11 hail, 4 thunderstorm wind, 2 flash flood, as filed by the National Weather Service.
Every event with a place to put it; 2 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 3, 2:49 AM MST, 10 hours 11 minutes earlier.
NORTHEAST AND NORTH CENTRAL COLORADO AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE DENVER COLORADO 345 AM MDT WED JUL 03 2002 SHORT TERM DISCUSSION: EACH DAY FOR THE PAST 3 DAYS THE CONVECTION HAS BEEN A LITTLE FURTHER NORTH. WITH WIND AND MOISTURE PROGS TDAY...IT LOOKS LIKE MORE OF AREA WILL FINALLY SEE SOME RELIEF FROM THE DRY HEAT. BEST CHANCE OF TSTMS WILL BE IN AND NEAR THE FOOTHILLS...PALMER DIVIDE AND URBAN CORRIDOR...BECAUSE OF SELY UPSLOPE FORCING. THIS AIRMASS HAS FAVORED EVNG CONVECTION...SO WILL BEGIN STORMS IN AFTN...BUT RAISE POPS A LITTLE THIS EVNG. LIGHT STEERING WINDS WILL RESULT AN LOCALLY HEAVY RAIN AS WE SAW LAST EVNG. THERMAL RIDGE HAS SHIFTED WWD AND WILL BE OVER MTNS TODAY. THIS WILL CAUSE MAX TEMPS TO BE A FEW DEGREES COOLER TODAY. IF TSTMS DEVELOP LATER THIS AFTN...COULD KEEP THE 90 DEGREE STREAK GOING HERE IN DENVER...IT WILL BE A CLOSE CALL. MUCH OF NORTHEAST COLORADO WILL AGAIN SEE LOW 90S TDY. TNGT...MODELS INDICATE WEAK UPWARD FORCING TONGT...SO THIS ALSO FAVORS CNVTN LATER INTO EVNG...AND PLENTY OF RESIDUAL CLDS OVNGT. DEWPOINTS WILL AGAIN INCREASE WWD ON SELY WINDS ON PLAINS LATE TNGT. RTG LONG TERM DISCUSSION: WK S/W WL HV CLRD DIST BY ELY THURS...AND ATM WL BE LRGLY DEVOID OF ANY WX FEATURES DURG THE DAY. HWVR...ATM WL STILL BE SOMEWHAT MOIST THURS AND THERMODYNAMIC INSTABILITY SHUD BE ENUF TO TRIGGER SCT TSTMS IN THE AFTN. LWR LVLS WL BE PERHAPS A LTL DRIER THAN WED SINCE THE ELY AND SELY FLOW WL HV DCRSD. THUS... CNVCTN WL INITIATE ALG THE FTHILLS THEN MOV INTO THE PLAINS. FLOW ALF NRLY ZERO THO AND STORMS SHUD BE SHORT DURATION-PULSE VARIETY. MAX TEMPS THURS SHUD BE QUITE SMLR TO WED. FRI...A VIGOROUS UPR TROF WL MOV THRU THE NRN ROCKIES WHICH WL HELP SHOVE THE RDG AXIS A BIT EWD. A WK MID LVL LOW WHICH HAS BEEN SITTING OVR ERN AZ THE PAST FEW DAYS WL MIGRATE EWD INTO NEW MEXICO. PW VALUES RISE APPRECIABLY FRI WITH DPR MSTR INVOF THIS FEATURE AND A SLGT INCR IN SLY FLOW FRI SHUD TAKE SOME OF THIS MSTR INTO OUR AREA. ATTM...SCT POPS LK OK FRI. AGAIN...MAX TEMPS SHUD STAY WITHIN A COUPLE DEGREES OF 90 LOCALLY. BY SAT...H5 AXIS IS PROGGED TO AMPLIFY AND RETROGRADE INTO WY. A DECENT LOOKING SURGE WILL THEN SPILL INTO THE NRN PLAINS DURG THE DAY SAT. THIS WL LEAD TO COOLER UPSLOPE FLOW. TEMPS SHUD RETURN INTO THE 80S. IF THE 90S STREAK IS STILL ALIVE AFTER FRI...IT WL MOST CERTAINLY BE OVER BY SAT. ATM BLO H7 WL BE MORE STBL WHICH MAY LIMIT AMT OF CONVECTION DESPITE DECENT AMTS OF MSTR. SUNDAY AND BEYOND...RDG WL CONT TO AMPLIFY INTO MT WITH ELY FLOW DVLPG TO OUR S OVR AZ AND NEW MEXICO. THIS MAY HELP STEER SOME EASTERLY WAVES INTO OUR VCNTY BY MON...BUT IT/S TOO EARLY TO TELL ATTM. MEANWHILE...QUITE A BIT OF MSTR IS PROGGED BY THE AVN TO BEGIN POOLING IN NRN MEXICO BY MON. THIS IS QUITE TYPICAL TO SEE IN THE SOUTHWEST THIS TIME OF YEAR...SO WE MAY BE SEEING SOME SIGNS OF A TRANSITION TO A WETTER PTRN. WL LV XTNDD PDS AS IS. 46 .DEN...NONE
COZ030>051-032000- HAZARDOUS WEATHER OUTLOOK FOR NORTHEAST AND NORTH CENTRAL COLORADO NATIONAL WEATHER SERVICE DENVER COLORADO 1010 AM MDT WED JUL 3 2002 THIS OUTLOOK PERTAINS TO THE FOLLOWING COLORADO COUNTIES ADAMS ARAPAHOE BOULDER BROOMFIELD CLEAR CREEK DENVER DOUGLAS ELBERT GILPIN GRAND JACKSON JEFFERSON LARIMER LINCOLN LOGAN MORGAN PARK PHILLIPS SEDGWICK SUMMIT WASHINGTON WELD SYNOPSIS: THE AIRMASS HAS BECOME MORE MOIST AND UNSTABLE DURING THE LAST 24 HOURS AS A PLUME OF MOISTURE HAS MOVED IN FROM THE SOUTH. SOUTHEASTERLY SURFACE WINDS WILL CONTINUE TO PUMP LOW LEVEL MOISTURE ACROSS THE NORTHEAST PLAINS OF COLORADO AND INTO THE FRONT RANGE FOOTHILLS AND PARK COUNTY THROUGH THE AFTERNOON AND EVENING. AS A RESULT...SCATTERED THUNDERSTORMS WILL BE DEVELOPING OVER THE FRONT RANGE EARLY THIS AFTERNOON AND THEN SPREAD AND DEVELOP EASTWARD ONTO THE PLAINS LATE THIS AFTERNOON AND EVENING. STORM MOVEMENT WILL BE VERY SLOW...SO LOCALLY HEAVY RAINFALL MAY OCCUR. STORMS WILL BE CAPABLE OF PRODUCING AN INCH OF RAIN IN A 20 TO 30 MINUTE PERIOD. IF A STRONGER STORM STALLS...SOME FLOODING PROBLEMS MAY OCCUR ESPECIALLY IN AND NEAR THE HAYMAN FIRE. WIND SHEAR IN THE ATMOSPHERE IS VERY WEAK...SO THE THREAT OF SEVERE WEATHER WILL BE LIMITED TO BRIEF AND ISOLATED OCCURRENCES. THE STRONGEST STORMS WILL PRODUCE HAIL UP TO 1 INCH IN DIAMETER AND WIND GUSTS UP TO 60 MPH. SPOTTER ACTIVATION IS NOT ANTICIPATED AT THIS TIME. OVER THE FAR NORTHEASTERN PLAINS...STORM COVERAGE WILL BE LIMITED TO ISOLATED AS A STRONGER CAP EXISTS IN THE ATMOSPHERE. THE OUTLOOK FOR THURSDAY CALLS FOR SIMILAR CONDITIONS WITH A CONTINUED CHANCE OF AFTERNOON AND NIGHTTIME SHOWER AND THUNDERSTORM ACTIVITY. BARJENBRUCH
The Denver radar (KFTG), 64 km away, was scanning. The volume nearest the first event began at 20:06 UTC.
11 hail, 4 thunderstorm wind, 2 flash flood. Local standard time, as filed.
Locally heavy rainfall in the Hayman burn area washed out a secondary road. Debris associated with the runoff, blocked a culvert, forcing the water to wash out the road.
Strong thunderstorm winds below the roofs of a barn and shed.
Heavy rain washed out a frontage road. The Mountain Ranch subdivision was also flooded.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Colorado in 2002Every state in 2002This day in weather historyWarnings in Colorado, July 2002
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: 5309941, 5309927, 5309928, 5309929, 5309930, 5309931, 5309932, 5309933, 5309934, 5309935, 5309942, 5309943, 5309936, 5309937, 5309938, 5309939, 5309940.