Public Information Statement
Issued by NWS Denver/Boulder, CO

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NOUS45 KBOU 250859

Public Information Statement
National Weather Service Denver/Boulder CO
259 AM MDT TUE JUL 25 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
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.
24-25 In 2003...maximum temperature of 100 degrees on the 24th was a
        record high for the date.  Low temperature of 73 degrees
        on the 25th was a record high minimum for the date.
25    In 1875...brief heavy rain and hail lasted only 5 minutes...
        but the 1/4 inch diameter hail covered the ground to a
        depth of 1/2 inch and made the streets look like there
        had been snowfall.  There was much crop damage...especially
        to corn...and some sheep were killed.  Precipitation totaled
        0.51 inch in the city.
      In 1896...a heavy thunderstorm produced sustained northwest
        winds to 45 mph with gusts to 50 mph and 1.02 inches of
      In 1965...a cloudburst dumped 1.99 inches of rain in 30
        minutes at Stapleton International Airport.  The storm was
        accompanied by strong winds gusting to 70 mph.  The heavy
        rain flooded numerous streets in east Denver and Aurora.
        One inch diameter hail accompanied a cloudburst...9 miles
        southwest of Denver.  A funnel cloud was sighted 25 miles
        northwest of Denver.  In Aurora...there were unofficial
        reports of 2.30 inches of rain in 40 minutes and 3.30
        inches of rain in 30 to 40 minutes.  Rainfall totaled 2.05
        inches at Stapleton International Airport.  Rainfall of
        2.42 inches for 24 hours on the 24th and 25th was the
        second greatest on record for July.
      In 1977...a tornado touched down briefly in Aurora southeast
        of Cherry Creek Reservoir.  No damage was reported.
        A funnel cloud was sighted for 4 minutes by National
        Weather Service personnel 10 miles north of Stapleton
        International Airport near Henderson.
      In 1991...heavy rain...up to half an inch in 10 minutes...caused
        flooding in Westminster...Northglenn...and north Denver where
        a section of railroad track was washed away.  At Stapleton
        International Airport...heavy thunderstorm rain totaled 1.85
        inches and briefly reduced the visibility to 1/4 mile.
        Hail to 1/8 inch in diameter was also measured.  A tornado
        touched down briefly near Fort Lupton.  No damage was
      In 1998...heavy monsoonal thunderstorm rains caused flooding
        and flash flooding in eastern and southern sections of
        metro Denver...including Englewood and Aurora...when about 2
        to 3 inches of rain inundated the area.  Both I-25 and I-70
        were closed for 2 to 3 hours as several low lying areas
        became impassable due to the high waters.  The water was
        estimated to be 15 feet deep in one flooded underpass along
        I-25.  As a result...the freeway was closed from south of
        6th Avenue to University Blvd.  Standing water forced the
        closure of I-70 at Gun Club Road east of Denver.  In
        Englewood...U.S. Highway 285 was closed...when high water
        made it impassable.  Several cars were reportedly floating
        down the roadway near Sheridan Blvd.  In Aurora...the
        intersection at Yale Ave. and Chambers Rd. was flooded by
        high water up to 4 feet deep when a spillway on the High
        Line Canal was breached.  Lightning also knocked out 11
        transformers across metro Denver...causing several small
        fires and scattered power outages.  Flood and flash
        flooding also occurred north of Strasburg when as much
        as 2.51 inches of rain fell in an hour.  The deluge
        resulted in considerable flooding of local streets and
        county roads.  Torrential rainfall of 2 to 3 inches in
        less than an hour triggered a flash flood in Virginia
        Canyon.  County Road 279 between Idaho Springs and
        Central City was closed for two days to clear debris
        from mudslides.  Several cars in Idaho Springs were
        washed off the road...and numerous basements were flooded
        in town.  Thunderstorm rainfall totaled 2.69 inches at
        Denver International Airport.
      In 2001...lightning struck two homes in Lafayette...damaging
        the roof and attic of one and shorting out the electrical
        system in another.  Hail to 1 3/4 inch in diameter was
        measured 7 miles north of Castle Rock with 3/4 inch hail
        7 miles north of Sedalia.
      In 2005...heavy thunderstorm rain in the vicinity of the
        Overland Wildfire burn scar triggered a mudslide in
        Jamestown.  Rocks the size of bowling balls...along with
        silt and mud slid down the mountain into the town.  No one
        was injured.  One parked car was buried by the debris.
      In 2006...heavy thunderstorm rainfall caused flash flooding
        1 mile north of the town of Westcreek in southwestern
        Douglas County.  Several maintenance roads were washed out
        by the floodwaters.

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