Public Information Statement
Issued by NWS Denver/Boulder, CO

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NOUS45 KBOU 090859

Public Information Statement
National Weather Service Denver/Boulder CO
259 AM MDT WED MAY 9 2018

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

8-9   In 1957...from the 8th to the 9th...intense heavy rain
        caused flash flooding on Toll Gate Creek in Aurora
        where 3 people were killed in a car. Up to 4 inches of
        rain fell in 5 hours in the Toll Gate Creek basin.
        The rain also caused flash flooding on Sand Creek in
        Aurora and Denver.  Rainfall totaled 3.29 inches
        at Stapleton Airport with most of the rain...2.34 inches...
        occurring on the 9th.
8-10  In 1979...from the 8th to the 10th...4.3 inches of snow
        fell at Stapleton International Airport where northwest
        winds gusted to 30 mph on the 8th. Most of the snowfall...
        2.3 inches...occurred on the 9th. High temperature of only
        35 degrees on the 9th equaled the record low maximum for
        the date.
9     In 1875...a heavy windstorm swept across the city for most
        of the day.  West-northwest winds averaged a sustained
        speed of 31 mph between 6:00 AM and 3:00 PM.  The peak
        wind was sustained to 45 mph at 9:50 AM.
      In winds were sustained to 40 mph with
        gusts as high as 43 mph.  Only a trace of rain fell.
      In 1941...a tornado was noted at 2:20 PM to the northeast
        of downtown and was followed by another similar shaped
        cloud or dust roll estimated 3 miles behind.  Thick dust
        followed with heavy gusts of wind.  The temperature fell
        15 degrees in 10 minutes following the twister.  The mild
        tornado did little damage except to unprotected frame
        structures.  Winds were sustained to 50 mph with the
        passing of the tornado at Stapleton Airport.  It was
        visible to observers for 10 minutes and was lost from
        sight as it traveled east into huge rolls of dust.  Hail
        and rain followed with a few hailstones as large as 1/2
        inch in diameter downtown.  No damage was reported from
        the hail.  Thunderstorm winds sustained to 31 mph produced
        blowing dust downtown.  Precipitation was only 0.07 inch.
      In 1983...streams swollen by recent rain and snowmelt caused
        an earthen dam to collapse...washing out portions of State
        Highway 67 near Deckers in southern Douglas county.
      In 1992...three boys...ages 11...12...and 16...were struck by
        lightning while taking cover under a large tree during a
        thunderstorm in Jefferson County...just 7 miles northwest
        of Denver.  The three were seriously injured.
9-10  In 1889...from the 9th to the 10th...heavy rainfall totaled
        2.15 inches in downtown Denver.  The cold rain was mixed
        with snow at times overnight.  Temperatures on the 10th
        ranged from a  high of 38 degrees to a low of 32 degrees
        with north winds sustained to 22 mph.
      In 2003...a late spring snowstorm hammered the mountains...
        eastern foothills...and urban corridor.  The heaviest
        snowfall occurred north of Interstate 70.  The heavy
        wet snow caused damage to trees throughout metro Denver
        and downed power lines.  About 40 thousand people along
        the urban corridor were without power.  Storm total
        snowfall amounts included:  11.5 inches in Louisville...
        8 inches in Boulder and Broomfield; 7 inches in Denver International Airport...
        and at the site of the former Stapleton International
        Airport; and 6 inches 4 miles east of Denver.  Snowfall
        ranged from 4 to 9 inches across extreme southern Weld
        County.  In the foothills...15 inches of snow fell near
        Jamestown...9 inches at Rollinsville and Rawah...with
        8 inches at Chief Hosa and atop Lookout Mountain.
        The snow was accompanied by thunder on the afternoon
        of the 9th at Denver International Airport where west
        winds gusted to 25 mph on the 9th and north winds gusted
        to 22 mph on the 10th.
      In 2015...from the 9th to the 10th...a strong storm system
        brought  heavy snow to areas in and around Denver.
        Moderate to heavy rain showers transitioned over to
        snow by early in the evening on the 9th. Heavy
        wet snow overnight caused many trees to break under the
        pressure of the sudden weight. Tree damage ranged from
        minor to significant...with old growth trees losing
        large limbs and new trees sustaining fatal damage. Power
        outages affected about 43350 Xcel Energy customers in
        metro Denver. The Intermountain Rural Electric
        Association also reported about 1000 power outages in
        the Strasburg areas. In the high country...CDOT shut
        down Interstate 70 between the Eisenhower Tunnel and
        Silverthorne due to multiple crashes.

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