Public Information Statement
Issued by NWS Denver/Boulder, CO

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NOUS45 KBOU 280859

Public Information Statement
National Weather Service Denver/Boulder CO
259 AM MDT THU SEP 28 2017

...Today in metro Denver weather history...

26-28 In 1936...the heaviest snowfall ever recorded in September
        and the heaviest snowfall ever recorded so early in the
        season dumped a total of 16.5 inches of snow on downtown
        Denver and 21.3 inches at Denver Municipal Airport.  The
        15.0 inches of snow measured from 6:00 PM on the 27th to
        6:00 PM on the 28th is the greatest 24 hour snowfall ever
        recorded in September.  This was the first snow of the
        season.  The snow was intermittent through the 26th...but
        continuous from early afternoon on the 27th to around
        midnight on the 28th...except for a period of rain during
        the afternoon of the 28th which contributed to a loss of
        depth on the ground.  The greatest snow depth on the ground
        downtown was 13 inches with 8 inches at Denver Municipal
        Airport.  There were no high winds with the storm and
        traffic was interrupted for only a short period.  The
        storm produced property damage estimated at 7 million
        dollars.  With trees and shrubs in full foliage...the leaves
        caught and held the heavy water-laden snow...until the
        branches snapped from the weight.  More than 3000 workmen
        were called to remove the debris and snow from the city.  The
        city firemen who were off well as all the reserves...
        were asked to report to their stations.  All schools in the
        city remained open...but attendance was only 50 percent of
        normal.  Grade school students were sent home at noon on the
        28th.  The early storm caught stockmen with many cattle still
        in higher ranges.  Warm weather followed the snow...which had
        all melted by the end of the month...except for a few inches
        in sheltered places.
27-28 In 1984...heavy snow fell over the plains and foothills.
        Snowfall amounts ranged from 2 to 5 inches on the plains
        with up to a foot at higher elevations in the foothills.
        The main problem caused by the storm was thousands of
        power outages caused by snow-laden tree limbs snapping and
        falling onto power lines.  Over 15 thousand homes lost
        power in metro Denver.  Some cars were damaged by falling
        trees and limbs.  The snow also caused some flight delays
        at Stapleton International Airport where 5.1 inches of
        snow fell and northeast winds gusted to 29 mph.  Maximum
        snow depth on the ground was 3 inches due to melting.  The
        high temperature of only 34 degrees on the 28th was a
        record low maximum for the date and equaled the all-time
        record for the month at that time.
28    In 1877...heavy dense smoke from mountain forest fires spread
        over the city.  The smoke was so dense that it obscured the
        sun at times.
      In northeast winds were sustained to 44
      In 1953...a Pacific cold front produced a west wind gust to 59
        mph at Stapleton Airport where the visibility was briefly
        reduced to 3/4 miles in blowing dust.  Strong winds were
        also widespread over Boulder during the afternoon.
      In 1960...strong...gusty winds tore the roof from 6 units of a
        motel on west Colfax Avenue in Denver.  The roofing sailed
        over the building and crashed down on a truck...wrecking it.
        The strong winds were the result of an apparent microburst.
      In 1999...snow fell in the foothills west of metro Denver and
        over the plains.  Snowfall totals included 7 inches at
        Conifer.  At the site of the former Stapleton International
        Airport...3.1 inches of snow were measured.  This was the
        first snow of the season.  The heavy wet snow snapped
        branches from fully leafed trees...downing power lines and
        causing scattered outages.
      In 2004...severe thunderstorms produced hail to 3/4 inch in
        diameter in Littleton and in Douglas County 14 miles
        northwest of Castle Rock.
      In 2012...a weak tornado (EF-0) tornado touched down near
        Strasburg.  No damage was reported.
28-29 In of the heaviest September snow storms of record
        began as rain and changed to heavy wet snow.  The storm
        caused heavy damage to trees and shrubbery...which were
        still in full leaf.  The storm dumped 10.6 inches of snow
        at Stapleton Airport...the third heaviest September snow
        amount to date.  Falling trees and limbs disrupted
        traffic...broke power and communication lines...and damaged
        buildings and cars.  One man was killed in Denver by a
        falling tree limb...and four others died of heart
        attacks while shoveling snow or trying to move heavy
        tree limbs.  Direct costs of the storm for cleaning up
        debris...repairing utility lines...and damage to buildings
        and other property across all of eastern Colorado were
        estimated to be over a half million dollars.  The value
        of trees destroyed or damaged was estimated to exceed
        five million dollars.  North-northeast winds gusted to
        32 mph at Stapleton Airport on the 28th.
      In unusually cold air mass for this time of year
        settled over the area.  Metro Denver received 8 to 12
        inches of powdery snow.  The 8.7 inches of snow that
        fell at Stapleton International Airport was the first
        measurable snow of the season and the city`s heaviest
        September snowfall since 1971.  The snow caused flight
        delays of over 2 hours at Stapleton International Airport.
        I-70 was closed for a time west of Denver.  Snow-laden
        tree limbs snapped over all of metro Denver...causing
        widespread power outages.  Ten thousand people were without
        electricity for a time in Boulder.  The morning of the 29th
        saw mid-winter temperatures along the Front Range.  The
        temperature dipped to 17 degrees...the lowest temperature
        ever recorded in September in Denver.  The high temperature
        of only 29 degrees on the 29th was a new record low maximum
        for the date and lowest ever recorded during the month of
        September.  The low temperature of 21 degrees on the evening
        of the 28th set a new record low for the date.  The cold
        weather persisted through the 1st with record minimum
        temperatures of 25 degrees set on the 30th and 27 degrees
        set on October 1st.

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