Public Information Statement
Issued by NWS Denver/Boulder, CO

Home | Current Version | Previous Version | Text Only | Print | Product List | Glossary On
Versions: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50
NOUS45 KBOU 310859

Public Information Statement
National Weather Service Denver/Boulder CO
259 AM MDT MON JUL 31 2017

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

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
27-31 In 1956...96 percent of the total precipitation for the month
        of July occurred over the last five days of the month.
        Heavy thunderstorms produced 4.00 inches of rainfall at
        Stapleton Airport.  This amount of precipitation in 5 days
        or less had been exceeded only 3 times in previous record.
        The last time had been in December of 1913 as snow.
        Considerable property damage occurred across metro Denver
        from flooding.
31    In 1873...the all-time lowest recorded temperature in July...
        42 degrees...occurred.  The same temperature also occurred
        on July 4...1903.
      In 1874...during the late afternoon rain and hail fell for
        5 minutes followed by brief heavy rain.  Pieces of solid
        ice of irregular shape fell upon the roof of the station.
        The hail stones measured 1 1/2 inches in diameter.
        Precipitation (rain and melted hail) was only 0.16 inch.
      In 1889...the high temperature climbed to 100 degrees in
        downtown Denver.
      In 1919...heavy thunderstorm rainfall totaled 2.59 inches in
        downtown Denver during the evening.  Rainfall was 1.90
        inches in an hour...a new record at that time.
      In 1961...over an inch of rain in a short period of time caused
        flooding of streets and basements in Denver.  Rainfall
        totaled 1.30 inches at 11th and Lincoln in central Denver.
      In 1964...the temperature reached 91 degrees in Denver...making
        this the 27th day of the month that the temperature reached
        90 degrees or more.  This is the all time record for 90
        degree days in a month in Denver.
      In inch diameter hail fell in Hudson northeast of
      In 1976...during the evening hours extremely heavy thunderstorm
        rains produced flash flooding in Big Thompson Canyon which
        killed 144 people between Estes Park and Loveland.  No
        significant weather occurred in metro Denver at the time.
      In 1987...1 inch diameter hail fell in Lakewood and 3/4 inch
        hail fell near Louisville.  Southeast Boulder County was
        drenched with 1.25 inches of rain in just 20 minutes.
      In 1993...thunderstorm winds damaged a chimney of a home near
      In 1996...a weak tornado (F0) was sighted 12 miles east of
        Denver International Airport.  No damage was reported.
      In 1998...heavy monsoonal thunderstorm rain triggered a mud
        slide in Blackhawk.  The mudslide blocked Main St. and
        caused an estimated half million dollars in damage to a
        casino.  Heavy thunderstorm rain...up to 3 inches in an
        hour...caused a flash flood along Buffalo Creek.  Portions
        of County Road 126 just south of the town of Buffalo
        Creek were washed out.  The flood waters nearly washed
        away the bridge as mud and debris slammed into the
        structure.  Hail to 1 3/4 inches in diameter fell near
        Idaho Springs.
      In 2004...severe thunderstorm winds toppled a 65-foot blue
        spruce tree in Parker.  The tree landed on a home damaging
        the roof and gutters.  The downed tree poked dozens of holes
        into the shingles.
      In 2013...severe thunderstorm winds...with gusts estimated to 80
        mph...downed power poles which caused scattered outages in and
        around Byers...Bennett and Strasburg. Some property damage was
        also observed. Near Byers...aluminum siding and roofing was
        peeled off sheds. Large hail...up to one inch in diameter...was
        reported north of Bennett.  At Denver International Airport...
        a peak wind gust to 40 mph was observed from the northeast.

$$ is the U.S. government's official web portal to all federal, state and local government web resources and services.