167  
NOUS45 KBOU 250045  
PNSBOU  
COZ030>051-252300-  
 
PUBLIC INFORMATION STATEMENT  
NATIONAL WEATHER SERVICE DENVER/BOULDER CO  
645 PM MDT SAT JUN 24 2017  
   
..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 IN 1873...FOREST FIRES PRODUCED A GREAT DEAL OF SMOKE IN THE  
MOUNTAINS TO THE SOUTHWEST OF THE CITY.  
IN 1958...AN UNUSUALLY COLD DAY FOR SUMMER SET TWO TEMPERATURE  
RECORDS FOR THE DATE. UNDER CLOUDY SKIES WITH OCCASIONAL  
DRIZZLE...A RECORD LOW MAXIMUM TEMPERATURE OF 55 DEGREES WAS  
ESTABLISHED ALONG WITH A RECORD MINIMUM TEMPERATURE OF 42  
DEGREES.  
IN 1959...A WAITRESS...WORKING AT A KITCHEN SINK...WAS INJURED  
BY A BOLT OF LIGHTNING...WHICH STRUCK THE REAR OF A TAVERN  
IN DENVER. SHE WAS HOSPITALIZED.  
IN 1971...A TORNADO TOUCHED DOWN BRIEFLY AT A HIGH SCHOOL  
FOOTBALL FIELD IN BRIGHTON...BUT CAUSED NO DAMAGE.  
IN 1981...3/4 INCH HAIL PELTED WHEAT RIDGE AND HAIL TO 1 1/4  
INCHES FELL IN LOUISVILLE. A BRIEF FUNNEL CLOUD WAS  
SIGHTED BY NATIONAL WEATHER SERVICE PERSONNEL 4 MILES EAST  
OF STAPLETON INTERNATIONAL AIRPORT.  
IN 1982...A BOLT OF LIGHTNING STRUCK A CABIN IN THE FOOTHILLS  
WEST OF DENVER. THE RESULTING FIRE TOTALLY DESTROYED THE  
CABIN.  
IN 1987...GOLF BALL SIZE HAIL FELL NEAR BENNETT.  
IN 1988...A TORNADO TOUCHED DOWN 1 MILE SOUTH OF WATKINS AND  
WAS ON THE GROUND FOR 4 MINUTES. ANOTHER TORNADO WAS  
SPOTTED JUST SOUTHEAST OF BARR LAKE AND WAS ON THE GROUND  
FOR 5 MINUTES. NO DAMAGE WAS REPORTED FROM EITHER TORNADO.  
LIGHTNING STRUCK TWO ROCK CLIMBERS NEAR ELDORADO SPRINGS.  
A 25-YEAR-OLD MAN WAS KILLED...AND A 21-YEAR-OLD MAN  
SUFFERED EXTENSIVE INJURIES. THUNDERSTORM WINDS KNOCKED  
OVER TWO ELM TREES NEAR DOWNTOWN DENVER. ONE FELL ON A  
HOUSE DESTROYING MOST OF IT. A NEARBY BUILDING WAS  
UNROOFED...AND TWO CARS WERE DAMAGED. A TRUCK THAT HAD BEEN  
SEVERELY DAMAGED BY ONE OF THE DENVER TORNADOES 10 DAYS  
BEFORE WAS HIT AGAIN. THUNDERSTORM WIND GUSTS TO 51 MPH  
WERE RECORDED AT STAPLETON INTERNATIONAL AIRPORT.  
IN 1991...THE TEMPERATURE REACHED A HIGH OF 100 DEGREES...  
SETTING A NEW RECORD FOR THE DATE.  
IN 1997...ONE INCH DIAMETER HAIL FELL IN ARVADA AND 1 1/2  
INCH HAIL IN BOULDER. HAIL AS LARGE AS 3/4 INCHES FELL  
IN DENVER...LOUISVILLE...WESTMINSTER...AND NEAR BROOMFIELD.  
IN 1999...THUNDERSTORM WINDS GUSTED TO 58 MPH NEAR FORT  
LUPTON TOPPLING AN OIL RIG. A 37-YEAR-OLD MAN WAS KILLED  
WHEN HE FELL 55 FEET FROM THE DERRICK OF THE RIG.  
IN 2001...FOUR GOLFERS AND ONE CONSTRUCTION WORKER RECEIVED  
MINOR INJURIES FROM A NEARBY LIGHTNING STRIKE ON THE  
BROADLANDS GOLF COURSE IN BROOMFIELD.  
IN 2002...HAIL TO 1 INCH IN DIAMETER WAS MEASURED IN GREENWOOD  
VILLAGE.  
IN 2005...HAIL TO 3/4 INCH IN DIAMETER FELL NEAR BENNETT AND  
ROGGEN. A THUNDERSTORM WIND GUST TO 61 MPH WAS RECORDED  
NEAR GOLDEN.  
IN 2009...LIGHTNING STRUCK THE DARLINGTON PRISMATIC ELECTRIC  
FOUNTAIN IN CITY PARK'S LAKE. THE DAMAGE WAS ESTIMATED TO  
BE APPROXIMATELY $25000.  
IN 2010...WIND GUSTS ASSOCIATED WITH A DRY MICROBURST DOWNED  
SEVERAL TREES IN THE VICINITY OF 14TH AND FEDERAL...AND  
NEAR BAYAUD ST. AND CLARKSON ST. IN DENVER. AT DENVER  
INTERNATIONAL AIRPORT...A PEAK WIND GUST TO 45 MPH WAS  
OBSERVED FROM THE SOUTHWEST.  
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  
THE 25TH.  
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  
DAMAGE.  
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  
DEGREES.  
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  
AURORA/CHERRY.  
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  
RAINFALL.  
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  
AIRPORT.  
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  
INTERNATIONAL AIRPORT.  
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  
STAPLETON AIRPORT.  
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  
HARVARD GULCH.  
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  
PARKER.  
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  
INTENSITY.  
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  
REPORTED.  
IN 1962...HEAVY RAIN AND SMALL HAIL CAUSED SOME FLOODING IN  
SOUTHWEST DENVER.  
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  
INTERNATIONAL AIRPORT.  
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  
JUNE 28TH.  
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  
52 MPH.  
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  
75 MINUTES.  
IN 1987...A WEAK TORNADO NEAR WATKINS STAYED ON THE GROUND FOR  
5 MINUTES.  
IN 1990...A SMALL TWISTER TOUCHED DOWN IN AN OPEN FIELD JUST  
NORTH OF THE ROCKY MOUNTAIN ARSENAL. NO DAMAGE WAS  
REPORTED.  
IN 1998...HAIL AS LARGE AS 1 INCH IN DIAMETER FELL NEAR  
EVERGREEN.  
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.  
 

 
 
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