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Public Information Statement
National Weather Service Denver/Boulder CO
259 AM MDT SAT JUN 22 2024

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

21-22 In 1941...strong thunderstorms produced cloudbursts of rain
        in Boulder County...starting during the late evening of the
        21st and continuing overnight into the 22nd.  The heavy
        rains over the Boulder Creek...Left Hand Creek...and South
        St Vrain River basins produced flooding in already swollen
        streams and turned dry gulches into raging torrents.  The
        force of the floodwaters swept a man from the arms of his
        wife to his death...severely damaged canyon homes and swept
        others away...and hurtled a car down a steep embankment
        after the driver narrowly escaped.  West of Boulder...the
        Boulder Canyon highway was littered with rocks and debris
        and collapsed when two culverts were washed away.  The
        flood waters washed much debris down Four Mile Canyon...
        damaging the road near the creek bed.  A bridge over Dry
        Creek just south of Niwot was completely washed away.
      In 1964...scattered hail and rain caused property damage and
        local flooding in Boulder.
      In 1989...an unseasonably cold weather system produced strong
        winds over much of metro Denver and snowfall in the
        foothills as low as 7500 feet elevation.  One to 6 inches
        of snow fell in the foothills west of Denver with 15 inches
        reported on the summit of Mount Evans.  Six inches of snow
        were measured at Conifer.  Rainfall totaled only 0.09 inch
        at Stapleton International Airport where northwest winds
        gusted to 29 mph on the 21st.
22    In 1872...small sandstorms...frequently seen on the prairie...
        occasionally passed through the city.
      In 1983...3/4 inch hail was observed at Deckers...and a
        thunderstorm produced wind gusts to 55 mph at Littleton.
      In 1988...a tornado was spotted one mile east of Brighton; it
        remained on the ground for about 6 minutes...but did no
        reportable damage.  Lightning damaged a home near Castle
        Rock.
      In 1991...thunderstorms produced golf ball size hail in
        Lafayette.  The strongest storms occurred north of metro
        Denver.
      In 1992...nickel size hail was reported just east of Parker.
      In 1995...large hail 3/4 to 1 3/4 inches in diameter fell in
        Castle Rock where a funnel cloud was sighted.  Hail 3/4
        inch to 1 inch in diameter fell in south Denver and Aurora.
        A funnel cloud was also sighted over Chatfield Reservoir.
        In Bennett...very strong dry microburst winds of unknown
        speeds ripped a 14-foot by 48-foot metal roof off of a
        barn. The roof was tossed approximately 250 yards. A few
        150- pound railroad ties were moved 10 to 15 feet.
      In 1997...a tornado touched down near the Adams County
        Fair Grounds northeast of Denver...uprooting several
        trees and damaging a car.  A dry microburst produced
        a brief wind gust to 69 mph at Jefferson County Airport.
        A small brief tornado was sighted near Hudson...but did
        no reported damage.
      In 1998...3/4 inch hail fell near Hudson.
      In 1999...thunderstorm winds gusted to 63 mph at Denver
        International Airport.
      In 2003...hail as large as 2 inches in diameter was measured
        in Fort Lupton with 3/4 inch hail in Erie and near
        Boulder.
      In 2006...a small tornado (F0) touched down near Franktown...
        but caused no damage.
      In 2008...strong winds from dry microbursts developed over
        parts of southern Weld and western Arapahoe Counties.
        A peak gust of 60 mph was observed in Centenniel.
        Near Frederick...strong winds snapped 3 power poles and
        sparked a small grassfire near State Highway 52 and
        Interstate 25.  At Denver International Airport...a peak
        gust of 31 mph was observed.
      In 2009...hail up to 2 inches in diameter was observed near
        Crescent in Boulder County.
      In 2023...an tornado touched down just south of CO-470
        in Highlands Ranch and lifted just west of I-25 near Lone
        Tree in Douglas County.  Most of the damage was EF0 but
        there were some pockets of EF1 damage; it was on the
        ground for 26 minutes.  The severe thunderstorm also
        produced large hail up to 2 1/2 inches in diameter.  The
        tornado track was from 2 miles west of Highlands Ranch to
        2 miles north-northeast of Surrey Ridge with a path length
        of 8.36 miles.  The maximum width of the tornado was
        approximately 50 yards There were no injuries.
22-26 In 2012...from the 22nd to the 26th...the maximum temperature
        exceeded 100 degrees for five consecutive days.  Two of
        the high temperatures on the 25th and 26th peaked at 105
        degrees...which set the all time record for the month of
        June and tied the all-time maximum temperature for Denver.

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