048  
NOUS45 KBOU 210045  
PNSBOU  
COZ030>051-212300-  
 
PUBLIC INFORMATION STATEMENT  
NATIONAL WEATHER SERVICE DENVER/BOULDER CO  
645 PM MDT SAT APR 20 2019  
   
..THIS WEEK IN METRO DENVER WEATHER HISTORY
 
 
19-21 IN 1984...A LARGE SNOWSTORM BURIED MOST OF COLORADO UNDER A  
THICK MANTLE OF WET SNOW. TOTAL SNOW AMOUNTS RANGED FROM  
10 TO 20 INCHES ACROSS METRO DENVER AND A WHOPPING 20 TO  
40 INCHES IN THE ADJACENT FOOTHILLS. THE SNOW CLOSED ROADS  
AND DAMAGED ELECTRICAL TRANSFORMERS...CAUSING NUMEROUS POWER  
OUTAGES. NEARLY 14 INCHES (13.6) OF SNOW FELL AT STAPLETON  
INTERNATIONAL AIRPORT WHERE THE COMBINATION OF SNOW AND  
WIND CLOSED ALL BUT ONE RUNWAY...RESULTING IN THE CANCELLATION  
OF MANY FLIGHTS. BOTH I-70 AND I-76 WERE CLOSED TO THE EAST  
OF DENVER.  
19-22 IN 1933...A MAJOR STORM DUMPED 16.8 INCHES OF SNOWFALL OVER  
DOWNTOWN DENVER WHEN RAIN CHANGED TO SNOW DURING THE EARLY  
MORNING OF THE 20TH AND CONTINUED THROUGH MIDDAY OF THE  
22ND. MOST OF THE SNOW FELL ON THE 21ST. DUE TO MELTING...  
THE MOST SNOW ON THE GROUND WAS 10.5 INCHES AT 6:00 PM ON THE  
21ST. BEFORE THE SNOW STARTED...A STRONG COLD FRONT ON THE  
EVENING OF THE 19TH PRODUCED NORTH WINDS SUSTAINED TO 35 MPH  
WITH GUSTS TO 37 MPH. THE STRONG WINDS DEPOSITED A THIN  
LAYER OF DUST ON THE CITY. NORTH TO NORTHWEST WINDS WERE  
SUSTAINED TO 31 MPH WITH GUSTS TO 35 MPH ON THE 20TH AND TO  
29 MPH WITH GUSTS TO 32 MPH ON THE 21ST.  
20-22 IN 1957...STRONG AND GUSTY SOUTH TO SOUTHEAST WINDS RAKED  
METRO DENVER EACH DAY. THE STRONGEST WIND GUST OF 55 MPH  
OCCURRED ON THE 21ST WHEN BLOWING DUST BRIEFLY REDUCED THE  
VISIBILITY TO 3/4 MILE AT STAPLETON AIRPORT.  
20-23 IN 1989...UNUSUALLY WARM WEATHER RESULTED IN SEVERAL DAILY  
TEMPERATURE RECORDS BEING BROKEN IN DENVER. THE HIGH  
TEMPERATURE OF 89 DEGREES ON THE 21ST EXCEEDED THE RECORD  
MAXIMUM FOR THE MONTH AT THAT TIME. DAILY RECORD HIGH  
TEMPERATURES WERE EITHER EXCEEDED OR EQUALED WITH 83  
DEGREES ON THE 20TH...88 DEGREES ON THE 22ND...AND 85  
DEGREES ON THE 23RD. THE LOW TEMPERATURE OF 55 DEGREES  
ON THE 22ND EQUALED THE RECORD HIGH MINIMUM FOR THE DATE.  
21 IN 1885...RAIN CHANGED TO SNOW DURING THE EARLY MORNING AND  
WAS THE HEAVIEST SNOW OF THE SEASON. TOTAL SNOWFALL WAS  
ESTIMATED AT 8.0 INCHES OVER DOWNTOWN DENVER...BUT THE  
SNOW MELTED RAPIDLY ON THE GROUND AS IT FELL. HOWEVER...  
THE WEIGHT OF THE SNOW...AS WELL AS NORTHWEST WINDS  
SUSTAINED TO 29 MPH DOWNED TELEGRAPH AND TELEPHONE WIRES.  
SEVERAL LARGE BRANCHES OF TREES WERE ALSO BROKEN BY THE  
WEIGHT OF THE SNOW. PRECIPITATION TOTALED 1.01 INCHES  
FROM THE STORM.  
IN 1887...WEST WINDS WERE SUSTAINED TO 47 MPH.  
IN 1932...THE TEMPERATURE DIPPED TO A LOW OF ONLY 60 DEGREES...  
THE ALL-TIME RECORD HIGH MINIMUM FOR THE MONTH.  
IN 1988...A SMALL TORNADO WAS OBSERVED BY NATIONAL WEATHER  
SERVICE EMPLOYEES ABOUT 3 MILES NORTHWEST OF THORNTON. IT  
WAS ON THE GROUND FOR ABOUT 2 MINUTES. NO DAMAGE WAS  
REPORTED. LATER...LIGHTNING STRUCK TWO 14-YEAR-OLD GIRLS ON  
A SOFTBALL FIELD IN WESTMINSTER. ONE WAS KILLED...WHILE THE  
OTHER SUFFERED MODERATE INJURIES. NORTHWEST WINDS GUSTED  
TO 44 MPH AT STAPLETON INTERNATIONAL AIRPORT BEHIND A  
COLD FRONT.  
IN 2010...SEVERE THUNDERSTORMS PRODUCED LARGE HAIL...STRONG  
WINDS AND A TORNADO ACROSS PARTS OF ADAMS...ARAPAHOE...  
ELBERT...AND WELD COUNTIES. THE HAIL...UP TO 1.50 INCHES  
IN DIAMETER...CAME DOWN SO HEAVY ALONG PARTS OF I-70  
AND I-76 THAT SNOWPLOWS HAD TO BE CALLED OUT TO REMOVE  
IT. NUMEROUS VEHICLES WERE DAMAGED BY HAIL. IN WELD  
COUNTY...VERY HEAVY RAIN AND HAIL ACCOMPANIED  
THUNDERSTORM WINDS UP TO 75 MPH. HAIL UP TO 1.50 INCHES  
WAS REPORTED NEAR BENNETT; 1.25 INCHES...5.3 MILES EAST  
OF ENGLEWOOD; 1.0 INCH SIZE HAIL NEAR BUCKLEY FIELD; WITH  
0.88 INCH SIZE HAIL NEAR BOULDER. A WEAK TORNADO TOUCHED  
DOWN BRIEFLY IN ELBERT COUNTY...ABOUT 9 MILES SOUTHWEST OF  
DEER TRAIL...BUT DID NO DAMAGE. SEVERAL MINOR ACCIDENTS  
WERE REPORTED WITH SNOWPACKED AND SLICK ROAD CONDITIONS  
ALONG WITH VERY LOW VISIBILITIES. MINOR STREET FLOODING  
WAS REPORTED IN SOUTHEAST AURORA. DENVER INTERNATIONAL  
AIRPORT RECORDED 0.30 INCHES OF RAINFALL. ALSO...A PEAK  
WIND GUST TO 36 MPH FROM THE SOUTHEAST WAS OBSERVED AT  
THE AIRPORT.  
21-22 IN 1910...NORTH WINDS WERE SUSTAINED TO 45 MPH BEHIND A COLD  
FRONT. RAINFALL TOTALED 0.63 INCH.  
IN 1923...SNOWFALL OF 2.0 INCHES IN THE CITY WAS THE ONLY  
SNOW OF THE MONTH AND THE LAST MEASURABLE SNOW OF THE  
SEASON. NORTHWEST WINDS WERE SUSTAINED TO 25 MPH ON  
THE 21ST.  
IN 1952...HEAVY SNOWFALL TOTALED 7.6 INCHES AT STAPLETON  
AIRPORT. THE STORM WAS ACCOMPANIED BY NORTH WINDS GUSTING  
TO 33 MPH.  
IN 2001...THE SECOND MAJOR SNOW STORM IN 11 DAYS MOVED INTO  
METRO DENVER WITH BLIZZARD CONDITIONS DEVELOPING AGAIN  
ACROSS THE PLAINS TO THE NORTHEAST OF DENVER. SNOWFALL  
AMOUNTS RANGED UP TO 9 INCHES IN METRO DENVER WITH UP TO  
23 INCHES IN THE FOOTHILLS. NORTHWEST WINDS WERE SUSTAINED  
AT 20 TO 30 MPH WITH GUSTS AS HIGH AS 36 MPH AT DENVER  
INTERNATIONAL AIRPORT WHICH WAS AGAIN SHUT DOWN FOR NEARLY  
AN HOUR BY POWER OUTAGES ON THE 22ND. THE OUTAGES AFFECTED  
LIGHTING IN THE CONCOURSES...TRAIN OPERATIONS...DE-ICING AND  
REFUELING OPERATIONS...FLIGHT INFORMATION DISPLAYS...AND  
SECURITY SCREENINGS. NAVIGATIONAL AIDS WERE ALSO AFFECTED...  
RESULTING IN THE CANCELLATION OF 58 ARRIVING AND DEPARTING  
FLIGHTS WHICH STRANDED ABOUT 5000 PASSENGERS. ACROSS METRO  
DENVER STORM TOTALS INCLUDED: 9 INCHES AT ELDORADO SPRINGS;  
7 INCHES IN BOULDER; 6 INCHES AT KEN CARYL...NORTHGLENN AND  
NEAR SEDALIA; AND 5 INCHES IN ARVADA AND MORRISON. ONLY  
1.7 INCHES OF SNOW WERE MEASURED AT THE SITE OF THE FORMER  
STAPLETON INTERNATIONAL AIRPORT. IN THE FOOTHILLS SNOW  
TOTALS INCLUDED: 23 INCHES NEAR FRITZ PEAK SOUTH OF  
ROLLINSVILLE...17 INCHES NEAR JAMESTOWN...16 INCHES NEAR  
BLACKHAWK...14 INCHES IN COAL CREEK CANYON...13 INCHES AT  
IDAHO SPRINGS AND NEAR NEDERLAND...11 INCHES AT ASPEN  
SPRINGS...AND 10 INCHES NEAR BERGEN PARK.  
21-23 IN 1999...A SPRING SNOWSTORM DUMPED HEAVY SNOWFALL OVER METRO  
DENVER AND IN THE FOOTHILLS. NEARLY 3 FEET OF SNOW FELL  
IN THE FOOTHILLS WITH OVER A FOOT IN THE CITY. THE HEAVY  
WET SNOW DOWNED POWER LINES IN DOUGLAS AND ELBERT COUNTIES.  
SCATTERED OUTAGES WERE REPORTED AT PARKER...FRANKTOWN...  
SEDALIA...AND CASTLE ROCK. SOME RESIDENTS WERE WITHOUT  
ELECTRICITY FOR AS LONG AS 20 HOURS. THE INCLEMENT WEATHER  
WAS BLAMED...AT LEAST IN PART...FOR SEVERAL TRAFFIC ACCIDENTS  
ALONG THE I-25 CORRIDOR BETWEEN DENVER AND CASTLE ROCK.  
SNOWFALL TOTALS INCLUDED: 32 INCHES AT IDAHO SPRINGS; 31  
INCHES ON CROWHILL; 29 INCHES NEAR EVERGREEN; 26 INCHES AT  
CHIEF HOSA AND COAL CREEK CANYON; 25 INCHES AT BAILEY; 24  
INCHES AT FLOYD HILL; 23 INCHES AT CONIFER...GENESEE...GOLDEN  
GATE CANYON...NORTH TURKEY CREEK...AND PINE JUNCTION; 13  
INCHES AT BROOMFIELD AND NEAR SEDALIA; 12 INCHES IN  
BOULDER; 11 INCHES AT LOUISVILLE AND PARKER; AND 9 INCHES  
AT THE SITE OF THE FORMER STAPLETON INTERNATIONAL AIRPORT.  
IN 2004...HEAVY SNOW FELL ACROSS METRO DENVER...WHEN LOW LEVEL  
UPSLOPE CONDITIONS DEVELOPED AGAINST THE FOOTHILLS AND  
PALMER DIVIDE. SNOWFALL TOTALS INCLUDED: 18 INCHES IN THE  
FOOTHILLS SOUTHWEST OF BOULDER...17 INCHES AT INTERCANYON AND  
NEAR CONIFER...10 INCHES NEAR BLACKHAWK AND PARKER...9 INCHES  
AT CASTLE ROCK AND NEAR SEDALIA...7 INCHES IN CENTENNIAL...  
LITTLETON...AND NEAR LONE TREE. ELSEWHERE ACROSS METRO  
DENVER...SNOWFALL GENERALLY RANGED FROM 2 TO 5 INCHES.  
SNOWFALL WAS 4.7 INCHES AT DENVER STAPLETON. NORTHWEST  
WINDS GUSTED TO 35 MPH AT DENVER INTERNATIONAL AIRPORT  
ON THE 21ST.  
22 IN 1896...SOUTHWEST WINDS WERE SUSTAINED TO 39 MPH WITH GUSTS  
AS HIGH 56 MPH. THE APPARENT CHINOOK WINDS WARMED THE  
TEMPERATURE TO A HIGH OF 78 DEGREES.  
IN 1904...WEST WINDS SUSTAINED TO 40 MPH WITH GUSTS TO 48 MPH  
WARMED THE TEMPERATURE TO A HIGH OF 69 DEGREES.  
IN 1925...SOUTHEAST WINDS SUSTAINED TO 42 MPH WITH GUSTS  
TO 46 MPH WARMED THE TEMPERATURE TO A HIGH OF 76 DEGREES.  
IN 1958...WEST-NORTHWEST WINDS GUSTED TO 48 MPH AT STAPLETON  
AIRPORT.  
22-23 IN 1885...THE WORST SNOW STORM SINCE STATION RECORDS BEGAN IN  
1872 DUMPED A TOTAL OF 24.0 INCHES OF SNOWFALL ON THE CITY.  
THE 23.0 INCHES OF SNOW RECORDED ON THE 22ND AND 23RD WAS  
THE GREATEST 24-HOUR SNOWFALL EVER RECORDED DURING THE  
MONTH OF APRIL. STREETS WERE IMPASSABLE...ROOFS CAVED IN...  
TELEGRAPH AND TELEPHONE WIRES WERE DOWNED...RAILROADS WERE  
BLOCKED AND TRAINS DELAYED...AND MOST BUSINESS CAME TO A  
COMPLETE STANDSTILL. ESTIMATED LOSSES WERE REPORTED TO  
50 THOUSAND DOLLARS. THE TOTAL SNOWFALL WAS PARTLY  
ESTIMATED DUE TO MELTING. PRECIPITATION FROM THE STORM  
TOTALED 2.79 INCHES.  
IN 1915...POST-FRONTAL RAIN DURING THE DAY AND OVERNIGHT  
TOTALED 2.00 INCHES. MOST OF THE RAIN FELL ON THE 22ND.  
IN 1945...6.7 INCHES OF SNOW FELL OVER DOWNTOWN DENVER. THIS  
WAS THE THIRD MAJOR SNOW IN A LITTLE OVER 3 WEEKS...WHICH  
MADE THIS MONTH THE 4TH SNOWIEST ON RECORD. NORTHEAST WINDS  
WERE SUSTAINED TO 25 MPH AND LIGHT HAIL FELL ON THE 22ND.  
IN 2013...A SPRING STORM BROUGHT HEAVY SNOW TO THE MOUNTAINS...  
WITH PERIOD OF MODERATE TO HEAVY SNOW TO PORTIONS OF THE  
FRONT RANGE FOOTHILLS AND URBAN CORRIDOR. IN THE MOUNTAINS  
AND FOOTHILLS...STORM TOTALS INCLUDED: 18 INCHES AT NIWOT  
RIDGE SNOTEL; 16.5 INCHES NEAR WARD; 13 INCHES AT ARAPAHOE  
BASIN AND ROACH SNOTEL...12 INCHES NEAR BLACKHAWK; 11.5  
INCHES NEAR NEDERLAND; 11 INCHES NEAR ALLENSPARK AND AT  
LOVELAND SKI AREA; 10 INCHES NEAR IDAHO SPRINGS AND  
PINECLIFFE; WITH 9.5 INCHES AND NEAR SILVERTHORNE. ALONG  
THE URBAN CORRIDOR STORM TOTALS INCLUDED: 7.5 INCHES NEAR  
MORRISON; 7 INCHES AT THE NATIONAL WEATHER SERVICE OFFICE  
IN BOULDER AND NIWOT; 6.5 INCHES NEAR ARAPAHOE PARK AND  
SUPERIOR; WITH 6 INCHES AT LAFAYETTE AND LAKEWOOD. AT  
DENVER INTERNATIONAL AIRPORT...4.7 INCHES OF NEW SNOWFALL  
WAS OBSERVED.  
22-24 IN 2010...A POTENT SPRING STORM BROUGHT HEAVY...WET SNOW TO  
AREAS IN AND NEAR THE FRONT RANGE FOOTHILLS AND WIDESPREAD  
RAINFALL ACROSS THE ADJACENT PLAINS. IN THE FRONT RANGE  
FOOTHILLS AND NORTH-CENTRAL MOUNTAINS EAST OF THE  
CONTINENTAL DIVIDE...STORM TOTALS RANGED FROM 15 TO 30  
INCHES. STORM TOTALS INCLUDED: 29.5 INCHES...3 MILES  
SOUTHEAST OF PINECLIFFE; 27 INCHES...8 MILES NORTHEAST  
OF FOUR CORNERS; 23 INCHES AT WILLOW CREEK; 22.5 INCHES...  
13 MILES NORTHWEST OF GOLDEN; 21 INCHES AT NEVER SUMMER;  
17 INCHES AT ELDORADO SPRINGS; 16.5 INCHES...3 MILES WEST  
OF JAMESTOWN. DENVER INTERNATIONAL AIRPORT REPORTED JUST  
A TRACE OF SNOWFALL...BUT MEASURED 2.01 INCHES OF RAINFALL  
FOR THE DURATION OF THE STORM. IN ADDITION...A PEAK WIND  
GUST TO 54 MPH FROM THE NORTHWEST WAS OBSERVED AT THE  
AIRPORT ON THE 23RD  
23 IN 1889...NORTH WINDS WERE SUSTAINED TO 48 MPH.  
IN 1913...NORTHEAST WINDS WERE SUSTAINED TO 46 MPH WITH GUSTS  
TO 60 MPH BEHIND A DRY COLD FRONT.  
IN 1914...A THUNDERSTORM PRODUCED CONSIDERABLE HAIL AND 0.29  
INCH OF RAIN. WEST WINDS WERE SUSTAINED TO 42 MPH WITH  
GUSTS TO 48 MPH.  
IN 1942...HAIL OF UNKNOWN SIZE FELL OVER THE CITY.  
IN 1958...A FUNNEL CLOUD WAS SIGHTED FOR 20 MINUTES...15 MILES  
SOUTHEAST OF STAPLETON AIRPORT. THE FUNNEL FORMED IN  
ADVANCE OF A THUNDERSTORM AND HUNG ABOUT A THOUSAND FEET  
BELOW THE BASE OF THE CLOUD...BUT REMAINED ALOFT. LATER IN  
THE DAY...3.6 INCHES OF SNOW FELL AT STAPLETON AIRPORT.  
IN 2002...PERSISTENT DRY CONDITIONS IN THE FOOTHILLS  
CONTRIBUTED TO THE FIRST LARGE FOREST FIRE OF THE SEASON  
NEAR BAILEY. VERY DRY AND WINDY CONDITIONS ALLOWED THE  
FIRE...INITIALLY STARTED BY A CARELESS SMOKER...TO GROW  
INTO A 2400-ACRE BLAZE BEFORE IT COULD BE CONTAINED.  
FORTUNATELY...NO SIGNIFICANT DAMAGE OCCURRED TO HOMES OR  
OTHER PROPERTY IN THE AREA.  
IN 2006...SEVERE THUNDERSTORMS PRODUCED LARGE HAIL ACROSS  
METRO DENVER. HAIL AS LARGE AS 1.25 INCHES IN DIAMETER  
FELL IN SOUTH DENVER WITH HAIL TO 0.88 INCH ACROSS THE  
REST OF THE CITY. HAIL TO 1.00 INCH IN DIAMETER WAS  
REPORTED NEAR MORRISON...IN SOUTH LAKEWOOD...AND IN AURORA  
NEAR CHERRY CREEK. HAIL TO 0.88 INCH WAS MEASURED IN  
GOLDEN WITH 0.75 INCH HAIL IN EAST LAKEWOOD.  
23-24 IN 1883...SNOWFALL TOTALED 7.6 INCHES IN DOWNTOWN DENVER.  
IN 1904...A THUNDERSTORM PRODUCED HAIL DURING THE LATE EVENING  
OF THE 23RD. APPARENT POST-FRONTAL RAIN CHANGED TO SNOW  
DURING THE EARLY MORNING OF THE 24TH...BUT TOTALED ONLY 2.0  
INCHES. PRECIPITATION CONSISTING OF RAIN...MELTED HAIL...AND  
SNOW TOTALED 0.60 INCH. NORTHEAST WINDS WERE SUSTAINED TO  
41 MPH WITH GUSTS AS HIGH AS 52 MPH ON THE 24TH.  
IN 1905...RAIN CHANGED TO SNOW AND TOTALED 8.0 INCHES. MUCH  
OF THE SNOW MELTED AS IT FELL WITH ONLY 2.5 INCHES MEASURED  
ON THE GROUND. PRECIPITATION TOTALED 1.88 INCHES.  
NORTHEAST WINDS WERE SUSTAINED TO 20 MPH ON THE 23RD.  
IN 1942...THE SOUTH PLATTE RIVER REACHED FLOOD CONDITIONS IN  
THE CITY. AS MANY AS 15 THOUSAND RESIDENTS WERE WARNED  
TO EVACUATE THEIR HOMES TEMPORARILY. TWO LIVES WERE LOST  
IN THE CITY. FOUR BRIDGES WERE WASHED OUT BY THE FLOOD  
WATERS AND OTHER BRIDGES WERE ENDANGERED. THE DAMAGE WAS  
GENERALLY LIMITED TO BRIDGES THAT WERE IN POOR CONDITION.  
HOWEVER...THE FLOOD WATERS DID NOT OVERFLOW THEIR CHANNEL  
BANKS WITHIN THE CITY LIMITS.  
IN 1980...HEAVY RAIN BEGAN IN THE EASTERN FOOTHILLS ON THE  
NIGHT OF THE 23RD AND TURNED TO HEAVY WET SNOW ON THE 24TH.  
UP TO A FOOT AND A HALF OF SNOW FELL IN THE FOOTHILLS WEST  
OF DENVER. AT STAPLETON INTERNATIONAL AIRPORT PRECIPITATION  
TOTALED 1.58 INCHES...BUT ONLY 3.7 INCHES OF SNOW FELL FROM  
THE STORM. EAST WINDS GUSTED TO 24 MPH.  
IN 1997...LOCATIONS IN AND NEAR THE FOOTHILLS RECEIVED THE  
GREATEST SNOW OF THE YEAR AS A WINTER-LIKE STORM SYSTEM  
MOVED INTO METRO DENVER. EAST TO SOUTHEAST WINDS AT SPEEDS  
OF 15 TO 35 MPH WERE COMMON WITH EVEN STRONGER GUSTS ABOVE  
9 THOUSAND FEET. SNOW FELL AT A RATE OF 2 TO 3 INCHES AN  
HOUR AS DEEP UPSLOPE COMBINED WITH A MOIST AND UNSTABLE  
AIR MASS. THE SNOW BEGAN IN THE FOOTHILLS ABOVE 7500 FEET  
DURING THE EVENING OF THE 23RD. BY SUNRISE THE SNOW LEVEL  
HAD DROPPED TO 5000 FEET. THE HARDEST HIT AREAS EXTENDED  
FROM I-25 INTO THE FOOTHILLS. SNOWFALL TOTALS IN THE  
FOOTHILLS RANGED FROM 1 1/2 TO OVER 3 1/2 FEET. IN THE  
CITY...SNOWFALL RANGED FROM 8 TO 18 INCHES. SOME SNOWFALL  
AMOUNTS INCLUDED: 36 INCHES AT COAL CREEK CANYON; 31 INCHES  
AT NEDERLAND AND WONDERVU; 20 TO 24 INCHES NEAR BLACKHAWK...  
AT ECHO LAKE...AND NORTH TURKEY CREEK CANYON; 15 TO 19 INCHES  
AT BOULDER...CENTRAL CITY...CONIFER...EVERGREEN...GEORGETOWN...  
AND LOUISVILLE; 8 TO 14 INCHES IN ARVADA...BROOMFIELD...  
WESTMINSTER...WHEAT RIDGE...CASTLE ROCK...AND KEN CARYL RANCH.  
ONLY 2.3 INCHES OF SNOW FELL AT THE SITE OF THE FORMER  
STAPLETON INTERNATIONAL AIRPORT ON THE 24TH. EAST WINDS  
GUSTED TO 36 MPH AT DENVER INTERNATIONAL AIRPORT ON THE  
24TH.  
IN 2003...A STRONG AND DEEP NORTHERLY FLOW CIRCULATING AROUND  
A CLOSED UPPER LOW PRESSURE CENTER ALLOWED HEAVY SNOW TO  
FALL IN THE MOUNTAINS AND EASTERN FOOTHILLS. SNOWFALL  
TOTALED 14 INCHES IN IDAHO SPRINGS. RAIN WAS MIXED WITH  
SNOW AND THUNDER ACROSS METRO DENVER. SNOWFALL WAS ONLY  
0.9 INCH OVERNIGHT AT THE SITE OF THE FORMER STAPLETON  
INTERNATIONAL AIRPORT. PRECIPITATION TOTALED 1.34 INCHES  
AT DENVER INTERNATIONAL AIRPORT...WHERE NORTHWEST WINDS  
GUSTED TO 55 MPH ON THE 23RD.  
IN 2007...A STORM SYSTEM INTENSIFIED OVER SOUTHEAST COLORADO...  
ALLOWING FOR HEAVY SNOW AND RAIN TO DEVELOP OVER MUCH OF  
NORTH-CENTRAL AND NORTHEAST COLORADO. SEVERE THUNDERSTORMS  
PRECEDED THE STORM SYSTEM ON THE 23RD...AFFECTING THE URBAN  
CORRIDOR. NICKEL SIZE HAIL WAS REPORTED IN BOULDER AND A  
SMALL LANDSPOUT TOUCHED DOWN NEAR BYERS. ON THE 24TH...HEAVY  
SNOW FELL IN THE FOOTHILLS WEST OF DENVER AND BOULDER...WHERE  
STORM TOTALS RANGED FROM 1 TO 2 FEET. HEAVY SNOW ALSO  
OCCURRED ALONG THE PALMER DIVIDE...WITH STORM TOTALS OF 10 TO  
16 INCHES. ELSEWHERE...A STEADY MODERATE TO HEAVY RAINFALL  
WAS REPORTED. DENVER INTERNATIONAL AIRPORT MEASURED 2.09  
INCHES OF RAINFALL...WHICH SHATTERED THE PREVIOUS 24-HR  
RECORD OF 1.29 INCHES FOR THE 24TH OF APRIL. THE HEAVY WET  
SNOW CAUSED SEVERAL POWER OUTAGES. IN SOME INSTANCES IT  
TOOK SEVERAL DAYS TO RESTORE POWER. SEVERAL ROAD CLOSURES  
WERE REPORTED...INCLUDING INTERSTATES 25 AND 70. A JACKNIFED  
SEMI-TRAILER BACKED UP TRAFFIC FOR NEARLY 20 MILES...ON  
SOUTHBOUND I-25...BETWEEN DENVER AND COLORADO SPRINGS. IN  
ADDITION...A 50-TON BOULDER BLOCKED THE SOUTHBOUND LANE OF  
STATE HIGHWAY 285...NEAR PARMALEE GULCH. CREWS HAD TO USE  
EXPLOSIVES TO BREAK UP THE BOULDER AND CLEAR THE DEBRIS.  
STRANDED BUSES AND IMPASSABLE ROADWAYS ALSO FORCED SEVERAL  
SCHOOL CLOSURES.  
23-25 IN 1935...HEAVY WET SNOW FELL ACROSS METRO DENVER. THE STORM  
STARTED AS RAIN ON THE 23RD AND CHANGED TO SNOW EARLY ON THE  
MORNING OF THE 24TH. THERE WAS CONTINUOUS PRECIPITATION FOR  
A PERIOD OF 48 HOURS. SNOWFALL TOTALED 19.0 INCHES OVER THE  
CITY AND 20.0 INCHES AT DENVER MUNICIPAL AIRPORT. HOWEVER...  
DUE TO WARM TEMPERATURES IN THE 30'S...MUCH OF THE SNOW  
MELTED AS IT FELL AND DID NOT SERIOUSLY DISRUPT TRAFFIC.  
THE GREATEST SNOW ACCUMULATION ON THE GROUND DOWNTOWN WAS  
12 INCHES...BUT IT QUICKLY MELTED. THE HIGHEST SUSTAINED  
WIND SPEED RECORDED DURING THE STORM WAS 28 MPH FROM THE  
NORTH ON THE 23RD. THE STORM CONTAINED 3.16 INCHES OF  
MOISTURE.  
24 IN 1959...WIND GUSTS TO 60 MPH RECORDED IN DOWNTOWN BOULDER  
CAUSED VERY LIMITED MINOR DAMAGE. WEST WINDS GUSTED TO  
38 MPH AT STAPLETON AIRPORT.  
IN 1986...A WIND GUST TO 60 MPH WAS CLOCKED AT GOLDEN GATE  
CANYON.  
IN 1989...1 3/4 INCH DIAMETER HAIL WAS REPORTED IN LAFAYETTE.  
BOULDER AND LOUISVILLE REPORTED 3/4 INCH HAIL.  
24-25 IN 1890...RAIN CHANGED TO SNOW AND TOTALED 7.0 INCHES IN  
DOWNTOWN DENVER.  
IN 1931...HEAVY SNOWFALL TOTALED 9.3 INCHES OVER DOWNTOWN  
DENVER. WINDS WERE LIGHT DURING THE STORM.  
IN 1996...THE SECOND WIND STORM IN LESS THAN A WEEK DEVELOPED  
EAST OF THE CONTINENTAL DIVIDE AND SPREAD OVER METRO  
DENVER. HIGH WINDS GUSTED FROM 60 TO 90 MPH. SEVERAL  
POWER LINES AND POLES WERE DOWNED. SOME OF THE STRONGER  
WIND GUSTS INCLUDED: 91 MPH ATOP SQUAW MOUNTAIN WEST OF  
DENVER...90 MPH ATOP TABLE MESA NEAR BOULDER...85 MPH IN  
GOLDEN GATE CANYON...AND 82 MPH AT WONDERVU. NORTHWEST  
WINDS GUSTED TO 41 MPH AT DENVER INTERNATIONAL AIRPORT  
ON THE 25TH.  
24-26 IN 1924...POST-FRONTAL RAIN CHANGED TO SNOW...WHICH BECAME  
HEAVY AND TOTALED 10.2 INCHES OVER DOWNTOWN DENVER. THE  
GREATEST AMOUNT OF SNOW ON THE GROUND WAS 6.0 INCHES ON THE  
25TH DUE TO MELTING. NORTH WINDS WERE SUSTAINED TO 38 MPH  
WITH GUSTS TO 42 MPH ON THE 24TH.  
25 IN 1902...NORTHEAST WINDS WERE SUSTAINED TO 42 MPH WITH GUSTS  
TO 48 MPH.  
IN 1908...NORTH WINDS WERE SUSTAINED TO 40 MPH BEHIND AN  
APPARENT COLD FRONT. SNOWFALL WAS 0.5 INCH.  
IN 1928...RAIN CHANGED TO SNOW...WHICH BECAME HEAVY AND TOTALED  
7.4 INCHES IN DOWNTOWN DENVER. DUE TO MELTING...THE MAXIMUM  
SNOW DEPTH ON THE GROUND WAS 4.0 INCHES AT 6:00 PM. THIS  
WAS THE LAST SNOW OF THE SEASON. SOUTHEAST WINDS WERE  
SUSTAINED TO 19 MPH WITH GUSTS TO 20 MPH.  
IN 1976...A SOUTH WIND GUST TO 54 MPH WAS RECORDED AT  
STAPLETON INTERNATIONAL AIRPORT. THE HIGH WINDS TOPPLED A  
70-FOOT HIGH COTTONWOOD TREE ONTO THE REAR OF HOUSE AND A  
NEIGHBORING RESIDENCE IN CENTRAL DENVER.  
IN 1989...LIGHTNING CAUSED HEAVY DAMAGE TO A RADIO TRANSMITTER  
IN PARKER...KNOCKING A DENVER AREA RADIO STATION OFF THE AIR  
FOR 3 HOURS.  
IN 1994...WEATHER SPOTTERS REPORTED DIME-SIZE HAIL AT THE  
INTERSECTION OF U.S. HIGHWAY 287 AND C470 IN JEFFERSON  
COUNTY. MARBLE-SIZE HAIL COVERED THE GROUND NEAR GOLDEN  
TO A DEPTH OF 1 INCH. PEA-SIZE HAIL WAS REPORTED COVERING  
THE GROUND TO A DEPTH OF 3 INCHES IN ARVADA.  
IN 2016...A SEVERE THUNDERSTORM PRODUCED HAIL UP TO ONE INCH  
IN DIAMETER NEAR CASTLE ROCK.  
25-26 IN 1985...A SPRING STORM BROUGHT MUCH RAIN AND SNOW TO METRO  
DENVER. THE FOOTHILLS WERE BURIED WITH 15 INCHES OF SNOW  
AT CONIFER AND 12 INCHES AT EVERGREEN. AT LOWER ELEVATIONS...  
AN INCH OR MORE OF RAIN FELL IN DENVER AND BOULDER. THE  
HEAVY PRECIPITATION CAUSED BRIEF POWER OUTAGES IN THE  
DENVER AREA. PRECIPITATION TOTALED 1.06 INCHES AT STAPLETON  
INTERNATIONAL AIRPORT...INCLUDING ONLY 0.7 INCH OF SNOWFALL.  
25-27 IN 1877...SNOW ENDED AROUND 7:00 AM ON THE MORNING OF THE 27TH...  
AFTER FALLING CONTINUOUSLY FOR 48 HOURS AND TOTALING AN  
ESTIMATED 13 INCHES IN THE CITY. THE STORM...LIKELY  
ACCOMPANIED BY STRONG WINDS...CAUSED TRAINS TO BE DELAYED  
FOR 2 TO 3 DAYS. ONE OR TWO ROOFS OF SMALL BUILDINGS WERE  
CRUSHED BY THE WEIGHT OF THE SNOW...AND MANY TREE BRANCHES  
WERE BROKEN IN THE CITY. THERE WERE A NUMBER OF REPORTS OF  
LIVESTOCK LOSSES. ONE STOCKMAN LOST 17 HORSES AND SEVERAL  
CATTLE FROM THE SNOW AND COLD. PRECIPITATION TOTALED  
1.30 INCHES FROM THE STORM.  
26 IN 1965...WHILE ONLY 0.40 INCH OF RAIN FELL AT STAPLETON  
INTERNATIONAL AIRPORT...SOME COMMUNITIES IN THE FOOTHILLS  
WEST OF DENVER REPORTED OVER 30 INCHES OF SNOW FROM THE  
STORM.  
IN 1972...A SPRING SNOW STORM ACCOMPANIED BY THUNDER DUMPED  
15.8 INCHES OF HEAVY WET SNOW ON METRO DENVER. STRONG  
NORTHWEST WINDS GUSTING TO 35 MPH PRODUCED BLOWING SNOW.  
THE STORM WAS QUITE INTENSE AND GREATLY HAMPERED TRAVEL.  
HIGH WINDS CAUSED DRIFTS 10 TO 15 FEET DEEP IN SOME AREAS...  
BLOCKING ROADS AND STRANDING HUNDREDS OF MOTORISTS. AN  
ESTIMATED 500 TO 600 PEOPLE WERE STRANDED IN THE CASTLE  
ROCK AREA. RESCUE SERVICE WAS PROVIDED BY HEAVY ARMY  
EQUIPMENT FROM FORT CARSON. POWER LINES WERE DOWNED...POWER  
POLES WERE TOPPLED...AND A NUMBER OF STEEL TOWERS CARRYING  
HIGH VOLTAGE POWER LINES WERE DOWNED. SOME AREAS NORTHEAST  
OF DENVER WERE WITHOUT POWER FOR A WEEK. A LARGE NUMBER OF  
CATTLE AND SHEEP WERE KILLED BY THE STORM. THE GREATEST  
SNOW DEPTH ON THE GROUND AT STAPLETON INTERNATIONAL AIRPORT  
WAS 12 INCHES. WARM TEMPERATURES FOLLOWING THE STORM  
QUICKLY MELTED THE SNOW.  
IN 1995...THE THIRD MAJOR SNOW STORM OF THE MONTH DUMPED HEAVY  
SNOW IN AND NEAR THE FRONT RANGE FOOTHILLS. SIX TO 12  
INCHES OF HEAVY WET SNOW FELL IN THE WESTERN METRO SUBURBS  
WITH THE HEAVIEST AMOUNTS ABOVE 6 THOUSAND FEET. BOTH  
BOULDER AND GOLDEN MEASURED 10 INCHES OF SNOW. ONLY 2.4  
INCHES OF SNOWFALL WERE MEASURED AT THE SITE OF THE FORMER  
STAPLETON INTERNATIONAL AIRPORT. NORTH WINDS GUSTED 28 MPH  
AT DENVER INTERNATIONAL AIRPORT.  
IN 1998...THE LAST IN A SERIES OF APRIL STORMS BLANKETED THE  
FOOTHILLS WITH HEAVY SNOW. SNOWFALL AMOUNTS INCLUDED: 17  
INCHES NEAR BLACKHAWK...15 INCHES AT IDAHO SPRINGS...14  
INCHES AT GEORGETOWN...11 INCHES NEAR CONIFER AND MORRISON.  
ONLY A TRACE OF SNOW FELL AT THE SITE OF THE FORMER  
STAPLETON INTERNATIONAL AIRPORT. NORTH WINDS GUSTED TO  
28 MPH AT DENVER INTERNATIONAL AIRPORT.  
26-27 IN 1906...RAIN CHANGED TO HEAVY SNOW OVERNIGHT AND TOTALED  
7.0 INCHES OVER DOWNTOWN DENVER. NORTH WINDS WERE  
SUSTAINED TO 16 MPH ON BOTH DAYS. PRECIPITATION TOTALED  
2.16 INCHES.  
IN 1932...THE TEMPERATURE REMAINED BELOW FREEZING FOR MORE  
THAN 30 CONSECUTIVE HOURS. FOR ABOUT 4 OF THOSE HOURS  
THE TEMPERATURE HOVERED AROUND 24 TO 25 DEGREES. AT THIS  
TIME SOME EARLY CHERRY TREES WERE IN BLOOM AND APPLE AND  
LILAC BLOSSOMS WERE BEGINNING TO OPEN. THE LEAVES OF  
MANY PLANTS WERE PARTLY UNFURLED AND VEGETATION IN GENERAL  
WAS CORRESPONDINGLY ADVANCED DUE TO THE WARM WEATHER FROM  
THE 11TH TO THE 22ND. HOWEVER...THERE WAS LITTLE APPARENT  
INJURY TO FOLIAGE AND BLOSSOMS...BUT SOME OF THE EARLY  
CHERRY AND APPLE BLOSSOMS WERE INJURED. RAIN CHANGED TO  
SNOW ON THE 26TH AND CONTINUED INTERMITTENTLY THROUGH THE  
27TH. SNOWFALL TOTALED ONLY 2.0 INCHES AND NORTHEAST WINDS  
GUSTED TO 22 MPH ON THE 26TH.  
IN 1964...STRONG WINDS CAUSED DAMAGE TO BUILDINGS...TREES...AND  
POWER LINES. SUSTAINED WINDS OF 37 MPH WITH GUSTS OF 50 TO  
60 MPH WERE RECORDED IN METRO DENVER. WEST-NORTHWEST WINDS  
GUSTED TO 44 MPH AT STAPLETON INTERNATIONAL AIRPORT ON THE  
26TH.  
27 IN 1955...WEST WINDS AT 43 MPH WITH GUSTS AS HIGH AS 55 MPH  
WERE RECORDED AT STAPLETON AIRPORT WHERE BLOWING DUST  
BRIEFLY REDUCED THE VISIBILITY TO 3/8 MILE.  
IN 1966...A NORTHWEST WIND GUST TO 51 MPH WAS RECORDED AT  
STAPLETON INTERNATIONAL AIRPORT.  
27-28 IN 1919...RAINFALL TOTALED 2.03 INCHES FOR THE TWO DAYS...  
ALONG WITH A TRACE OF SNOWFALL. NORTHWEST WINDS WERE  
SUSTAINED TO 24 MPH WITH GUSTS TO 26 MPH ON THE 27TH.  
IN 1975...HIGH WINDS GUSTING TO 85 MPH SEVERELY DAMAGED A  
MOBILE HOME IN BOULDER AND CAUSED OTHER MINOR DAMAGE.  
WEST WINDS GUSTED TO 46 MPH AT STAPLETON INTERNATIONAL  
AIRPORT ON THE 28TH.  
IN 1996...HEAVY SNOW FELL OVER PORTIONS OF THE FRONT RANGE  
FOOTHILLS WEST OF DENVER. SNOWFALL AMOUNTS RANGED FROM  
4 TO 7 INCHES. ONLY 0.3 INCH OF SNOW FELL AT THE SITE OF  
THE FORMER STAPLETON INTERNATIONAL AIRPORT. NORTH WINDS  
GUSTED TO 41 MPH AT DENVER INTERNATIONAL AIRPORT ON THE  
27TH.  
 

 
 
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