Public Information Statement
Issued by NWS Denver/Boulder, CO

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NOUS45 KBOU 210859

Public Information Statement
National Weather Service Denver/Boulder CO
259 AM MDT SAT OCT 21 2017

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

18-23 In extended warm spell resulted in 5 new temperature
        records.  The high temperature of 84 degrees on the 18th
        equaled the record high for the date.  High temperatures
        of 86 degrees on the 19th...83 degrees on the 21st...and 84
        degrees on the 22nd were record highs for the dates.  Low
        temperature of 49 degrees on the 23rd was a record high
        minimum for the date.  Low temperatures during the period
        were in the 40`s and lower 50`s.
19-23 In 1906...heavy snowfall totaled 22.7 inches in the city over
        the 5 days.  Rain changed to snow on the evening of the
        19th...and snow continued through the late afternoon of the
        23rd.  The heaviest amount of snowfall...16.0 inches...fell
        from 8:00 PM on the 20th to 8:00 PM on the 22nd.  The most
        snow on the ground was 13.3 inches on the evening of the
        23rd.  This was the first snow of the season and the only
        snow of the month.  Winds during the storm were from the
        north at sustained speeds of 20 to 30 mph each day.
        Temperatures during the storm were generally in the 20`s.
20-21 In 2007...a storm system brought heavy snow to the southern
        Denver suburbs as well as the Palmer Divide south of
        Denver.  Storm totals included:  7.5 inches near Castle
        Rock...Lone Tree and Greenwood Village...with 6.5 inches at
        Elizabeth.  Snow drifts up to 2 feet deep were observed 6
        miles south-southwest of Elizabeth.  In the Denver
        Stapleton area...2.0 inches of snow was observed.
      In 2009...heavy snow developed along the Palmer Divide
        south and southeast of Denver as a storm system tracked
        across southern Colorado and northern New Mexico.
        Storm totals included: 15 inches...15 miles north of
        Elizabeth...9 inches...5 miles south-southwest of Arapahoe
        Park; 8 inches in Highlands Ranch...5 miles south-
        southeast of Sedalia; 6.5 inches...8 miles southwest of
        Bennett and 6 inches in Parker. At Denver International...
        only 1.5 inches of snowfall was observed.
20-22 In 1936...5.5 inches of snow fell over downtown Denver.
        Most of the snow...4.5 inches...fell on the 20th.
21    In 1920...the rare event of snow from a thunderstorm
        occurred in the city during the evening.  Brilliant
        flashes of lightning and loud peals of thunder were
        first noted at 7:35 PM.  Light rain began falling at
        8:30 PM...and light moist snow began falling a few
        minutes later.  Some soft hail was also seen falling
        with the rain and snow...but both melted almost as
        fast as they fell.  The hail only continued for a few
        minutes...and the rain and snow ceased about 9:40 PM.
        The snowfall was the first to occur in Denver this
        season.  The amount of precipitation at the station
        measured only 0.01 inch...but heavier amounts were
        reported from other parts of the city.  Snowfall was
        only a trace.
21-22 In 1978...heavy rain on the 21st changed to snow by daybreak
        on the 22nd and continued the rest of the day.  This was
        the first measurable snowfall of the season...but totaled
        only 1.7 inches at Stapleton International Airport where
        east winds gusted to 29 mph.  While only a trace of snow
        covered the ground...precipitation totaled 1.27 inches.

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