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Colorado, Central and South Weld County

Flash Flood Watch

Statement as of 10:23 PM MDT on July 29, 2014

Expires 8:00 PM EDT on July 30, 2014


... Flash Flood Watch remains in effect through Wednesday
afternoon...

The Flash Flood Watch continues for

* portions of central Colorado... east central Colorado... north
central Colorado and northeast Colorado... including the
following areas... in central Colorado... central and Southeast
Park County... Jefferson and west Douglas counties above 6000
feet/Gilpin/Clear Creek/Northeast Park counties below 9000
feet and south and southeast grand/west central and southwest
Boulder/Gilpin/Clear Creek/Summit/north and West Park counties
above 9000 feet. In east central Colorado... north and
northeast Elbert County below 6000 feet/North Lincoln County
and southeast Elbert County below 6000 feet/South Lincoln
County. In north central Colorado... Larimer County below 6000
feet/northwest Weld County... Larimer and Boulder counties
between 6000 and 9000 feet and south and East
Jackson/Larimer/north and northeast grand/northwest Boulder
counties above 9000 feet. In northeast Colorado... Boulder and
Jefferson counties below 6000 feet/west Broomfield County...
central and East Adams and Arapahoe counties... central and
south Weld County... Elbert/central and East Douglas counties
above 6000 feet... Morgan County... north Douglas County below
6000 feet/Denver/west Adams and Arapahoe counties/east
Broomfield County... northeast Weld County and Washington
County.

* Through Wednesday afternoon

* widespread showers and a few thunderstorms may produce
additional rain amounts from one half inch to one inch
overnight. Another round of showers and a few thunderstorms is
expected on Wednesday which may lead to some additonal heavy
rainfall.

* Flash flooding of low lying areas... creeks and streams may occur
in a few locations again on Wednesday. Rock and mud slides will
be possible in the foothills. If you live in flood prone areas
or will be traveling... stay alert to the latest warnings and be
prepared for rapidly rising water levels.

Precautionary/preparedness actions...

A Flash Flood Watch means that conditions may develop that lead
to flash flooding. Flash flooding is a very dangerous situation.
Be prepared to evacuate low lying areas and move to higher ground
should flooding develop or a warning be issued. Be aware of the
flooding danger today... stay out of flooded areas and do not
drive on flooded roads.






Local Storm Report



07/29/2014 0415 PM

2 miles NW of Greeley, Weld County.

Flash flood, reported by law enforcement.


            Street flooding on o street west of CR 33.




07/29/2014 0345 PM

Windsor, Weld County.

Flash flood, reported by law enforcement.


            Extensive street flooding in Windsor with stalled cars.
            Law enforcement calling for barricades.




07/29/2014 0415 PM

2 miles NW of Greeley, Weld County.

Flash flood, reported by law enforcement.


            Street flooding on o street west of CR 33.




07/29/2014 0345 PM

Windsor, Weld County.

Flash flood, reported by law enforcement.


            Extensive street flooding in Windsor with stalled cars.
            Law enforcement calling for barricades.




07/29/2014 0415 PM

2 miles NW of Greeley, Weld County.

Flash flood, reported by law enforcement.


            Street flooding on o street west of CR 33.




07/29/2014 0345 PM

Windsor, Weld County.

Flash flood, reported by amateur radio.


            Extensive street flooding in Windsor with stalled cars.
            Law enforcement calling for barricades.




07/29/2014 0415 PM

2 miles NW of Greeley, Weld County.

Flash flood, reported by law enforcement.


            Street flooding on o street west of CR 33.




07/29/2014 0345 PM

Windsor, Weld County.

Flash flood, reported by amateur radio.


            Extensive street flooding in Windsor with stalled cars.
            Law enforcement calling for barricades.




07/28/2014 0353 PM

2 miles S of Fort Lupton, Weld County.

Tornado, reported by official NWS obs.


            Correction to location. Touchdown was north of Weld
            County line in Weld County. Brief touchdown with no
            damage reported. Noted as a touchdown by dia observer at
            2153z obs.





07/28/2014 0353 PM

2 miles S of Fort Lupton, Weld County.

Tornado, reported by official NWS obs.


            Correction to location. Touchdown was north of Weld
            County line in Weld County. Brief touchdown with no
            damage reported. Noted as a touchdown by dia observer at
            2353z obs.





07/28/2014 0353 PM

2 miles S of Fort Lupton, Weld County.

Tornado, reported by official NWS obs.


            Correction to location. Touchdown was north of Weld
            County line in Weld County. Brief touchdown with no
            damage reported. Noted as a touchdown by dia observer at
            2353z obs.



Public Information Statement

Statement as of 2:59 AM MDT on July 30, 2014


... Today in Metro Denver weather history...

13-5 in 2008... a streak of 24 consecutive days of 90 degrees
        shattered the previous record of 18 consecutive days
        established in 1901 and 1874. Ironically... no new single
        day record high temperatures were set in the month of July.
        In August however... a record of 104 degrees was set on the
        1st... and another record of 103 degrees was set on the 2nd.
        In addition... a record low min of 70 degrees was set on
        August 2nd.
18-2 in 1987... a streak of 16 consecutive days of 90 degrees
        ranked 4th on the list of hot streaks. The record of
        24 consecutive days was established in the Summer of
        2008.
27-31 in 1956... 96 percent of the total precipitation for the month
        of July occurred over the last five days of the month.
        Heavy thunderstorms produced 4.00 inches of rainfall at
        Stapleton Airport. This amount of precipitation in 5 days
        or less had been exceeded only 3 times in previous record.
        The last time had been in December of 1913 as snow.
        Considerable property damage occurred across Metro Denver
        from flooding.
28-30 in 1889... dense smoke from Forest fires in the mountains
        obscured the sun over the city for three days.
      In 1971... a vigorous cold front late on the 28th produced
        northeast wind gusts to 39 mph and record breaking cold
        temperatures on the 29th and 30th. The temperature dipped
        to 47 degrees on the 29th and 43 degrees on the 30th...
        setting record minimums for the dates. Upslope cloudiness
        along with rain and fog early on the 29th helped set a
        record low maximum temperature of 58 degrees for the date.
29-30 in 1997... heavy rain caused flooding and flash flooding in
        central portions of Adams and Arapahoe counties. Two
        homes were extensively damaged when water flooded the
        basements and adjacent pasture area in Strasburg. Water
        4 to 5 feet deep had pooled in the lower lying areas of
        the town. A portion of Quincy Road was closed in Arapahoe
        County when 4 feet of water covered the roadway.
        Rainfall totaled 3.06 inches at Denver International
        Airport... establishing a new record for 24-hour rainfall
        in July. The previous record was 2.42 inches set in 1965
        on the 24th and 25th.
30 in 1879... lightning struck a brick Kiln in north Denver.
        Three men were knocked senseless... but all recovered.
        Rainfall in the city was only 0.09 inch.
      In 1881... a thunderstorm dumped heavy rain and hail on the
        city... causing street flooding and much damage. A heavy
        torrent of rain fell with 1.10 inches measured in just
        20 minutes. Storm total rainfall was 1.60 inches. The
        rain turned streets into running streams. Wood street
        crossings were torn up and washed away. The storm caused
        great damage by flooding many cellars where goods were
        stored. The brick yards suffered severe damage when
        the heavy rainfall destroyed many unfired bricks.
      In 1913... northeast winds were sustained to 41 mph with gusts
        to 48 mph.
      In 1939... a thunderstorm produced 0.08 inch of rainfall. This
        was the only measurable precipitation of the month... making
        the month the second driest July on record.
      In 1961... heavy rain and lightning disrupted power lines and
        caused flooding in Denver. Thunderstorm rains totaled 1.60
        inches at 11th and Lincoln in central Denver.
      In 1972... the temperature climbed to a high of 100 degrees at
         Stapleton International Airport.
      In 1983... hail 3/4 to 1 inch in diameter fell in central and
        southeast Denver and in Littleton. Rainfall of 1.50 inches
        occurred in just 30 minutes in Littleton. There was some
        street flooding in both cities with wind gusts up to 55
        mph.
      In 1984... central Aurora was hit by a downpour that produced
        1.80 inches of rain and sent water 2 to 3 feet deep into
        some streets. Before the rain stopped later in the evening...
        the storm had dropped as much as 2.80 inches of moisture on
        the city. Thunderstorm rainfall totaled only 0.82 inch at
        Stapleton International Airport.
      In 1985... a tornado was spotted in open country 10 miles
        southwest of Bennett. No damage was reported. One inch
        hail was reported in South Lakewood.
      In 1997... one man was killed and his girlfriend critically
        injured when they were struck by lightning on the Kennedy
        Golf course in southeast Denver. Both were struck in the
        head when they took Refuge under a tree during a downpour.
        Lightning struck a home in unincorporated Arapahoe County
        east of Buckley field. The fire started in the electrical
        panel boxes... causing extensive damage to the home. Heavy
        rain and hail triggered a flash flood in Boulder... which
        sent water through a window of the financial aid office
        on the University of Colorado Campus. In addition... ceiling
        tiles... carpets... and dressing rooms were damaged at the coors
        events center when a pipe draining rainwater broke during
        the downpour. In all... 10 buildings on the Campus received
        water damage estimated at 100 thousand dollars. Hail as
        large as 1.25 inches in diameter accompanied the heavy
        rain in Boulder. Thunderstorm rainfall totaled 2.71 inches
        at Denver International Airport where west winds gusted
        to 41 mph. This was the greatest calendar day official
        precipitation ever recorded in July.
      In 1998... heavy rain... up to 3 inches in an hour... caused flash
        flooding problems from Castle Rock to Parker. I-25 north
        of Castle Rock was closed as high waters covered sections
        of the Highway. Some cars were left floating in the flood
        waters.
      In 2001... a severe thunderstorm produced a wind gust to 70
        mph at a wind sensor on the northeast corner of Denver
        International Airport.
      In 2004... a severe thunderstorm produced wind gusts to 71 mph
        in Evergreen.
      In 2005... the temperature climbed to a high of 101 degrees
        at Denver International Airport. This was a new record
        maximum temperature for the date. In addition... this was
        the 7th day of the month with a high temperature of 100
        degrees or more... which set a new Denver record for the most
        100 degree days in a month... for a season... and in a year.


Weather Severe Map
Alabama - Record Report
Arizona - Excessive Heat Warning , Special Statement , Record Report
Arkansas - Flood Warning , Flash Flood Watch , Record Report
American Samoa - Flash Flood Watch
California - Flash Flood Watch , Excessive Heat Warning , Fire Weather Watch, Fire Weather Warning , Special Statement , Record Report
Colorado - Areal Flood Warning , Flash Flood Watch , Public Information Statement
Connecticut - Record Report
District of Columbia - Record Report
Florida - Flood Warning
Georgia - Record Report
Guam - Flash Flood Watch , High Surf Advisory, Flash Flood Watch
Idaho - Fire Weather Warning , Record Report
Illinois - Record Report
Indiana - Record Report , Public Information Statement
Iowa - Public Information Statement
Kansas - Areal Flood Warning , Flash Flood Watch , Record Report , Public Information Statement
Kentucky - Record Report
Maryland - Record Report
Massachusetts - Record Report
Michigan - Special Statement
Minnesota - Record Report , Public Information Statement
Mississippi - Record Report
Missouri - Record Report
Montana - Dense Fog Advisory
Nevada - Flash Flood Watch
New Mexico - Flood Warning , Flash Flood Watch , Flash Flood Watch, Areal Flood Advisory
New York - Record Report
North Carolina - Record Report , Public Information Statement
North Dakota - Flood Warning , Dense Fog Advisory
Ohio - Record Report
Oklahoma - Flash Flood Watch
Oregon - Heat Advisory , Fire Weather Watch, Fire Weather Warning , Fire Weather Warning, Fire Weather Watch , Fire Weather Watch , Record Report
Pennsylvania - Record Report
South Dakota - Record Report
Tennessee - Record Report
Texas - Flash Flood Watch , Record Report
Utah - Record Report
Vermont - Record Report
Virginia - Record Report
Washington - Heat Advisory , Fire Weather Watch , Record Report
West Virginia - Record Report
Wisconsin - Special Statement , Public Information Statement
Wyoming - Areal Flood Advisory , Record Report