Thunderstorms with heavy rain produced localized flash flooding in the vicinity of Loveland.
Every event with a place to put it. Tap one for its entry below.
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.
Thunderstorms with heavy rain produced localized flash flooding in the vicinity of Loveland.
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 May 23, 2:45 PM MST, 4 hours 33 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE DENVER/BOULDER CO 345 PM MDT FRI MAY 23 2014 .SHORT TERM...(THIS EVENING THROUGH SATURDAY) ISSUED AT 344 PM MDT FRI MAY 23 2014 THE SHOWERS AND THUNDERSTORMS WILL CONTINUE THROUGH THE AFTERNOON AND EARLY EVENING HOURS. CAPES ARE AROUND 1000 J/KG ALONG THE FRONT RANGE...SLIGHTLY LOWER OVER THE EASTERN PLAINS WHERE CLOUD COVER SLOWED HEATING THIS MORNING. WEAK SHEAR AND THE DECREASED INSTABILITY TODAY WILL KEEP MOST STORMS FROM BECOMING SEVERE. THE STRONGER STORMS WILL BE CAPABLE OF PRODUCING HEAVY RAIN AND SMALL HAIL. THE SHOWERS AND THUNDERSTORMS WILL DECREASE THROUGH THE EVENING HOURS AS THE AIRMASS STABILIZES. SLIGHTLY DRIER AIR AND DOWNWARD MOTION BEHIND THE WAVE MOVING ACROSS NORTHEAST COLORADO WILL RESULT IN LITTLE TO NO ACTIVITY LATE TONIGHT AND EARLY SATURDAY. PARTLY CLOUDY SKIES ARE EXPECTED EARLY SATURDAY. THIS WILL ALLOW TEMPERATURES TO WARM. HIGHS WILL BE A LITTLE WARMER SATURDAY WITH READINGS IN THE LOWER TO MID 70S. AIRMASS WILL REMAIN MOIST AND UNSTABLE...THOUGH SLIGHTLY LESS THAN TODAY. CAPES WILL BE 500-1500 J/KG AND DEW POINTS WILL BE IN THE MID 40S TO LOWER 50S IN THE AFTERNOON. SHEAR WILL BE WEAK AGAIN SO NOT EXPECTING ANY SEVERE WEATHER. .LONG TERM...(SATURDAY NIGHT THROUGH FRIDAY) ISSUED AT 344 PM MDT FRI MAY 23 2014 UPPER LOW CENTERED NEAR THE FOUR CORNERS SATURDAY EVENING...MAKING A VERY SLOW TREK EASTWARD. SHOWERS AND STORMS TO PERSIST INTO THE EVENING WITH FAIRLY DECENT MOISTURE AND WEAK EASTERLY FLOW. CAPES EXPECTED TO BE FAIRLY LOW EXCEPT ALONG EASTERN BORDER WHERE VALUES LOOK TO BE AROUND 1000 J/KG. STEERING WINDS RATHER LIGHT SO THE SHOWERS AND STORMS WILL BE SLOW MOVERS AND COULD PRODUCE BRIEF HEAVY RAIN. MODELS CONTINUE TO INDICATE SOME DRYING MOVING NORTH INTO THE AREA OVERNIGHT. SHOULD BE LESS ACTIVITY AS A RESULT WITH ENOUGH MOISTURE TO KEEP SOME SHOWERS AND A FEW STORMS GOING. AIRMASS DOES COOL A BIT WITH THE POTENTIAL FOR SOME SNOW ACROSS THE HIGHER RIDGES WITH THE SNOW LEVEL FAIRLY HIGH. ANY ACCUMULATION TO BE MINIMAL. ON SUNDAY...MODELS SHOW THE UPPER LOW SLOWLY MOVING ACROSS SOUTHERN COLORADO AND NORTHERN NEW MEXICO DURING THE DAY. LOW ALOFT BECOMES A BIT MORE SOUTHERLY WITH A BIT MORE MOISTURE ADVECTING INTO THE REGION. AIRMASS TO BECOME A BIT MORE UNSTABLE BY THE AFTERNOON AS MID LEVEL COLD POOL ASSOCIATED WITH THE UPPER LOW SPREADS INTO THE AREA. SHOULD SEE SHOWERS AND STORMS INCREASE AT THAT TIME. SNOW LEVEL LOWERS TO AROUND 12000 FEET WITH SOME LIGHT ACCUMULATION ACROSS THE HIGHER PASSES. STORM MOTION STILL FAIRLY LIGHT...THOUGH MORE SOUTHERLY THAT SOUTHEAST. STILL SOME POTENTIAL FOR SLOW MOVING STORMS PRODUCING BRIEF HEAVY RAIN. TEMPERATURES TO BE SLIGHTLY COOLER DUE TO MORE CLOUDS AND COOLER AIRMASS. ACTIVITY TO DECREASE DURING THE EVENING AS AIRMASS STABILIZES AND BEGINS TO DRY OUT. FOR MONDAY...UPPER LOW MOVES INTO SOUTHEAST COLORADO AND NORTHEAST NEW MEXICO. MODELS INDICATE MOISTURE INCREASING AGAIN BY THE AFTERNOON AS IT WRAPS AROUND THE LOW INTO THE AREA. THIS TO PROVIDE FOR ANOTHER ROUND OF SHOWERS AND STORMS...MAINLY DURING THE AFTERNOON. NORTHWEST WINDS AROUND 700 MB WILL KEEP THE ACTIVITY LOW IN AND NEAR THE FOOTHILLS AND WILL KEEP THE LOWER POPS THERE. AIRMASS BECOMES A BIT WARMER ALLOWING TEMPERATURES TO BE WARMER THAT SUNDAY. UPPER RIDGE TO BUILD IN FROM THE WEST TUESDAY AND WEDNESDAY... LEADING TO WARMER AND DRIER CONDITIONS. STILL ENOUGH MOISTURE AROUND THROUGH FRIDAY FOR MAINLY AFTERNOON AND EVENING THUNDERSTORMS ACROSS THE HIGH COUNTRY. MOISTURE WILL BEGIN SPREADING NORTH ACROSS THE PLAINS WEDNESDAY AND WILL GRADUALLY INCREASE THROUGH FRIDAY. WILL CONTINUE THE SLIGHT CHANCE OF MAINLY AFTERNOON AND EVENING THUNDERSTORMS. && .AVIATION...(FOR THE TAFS THROUGH 00Z SATURDAY LATE AFTERNOON) ISSUED AT 344 PM MDT FRI MAY 23 2014 SHOWERS AND THUNDERSTORMS WILL DECREASE AFTER 00Z. HEAVY RAIN AND SMALL HAIL WILL BE POSSIBLE WITH THE STRONGER STORMS. THE STORMS TODAY WILL NOT BE AS STRONG AS THE PAST FEW DAYS. CEILINGS BELOW 4000 FEET WILL BE POSSIBLE WITH THE THUNDERSTORMS. PATCHY FOG AND LOW CLOUDS WILL BE POSSIBLE 10-15Z. EAST TO SOUTHEAST WINDS WILL CONTINUE THROUGH THE AFTERNOON AND EVENING. THE WINDS WILL TURN SOUTHERLY LATE TONIGHT AND BE LIGHT SATURDAY MORNING. ANOTHER ROUND OF SHOWERS AND THUNDERSTORMS ARE EXPECTED SATURDAY AFTERNOON. THE STRONGER STORMS WILL BE CAPABLE OF PRODUCING HEAVY RAIN AND SMALL HAIL. && .HYDROLOGY... ISSUED AT 344 PM MDT FRI MAY 23 2014 SOME STREAMS ARE RUNNING HIGH DUE TO SNOWMELT AND RUNOFF FROM RECENT RAINFALL...ESPECIALLY OVER NORTHERN LARIMER COUNTY AND OVER EASTERN ADAMS...EASTERN ARAPAHOE AND SOUTHERN MORGAN COUNTIES. ADDITIONAL RAINFALL WILL KEEP THESE STREAMS AND RIVERS RUNNING NEAR BANK FULL. ADDITIONAL AFTERNOON AND EVENING SHOWERS AND THUNDERSTORMS ARE EXPECTED TODAY AND SATURDAY. RAINFALL RATES OF ONE INCH IN 45 MINUTES WILL BE POSSIBLE UNDER THE STRONGEST STORMS AS THEY SLOWLY MOVE NORTH. AIRMASS WILL BE SLIGHTLY DRIER ON SATURDAY...BUT STILL CAPABLE OF PRODUCING BRIEF HEAVY RAIN. AFTERNOON AND EVENING SHOWERS AND THUNDERSTORMS WILL BE POSSIBLE SUNDAY AND AGAIN MONDAY. THE AIRMASS WILL BE A BIT DRIER SUNDAY BUT STORMS COULD STILL PRODUCE BRIEF HEAVY RAIN. THERE WILL BE SOME INCREASE IN MOISTURE MONDAY...BUT AN INCREASE IN STORM MOTION SHOULD KEEP THE FLOOD THREAT LOW. && .BOU WATCHES/WARNINGS/ADVISORIES... NONE. && SHORT TERM...MEIER LONG TERM...D-L AVIATION...MEIER HYDROLOGY...MEIER
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE DENVER/BOULDER CO 1036 AM MDT FRI MAY 23 2014 COZ030>051-241645- 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- 1036 AM MDT FRI MAY 23 2014 THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHEAST AND NORTH CENTRAL COLORADO. .DAY ONE...TODAY AND TONIGHT ANOTHER ROUND OF SHOWERS AND THUNDERSTORMS WILL OCCUR THIS AFTERNOON INTO THE EVENING HOURS. THE THUNDERSTORM ACTIVITY WILL NOT BE AS STRONG AS THE PAST FEW DAYS. HOWEVER SOME SMALL HAIL AND HEAVY RAIN MAY STILL OCCUR WITH SOME OF THE STORMS WITH UP TO AN INCH OF RAINFALL POSSIBLE. THE SHOWER AND THUNDERSTORM ACTIVITY SHOULD GRADUALLY END EARLY THIS EVENING. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY THERE WILL BE A CHANCE OF SLOW-MOVING THUNDERSTORMS SATURDAY AND SUNDAY ALTHOUGH THE AVAILABLE MOISTURE WILL BE SLIGHTLY LESS THAN PREVIOUS DAYS. ON MONDAY...WRAP-AROUND MOISTURE FROM A DEPARTING STORM SYSTEM WILL BRING A GOOD SHOT OF SHOWERS AND THUNDERSTORMS. DRIER CONDITIONS CAN BE EXPECTED TUESDAY THROUGH THURSDAY WITH A SLOW WARMING TREND. ENOUGH MOISTURE WILL BE AROUND FOR DAILY SHOWERS AND POSSIBLE THUNDERSTORMS IN THE HIGH COUNTRY EACH DAY. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED TODAY OR TONIGHT.
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE DENVER CO
251 PM MDT FRI MAY 23 2014
COZ039-040-232130-
BOULDER AND JEFFERSON COUNTIES BELOW 6000 FEET/WEST BROOMFIELD COUNTY
CO-
NORTH DOUGLAS COUNTY BELOW 6000 FEET/DENVER/WEST ADAMS AND ARAPAHOE
COUNTIES/EAST BROOMFIELD COUNTY CO-
251 PM MDT FRI MAY 23 2014
...SPECIAL WEATHER STATEMENT...
AT 247 PM MDT...DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM OVER
EASTERN ARVADA...OR 7 MILES NORTHWEST OF DENVER...MOVING NORTH AT 10
MPH.
HALF INCH HAIL AND WINDS IN EXCESS OF 30 MPH WILL BE POSSIBLE WITH
THIS STORM.
RADAR WAS ALSO INDICATING VERY HEAVY RAINFALL FORM THIS SLOW MOVING
STORM. UP TO THREE TENTHS OF AN INCH OF RAIN HAS FALLEN IN THE PAST
15 MINUTES NEAR THE INTERSECTION OF 44TH AVENUE AND SHERIDAN
BOULEVARD IN NORTHWEST DENVER.
LOCATIONS IMPACTED INCLUDE...
NORTHWESTERN DENVER...LAKEWOOD...SOUTHERN THORNTON...ARVADA...
WESTMINSTER...NORTHGLENN...WHEAT RIDGE...EASTERN GOLDEN AND FEDERAL
HEIGHTS.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
VERY HEAVY RAINFALL IS OCCURRING WITH THIS STORM...AND MAY LEAD TO
MINOR STREET FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED
ROADWAYS.
THIS STORM MAY INTENSIFY...SO BE CERTAIN TO MONITOR LOCAL RADIO AND
TV STATIONS...AS WELL AS LOCAL CABLE TV OUTLETS...FOR ADDITIONAL
INFORMATION AND POSSIBLE WARNINGS FROM THE NATIONAL WEATHER SERVICE.
&&
LAT...LON 3989 10492 3966 10504 3967 10519 3968 10519
3968 10516 3971 10515 3972 10518 3987 10514
3991 10505
TIME...MOT...LOC 2047Z 187DEG 8KT 3982 10506
BAKERThe Denver radar (KFTG), 74 km away, was scanning. The volume nearest the first event began at 02:16 UTC.
2 flash flood. Local standard time, as filed.
Heavy rainfall produced flash flooding south of Loveland. Running water, up to 6 inches deep, overflowed ditches and onto the highway near Campion and Lone Tree Reservoir. South County Road 9 and East Highway 402 were closed.
Thunderstorms with locally heavy rain, produced flash flooding in west Loveland. One to two feet of standing water was observed over major intersections. Wilson Ave and 43rd St was closed, as well as Cascade Ave and US 34.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Colorado in 2014Every state in 2014This day in weather historyWarnings in Colorado, May 2014
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: 524168, 524143.