14 hail, 7 tornado, 4 thunderstorm wind, 1 lightning, as filed by the National Weather Service.
Every event with a place to put it; 1 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 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 15, 1:45 AM MST, 10 hours 15 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE DENVER CO 245 AM MDT TUE JUN 15 2004 .SHORT TERM...TDA-TNGT...MDLS MOVE A SHT WV OF THE DAY ACRS CNTRL RCKYS. THIS ALG WITH UPSLP FLO OVR HI PLAINS WILL DESTABILIZE THE AIR MASS AND PRODUCE CONVECTIVE DVLPMNT. MESOETA UPR AIR SOUNDING SHWS SFC BASED CAPES OF 600-700J/KG OVR MTNS AND ALONG URBAN CORRIDOR LATE THIS AFTN. FARTHER EAST ON THE PLAINS THE AIR MASS WILL REMAIN CAPPED UNTIL EARLY EVE. WILL SPREAD ISOLD TSTMS OFF FOOTHILLS OVER URBAN CORRIDOR THIS AFTN THEN INCREASE POPS TO SCT THIS EVE EVERY WHERE E OF MTNS. ADEQUATE SHEAR WILL BE PRESENT THAT ONE OR TWO STORMS MAY BECOME SVR THIS EVE. MAIN SURGE OF HI PRES ON PLAINS WILL BE DELAYED TIL BFR DAYBREAK...BUT THIS MAY PRODUCE SCT RAIN SHOWERS. TEMPS WILL BE COOLER THAN YESTERDAY. WILL GENERALLY COMPROMISE WITH MOS TEMP GUIDANCE. .LONG TERM DISCUSSION...A WEAK WESTERLY FLOW ALOFT IS EXPECTED TO CONTINUE OVER THE REGION THROUGH THE PERIOD. NOT MUCH IN THE WAY OF FORCING ALOFT WITH FAIRLY STABLE MID LEVEL LAPSE RATES EXPECTED. A SERIES OF UPPER LEVEL SYSTEM NORTH OF THE STATE...WILL USHER IN UNSEASONABLY COOL CONDITIONS. THE FIRST FRONT WL MOVE INTO NORTHEAST COLORADO ON WEDNESDAY. THE ETA BUFFER SOUNDINGS INDICATE UPSLOPE CONDITIONS UP TO AROUND 760 MB...WITH VERY STABLE CONDITIONS CAPPING THUNDERSTORMS DEVELOPMENT. EAST OF THE DIVIDE...MOST OF THE UPSLOPE PCPN SHOULD BE STRATIFORM. IF ANY THUNDERSTORMS OCCUR...THEY WILL BE ELEVATED AND LIKELY WEST OF THE CONTINENTAL DIVIDE. GUIDANCE SHOWS TEMPERATURES MAY STRUGGLE TO REACH THE 60 DEGREE MARK ON WEDNESDAY. BY THURSDAY...THE AMS REMAIN FAIRLY STABLE WITH SLIGHTLY WARMER TEMPERATURES EXPECTED AS THE LOW LEVEL FLOW BECOMING SELY... AND POSSIBLE DENVER CYCLONE FORMS. THIS MAY HELP DEVELOP SOME THUNDERSTORMS ESPECIALLY OVR THE PALMER DIVIDE AREA ON THURSDAY. AS FOR FRIDAY...THE AVN APPEARS TO SLOW DOWN THE ONSET OF THE NEXT COLD FRONT LATE FRIDAY AFTERNOON OR FRIDAY NIGHT. SEE NO REASON TO CHANGE MUCH BEYOND FRIDAY AT THIS TIME. && .BOU WATCHES/WARNINGS/ADVISORIES...NONE. GARD/COOPER
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE DENVER CO 1101 AM MDT TUE JUN 15 2004 COZ030>051-161200- 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 TUE JUN 15 2004 THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHEAST AND NORTH CENTRAL COLORADO. .DAY ONE...TODAY AND TONIGHT SEVERE THUNDERSTORMS ARE POSSIBLE ACROSS THE NORTHEAST PLAINS OF COLORADO THIS AFTERNOON AND EVENING. MOISTURE AND INSTABILITY HAVE INCREASED SIGNIFICANTLY ACROSS THE NORTHEAST PLAINS OF COLORADO THIS MORNING. WITH CONTINUED DAYTIME HEATING...SCATTERED THUNDERSTORMS WILL BE DEVELOPING BY MID AFTERNOON. ONCE THE STORMS DEVELOP...SOME OF THEM WILL QUICKLY BECOME SEVERE AND PRODUCE LARGE HAIL AND DAMAGING WINDS. HEAVY RAINFALL AND FLASH FLOODING MAY ALSO ACCOMPANY THE STRONGER STORMS. AT THIS TIME...THE HIGHEST THREAT OF SEVERE THUNDERSTORMS IS EAST OF A LINE FROM STERLING TO FORT MORGAN TO KIOWA. HOWEVER...AN ISOLATED SEVERE THUNDERSTORM CAN NOT BE RULED OUT FARTHER WEST INCLUDING THE I-25 URBAN CORRIDOR. IN THE MOUNTAINS...THUNDERSTORM COVERAGE WILL BE LESS WIDESPREAD AND RAINFALL AMOUNTS WILL BE LIGHTER. .DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY UNSEASONABLY COOL AND STABLE CONDITIONS SHOULD HINDER THE FORMATION OF THUNDERSTORMS ON THE PLAINS WEDNESDAY THROUGH MONDAY. HOWEVER ENOUGH MOISTURE WILL BE AVAILABLE FOR AT LEAST A SLIGHT CHANCE OF SHOWERS EACH DAY. IN THE MOUNTAINS AND FOOTHILLS...EXPECTED ISOLATED AFTERNOON AND EVENING THUNDERSTORMS EACH DAY WHERE THE ATMOSPHERE SHOULD REMAIN RELATIVELY WARM AND UNSTABLE. GUSTY WINDS AND LIGHTNING WILL BE THE MAIN THREAT FROM THESE STORMS. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL LIKELY BE REQUIRED ACROSS THE NORTHEAST PLAINS BEFORE 2 PM. BARJENBRUCH/BAKER
The Denver radar (KFTG), 125 km away, was scanning. The volume nearest the first event began at 20:38 UTC.
14 hail, 7 tornado, 4 thunderstorm wind, 1 lightning. Local standard time, as filed.
A man was hit by lightning as he ascended to the summit of Mt. Lincoln. The man was knocked unconcious for approximately 20 minutes. He suffered a ruptured ear drum as well as second and third degree burns.
A tornado touched down briefly, blowing the roof off a machine shop.
A small tornado trouhed down briefly but did no damage.
A tornado touched down causing roof damage to a home and destroyed a barn. Two other barns on nearby properties were extensively damaged. Significant tree damage was also reported.
A small tornado touched down but did no damage.
A small tornado touched down but did no damage.
A small tornado touched down but did no damage.
A small tornado touched down but did no damage.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Colorado in 2004Every state in 2004This day in weather historyThe tornado archive for Colorado, 2004Warnings in Colorado, June 2004
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: 5402096, 5402011, 5402012, 5402073, 5402074, 5402075, 5402076, 5402077, 5402079, 5402078, 5402080, 5402081, 5402082, 5402083, 5402084, 5402085, 5402086, 5402087, 5402088, 5402089, 5402090, 5402091, 5402092, 5402093, 5402094, 5402095.