High based showers and thunderstorms produced wind gusts up to 66 mph (KAPA). A couple tree were up rooted in the Centennial area due to the strong winds.
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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.
High based showers and thunderstorms produced wind gusts up to 66 mph (KAPA). A couple tree were up rooted in the Centennial area due to the strong winds. Lightning did not accompany all of the high wind reports. As storms moved east into a more moist airmass, they began to produce hail. Including, a one inch hail was reported with a storm in 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 Jul 7, 4:37 AM MST, 7 hours 8 minutes earlier. Its key messages:
Area Forecast Discussion National Weather Service Denver/Boulder CO 537 AM MDT Mon Jul 7 2025 .KEY MESSAGES... - Scattered afternoon/evening thunderstorms today, most numerous over the eastern plains. - Some strong to severe storms are possible with large hail and damaging wind gusts, mainly across the eastern plains. - Hot temperatures expected Wednesday with the upper 90s expected across the plains. It is possible the hot temperatures extend into Thursday. && .UPDATE... Issued at 300 AM MDT Mon Jul 7 2025 Upper level ridging begins to intensify over the region today (continuing through Wednesday). With warming temperatures aloft and slight drying, thunderstorm activity is expected to decrease across the higher terrain and also along the I-25 urban corridor today. There still should be enough moisture and instability this afternoon for high-based thunderstorms. As the storms progress eastward, storms encounter an increasingly unstable and more moist airmass. Storms are expected to intensify with a few becoming severe with large hail and winds to 60 mph. A shortwave trough moves southeast across the Northern Plains today. This is expected to produce a line of thunderstorms across Nebraska, which may clip northeast Colorado as the line dives southeast. Storms are expected to shift east of the area early this evening with the area storm free around sunset. && .DISCUSSION /Through Sunday/... Issued at 238 PM MDT Sun Jul 6 2025 Satellite and radar show two main areas of convection this afternoon. One area is along a boundary that has setup from near Woodrow in western Washington County across to Kiowa. There are good levels of instability feeding these storms with mixed-layer CAPE around 1,500 j/kg. Strong updrafts have formed along this boundary as a result. The issue these storms are currently having with reaching severe limits is the lack of deep layer shear. Surface to 6 km shear values are around 25 knots so storms may struggle to maintain updrafts long enough to produce severe hail although a report or two of 1" hail is possible. However, severe wind gusts will be possible out of these storms throughout the afternoon and evening given steep lapse rates and downdraft CAPE around 1,700-1,800 j/kg. The other area of storms is along and just south of the Cheyenne Ridge. This area will have the potential for storms to congeal into a line as it heads east from around Cheyenne, WY. As it heads further east, the instability will increase with mixed-layer CAPE around 2,000 j/kg over the far northeast corner of Colorado. It is expected that these storms will produce damaging wind gusts up to 70 mph. A Severe Thunderstorm Watch has been issued for areas along and east of I-25 until 8pm tonight. Denver County was withheld from this watch as dew points have dropped to the low 40 there and instability is lower than other areas. Some model guidance is showing that storms could continue into the overnight hours tonight across the eastern plains. That threat will depend on how much instability the storms this afternoon and evening "use up." If there are fewer storms this afternoon and evening, scattered coverage of storms could occur after midnight. However, it is more likely that only a stray storm or two forms. Better moisture will stay in place over the eastern plains on Monday with dew point values in the low 60s from Akron and eastward. With steep lapse rates, most unstable CAPE values are forecast to exceed 3,000 j/kg in the northeast corner of Colorado. This is ample instability for strong to severe storms to form. The uncertainty with Monday's forecast will come from the amount of shear and what boundaries are left behind from overnight convection. A weak shortwave aloft will enhance deep layer shear with values around 35 knots across the far northeast corner. These factors will lead to the development of an MCS that could produce severe wind gusts up to 70 mph mainly east of a line from Fort Morgan to Limon. SPC has an enhanced risk of severe weather and it seems reasonable for the far northeast corner. The Denver metro and I-25 corridor will mostly likely avoid much of the severe weather assuming the best moisture stays further east. The axis of an upper level ridge will move northeastward into Colorado on Tuesday. This will increase temperatures aloft and will decrease the chance for storms. However, enough lingering moisture could produce an isolated storm near the Cheyenne Ridge. High temperatures will begin to warm up to the mid 90s across the plains. Wednesday is still on track to be the warmest day of the upcoming week as the best subsidence and warmest air aloft will be overhead that day. Temperature forecasts still have Denver flirting with 100 degrees. With the NBM and ECMWF MOS mean forecasting a high of 98, the forecast was left at that number. However, Denver does have a chance of reaching the record daily high temperature of 100 degrees. A Heat Advisory may be needed especially if it appears cloud cover will be minimal. Models have converged on a trough moving through our forecast area on Thursday but this may only reduce the heat by 2-4 degrees from Wednesday. A cold front moves through Thursday night with much cooler conditions on Friday. && .AVIATION /12Z TAFS through 12Z Tuesday/... Issued at 537 AM MDT Mon Jul 7 2025 Southerly winds to continue through mid morning and then decrease as they turn northwesterly around 15Z. Isolated/scattered afternoon thunderstorms are expected with the best time frame 20-23Z. Gusty outflow winds producing wind shifts will be the main threat. Storms are expected to be east of the Denver area by 00Z Tuesday. East to northeast winds around 00Z turn southeast and then eventually southwest Monday evening/night. && .BOU WATCHES/WARNINGS/ADVISORIES... None. && UPDATE...Meier DISCUSSION...Danielson AVIATION...Meier
Hazardous Weather Outlook National Weather Service Denver/Boulder CO 1056 AM MDT Mon Jul 7 2025 COZ030>051-081700- 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- 1056 AM MDT Mon Jul 7 2025 This hazardous weather outlook is for northeast and north central Colorado. .DAY ONE...Today and Tonight Scattered showers and thunderstorms will develop this afternoon and evening mainly east of a line from Greeley to Denver International Airport. Some of these storms will be strong to severe especially over the far northeast corner of Colorado where damaging wind gusts above 60 mph and large hail in excess of 1 inch in diameter is possible. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday Very hot temperatures near 100 degrees across the plains are expected on Wednesday with highs in the upper 90s possible on Thursday. While most areas will be dry throughout the long term period, gusty showers will be possible most days. .SPOTTER INFORMATION STATEMENT... Spotter activation will be needed today or tonight to pass along any severe hail or wind reports.
The Denver radar (KFTG), 35 km away, was scanning. The volume nearest the first event began at 18:47 UTC.
6 hail, 3 thunderstorm wind, 1 high wind. Local standard time, as filed.
A few trees in the area were uprooted and part of the IKEA sign was blown down.
The wind gust occurred at the Fort Collins/Loveland Airport from a decaying shower.
Video evidence of a few tennis ball or baseball sized hailstones which significantly damaged the rear windshield of a vehicle. Most stones were quarter to golf ball sized. Time and location estimated.
Reported via social media. Time and location estimated.
Retired NWS employee measured 3.9cm diameter hail in Otis approximately 20 minutes after it fell.
Report from mping.
One small tree blown down and stripped of most of its leaves. Spotter reported some hail but did not have an estimate of 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, July 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 2026-09-24. Each event’s entry at NCEI: 1261439, 1261442, 1261440, 1261438, 1261436, 1261437, 1261435, 1261434, 1261433, 1261443.