Gusty winds from a decaying shower brought strong winds to a narrow corridor north of Boulder, where the peak gust measured 72 mph. Stronger storms (mainly sub-severe) developed over the plains with up to one inch hail over eastern Elbert County.
Every event with a place to put it; 3 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 episode as NWS BOU wrote it up.
Gusty winds from a decaying shower brought strong winds to a narrow corridor north of Boulder, where the peak gust measured 72 mph. Stronger storms (mainly sub-severe) developed over the plains with up to one inch hail over eastern Elbert 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 Aug 14, 1:40 PM MST, 45 minutes earlier.
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</html>Hazardous Weather Outlook National Weather Service Denver/Boulder CO 1035 AM MDT Thu Aug 14 2025 COZ030>051-151645- 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- 1035 AM MDT Thu Aug 14 2025 ...RED FLAG WARNING FOR THE MOUNTAINS, FOOTHILLS, AND HIGH MOUNTAIN VALLEYS THROUGH THIS EVENING... This hazardous weather outlook is for northeast and north central Colorado. .DAY ONE...Today and Tonight The potential for new wildfire starts will increase today, as some thunderstorms will produce lightning but little if any rainfall. Any passing showers or storms will also be capable of producing sudden wind gusts to 40-50 mph or more. Temperatures will heat up to the highest of the week, with highs expected to reach the upper 90s across the plains and I-25 Corridor. A few spots will reach 100F. Be sure to stay hydrated and take plenty of breaks in the shade if working outdoors. .DAYS TWO THROUGH SEVEN...Friday through Wednesday Somewhat higher storm coverage can be expected Friday and Saturday, especially over the mountains. Drier weather is expected to return again by Sunday and continue into early next week, although there will be a slight chance of storms each afternoon and evening. .SPOTTER INFORMATION STATEMENT... Spotter activation will not be required today or tonight.
The Denver radar (KFTG), 58 km away, was scanning. The volume nearest the first event began at 22:59 UTC.
4 hail, 3 high wind, 1 thunderstorm wind. Local standard time, as filed.
The report was from mesonet station DW0417.
The report was from mesonet station TT788.
The report was from mPING.
The report was from mPING.
The report was from mPING.
Off duty NWS employee reported hail up to quarter size.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Colorado in 2025Every state in 2025This day in weather historyWarnings in Colorado, August 2025
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 2026-10-01. Each event’s entry at NCEI: 1282480, 1282481, 1282483, 1282466, 1282467, 1282468, 1282470, 1282471.