13 thunderstorm wind, 1 lightning, 1 hail, 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 May 22, 3:00 AM MST, 10 hours 45 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE DENVER CO 400 AM MDT MON MAY 22 2006 ...CORRECTION TO WATCH/WARNING/ADVISORY HIGHLIGHTS... .SHORT TERM DISCUSSION...CURRENT CONVECTIVE COMPLEX CONTINUES TO SHIFT NORTHEAST...WITH THE STRONGEST STORMS NOW IN YUMA COUNTY WITH JUST LIGHT RAIN SHOWERS LEFT ACROSS THE NERN CORNER OF CO. RESULT OF THIS OVERNIGHT CONVECTION HAS BEEN AN INCREASE IN LOW LVL MSTR ACROSS THE NORTHEAST PLAINS WITH SFC DEWPOINTS NOW IN THE LOWER TO MID 50S. STILL WAITING TO SEEN AN INCREASE IN DEWPOINTS FURTHER WEST. EXPECT MSTR LVLS TO SLOWLY INCREASE ACROSS THE FRONT RANGE TOWARDS DAYBREAK WITH DEWPOINTS RAISING IN THE MID AND UPPER 40S. CURRENT FCST NAM DEWPOINTS SEEM TOO HIGH WITH 50S OVER THE FRONT RANGE AND 60S FURTHER EAST DURING THE DAY. SHOULD BE ABLE TO HOLD THE LOW LVL MSTR TODAY AS OVERALL MSTR VALUES HAVE INCREASED WITH INTEGRATED PW VALUES AT GJT NOW ALMOST AT 3/4 OF AN INCH. MAIN CONCERN TODAY IS POTENTIAL SEVERE WEATHER OUTBREAK ACROSS MUCH OF NORTHEAST COLORADO THIS AFTERNOON AND EVENING. MAIN CULPRIT IS STRONG NEG TILTED TROF NOW COMING ONSHORE ACROSS SRN CA. THE LOW WILL RAPIDLY MOVE TOWARDS THE 4 CORNERS REGION BY 00Z TUE AND THEN OVER THE FRONT RANGE TOWARDS 12Z TUE. FAIRLY DECENT ASCENT NOTED FROM QG VERTICAL VEL FIELDS BY LATER THIS AFTN AND TNT WHILE 70KT JET CORE LIFTS ACROSS NERN CO BY LATER TNT. MID LVL FLOW ALSO INCREASES TODAY WITH SPEEDS OF 35-40KT WHILE LOW LVL FLOW INCREASES FROM THE S-SE. FCST SOUNDINGS INDICATE CAPE VALUES AROUND 1500J/KG OVER THE URBAN CORRIDOR AND INCREASES TO OVER 2000J/KG FURTHER EASTWARD. ABOVE FACTORS CONDUCIVE TO SOME STORMS BECOMING SEVERE WITH SUPERCELL CHARACTERISTICS. SPC ALSO HAS ALL OF NERN CO IN SLIGHT CHC OF SEVERE TODAY AND THIS LOOKS GOOD. THE STRONGEST STORMS WILL BE EAST OF THE URBAN CORRIDOR IN THE RICHER MOISTURE...WITH THE POTENTIAL FOR LARGE HAIL(UP TO 2 DIAMATER) AND DAMAGING WINDS. HOWEVER...EVEN OVER THE URBAN CORRIDOR EXPECT A FEW SEVERE STORMS AS WELL. GIVEN THE THE STRONG SERLY LOW LVL FLOW EXPECT EVEN A FEW TORNADOES AS WELL. .LONG TERM DISCUSSION...MODEL FAMILY SLOW TO LIFT THE AFOREMENTIONED UPR AIR SYSTEM OUT OF THE AREA ON TUESDAY. SO HAD TO DELAY END OF PCPN AND CLEARING TUESDAY MORNING. EARLIER APPEARED THAT RED FLAG CONDITIONS WOULD DEVELOP BY AT LATE TUE MORNING IN THE FRONT RANGE FOOTHILLS AND ACROSS THE NORTHEAST PLAINS AND SOUTH PARK WITH DVLPMENT OF STG AND GUSTY W/NWLY WINDS AND WITH SIGNIFICANT DRYING ON BACK SIDE OF EJECTING SHORTWAVE TROUGH. NOW APPEARS WRAP AROUND MOISTURE WILL HOLD SFC DEWPOINTS AAS WELL AS SUPPORT ISOLATED/WDLY SCATTERED SHOWERS/T-STORMS...PARTICULARLY IN AREAS EAST OF A GREELEY TO LIMON LINE FOR GOOD PART OF THE DAY. STG AND MOIST NWLY FLOW SHOULD ALSO CONTINUE TO PRODUCE OROGRAPHIC RAIN/SNOW SHOWERS IN THE MTNS THROUGHOUT THE DAY WITH SNOW LEVELS DOWN AROUND 10K FEET IN THE MORNING WITH 700 MB TEMP AROUND 0C. ALTHOUGH ANY ACCUMULATIONS SHOULD BE MINIMAL. BY AFTERNOON...UPR LOW LIFTS OUT WHICH ALLOWS DRIER NWLY FLOW TO MIX DOWN TO THE SFC ALONG AND EAST OF THE FRONT RANGE. THUS COULD SEE SFC DEWPOINTS LOWERING INTO THE TEENS AFTER 18Z IN THESE AREAS. W/NWLY WND GUSTS TO AROUND 30 MPH ALSO POSSIBLE BY MIDDAY WITH HIGHER GUSTS IN THE FOOTHILLS. FOR THAT REASON WILL ISSUE A FIRE WEATHER WATCH FOR FIREWEATHER ZONES 214..215..216.. 238..239..240..241..243..245..246 AND 247. WATCH WILL BEGIN AT 18Z/TUE AND RUN TO 01Z/WED. WEDNESDAY AND BEYOND...AREA COMES UNDER INFLUENCE OF FLAT UPR RIDGE. AIRMASS CONTINUES TO DRY BUT WINDS SFC AND ALOFT WEAKEN. SO EVEN THOUGH TEMPS WARM AND RHS DECREASE...WIND SPDS REMAIN BELOW FIRE WEATHER CRITERIA. SEE LITTLE CHANGE THROUGH REMAINDER OF EXTENDED WITH WARMEST TEMP READINGS FRIDAY AND SATURDAY. THEN A GRADUAL COOL SUNDAY AND MONDAY AS DEEP UPR LEVEL TROUGH SLOWLY MOVES IN FROM THE WEST. && .BOU WATCHES/WARNINGS/ADVISORIES...FIREWEATHER WATCH TUE AFTERNOON AND EARLY EVENING FOR THE FRONT RANGE FOOTHILLS...I-25 URBAN CORRIDOR...SOUTH PARK AND PALMER DIVIDE FROM 18Z/TUE TO 01Z/WED. FW ZONES IN WATCH: 214..215..216..238..239..240..241..243..245..246 AND 247. && ENTREKIN/BAKER
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE DENVER CO 1036 AM MDT MON MAY 22 2006 COZ030>051-231200- 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- 1036 AM MDT MON MAY 22 2006 ...POTENTIAL SEVERE WEATHER OUTBREAK ACROSS EASTERN COLORADO THIS AFTERNOON AND EVENING AND FIRE WEATHER WATCH IN EFFECT FOR TUESDAY AFTERNOON AND EVENING FOR PARTS OF NORTHEAST COLORADO... THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHEAST AND NORTH CENTRAL COLORADO. .DAY ONE...TODAY AND TONIGHT SEVERE WEATHER IS EXPECTED OVER NORTHEAST COLORADO THIS AFTERNOON AND EVENING. THE THREAT LOOKS HIGHEST OVER THE NORTHEAST PLAINS OF WASHINGTON...LOGAN...SEDGWICK AND PHILLIPS COUNTIES WHERE HEATING HAS BEEN STRONGEST AND DEWPOINTS ARE THE HIGHEST. THERE MAY BE TOO MUCH CLOUDINESS OVER THE PALMER DIVIDE AND URBAN CORRIDOR TO ALLOW TEMPERATURES TO CLIMB ENOUGH TO PRODUCE SIGNIFICANT SEVERE WEATHER. SCATTERED THUNDERSTORMS WILL DEVELOP OVER THE MOUNTAINS AND HIGH VALLEYS AROUND NOON...THEN SPREAD ACROSS THE EASTERN PLAINS THIS AFTERNOON. IN NORTHEAST COLORADO SOME STORMS WILL BECOME SEVERE BY MID AFTERNOON WITH THE POTENTIAL TO PRODUCE HAIL UP TO 2 INCHES IN DIAMETER...DAMAGING WINDS AND EVEN AN ISOLATED TORNADO. ACROSS THE FRONT RANGE FOOTHILLS AND URBAN CORRIDOR...STORMS MAY PRODUCE PENNY SIZED HAIL AND STRONG WINDS. A MOIST AND UNSTABLE AIRMASS IN NORTHEAST COLORADO WILL ALSO RECEIVE SOME LIFT AHEAD OF A STRONG DISTURBANCE THAT WILL RAPIDLY APPROACH THE 4 CORNERS REGION BY THIS EVENING. THE STORMS WILL DECREASE FROM WEST TO EAST LATER TONIGHT AS THE SEVERE THREAT SHIFTS FURTHER EASTWARD INTO THE CENTRAL PLAINS. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY A FIRE WEATHER WATCH REMAINS IN EFFECT FOR THE FRONT RANGE FOOTHILLS ...THE ADJACENT HIGH PLAINS INCLUDING THE GREATER DENVER METRO AREA ...THE PALMER DIVIDE AREA AND SOUTH PARK. THIS WATCH IS IN EFFECT FOR TUESDAY AFTERNOON AND EARLY EVENING. GUSTY WEST TO NORTHWEST WINDS AND VERY LOW RELATIVE HUMIDITIES ARE THE PRIMARY REASONS FOR THIS WATCH. THESE CRITICAL FIRE WEATHER CONDITIONS ARE POSSIBLE FOLLOWING THE PASSAGE OF RATHER POTENT WEATHER DISTURBANCE. THIS SYSTEM IS EXPECTED TO EXIT THE AREA DURING THE DAY TUESDAY. OTHERWISE EXPECT DRIER AND WARMER CONDITIONS TO SPREAD ACROSS THE OUTLOOK AREA DURING THE LATTER HALF OF THE WEEK AS HIGH PRESSURE AS THE SURFACE AND ALOFT MOVES OVER THE STATE. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE NEEDED AFTER 2 PM THIS AFTERNOON. GLANCY/COOPER
The Denver radar (KFTG), 64 km away, was scanning. The volume nearest the first event began at 02:42 UTC.
13 thunderstorm wind, 1 lightning, 1 hail. Local standard time, as filed.
A lightning strike sparked a fire at a recreation center in Evergreen. The roof of the building was damaged. In addition, the small fire that was ignited also spread into some brush. The ensuing brush fire consumed about one quarter of an acre.
Strong thunderstorm winds blew away the roof and the back wall of a barn.
Strong thunderstorm winds toppled an 1800 lb. fuel tank. The roof of a shed was also blown off the structure.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Colorado in 2006Every state in 2006This day in weather historyWarnings in Colorado, May 2006
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: 5505333, 5505330, 5505331, 5505329, 5505328, 5505332, 5505327, 5505326, 5505324, 5505325, 5505323, 5505322, 5505321, 5505320, 5505319.