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 1, 1:25 PM MST, 4 hours 20 minutes earlier.
NORTHEAST AND NORTH CENTRAL COLORADO AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE DENVER COLORADO 225 PM MDT SAT JUN 01 2002 SHORT TERM DISCUSSION: RADAR AND SFC ANALYSIS SHOW SOME TYPE OF SFC LOW OVR ERN ADAMS AND ARAPAHOE COUNTIES WITH SOME TYPE OF WK BNDRY EXTENDING FM GXY TO NR AKO INTO SWRN NE. SFC BASED CAPES HAVE RISEN TO AROUND 2000 J/KG OVR THE NERN CO MAINLY EAST OF A STERLING TO AKO LN. HI BASED STORMS HAVE BEEN DVLPG NR INTERSECTION OF SFC LOW...DRYLINE AND WK FNTL BNDRY. AS THESE STORMS MOVE INTO MORE UNSTABLE AIR OVR NERN CORNER COULD SEE A FEW SVR STORMS WITH LARGE HAIL AND STG WNDS. MEANWHILE MID AND HI LVL MSTR IS INCRG IN ADVANCE OF DISTRURBANCE MOVING ACRS UTAH THIS AFTN. THIS IS LEADING TO ADDITIONAL HI BASED SHRA AND TSRA DEVELOPMENT IN THE MTNS WHICH WL LINGER INTO THE EVENING HRS. FOR SUN APPEARS TO BE ANOTHER HOT AND DRY DAY OVR NRN CO WITH ANOTHER RECORD HIGH IN DENVER PSBL AS 700 MB TEMPS REMAIN AOA 15 DEGREES C. MSTR WL BE VERY LIMITED SO DONT THINK THERE WL BE MUCH ACTIVITY IN THE MTNS OR NERN CO. MESO-ETA IS SHOWING SOME TYPE OF BNDRY OVR THE NERN CORNER INITIALLY APPARENTLY IN RESPONSE TO MCS DEVELOPMENT OVR NEBRASKA TONIGHT. HOWEVER THIS FEATURE IS FCST TO GRADUALLY WASH OUT BY AFTN BUT IF IT DOES MAINTAIN ITSELF ENOUGH LOW LVL MSTR MY EXIST FOR A FEW LATE AFTN AND EVENING STORMS. LONGER TERM DISCUSSION: MAIN CHALLENGE FOR MON AND TUE WL BE HOW UPR LVL TROF DVLPS OVR RGN. THERE IS SOME MAJOR DISAGREEMENT BETWEEN THE MODELS ON HOW TO HANDLE THIS SYSTEM. ETA...NGM...NOGAPS AND EUROPEAN ALL SHOW AN UPR LVL LOW DVLPG OVR SWRN US BY MON WHILE AVN KEEPS SYSTEM PROGRESSIVE AND RATHER DISORGANIZED WITH BRUNT OF UPR LVL TROF MOVING ACRS CNTRL AND NRN ROCKIES. WITH 4 OUT OF 5 MODELS SHOWING MORE ENERGY IN SRN BRANCH OF TROF WL TREND FCST TOWARDS ETA...NGM...NOGAPS AND EUROPEAN SOLUTIONS. MEANWHILE A FAIRLY STG CDFNT WL MOVE INTO NERN CO BY 12Z MON AND BRING MUCH COOLER TEMPS ALONG WITHG INCRG UPSLOPE FLOW AND LOW LVL MSTR. IF LOW CLOUDS BURN OFF BY MIDDAY APPEARS ENOUGH WARMING WL TAKE PLACE TO ALLOW FOR TSTMS TO DVLP NR THE FOOTHILLS BY MID TO LATE AFTN. GRIDDED FIELDS ALSO SHOW SOME MINOR MID-LVL QG ASCENT AND FAVORABLE UPR LVL DIVERGENCE TO ENHANCE PCPN CHCS AS WELL. SOUNDINGS SHOW SFC BASED CAPES COULD REACH AROUND 2000 J/KG BY MON AFTN IF TEMPS CAN WRM INTO THE LOWER TO MID 70S WITH GOOD TURNING IN THE LOWER LEVELS AS STRM RELATIVE HELICITIES ARE FCST AROUND 150 M2/S2. THUS COULD SEE 1ST SIGNIFICANT SVR WX OUTBREAK OF THE SEASON OVR NERN CO IF ENOUGH WARMING OCCURS AT THE SFC. 700 MB TEMPS ARE FCST TO COOL ABOUT 8-10 DEGREES C SO TEMPS WL BE AT LEAST 20 DEGREES COOLER OVR NERN CO INTO THE FOOTHILLS. BY MON NGT AND TUE LATEST UPSLOPE FLOW WL CONT AS SFC HI PRES BUILDS S INTO NRN CO. THIS COULD LEAD TO MORE OF A GENERAL RAIN EVENT MON NGT INTO TUE DEPENDING ON HOW UPR LVL TROF DVLPS AS ETA EXTENSION THRU 84 HRS SHOWS QUITE A BIT OF PCPN ACRS NRN CO. FOR NOW WL JUST GO WITH CHC POPS MON NGT INTO TUE SINCE STILL NOT SURE WHICH MODEL WL BE CORRECT. 700 MB TEMPS ARE FCST TO DROP TO ROUND 0 DEGREES C ON TUE ACCORDING TO LATEST AVN WHICH WOULD KEEP TEMPS IN THE 50S ACRS NERN CO FOR AFTN HIGHS. COULD SEE SOME RAIN MIX WITH SNOW IN THE HIGHER MTNS AND FOOTHILLS MAINLY ABV 9,000 FT. BY WED IF I BELIEVE THE NOGAPS AND EUROPEAN SOLUTIONS UPR LVL LOW WL RETROGRADE SW TOWARDS BAJA AS SFC HI BUILDS ACRS CO ALLOWING FOR BEST MSTR TO SAG SOUTH OF AREA. 700 MB TEMPS ARE ONLY FCST ARE +2 OR +3 BY WED AFTN WHICH COULD KEEP HIGHS IN THE 60S ACRS NERN CO. FOR THU THRU SAT LAST NIGHTS AVN SHOWED FLOW ALOFT BECOMING MORE ZONAL WITH A GENERAL WARMING TREND. SINCE WE ARE NOW IN THE MONTH OF JUNE PROBABLY WL START SEEING SOME WDLY SCT AFTN AND EVENING CONVECTION AS IT DOESNT TAKE MUCH MSTR TO GET THINGS GOING SO WL INTRODUCE A SLIGHT CHC OF STORMS FOR SAT AND SUN. KLEYLA .DEN...NONE
COZ030>051-012100- HAZARDOUS WEATHER OUTLOOK FOR NORTHEAST AND NORTH CENTRAL COLORADO NATIONAL WEATHER SERVICE DENVER COLORADO 115 PM MDT SAT JUN 1 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: HIGH LEVEL MOISTURE...ASSOCIATED WITH A WEAK UPPER LEVEL DISTURBANCE...WILL LINGER NORTH OF LINE FROM DENVER TO LAST CHANCE. ALONG AND SOUTH OF THIS LINE...AS WELL AS WEST OVER THE MOUNTAINS AND FOOTHILLS... ISOLATED SHOWERS AND THUNDERSTORMS WERE ALREADY DEVELOPING EARLY THIS AFTERNOON. THESE STORMS WILL BE HIGH BASED...CAPABLE OF PRODUCING WIND GUSTS TO 45 MPH BUT VERY LITTLE RAINFALL. A MOIST POOL OF LOW LEVEL MOISTURE WILL LINGER IN THE NORTHEAST PLAINS...MAINLY EAST OF A LINE EXTENDING FROM HEREFORD IN NORTHEAST WELD COUNTY TO FORT MORGAN TO COPE IN SOUTHEAST WASHINGTON COUNTY UNTIL 3 PM...THEN SHIFT TO THE NORTHEAST. THE BEST POTENTIAL FOR STRONG OR POSSIBLY SEVERE THUNDERSTORMS WILL BE IN THIS AREA. THIS AIRMASS HAS BEEN CAPPED EARLY THIS AFTERNOON. OUTFLOW BOUNDARIES ASSOCIATED WITH THUNDERSTORMS ELSEWHERE HOWEVER MAY TRIGGER STORMS THERE THIS AFTERNOON...BEFORE DRIER LOW LEVEL AIR INTRUDES FROM THE SOUTHWEST. IF SEVERE THUNDERSTORM DO DEVELOP...DAMAGING MICROBURST WINDS AND LARGE HAIL WILL BE THE PRIMARILY THREATS. SINCE ONLY ISOLATED SEVERE THUNDERSTORMS ARE POSSIBLE...SPOTTER ACTIVATION IS NOT ANTICIPATED AT THIS TIME. COOPER
The Cheyenne radar (KCYS), 75 km away, was scanning. The volume nearest the first event began at 00:43 UTC.
1 lightning. Local standard time, as filed.
A farmer was struck by lightning while standing on hay bales. The 39-year old man suffered minor injuries.
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, June 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: 5305039.