Public Information Statement
Issued by NWS Denver/Boulder, CO
NOUS45 KBOU 070045
Public Information Statement
National Weather Service Denver/Boulder CO
645 PM MDT SAT AUG 6 2016
...This week in metro Denver weather history...
7 In 1948...a brief west moving tornado was sighted 3 miles
north-northeast of Stapleton Airport. The white funnel
silhouetted against a gray cloud background was very
narrow...nearly vertical...and estimated at nearly 5 thousand
feet high. A dust cloud formed on the ground around the
funnel. No damage was reported.
In 1952...a thunderstorm wind gust to 52 mph was recorded at
In 2014...severe thunderstorms produced large hail across
western and southern parts of metro Denver. Near Centenniel
and Golden...hail up to quarter size was reported. Near
Bennett...a peak thunderstorm wind gust to 65 mph was also
reported. At Denver International Airport...a peak wind
gust to 46 mph was recorded.
8 In 1874...swarms of grasshoppers invaded the city. Millions
of them were seen cruising through the air. The insects
were apparently picked up by a thunderstorm gust front
and carried into the city. The grasshoppers had ravaged
crops in surrounding counties for the last month.
In 1878...the highest temperature ever recorded in Denver...105
degrees...occurred at 3:20 PM. This temperature was equaled
on July 20th in 2005.
In 1969...the temperature reached 100 degrees at Stapleton
In 1976...in Thornton...a 13 year old boy riding a bicycle was
struck and killed by lightning.
In 2000...lightning struck three homes in central Arapahoe
County east of Denver. Damage was estimated at 47 thousand
In 2003...hail to 1 inch in diameter pelted Denver. Hail to
7/8 inch was measured in Boulder.
In 2008...heavy rain also caused flash flooding over south
Denver and its nearby suburbs. Heavy rain...from 2.5 to 4
inches...fell in less than 90 minutes. Firefighters rescued
20 people as the water quickly rose along creeks...flooded
roadways...and stranded motorists. Three people had to be
rescued along Cherry Creek when the bike path flooded. In
Evergreen...a man suffered minor injuries when he was struck
by lightning. It entered his finger...traveled down his body...
and exited his foot.
In 2013...heavy rain caused localized flash flooding in Aurora.
An undergound parking garage at an apartment complex was
inundated with 3 to 4 feet of water. Flash flooding forced
a road closure at East Mississippi Ave. and Alton St. Also...
several people had to be rescued when three vehicles stalled
in floodwaters at Alameda Ave. and Havana St. The stationary
thunderstorms dumped 2.75 inches of rain in less than 45
minutes. In addition...large hail...up to one inch in diameter...
was reported north of Roxbourough State Park. At Denver
International Airport...just a trace of rainfall was observed.
8-10 In 1979...heavy thunderstorm rains on each of three
consecutive days dumped a total of 2.22 inches of rain
at Stapleton International Airport. The heaviest rain...
0.95 inches...fell on the 9th. Small hail to 1/8 inch
diameter fell on the 8th.
8-13 In 1875...clouds of grasshoppers were seen flying through
the air on the prevailing winds during each day.
9 In 1900...a thunderstorm produced west winds sustained to
47 mph with gusts to 55 mph...but only 0.01 inch of rain.
In 1902...a thunderstorm produced no rain and north winds
sustained to 52 mph with gusts to 60 mph.
In 1934...heavy cloudbursts in the foothills near Kittredge
and at the head of Mount Vernon Creek caused flash flooding
on both Bear Creek and Mount Vernon Creek at Morrison...
which resulted in 6 deaths and much property damage.
The highway in Mount Vernon Canyon was destroyed by the
In 1981...3/4 inch hail fell at Kittredge near Evergreen in
In 1987...3/4 inch hail fell in Boulder and 9 miles northwest
of Castle Rock.
In 1995...lightning struck a 16-year-old counselor in the
back of the head while he and a friend were standing under
a tree at the Singing River Ranch...7 miles west of
Evergreen. He stopped breathing...but his friend was able
to summon help and they were able to revive him. He was
hospitalized for a few days and released.
In 1998...brief...weak tornadoes (F0) were sighted near
Bennett and Roggen. No damage was reported. Hail as
large as 1 inch diameter fell in Franktown with
3/4 inch diameter hail measured near Castle Rock.
Thunderstorm winds gusted to 61 mph near Roggen.
9-10 In 2006...mid and high cloudiness overnight on both days
resulted in two temperature records. The low temperature
of 71 degrees on the 9th was a record high minimum for
the date. The low temperature of 68 degrees on the 10th
equaled the record high minimum for the date first set
10 In 1924...0.01 inch of rain fell over downtown Denver. This
along with the 0.01 inch of rainfall on the 4th was the
only rainfall of the month...making this the driest August
on record in the city.
In 1962...the high temperature reached 100 degrees at
In 1970...hail stones to 1 inch in diameter were reported in
the Fort Lupton area.
In 1972...dry thunderstorm microburst winds gusting to 46 mph
briefly reduced the surface visibility to 3/4 mile in
blowing dust at Stapleton International Airport.
In 1978...lightning struck two men in Aurora...killing one and
injuring the other.
In 1982...a tornado was sighted near Castle Rock and remained
on the ground for 10 minutes. Wind gusts to 60 mph were
reported in Castle Rock. No damage was reported.
In 1994...heavy thunderstorm rains caused flash flooding on
Lena Gulch in west metro Denver. Damage was estimated at
50 thousand dollars. Lightning struck a house in
Westminster...causing a small attic fire.
In 1996...strong thunderstorm winds toppled a tent at a
company picnic in Westminster. Five people received minor
injuries when the tent collapsed. Two cars nearby were
also damaged by flying debris. A weak tornado (F0)...first
sighted near Denver International Airport...traveled east
to near Bennett and Strasburg. No significant damage was
In 1998...heavy rain caused flooding and flash flooding
problems over southwest metro Denver. An observer in
Lakewood measured 3.26 inches of rainfall in an hour.
Several streets were flooded in central Lakewood. In
addition...a trailer park along Lena Gulch in Wheat Ridge
was evacuated due to high waters. One inch diameter
hail fell near Roggen.
In 1999...thunderstorm-producing tornadoes...damaging straight
line winds...heavy rain...and hail hammered metro Denver. In
the city...small hail and heavy rainfall...up to 2.50 inches
an hour...caused a 20-foot by 50-foot section of the roof to
collapse at a furniture warehouse. Damage to the warehouse
was estimated at 1 million dollars. Heavy rain also flooded
several underpasses with up to 3 feet of water...which
resulted in a number of stalled vehicles. In Fort Lupton...a
tornado bounced across the area. Spotty damage was reported
along a 5-mile path as trees...power poles...and lines were
downed. In addition...an empty semi-trailer was overturned
onto another vehicle northeast of the town. Thunderstorm
winds gusted to 81 mph south of Fort Lupton.
In 2004...severe thunderstorms pummeled metro Denver with
large hail. Hail up to 3 inches in diameter was measured
10 miles east of Castle Rock. Two inch diameter hail fell
in Louisville...10 miles north of Hudson...and 1 mile east of
Brighton. Hail to 1.75 inches was reported in Englewood...
1 mile south of Ft. Lupton...and 8 miles east of Boulder.
Hail to 1.50 inches was reported around Boulder...near
Broomfield...and in Lafayette...Thornton and Greenwood Village.
Hail from 3/4 to 1 inch in diameter was found in Broomfield...
Brighton...Castle Rock...Denver and Thornton...and near Longmont...
Northglenn...Greenwood Village...Morrison...and Wheat Ridge.
Severe thunderstorm wind gusts were recorded to 66 mph in
Parker and to 60 mph 5 miles northeast of Boulder. There
were no damage estimates from the hail or wind.
11 In 1872...fog was very dense until about 8:00 AM. There was
water dripping from the roofs of houses as if it had rained.
The rain gage showed 0.01 inch of moisture...even though
there had been no rainfall.
In 1927...an apparent dry microburst produced only a trace
of rain and brief northwest winds sustained to 34 mph
with gusts to 44 mph.
In 1980...hail up to golf ball size caused some roof and car
damage in the southern part of Aurora.
In 1990...lightning ignited a storage tank filled with 10
thousand gallons of crude oil in a farmer`s field near
Dacono...25 miles north of Denver. Flames shot to 40 feet
high for nearly 2 hours before being extinguished. A
lightning bolt also struck 21 miles north of Denver at an
Erie fire station...causing extensive damage to the gas meter
and electrical system. The sudden power surge blew out the
station`s television set...a refrigerator...and a pop
machine. Small fires spread throughout the structure...
totally destroying the building`s electrical wiring. The
fires were quickly extinguished by the in-resident fire
fighters. Golf ball size hail was reported in Denver near
the intersection of Santa Fe Drive and I-25.
In 2012...a severe thunderstorm produced a wind gust to 60
mph at Rocky Mountain Metropolitan Airport.
In 1992...dime size hail fell in Westminster.
In 1994...strong thunderstorms produced large hail across
northwest and north metro Denver. One inch diameter hail
fell in Brighton with 3/4 inch hail reported in Westminster
and at Indian Hills in the foothills west of Denver.
Lightning struck a house in Arvada. The resulting
fire destroyed one-third of the house. Funnel clouds were
sighted over Westminster.
In 1997...large hail...strong winds...and torrential rains
hammered portions of Lakewood and south Denver. Nearly
1 inch of rain fell in the span of 10 minutes in south
Denver with a storm total of 1.81 inches. Street flooding
was extensive as gutters and other drainage systems in the
area were clogged by hail...piled several inches deep...and
other debris. Strong thunderstorm winds to 50 mph and
large hail accompanied by heavy rain caused extensive
damage to cars...homes...and businesses. Several trees were
downed by the strong winds...and trees were stripped of
their leaves by hail. A water lily exhibition on display
at the Denver Botanic Gardens was heavily damaged. Final
estimates of the damage included 60 million dollars to
automobiles and an additional 68 million dollars to homes
and businesses. Hail to 1 1/2 inches in diameter fell in
south Denver with 3/4 to 1 inch hail in Lakewood. A man
received minor injuries in Aurora when he was struck by
lightning while talking on the telephone.
In 2003...hail to 3/4 inch in diameter was measured in Aurora
near Cherry Creek.
12 In 1876...the temperature climbed to a high of 100 degrees
in downtown Denver.
In 1941...excessive thunderstorm rainfall flooded streets
and delayed traffic for a few hours in some sections of
the city. The basements of a considerable number of homes
and commercial buildings were flooded. The total value of
the damage was unknown. Only 0.94 inch of thunderstorm
rainfall was recorded downtown.
In 1969...a man and a 9-year old boy were injured...when
lightning struck a tree near where they were standing.
Both were revived after treatment...but the boy later died
of respiratory failure due to electrical shock.
In 1984...heavy thunderstorm rains drenched southern metro
Denver. Rural roads in Douglas County received minor
washouts. Hail...as large as 3/4 inch in diameter...was
reported in southeast Aurora with one inch diameter hail
reported near Parker. Rainfall totaled 1.00 inch at
Stapleton International Airport.
12-13 In 1975...heavy rains caused flash flooding along the
foothills from Denver north. Thunderstorm rainfall
totaled 1.56 inches at Stapleton International Airport.
In 2004...a brief cool spell resulted in two daily
temperature records. The low temperature of 49
degrees was a record minimum for the 12th...as was
the low temperature of 48 degrees on the 13th.
13 In 1959...thunderstorm winds gusted to 53 mph at Stapleton
In 1983...thunderstorms dumped torrential rain in Northglenn...
Thornton...and Broomfield. Northglenn was drenched with
1.72 inches in 30 minutes. Street flooding was widespread.
Hail...as large as 3/4 inch in diameter...was reported
7 miles northeast of Boulder along with heavy rain which
caused some street flooding.
In 2000...lightning sparked 3 small grass fires near Golden.
The fires were quickly contained. Hail as large as 3/4
inch in diameter fell in Castle Rock.