699  
NOUS45 KBOU 200859  
PNSBOU  
COZ030>051-202300-  
 
PUBLIC INFORMATION STATEMENT  
NATIONAL WEATHER SERVICE DENVER/BOULDER CO  
259 AM MDT SUN AUG 20 2017  
   
..TODAY IN METRO DENVER WEATHER HISTORY
 
 
19-30 IN 1875...GRASSHOPPERS APPEARED IN GREAT NUMBERS AT 10:00 AM  
ON THE 19TH. THOUSANDS LANDED ON THE GROUND. THE STREETS  
WERE LITERALLY COVERED WITH THEM. SWARMS OF GRASSHOPPERS  
WERE SEEN ON EACH DAY. ALL GARDENS IN THE CITY WERE  
DEVASTATED...AND IN THE COUNTRYSIDE THE GRASSHOPPERS WERE  
VERY DESTRUCTIVE TO RIPENED GRAIN. ON THE 30TH THE  
GRASSHOPPERS WERE SO NUMEROUS AS TO ALMOST DARKEN THE SUN.  
20 IN 1980...WINDS TO 55 TO 60 MPH WERE RECORDED IN SOUTH  
BOULDER.  
IN 1982...STRONG THUNDERSTORM WINDS BLASTED THE JEFFERSON  
COUNTY AIRPORT NEAR BROOMFIELD...CAUSING AN ESTIMATED 3  
MILLION DOLLARS IN DAMAGE. AT LEAST 5 HANGARS AND 15  
AIRPLANES WERE DAMAGED...MANY SERIOUSLY; ONE HANGAR WAS  
COMPLETELY DESTROYED. TORRENTIAL RAINS ACCOMPANIED THE  
WINDS. HEAVY RAINS ALSO DUMPED ON BOULDER WHERE 1.65  
INCHES FELL IN JUST 15 MINUTES...CAUSING STREET FLOODING.  
WIND GUSTS TO 72 MPH WERE RECORDED IN BOULDER. OVER HALF  
AN INCH OF RAIN FELL IN JUST 5 MINUTES IN LITTLETON WHERE  
TWO HOMES WERE STRUCK BY LIGHTNING. LIGHTNING ALSO STRUCK  
A HOUSE IN ARVADA WHERE OVER AN INCH OF RAIN SENT RALSTON  
CREEK OVER ITS BANKS. STRONG WINDS ACCOMPANIED THE STORMS.  
IN 1984...SLOW MOVING THUNDERSTORMS DUMPED 1.25 INCHES OF RAIN  
IN EVERGREEN...CAUSING STREET FLOODING. A HALF INCH OF RAIN  
FELL IN JUST 18 MINUTES IN SOUTHEAST DENVER. LITTLETON AND  
BOULDER WERE ALSO DRENCHED WITH ABOUT AN INCH OF RAIN.  
RAINFALL TOTALED 0.92 INCH AT STAPLETON INTERNATIONAL  
AIRPORT.  
IN 2001...SEVERE THUNDERSTORMS PRODUCED DAMAGING WINDS AND  
LARGE HAIL ACROSS METRO DENVER. HAIL AS LARGE 1 INCH IN  
DIAMETER FELL IN AURORA NEAR CHERRY CREEK. STRONG  
THUNDERSTORM WINDS GUSTING AS HIGH AS 58 MPH BLEW THE ROOF  
FROM A BUILDING BETWEEN THORNTON AND DENVER AND TOPPLED  
SEVERAL TREES IN DENVER. ONE TREE LANDED ON A MAIL TRUCK.  
OTHER THUNDERSTORM WINDS WERE CLOCKED TO 60 MPH NEAR PARKER...  
62 MPH IN BROOMFIELD...AND 61 MPH AT DENVER INTERNATIONAL  
AIRPORT.  
IN 2006...A TORNADO (F0) TOUCHED DOWN NEAR BENNETT...BUT CAUSED  
NO REPORTED DAMAGE.  
IN 2013...SEVERE THUNDERSTORMS POUNDED THE SOUTHERN DENVER  
SUBURBS AND OTHER PARTS OF THE FRONT RANGE. IN JEFFERSON  
COUNTY...WATER RESCUES WERE REPORTED FOR SOME PEOPLE IN  
STRANDED CARS. IN THE KEN CARYL AREA...LARGE HAIL FROM ONE  
INCH TO 1 3/4 INCHES IN DIAMETER WAS REPORTED. ON WEST  
CHATFIELD AVENUE IN JEFFERSON COUNTY...HAIL RUNOFF GATHERED  
SIX INCHES DEEP IN SPOTS AND "HAIL PLOWS" WERE SENT OUT TO  
CLEAR SOME STREETS. HAIL UP TO ONE INCH IN DIAMETER WAS  
ALSO REPORTED NEAR CASTLE ROCK.  
 

 
 
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