

154 

WGUS75 KBOU 122248

FFSBOU



FLASH FLOOD STATEMENT

NATIONAL WEATHER SERVICE DENVER CO

448 PM MDT THU SEP 12 2013



COC013-059-130130-

/O.CON.KBOU.FF.W.0058.000000T0000Z-130913T0130Z/

/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

JEFFERSON CO-BOULDER CO-

448 PM MDT THU SEP 12 2013



...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 730 PM MDT FOR

NORTHWESTERN JEFFERSON AND BOULDER COUNTIES...



AT 444 PM MDT...DOPPLER RADAR AND AUTOMATED RAIN GAUGES INDICATED 

THAT MODERATE RAIN HAS CONTINUED OVER NORTHERN JEFFERSON AND 

SOUTHEAST BOULDER COUNTIES FOR THE PAST HOUR AND A HALF. UP TO ONE 

AND A HALF INCHES OF RAIN HAS FALLEN SINCE 330 PM. FLASH FLOODING 

WILL CONTINUE INTO THE EARLY EVENING. 



EXCESSIVE RAINFALL OVER THE BURN SCAR WILL RESULT IN DEBRIS FLOW 

MOVING THROUGH THE FOUR MILE DRAINAGE. THE DEBRIS FLOW CAN CONSIST 

OF ROCK...MUD...VEGETATION AND OTHER LOOSE MATERIALS.



FLOODING ALONG LEYDEN CREEK...IN WESTERN ARVADA...IS ALSO EXPECTED.  

ADDITIONAL RISES ON THE SOUTH BOULDER CREEK CAN ALSO BE EXPECTED. 



SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...

NORTHWESTERN ARVADA...WESTERN WESTMINSTER...BOULDER...WESTERN

LONGMONT...SOUTHWESTERN BROOMFIELD...LAFAYETTE...LOUISVILLE...

SUPERIOR...LYONS...JAMESTOWN...SALINA...ELDORADO SPRINGS...CRISMAN...

GOLD HILL...NIWOT...SUMMERVILLE...WALLSTREET...ROCKY FLATS...

RAYMOND...SUNSHINE...WHITE RANCH OPEN SPACE AND ALLENSPARK.



PRECAUTIONARY/PREPAREDNESS ACTIONS...



EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL 

CREEKS AND STREAMS...URBAN AREAS...HIGHWAYS...STREETS AND 

UNDERPASSES AS WELL AS OTHER DRAINAGE AREAS AND LOW LYING SPOTS.



EXCESSIVE RUNOFF FROM THIS STORM WILL CAUSE FLASH FLOODING OF CREEKS

AND STREAMS...ROADS AND ROADSIDE CULVERTS.  THE HEAVY RAINS COULD

ALSO TRIGGER ROCK SLIDES OR DEBRIS FLOWS IN STEEP TERRAIN.



TURN AROUND...DONT DROWN WHEN ENCOUNTERING FLOODED ROADS. MOST FLOOD

DEATHS OCCUR IN VEHICLES.



&&



LAT...LON 4026 10518 4008 10509 3993 10515 3990 10514

      3991 10516 3988 10515 3981 10517 3974 10530

      3989 10541 3993 10540 3994 10544 3997 10546

      4026 10546



$$



DANKERS

