Severe thunderstorms produced large hail up to golfball size. The combination of heavy rain and snowmelt also produced a prolonged period of flooding over southern Jefferson and southwestern Douglas 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.
Severe thunderstorms produced large hail up to golfball size. The combination of heavy rain and snowmelt also produced a prolonged period of flooding over southern Jefferson and southwestern Douglas 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 Jun 14, 2:19 AM MST, 11 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE DENVER/BOULDER CO 319 AM MDT SUN JUN 14 2015 .SHORT TERM...(TODAY THROUGH TONIGHT ) ISSUED AT 315 AM MDT SUN JUN 14 2015 COLORADO REMAINS UNDER WEAK LOW PRESSURE ALOFT WITH VERY WEAK FLOW ALOFT. THERE STILL REMAINS QUITE A BIT OF MIDDLE AND HIGH LEVEL MOISTURE OVER CENTRAL AND EASTER PORTIONS OF THE STATE WHILE INTEGRATED PW VALUES FROM GPS SHOWING SLIGHT INCREASES OF AROUND A TENTH OF AN INCH FROM 24 HOURS AGO. WATER VAPOR IMAGERY SHOWING SOME DRYING OVER NORTHERN UTAH AND APPEARS SOME OF THIS DRYING WILL TRY AND WORK INTO NORTHWEST AND NORTHERN COLORADO WITH TIME TODAY. NOT SURE IF THIS DRYING WILL MAKE IT ALL THE WAY TO THE FRONT RANGE. MODELS SHOWING SOME OF THIS DRYING WITH LACK OF QPF BY LATE AFTERNOON WITH FOCUS AREAS OF THE HIGHER FOOTHILLS AND FURTHER EAST ALONG A LINE FROM LIMON THRU JULESBURG. APPEARS THERE IS SOME MOISTURE CONVERGENCE ZONE OUT ON THE PLAINS AND WHILE LOWER 60 DEWPOINTS CONTINUE UNDER A LIGHT SOUTHEAST FLOW. SHORT RANGE HIGH RESOLUTION MODELS ARE SHOWING THIS ENHANCED LINE OF QPF BY EARLY THIS AFTERNOON. WILL ADJUST GRIDS A BIT TO SHOW THIS HIGHER PROBABILITY OF STORMS THERE. SURFACE BASED CAPES OUT EAST ARE 1000-1500J/KG SO COULD BE AN ISOLATED SEVERE STORM BUT GIVEN WEAK WINDS ALOFT WOULD BE SOME MARGINAL LARGE HAIL UP TO AN INCH IN DIAMETER ALONG WITH HEAVY RAIN. FOR TONIGHT...SURFACE COLD FRONT WILL MOVE SOUTHWARD OVER THE PLAINS BETWEEN 06-12Z WITH STRATUS AND SHOWERS DEVELOPING ALONG AND BEHIND THE FRONT. TOWARDS DAYBREAK...MOISTURE DEPTH MAY BE DEEP ENOUGH FOR VERY LIGHT RAIN OR DRIZZLE ALONG FOOTHILLS AND ADJACENT PLAINS. .LONG TERM...(MONDAY THROUGH SATURDAY) ISSUED AT 315 AM MDT SUN JUN 14 2015 UPPER LEVEL ZONAL FLOW DOMINATES NORTHERN PORTIONS OF THE CONUS WITH A TROUGH DIPPING SOUTH. A BACK DOOR COLD FRONT WILL MOVE INTO EASTERN COLORADO MONDAY MORNING INCREASING FAVORABLE UPSLOPE FLOW ALONG THE FOOTHILLS. HIGH TEMPERATURES WILL DIP BELOW SEASONAL NORMALS BEFORE REBOUNDING FOR THE REMAINDER OF THE WEEK. THE BEST SHEAR WILL BE EARLY ON WITH INCREASING CAPE INSTABILITY THROUGH THE MORNING AND AFTERNOON. MODELS HAVE SIGNIFICANT QPF PEGGED CLOSER TO THE FOOTHILLS...PARK COUNTY AND PALMER DIVIDE AREA. STRONG TO SEVERE STORMS WILL BE POSSIBLE WITH THE MAIN THREATS BEING HEAVY RAIN AND MARGINAL HAIL. MONDAY NIGHT INTO TUESDAY TEMPERATURES WILL REBOUND BACK TO SEASONAL NORMALS WITH HIGHS IN THE MID 80S. INCREASED WESTERLY UPPER LEVEL FLOW WILL RETURN OVER NE COLORADO. THERE IS ENOUGH LINGERING MOISTURE IN THE MODELS TO KEEP A SLIGHT CHANCE OF AFTERNOON AND EVENING THUNDERSTORMS IN THE FORECAST. WEDNESDAY INTO THURSDAY WILL BRING ANOTHER ROUND OF SHOWERS AND THUNDERSTORMS WITH A SHORTWAVE EMBEDDED IN THE ZONAL FLOW ALOFT. MOISTURE INCREASES WEDNESDAY AFTERNOON WITH DECENT UPSLOPE AND QPF BY WEDNESDAY EVENING. CAPE INCREASES BY WEDNESDAY EVENING WITH POSSIBLE HEAVY RAIN AND HIGH WINDS BEING THE MAIN THREATS. FRIDAY COULD BRING A REPRIEVE FOR THE REGION FROM RAIN WITH UPPER LEVEL RIDGING MOVING IN AND HIGHS PROGGED TO GET INTO THE LOWER 90S. BY SATURDAY MODELS INDICATE ANOTHER SHORTWAVE FOR NE COLORADO THAT COULD BRING ANOTHER ROUND OF SEVERE STORMS...HOWEVER WILL MAINTAIN A SLIGHT CHANCE AT THIS POINT DUE TO SOME UNCERTAINTY AMONGST MODELS. && .AVIATION...(FOR THE TAFS THROUGH 12Z MONDAY MORNING) ISSUED AT 122 AM MDT SUN JUN 14 2015 EXPECT ISOLATED TO SCATTERED STORM COVERAGE AFTER 23Z THIS AFTERNOON WITH HEAVY RAIN AND GUSTY WINDS THE MAIN THREATS. SURFACE COLD FRONT WILL MOVE INTO TERMINALS BETWEEN 08-10Z LATER TONIGHT WITH NORTHEAST SURFACE WINDS. APPEARS STRATUS AND LIGHT RAIN SHOWERS/DRIZZLE WILL DEVELOP BEHIND THE FRONT BY 1-2 HOURS AND CONTINUING THROUGH MONDAY AM WITH IFR/MVFR CIGS. && .HYDROLOGY... ISSUED AT 315 AM MDT SUN JUN 14 2015 2 TO 3 INCHES OF RAIN FELL IN SOME AREAS FROM NORTH OF DIA TO PLATTEVILLE TO MILLIKEN LATE SAT AFTN INTO THE EARLY EVENING HOURS. HIGHER WATER LEVELS ALREADY HAVE PEAKED AND DROPPED ALONG BIG THOMPSON RIVER AT LA SALLLE BUT EXPECT RIVER LEVELS TO RISE AGAIN INTO THE SOUTH PLATTE TOWARDS THE KERSEY AREA WITH LEVELS CLOSING IN ON THE 11.5 FT FOR MODERATE FLOODING. WILL WATCH THIS CLOSELY. FLOOD WARNINGS IN THE GREELEY AREA WILL REMAIN IN PLACE FOR A COUPLE MORE DAYS AS THE RIVER WILL BE SLOW TO RECEDE. STILL EXPECT HEAVY RAIN WITH SLOW MOVING THUNDERSTORMS AGAIN THIS AFTERNOON AND TONIGHT BUT COVERAGE WILL BE MORE ISOLATED IN NATURE...SIMILAR TO SATURDAY. MOIST SOIL CONDITIONS ALONG WITH THE POSSIBILITY OF BRIEF MODERATE TO HEAVY RAIN AND WARMER TEMPERATURES ACROSS NORTHERN COLORADO NEXT WEEK WILL CAUSE CREEKS AND RIVERS TO CONTINUE RUNNING HIGHER THAN NORMAL. && .BOU WATCHES/WARNINGS/ADVISORIES... NONE. && SHORT TERM...ENTREKIN LONG TERM...BOWEN AVIATION...ENTREKIN HYDROLOGY...ENTREKIN/BOWEN
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE DENVER/BOULDER CO 1101 AM MDT SAT JUN 13 2015 COZ030>051-141715- 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- 1101 AM MDT SAT JUN 13 2015 THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHEAST AND NORTH CENTRAL COLORADO. .DAY ONE...TODAY AND TONIGHT SCATTERED SHOWERS AND THUNDERSTORMS WILL DEVELOP BY AFTERNOON OVER THE MOUNTAINS AND SPREAD ACROSS THE ADJACENT PLAINS BY LATE AFTERNOON AND EVENING. EXPECT BRIEF HEAVY RAIN AND GUSTY WINDS WITH THE STRONGER STORMS. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY THERE WILL BE A CHANCE OF AFTERNOON AND EVENING SHOWERS AND THUNDERSTORMS EACH DAY WITH TEMPERATURES CLIMBING ABOVE SEASONAL NORMALS NEXT WEEK. MONDAY WILL BE THE COOLEST DAY WITH THE BEST CHANCE FOR SHOWERS AND STORMS. MOIST SOIL CONDITIONS AND WARMER TEMPERATURES ACROSS NORTHERN COLORADO NEXT WEEK WILL CAUSE CREEKS AND RIVERS TO CONTINUE RUNNING HIGHER THAN NORMAL. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED TODAY OR TONIGHT.
The Denver radar (KFTG), 68 km away, was scanning. The volume nearest the first event began at 09:29 UTC.
3 hail, 2 flood. Local standard time, as filed.
The combination of heavy rain and snowmelt caused minor flooding in southern Jefferson County. Road closures included West Platte River Rd from Buffalo Creek, and sections of South West River Rd and West Pine Creek Rd.
River flooding forced the closure of twenty campgrounds. State Highway 67 near Deckers and Spruce Wood were restricted to local traffic only.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Colorado in 2015Every state in 2015This day in weather historyWarnings in Colorado, June 2015
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: 591920, 591930, 572911, 572912, 572913.