Public Information Statement
Issued by NWS Denver/Boulder, CO

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Public Information Statement
National Weather Service Denver/Boulder CO
259 AM MDT SUN JUL 23 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.
18-2  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
19-23 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.
20-23 In 1961...unusually cool weather for July resulted in several
        temperature records.  Record minimum temperatures were
        set or equaled on each day with readings of 51...51...49...
        and 49 degrees.  High temperature of only 64 degrees on the
        21st was a record low maximum for the date.
20-25 In 1965...heavy showers and thunderstorms doused metro Denver
        with significant rain each day.  Rainfall for the six days
        totaled 5.16 inches at Stapleton International Airport.
        Massive rainfall occurred on the 20th...21st...and 25th...
        flooding streets and basements and causing streams to
        overflow.  The heaviest rainfall...2.05 Stapleton
        International Airport occurred on the 25th.
22-23 In 1991...heavy rains over the Palmer Divide and along the
        Front Range caused the South Platte River to flood from
        near Henderson to Fort Lupton.  The river was out of its
        banks at several locations with water covering the roads
        through the night.  Only minor damage was reported.
23    In 1901...the temperature climbed to a high of 90 degrees...
        marking the 18th consecutive day with a high temperature
        of 90 degrees or more.  This equaled the record of 18
        consecutive days set from July 1st through July 18th in
      In 1910...the temperature climbed to a high of 101 degrees
        in downtown Denver.
      In 1936...the high temperature reached 100 degrees in
        downtown Denver.
      In 1957...a tornado was observed by National Weather Service
        personnel 25 miles east-northeast of Stapleton Airport for
        7 minutes.  No property damage or injuries were reported.
        The public reported a funnel cloud 10 miles northeast of
      In 1960...lightning struck many locations across metro Denver.
        A Boy Scout leader was struck and injured at the Rocky
        Mountain Arsenal.  Some sections of Arvada were blanketed
        with a white layer of hailstones.  A number of weed fires
        were started by lightning.  Some houses were struck...but no
        serious damage occurred.  Heavy rain fell from northwest
        Denver to Brighton with up to 1.50 inches in some areas.
      In 1965...heavy rain flooded and damaged homes in Georgetown...
        where the sewer system was damaged and the water supply
        contaminated.  Heavy rains in Aurora washed out earthen
        bridges over Sand Creek.  Streets were flooded in Denver.
        Several highways were washed out to the east and southeast
        of Denver.
      In 1975...heavy rains caused flash flooding in the foothills
        west of Denver.  Several roads and businesses were damaged
        in the Central City and Blackhawk areas.
      In 1983...heavy thunderstorms blasted Denver and areas to the
        south.  Douglas county was hardest hit.  Golf ball size hail
        fell in and near Parker.  Many homes at the Pinery south of
        Parker had windows broken and paint stripped by the storm
        with some vehicles dented by the large stones.  In Parker...
        1.90 inches of rain fell in just 30 minutes.  Many roads in
        Douglas County were washed out...and at least one bridge was
        damaged.  Up to 2 inches of rain fell in Lakewood...and
        Littleton was drenched by 1.60 inches in 15 minutes.  A
        department store in Lakewood suffered water damage when a
        pipe handling runoff broke...sending 4 inches of water onto
        the floor of the store.
      In 1990...a thunderstorm wind gust to 53 mph was recorded at
        Stapleton International Airport...where 1/8 inch diameter
        hail fell.
      In 1992...heavy thunderstorm rains caused Howard Gulch in
        southeast Denver to flow over its banks.  A weather spotter
        recorded thunderstorm wind gusts to 63 mph in Aurora.
        Another spotter measured a wind gust to 60 mph...which
        toppled a large tree.  Thunderstorm winds gusted to only
        41 mph at Stapleton International Airport.
      In large as an inch in diameter...fell 5 miles
        west of Castle Rock.
      In 1997...damaging thunderstorm winds associated with a wet
        microburst ripped the roof off a barn near Brighton...
        causing the east side of the structure to collapse.  The
        roof of a nearby utility shed was also lifted off and blown
        60 feet away.  West winds gusted to 38 mph at Denver
        International Airport.
      In 2001...a severe thunderstorm pelted Littleton with hail as
        large as 1 1/2 inches.  Total damage to vehicles...roofs...
        buildings...and landscaping totaled over 600 thousand
        dollars.  Rain leaked into offices...damaging computers.
        Almost every vehicle parked in the Littleton Center lot
        sustained some hail damage.  Thunderstorm winds gusted to
        55 mph at Denver International Airport.
      In 2002...a small tornado briefly touched down near Bennett.
        No damage was reported.
      In 2004...heavy thunderstorm rainfall in the Overland fire
        burn area caused flash flooding in Jamestown.  Up to a foot
        of water reportedly covered the highway near Jamestown.
        Many of the town`s culverts filled with dirt and debris...
        causing the overflow to wash onto streets and into homes.
        Heavy machinery had to be used to remove piles of mud
        up to 7 feet deep.  Parked cars slid down the street
        with the mud and water...and many had to be dug out.  The
        fire station in Jamestown was inundated with 10 inches of
        muddy water.  Heavy thunderstorm rainfall caused street
        flooding in Federal Heights and Thornton.  Several streets
        were inundated with 2 to 4 feet of water...including 84th
        Avenue and Grant Street...Conifer Street and Huron Blvd....
        102nd Ave. and well as 83rd Ave. and Washington.
        Several cars were stranded in the flood waters.  Heavy
        rainfall also caused street flooding in parts of Westminster.
        Water reportedly flowed into car windows just north of 104th
        Avenue and U.S. Highway 36.  Sections of two roads had
        to be closed due to flooding.  Heavy thunderstorm rainfall
        of up to 2 inches in 45 minutes caused flash flooding just
        east of Aurora.  Floodwaters ranging from 2 to 3 feet deep
        forced the closure of Powhaten...Gun Club and Picadilly Roads.
        Lightning caused power outages in parts of Arvada.  About
        9800 customers were without power for up to 90 minutes.

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