Public Information Statement
Issued by NWS Denver/Boulder, CO
NOUS45 KBOU 260045
Public Information Statement
National Weather Service Denver/Boulder CO
645 PM MDT SAT JUN 25 2016
...This week in metro Denver weather history...
22-26 In 2012...the maximum temperature exceeded 100 degrees for
five consecutive days. Two of the high temperatures on
the 25th and 26th peaked at 105 degrees...which set the
all time record for the month of June and tied the all
time maximum temperature for Denver.
25-26 In 1969...high winds raked Boulder causing one fatality and
some injuries. One man was injured by a falling tree limb.
At the National Center for Atmospheric Research in Boulder...
sustained winds of 55 to 60 mph with wind gusts to 123 mph
were recorded. In downtown Boulder...winds averaged 30 to 40
mph with gusts to 70 mph. Widespread minor damage occurred...
especially in the Table Mesa area of south Boulder. Much
tree damage occurred in the older areas of Boulder where
several trees were uprooted. A mobile home was overturned
by the winds. At Stapleton Airport...west winds gusted to
43 mph on the 25th and 37 mph on the 26th.
In 1975...strong winds damaged utility lines...buildings...
vehicles...trees...and power lines in Boulder and other
communities to the north of Boulder. Microburst winds
gusted to 45 mph at Stapleton International Airport on
In 1983...heavy rain fell in the foothills west of Denver with
1.50 inches in 30 minutes at Intercanyon. Heavy rain
continued over metro Denver on the 26th with two-day
storm totals at many locations ranging from 1.00 to 2.50
inches. Rainfall totaled 1.37 inches at Stapleton
International Airport on the 26th.
In 1985...one to two inches of rain fell over metro Denver.
At Stapleton International Airport...rainfall totaled 0.93
inches...thunderstorm winds gusted to 44 mph...and 7/10 inch
hail was measured. The air mass was unusually cold for the
season...and snow fell in the foothills above 8 thousand
feet. The high temperature of only 63 degrees on the
26th equaled the record low maximum reading for the date.
26 In 1873...there was a great deal of smoke from a large forest
fire in the mountains to the southwest of the city and a
smaller fire directly to the west.
In 1874...fires at timberline to the west were visible from
the city. New and extensive fires were continually started
from south to northwest along the ridge line. Carelessness
of tourists was the apparent cause of the fires. Large and
valuable tracts of timber had already been destroyed.
In 1890...the only thunderstorm of the month produced a trace
of rain. A trace of rain also fell on 7 other days. This
was the only precipitation recorded during the month...
making it the driest June on record.
In 1893...northwest winds were sustained to 45 mph with gusts
to 48 mph.
In 1971...a microburst wind gust to 58 mph was recorded at
Stapleton International Airport. Dust devils were sighted.
In 1980...strong gusty thunderstorm winds damaged several
mobile homes in Thornton. Thunderstorm winds gusted
to 37 mph at Stapleton International Airport.
In 1986...hail piled up 1 1/2 inches deep in Golden Gate
Canyon and covered roadways an inch deep in Evergreen.
In 1988...a tornado touched down 2 miles north of Watkins.
It was on the ground for 15 minutes and did no reported
In 1989...two inch diameter hail fell at Kassler...1 inch hail
at Louviers...and 1 1/2 inch hail at Tiny Town.
In 1991...high winds...not associated with thunderstorms...
damaged a home in the Green Mountain area. The strong winds
picked up a heavy metal and glass table on the deck of a
house and threw it into the house. The table was destroyed
and the house received considerable damage.
In 1992...3/4 inch diameter hail fell in south Aurora and near
Buckley Air National Guard Base. Golf ball size hail was
reported in Parker.
In 1994...the all-time highest recorded temperature in June
and the second highest temperature ever recorded in Denver...
104 degrees occurred. This was the hottest day in Denver
since August 8...1878...when the temperature reached 105
In 2005...strong thunderstorm winds gusting to 58 mph damaged
a garage and some nearby trees near Fort Lupton. Winds
also gusted to 58 mph near Watkins. Thunderstorm winds
gusted to 60 mph near Roggen. Hail to 3/4 inch in diameter
was measured in southwest Aurora.
In 2009...severe thunderstorms moving through Denver and the
surrounding metro area produced intense thunderstorm winds.
At Denver International Airport...a wind gust blew a
luggage car into a Southwest Airlines airplane causing
some damage. Peak wind gusts included: 68 mph at
Denver International Airport...4 miles west of Rocky
Mountain Metropolitan Airport and 12.5 miles north of Lowry
AFB; 64 mph near Arvada and Parker; and 60 mph in
In 2014...a severe thunderstorm produced a peak wind gust to
58 mph approximately 9 miles northeast of Denver
International Airport. Offically...a peak wind gust to 54
mph was measured from the northeast with just a trace of
26-27 In 1965...wind gusts to 38 mph were recorded in downtown
Boulder...causing widespread minor damage. A microburst wind
gust to 41 mph was recorded at Stapleton International
27 In 1873...Pikes Peak was hidden from view by smoke from forest
fires in the mountains to the southwest of the city.
In 1927...the temperature cooled to a low of only 72 degrees...
the all-time record high minimum for the month.
In 1980...lightning injured 4 people on a baseball diamond in
Broomfield. The bolt seriously injured the pitcher while
also striking (out) the batter...catcher and second baseman.
In 1987...a microburst wind gust to 53 mph was recorded at
Stapleton International Airport.
In 1990...the temperature reached a high of 102 degrees...
setting a new record maximum for the date.
In 1993...thunderstorm winds gusted to 60 mph across parts of
metro Denver. A wind gust to 50 mph blew over a 30-foot
canvas tent at an amusement park southeast of Denver.
Fifteen people...mostly children...were injured. Microburst
wind gusts to 33 mph were recorded at Stapleton
In 2002...heavy rain...up to 3/4 inch...fell across sections of
the Hayman burn area near Cheeseman Reservoir. Several
forest service roads were washed out and many culverts were
plugged by debris.
In 2004...heavy rain producing thunderstorms caused rock and
mud slides across the Overland Fire burn area in Jamestown.
An estimated 50 tons of sand...dirt...rock...and ash slid into
town...filling a culvert under Main Street. The slide covered
150 to 225 feet of Main Street. The flood was produced by
half an inch of rain in 30 minutes. A deluge of very heavy
rainfall from nearly stationary thunderstorms caused flooding
and flash flooding problems over parts of Jefferson and
Douglas counties. An automated rain gage in Golden measured
3.60 inches of rainfall in one hour. Numerous homes were
flooded in Golden...including one that was 146 years old.
The home was listed as a complete loss. State Highway 93
had to be closed from the Pine Ridge subdivision to the
Golden Gate Canyon Road. At the height of the storm...about
4 feet of water covered State Highway 93 through Golden...
forcing its temporary closure. Several intersections were
also flooded and impassable. Rock and mud slides were
reported in Golden Gate Canyon State Park. At the Deer
Creek Golf Course at Colorado 470 and Kipling...the greens
were completely inundated by floodwaters. Some backyards
near the golf course were partially washed out. In Douglas
County...water up to a foot deep covered the roadways in
Roxborough State Park. The Waterton Canyon Road also had to
be closed due to high water.
In 2010...a severe thunderstorm produced hail up to 1 inch
in diameter near Strasburg. Hail up to 3/4 inch in diameter
was reported in Aurora and Buckley Air Field.
In 2014...a severe thunderstorm produced hail...up to 1 inch
in diameter...near Ft. Lupton.
28 In 1873...there was a great deal of smoke over the city from
forest fires in the mountains.
In 1875...smoke from forest fires in the foothills south of
Denver were visible from the city.
In 1913...an apparent dry microburst produced southwest winds
sustained to 44 mph with gusts to 48 mph in the city.
In 1925...a thunderstorm produced north winds sustained to
38 mph with gusts to 44 mph.
In 1958...a microburst caused a brief wind gust to 58 mph at
In 1964...lightning struck several homes in metro Denver...
sparking fires. Some flooding occurred in the Stockyards
area...at West 45th Avenue and St. Paul Street...and along
In 1997...strong microburst winds of unknown speed downed
several trees...signs...and at least one light pole in the
Fort Lupton area. Two trees knocked over by the storm
downed power lines causing scattered outages.
In 2002...a thunderstorm wind gust to 60 mph was recorded in
In 2005...severe thunderstorms produced wind gusts to 66 mph
near Longmont and to 60 mph near Niwot. No damage was
reported. A thunderstorm produced a wind gust to 55 mph
at Denver International Airport during the afternoon.
29 In 1874...eight different fires in mountain forests were
visible from the city. All of the fires were extensive...
and the volume of smoke from each was immense. Three of
these fires had been burning from the 18th with varied
In 1911...an apparent dry microburst produced sustained winds
to 45 mph.
In 1960...a strong gust of wind blew a small foreign sedan off
the highway near Brighton...injuring the driver. East winds
gusted to 40 mph at Stapleton Airport.
In 1961...thunderstorm winds estimated as high as 40 to 50 mph
occurred over southeast Denver. No significant damage was
In 1962...heavy rain and small hail caused some flooding in
In 1995...upslope cloudiness with rain and fog cooled
temperatures to record levels. Low temperature of 47
degrees equaled the record for the date. High temperature
of only 54 degrees set a new record low maximum for the
date. Rainfall totaled 0.90 inch at Denver International
Airport and 0.41 inch at the site of the former Stapleton
In 2003...a severe thunderstorm in Parker produced hail to
1 inch in diameter.
In 2011...two airmen from the Colorado National Guard
suffered minor injuries when they were struck by lightning.
They were hit while on duty at a flight line at Buckley
Air Force Base. At Denver International Airport...a
microburst produced a peak wind gust to 72 mph.
29-2 In 1990...almost a year to date after the record breaking heat
in early July 1989...the third longest heat wave in Denver
history started. From June 29th through July 2nd the
temperature reached 100 degrees or more on four consecutive
days. The highest reading of 102 degrees occurred on the
29th...30th...and 1st. Combined with the 102 degree reading
on June 27th this would have been the longest heat wave on
record...but the temperature climbed to only 98 degrees on
29-15 In 2000...the 29th marked the beginning of a near record hot
streak for metro Denver. The high temperatures...as recorded
at Denver International Airport...exceeded the 90 degree mark
for 17 consecutive days from June 29th through July 15th.
The record of 24 consecutive 90 degree or above days was
set from July 13th through August 5th...2008.
30 In 1879...dense smoke from mountain forest fires covered the
city and obscured the sun as it set behind the mountains.
In 1900...a thunderstorm produced northwest winds to 44 mph
with gusts to 58 mph...but only a trace of rain.
In 1917...north winds were sustained to 47 mph with gusts to
In 1942...a strong thunderstorm produced hail and heavy rainfall
in south Denver. Leaves were stripped from trees and heavy
rain caused street flooding which halted traffic. Hail of
unknown size reached a depth of 9 inches on the ground.
In 1965...funnel clouds were observed to the south of Stapleton
International Airport and in Jefferson County...15 miles
southwest of the airport. Later...a tornado touched down
briefly 1 mile east of Littleton...causing only minor damage.
Another tornado was observed 12 miles southwest of Stapleton
International Airport in Jefferson County. Hail to 3/4 inch
in diameter fell in the Bear Valley area...12 miles south-
southwest of Stapleton International Airport. Yet another
tornado was sighted 10 miles northwest of the airport.
Cloudbursts accompanied by hail battered areas of Arapahoe
and Adams counties east of Denver...damaging ripening grain
fields. At Lafayette...3.50 inches of rain fell in 30
minutes...causing some flooding.
In 1982...numerous funnel clouds were observed over southwest
metro Denver. Only one funnel touched down near the
intersection of Jewell and Kipling. The tornado was on the
ground for about 5 minutes and caused no damage except for
uprooting some trees. In addition...thunderstorms produced
heavy rain and hail in the foothills west of Denver. Over
an inch of rain fell in a short time near Idaho Springs...
causing Clear Creek to overflow its banks and flood a few
low lying areas of the town. A few people were evacuated...
and water and mud entered several stores. The heavy rain
also washed out several roads. Hail piled up to a depth of
3 to 4 inches near Idaho Springs. Hail to 3/4 inch was
reported at many places across metro Denver including
Stapleton International Airport. Lightning struck a
chemistry building on the University of Colorado campus in
Boulder and started a small fire. Thunderstorm wind gusts
to 60 mph were reported near Brighton.
In 1984...heavy rain caused some street and basement flooding
in Littleton. One location received 1.56 inches of rain in
In 1987...a weak tornado near Watkins stayed on the ground for
In 1990...a small twister touched down in an open field just
north of the Rocky Mountain Arsenal. No damage was
In 1998...hail as large as 1 inch in diameter fell near
In 2005...a severe thunderstorm produced hail as large as
3/4 inch near Roggen. The hail destroyed a wheat field.
In 2006...the temperature reached a high of 98 degrees at
Denver International Airport. This marked the 19th day
in June with a maximum temperature of 90 degrees or more
setting a new all-time record for the month.
In 2011...very strong thunderstorm winds were also observed
across portions of the Urban Corridor. A peak wind gust to
65 mph was recorded...2 miles northeast of Boulder with a
gust to 63 mph at Front Range Airport at Watkins and
7 miles southeast of Denver International Airport. The
peak wind gust measured at Denver International Airport
itself was 45 mph. A severe thunderstorm also produced
one inch in diameter hail 2 miles south-southeast of
Parker. In addition...a lightning strike destroyed a home
in north Denver.
30-1 In 1873...heavy rainfall overnight totaled 1.42 inches.
Mountain peaks to the southwest of the city were covered
with fresh snow on the morning of the 1st.
1 In 1915...northeast winds sustained to 41 mph with gusts to
50 mph occurred just before a thundershower in the evening.
Rainfall was only 0.07 inch.
In 1941...unusually heavy thunderstorm rains flooded
basements and blocked traffic. Water was curb high
on many downtown streets. The thunderstorm also pelted
the city with hail of unknown size. Rainfall in
downtown Denver totaled 0.72 inch...but greater amounts
likely occurred in other parts of the city.
In 1960...a severe dust devil moving through an Adams County
suburban area blew over a fireworks stand...injuring an 11-
year-old boy customer and two women operators of the stand.
The boy was found under the demolished stand 100 feet away.
In 1961...hail as large as 1 1/4 inches in diameter was
reported over east Denver.
In 1967...golf ball size hail fell over portions of metro
Denver. Hail stones to 2 inches in diameter damaged roofs
and broke windows in northeast Boulder. Marble to golf ball
size hail fell at the Boulder Airport. A funnel cloud was
sighted over the foothills near Boulder. Hail stones of 1
to 2 inches in diameter were measured at Jefferson County
Airport near Broomfield. Marble size hail fell in the
vicinity of Arvada and Westminster.
In 1982...severe thunderstorms dropped large hail in Denver...
Boulder...Commerce City...Lakewood...Wheat Ridge...Golden...and
Arvada. Most locations reported hail size from 3/4 to 1 1/4
inches in diameter.
In 1990...the high temperature reached 102 degrees at
Stapleton International Airport.
In 1998...hail to 1 1/2 inches in diameter fell near Bennett.
In 2001...the temperature climbed to a high of 101 degrees at
Denver International Airport.
1-18 In 1874...a streak of 18 consecutive days of 90 degrees
tied for second with another streak that was later set
in the summer of 1901. The record of 24 consecutive days
was established in the summer of 2008.
1-31 In 2012...it was the hottest July on record in Denver since
weather records began in 1872. The average temperature for
the month was 78.9 degrees which was 4.7 degrees above
normal. There were 27 days in which the high temperature
equaled or exceeded 90 degrees...which established a new
record. There were also 7 days in which the temperature
equaled or exceeded 100 degrees which tied the record
set in 2005.
2 In 1879...a severe hail storm produced considerable damage
in the vicinity of Arvada. Some of the stones were
unusually large...measuring 6.5 inches in circumference
(2 inches in diameter) with an average weight of 1 ounce.
The stones were uniformly large with one side concave.
The greatest damage was to early wheat...cabbage...and vines.
A tree just to the south of the weather station in downtown
Denver was struck by lightning. Residents in the house
15 feet away were affected by the strike.
In 1885...thunderstorm winds were sustained to 50 mph in the
In 1892...an apparent cold front produced sustained northeast
winds to 40 mph with gusts to 45 mph.
In 1955...a apparent microburst wind gust to 69 mph was
recorded at Stapleton Airport where the brief strong wind
reduced the visibility to zero in blowing dust.
In 1965...hail...up to 2 inches in diameter...struck southwest
Adams and northeast Denver counties...damaging cars...windows...
and foliage. Hail accumulated up to a foot deep. Wind
gusts to 48 mph and hail to 1 inch in diameter fell at
Stapleton International Airport where the large hail broke
three storm windows and shredded shrubs at the U.S. Weather
Bureau upper air building.
In 1968...a pilot reported a tornado 10 miles southeast of
In 1971...one inch diameter hail stones were reported in Adams
County about 30 miles east of Denver.
In 1987...a large tornado touched down 10 miles northeast of
Stapleton International Airport. The tornado was vertical
and thick and kicked up a large dust and debris cloud.
Later...it developed a sinuous rope-like shape as it slowly
dissipated. The tornado was visible for 15 minutes. The
twister occurred in open country and did only minor damage
to a metal shed...porch...and mailbox. A man was killed by
lightning in southwest Aurora. He was in his backyard and
had a shovel in his hand at the time of the strike. A group
of soccer players were hit by lightning on a field in
Boulder. A 10-year-old boy was critically injured and
hospitalized; fortunately he recovered. Six other people
were knocked to the ground by the strike. Two of these were
slightly injured. Golf ball size hail fell just east of
Littleton and at Highlands Ranch. Hail as large as 3/4 inch
in diameter was reported in Aurora and Parker and near Hudson
In 1988...a 45-year-old man was injured by lightning at Cherry
Creek Reservoir. Administration of CPR probably saved his
In 1990...the temperature reached a high of 100 degrees at
Stapleton International Airport.
In 1993...thunderstorm winds blew a roof off a barn near
Parker...causing an estimated 15 hundred dollars damage.
In 1994...thunderstorm winds downed power lines in Boulder...
causing power outages. Winds gusted to 66 mph in Boulder...
64 mph in Arvada...and 60 mph in Golden.
In 1998...a small tornado touched down briefly near Barr Lake...
but caused no damage.
In 2002...hail as large as 1 3/4 inches in diameter fell in
the City of Denver and in Arapahoe County near Littleton.
The low temperature of 69 degrees equaled the record high
minimum for the date.
In 2006...lightning struck a teenager in Castle Rock as he
was mowing his lawn and listening to an iPod. The teen
suffered burns to his hands and feet...and had blood
running from his ears when he was found. The victim`s
eardrums were ruptured...which damaged his hearing.
Lightning also struck a house in Castle Rock causing
extensive damage to the roof and side of the home.
Heavy rains caused flash flooding at Castlewood Canyon
State Park near Franktown. The floodwaters destroyed
four footbridges along the high trail. A culvert and
several roads were washed out in the area. In addition...
two driveways crossing Cherry Creek were washed out near
Prairie Canyon Ranch. Heavy rainfall also caused minor
flooding on Murphy and Sand Creeks...just east of Buckley
AFB. Gun Club Road was closed between Alameda and
Mississippi Avenues...north of the Murphy Creek Golf
Course...where 3 feet of standing water reportedly covered
the road. A severe thunderstorm produced large hail to
7/8 inch in diameter in south Aurora near Cherry Creek.