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Public Information Statement
National Weather Service Denver/Boulder CO
259 AM MDT SUN SEP 1 2024

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

1     In 1951...large hail pounded Boulder...causing thousands of
        dollars in damage to roofs and automobiles.  Heavy
        thunderstorm rainfall flooded basements and produced
        widespread street flooding.
      In 1966...severe thunderstorms caused local flooding in areas
        from Denver to the north and east.  There was scattered
        damage from hail and lightning.  Streets were flooded in
        Boulder...and streets and basements were flooded in several
        areas of metro Denver.  The public reported 1 inch
        diameter hail in Aurora and near Cherry Creek Reservoir.
        Thunderstorm rainfall totaled only 0.39 inch at Stapleton
        International Airport.
      In 1985...severe thunderstorms dumped heavy rain and hail at
        many locations along the Front Range from Denver south.
        The southern and eastern suburbs of metro Denver were
        especially hard hit.  Rainfall from 1 1/2 to 3 inches
        caused extensive street flooding in Aurora where two
        creeks rose out of their banks.  Two homes in the city
        suffered minor lightning damage.  Almost 4 inches of rain
        fell in the Parker area.  Hail up to ping-pong ball size
        piled up to a foot deep and closed a road in Evergreen.
        Hail as large as 1 3/4 inches in diameter was reported
        8 miles northeast of Deckers.  Wind gusts to 65 mph were
        estimated in southeast Aurora.
      In 1990...marble size hail piled up to 2 inches deep in the
        foothills community of Kittredge...18 miles southwest of
        Denver.  As much as half an inch of rain fell in just 15
        minutes and caused minor road and small stream flooding.
        A thunderstorm dropped pea to marble size hail and brief
        heavy rain near Ward Road and 64th Avenue in Arvada.
        Minor street and small stream flooding was reported in
        the area.
      In 1995...a strong thunderstorm microburst with only a few
        drops of rain produced a recorded wind gust to 85 mph at
        the site of the former Stapleton International Airport.
        The wind gust occurred at 8:30 PM MDT.  The all-time
        highest recorded temperature in September...97 degrees...
        occurred.  The same temperature also occurred on
        September 5...1899...September 4...1960...and September 4...
        1995.
      In 2019...the high temperature in Denver reached 98 degrees...
        which not only broke the record for the date...but also
        set a new monthly record for the month of September.
1-5   In 1995...record breaking heat occurred on the first 5 days
        of the month when the temperature climbed into the 90`s
        on each day.  Record high temperatures of 97 degrees on
        both the 1st and 4th equaled the all-time record maximum
        for the month.  High temperature of 95 degrees on the 3rd
        was a record for the date.  High temperatures of 94 degrees
        on both the 2nd and the 5th were not records.  The low
        temperature of 64 degrees on the 4th equaled the record
        high minimum for the date.
1-7   In 1978...the temperature reached 90 degrees or more on seven
        consecutive days with the highest temperature...94 degrees...
        recorded on both the 4th and 6th.
1-30  In 2020...a worsening drought that started in the spring and
        continued through September. Outside of an early season
        snow on the 8th...the month of September was another
        unseasonably warm and dry period. The combination
        of hot...mostly dry conditions...and critically dry fuels...
        resulted in a continuation and rapid expansion of several
        massive wildfires. The Cameron Peak fire...which became the
        largest in the state`s history started on August 13th...and
        continued through September. As a result...very poor air
        quality continued to impact Denver and the entire Front
        Range.  Denver recorded the most days ever with a high
        temperature of 90 degrees or better; 75 days.  The last
        of which was 91 degrees on the 24th.  The previous
        record was 73 days set in 2012.

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