Hail, Adams
- When
- May 27, 1:42 PM MST
- Where
- Adams County, 1 mi N of Commerce City
- Measured
- 0.75 in hail
- Reported by
- TRAINED SPOTTER
- Coordinates
- 39.817, -104.917
Hail in Colorado, May 27, 2001
3 hail, as filed by the National Weather Service.
Where it happened
Every event with a place to put it. Tap one for its entry below.
- Tornadoes
- Tropical storms and surge
- Floods
- Wind
- Hail
- Winter weather
- Heat and drought
- Cold
- Fire, smoke and dust
- Marine and coastal
- Other
The toll
- Deaths
- 0
- Injuries
- 0
- Property damage
- None recorded
- Crop damage
- None recorded
- Events
- 3
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.
What forecasters said that day
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 27, 2:45 AM MST, 10 hours 57 minutes earlier.
Area forecast discussion, May 27, 2:45 AM MST, 10 hours 57 minutes before
NORTHEAST AND NORTH CENTRAL COLORADO AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE DENVER COLORADO 345 AM MDT SUN MAY 27 2001 SHORT TERM DISCUSSION: PESKY CONVECTION CONTINUES TO LINGER IN PARTS OF THE CWA THIS MORNING AND REFUSES TO FINISH UP. RADAR SUGGESTS THAT IT MAY FINALLY BE ON ITS LAST LEG AT 0930Z. THIS TREND GIVES SOME CREDENCE TO THE 06Z MM5 FORECAST WHICH SHOWS MOST OF THE PRECIPITATION ENDING BY 15Z WITH THE EXCEPTION OF THE FAR NORTHEAST CORNER. WITH QUITE A BIT OF ACTIVITY UPSTREAM IN WYOMING WILL PROBABLY HAVE TO KEEP MENTION OF SOME SHOWERS EARLY THIS MORNING IN NORTHEAST CORNER. AS FAR AS LATER ON IS CONCERNED...THE MM5 DOES REDEVELOP MORE STANDARD CONVECTION THIS AFTERNOON... FORMING/MOVING IT SOUTHEASTWARD ACROSS THE CWA AFTER ABOUT 18Z. IT ALSO PREDICTS ONE RELATIVELY STRONG STORM TO FORM OVER NORTHEAST WELD COUNTY AND TRACK THROUGH NORTHEAST MORGAN COUNTY BY 22Z AND DISSIPATE OVER SOUTHWEST YUMA COUNTY BY 01Z. IT WILL BE INTERESTING TO SEE IF THIS WORKS OUT. AS REGARDS THE THREAT OF SEVERE CONVECTION...THE FACT THAT IT IS THE END OF MAY AND THERE WILL BE THUNDERSTORMS AROUND IS PROBABLY SUFFICIENT REASON TO BE CONCERNED. IN ADDITION...BOTH THE MM5 AND THE MESOETA HAVE AREAS OF CAPE IN EXCESS OF 1000 J/KG AROUND BY AFTERNOON. HOWEVER NEITHER MODEL COMPLETELY RIDS THE CWA OF ALL OF THE CIN. WE'LL SEE. LONG TERM DISCUSSION: THE UPPER RIDGE WILL PUSH TO THE EAST OF THE AREA DURING THE DAY MONDAY WITH THE SOUTHWEST U.S. UPPER LOW APPROACHING THE AREA. FLOW NEAR THE SURFACE INCREASES SOME AND GAINS A SOUTH TO SOUTHEAST COMPONENT WHICH COULD DEVELOP A DENVER CYCLONE DURING THE DAY. MOREOVER...3D TRAJECTORIES FROM THE ETA SHOW LOW LEVEL AIR PARCELS ARRIVING OVER NORTHEAST COLORADO MONDAY AFTERNOON COMING FROM THE SOUTHEAST WHICH SHOULD BRING SOME MORE MOISTURE INTO THE AREA. THESE AIR PARCELS AS WELL AS THOSE ALOFT ALSO EXPERIENCE QUITE A BIT OF ASCENT ON THEIR WAY HERE WHICH CONTINUES INTO MONDAY NIGHT. CONSEQUENTLY THERE MAY BE SOME CONVECTION LINGERING LATER INTO THE NIGHT ON MONDAY. ADDITIONALLY THE THREAT OF SOME OF THE STORMS BECOMING SEVERE MAY BE BETTER THAN ON SUNDAY. IN THE EXTENDED PERIOD...THE NEW MRF DOES NOT DIFFER MUCH FROM THE 26/00 RUN. IF WE ARE TO FOLLOW THIS MODEL...WE COULD EXPECT A WEAKENING TROUGH TO COME OVERHEAD FROM THE SOUTHWEST ON TUESDAY FOLLOWED BY A WEAK HIGH PRESSURE SURGE FROM THE NORTH TUESDAY NIGHT. AFTER THE TROUGH PASSAGE...UPPER RIDGING RETURNS TO OUR WEST WITH BRISK NORTHWEST FLOW ALOFT OVER THE AREA WEDNESDAY AND THURSDAY. THIS RIDGE THEN MOVES INTO COLORADO FRIDAY AND SATURDAY WITH SOME LEE TROUGHING OCCURRING THEN AS WELL. IF THIS SCENARIO PANS OUT AS ADVERTISED MOST OF THE WEEK WOULD BE SUCEPTIBLE TO AFTERNOON THUNDER WITH LESSENING CHANCES TOWARD THE END OF THE WEEK. IT WOULD ALSO BE FAIRLY COOL MhOST OF THE WEEK TOO WITH SOME WARMING LATER ON. THE PRESENT EXTENDED FORECAST PRETTY MUCH CONVEYS THIS SITUATION SO AM NOT COMPELLED TO MAKE ANY SIGNIFICANT CHANGES THERE. ET .DEN...NONE.
In the hours before
Special weather statement, May 27, 9:45 AM MST, 3 hours 57 minutes before
COZ030>051-272000- SIGNIFICANT WEATHER OUTLOOK FOR NORTHEAST AND NORTH CENTRAL COLORADO NATIONAL WEATHER SERVICE DENVER CO 1045 AM MDT SUN MAY 27 2001 THIS OUTLOOK PERTAINS TO THE FOLLOWING COLORADO COUNTIES ADAMS ARAPAHOE BOULDER CLEAR CREEK DENVER DOUGLAS ELBERT GILPIN GRAND JACKSON JEFFERSON LARIMER LINCOLN LOGAN MORGAN PARK PHILLIPS SEDGWICK SUMMIT WASHINGTON WELD SYNOPSIS: A MODERATE NORTHWESTERLY FLOW ALOFT WILL CONTINUE OVER NORTHEASTERN COLORADO TODAY AND TONIGHT. THE AIRMASS WILL BE FAIRLY MOIST AND UNSTABLE. LOW LEVEL MOISTURE WILL GRADUALLY INCREASE THROUGH THE AFTERNOON AS EASTERLY WINDS INCREASE. SCATTERED SHOWERS AND THUNDERSTORMS WILL DEVELOP TODAY. THE BEST POTENTIAL FOR SEVERE STORMS WILL BE EAST AND SOUTH OF THE DENVER AREA. A FEW SEVERE THUNDERSTORMS COULD DEVELOP AFTER 2 PM...ACROSS EASTERN PORTIONS OF ADAMS...ARAPAHOE AND ELBERT COUNTIES...AS WELL AS SOUTHERN WASHINGTON AND LINCOLN COUNTIES. THE BEST COMBINATION OF HEATING...LOW LEVEL MOISTURE AND VERTICAL SHEAR WILL RESIDE IN THIS AREA. THE MAIN THREAT FROM THE STORMS WILL LIKELY BE LARGE HAIL AND DAMAGING WINDS. SPOTTER ACTIVATION MAY BE NEEDED LATER TODAY. COOPER
Special weather statement, May 27, 10:24 AM MST, 3 hours 18 minutes before
COZ030>051-272000- SIGNIFICANT WEATHER OUTLOOK FOR NORTHEAST AND NORTH CENTRAL COLORADO NATIONAL WEATHER SERVICE DENVER CO 1045 AM MDT SUN MAY 27 2001 THIS OUTLOOK PERTAINS TO THE FOLLOWING COLORADO COUNTIES ADAMS ARAPAHOE BOULDER CLEAR CREEK DENVER DOUGLAS ELBERT GILPIN GRAND JACKSON JEFFERSON LARIMER LINCOLN LOGAN MORGAN PARK PHILLIPS SEDGWICK SUMMIT WASHINGTON WELD SYNOPSIS: A MODERATE TO STRONG NORTHWESTERLY FLOW ALOFT WILL CONTINUE OVER NORTHEASTERN COLORADO TODAY AND TONIGHT. THE AIRMASS WILL BE FAIRLY MOIST AND UNSTABLE. LOW LEVEL MOISTURE WILL GRADUALLY INCREASE THROUGH THE AFTERNOON AS EASTERLY WINDS INCREASE. SCATTERED SHOWERS AND THUNDERSTORMS WILL DEVELOP TODAY. THE BEST POTENTIAL FOR SEVERE STORMS WILL BE EAST AND SOUTH OF THE DENVER AREA. A FEW SEVERE THUNDERSTORMS COULD DEVELOP AFTER 2 PM...ACROSS EASTERN PORTIONS OF ADAMS...ARAPAHOE AND ELBERT COUNTIES...AS WELL AS SOUTHERN WASHINGTON AND LINCOLN COUNTIES. THE BEST COMBINATION OF HEATING...LOW LEVEL MOISTURE AND VERTICAL SHEAR WILL RESIDE IN THIS AREA. THE MAIN THREAT FROM THE STORMS WILL LINKELY BE LARGE HAIL AND DAMAGING WINDS. SPOTTER ACTIVATION MAY BE NEEDED LATER TODAY. COOPER
Special weather statement, May 27, 12:30 PM MST, 1 hour 12 minutes before
COZ030>051-272130- SIGNIFICANT WEATHER OUTLOOK FOR NORTHEAST AND NORTH CENTRAL COLORADO NATIONAL WEATHER SERVICE DENVER CO 130 PM MDT SUN MAY 27 2001 THIS OUTLOOK PERTAINS TO THE FOLLOWING COLORADO COUNTIES ADAMS ARAPAHOE BOULDER CLEAR CREEK DENVER DOUGLAS ELBERT GILPIN GRAND JACKSON JEFFERSON LARIMER LINCOLN LOGAN MORGAN PARK PHILLIPS SEDGWICK SUMMIT WASHINGTON WELD SYNOPSIS: A MODERATE TO STRONG NORTHWESTERLY FLOW ALOFT WILL CONTINUE OVER NORTHEASTERN COLORADO THIS AFTERNOON AND EVENING. THE AIRMASS WILL BE FAIRLY MOIST AND UNSTABLE. LOW LEVEL MOISTURE WILL REMAIN INTACT THIS AFTERNOON AS EASTERLY WINDS GRADUALLY INCREASE. AT 1 PM...SCATTERED SHOWERS AND THUNDERSTORM WERE DEVELOPING NORTH OF A LINE EXTENDING FROM LONGMONT TO STERLING. ALTHOUGH THESE STORMS ARE NOT EXPECTED TO BECOME SEVERE...OUTFLOW GENERATED FROM THESE STORMS MAY BE SUFFICIENT ENOUGH TO TRIGGER STRONGER STORMS SOUTH AND EAST OF THIS AREA LATER THIS AFTERNOON. THE BEST POTENTIAL FOR SEVERE STORMS WILL BE EAST AND SOUTH OF THE DENVER AREA. A FEW SEVERE THUNDERSTORMS COULD DEVELOP AFTER 230 PM... ACROSS EASTERN PORTIONS OF ADAMS...ARAPAHOE AND ELBERT COUNTIES...AS WELL AS WASHINGTON AND LINCOLN COUNTIES. THE BEST COMBINATION OF HEATING...LOW LEVEL MOISTURE AND VERTICAL SHEAR WILL RESIDE IN THIS AREA. THE MAIN THREAT FROM THE STORMS WILL LIKELY BE LARGE HAIL AND DAMAGING WINDS. SPOTTER ACTIVATION WILL BE NEEDED LATER TODAY. COOPER
The radar
The Denver radar (KFTG), 32 km away, was scanning. The volume nearest the first event began at 20:44 UTC.
Event by event
3 hail. Local standard time, as filed.
Hail, Larimer
- When
- May 27, 2:15 PM MST
- Where
- Larimer County, 3 mi N of Bellvue
- Measured
- 1.5 in hail
- Reported by
- TRAINED SPOTTER
- Coordinates
- 40.683, -105.167
Hail, Elbert
- When
- May 27, 2:43 PM MST
- Where
- Elbert County, 18 mi WSW of Matheson
- Measured
- 1 in hail
- Reported by
- TRAINED SPOTTER
- Coordinates
- 39.067, -104.300
What these are
- Hail
- Hail three-quarters of an inch or larger, or smaller hail that caused damage, filed with the largest stone measured.
After NWS Directive 10-1605, the rules offices file Storm Data by.
The same day elsewhere
- Tornado and Hail in Oklahoma, May 27 to 28, 2001
- Tornado in New Jersey, May 27, 2001
- Tornado and Hail in Kansas, May 27, 2001
- Hail and Damaging Wind in Pennsylvania, May 27, 2001
- Hail and Damaging Winds in Oklahoma, May 27 to 28, 2001
- Tornado and Hail in Maryland, May 27, 2001
- Tornadoes and Hail in Virginia, May 27, 2001
- Tornadoes and Hail in Mississippi, May 27 to 28, 2001
- Hail and Damaging Winds in New York, May 27, 2001
- Hail and Damaging Winds in Texas, May 27 to 28, 2001
- Hail and Damaging Winds in Oklahoma, May 27, 2001
- Hail and Damaging Wind in Kansas, May 27, 2001
More
Every storm in Colorado in 2001Every state in 2001This day in weather historyWarnings in Colorado, May 2001
Sources
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: 5250150, 5250152, 5250151.