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Public Information Statement
National Weather Service Denver/Boulder CO
259 AM MDT MON AUG 4 2025

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

3-4   In 1988...overnight from the 3rd to the 4th...two inches of rain
        fell in 3 hours at both Morrison and Wheat Ridge. Thunderstorm
        rainfall totaled 0.80 inch overnight at Stapleton International
        Airport.
4     In 1889...southwest winds were sustained to 42 mph with
        an extreme velocity to 52 mph.
      In 1924...0.01 inch of rain fell over downtown Denver.  This
        along with the 0.01 inch of rainfall on the 10th was the
        only rainfall of the month...the driest August on record.
      In 1963...heavy rains in the foothills above Idaho Springs
        caused mud and rock slides which closed U.S. Highways 6
        and 40 for a time.
      In 1976...hail to 1 inch diameter was reported 12 miles
        southwest of Denver.  Hail to 3/4 inch in diameter was
        reported in Lakewood.  Small hail...1/4 to 1/2 inch in
        diameter...fell at Stapleton International Airport.
      In 1982...heavy rain poured through the roof of a clothing
        store in Aurora...causing widespread water damage.  The roof
        was being repaired when the storm hit.
      In 1983...hail up to one inch in diameter fell in Aurora
        where heavy rain produced street flooding.
      In 1984...a Colorado State Trooper was struck and injured by
        lightning in Northglenn.
      In 1989...a microburst wind gust to 52 mph was recorded at
        Stapleton International Airport.
      In 1997...lightning sparked a small fire in a home in Arvada...
        causing minor damage.  Several intersections in both Arvada
        and Westminster were flooded by thunderstorms producing
        heavy rain.  Several cars were damaged by the high waters...
        and a number of businesses were flooded.
      In 1999...flooding and flash flooding problems developed over
        metro Denver as slow moving thunderstorms dumped from 2 to
        3.5 inches of rainfall in about 3 hours.  Near the junction
        of I-25 and U.S. Highway 36...up to 4 feet of water flooded
        an auto dealership.  About 45 cars were ruined.  Damage
        estimates to the dealership alone totaled nearly a half
        million dollars.  Sections of I-25 and U.S. 36 near the
        interchange were closed due to floodwaters.  Floodwaters...
        up to 5 feet deep...forced the evacuation of two mobile
        home parks in Federal Heights.  Railroad tracks were
        washed out near Federal Blvd. and 64th Avenue.  Numerous
        power outages caused widespread blackouts in Thornton and
        Littleton.  Along Massey Draw near Carr St. and Chatfield
        Reservoir...4 homes were flood damaged and portions of their
        backyards washed out.  Widespread street flooding was also
        reported in Boulder where several buildings were flood
        damaged...including the University of Colorado Memorial
        Center.
      In 2004...two golfers were shocked when lightning struck the
        eighth green of the golf course at Castle Pines north of
        Castle Rock.  The two men suffered only minor injuries.
        Heavy thunderstorm rain from the same storm caused flash
        flooding.  Floodwaters rushed across parts of U.S. Highway
        85 near the entrance to the Castle Pines Golf Club.  The
        traffic lanes were covered with up to 6 inches of running
        water.
      In 2008...lightning sparked a grass fire that consumed 300
        acres on the northern edge of Green Mountain...in Jefferson
        County.  Gusty winds and very dry conditions allowed the
        wildfire to quickly spread and threaten several houses.
        Fortunately...only minor damage was reported to homes due
        to smoke and melted siding.
      In 2018 a severe thunderstorm produced strong winds in and
        around Denver.  A peak wind gust to 60 mph was observed
        near Firestone with a gust to 59 mph near Buckley Air
        Force Base.  A peak wind gust to 40 mph from the southwest
        was observed at Denver International Airport.

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