In Logan and Phillips Counties, severe thunderstorms produced large hail, from quarter size to golfball size. Strong winds also accompanied the storms.
Every event with a place to put it. 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 episode as NWS BOU wrote it up.
In Logan and Phillips Counties, severe thunderstorms produced large hail, from quarter size to golfball size. Strong winds also accompanied the storms. The hardest hit area was in northern Phillips County. In all, 250 farms were affected by the storms resulting in a 27% crop loss of wheat a 6.3% loss of corn. Homes were also damaged and windows broken. In Weld County, a man person was injured by lightning.
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 18, 2:30 PM MST, 4 hours earlier.
AREA FORECAST DISCUSSION...RESENT WITH SHORT TERM DISCUSSION NATIONAL WEATHER SERVICE DENVER CO 330 PM MDT THU JUN 18 2009 .SHORT TERM...STRONG T-STORM HAS FORMED OVER SEDGWICK COUNTY AT THIS HOUR. SPC HAS THIS PART OF THE STATE IDENTIFIED AS A SLIGHT RISK AREA. MAY SEE THIS CELL GOING SEVERE AT ANY TIME BEFORE EXITING THE STATE. LARGE DAMAGING HAIL BIGGEST CONCERN. OTHERWISE EYE ON THE SOUTHWEST-NORTHEAST BAND OF SHOWERS/T-STORMS MOVING ACROSS NWRN COLORADO. STORMS FIRING UNDER THE ASCENT REGION OF AN APPROACHING MID-LEVEL SHORTWAVE TROUGH. DECENT AMOUNT OF CG LIGHTNING WITH THIS LINE OF CONVECTION. AT ITS PRESENT SPEED...SHOULD SEE THIS BAND OF STORMS PASSING OVER THE N-CNTRL MTNS NEXT FEW HOURS...THEN OUT ACROSS THE NRN FRONT RANGE URBAN CORRIDOR AND ADJACENT HIGH PLAINS BY EARLY THIS EVENING. STORMS WILL PROGRESS EAST OVERNIGHT WITH A FEW POSSIBLY GOING SEVERE EAST OF A FORT COLLINS TO BURLINGTON LINE BEFORE MIDNIGHT. AGAIN LARGE HAIL MAIN SEVERE WX THREAT. DO NOT EXPECT TO SEE MUCH CONVECTION BREAKING OUT OVER SRN PORTIONS OF THE I-25 URBAN CORRIDOR AND PALMER DIVIDE AS MOISTURE CONTINUES TO DECREASE WITH ONGOING SWLY FLOW PRIOR TO TROUGH PASSAGE. MODELS SHOW THE 700-500 TROUGH AXIS MOVING EAST OF THE STATE LINE EARLY FRIDAY MORNING WITH THE FLOW ALOFT TURNING NWLY THROUGH THE MORNING. WEAK COLD FRONT SLIDING SEWRD ACROSS CENTRAL WYOMING ATTM PROGGED TO DROP SOUTH THRU NERN COLORADO EARLY FRIDAY MORNING. TEMP/WIND/PRES FIELDS INDICATE FROPA AT DENVER BETWEEN 12-15Z TOMORROW. POST FRONTAL/ TROUGH AIRMASS MUCH DRIER AND STABLE SO T-STORM CHANCES VERY LOW AT BEST AND MAINLY CONFINED TO HIGHER ELEVATIONS OF THE NRN MTNS... FRONT RANGE FTHLS AND PALMER DIVIDE MID TO LATE AFTERNOON. OTHERWISE A DRY DAY IN STORE FOR MOST OF THE CWFA WITH SFC TEMPS ONLY A COUPLE DEGS LOWER THAN THOSE OBSERVED TODAY. .LONG TERM...MODELS CONTINUE TO SHOW PRECIPITATION DEVELOPING IN MOIST WARM ADVECTION FRIDAY NIGHT INTO SATURDAY. STILL SOME QUESTION ABOUT HOW MUCH DESTABILIZATION DUE TO THE CLOUD COVER...BUT SOUNDINGS GET TO BE ALMOST SATURATED MOIST ADIABATIC ON SATURDAY SO IT MAY NOT TAKE MUCH. THE LIMITED INSTABILITY MAY JUST HAVE THE EFFECT OF KEEPING IT FROM BEING A THOROUGHLY WET DAY. FOR NOW RAISED POPS A BIT MORE...FOCUSING ON SATURDAY...AND WENT AHEAD AND ADDED SOME LOW POPS SPREADING NORTH ACROSS THE AREA FRIDAY NIGHT. STILL LOOKING AT SOME WARMING AND DRYING BEHIND THAT WAVE...COMING IN ALREADY BY SATURDAY EVENING. ENOUGH LOW LEVEL MOISTURE WILL STILL BE AROUND FOR AT LEAST SEASONAL POPS...AND COULD STILL BE PRETTY FAVORABLE FOR LATE AFTERNOON CONVECTION. PROBABLY MIXING OUT THE MOISTURE GRADUALLY SUNDAY AND MONDAY...THEN GRADUAL MOISTENING AGAIN AFTER THAT...LEADING TO SLIGHT COOLING DUE EARLIER CLOUD COVER. HINTS OF A SHORTWAVE NORTH OF US AND WEAK FRONT IN THE WED/THU TIME FRAME BUT UNSURE WHAT IMPACT THERE WILL BE IF ANY. FOR NOW WILL STICK WITH CLIMATOLOGICAL FORECAST. && .AVIATION...VFR CONDITIONS NEXT 24 HOURS. MAY SEE A WEAK T-STORM PASS OVER THE DENVER METRO AREA EARLY THIS EVENING. ONLY GUSTY WINDS AND A BRIEF RAINFALL ANTICIPATED. WEAK COLD FRONT ACROSS CENTRAL WYOMING FORECAST TO SLIDE SOUTH ACROSS NORTHEAST COLORADO AND THROUGH THE DENVER AREA EARLY FRIDAY MORNING. NO WEATHER EXPECTED WITH THIS PASSAGE OTHER THAN A SHIFT TO A NORTHEAST WIND. && .BOU WATCHES/WARNINGS/ADVISORIES...NONE. BAKER/GIMMESTAD
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE DENVER CO 1059 AM MDT THU JUN 18 2009 COZ030>051-191200- 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- 1059 AM MDT THU JUN 18 2009 THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHEAST AND NORTH CENTRAL COLORADO. .DAY ONE...TODAY AND TONIGHT THERE IS A SLIGHT RISK FOR SEVERE THUNDERSTORMS THIS AFTERNOON AND EVENING ACROSS THE FAR NORTHEAST PLAINS OF COLORADO. LARGE HAIL AND STRONG DAMAGING THUNDERSTORM WINDS WILL BE THE MAIN SEVERE WEATHER THREAT WITH THESE STORMS. SOME OF THE STRONGER STORMS NEAR THE NORTHEAST BORDER COULD LINGER WELL INTO THE NIGHT. OTHERWISE LOOK FOR SCATTERED THUNDERSTORMS TO DEVELOP IN THE HIGH COUNTRY AFTER THE NOON HOUR AND ISOLATED THUNDERSTORMS ON THE REMAINDER OF THE PLAINS AFTER 3 PM. THESE WEAKER STORMS MAY STILL PRODUCE GUSTY OUTFLOW WINDS...A BRIEF HEAVY RAIN SHOWER AND POSSIBLY SOME SMALL HAIL... PARTICULARLY FROM STORMS UP ALONG THE WYOMING BORDER IN LARIMER AND WELD COUNTIES. THESE STORMS SHOULD DISSIPATE BY MID-EVENING. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY WARMER AND DRIER CONDITIONS FRIDAY WILL BE FOLLOWED BY AN INCREASE IN SHOWER AND THUNDERSTORM ACTIVITY SATURDAY. SUNDAY THROUGH WEDNESDAY WILL RETURN TO WARMER AND DRIER CONDITIONS HOWEVER THE THREAT OF ISOLATED THUNDERSTORMS WILL REMAIN. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED TODAY OR TONIGHT. BAKER/GIMMESTAD
The Denver radar (KFTG), 71 km away, was scanning. The volume nearest the first event began at 01:29 UTC.
4 hail, 1 lightning. Local standard time, as filed.
A 41-yr old man was injured when he was struck by lightning on a golf course in Greeley. He was was struck on the 13th hole and suffered burns to his body, but was alert and concious when paramedics arrived.
A severe thunderstorm caused extensive damage to wheat and corn crops in the immediate area. Out of 104,000 planted acres of wheat in Phillips County; 3,000 were destroyed. Sixty thousand additional acres were damaged. Out of 102,000 planted acres of corn in the county; 2,000 were completely destroyed and 20,500 were damaged.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Colorado in 2009Every state in 2009This day in weather historyWarnings in Colorado, June 2009
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: 165690, 165684, 165683, 165682, 165681.