A winter-like storm brought heavy snow to parts of the North-Central Mountains, Front Range Foothills and South Park. 5 inches at Jackwhacker Gulch, Pine Junction and Tower SNOTEL, 10 inches at Hoosier Pass, Lake George, 4 miles east of Masonville and Rollinsville.
Every event with a place to put it; 5 filed by county or forecast zone are drawn at its center, in a lighter ring. 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.
A winter-like storm brought heavy snow to parts of the North-Central Mountains, Front Range Foothills and South Park. Storm totals included: 16.5 inches at Echo Lake, 14 inches at Berthoud SNOTEL, 8 miles north of Blackhawk and 3 miles southeast of Pinecliffe, 13.5 inches, 8 miles northwest of Evergreen, 12 inches at Arrow SNOTEL, 4 miles west-northwest of Conifer, Lake Eldora and Winter Park, 11.5 inches, 3 miles north of Blackhawk, 11 inches, 4 miles west-northwest of Eldorado Springs, 10.5 inches at Jackwhacker Gulch, Pine Junction and Tower SNOTEL, 10 inches at Hoosier Pass, Lake George, 4 miles east of Masonville and Rollinsville.
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 Apr 24, 3:23 AM MST, 7 hours 37 minutes earlier.
AREA FORECAST DISCUSSION...CORRECTION NATIONAL WEATHER SERVICE DENVER CO 423 AM MDT SUN APR 24 2005 CORRECTED SUNDAY TO MONDAY IN FIRST PARAGRAPH OF LONG TERM DISCUSSION .SHORT TERM...DECENT PRECIPITATION EVENT APPEARS TO BE IN STORE FOR MUCH OF THE CWA LATER TODAY AND TONIGHT AS RESPECTABLE ASCENT AND MOISTURE MOVE OVER THE AREA. ALTHOUGH THE NAM IS DRIER THAN THE GFS IT TOO BRINGS DECENT PRECIPITATION TO MUCH OF THE AREA. WILL POST AN ADVISORY FOR ZONES 34 AND 37 FOR THIS AFTERNOON AND TONIGHT AS AREAS OF SOUTH PARK AND THE MOSQUITO RANGE SHOULD DO WELL WITH THE PREDICTED SOUTHEAST FLOW. ZONE 36 MAY NEED TO BE ADDED IN LATER BUT WILL WAIT TO SEE HOW THE PRECIPITATION TYPES EVOLVE DURING THE DAY. A NOTE ON KFTG RADAR DATA...VELOCITY DATA PROBLEMS ARE CAUSING THE CLUTTER SUPPRESSION ALGORITHM TO FAIL. .LONG TERM...STORM SYSTEM WILL GET SHEARED OUT AND KICK TO THE SOUTHEAST BY MONDAY MORNING. PRECIP EVENT EXPECTED TO WIND DOWN RATHER QUICKLY WITH DRIER AIR COMING IN FROM THE NORTHWEST. WILL STILL MENTION SOME SNOW LIKELY OVER SUMMIT AND PARK COUNTIES AS WELL AS THE SOUTHERN FRONT RANGE FOOTHILLS WITH BEST MOISTURE LEFT BEHIND IN THAT AREA. SMALLER CHANCES OF PRECIP FARTHER NORTH AND EAST BUT CANT RULE OUT SOME CONVECTIVE SHOWER DEVELOPMENT IN AFTERNOON AS LAPSE RATES STEEPEN WITH DAYTIME HEATING. BY TUESDAY...MODELS IN FAIRLY GOOD AGREEMENT WITH ENOUGH SUBSIDENCE AND DRYING TO REMOVE ANY PRECIP CHANCES. THEN LOTS OF QUESTIONS TO HOW MID TO LATE WEEK WEATHER WILL PAN OUT. THE LATEST 00Z RUNS BRING COLD FRONT ACROSS NORTHEAST COLORADO TUESDAY NIGHT WITH SOME SHALLOW UPSLOPE AND Q-G FORCED VERTICAL MOTIONS. THIS COULD LEAD TO SOME CHANCE OF PRECIP BY WEDNESDAY SO INCLUDED SOME POPS THERE AS WELL. MORE SIGNIFICANT PRECIP EVENT MAY EVENTUALLY UNFOLD WHEN UPPER LOW OVER THE EASTERN PACIFIC GETS PULLED INTO THE LONGWAVE TROUGH RETROGRADING OVER SOUTHERN CANADA. FOR NOW...MODELS SHOW THIS SYSTEM MOVING ACROSS ON FRIDAY BUT LOTS OF VARIATIONS ARE SURE TO COME. CURRENT FORECAST OF MAINTAINING CHANCE OF PRECIP THURSDAY THROUGH SATURDAY BEST WAY TO HANDLE THIS AT THE PRESENT TIME. OVERALL...LOOKS LIKE A COOL AND UNSETTLED WEEK AHEAD. && .BOU...WINTER WEATHER ADVISORY LATE TODAY AND TONIGHT ZONES 34..37. && ET/BARJENBRUCH
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE DENVER CO 1112 AM MDT SUN APR 24 2005 COZ030>051-251200- 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- 1112 AM MDT SUN APR 24 2005 THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHEAST AND NORTH CENTRAL COLORADO. .DAY ONE...TODAY AND TONIGHT THE LATEST STORM IS CURRENTLY BRING SNOW AND RAIN TO THE FORECAST AREA. SNOW IS EXPECTED OVER THE MOUNTAINS AND FOOTHILLS ABOVE 7000 FEET THIS AFTERNOON AND OVERNIGHT. SNOW ACCUMULATIONS OF 4 TO 8 INCHES ARE FORECAST FOR THE MOUNTAIN AND FOOTHILL AREAS ABOVE 7000 FEET THIS AFTERNOON AND TONIGHT. THE REST OF THE MOUNTAINS AND FOOTHILLS CAN EXPECTED SNOW ACCUMULATIONS TO TO 5 INCHES. THE PALMER RIDGE AND LOWER FOOTHILLS WILL SEE A SNOW AND RAIN MIX. THE PLAINS CAN EXPECTED RAIN WITH THE BEST CHANCES OVER THE URBAN CORRIDOR SOUTHEASTWARD THROUGH THE LIMON AREA. THE NORTHEAST CORNER CAN EXPECTED SCATTERED RAIN SHOWERS. DECENT RAINFALL AMOUNTS... POSSIBLY UP TO INCH ARE EXPECTED OVER THE URBAN CORRIDOR SOUTH OF BOULDER. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY MOUNTAIN SNOWFALL IS EXPECTED TO DIMINISH RATHER QUICKLY MONDAY MORNING AS THE STORM SYSTEM WEAKENS AND EXITS THE AREA. ON THE PLAINS...ONLY ISOLATED TO SCATTERED RAIN SHOWERS WILL BE LEFT IN THE STORMS WAKE. A COOL PERIOD WITH A THREAT OF SHOWERS IS EXPECTED FROM WEDNESDAY THROUGH SATURDAY. AT THIS TIME...IT LOOKS LIKE THE BEST CHANCE OF PRECIPITATION WILL OCCUR DURING THE LATTER PORTIONS OF THE WEEK. RAIN CAN BE ANTICIPATED ON THE PLAINS WHILE MOSTLY SNOW WILL OCCUR IN THE MOUNTAINS. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED TODAY OR TONIGHT.
The national radar mosaic for the moment the first event began.
5 winter storm. Local standard time, as filed.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Colorado in 2005Every state in 2005This day in weather historyWarnings in Colorado, April 2005
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: 5445505, 5445506, 5445507, 5445508, 5445509.