889  
NOUS45 KBOU 210859  
PNSBOU  
COZ030>051-212300-  
 
PUBLIC INFORMATION STATEMENT  
NATIONAL WEATHER SERVICE DENVER/BOULDER CO  
259 AM MDT MON JUL 21 2025  
   
..TODAY IN METRO DENVER WEATHER HISTORY
 
 
7-25 IN 1934...A STREAK OF 15 CONSECUTIVE DAYS OF 90 DEGREES...FROM THE  
7TH TO THE 25TH...RANKED 5TH ON THE LIST OF HOT STREAKS. THE  
RECORD OF 24 CONSECUTIVE DAYS WAS ESTABLISHED IN THE SUMMER OF  
2008.  
13-5 IN 2008...A STREAK OF 24 CONSECUTIVE DAYS OF 90 DEGREES...FROM  
JULY 13TH TO AUGUST 5TH...SHATTERED THE PREVIOUS RECORD OF 18  
CONSECUTIVE DAYS ESTABLISHED IN 1901 AND 1874. IRONICALLY...  
NO NEW SINGLE DAY RECORD HIGH TEMPERATURES WERE SET IN THE  
MONTH OF JULY. IN AUGUST HOWEVER...A RECORD OF 104 DEGREES  
WAS SET ON THE 1ST...AND ANOTHER RECORD OF 103 DEGREES WAS  
SET ON THE 2ND. IN ADDITION...A RECORD LOW MIN OF 70 DEGREES  
WAS SET ON AUGUST 2ND.  
18-2 IN 1987...FROM JULY 18TH TO AUGUST 2ND...A STREAK OF 16  
CONSECUTIVE DAYS OF 90 DEGREES RANKED 4TH ON THE LIST OF HOT  
STREAKS. THE RECORD OF 24 CONSECUTIVE DAYS WAS ESTABLISHED  
IN THE SUMMER OF 2008.  
19-23 IN 2005...THE HIGH TEMPERATURE CLIMBED ABOVE 100 DEGREES ON  
EACH OF THE 5 DAYS WITH READINGS OF 101 ON THE 19TH...105 ON  
THE 20TH...104 ON THE 21ST...AND 102 ON BOTH THE 22ND AND 23RD.  
A NEW RECORD MAXIMUM TEMPERATURE FOR THE MONTH OF JULY OF 105  
DEGREES WAS SET ON THE 20TH...WHICH ALSO EQUALED THE ALL TIME  
RECORD MAXIMUM FOR DENVER OF 105 DEGREES FIRST SET ON AUGUST  
8TH IN 1878. DAILY MAXIMUM TEMPERATURE RECORDS WERE SET ON  
EACH DAY...AND THE 5 DAY PERIOD EQUALED THE RECORD FOR THE  
MOST CONSECUTIVE DAYS OF 100 DEGREES OR MORE FIRST SET FROM  
JULY 4TH THROUGH 8TH IN 1989. THE INTENSE HEAT RESULTED IN  
A HIGH USE OF ELECTRICITY FOR COOLING PURPOSES. THE DEMAND  
FOR ELECTRIC POWER EXCEEDED THE SUPPLY AND ROLLING BLACK-OUTS...  
EACH LASTING ABOUT AN HOUR...WERE SCHEDULED ACROSS METRO DENVER  
DURING THE AFTERNOONS AND EARLY EVENINGS.  
20-23 IN 1961...FROM THE 20TH TO THE 23RD...UNUSUALLY COOL WEATHER FOR  
JULY RESULTED IN SEVERAL TEMPERATURE RECORDS. RECORD  
MINIMUM TEMPERATURES WERE SET OR EQUALED ON EACH DAY WITH  
READINGS OF 51...51...49 AND 49 DEGREES. HIGH TEMPERATURE OF  
ONLY 64 DEGREES ON THE 21ST WAS A RECORD LOW MAXIMUM FOR THE  
DATE.  
20-25 IN 1965...FROM THE 20TH TO THE 25TH...HEAVY SHOWERS AND  
THUNDERSTORMS DOUSED METRO DENVER WITH SIGNIFICANT RAIN EACH  
DAY. RAINFALL FOR THE SIX DAYS TOTALED 5.16 INCHES AT  
STAPLETON INTERNATIONAL AIRPORT. MASSIVE RAINFALL OCCURRED  
ON THE 20TH...21ST...AND 25TH...FLOODING STREETS AND BASEMENTS  
AND CAUSING STREAMS TO OVERFLOW. THE HEAVIEST RAINFALL...  
2.05 INCHES...AT STAPLETON INTERNATIONAL AIRPORT OCCURRED ON  
THE 25TH.  
21 IN 1879...LIGHTNING STRUCK A HOUSE IN NORTH DENVER. THE BOLT  
STRUCK THE CENTER OF THE ROOF DRIVING PART OF IT INTO THE  
HOUSE AND SCATTERED SHINGLES ALL OVER THE YARD. FURNITURE  
IN THE HOUSE WAS HEAVILY DAMAGED...BUT NONE OF THE THE NINE  
RESIDENTS WERE INJURED OTHER THAN BEING STUNNED. THE NOISE  
SOUNDED AS IF A CANNON HAD BEEN EXPLODED. RAINFALL WAS ONLY  
0.02 INCH DOWNTOWN.  
IN 1921...NORTHWEST WINDS WERE SUSTAINED TO 42 MPH WITH GUSTS  
TO 48 MPH.  
IN 1943...A SEVERE THUNDERSTORM DURING THE EVENING CAUSED THE  
DEATH OF A MAN WHOSE TRUCK SKIDDED ON A MUDDY ROADWAY ON  
A STEEP HILL AND OVERTURNED PINNING HIM UNDERNEATH. SEVERAL  
SMALL FIRES WERE STARTED BY THE LIGHTNING...AND ELECTRICAL  
WIRES WERE DOWNED. NO SERIOUS PROPERTY DAMAGE WAS REPORTED...  
BUT FIREMEN ANSWERED 19 ALARMS IN 2 HOURS. ONE PERSON WAS  
INJURED BY LIGHTNING.  
IN 1965...A FUNNEL CLOUD WAS SIGHTED IN THE NORTHERN PORTION OF  
DENVER. LATER...4 OR 5 FUNNEL CLOUDS WERE SIGHTED ABOUT 15  
MILES NORTH OF STAPLETON INTERNATIONAL AIRPORT. HEAVY RAIN  
ACCOMPANIED BY HAIL WASHED AWAY PART OF A CITY STREET AND  
CAUSED OTHER FLOODING IN CENTRAL CITY. THERE WERE HEAVY  
SHOWERS AND SOME DAMAGE FROM LIGHTNING IN BOTH DENVER AND  
BOULDER. MARBLE TO GOLF BALL SIZE HAIL FELL 10 MILES  
NORTHWEST OF STAPLETON AIRPORT.  
IN 1966...HEAVY THUNDERSTORM RAINS FLOODED STREETS AND  
BASEMENTS ACROSS METRO DENVER.  
IN 1973...A TORNADO TOUCHED DOWN BRIEFLY 2 MILES NORTHEAST  
OF PARKER...CAUSING MINOR DAMAGE. FUNNEL CLOUDS WERE ALSO  
SIGHTED 3 MILES NORTHEAST OF SEDALIA...11 MILES SOUTH  
SOUTHEAST OF STAPLETON INTERNATIONAL AIRPORT...AND NEAR  
PARKER. HAIL TO 3/4 INCH IN DIAMETER FELL OVER THE WESTERN  
SUBURBS OF DENVER.  
IN 1974...HEAVY THUNDERSTORM RAINS CAUSED FLASH FLOODING IN  
METRO DENVER. RAINFALL TOTALED 1.26 INCHES AT STAPLETON  
INTERNATIONAL AIRPORT.  
IN 1976...HEAVY THUNDERSTORM RAINS OCCURRED ACROSS SOUTH METRO  
DENVER WITH 1.75 INCHES OF RAIN RECORDED IN 40 MINUTES  
IN SOUTHEAST AURORA AND 2.00 INCHES IN 20 MINUTES AT CHERRY  
CREEK RESERVOIR. A FUNNEL CLOUD WAS SIGHTED BY THE PUBLIC  
EAST OF ARAPAHOE COUNTY AIRPORT...NOW CENTENNIAL AIRPORT.  
IN 1981...THE TEMPERATURE REACHED 100 DEGREES...SETTING A NEW  
RECORD HIGH FOR THE DATE.  
IN 1983...DOWNPOURS DRENCHED THE FRONT RANGE WHERE AMOUNTS OF  
1 TO 2 INCHES WERE COMMON. THE HEAVIEST REPORTED RAINFALL  
WAS 2.36 INCHES IN A 6-HOUR PERIOD AT PARKER WHERE HAIL TO  
3/4 INCH AND WIND GUSTS AS HIGH AS 75 MPH OCCURRED. UP TO  
GOLF BALL SIZE HAIL FELL IN THE PARKER AND CASTLE ROCK AREAS;  
WIND GUSTS TO 75 MPH WERE RECORDED IN CASTLE ROCK.  
IN 1993...THUNDERSTORM WINDS TOPPLED A 3 STORY HIGH RUSSIAN  
OLIVE TREE IN BOULDER. THE TREE BARELY HIT AND ONLY  
SLIGHTLY DAMAGED A PARKED CAR.  
IN 1995...THUNDERSTORM WINDS FROM THE WEST GUSTED TO 55 MPH  
AT DENVER INTERNATIONAL AIRPORT.  
IN 2002...HEAVY THUNDERSTORM RAINFALL CAUSED FLASH FLOODING  
IN THE HAYMAN FIRE BURN AREA. SOUTH DECKERS ROAD...STATE  
HIGHWAY 126...WAS CLOSED WHEN 4 FEET OF WATER INUNDATED  
A SECTION OF THE ROADWAY. THE U.S. FOREST SERVICE HAD  
TO REMOVE 40 TRUCK LOADS OF SEDIMENT TO REOPEN THE ROAD.  
ALSO...HEAVY DEBRIS FLOW WASHED OUT A SECONDARY SERVICE  
ROAD IN SOUTHWEST DOUGLAS COUNTY. HAIL AS LARGE AS 3/4  
INCH IN DIAMETER FELL NEAR BENNETT.  
IN 2011...LIGHTNING STRUCK A HOME IN ARAPAHOE COUNTY AND  
CAUSED SUBSTANTIAL FIRE DAMAGE. FIVE PEOPLE WERE IN THE  
HOME BUT NO ONE WAS INJURED. THERE WAS STRUCTURAL DAMAGE  
TO BOTH THE INTERIOR AND EXTERIOR OF THE RESIDENCE.  
 

 
 
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