Public Information Statement
Issued by NWS Denver/Boulder, CO

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NOUS45 KBOU 070045
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COZ030>051-072300-

PUBLIC INFORMATION STATEMENT
NATIONAL WEATHER SERVICE DENVER/BOULDER CO
645 PM MDT SAT SEP 6 2014

...THIS WEEK IN METRO DENVER WEATHER HISTORY...

1-7   IN 1978...THE TEMPERATURE REACHED 90 DEGREES OR MORE ON SEVEN
        CONSECUTIVE DAYS WITH THE HIGHEST TEMPERATURE...94 DEGREES...
        RECORDED ON BOTH THE 4TH AND 6TH.
5-9   IN 1988...LAYERS OF SMOKE ALOFT FROM LARGE FOREST FIRES IN
        YELLOWSTONE NATIONAL PARK COMPLETELY OBLITERATED THE SUN
        AT TIMES.  AT STAPLETON INTERNATIONAL AIRPORT...SURFACE
        VISIBILITY WAS REDUCED AT TIMES TO 5 AND 6 MILES IN SMOKE.
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.
7     IN 1875...THE CREEKS WERE RUNNING DANGEROUSLY HIGH DURING
        THE NIGHT FROM HEAVY RAINS IN THE MOUNTAINS.
      IN 1885...A THUNDERSTORM PRODUCED VERY WHITE HAIL OF IRREGULAR
        SHAPE AND ABOUT THE SIZE OF BEANS.  PRECIPITATION WAS
        ONLY 0.10 INCH.
      IN 1971...A VIGOROUS COLD FRONT ACCOMPANIED BY A THUNDERSTORM
        PRODUCED WIND GUSTS TO 48 MPH AT STAPLETON INTERNATIONAL
        AIRPORT AND MUCH UPSLOPE CLOUDINESS AND LIGHT RAIN ACROSS
        METRO DENVER.
      IN 1989...WIDESPREAD THUNDERSTORMS PRODUCED LIGHTNING STRIKES
        THAT KNOCKED OUT POWER TO ABOUT 13 THOUSAND HOMES IN BOULDER
        COUNTY.  IN A RUGGED AREA STRIPPED OF VEGETATION BY A FOREST
        FIRE EARLIER IN JULY...HEAVY RAIN TRIGGERED MUD SLIDES THAT
        DESTROYED ONE HOME AND SEVERELY DAMAGED ANOTHER IN BOULDER
        CANYON 10 MILES WEST OF BOULDER.  IN ONE HOME...THE MUD
        CAVED IN AN EXTERIOR WALL AND POURED INTO THE RESIDENCE
        ONLY SECONDS AFTER 2 PEOPLE HAD EVACUATED THE PREMISES.
        RAINFALL TOTALED 1 TO 3 INCHES.  HAIL 1 3/4 INCHES IN
        DIAMETER FELL IN NEDERLAND...IDAHO SPRINGS...AND GOLDEN
        GATE CANYON.  HAIL 1 INCH IN DIAMETER WAS MEASURED 10
        MILES NORTH OF GOLDEN.
      IN 1993...THUNDERSTORM WINDS TOPPLED AN OVERHEAD SIGN ONTO
        THE INTERSECTION OF I-70 AND I-25 IN DENVER...CAUSING
        CONSIDERABLE DAMAGE TO 4 VEHICLES.  THE WINDS ALSO CAUSED
        A POLICE CAR TO BE BLOWN OFF THE ROAD NORTHEAST OF DENVER.
        THUNDERSTORM WINDS GUSTING TO 66 MPH DAMAGED THE SIDING OF
        A RESIDENCE SOUTHEAST OF BRIGHTON.  A THUNDERSTORM WIND
        GUST TO 53 MPH WAS RECORDED AT STAPLETON INTERNATIONAL
        AIRPORT.  HAIL TO 7/8 INCH IN DIAMETER FELL AT KITTREDGE
        IN THE FOOTHILLS OF JEFFERSON COUNTY.
      IN 1994...LIGHTNING SEVERELY DAMAGED A PUBLIC TELEVISION
        TRANSMITTER ATOP SQUAW MOUNTAIN WEST OF DENVER.
7-8   IN 1884...A WINDSTORM FROM MID-AFTERNOON UNTIL THE EARLY
        MORNING HOURS OF THE 8TH PRODUCED SOUTH WINDS SUSTAINED
        TO 48 MPH.  THE STRONG WINDS TOPPLED SEVERAL TREES IN
        THE CITY.
      IN 1892...THERE WAS A TRACE OF RAINFALL EACH DAY.  THIS
        TOGETHER WITH A TRACE OF RAIN ON BOTH THE 2ND AND 3RD WAS
        THE ONLY RAINFALL OF THE MONTH...MAKING THE MONTH THE DRIEST
        ON RECORD.  THE RECORD WAS EQUALED IN 1944.
8     IN 1886...THE LAST THUNDERSTORM OF THE SEASON PELTED THE
        CITY WITH HAIL THE SIZE OF BEANS AND DROPPED 0.81 INCH OF
        PRECIPITATION.
      IN 1962...THE EARLIEST FIRST FREEZE OF THE SEASON OCCURRED.
        THE TEMPERATURE DIPPED TO A LOW OF 31 DEGREES.
      IN 1973...HAIL UP TO 1 1/2 INCHES IN DIAMETER FELL NORTHEAST
        OF BOULDER.  A TORNADO WAS REPORTED BY A PILOT EAST OF
        PARKER.  NO DAMAGE WAS REPORTED.
9     IN 1933...HEAVY RAIN IN THE FOOTHILLS OVER THE CLEAR CREEK
        AND GOLDEN GATE CANYON WATERSHEDS CAUSED FLOODING IN
        GOLDEN AND DAMAGED THE ROADWAY IN GOLDEN GATE CANYON...
        WHICH RESULTED IN ITS CLOSURE.
      IN 1969...A FUNNEL CLOUD WAS SIGHTED IN SOUTHEAST DENVER.
        THERE WAS ALSO CONSIDERABLE THUNDERSTORM ACTIVITY AND
        LOCAL HEAVY RAIN ACROSS METRO DENVER.  RAINFALL TOTALED
        1.30 INCHES AT STAPLETON INTERNATIONAL AIRPORT WHERE SMALL
        HAIL ALSO FELL.
      IN 1973...HAIL FROM 3/4 INCH TO 1 3/4 INCHES IN DIAMETER FELL
        IN WESTMINSTER AND SOUTH OF BROOMFIELD.
      IN 2009...A MAN WAS CRITICALLY INJURED WHEN HE WAS STRUCK BY
        LIGHTNING WHILE RIDING HIS BICYCLE.  HE WAS NEARING A
        PARAMEDIC VAN WHEN HE WAS HIT.  HIS HEART STOPPED BUT
        PARAMEDICS QUICKLY RESPONDED AND WERE ABLE TO RESUSCITATE
        HIM.
      IN 2011...A MAN WAS STRUCK BY LIGHTNING AT THE ADAMS COUNTY
        FAIRGROUNDS.  HE WAS LEANING AGAINST A TREE WHILE WATCHING
        A CROSS COUNTRY MEET WHEN THE TREE WAS HIT.  THE LIGHTNING
        TRAVELED DOWN THE TREE AND UP THROUGH THE GROUND...USING
        HIM AS A CONDUCTOR.  THE VICTIM RECEIVED SECOND AND THIRD
        DEGREE BURNS.
9-10  IN 1933...HEAVY RAIN OVER THE CHERRY CREEK...PLUM CREEK...BIG
        DRY CREEK...AND LITTLE DRY CREEK WATERSHEDS CAUSED FLOODING
        ON THE SOUTH PLATTE RIVER IN DENVER OVERNIGHT.  NEARLY AN
        INCH OF RAIN...0.98 INCH...FELL IN THE CITY.
      IN 1944...A TRACE OF RAIN FELL ON EACH DAY.  THIS TOGETHER
        WITH A TRACE OF RAIN ON THE 4TH AND 30TH WAS THE ONLY
        PRECIPITATION FOR THE MONTH.  THE TOTAL OF A TRACE OF
        PRECIPITATION FOR THE MONTH EQUALED THE DRIEST SEPTEMBER
        ON RECORD FIRST SET IN 1892.
      IN 1994...UNUSUALLY VERY WARM WEATHER RESULTED IN THREE
        TEMPERATURE RECORDS BEING EQUALED.  HIGH TEMPERATURES
        OF 94 DEGREES ON THE 9TH AND 93 DEGREES ON THE 10TH
        EQUALED RECORD MAXIMUMS FOR THE DATES.  LOW TEMPERATURE
        OF 63 DEGREES ON THE 9TH EQUALED THE RECORD HIGH MINIMUM
        FOR THE DATE.
10    IN 1985...GOLF BALL SIZE HAIL WAS REPORTED JUST EAST OF PARKER.
      IN 1989...3/4 INCH DIAMETER HAIL FELL IN LITTLETON.  HEAVY RAIN
        PRODUCED LOCAL FLOODING IN LAKEWOOD.  THE HEAVY RAIN CAUSED
        THE WALL OF A HOUSE TO COLLAPSE.
      IN 1993...THUNDERSTORM WINDS DOWNED POWER LINES...WHICH CAUSED A
        POWER OUTAGE IN CASTLE ROCK.
11    IN 1910...WEST WINDS WERE SUSTAINED TO 42 MPH.
      IN 1951...A VIGOROUS CANADIAN COLD FRONT PRODUCED A DUST STORM
        ACROSS METRO DENVER.  NORTHEAST WIND GUSTS TO 43 MPH REDUCED
        THE VISIBILITY AT STAPLETON AIRPORT TO AS LOW AS 1 1/2 MILES
        FOR NEARLY 5 HOURS.  THE TEMPERATURE DROPPED 47 DEGREES IN
        8 HOURS...FROM A HIGH OF 92 DEGREES TO A LOW OF 45 DEGREES.
      IN 1967...A MICROBURST WIND GUST TO 52 MPH PRODUCED BLOWING
        DUST AND BRIEFLY REDUCED THE VISIBILITY TO 1/2 MILE AT
        STAPLETON INTERNATIONAL AIRPORT.
      IN 1974...A TRACE OF SNOW...THE FIRST OF THE SEASON...ENDED
        THE SHORTEST PERIOD WITHOUT SNOW...94 DAYS FROM JUNE 9TH
        THROUGH SEPTEMBER 10TH.  A TRACE OF SNOW ALSO FELL ON
        JUNE 8TH.
      IN 1995...STRONG POST-FRONTAL WINDS ASSOCIATED WITH A FAST
        MOVING PACIFIC COLD FRONT KNOCKED DOWN POWER POLES AND TREES
        AS IT MOVED THROUGH METRO DENVER.  NUMEROUS POWER OUTAGES
        AFFECTED NEARLY ONE THOUSAND PEOPLE IN DENVER AND JEFFERSON
        COUNTIES.  WEST WINDS GUSTED TO 34 MPH AT DENVER
        INTERNATIONAL AIRPORT.
11-12 IN 1974...POST-FRONTAL RAIN CHANGED TO SNOW OVERNIGHT FOR THE
        FIRST SNOW OF THE SEASON.  SNOWFALL TOTALED ONLY 1.8 INCHES
        AT STAPLETON INTERNATIONAL AIRPORT WHERE NORTH WINDS GUSTED
        TO 40 MPH ON THE 11TH.  HIGH TEMPERATURE OF ONLY 46 DEGREES
        ON THE 12TH SET A NEW RECORD LOW MAXIMUM FOR THE DATE.
12    IN 1887...WEST WINDS TO 42 MPH WERE RECORDED IN THE CITY.
      IN 1952...A THUNDERSTORM OUTFLOW PRODUCED STRONG SOUTHEAST
        WINDS GUSTING TO 52 MPH.  SURFACE VISIBILITY AT STAPLETON
        AIRPORT WAS BRIEFLY REDUCED TO 2 MILES IN BLOWING DUST.
      IN 1963...A NEARLY STATIONARY...WHITE TORNADO NEAR BENNETT WAS
        SIGHTED FROM DENVER.  NO DAMAGE WAS REPORTED.
      IN 1989...AN EARLY SNOWFALL AND THE FIRST OF THE SEASON
        BROUGHT 2 TO 3 INCHES OF SLUSH TO METRO DENVER.  MORE SNOW
        WHITENED THE FOOTHILLS WEST OF DENVER WHERE 6 INCHES WERE
        MEASURED AT EVERGREEN.  THE SNOW FELL ON LEAF LADEN TREES...
        AND SAGGING BRANCHES ONTO POWER LINES CAUSED OUTAGES.  MUCH
        OF DENVER`S SNOW FELL DURING THE EVENING RUSH HOUR...CREATING
        TRAFFIC CHAOS.  SNOWFALL TOTALED 2.3 INCHES AT STAPLETON
        INTERNATIONAL AIRPORT WHERE THE MAXIMUM SNOW DEPTH ON THE
        GROUND WAS ONLY 1 INCH DUE TO MELTING.
      IN 1994...THUNDERSTORM MICROBURST WINDS GUSTED TO 67 MPH IN
        BOULDER.  NO DAMAGE WAS REPORTED.
      IN 2002...A SEVERE THUNDERSTORM PRODUCED HAIL AS LARGE AS
        1 INCH IN DIAMETER NEAR CASTLE ROCK.
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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