Public Information Statement
Issued by NWS Denver/Boulder, CO

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NOUS45 KBOU 020859

Public Information Statement
National Weather Service Denver/Boulder CO
259 AM MDT SUN JUL 2 2017

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

29-2  In 1990...almost a year to date after the record breaking heat
        in early July 1989...the third longest heat wave in Denver
        history started.  From June 29th through July 2nd the
        temperature reached 100 degrees or more on four consecutive
        days.  The highest reading of 102 degrees occurred on the
        29th...30th...and 1st.  Combined with the 102 degree reading
        on June 27th this would have been the longest heat wave on
        record...but the temperature climbed to only 98 degrees on
        June 28th.
29-15 In 2000...the 29th marked the beginning of a near record hot
        streak for metro Denver.  The high recorded
        at Denver International Airport...exceeded the 90 degree mark
        for 17 consecutive days from June 29th through July 15th.
        The record of 24 consecutive 90 degree or above days was
        set from July 13th through August 5th...2008.
1-18  In 1874...a streak of 18 consecutive days of 90 degrees
        tied for second with another streak that was later set
        in the summer of 1901. The record of 24 consecutive days
        was established in the summer of 2008.
1-31  In was the hottest July on record in Denver since
        weather records began in 1872.  The average temperature for
        the month was 78.9 degrees which was 4.7 degrees above
        normal. There were 27 days in which the high temperature
        equaled or exceeded 90 degrees...which established a new
        record.  There were also 7 days in which the temperature
        equaled or exceeded 100 degrees which tied the record
        set in 2005.
2     In 1879...a severe hail storm produced considerable damage
        in the vicinity of Arvada.  Some of the stones were
        unusually large...measuring 6.5 inches in circumference
        (2 inches in diameter) with an average weight of 1 ounce.
        The stones were uniformly large with one side concave.
        The greatest damage was to early wheat...cabbage...and vines.
        A tree just to the south of the weather station in downtown
        Denver was struck by lightning.  Residents in the house
        15 feet away were affected by the strike.
      In 1885...thunderstorm winds were sustained to 50 mph in the
      In apparent cold front produced sustained northeast
        winds to 40 mph with gusts to 45 mph.
      In 1955...a apparent microburst wind gust to 69 mph was
        recorded at Stapleton Airport where the brief strong wind
        reduced the visibility to zero in blowing dust.
      In 1965...hail...up to 2 inches in diameter...struck southwest
        Adams and northeast Denver counties...damaging
        and foliage.  Hail accumulated up to a foot deep.  Wind
        gusts to 48 mph and hail to 1 inch in diameter fell at
        Stapleton International Airport where the large hail broke
        three storm windows and shredded shrubs at the U.S. Weather
        Bureau upper air building.
      In 1968...a pilot reported a tornado 10 miles southeast of
      In inch diameter hail stones were reported in Adams
        County about 30 miles east of Denver.
      In 1987...a large tornado touched down 10 miles northeast of
        Stapleton International Airport.  The tornado was vertical
        and thick and kicked up a large dust and debris cloud. developed a sinuous rope-like shape as it slowly
        dissipated.  The tornado was visible for 15 minutes.  The
        twister occurred in open country and did only minor damage
        to a metal shed...porch...and mailbox.  A man was killed by
        lightning in southwest Aurora.  He was in his backyard and
        had a shovel in his hand at the time of the strike.  A group
        of soccer players were hit by lightning on a field in
        Boulder.  A 10-year-old boy was critically injured and
        hospitalized; fortunately he recovered.  Six other people
        were knocked to the ground by the strike.  Two of these were
        slightly injured.  Golf ball size hail fell just east of
        Littleton and at Highlands Ranch.  Hail as large as 3/4 inch
        in diameter was reported in Aurora and Parker and near Hudson
        and Franktown.
      In 1988...a 45-year-old man was injured by lightning at Cherry
        Creek Reservoir.  Administration of CPR probably saved his
      In 1990...the temperature reached a high of 100 degrees at
        Stapleton International Airport.
      In 1993...thunderstorm winds blew a roof off a barn near
        Parker...causing an estimated 15 hundred dollars damage.
      In 1994...thunderstorm winds downed power lines in Boulder...
        causing power outages.  Winds gusted to 66 mph in Boulder...
        64 mph in Arvada...and 60 mph in Golden.
      In 1998...a small tornado touched down briefly near Barr Lake...
        but caused no damage.
      In 2002...hail as large as 1 3/4 inches in diameter fell in
        the City of Denver and in Arapahoe County near Littleton.
        The low temperature of 69 degrees equaled the record high
        minimum for the date.
      In 2006...lightning struck a teenager in Castle Rock as he
        was mowing his lawn and listening to an iPod.  The teen
        suffered burns to his hands and feet...and had blood
        running from his ears when he was found.  The victim`s
        eardrums were ruptured...which damaged his hearing.
        Lightning also struck a house in Castle Rock causing
        extensive damage to the roof and side of the home.
        Heavy rains caused flash flooding at Castlewood Canyon
        State Park near Franktown.  The floodwaters destroyed
        four footbridges along the high trail.  A culvert and
        several roads were washed out in the area.  In addition...
        two driveways crossing Cherry Creek were washed out near
        Prairie Canyon Ranch.  Heavy rainfall also caused minor
        flooding on Murphy and Sand Creeks...just east of Buckley
        AFB.  Gun Club Road was closed between Alameda and
        Mississippi Avenues...north of the Murphy Creek Golf
        Course...where 3 feet of standing water reportedly covered
        the road.  A severe thunderstorm produced large hail to
        7/8 inch in diameter in south Aurora near Cherry Creek.

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