Public Information Statement
Issued by NWS Denver/Boulder, CO

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NOUS45 KBOU 240045
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COZ030>051-242300-

PUBLIC INFORMATION STATEMENT
NATIONAL WEATHER SERVICE DENVER/BOULDER CO
645 PM MDT SAT AUG 23 2014

...THIS WEEK 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.
22-24 IN 1987...SOME LOCATIONS IN METRO DENVER HAD A TOTAL 3-DAY
        RAINFALL OF 2 TO 4 INCHES.  RAINFALL TOTALED 0.96 INCH
        AT STAPLETON INTERNATIONAL AIRPORT.
24    IN 1880...A THUNDERSTORM PRODUCED VIVID LIGHTNING AND HEAVY
        RAINFALL...WHICH CAUSED FLOODING OVER THE EASTERN PART OF
        THE CITY INCLUDING THE BRICK YARDS.  THERE WAS NO RAINFALL
        RECORDED IN DOWNTOWN DENVER.
      IN 1910...AN APPARENT DRY COLD FRONT CAUSED A REMARKABLE DROP
        IN TEMPERATURE.  FROM 3:00 PM UNTIL MIDNIGHT THE TEMPERATURE
        FELL FROM A HIGH OF 93 DEGREES TO A LOW OF 40 DEGREES.
        NORTHEAST WINDS WERE SUSTAINED TO 44 MPH DURING THE LATE
        AFTERNOON.
      IN 1946...HEAVY RAIN NEAR IDLEDALE CAUSED FLOODING ON BEAR
        CREEK AT MORRISON...WHICH RESULTED IN ONE DEATH WHEN A
        WOMAN WAS SWEPT FROM HER STRANDED CAR AND DROWNED.
      IN 1973...STRONG WINDS BLEW DOWN A FEW POWER LINES AND HAIL UP
        TO 3/4 INCH DIAMETER FELL IN SOUTHEAST AURORA.
      IN 1984...HEAVY RAIN HIT THE SOUTH DENVER AREA.  OVER AN INCH
        FELL IN LESS THAN AN HOUR AT BOTH CASTLE ROCK AND SEDALIA.
      IN 1992...HEAVY RAINS CAUSED FLASH FLOODING ACROSS PARTS OF
        METRO DENVER.  RAINFALL AMOUNTS OF 1 TO 3 INCHES FELL WITH
        THE HARDEST HIT AREAS BEING THE SOUTHWEST AND CENTRAL PARTS
        OF METRO DENVER.  BEAR CREEK ROSE ABOVE BANKFULL NEAR
        IDLEDALE WITH FLOOD WATERS MOVING INTO SOUTHWEST METRO
        DENVER.  MUD AND ROCK SLIDES ALONG COLORADO HIGHWAY 74 WEST
        OF MORRISON WERE REPORTED.  THE CONFLUENCE OF CHERRY CREEK
        AND THE SOUTH PLATTE RIVER IN DOWNTOWN DENVER ALSO WENT OUT
        OF ITS BANKS...FLOODING BIKE PATHS.  RAINFALL TOTALED 1.98
        INCHES AT STAPLETON INTERNATIONAL AIRPORT WHERE LIGHT TO
        MODERATE RAIN FELL MOST OF THE DAY.  HEAVY RAIN AND FOG
        BRIEFLY REDUCED THE SURFACE VISIBILITY TO 1 1/2 MILES.  THE
        TEMPERATURE CLIMBED TO A HIGH OF ONLY 58 DEGREES...WHICH WAS
        A RECORD LOW MAXIMUM FOR THE DATE.
      IN 2002...HAIL TO 7/8 INCH IN DIAMETER WAS MEASURED IN
        SOUTHWEST DENVER.
      IN 2008...SEVERAL LANDSPOUT TORNADOES DEVELOPED ALONG A BOUNDARY
        TO THE SOUTHEAST OF THE DENVER METROPOLITAN AREA DURING THE
        DEMOCRATIC NATIONAL CONVENTION.  IN NORTHWEST ELBERT COUNTY...
        MINOR DAMAGE WAS REPORTED.  THE DAMAGE CONSISTED OF DOWNED
        POWER LINES...BROKEN WINDOWS AND AN OUT BUILDING.  SEVERE
        THUNDERSTORMS ALSO PRODUCED VERY HEAVY RAIN AND LARGE HAIL...
        UP TO ONE INCH IN DIAMETER.  IN SOUTHWEST DOUGLAS COUNTY...
        HEAVY RAIN CAUSED FLASH FLOODING NEAR THE TOWN OF WESTCREEK.
        A MUDSLIDE CLOSED STATE HIGHWAY 67.  THE ROAD IN THE YMCA CAMP
        SHADY BROOK WAS ALSO WASHED OUT AND SOME BRIDGES WERE DAMAGED.
24-26 IN 1910...THE LOWEST TEMPERATURE EVER RECORDED IN AUGUST...40
        DEGREES...OCCURRED ON EACH OF THESE DAYS AND ON AUGUST 22...
        1904.  THE UNUSUALLY COLD WEATHER FOR SO EARLY IN THE
        SEASON BROUGHT SUB-FREEZING MINIMUM TEMPERATURES TO MUCH
        OF THE COLORADO NORTHEASTERN PLAINS.
25    IN 1951...A MICROBURST PRODUCED A SOUTHWEST WIND GUST TO 50
        MPH AT STAPLETON AIRPORT.  ONLY A TRACE OF RAIN WAS
        OBSERVED.
      IN 1964...THUNDERSTORM WINDS GUSTED TO 59 MPH AND CAUSED
        SOME BLOWING DUST AT STAPLETON INTERNATIONAL AIRPORT.
      IN 1994...LIGHTNING STRUCK A POWER POLE IN LOUISVILLE AND
        CAUSED A TWO-HOUR POWER OUTAGE.
      IN 2008...AN UNOCCUPIED HOME WAS STRUCK BY LIGHTNING IN AURORA...
        CAUSING 75 THOUSAND DOLLARS IN DAMAGE TO THE ROOF.
26    IN 1944...ONE OF THE MOST DESTRUCTIVE HAILSTORMS IN THE CITY
        IN A DECADE CAUSED DAMAGE ESTIMATED AT NEARLY ONE MILLION
        DOLLARS.  THE STORM OCCURRED WITHIN A PERIOD OF 10 TO 30
        MINUTES...BETWEEN 2:00 PM AND 3:00 PM.  THE HAIL VARIED IN
        SIZE FROM VERY SMALL TO AS LARGE AS 1 1/2 INCHES IN
        DIAMETER.  HAIL COVERED THE GROUND TO A DEPTH OF 5 TO 6
        INCHES IN SOME SECTIONS OF THE CITY.  SEVERAL PEOPLE WERE
        CUT BY BROKEN GLASS.  THE HAIL AND HEAVY RAIN FLOODED
        UNDERPASSES TO A DEPTH OF 6 FEET...AND THE OCCUPANTS OF
        STALLED AUTOS HAD TO BE RESCUED.  SEWERS WERE UNABLE TO
        HANDLE THE SUDDEN AMOUNT OF WATER AND WATER BACKED UP
        AND FLOODED A NUMBER OF BASEMENTS.  A FEW FIRST FLOORS OF
        BUILDINGS WERE FLOODED.  THE WATER DEPARTMENT HAD A BUSY
        TIME REPLACING MANHOLE COVERS THAT HAD BEEN DISPLACED BY
        THE WATER PRESSURE.  TREES WERE STRIPPED...ONE WAS SEVERELY
        BROKEN...AND TELEPHONE LINES WERE DOWNED.  ROOFS...WINDOWS...
        AUTOMOBILES...AWNINGS...AND GARDENS WERE SEVERELY DAMAGED.
        FLOWERS AND GARDENS IN SOME SECTIONS OF THE CITY WERE A
        TOTAL LOSS.  GREENHOUSES WERE EXTENSIVELY BROKEN WITH AN
        ESTIMATED 20 CARLOADS OF GLASS SHATTERED.  VEGETABLE AND
        TRUCK CROPS IN AND AROUND THE CITY WERE SEVERELY SHREDDED.
        THE NEXT DAY THE AMERICAN RED CROSS WAS DESIGNATED BY THE
        WAR AGENCY TO GRANT ANY AND ALL PRIORITIES NEEDED TO OBTAIN
        MATERIALS AND SUPPLIES TO REPLACE AND REPAIR THE DAMAGE.
        IN DOWNTOWN DENVER...THE THUNDERSTORM PRODUCED 0.95 INCH OF
        RAIN AND HEAVY HAIL ALONG WITH SUSTAINED NORTHWEST WINDS TO
        25 MPH.
      IN 1961...STRONG WINDS BLEW IN THE WALLS OF A WAREHOUSE UNDER
        CONSTRUCTION IN DENVER.  TWO WORKMEN SUFFERED A FRACTURED
        FOOT AND BODY BRUISES.
26-27 IN 1980...TWO HEAVY THUNDERSTORMS HIT ARVADA AND WESTMINSTER...
        DUMPING UP TO 1.50 INCHES OF RAIN IN LESS THAN AN HOUR.
        AT LEAST TWO STREETS WERE WASHED OUT AND A NUMBER OF HOMES
        AND CARS WERE DAMAGED WHEN A CREEK FLOODED.  THREE HOMES
        IN ARVADA SUSTAINED MINOR LIGHTNING DAMAGE.
27    IN 1910...A THUNDERSTORM PRODUCED SOUTH WINDS SUSTAINED TO 40
        MPH.
      IN 1961...STRONG THUNDERSTORM WINDS AND HEAVY RAIN OCCURRED AT
        79TH AND FEDERAL BLVD. IN WESTMINSTER.  THE STRONG WINDS
        BLEW THE ROOFS OFF LUMBER SHEDS ONTO PARKED CARS.
      IN 1967...A YOUNG WOMAN WAS KILLED BY LIGHTNING WHILE
        HORSEBACK RIDING IN THE SUBURBS JUST WEST OF DENVER.  HER
        HORSE DIED SEVERAL HOURS AFTER THE INCIDENT.  A YOUNG MAN
        AND ANOTHER YOUNG WOMAN WERE ALSO KNOCKED FROM THEIR HORSES
        BY THE IMPACT OF THE LIGHTNING AND REQUIRED HOSPITALIZATION.
      IN 1991...HEAVY THUNDERSTORM RAINFALL TOTALED 0.91 INCH AT
        STAPLETON INTERNATIONAL AIRPORT...WHERE 1/4 INCH DIAMETER
        HAIL WAS MEASURED.
      IN 1996...LOCALIZED STREET FLOODING OCCURRED IN THE FORT
        LUPTON AREA WHEN 2 TO 3 INCHES OF RAIN FELL IN 45 MINUTES.
        THE ROOF OF A COMMUNITY COLLEGE BEGAN LEAKING...WHICH CAUSED
        DAMAGE TO CEILING TILES.  THE ROOF WAS UNDER REPAIR FROM
        HAIL DAMAGE WHICH HAD OCCURRED EARLIER IN THE SUMMER.  A
        WEAK TORNADO (F0) WAS SIGHTED NEAR FORT LUPTON.  NO DAMAGE
        WAS REPORTED.
      IN 1999...A SLOW MOVING THUNDERSTORM DUMPED 5 INCHES OF RAIN
        IN 2 HOURS NEAR DACONO.  A SEVERE THUNDERSTORM PRODUCED
        3/4 INCH DIAMETER HAIL IN CASTLE ROCK.
      IN 2002...SEVERE THUNDERSTORMS SPREAD LARGE HAIL OVER METRO
        DENVER.  HAIL AS LARGE AS 2 INCHES IN DIAMETER FELL IN
        JEFFERSON COUNTY 5 TO 11 MILES NORTHWEST OF GOLDEN.  OTHER
        LARGE HAIL REPORTS INCLUDED:  1 1/2 INCHES NEAR GOLDEN AND
        IN LAKEWOOD; 1 1/4 INCHES IN NEDERLAND; 1 INCH HAIL NEAR
        ELIZABETH...LOUVIERS...ROLLINSVILLE...AND BLACKHAWK; 7/8 INCH
        HAIL NEAR ACEQUIA IN DOUGLAS COUNTY.  A THUNDERSTORM
        PRODUCED A TRACE OF RAIN AND A MICROBURST WIND GUST TO
        52 MPH AT DENVER INTERNATIONAL AIRPORT.
      IN 2003...LIGHTNING STRUCK A HOUSE AND SPARKED A FIRE IN
        ARVADA.  DAMAGE TO THE ROOF AND CEILING WAS EXTENSIVE.
      IN 2005...LIGHTNING STRUCK AN UNOCCUPIED HOME IN PARKER.
        THE RESULTING FIRE DAMAGED THE ROOF...ATTIC...AND SECOND
        FLOOR BEDROOM.  DAMAGE WAS ESTIMATED AT 15 THOUSAND
        DOLLARS.
27-28 IN 2004...A BRIEF CHILLY SPELL RESULTED IN THREE TEMPERATURE
        RECORDS.  THE HIGH TEMPERATURE OF 55 DEGREES ON THE 27TH
        WAS A RECORD LOW MAXIMUM FOR THE DATE.  THE LOW TEMPERATURE
        OF 48 DEGREES ON THE 27TH EQUALED THE RECORD MINIMUM FOR
        THE DATE.  THE LOW TEMPERATURE OF 42 DEGREES ON THE 28TH
        WAS A RECORD MINIMUM FOR THE DATE.
28    IN 1887...A DRY THUNDERSTORM PRODUCED NORTH WINDS TO 48 MPH
        BUT ONLY A TRACE OF RAINFALL.
      IN 1968...ONE MAN WAS SERIOUSLY INJURED BY LIGHTNING WHILE
        RIDING ON A ROLLER COASTER AT A DENVER AMUSEMENT PARK.  AN
        AIRLINE EMPLOYEE WAS INJURED WHEN LIGHTNING STRUCK A
        JETLINER HE WAS SERVICING AT STAPLETON INTERNATIONAL
        AIRPORT.  A LIGHTNING-CAUSED FIRE DID EXTENSIVE DAMAGE TO
        ONE HOUSE AND MINOR DAMAGE TO SEVERAL OTHERS IN THE CITY OF
        DENVER.
      IN 1970...A MICROBURST WIND GUST TO 53 MPH WAS RECORDED AT
        STAPLETON INTERNATIONAL AIRPORT.
      IN 2002...A SEVERE THUNDERSTORM PRODUCED 3/4 INCH DIAMETER
        HAIL NEAR PARKER.
      IN 2005...LIGHTNING SPARKED A SMALL FIRE NEAR JAMESTOWN.  THE
        BLAZE WAS QUICKLY CONTAINED AND CONSUMED LESS THAN AN ACRE.
29    IN 1876...AFTER THE PASSAGE OF A GENTLE RAIN SHOWER TO THE EAST
        DURING THE LATE EVENING HOURS...THE MOON SHONE BRIGHTLY AND
        A REMARKABLY BRIGHT LUNAR RAINBOW APPEARED.
      IN 1910...AN APPARENT COLD FRONT PRODUCED SUSTAINED NORTHEAST
        WINDS TO 40 MPH.
      IN 1946...THE HIGH TEMPERATURE WARMED TO ONLY 55 DEGREES...THE
        RECORD LOW MAXIMUM FOR THE MONTH.
      IN 1989...A SPECTACULAR LIGHTNING DISPLAY KNOCKED OUT POWER TO
        300 BLOCKS IN SOUTHEAST DENVER.  ONE BOLT STARTED A FIRE IN
        A LUMBER YARD IN THE NORTHEAST PART OF THE CITY...AND THE
        ATTIC OF A HOME IN THE SAME AREA WAS SET ABLAZE BY A
        LIGHTNING BOLT.
      IN 1996...3/4 INCH DIAMETER HAIL WAS MEASURED IN PARKER.
      IN 2000...LIGHTNING STRUCK TWO HOMES IN THORNTON.  THE EXTENT
        OF DAMAGE WAS UNKNOWN.
      IN 2002...TWO SMALL TORNADOES CAUSED DAMAGE IN SOUTHEAST METRO
        DENVER.  THE FIRST TORNADO...ASSOCIATED WITH A MULTI-VORTEX
        STORM...TOUCHED DOWN BRIEFLY NEAR E-470 AND SOUTH JORDAN
        ROAD.  SOME FENCES WERE DAMAGED...AND A FEW TREES WERE BLOWN
        DOWN.  A FEW OF THE HOMES ALSO SUSTAINED MINOR ROOF DAMAGE.
        DAMAGE FROM THIS STORM TOTALED 100 THOUSAND DOLLARS.  THE
        SECOND TORNADO ASSOCIATED WITH THE STORM TOUCHED DOWN IN A
        SUBDIVISION THAT WAS UNDER CONSTRUCTION AT GARTRELL AND
        ARAPAHOE ROADS.  FOUR LARGE CONDOMINIUMS UNDER CONSTRUCTION
        WERE DESTROYED.  THE MOST HEAVILY DAMAGED PORTIONS OF THE
        STRUCTURES WERE STILL IN THE FRAMING STAGES.  ADJACENT
        SECTIONS WHERE ENCLOSED WALLS WERE IN PLACE WERE NOT
        DESTROYED.  A MAN SUFFERED 4 BROKEN RIBS AND SEVERAL CUTS
        AND BRUISES WHEN THE TRAILER HE SOUGHT SHELTER IN WAS
        FLIPPED THREE TIMES AND TORN APART BY THE TWISTER.  DAMAGE
        FROM THIS STORM TOTALED 6 MILLION DOLLARS.
        A SEVERE THUNDERSTORM PRODUCED 1 INCH DIAMETER HAIL NEAR
        EVERGREEN.
      IN 2006...SEVERE THUNDERSTORMS PRODUCED LARGE HAIL IN THE
        FOOTHILLS WEST OF DENVER.  HAIL TO 1 INCH IN DIAMETER FELL
        NEAR BLACKHAWK.  HAIL AS LARGE AS 7/8 INCH WAS MEASURED
        NEAR IDAHO SPRINGS...ALONG WITH 3/4 INCH HAIL NEAR NEDERLAND
        AND CONIFER.
30    IN 1981...60 MPH WINDS WERE REPORTED IN BOULDER.
      IN 2004...A SEVERE THUNDERSTORM PRODUCED HAIL AS LARGE AS
        1 INCH IN DIAMETER IN SOUTH AURORA NEAR CHERRY CREEK.

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