Very heavy rain produced flash flooding in southeast Elbert County.
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Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
The episode as NWS BOU wrote it up.
Very heavy rain produced flash flooding in southeast Elbert County.
The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Denver/Boulder, CO wrote its last area forecast discussion before the first event at Aug 2, 2:18 PM MST, 5 hours 42 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE DENVER CO 318 PM MDT MON AUG 2 2010 .SHORT TERM...WATER VAPOR LOOPS SHOW SHORTWAVE NEAR FOUR CORNERS... HASN'T MOVE MUCH IN THE LAST FEW HOURS. SCATTERED SHOWERS AND STORMS HAVE DEVELOPED OVER THE MOUNTAINS AND FOOTHILLS AHEAD OF THE WAVE. MOST OF THE ACTIVITY IS OCCURRING ACROSS LARIMER COUNTY. ACARS SOUNDINGS SHOW PLAINS STILL CAPPED. INTEGRATED PRECIPITABLE WATER VALUES NEARING AN INCH AND A QUARTER ACROSS URBAN CORRIDOR. STORMS SHOULD PRODUCE SOME HEAVY RAIN. BASED ON RADAR...IT APPEARS THAT STORMS ARE MOVING ROUGHLY 10 KTS. SO FAR NO FLOODING ISSUES AND STORM MOVEMENT SHOULD KEEP THINGS FROM HANGING AROUND IN ONE PLACE. MODELS SHOW SHORTWAVE WEAKENING AS IT MOVES ACROSS NORTHEAST COLORADO THIS EVENING. BULK OF THE ASCENT STAYS TO THE SOUTH OF THE CFWA..THOUGH THERE IS A BIT ACROSS THE AREA. BASED ON THIS APPROACHING WAVE...WILL KEEP THE HIGHER POPS ACROSS THE SOUTHERN SECTIONS OF THE CFWA THIS EVENING. MODELS KEEP SOME ASCENT ACROSS AREA OVERNIGHT...ENOUGH TO KEEP SOME SHOWERS AND LOW POPS ACROSS AREA. MODELS PAINT SOME LIGHT QPF ACROSS REGION. AIRMASS SHOULD STABILIZE A BIT...BUT WILL KEEP THE THREAT OF THUNDER AS WELL. ON TUESDAY...ALL MODELS INDICATE SUBSIDENCE AND QG DESCENT ACROSS REGION BY 18Z BEHIND EXITING SHORTWAVE. IF THIS PANS OUT...MOST OF THE ACTIVITY COULD OCCUR DURING THE MORNING. FOR NOW WILL KEEP THE CHANCE POPS FOR THE AFTERNOON. BEST CHANCE FOR STORMS LOOKS TO BE ACROSS THE SOUTHWEST PORTION OF THE CWFA. PRECIPITABLE WATER VALUES PROGGED TO INCREASE TO 1.3 INCHES ACROSS PLAINS AND AROUND EIGHT TENTHS OF AN INCH OVER THE MOUNTAINS. FORECAST SOUNDINGS SHOW WEAK STORM MOTION. SO ANY STORM THAT DEVELOPS WILL BE SLOW MOVING AND COULD PRODUCE BRIEF HEAVY RAIN. .LONG TERM...AN UPPER LEVEL RIDGE WILL BE CENTERED OVER THE SCNTRL US ON TUE AS A DISTURBANCE IS FCST TO MOVE ACROSS NERN COLORADO. THE GFS HAS THIS FEATURE OVER NERN CO BY 12Z TUE WHILE THE NAM IS 6 HOURS SLOWER. IF THIS FEATURE MOVES ACROSS EARLIER AS SHOWN BY GFS THEN BEST CHANCE OF RAIN OVER NERN CO WILL BE IN THE MORNING HOURS INTO THE EARLY AFTN WITH SUBSIDENCE DEVELOPING BY LATE AFTN INTO THE EVENING HOURS AS SYSTEM MOVES AWAY FM THE AREA. IN THE MTNS SOME DRYING IS SHOWN HOWEVER STILL SHOULD SEE SOME SCT TSTMS IN THE AFTN HOURS. HIGHS ON TUE OVER NERN CO WILL DEPEND ON TIMING OF SYSTEM AND CLOUD COVER AS READINGS MAY ONLY WRM INTO THE 70S OVER THE PLAINS IF SYSTEM COMES ACROSS QUICKER WHILE READINGS NR THE FOOTHILLS RISE INTO THE 80S. .LONG TERM...SHOWERS AND STORMS WILL CONTINUE TO DISSIPATE TUESDAY EVENING AS SUBSIDENCE MOVES OVERHEAD BEHIND THE PASSING DISTURBANCE. COULD SEE SOME ACTIVITY LAST THROUGH THE NIGHT...MOST LIKELY OVER THE FAR EASTERN PLAINS AND SOUTHERN HIGHER TERRAIN. FLOW ALOFT WILL BECOME MORE WEST NORTHWEST WEDNESDAY AS RIDGING BUILDS SLIGHTLY UP ALONG THE ROCKY MOUNTAIN RANGE. AT THE SAME TIME...A SURFACE HIGH WILL BUILD SOUTH ALONG THE LEESIDE OF THE RANGE TO PUSH A WEAK FRONT INTO THE STATE IN THE MORNING AND CREATE UPSLOPE FLOW. THIS WILL CREATE ANOTHER DAY OF SCATTERED SHOWERS AND THUNDERSTORMS OVER THE FORECAST AREA...WITH THE BEST MOISTURE OVER AND UP AGAINST THE MOUNTAINS. RIDGING ALOFT WILL CONTINUE TO BUILD OVER THE ROCKIES THURSDAY FOR LESS COVERAGE OF THUNDERSTORMS. THEN THE MODELS CONTINUE THIS TREND BY SHOWING DRIER AIR AND LESS COVERAGE OF PRECIPITATION THROUGH THE REST OF THE WEEKEND...SHOULD SEE NEAR NORMAL TEMPERATURES AND POPS...AND THUNDERSTORMS WILL HAVE LESS OF A THREAT OF HEAVY RAIN THAT HAS BEEN EXPERIENCED RECEN && .AVIATION...CHANCE FOR THUNDERSTORMS ACROSS AREA THROUGH 04Z... MAINLY WEST AND SOUTH OF DENVER. HEAVY RAIN AND WIND GUSTS TO 40 MPH WILL BE THE MAIN THREATS. VFR CONDITIONS TO PREVAIL...THOUGH MVFR CEILINGS AND VISIBILITIES POSSIBLE WITH THE HEAVIER SHOWERS. ATMOSPHERE STABLIZE BY 06Z...WITH A FEW SHOWERS LINGERING OVERNIGHT. CEILINGS COULD LOWER TO AROUND 5000 FEET AGL OVERNIGHT WHICH MAY IMPACT ILS APPROACHES. LIGHT SOUTHWEST DRAINAGE WINDS WILL LIMIT DEVELOPMENT OF FOG. CHANCE FOR THUNDERSTORMS AFTER 18Z...MAINLY ALONG FOOTHILLS AND PALMER DIVIDE AREAS. HEAVY RAIN AND WIND GUSTS TO 40 MPH AGAIN THE MAIN THREATS WITH MVFR CONDITIONS WITH THE HEAVY RAIN. && .BOU WATCHES/WARNINGS/ADVISORIES...NONE. D-L/KRIEDERMAN
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE DENVER CO 1030 AM MDT MON AUG 02 2010 COZ030>051-031200- JACKSON COUNTY BELOW 9000 FEET-WEST JACKSON AND WEST GRAND COUNTIES ABOVE 9000 FEET-GRAND AND SUMMIT COUNTIES BELOW 9000 FEET-SOUTH AND EAST JACKSON/LARIMER/NORTH AND NORTHEAST GRAND/ NORTHWEST BOULDER COUNTIES ABOVE 9000 FEET-SOUTH AND SOUTHEAST GRAND/WEST CENTRAL AND SOUTHWEST BOULDER/GILPIN/CLEAR CREEK/ SUMMIT/NORTH AND WEST PARK COUNTIES ABOVE 9000 FEET-LARIMER AND BOULDER COUNTIES BETWEEN 6000 AND 9000 FEET-JEFFERSON AND WEST DOUGLAS COUNTIES ABOVE 6000 FEET/GILPIN/CLEAR CREEK/NORTHEAST PARK COUNTIES BELOW 9000 FEET-CENTRAL AND SOUTHEAST PARK COUNTY-LARIMER COUNTY BELOW 6000 FEET/NORTHWEST WELD COUNTY-BOULDER AND JEFFERSON COUNTIES BELOW 6000 FEET/WEST BROOMFIELD COUNTY-NORTH DOUGLAS COUNTY BELOW 6000 FEET/DENVER/WEST ADAMS AND ARAPAHOE COUNTIES/ EAST BROOMFIELD COUNTY-ELBERT/CENTRAL AND EAST DOUGLAS COUNTIES ABOVE 6000 FEET-NORTHEAST WELD COUNTY-CENTRAL AND SOUTH WELD COUNTY-MORGAN COUNTY-CENTRAL AND EAST ADAMS AND ARAPAHOE COUNTIES- NORTH AND NORTHEAST ELBERT COUNTY BELOW 6000 FEET/NORTH LINCOLN COUNTY-SOUTHEAST ELBERT COUNTY BELOW 6000 FEET/SOUTH LINCOLN COUNTY-LOGAN COUNTY-WASHINGTON COUNTY-SEDGWICK COUNTY-PHILLIPS COUNTY- 1030 AM MDT MON AUG 02 2010 THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHEAST AND NORTH CENTRAL COLORADO. .DAY ONE...TODAY AND TONIGHT THERE IS A CHANCE FOR SHOWERS AND THUNDERSTORMS AGAIN THIS AFTERNOON AND EVENING ACROSS NORTHEAST AND NORTH CENTRAL COLORADO. THE BEST CHANCE FOR THUNDERSTORMS WILL BE SOUTH OF INTERSTATE 70. THE STORMS WILL BE SLOW MOVING AND MAY PRODUCE HEAVY RAIN WITH RAINFALL RATES OF UP TO 2 INCHES PER HOUR. THE HEAVY RAINFALL MAY CAUSE LOCALIZED FLOODING OF LOW LYING AREAS. THE SHOWERS AND STORMS WILL DECREASE LATE THIS EVENING...THOUGH A FEW SHOWERS COULD LINGER OVERNIGHT. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY AN UPPER LEVEL DISTURBANCE WILL MOVE ACROSS NORTHEAST COLORADO DURING THE EARLY PART OF TUESDAY BRING A GOOD CHANCE OF SHOWERS AND THUNDERSTORMS WITH HEAVY RAIN POSSIBLE OVER THE PLAINS. SHOWERS AND STORMS SHOULD DISSIPATE BEGINNING IN THE MID TO LATE AFTERNOON AS SUBSIDENCE SETTLES IN BEHIND THE SHORTWAVE. OTHERWISE MONSOONAL MOISTURE WILL CONTINUE TO FLOW OVERHEAD THROUGH THE PERIOD WITH A CHANCE OF AFTERNOON AND EVENING THUNDERSTORMS EACH DAY...A BIT MORE NUMEROUS ACROSS THE MOUNTAINS AND HIGHER TERRAIN. THE MAIN THREAT WITH THESE STORMS WILL BE HEAVY RAIN. TEMPERATURES WILL BE NEAR NORMAL THROUGH THURSDAY AND THEN SLIGHTLY ABOVE NORMAL FRIDAY THROUGH SUNDAY. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT ANTICIPATED TODAY OR TONIGHT. HOWEVER REPORTS OF HEAVY RAINFALL AND FLOODING WILL BE APPRECIATED. LESZCYNSKI/KRIEDERMAN
The Pueblo radar (KPUX), 53 km away, was scanning. The volume nearest the first event began at 03:00 UTC.
1 flash flood. Local standard time, as filed.
Thunderstorms producing very heavy rain caused flash flooding near Kutch. Several county roads were washed out by the floodwaters.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Colorado in 2010Every state in 2010This day in weather historyWarnings in Colorado, August 2010
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 252450.