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 Jul 6, 12:45 PM MST, 3 hours 25 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE DENVER CO 145 PM MDT TUE JUL 6 2004 .SHORT TERM...ATM BCMG DRIER AND INCRLY SUBSIDENT THIS AFTN. SO FAR...A PALTRY BATCH OF CUMULUS IS DVLPG ACRS THE HIGH COUNTRY...BUT OTWS...SKIES ARE CLEAR. FAR ERN PLAIN ARE HANGING ON TO SOME LWR 50S DWPTS...BUT STG INVERSIONS AT H7 AND AT H5 ARE EFFECTIVELY CAPPING ATMOSPHERE. WL RMV ALL POPS FM FOR THIS EVENING. OVERNIGHT ...WITH CLEAR SKIES AND DRIER AIR...TEMPS SHOULD DROP INTO THE 30S IN THE MTNS AND UPR 40S TO LWR 50S ON THE PLAINS. TMRW...THE REAL WARMUP COMMENCES AS HIGH PRESSURE AT THE SFC AND ALF BLDS INTO THE DISTRICT. STG INVERSION COUPLED WITH AN AIRMASS DEVOID OF ANY MSTR WL RESULT IN MOSTLY CLEAR SKIES THROUGHOUT THE DAY WED. WL REMOVE ALL POPS FOR TOMORROW. ONLY QUESTION REMAINS IS HOW HOT WILL IT GET...GDNC NUMBERS THIS AFTN ALL IN THE LWR 90S. WL KEEP OFFICIAL DENVER SITE AT DIA IN THE UPR 80S...BUT 90S WL BE COMMON IN THE FNT RANGE NR THE FTHILLS. THE PLAINS WILL RMN IN THE LWR TO MID 80S WITH THE WK NWLY FLOW NR THE SFC. .LONG TERM DISCUSSION...MODELS STILL SHOWING A DOME OF VERY WARM AND STABLE AIR RIDGING OVER THE AREA ON THURSDAY. TEMP GRIDS OFF THE ETA AND GFS SHOW 700 MB TEMPS RISING TO AROUND +17C OVER DENVER...WHICH WOULD EQUATE TO A MAX READING AROUND 90. MODEL SOUNDINGS SHOW VERY DRY AIR BELOW 500 MBS FOR MUCH OF THE DAY. HOWEVER ABOVE 500 MBS ATMOSPHERE MOISTENS DURING THE AFTERNOON AS SUBTROPICAL MOISTURE BEGINS STREAMING IN FROM THE DESERT SOUTHWEST. SHOULD SEE CONVECTIVE CONDENSATION LEVELS LOWERING IN THE MTNS DURING THE AFTERNOON WITH THIS INFLUX OF MOISTURE AND WITH STRONG HEATING SHOULD SEE ISOLATED T-STORMS FIRING AT LEAST BY MID-AFTERNOON. GFS AND ETA BOTH SHOW THIS MOIST/UNSTABLE AIR CONTINUING TO STREAM NEWRD OVER THE AREA ON FRIDAY FROM A LARGE PLUME OF TROPICAL MOISTURE POISED OFF THE BAJA COAST. ETA LOOKS WETTER THAN THE GFS. LOW LEVEL MOISTURE AND QPF AMOUNTS ON THE ETA MAYBE A BIT OVERDONE EAST OF THE MTNS BOTH THURSDAY AND FRIDAY. SOUTHWESTERLY FLOW WOULD FAVOR PRECIP/ CONVECTIVE INITIATION IN THE MTNS. STILL...MODELS SHOW A SHORT WAVE EJECTING NEWRD OUT OF THE DESERT SOUTHWEST AND ACROSS THE FCST AREA LATE ON THURSDAY. FEATURE LOOKS STRONGER ON THE ETA...POSSIBLY ACCOUNTING FOR THE GREATER QPF VALUES FM THE MODEL. SEE THE CHANCE FOR MEASURABLE PRECIPITATION INCHING UP EAST OF THE MTNS ON FRIDAY WITH THE COMBINATION OF UPSLOPE FLOW FOLLOWING PASSAGE OF A WEAK SFC COLD FRONT EARLY. COOLING ALOFT AND THE EXPECTED INCREASE IN CLOUD COVER WILL PROBABLY RESULT IN A COOL DOWN OF SEVERAL DEGREES FRIDAY. MOS GUIDANCE OF A COUPLE DAY AGO MAY HAVE HAD A BETTER HANDLE ON THE COOL DOWN FRIDAY WHEN IT WAS INDICATING MAX TEMPS IN THE UPPER 70S ON THE PLAINS. BEYOND FRIDAY...SOUTHWESTERLY FLOW ALOFT MAY USHER IN DRIER AIR FROM THE LOWER GREAT BASIN SHOULD THE WESTERN TROUGH NOT DIG AS FAR SOUTH AS A COUPLE OF THE MODELS SUGGEST...OR IT MAY CONTINUE TO TRANSPORT WAVES OF MOIST/UNSTABLE AIR UP FROM THE DESERT SOUTHWEST. GFS MOS GUIDANCE REFLECTS THE WARMER/DRIER SCENARIO WITH TEMPS RISING AND POPS LOWERING OVER THE WEEKEND. GFS SHOWS THE SOUTHWEST CONVEYOR BELT OF SUBTROPICAL AIR SUPPRESSING SOUTHWARD AWAY FM THE AREA ON SATURDAY AS THE FLOW ALOFT SUPPOSEDLY BECOMES MORE WESTERLY. GFS MOS RETURNS MAX TEMPS TO THE UPPER 80S AND LOWER 90S ON THE PLAINS SATURDAY AND SUNDAY...AND BY EARLY NEXT WEEK GFS SHOWS EVEN MORE DRYING AS AN UPPER RIDGE EXPANDS WESTWARD OVER THE AREA. WON/T BITE OFF ON ALL THIS YET...SO WILL MAKE ONLY MINOR ADJUSTMENTS TO THE FCST BEYOND FRIDAY. && .BOU WATCHES/WARNINGS/ADVISORIES...NONE. && 046/BAKER
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE DENVER CO 1057 AM MDT TUE JUL 06 2004 COZ030>051-071200- 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- 1057 AM MDT TUE JUL 06 2004 THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHEAST AND NORTH CENTRAL COLORADO. .DAY ONE...TODAY AND TONIGHT ISOLATED AFTERNOON AND EVENING THUNDERSTORMS WILL BE POSSIBLE... MAINLY SOUTH OF DENVER AND SOUTH OF I-70 IN THE MOUNTAINS. DUE TO A STABLE ATMOSPHERE...NONE OF THE STORMS ARE EXPECTED TO BE SEVERE TODAY. .DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY DRY AND WARMER CONDITIONS SPREAD ACROSS THE OUTLOOK AREA WEDNESDAY INTO THURSDAY AS A HIGH PRESSURE RIDGE MOVES EAST ACROSS THE STATE. LATE DAY THUNDERSTORMS WILL BE FEW AND FAR BETWEEN...MAINLY OVER THE HIGHER ELEVATIONS. THURSDAY NIGHT INTO FRIDAY...MOIST AND UNSTABLE AIR IS EXPECTED TO FLOW IN FROM THE DESERT SOUTHWEST INCREASING THE CHANCE FOR AFTERNOON AND EVENING SHOWERS AND THUNDERSTORMS ACROSS THE AREA. A FEW LATE STORMS ON THE PLAINS MAY BECOME SEVERE AS A WEAK COLD FRONT SLIDES THROUGH THE AREA. SATURDAY THROUGH MONDAY... THERE WILL BE A SLIGHT RISK OF THUNDERSTORMS EACH DAY AS THE ATMOSPHERE IS EXPECTED TO REMAIN RELATIVELY MOIST AND UNSTABLE. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED TODAY OR TONIGHT. 46/BAKER
The Cheyenne radar (KCYS), 75 km away, was scanning. The volume nearest the first event began at 23:06 UTC.
1 lightning. Local standard time, as filed.
Lightning struck a home under construction. The bolt shattered some dry wall, broke a smoke detector, blew out some wall sockets, and sparked a small fire.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Colorado in 2004Every state in 2004This day in weather historyWarnings in Colorado, July 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: 5420256.