Public Information Statement
Issued by NWS Denver/Boulder, CO
NOUS45 KBOU 280045
Public Information Statement
National Weather Service Denver/Boulder CO
645 PM MDT SAT AUG 27 2016
...This week in metro Denver weather history...
19-30 In 1875...grasshoppers appeared in great numbers at 10:00 AM
on the 19th. Thousands landed on the ground. The streets
were literally covered with them. Swarms of grasshoppers
were seen on each day. All gardens in the city were
devastated...and in the countryside the grasshoppers were
very destructive to ripened grain. On the 30th the
grasshoppers were so numerous as to almost darken the sun.
27-28 In 2004...a brief chilly spell resulted in three temperature
records. The high temperature of 55 degrees on the 27th
was a record low maximum for the date. The low temperature
of 48 degrees on the 27th equaled the record minimum for
the date. The low temperature of 42 degrees on the 28th
was a record minimum for the date.
28 In 1887...a dry thunderstorm produced north winds to 48 mph
but only a trace of rainfall.
In 1968...one man was seriously injured by lightning while
riding on a roller coaster at a Denver amusement park. An
airline employee was injured when lightning struck a
jetliner he was servicing at Stapleton International
Airport. A lightning-caused fire did extensive damage to
one house and minor damage to several others in the City of
In 1970...a microburst wind gust to 53 mph was recorded at
Stapleton International Airport.
In 2002...a severe thunderstorm produced 3/4 inch diameter
hail near Parker.
In 2005...lightning sparked a small fire near Jamestown. The
blaze was quickly contained and consumed less than an acre.
29 In 1876...after the passage of a gentle rain shower to the east
during the late evening hours...the moon shone brightly and
a remarkably bright lunar rainbow appeared.
In 1910...an apparent cold front produced sustained northeast
winds to 40 mph.
In 1946...the high temperature warmed to only 55 degrees...the
record low maximum for the month.
In 1989...a spectacular lightning display knocked out power to
300 blocks in southeast Denver. One bolt started a fire in
a lumber yard in the northeast part of the city...and the
attic of a home in the same area was set ablaze by a
In 1996...3/4 inch diameter hail was measured in Parker.
In 2000...lightning struck two homes in Thornton. The extent
of damage was unknown.
In 2002...two small tornadoes caused damage in southeast metro
Denver. The first tornado...associated with a multi-vortex
storm...touched down briefly near E-470 and South Jordan
Road. Some fences were damaged...and a few trees were blown
down. A few of the homes also sustained minor roof damage.
Damage from this storm totaled 100 thousand dollars. The
second tornado associated with the storm touched down in a
subdivision that was under construction at Gartrell and
Arapahoe roads. Four large condominiums under construction
were destroyed. The most heavily damaged portions of the
structures were still in the framing stages. Adjacent
sections where enclosed walls were in place were not
destroyed. A man suffered 4 broken ribs and several cuts
and bruises when the trailer he sought shelter in was
flipped three times and torn apart by the twister. Damage
from this storm totaled 6 million dollars. A severe
thunderstorm produced 1 inch diameter hail near Evergreen.
In 2006...severe thunderstorms produced large hail in the
foothills west of Denver. Hail to 1 inch in diameter fell
near Blackhawk. Hail as large as 7/8 inch was measured
near Idaho Springs...along with 3/4 inch hail near Nederland
30 In 1981...60 mph winds were reported in Boulder.
In 2004...a severe thunderstorm produced hail as large as
1 inch in diameter in south Aurora near Cherry Creek.
31 In 1951...hail as large as 1 3/4 inches in diameter caused
an estimated 300 thousand dollars damage in metro Denver.
Hail as large as 1 1/2 inches in diameter was measured
at Stapleton Airport.
In 1978...strong thunderstorm winds tore the roof off an
apartment building in Aurora...downed trees...and damaged
windows in Denver. A microburst wind gust to 58 mph was
recorded at Stapleton International Airport.
In 1985...a thunderstorm wind gust to 60 mph was clocked at
Buckley Field in Aurora.
In 1997...hail to 1 1/4 inches in diameter was measured in
In 2006...a female postal worker was struck and injured by
lightning while delivering mail in Westminster.
In 2008...lightning struck a home in Brighton...damaging the
roof and a bedroom. The damaged totaled 20 thousand
1 In 1951...large hail pounded Boulder...causing thousands of
dollars in damage to roofs and automobiles. Heavy
thunderstorm rainfall flooded basements and produced
widespread street flooding.
In 1966...severe thunderstorms caused local flooding in areas
from Denver to the north and east. There was scattered
damage from hail and lightning. Streets were flooded in
Boulder...and streets and basements were flooded in several
areas of metro Denver. The public reported 1 inch
diameter hail in Aurora and near Cherry Creek Reservoir.
Thunderstorm rainfall totaled only 0.39 inch at Stapleton
In 1985...severe thunderstorms dumped heavy rain and hail at
many locations along the Front Range from Denver south.
The southern and eastern suburbs of metro Denver were
especially hard hit. Rainfall from 1 1/2 to 3 inches
caused extensive street flooding in Aurora where two
creeks rose out of their banks. Two homes in the city
suffered minor lightning damage. Almost 4 inches of rain
fell in the Parker area. Hail up to ping-pong ball size
piled up to a foot deep and closed a road in Evergreen.
Hail as large as 1 3/4 inches in diameter was reported
8 miles northeast of Deckers. Wind gusts to 65 mph were
estimated in southeast Aurora.
In 1990...marble size hail piled up to 2 inches deep in the
foothills community of Kittredge...18 miles southwest of
Denver. As much as half an inch of rain fell in just 15
minutes and caused minor road and small stream flooding.
A thunderstorm dropped pea to marble size hail and brief
heavy rain near Ward Road and 64th Avenue in Arvada.
Minor street and small stream flooding was reported in
In 1995...a strong thunderstorm microburst with only a few
drops of rain produced a recorded wind gust to 85 mph at
the site of the former Stapleton International Airport.
The wind gust occurred at 8:30 PM MDT. The all-time
highest recorded temperature in September...97 degrees...
occurred. The same temperature also occurred on
September 5...1899...September 4...1960...and September 4...
1-5 In 1995...record breaking heat occurred on the first 5 days
of the month when the temperature climbed into the 90`s
on each day. Record high temperatures of 97 degrees on
both the 1st and 4th equaled the all-time record maximum
for the month. High temperature of 95 degrees on the 3rd
was a record for the date. High temperatures of 94 degrees
on both the 2nd and the 5th were not records. The low
temperature of 64 degrees on the 4th equaled the record
high minimum for the date.
1-7 In 1978...the temperature reached 90 degrees or more on seven
consecutive days with the highest temperature...94 degrees...
recorded on both the 4th and 6th.
2 In 1938...heavy cloudbursts in the foothills near the top of
Genesee Mountain caused flash flooding on Bear Creek at
Morrison. Nearly 8 inches of rain fell just north
of Morrison in 6 hours and drowned 6 people in a car
between Morrison and Kittredge. Damage was estimated at
nearly a half million dollars. Flash flooding also
occurred on South Boulder Creek in Eldorado Springs.
Rainfall totaled 4.42 inches in Eldorado Springs...and
rainfall was estimated to more than 6 inches in the
foothills west of the town. Many buildings and residences
were damaged in Eldorado Springs...and bridges were swept
away. The high waters forced residents from their homes
as far downstream as Erie. This was the flood of record
on South Boulder Creek.
In 1973...hail to 3/4 inch diameter was reported in Boulder.
In 1987...lightning struck two men who were standing under a
tree in downtown Denver. Both were seriously injured and
In 1996...lightning sparked a brush fire in the south buffer
zone of the Rocky Flats Environmental Test Facility. No
structures were damaged...but the fire burned about 100
acres of grassland before being contained.
2-3 In 1892...there was a trace of rainfall each day. This...
together with a trace of rain on both the 7th and 8th...was
the only rainfall of the month...making the month the driest
on record. The monthly record was equaled in 1944.
3 In 1901...a thunderstorm produced rain...hail of unknown size...
and south winds sustained to 40 mph with gusts to 43 mph.
In 1961...Labor Day snow storm is the earliest date of the
first snow...trace and measurable...of the season. The heavy
wet snow broke many limbs from trees that were still in full
foliage. The storm produced 4.2 inches of snowfall at
Stapleton Airport with nearly a foot of snow in western
suburbs and in the foothills. Minimum temperature of 33
degrees was a record for the date and the coldest ever
recorded so early in the season.
In 1999...severe thunderstorms dumped large hail across metro
Denver. Hail as large as 1 inch in diameter was measured
near Cherry Creek in Aurora and near Bennett. Hail to 3/4
inch in diameter fell in the City of Denver.
In 2002...a thunderstorm produced a wind gust to 51 mph at
Denver International Airport.
In 2003...very heavy thunderstorm rain washed out parts of
the Virginia Canyon Road above Idaho Springs. Up to
4 feet of mud reportedly washed down the road during the
storm. Several vehicles were trapped on the road. In
Idaho Springs...several streets...including the main street...
were also buried in mud and gravel. Some buildings in
town experienced minor flooding...including the basement
of the town library and the police station.
3-6 In 1909...rainfall for the 4 days accumulated to 3.97 inches
in Boulder...while in Denver rainfall totaled 2.45 inches
on the 4th...5th...and 6th.