Public Information Statement
Issued by NWS Denver/Boulder, CO

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NOUS45 KBOU 130859
PNSBOU
COZ030>051-132300-

PUBLIC INFORMATION STATEMENT
NATIONAL WEATHER SERVICE DENVER/BOULDER CO
259 AM MDT SAT SEP 13 2014

...TODAY IN METRO DENVER WEATHER HISTORY...

5-13  IN 2010...THE FOURMILE CANYON WILDFIRE...NORTHWEST OF BOULDER...
        BROKE OUT ON THE MORNING OF THE 5TH.  IT ORIGINATED FROM
        AN UNATTENDED FIRE PIT AT A LOCAL RESIDENCE. THE WILDFIRE
        QUICKLY CONSUMED 5 1/2 SQUARE MILES OR 3500 ACRES THE
        FIRST DAY...AND FORCED THE EVACUATION OF OVER THREE
        THOUSAND RESIDENTS.  ERRATIC 45-MPH GUSTS SENT THE FIRE IN
        TWO DIRECTIONS AT TIMES. VERY DRY WEATHER CONDITIONS
        PRECEDED THE FIRE. THE COMBINATION OF STRONG WINDS...LOW
        RELATIVE HUMIDITIES AND DRY FUELS ALLOWED THE WILDFIRE
        SPREAD RAPIDLY THROUGH THE STEEP...HEAVILY FORESTED TERRAIN.
        THE FLAMES WERE REPORTEDLY 20 TO 50 FEET IN LENGTH.  TOWNS
        WITHIN THE BURN AREA INCLUDED SALINA...WALLSTREET AND GOLD
        HILL. THE DRY CONDITIONS COUPLED WITH GUSTY WINDS RANGING
        FROM 45 TO 64 MPH PERSISTED FOR SEVERAL MORE DAYS. FIRE
        MANAGERS USED AS MANY AS 700 FIREFIGHTERS AND SUPPORT
        PERSONNEL FROM 35 AGENCIES AND SEVEN AIR TANKERS TO BATTLE
        THE WILDFIRE.  A TOTAL OF 6181 SQUARE ACRES OR
        APPROXIMATELY 10 SQUARE MILES WERE BURNED.  THE FOURMILE
        CANYON WILDFIRE WAS THE MOST DESTRUCTIVE FIRE IN COLORADO
        HISTORY IN TERMS OF THE DAMAGE TO PERSONAL PROPERTY.  IT
        DESTROYED 171 HOMES WITH AN ESTIMATED COST OF 217 MILLION
        DOLLARS.
13    IN 1899...WEST WINDS WERE SUSTAINED TO 43 MPH WITH GUSTS TO
        46 MPH.
      IN 1928...NORTHWEST WINDS WERE SUSTAINED TO 41 MPH WITH GUSTS
        TO 45 MPH.
      IN 1937...AN APPARENT DRY MICROBURST PRODUCED BRIEF NORTH WINDS
        SUSTAINED TO 31 MPH WITH GUSTS TO 41 MPH.  THERE WAS A TRACE
        OF RAIN.
      IN 1982...TORRENTIAL RAINS DRENCHED BOTH THE FOOTHILLS AND
        PLAINS FROM DENVER NORTH.  WHILE THE HEAVIEST RAIN OCCURRED
        NORTH OF DENVER...JUST EAST OF DENVER 2 1/3 INCHES OF RAIN
        FELL IN 5 HOURS ALONG WITH HAIL THAT CAUSED MINOR DAMAGE TO
        A FEW AIRPLANES.  THUNDERSTORM RAINFALL TOTALED 0.83 INCH
        AT STAPLETON INTERNATIONAL AIRPORT.
      IN 1993...AN UPPER LEVEL SYSTEM COMBINED WITH A COLD AND MOIST
        UPSLOPE FLOW TO BRING THE HEAVIEST SNOWFALL TO METRO DENVER
        FOR SO EARLY IN THE SEASON.  SNOWFALL FROM THE STORM TOTALED
        5.4 INCHES AT STAPLETON INTERNATIONAL AIRPORT; HOWEVER...MOST
        OF THE SNOW MELTED AS IT FELL LEAVING A MAXIMUM OF ONE INCH
        ON THE GROUND AT ANY ONE TIME.  NORTH WINDS GUSTED TO 21 MPH
        AT STAPLETON INTERNATIONAL AIRPORT WHERE A RECORD LOW
        TEMPERATURE OF 33 DEGREES FOR THE DATE WAS OBSERVED.
      IN 2002...FRIDAY THE 13TH PROVED TO BE BAD LUCK FOR SEVERAL
        MOTORISTS WHEN HEAVY THUNDERSTORM RAINFALL CAUSED FLOODING
        ON I-25 IN CENTRAL DENVER.  WATER ROSE SEVERAL FEET UNDER
        THE LOGAN STREET OVERPASS...INUNDATING SEVERAL VEHICLES.
        SOME MOTORISTS WERE RESCUED...WHILE OTHERS SIMPLY WAITED ATOP
        THEIR CARS FOR THE FLOOD WATER TO RECEDE.  THE HIGHWAY HAD
        TO BE CLOSED IN BOTH DIRECTIONS FOR ABOUT 3 HOURS.  THE
        FLOODING WAS EXACERBATED BY POOR DRAINAGE DUE TO THE
        CONSTRUCTION ALONG THE HIGHWAY.  A 12-FOOT DRAINAGE PIPE
        HAD NOT YET BEEN INSTALLED BENEATH THE UNDERPASS.  THE
        DELUGE ALSO FLOODED SEVERAL BUSINESSES ALONG BROADWAY.
      IN 2009...A SEVERE THUNDERSTORM PRODUCED LARGE HAIL...UP TO
        HALF DOLLAR SIZE IN THE FOOTHILLS OF JEFFERSON COUNTY...
        WEST OF DENVER.

$$



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