Public Information Statement
Issued by NWS Denver/Boulder, CO

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NOUS45 KBOU 190859

Public Information Statement
National Weather Service Denver/Boulder CO
259 AM MDT WED JUL 19 2017

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

7-25  In 1934...a streak of 15 consecutive days of 90 degrees
        ranked 5th on the list of hot streaks.  The record of
        24 consecutive days was established in the summer of
13-5  In 2008...a streak of 24 consecutive days of 90 degrees
        shattered the previous record of 18 consecutive days
        established in 1901 and 1874. new single
        day record high temperatures were set in the month of July.
        In August however...a record of 104 degrees was set on the
        1st...and another record of 103 degrees was set on the 2nd.
        In addition...a record low min of 70 degrees was set on
        August 2nd.
18-19 In 2003...heavy rain producing thunderstorms caused flash
        flooding across southern metro Denver.  Automated rain
        gages measured 2 to 3 inches of rain in less than an
        hour.  The heavy rainfall caused many intersections and
        underpasses to flood...stranding motorists.  Sections of
        I-25 and I-225 were closed due to the high water.
18-2  In 1987...a streak of 16 consecutive days of 90 degrees
        ranked 4th on the list of hot streaks.  The record of
        24 consecutive days was established in the summer of
19    In 1875...recent heavy rains produced high waters on many
        creeks and rivers in the area...which threatened the
        destruction of property at some locations.  Cherry Creek
        in the city was running the highest in 10 years.  Heavy
        rain in the mining regions over the last 2 days resulted
        in water running "everywhere" and the suspension of some
      In 1881...a thunderstorm passing across the city produced
        lightning with no rain.  A woman was seriously injured
        when struck by lightning several blocks from the weather
        office in downtown Denver.
      In 1934...the temperature reached a high of 100 degrees in
        downtown Denver.
      In 1965...hail...rain...and lightning hit west metro Denver.
        Hail stones as large as 1 1/2 inches in diameter accumulated
        to a depth of 2 inches in Evergreen where 2.95 inches of
        rain in 2 hours caused some flooding in the business section
        of the town.  Lightning caused some power outages.
      In 1973...two funnel clouds were observed 5 miles southeast of
        Littleton.  The same funnel clouds were observed for 20
        minutes...5 miles west and 5 miles west-southwest of Arapahoe
        County Centennial Airport.
      In 1975...lightning injured a man in Denver and caused power
        outages in Aurora...Lakewood...Westminster...and west Denver.
      In 1984...strong thunderstorm winds gusting to 45 mph shattered
        7 large plate glass windows at Stapleton International
      In 1985...a tornado touched down in the Surrey Ridge area of
        northern Douglas County...just west of I-25.  Ten homes were
        damaged; one under construction was nearly destroyed.  Two
        vehicles were thrown off I-25 injuring three people.  A
        pick-up truck was thrown 50 feet by the twister.  In
        addition...a cluster of severe thunderstorms pounded all
        of metro Denver with torrential rain...hail...and wind.  The
        heaviest rain fell in Aurora where one location reported
        2.37 inches in just 40 minutes.  One location in northeast
        Aurora received a total of 4.30 inches from the storm.
        There was extensive street and basement flooding...and a
        number of roads were damaged or washed out.  An Aurora boy
        suffered minor injuries when he was washed into a drainage
        ditch.  Golf ball size hail in Aurora piled up to 5 inches
        deep.  An inch of rain fell in 20 minutes at Stapleton
        International Airport...closing it to air traffic for an
        hour.  Up to 1 1/2 inches of rain fell in just 15 minutes
        over central Denver with the high water closing I-25.  The
        water was so deep on the freeway...that one vehicle was
        completely submerged and people were diving into the water
        from the freeway overpass.  Three homes in Littleton were
        damaged by lightning.  Wind blew out several windows from
        a high rise apartment building in southeast Denver.
        Rainfall totaled 1.51 inches at Stapleton International
      In 1997...torrential rain and damaging hail pummeled eastern
        sections of metro Denver.  Hail up to 1.25 inches in
        diameter fell at the National Weather Service office on the
        site of the former Stapleton International Airport.  The
        hail continued for about 15 minutes and accumulated to a
        depth of 2 to 3 inches...causing extensive damage to cars in
        the area.  Heavy rainfall totaled 3.83 inches in about an
        hour from the nearly stationary thunderstorm.  Numerous cars
        stalled along I-70...and several homes were flooded in east
        Denver.  The roof of a building collapsed under the weight
        of the water.  The next day several "fatalities" were
        discovered near the National Weather Service office; two
        prairie dogs were found dead along with three rabbits that
        either drowned or were killed by the large hail.
      In 1999...lightning struck two residences in Littleton...but
        caused only minor damage.  Lightning triggered a fire at a
        residence in Cherry Hills Village.  A small portion of the
        roof and ceiling were damaged before the fire could be
      In 2000...hail as large as 1.25 inches in diameter fell near
        Roggen northeast of Denver.
      In 2004...heavy rainfall caused flooding on the Virginia Canyon
        Road near Idaho Springs...which had to be closed for repairs.
      In 2006...the temperature climbed to a high of 100 degrees.  The
        high temperature was not a record maximum for the date.
     In 2007...a severe thunderstorm produced large hail...up to 1
        inch in diameter...about 6 miles north of Northglenn.
19-23 In 2005...the high temperature climbed above 100 degrees on
        each of the 5 days with readings of 101 on the 19th...105 on
        the 20th...104 on the 21st...and 102 on both the 22nd and 23rd.
        A new record maximum temperature for the month of July of 105
        degrees was set on the 20th...which also equaled the all time
        record maximum for Denver of 105 degrees first set on August
        8th in 1878.  Daily maximum temperature records were set on
        each day...and the 5 day period equaled the record for the
        most consecutive days of 100 degrees or more first set from
        July 4th through 8th in 1989.  The intense heat resulted in
        a high use of electricity for cooling purposes.  The demand
        for electric power exceeded the supply and rolling black-outs...
        each lasting about an hour...were scheduled across metro Denver
        during the afternoons and early evenings.

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