloween storm dropped 3 to 6 inches of snow on
        metro Denver with the adjacent foothills receiving 5 to
        10 inches.  Snowfall totaled 4.5 inches at Stapleton
        International Airport...where north winds gusted to 31 mph
        on the 31st.  Most of the snow fell on the evening of the
        31st...but the storm left icy streets throughout metro Denver
        on the morning of the 1st...making it a "spooky" commute for
        many motorists.
      In 2004...heavy snow fell in and near the foothills of Jefferson
        and Douglas counties.  Storm total snowfall included:  14.5
        inches in Aspen Park...10 inches at Roxborough State Park and
        and near Sedalia...8 inches near Bergen Park...and 7 inches in
        Highlands Ranch.  Snowfall totaled only 3.2 inches in the
        Denver Stapleton area.  Post-frontal northeast winds gusted
        to 41 mph at Denver International Airport.
1     In 1896...northwest chinook winds sustained to 40 mph with
        gusts to 46 mph warmed the temperature to a high of 60
        degrees in the city.
      In 1973...wind gusts to 92 mph were recorded in Boulder.
        West winds gusted to 41 mph at Stapleton International
        Airport where the chinook winds warmed the temperature
        to a high of 70 degrees.
      In 1989...a 39-year-old Lakewood man in a motorized
        wheelchair was found dead of exposure early in the
        morning after an overnight snowfall dumped 3 to 6
        inches of snow across metro Denver.
1-2   In 1892...snowfall totaled 5.0 inches in downtown Denver.
        This was the only snow of the month.
      In 1956...heavy snowfall totaled 7.0 inches at Stapleton
        Airport.  The storm was accompanied by much blowing and
        drifting snow.  North winds gusted to 47 mph.
      In 1991...the storm system which hit the Front Range at the
        end of October finished the job during the start of
        November.  Six inches of new snow were recorded at both
        Rollinsville and Morrison...while 2.9 inches of snow
        fell at Stapleton International Airport where northeast
        winds gusted to 17 mph.  The temperature climbed to a
        high of only 19 degrees on the 2nd...setting a record
        low maximum for the date.
      In 1995...a winter storm dropped 5 to 8 inches of snow in
        the Front Range foothills.  The exception was at Golden
        Gate Canyon where a foot of new snow was measured.  Icy
        roads...fog...and blowing snow along I-70 in the foothills
        west of Denver caused dozens of accidents.  One man was
        killed when he lost control of his vehicle and was ejected
        when his truck hit a median and rolled over.  At least 20
        other accidents involved minor injuries.  Only 1.0 inch of
        snow fell at the site of the former Stapleton International
        Airport where some freezing rain also fell.
2     In 1939...a trace of snow fell over downtown Denver.  This
        snow...along with a trace of snow on the 9th...was the only
        snow of the month...ranking it...along with other months...the
        second least snowiest November on record.
      In 1967...post-cold frontal heavy snowfall totaled 6.2
        inches at Stapleton International Airport where north
        winds gusted to 29 mph...briefly reducing the visibility
        to 1/8 mile.
      In 1992...the first major snowfall of the season dumped 4.6
        inches of snow at Stapleton International Airport where
        north winds gusted to 26 mph.  Heavier amounts of snow
        fell in and near the foothills with 8 inches at Conifer...
        Empire...and Bailey...6 inches at Rollinsville and Golden
        Gate Canyon...and 4 inches at Morrison and Wheat Ridge.
      In 2011...a storm system brought another around of moderate
        to heavy snow to the region. Areas in and near the Front
        Range Foothills and Palmer Divide were hit the hardest.
        Gusty winds also produced blizzard conditions at times
        along the Palmer Divide. In addition...the snow and
        blowing snow forced several school closures in Douglas and
        Weld Counties. Snow drifts...from 1 to 3 feet deep were
        reported in the northern portion of Douglas and Elbert
        Counties.  Storm totals included: 14 inches...4 miles south
        of Boulder and 12.5 miles northwest of Golden...13 inches...
        5 miles east-southeast of Aspen Springs; 12 inches near
        Allenspark and Parker; 11 inches...6 miles southwest of
        Castle Rock...Genessee...9 miles north-northeast of
        Elizabeth...10 inches...10 miles south-southeast of
        Buckley AFB. At the National Weather Service in Boulder...
        7.9 inches of snow was recorded...with 4.5 inches observed
        at Denver International Airport.
2-3   In 1974...heavy snowfall totaled 6.1 inches at Stapleton
        International Airport where north winds gusted to 23 mph
        on the 3rd.  Most of the snow fell on the 3rd.  Maximum
        snow depth on the ground was 5 inches.
      In 1990...a winter storm dumped 3 to 8 inches of heavy wet
        snow across metro Denver.  In the foothills snow amounts
        ranged from 4 to 10 inches.  Slushy snow and ice-covered
        roads snarled traffic.  The snow...ice...and poor visibilities
        were blamed for numerous traffic accidents.  Low clouds...
        fog...and snow delayed air traffic at Stapleton International
        Airport for at least 90 minutes on the afternoon of the 2nd.
        Snowfall totaled 5.4 inches at Stapleton International
        Airport where north winds gusted to 21 mph.
2-5   In 1946...a major snow storm dumped 30.4 inches of heavy
        snowfall downtown and 31.0 inches at Stapleton Airport.
        The winter storm closed schools and disrupted all forms of
        transportation in the city.  The greatest depth of snow on
        the ground was 28 inches at the airport.  The duration of
        the snowfall...from 4:22 AM on the 2nd to 3:08 AM on the 5th...
        a total of 70 hours and 46 minutes...is the second longest
        period of continuous precipitation on record and the second
        heaviest snowfall of record at the time in Denver.  The 17.7
        inches of snowfall on the 2nd and 3rd was the greatest 24-
        hour snowfall ever recorded during the month of November.
        Buses and street cars had a difficult time...and many cars
        were abandoned along roadsides and streets for several days.
        Secondary roads in rural areas were blocked for 2 to 3
        weeks.  Several buildings in the city collapsed or were
        damaged from the weight of the heavy snow.  Football games
        were canceled.  Livestock losses were high over eastern
        Colorado.  The precipitation from this storm alone exceeded
        the greatest amount ever recorded in Denver during the
        entire month of November previously.  The precipitation
        recorded downtown was 2.03 inches...and the previous record
        for the entire month of November was 1.95 inches in 1922.
        North winds were sustained to 26 mph on the 2nd.
3     In 1940...the longest period without snow...200 days...ended on
        this date with the first snow of the season...a trace...on
        November 4...1940.  The last snow of the previous season...
        also a trace...occurred on April 17...1940.
      In 1959...a rare thunderstorm in November occurred around
        sunrise.  Rainfall measured only 0.02 inch at Stapleton
        Airport.
      In 1993...periodic high winds buffeted the foothills west
        of Denver.  Wind gusts to 90 mph were recorded at
        Rollinsville in the foothills southwest of Boulder...while
        gusts to 85 mph were observed atop Squaw Mountain near
        Idaho Springs.  West winds gusted to 37 mph at Stapleton
        International Airport.
      In 1996...a rare November thunderstorm during the early
        evening produced 0.10 inch of rain at Denver International
        Airport and only 0.06 inch of rain at the site of the former
        Stapleton International Airport.
      In 2005...strong winds developed over the Urban Corridor.
        While the damaging winds were in the Fort Collins area...
        high winds also developed to the south of Denver in
        Douglas County.  Peak wind reports included 70 mph at
        Franktown...65 mph in Castle Rock...and 61 mph in Sedalia.
        West winds gusting as high as 47 mph warmed the temperature
        to a high of 69 degrees at Denver International Airport.
        Winds were strong and gusty for most of the daytime hours
        across metro Denver.
3-4   In 1994...a fast moving snow storm dumped 8 to 9 inches of
        snow on Boulder...Broomfield...and Lafayette.  Snowfall
        totaled only 1.8 inches at Stapleton International Airport
        where on the 3rd east winds gusted to 20 mph and some
        freezing drizzle fell.
4     In 1940...a trace of snow fell in downtown Denver.  This
        marked the start of the shortest snow season on record...
        167 days...through April 19...1941...when 0.4 inch of snow
        fell.
      In 1959...high winds caused damage in many areas of the
        eastern plains.  In Denver...winds averaged 40 mph with
        gusts to 70 mph.  Some damage was reported to utility
        lines...signs...and vehicles.  Northeast winds were
        sustained to 30 mph at Stapleton Airport.
4-5   In 1933...the first measurable snow of the season totaled
        only 2.5 inches.  This was the only measurable snow
        of the month.  Northwest winds were sustained to
        27 mph on the 4th.
      In 1951...heavy snowfall of 5.7 inches was measured at
        Stapleton Airport where northwest winds gusted to 32
        mph.

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