A severe thunderstorm produced large hail, up to 2 inches in diameter, in Logan County. In addition, a small landspout tornado touched down near Cope, in southeast Washington County.
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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.
A severe thunderstorm produced large hail, up to 2 inches in diameter, in Logan County. In addition, a small landspout tornado touched down near Cope, in southeast Washington County.
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, 2:05 AM MST, 11 hours 18 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE DENVER CO 305 AM MDT WED JUN 18 2008 .SHORT TERM...SOME SUBTLE CHANGES FROM THE LAST FEW DAYS. ONCE AGAIN THE SHORTWAVE OF THE DAY IS ILL TIMED. IT IS CAUSING SOME SHALLOW CONVECTION ACROSS THE AREA TODAY...BUT LOOKS TO BE EAST OF OUR AREA BY LATE AFTERNOON. HOWEVER...THERE WILL BE SLIGHT COOLING THROUGHOUT THE ATMOSPHERE BEHIND THIS FEATURE...WEAKENING THE CAP THAT HAS LIMITED THE EXTENT OF THUNDERSTORM ACTIVITY. IN ADDITION...IT LOOKS LIKE THERE WILL BE MORE MOISTURE OVER THE WESTERN PORTION OF THE PLAINS TODAY. SOME OF THIS WILL MIX OUT AGAIN...BUT WITH THE COOLING ALOFT THE SAME DEW POINTS SHOULD BE MORE PRODUCTIVE. OVERALL WILL POINT TOWARD A BIT HIGHER COVERAGE TODAY...BUT STILL IN THE 20-30 PERCENT RANGE OVER THE PLAINS. INTENSITY STILL LOOKS LESS NEAR THE MOUNTAINS WITH CAPES OF 500-1000 INCREASING TO 1000-2000 NEAR THE EASTERN BORDER. STILL A LOW THREAT OF SEVERE STORMS SIMILAR TO THE LAST FEW DAYS. WITH THE LACK OF FORCING AND DRY AIR ALOFT...EXPECT CONVECTION TO DIMINISH AND MOVE OUT OF THE AREA THIS EVENING. MADE ONLY MINOR CHANGES TO CLOUD COVER AND TEMPERATURES REFLECTING TIMING OF THE SHORTWAVE...WITH SLIGHTLY COOLER TEMPERATURES TODAY AND TONIGHT. .LONG TERM...NOW THE MODELS ACTUALLY HAVE THE UPPER RIDGE AXIS WELL WEST OF FORECAST AREA THROUGH SATURDAY. THE FLOW ALOFT FOR US IS NOW DUE NORTHWESTERLY. THE QG VERTICAL VELOCITY FIELDS HAVE VERY WEAK DOWNWARD MOTION PROGGED OVER THE FORECAST AREA FRIDAY THROUGH SATURDAY NIGHT. THE BOUNDARY LAYER FLOW IS PROGGED TO BE FAIRLY BENIGN THROUGH THE PERIOD...MOST LIKELY ADHERING TO NORMAL DIURNAL TRENDS. FOR MOISTURE...CROSS SECTIONS HAVE SOME OVER THE PLAINS ON FRIDAY...MAINLY IN THE MID LEVELS. FRIDAY NIGHT IS PRETTY DRY. THERE IS SOME MOISTURE IN THE UPPER LEVELS ON SATURDAY. THE BOUNDARY LAYER DEW POINTS ARE MAINLY IN THE 40S F OVER THE PLAINS ON FRIDAY...WITH 30S TO MID 40S ON SATURDAY. THE FAR EASTERN BORDER AREA DOES HAVE MID 40S TO LOWER 50S F BY LATE SATURDAY. PRECIPITABLE WATER PROGGS HAVE 0.50-0.90 INCH OVER THE PLAINS FRIDAY THROUGH SATURDAY NIGHT. THE THETA-E AXIS IS OVER THE PLAINS OF COLORADO ON FRIDAY...BUT IT MIGRATES TO THE EASTERN BORDER FOR SATURDAY. THE CAPE IS BETTER FOR THE FOOTHILLS AND ADJACENT PLAINS LATE DAY FRIDAY...BUT BETTER FURTHER EAST ALONG THE BORDER FOR LATE DAY SATURDAY. THE CAPE VALUES ARE NOT SIGNIFICANT EITHER DAY. LAPSE RATES ARE PRETTY STEEP OVER ALL AREAS BOTH LATE DAY FRIDAY AND SATURDAY. THE QPF FIELDS HAVE VERY SPARSE MEASURABLE RAINFALL AMOUNTS BOTH FRIDAY AND SATURDAY. SO FOR POPS...WILL GO WITH A MIX OF PERSISTENCE AND A BIT LESS MOISTURE THAN OF LATE. IN OTHER WORDS...MORE 10%-20% LATE DAY FRIDAY AND SATURDAY...LEANING MORE TOWARDS THE 10%S ESPECIALLY SATURDAY. FOR TEMPERATURES...FRIDAYS HIGHS ARE 1.5-3.0 C WARMER THAN TODAYS. SATURDAYS WARM UP 2-3 C FROM FRIDAYS NUMBERS. FOR THE LATER DAYS...SUNDAY THROUGH WEDNESDAY...THE UPPER RIDGE STILL DOMINATES THE FORECAST AREA ON ALL THE MODELS. THERE MAY BE A WEAK UPPER TROUGH MONDAY NIGHT INTO TUESDAY. WILL CHANGE NOTHING. && .AVIATION...ISOLATED THUNDERSTORMS ARE EXPECTED IN THE AFTERNOON AND EVENING...WITH POSSIBLE LIGHTNING AND WIND GUSTS TO 30 KNOTS THE MAIN IMPACT. && .BOU WATCHES/WARNINGS/ADVISORIES...NONE. && GIMMESTAD/RJK
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE DENVER CO 1050 AM MDT WED JUN 18 2008 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- 1050 AM MDT WED JUN 18 2008 THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHEAST AND NORTH CENTRAL COLORADO. .DAY ONE...TODAY AND TONIGHT ISOLATED THUNDERSTORMS ARE EXPECTED THIS AFTERNOON AND EVENING ACROSS THE AREA. THE STORMS WILL BE MORE NUMEROUS NEAR THE EASTERN BORDER THIS EVENING. ISOLATED SEVERE THUNDERSTORMS ARE POSSIBLE EAST OF A FORT MORGAN AND LIMON LINE...WITH HAIL UP TO GOLF BALL SIZE AND WIND GUSTS TO 60 MPH THE MAIN THREATS. THE THUNDERSTORM ACTIVITY WILL DIMINISH IN THE MOUNTAINS THIS EVENING...AND ON THE EASTERN BORDER AROUND MIDNIGHT. .DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT ANTICIPATED TODAY OR TONIGHT. D-L/COOPER
The Goodland radar (KGLD), 106 km away, was scanning. The volume nearest the first event began at 20:24 UTC.
1 tornado, 1 hail. Local standard time, as filed.
A small tornado touched down but did no damage.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Colorado in 2008Every state in 2008This day in weather historyThe tornado archive for Colorado, 2008Warnings in Colorado, June 2008
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: 109452, 101910.