998  
NOUS45 KBOU 170859  
PNSBOU  
COZ030>051-172300-  
 
PUBLIC INFORMATION STATEMENT  
NATIONAL WEATHER SERVICE DENVER/BOULDER CO  
259 AM MDT TUE JUL 17 2018  
   
..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.  
16-18 IN 1997...AN EXTENDED HOT SPELL RESULTED IN 3 TEMPERATURE  
RECORDS BEING SET. THE MAXIMUM TEMPERATURE REACHED 98  
DEGREES ON EACH OF THE DAYS...SETTING RECORDS ON THE 16TH  
AND 18TH. THE LOW TEMPERATURE OF 71 DEGREES ON THE 17TH  
WAS A RECORD HIGH MINIMUM FOR THE DATE. THE HIGH  
TEMPERATURE REACHED 100 DEGREES ON THE 17TH AT THE SITE  
OF THE FORMER STAPLETON INTERNATIONAL AIRPORT.  
17 IN 1872...THE U.S. ARMY SIGNAL SERVICE WEATHER OBSERVER  
RECORDED SNOWFALL DURING THE EARLY MORNING HOURS IN THE  
HAND WRITTEN DAILY WEATHER JOURNAL: "RAIN COMMENCED AT  
1:30 A.M. CHANGING ABOUT 3 A.M. TO SNOW & IN ABOUT HALF  
AN HOUR TO RAIN AGAIN; IT CONTINUED UNTIL 6 A.M." THIS  
IS THE ONLY RECORDED OCCURRENCE OF SNOWFALL IN DENVER IN  
JULY...BUT THIS REPORT IS NOT INCLUDED IN THE "OFFICIAL"  
STATION SNOWFALL RECORDS...WHICH DID NOT BEGIN IN DENVER  
UNTIL JANUARY 1...1882. THE LOW TEMPERATURE ON THIS  
MORNING WAS 45 DEGREES...WHICH IS SUFFICIENTLY COLD FOR  
THE OCCURRENCE OF LIGHT STRATIFORM SNOWFALL.  
IN 1918...A THUNDERSTORM PRODUCED HAIL TO AN INCH IN DEPTH  
ON THE GROUND. THE STONES VARIED IN SIZE FROM A SMALL  
CHERRY STONE TO NEARLY 1/2 INCH IN DIAMETER. NOT MUCH  
PERMANENT DAMAGE WAS DONE TO CROPS. PRECIPITATION  
TOTALED 0.40 INCH...AND NORTHEAST WINDS WERE SUSTAINED  
TO 25 MPH WITH GUSTS TO 28 MPH.  
IN 1971...THE TEMPERATURE REACHED A HIGH OF 101 DEGREES AT  
STAPLETON INTERNATIONAL AIRPORT.  
IN 1983...3/4 INCH DIAMETER HAIL FELL AT LAFAYETTE...WHILE  
GOLF BALL SIZE HAIL PELTED BRIGHTON AND NORTHGLENN WHERE  
FUNNEL CLOUDS WERE ALSO SIGHTED.  
IN 1986...1 1/2 INCHES OF RAIN FELL IN AN HOUR AND 15 MINUTES  
IN SOUTHEASTERN AURORA. THUNDERSTORM RAINFALL TOTALED  
0.89 INCHES AT STAPLETON INTERNATIONAL AIRPORT.  
IN 1987...A SMALL TORNADO WAS SIGHTED NEAR WATKINS...IN THE  
VICINITY OF FRONT RANGE AIRPORT.  
IN 1997...LIGHTNING IGNITED AN OIL WELL TANK HOLDING 10  
THOUSAND GALLONS OF OIL...16 MILES NORTHWEST OF BENNETT.  
ABOUT 200 ACRES OF GRASSLAND BURNED BEFORE THE FIRE COULD  
BE EXTINGUISHED. A DRY MICROBURST PRODUCED A WIND GUST TO  
52 MPH AT DENVER INTERNATIONAL AIRPORT.  
IN 2000...AN ESTIMATED 2 INCHES OF RAIN FELL IN LESS THAN AN  
HOUR...CAUSING TWO SECONDARY ROADS IN BUCK AND MILLER GULCHES  
IN THE HI MEADOWS FIRE BURN AREA TO WASH OUT. WATER  
ALSO COVERED JEFFERSON COUNTY ROAD 68 WHICH CONNECTS TO  
BAILEY. HOMEOWNERS IN PINE VALLEY ESTATES ATTEMPTED TO  
DIVERT SOME OF THE RUNOFF BY PILING STACKS OF HAY ON THE  
HILLSIDE ABOVE THEIR HOMES. TORRENTIAL RAINFALL...UP TO  
3.50 INCHES AN HOUR...CAUSED FLASH FLOODING ALONG WHISKEY  
GULCH NEAR ELIZABETH. SEVERAL ROADS WERE WASHED OUT AND  
BASEMENTS FLOODED DURING THE STORM. ALONG COUNTY ROAD 13...  
ABOUT 6 MILES NORTH-NORTHWEST OF ELIZABETH...RUSHING WATER  
WASHED AWAY A 15-FOOT SECTION OF THE ROAD. THE FLOODWATERS  
FORCED DEBRIS AND MUD INTO FOUR HUGE CULVERTS...SENDING WATER  
OVER THE ROAD. AT DENVER INTERNATIONAL AIRPORT...AN UNITED  
AIRLINES GROUND CREW WORKER WAS STRUCK BY LIGHTNING AS SHE  
WAS LOADING A BOEING 747 JUMBO JET. THE WOMAN WAS INJURED  
WHEN LIGHTNING EITHER HIT THE JET OR THE LOADING EQUIPMENT  
THAT SHE WAS WORKING NEAR. THE 25-YEAR-OLD WOMAN RECEIVED  
ONLY MINOR INJURIES.  
IN 2006...OUTFLOW FROM SEVERE THUNDERSTORMS TO THE SOUTHEAST  
OF METRO DENVER PRODUCED SOUTHEAST SUSTAINED WINDS TO 35  
MPH WITH GUSTS AS HIGH AS 52 MPH AT DENVER INTERNATIONAL  
AIRPORT DURING THE LATE EVENING.  
IN 2011...A DELUGE OF HEAVY RAIN OCCURRED IN AND AROUND  
NEDERLAND WHEN THE STORM DUMPED NEARLY 2 INCHES OF RAIN IN  
30 MINUTES. THE HEAVY RAINFALL WASHED OUT HILLSIDES AND  
DIRT ROADS. IN NEDERLAND...A CULVERT BECAME BLOCKED WITH  
DEBRIS AND FORCED THE WATER TO SPREAD INTO A NEARBY  
BOOKSTORE. THE RAINFALL ALSO DAMAGED SEVERAL RESIDENTIAL  
ROADS IN THE SUNNYSIDE SUBDIVISION AND NAVAJO ROAD BECAME  
IMPASSABLE. SEVERAL HOMES SUFFERED FLOOD DAMAGE AS THE  
RUNOFF FROM A NEARBY BEAVER CREEK JUMPED ITS BANKS AND  
FLOODED GARAGES...LIVING ROOMS AND BEDROOMS OF NEARBY  
HOUSES.  
IN 2016...A SEVERE THUNDERSTORM PRODUCED HAIL UP TO ONE INCH  
IN DIAMETER NEAR BUCKLEY AIR FORCE BASE.  
 

 
 
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