Alert archive / Colorado / Severe Thunderstorm Warnings in 2025
Severe Thunderstorm Warning 151, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this severe thunderstorm warning at Jun 17, 2025, 5:53 AM MDT for Washington County, Colorado. It was in force for 37 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Jun 17, 2025, 5:53 AM MDT (11:53 UTC)
- Expired
- Jun 17, 2025, 6:30 AM MDT
- In force
- 37 min
- Issued by
- NWS Denver/Boulder, CO
- Area
- Storm-based polygon
- Hail
- 1.5 in
- Wind
- 50.0 mph
County Washington County, CO
The radar
The Denver radar (KFTG), 134 km from the middle of the area, began a volume at 11:55 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
Did it verify
Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this severe thunderstorm warning while it was in force. That is not proof nothing happened: reports are thin where few people live.
Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Jun 17, 3:45 AM MDT | Severe Thunderstorm Watch | SPC | 4 hr |
The nearest sounding before it
Dodge City, (KDDC), launched 00:00Z, 11.9 hours before the alert went out and 375 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 3202 J/kg
- Mixed-layer CIN
- -52 J/kg
- Mixed-layer LCL
- 1565 m above ground
- 0-6 km bulk shear
- 37 kt
- 0-1 km storm-relative helicity
- 8 m²/s²
- 0-3 km storm-relative helicity
- 175 m²/s²
- Significant tornado parameter
- 1.0
- Supercell composite
- 14.4
The text
As transmitted.
720
WUUS55 KBOU 171153
SVRBOU
COC121-171230-
/O.NEW.KBOU.SV.W.0151.250617T1153Z-250617T1230Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Denver CO
553 AM MDT Tue Jun 17 2025
The National Weather Service in Denver has issued a
* Severe Thunderstorm Warning for...
East Central Washington County in northeastern Colorado...
* Until 630 AM MDT.
* At 553 AM MDT, a severe thunderstorm was located near Platner, or
8 miles southeast of Akron, moving east at 15 mph.
HAZARD...Ping pong ball size hail.
SOURCE...Radar indicated.
IMPACT...People and animals outdoors will be injured. Expect
damage to roofs, siding, windows, and vehicles.
* Locations impacted include...
Otis and Platner.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Seek shelter inside a well-built structure and stay away from
windows. This storm is capable of producing large hail.
&&
LAT...LON 4002 10313 4023 10314 4025 10287 4002 10286
TIME...MOT...LOC 1153Z 264DEG 11KT 4010 10308
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.50 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...<50 MPH
$$
RPK1 follow-up statement
230 WWUS55 KBOU 171225 SVSBOU Severe Weather Statement National Weather Service Denver CO 625 AM MDT Tue Jun 17 2025 COC121-171235- /O.EXP.KBOU.SV.W.0151.000000T0000Z-250617T1230Z/ Washington CO- 625 AM MDT Tue Jun 17 2025 ...SEVERE THUNDERSTORM WARNING WILL EXPIRE AT 630 AM MDT FOR EAST CENTRAL WASHINGTON COUNTY... The storm which prompted the warning has weakened below severe limits, and has exited the warned area. Therefore, the warning will be allowed to expire. However, small hail and heavy rain are still possible with this thunderstorm. && LAT...LON 4002 10313 4023 10314 4025 10287 4002 10286 TIME...MOT...LOC 1153Z 264DEG 11KT 4010 10307 $$ RPK
What forecasters said that day
The local office's own words before this severe thunderstorm warning went out, 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 this severe thunderstorm warning went out at Jun 17, 5:17 AM MDT, 36 minutes earlier. Its key messages:
- Severe storm threat with high winds and large hail grow today, but still some uncertainties. Most areas will see some rain. Cooler.
- Strong signal for record breaking heat from Thursday into next weekend, along with potential for critical fire weather conditions.
Area forecast discussion, Jun 17, 5:17 AM MDT, 36 minutes before
Area Forecast Discussion National Weather Service Denver/Boulder CO 517 AM MDT Tue Jun 17 2025 .KEY MESSAGES... - Severe storm threat with high winds and large hail grow today, but still some uncertainties. Most areas will see some rain. Cooler. - Strong signal for record breaking heat from Thursday into next weekend, along with potential for critical fire weather conditions. && .UPDATE... Issued at 248 AM MDT Tue Jun 17 2025 Rare nocturnal storms, several severe, have developed in the previously unworked but increasingly moist and unstable airmass. MLCAPE was still 1500-2000 J/kg in these wee morning hours, so a few impressive storm updrafts were noted. Enough shear evidenced on the straight-line hodographs for splitting storms, too. We think storm intensity eventually settles down in the early morning hours as the airmass eventually gets worked over, but a few showers/isolated storms will remain with weak QG lift and a light post-frontal upslope component. The main question for today surrounds our afternoon severe storm threat, which could start as early as noon but should be essentially over by 6 pm as storms move rather quickly eastward with the shortwave. Despite the rather good agreement of severe storm development by early afternoon in the convective allowing models (CAMs), there are some uncertainties. This largely surrounds extent of stratus this morning, recovery in temperatures, and then arrival time of shortwave. The stratus is expected to be fairly widespread in the wake of these early morning showers and storms, which will slow temperature recovery. However, forecast soundings show that even temperatures around 70F with dewpoints in the mid 50s would yield MLCAPE of 1500 J/kg but with a weak cap. Some models are warmer than that, which would yield closer to 2000 J/kg. The shortwave noted in Utah right now is on track to reach the Front Range by 18Z, a little too early to coincide with peak heating. However, with cooling aloft lapse rates steepen accordingly and the cap should be broken, and be able to tap into the rich low level upslope and higher MLCAPE values. Thus, we still expect a severe threat to develop by noon-1 pm and then quickly progress east across the plains as storms organize into more linear structures. Large hail will be a threat, but a damaging high wind threat increases east and southeast across the plains. Some model guidance suggests gusts to 80 mph possible in enhanced bow echoes (something more typically seen in the Central Plains). We collaborated with SPC and pulled the Slight Risk back to the I-25 Corridor considering the best MLCAPE likely building here. Meanwhile, there was an upgrade to Enhanced Risk for east central Colorado where MCS development and bowing will be more likely as storms organize further. && .DISCUSSION /Through Monday/... Issued at 126 PM MDT Mon Jun 16 2025 Current satellite imagery shows cumulus clouds developing over the Front Range mountains as light elevated convective showers are just initiating, primarily in Larimer county. These showers will continue for the next couple of hours, spilling across I-25 corridor and Denver metro. Severe threat is low at this time, as SPC mesoanalysis shows decent CIN just east of the foothills due to a weak cap still in place. However, daytime mixing will eventually erode the cap. As these storms travel east, primarily into eastern Weld, Logan Sedgwick and Phillips counties, they will be entering into an environment that will support supercell development. MLCAPE is expected to increase to 3,000+ J/Kg with model Skew-T soundings showing 9 degrees C/km 500-700 mb lapse rates and bulk shear >30 kts. Due to these expected conditions, strong wind gusts up to 70 mph and large hail (golfball sized) are possible, mainly between 6 PM and 10 PM. Tornado threat is very low, but cannot rule out a brief spin up. Overnight, a cold front will cross the region bringing gusty winds and a few scattered light showers in the morning. Tuesday will be a lot cooler than the past couple of days, with ensemble guidance being in good agreement of the plains reaching up to the mid 70s. An upper level shortwave is expected to track across the region Tuesday afternoon, which could bring scattered thunderstorms. A deep moisture field will be advected into the region from the southeast, bringing dewpoint temperatures into the high 50s (and low 60s far northeast), with MLCAPE values up to 2,000 J/Kg and steep lapse rates. The only parameter that is lacking is bulk shear, as models indicate less than 30 kts. If guidance starts trending towards increasing shear, confidence will increase for severe storms over the plains. If these storms do materialize, wind and hail will be the primary threat. The cooldown will be very brief as we will start warming up again on Wednesday. Temperatures should reach up to the mid 80s across the plains, with mostly dry conditions. However, the main concern towards the end of the week will be the possibility of a heat wave Thursday through the weekend. Ensemble guidance has continued to trend towards multiple days of 97+ degree temperatures across the lower elevations. Friday should have the best chance reaching 100 degrees, as each member of the ECMWF has the max temperature being over 100 degrees. There is still a little uncertainty however, as the GEFS has most of their members reaching up to 99 degrees. Regardless, it will be very hot until we get into next week, as guidance has indicated a system moving through sometime Monday or Tuesday. Another concern with the scorching heat, is the fire weather threat. As an upper level ridge travels east, southwesterly flow aloft will bring dry conditions to the mountains and plains. Relative humidity values could get as low as the single digits and breezy wind gusts could bring about critical fire weather conditions. We will continue to monitor. && .AVIATION /12Z TAFS through 12Z Wednesday/... Issued at 517 AM MDT Tue Jun 17 2025 Most of the thunderstorms were pushing to the south and east, and the threat of any severe storms is going rapidly with it. However, there may still be a few showers or even an isolated storm around this morning. Areas of stratus with MVFR/IFR ceilings are expected to gradually lift through 18Z. That's when things for storms get interesting again. A shortwave will move across the area, likely sparking another round of storms. Those could start as early as 19Z and then organize into a linear storm complex which would potentially produce high winds and less extensive large hail as they move east across the I-25 Corridor. We have beefed up the winds for now to ~G40kts for a most likely scenario in a TEMPO group, but a 10-20% of reaching severe thresholds (50 kts) at KDEN. We think the main threat of storms would be pushing east of the TAF sites by 22-23Z, but still a chance of a lingering shower/isolated storm til 02Z Wednesday. Then gradual clearing and lighter drainage winds developing beyond 02Z. && .BOU WATCHES/WARNINGS/ADVISORIES... None. && UPDATE...Barjenbruch DISCUSSION...Ideker AVIATION...Barjenbruch
Hazardous weather outlook, Jun 16, 8:44 AM MDT, 21 hours 9 minutes before
Hazardous Weather Outlook National Weather Service Denver/Boulder CO 844 AM MDT Mon Jun 16 2025 COZ030>051-171445- 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- 844 AM MDT Mon Jun 16 2025 This hazardous weather outlook is for northeast and north central Colorado. .DAY ONE...Today and Tonight Well above normal temperatures will continue today, with highs in the low 90s across the lower elevations. Strong to severe storms are possible this afternoon and evening, primarily in Logan, Sedgwick, Phillips and northern Washington counties. Large hail and damaging wind gusts (up to 70 mph) are the main hazards. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday A storm system will bring cooler weather along with a chance of thunderstorms across the area Tuesday into Wednesday. Hot weather is likely to return by late this week, with high temperatures in the mid to upper 90s possible from Thursday through Saturday. .SPOTTER INFORMATION STATEMENT... Spotter activation will not be needed today and tonight, but reports of any hail or gusty winds will be appreciated.
In the hours before
Local storm report, Jun 17, 2:42 AM MDT, 3 hours 11 minutes before
Preliminary Local Storm Report...Summary
National Weather Service Denver CO
242 AM MDT Tue Jun 17 2025
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0239 AM Hail 1 SW Eaton 40.52N 104.73W
06/17/2025 E1.75 Inch Weld CO Public
Report from mPING: Golf Ball (1.75 in.).
0238 AM Hail 1 SW Lucerne 40.47N 104.71W
06/17/2025 E1.25 Inch Weld CO Public
Report from mPING: Half Dollar (1.25 in.).
0233 AM Hail Eaton 40.52N 104.71W
06/17/2025 E1.25 Inch Weld CO Public
Report from mPING: Half Dollar (1.25 in.).
0223 AM Hail 1 W Erie 40.03N 105.07W
06/17/2025 E0.75 Inch Boulder CO Public
Report from mPING: Dime (0.75 in.).
0221 AM Hail 2 SSE Wellington 40.68N 104.99W
06/17/2025 M1.50 Inch Larimer CO Public
&&Local storm report, Jun 17, 3:17 AM MDT, 2 hours 36 minutes before
Preliminary Local Storm Report...Summary
National Weather Service Denver CO
317 AM MDT Tue Jun 17 2025
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0302 AM Hail 3 W Black Hollow Reserv 40.62N 104.93W
06/17/2025 E1.25 Inch Weld CO Public
Report from mPING: Half Dollar (1.25 in.).
0249 AM Hail 1 W Gill 40.45N 104.54W
06/17/2025 E1.00 Inch Weld CO Public
Report from mPING: Quarter (1.00 in.).
0239 AM Hail 1 SW Eaton 40.52N 104.73W
06/17/2025 E1.75 Inch Weld CO Public
Report from mPING: Golf Ball (1.75 in.).
0238 AM Hail 1 SW Lucerne 40.47N 104.71W
06/17/2025 E1.25 Inch Weld CO Public
Report from mPING: Half Dollar (1.25 in.).
0236 AM Hail 1 S Wellington 40.69N 105.01W
06/17/2025 E2.00 Inch Larimer CO Public
Report from mPING: Hen Egg (2.00 in.).
0233 AM Hail Eaton 40.52N 104.71W
06/17/2025 E1.25 Inch Weld CO Public
Report from mPING: Half Dollar (1.25 in.).
0223 AM Hail 1 W Erie 40.03N 105.07W
06/17/2025 E0.75 Inch Boulder CO Public
Report from mPING: Dime (0.75 in.).
0221 AM Hail 2 SSE Wellington 40.68N 104.99W
06/17/2025 M1.50 Inch Larimer CO Public
&&Local storm report, Jun 17, 3:51 AM MDT, 2 hours 2 minutes before
Preliminary Local Storm Report...Summary
National Weather Service Denver CO
351 AM MDT Tue Jun 17 2025
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0346 AM Hail Eaton 40.52N 104.71W
06/17/2025 E0.75 Inch Weld CO Public
Report from mPING: Dime (0.75 in.).
0334 AM Hail 2 NE Johnstown 40.35N 104.87W
06/17/2025 E2.00 Inch Weld CO Public
Report from mPING: Hen Egg (2.00 in.).
0331 AM Hail 2 NE Johnstown 40.35N 104.87W
06/17/2025 E1.25 Inch Weld CO Public
Report from mPING: Half Dollar (1.25 in.).
0328 AM Hail 2 NE Johnstown 40.35N 104.87W
06/17/2025 E1.00 Inch Weld CO Public
Report from mPING: Quarter (1.00 in.).
0324 AM Hail 2 W Johnstown 40.33N 104.94W
06/17/2025 E1.00 Inch Weld CO Public
Report from mPING: Quarter (1.00 in.).
0302 AM Hail 3 W Black Hollow Reserv 40.62N 104.93W
06/17/2025 E1.25 Inch Weld CO Public
Report from mPING: Half Dollar (1.25 in.).
0249 AM Hail 1 W Gill 40.45N 104.54W
06/17/2025 E1.00 Inch Weld CO Public
Report from mPING: Quarter (1.00 in.).
0239 AM Hail 1 SW Eaton 40.52N 104.73W
06/17/2025 E1.75 Inch Weld CO Public
Report from mPING: Golf Ball (1.75 in.).
0238 AM Hail 1 SW Lucerne 40.47N 104.71W
06/17/2025 E1.25 Inch Weld CO Public
Report from mPING: Half Dollar (1.25 in.).
0236 AM Hail 1 S Wellington 40.69N 105.01W
06/17/2025 E2.00 Inch Larimer CO Public
Report from mPING: Hen Egg (2.00 in.).
0233 AM Hail Eaton 40.52N 104.71W
06/17/2025 E1.25 Inch Weld CO Public
Report from mPING: Half Dollar (1.25 in.).
0230 AM Hail 1 SSE Wellington 40.70N 105.00W
06/17/2025 M2.50 Inch Larimer CO Cocorahs
0223 AM Hail 1 W Erie 40.03N 105.07W
06/17/2025 E0.75 Inch Boulder CO Public
Report from mPING: Dime (0.75 in.).
0221 AM Hail 2 SSE Wellington 40.68N 104.99W
06/17/2025 M1.50 Inch Larimer CO Public
&&Local storm report, Jun 17, 4:20 AM MDT, 1 hour 33 minutes before
Preliminary Local Storm Report...Summary
National Weather Service Denver CO
420 AM MDT Tue Jun 17 2025
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0416 AM Hail 2 S Todd Creek 39.96N 104.88W
06/17/2025 E1.00 Inch Adams CO Public
Report from mPING: Quarter (1.00 in.).
0401 AM Hail 1 SW Lucerne 40.47N 104.71W
06/17/2025 M1.25 Inch Weld CO Public
Report from mPING: Half Dollar (1.25 in.).
0353 AM Hail 1 NE Lafayette 40.00N 105.08W
06/17/2025 E0.75 Inch Boulder CO Public
Report from mPING: Dime (0.75 in.).
0348 AM Hail Eaton 40.52N 104.71W
06/17/2025 E1.50 Inch Weld CO Public
Report from mPING: Ping Pong Ball (1.50
in.).
0346 AM Hail Eaton 40.52N 104.71W
06/17/2025 E0.75 Inch Weld CO Public
Report from mPING: Dime (0.75 in.).
0340 AM Hail 1 NE Milliken 40.33N 104.84W
06/17/2025 M1.50 Inch Weld CO Public
0334 AM Hail 2 NE Johnstown 40.35N 104.87W
06/17/2025 E2.00 Inch Weld CO Public
Report from mPING: Hen Egg (2.00 in.).
0331 AM Hail 2 NE Johnstown 40.35N 104.87W
06/17/2025 E1.25 Inch Weld CO Public
Report from mPING: Half Dollar (1.25 in.).
0328 AM Hail 2 NE Johnstown 40.35N 104.87W
06/17/2025 E1.00 Inch Weld CO Public
Report from mPING: Quarter (1.00 in.).
0324 AM Hail 2 W Johnstown 40.33N 104.94W
06/17/2025 E1.00 Inch Weld CO Public
Report from mPING: Quarter (1.00 in.).
0302 AM Hail 3 W Black Hollow Reserv 40.62N 104.93W
06/17/2025 E1.25 Inch Weld CO Public
Report from mPING: Half Dollar (1.25 in.).
0249 AM Hail 1 W Gill 40.45N 104.54W
06/17/2025 E1.00 Inch Weld CO Public
Report from mPING: Quarter (1.00 in.).
0239 AM Hail 1 SW Eaton 40.52N 104.73W
06/17/2025 E1.75 Inch Weld CO Public
Report from mPING: Golf Ball (1.75 in.).
0238 AM Hail 1 SW Lucerne 40.47N 104.71W
06/17/2025 E1.25 Inch Weld CO Public
Report from mPING: Half Dollar (1.25 in.).
0236 AM Hail 1 S Wellington 40.69N 105.01W
06/17/2025 E2.00 Inch Larimer CO Public
Report from mPING: Hen Egg (2.00 in.).
0233 AM Hail Eaton 40.52N 104.71W
06/17/2025 E1.25 Inch Weld CO Public
Report from mPING: Half Dollar (1.25 in.).
0230 AM Hail 1 SSE Wellington 40.70N 105.00W
06/17/2025 M2.50 Inch Larimer CO Cocorahs
0223 AM Hail 1 W Erie 40.03N 105.07W
06/17/2025 E0.75 Inch Boulder CO Public
Report from mPING: Dime (0.75 in.).
0221 AM Hail 2 SSE Wellington 40.68N 104.99W
06/17/2025 M1.50 Inch Larimer CO Public
&&Local storm report, Jun 17, 4:32 AM MDT, 1 hour 21 minutes before
Preliminary Local Storm Report...Summary
National Weather Service Denver CO
432 AM MDT Tue Jun 17 2025
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0426 AM Hail Fort Morgan 40.26N 103.80W
06/17/2025 E1.00 Inch Morgan CO Public
Report from mPING: Quarter (1.00 in.).
0425 AM Hail 2 SW Fort Morgan 40.24N 103.82W
06/17/2025 E1.25 Inch Morgan CO Public
Report from mPING: Half Dollar (1.25 in.).
0423 AM Hail 3 NW Henderson 39.94N 104.91W
06/17/2025 E0.75 Inch Adams CO Public
Report from mPING: Dime (0.75 in.).
0422 AM Hail 2 NW Henderson 39.94N 104.91W
06/17/2025 E1.00 Inch Adams CO Public
Report from mPING: Quarter (1.00 in.).
0421 AM Hail 2 W Todd Creek 39.98N 104.92W
06/17/2025 E1.00 Inch Adams CO Public
Report from mPING: Quarter (1.00 in.).
0421 AM Hail 2 W Henderson 39.93N 104.91W
06/17/2025 E1.00 Inch Adams CO Public
Report from mPING: Quarter (1.00 in.).
0416 AM Hail 2 S Todd Creek 39.96N 104.88W
06/17/2025 E1.00 Inch Adams CO Public
Report from mPING: Quarter (1.00 in.).
0401 AM Hail 1 SW Lucerne 40.47N 104.71W
06/17/2025 M1.25 Inch Weld CO Public
Report from mPING: Half Dollar (1.25 in.).
0353 AM Hail 1 NE Lafayette 40.00N 105.08W
06/17/2025 E0.75 Inch Boulder CO Public
Report from mPING: Dime (0.75 in.).
0348 AM Hail Eaton 40.52N 104.71W
06/17/2025 E1.50 Inch Weld CO Public
Report from mPING: Ping Pong Ball (1.50
in.).
0346 AM Hail Eaton 40.52N 104.71W
06/17/2025 E0.75 Inch Weld CO Public
Report from mPING: Dime (0.75 in.).
0340 AM Hail 1 NE Milliken 40.33N 104.84W
06/17/2025 M1.50 Inch Weld CO Public
0334 AM Hail 2 NE Johnstown 40.35N 104.87W
06/17/2025 E2.00 Inch Weld CO Public
Report from mPING: Hen Egg (2.00 in.).
0331 AM Hail 2 NE Johnstown 40.35N 104.87W
06/17/2025 E1.25 Inch Weld CO Public
Report from mPING: Half Dollar (1.25 in.).
0328 AM Hail 2 NE Johnstown 40.35N 104.87W
06/17/2025 E1.00 Inch Weld CO Public
Report from mPING: Quarter (1.00 in.).
0324 AM Hail 2 W Johnstown 40.33N 104.94W
06/17/2025 E1.00 Inch Weld CO Public
Report from mPING: Quarter (1.00 in.).
0302 AM Hail 3 W Black Hollow Reserv 40.62N 104.93W
06/17/2025 E1.25 Inch Weld CO Public
Report from mPING: Half Dollar (1.25 in.).
0249 AM Hail 1 W Gill 40.45N 104.54W
06/17/2025 E1.00 Inch Weld CO Public
Report from mPING: Quarter (1.00 in.).
0239 AM Hail 1 SW Eaton 40.52N 104.73W
06/17/2025 E1.75 Inch Weld CO Public
Report from mPING: Golf Ball (1.75 in.).
0238 AM Hail 1 SW Lucerne 40.47N 104.71W
06/17/2025 E1.25 Inch Weld CO Public
Report from mPING: Half Dollar (1.25 in.).
0236 AM Hail 1 S Wellington 40.69N 105.01W
06/17/2025 E2.00 Inch Larimer CO Public
Report from mPING: Hen Egg (2.00 in.).
0233 AM Hail Eaton 40.52N 104.71W
06/17/2025 E1.25 Inch Weld CO Public
Report from mPING: Half Dollar (1.25 in.).
0230 AM Hail 1 SSE Wellington 40.70N 105.00W
06/17/2025 M2.50 Inch Larimer CO Cocorahs
0223 AM Hail 1 W Erie 40.03N 105.07W
06/17/2025 E0.75 Inch Boulder CO Public
Report from mPING: Dime (0.75 in.).
0221 AM Hail 2 SSE Wellington 40.68N 104.99W
06/17/2025 M1.50 Inch Larimer CO Public
&&Local storm report, Jun 17, 5:05 AM MDT, 48 minutes before
Preliminary Local Storm Report...Summary
National Weather Service Denver CO
505 AM MDT Tue Jun 17 2025
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0439 AM Hail 1 W Barr Lake 39.96N 104.80W
06/17/2025 E1.50 Inch Adams CO Public
Report from mPING: Ping Pong Ball (1.50
in.).
0432 AM Hail 1 S Fort Morgan 40.25N 103.80W
06/17/2025 E1.00 Inch Morgan CO Public
Report from mPING: Quarter (1.00 in.).
0426 AM Hail Fort Morgan 40.26N 103.80W
06/17/2025 E1.00 Inch Morgan CO Public
Report from mPING: Quarter (1.00 in.).
0425 AM Hail 2 SW Fort Morgan 40.24N 103.82W
06/17/2025 E1.25 Inch Morgan CO Public
Report from mPING: Half Dollar (1.25 in.).
0423 AM Hail 3 NW Henderson 39.94N 104.91W
06/17/2025 E0.75 Inch Adams CO Public
Report from mPING: Dime (0.75 in.).
0422 AM Hail 2 NW Henderson 39.94N 104.91W
06/17/2025 E1.00 Inch Adams CO Public
Report from mPING: Quarter (1.00 in.).
0421 AM Hail 2 W Henderson 39.93N 104.91W
06/17/2025 E1.00 Inch Adams CO Public
Report from mPING: Quarter (1.00 in.).
0421 AM Hail 2 W Todd Creek 39.98N 104.92W
06/17/2025 E1.00 Inch Adams CO Public
Report from mPING: Quarter (1.00 in.).
0416 AM Hail 2 S Todd Creek 39.96N 104.88W
06/17/2025 E1.00 Inch Adams CO Public
Report from mPING: Quarter (1.00 in.).
0415 AM Hail 3 W Henderson 39.93N 104.92W
06/17/2025 M1.25 Inch Adams CO Trained Spotter
0401 AM Hail 1 SW Lucerne 40.47N 104.71W
06/17/2025 M1.25 Inch Weld CO Public
Report from mPING: Half Dollar (1.25 in.).
0353 AM Hail 1 NE Lafayette 40.00N 105.08W
06/17/2025 E0.75 Inch Boulder CO Public
Report from mPING: Dime (0.75 in.).
0348 AM Hail Eaton 40.52N 104.71W
06/17/2025 E1.50 Inch Weld CO Public
Report from mPING: Ping Pong Ball (1.50
in.).
0346 AM Hail Eaton 40.52N 104.71W
06/17/2025 E0.75 Inch Weld CO Public
Report from mPING: Dime (0.75 in.).
0340 AM Hail 1 NE Milliken 40.33N 104.84W
06/17/2025 M1.50 Inch Weld CO Public
0334 AM Hail 2 NE Johnstown 40.35N 104.87W
06/17/2025 E2.00 Inch Weld CO Public
Report from mPING: Hen Egg (2.00 in.).
0331 AM Hail 2 NE Johnstown 40.35N 104.87W
06/17/2025 E1.25 Inch Weld CO Public
Report from mPING: Half Dollar (1.25 in.).
0328 AM Hail 2 NE Johnstown 40.35N 104.87W
06/17/2025 E1.00 Inch Weld CO Public
Report from mPING: Quarter (1.00 in.).
0324 AM Hail 2 W Johnstown 40.33N 104.94W
06/17/2025 E1.00 Inch Weld CO Public
Report from mPING: Quarter (1.00 in.).
0302 AM Hail 3 W Black Hollow Reserv 40.62N 104.93W
06/17/2025 E1.25 Inch Weld CO Public
Report from mPING: Half Dollar (1.25 in.).
0249 AM Hail 1 W Gill 40.45N 104.54W
06/17/2025 E1.00 Inch Weld CO Public
Report from mPING: Quarter (1.00 in.).
0239 AM Hail 1 SW Eaton 40.52N 104.73W
06/17/2025 E1.75 Inch Weld CO Public
Report from mPING: Golf Ball (1.75 in.).
0238 AM Hail 1 SW Lucerne 40.47N 104.71W
06/17/2025 E1.25 Inch Weld CO Public
Report from mPING: Half Dollar (1.25 in.).
0236 AM Hail 1 S Wellington 40.69N 105.01W
06/17/2025 E2.00 Inch Larimer CO Public
Report from mPING: Hen Egg (2.00 in.).
0233 AM Hail Eaton 40.52N 104.71W
06/17/2025 E1.25 Inch Weld CO Public
Report from mPING: Half Dollar (1.25 in.).
0230 AM Hail 1 SSE Wellington 40.70N 105.00W
06/17/2025 M2.50 Inch Larimer CO Cocorahs
0223 AM Hail 1 W Erie 40.03N 105.07W
06/17/2025 E0.75 Inch Boulder CO Public
Report from mPING: Dime (0.75 in.).
0221 AM Hail 2 SSE Wellington 40.68N 104.99W
06/17/2025 M1.50 Inch Larimer CO Public
&&The office that day
Everything else NWS Denver/Boulder, CO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 16, 6:29 PM MDT | Special Weather Statement | BOU | Washington | 16 min |
| Jun 16, 6:37 PM MDT | Special Weather Statement | BOU | Logan | 23 min |
| Jun 16, 6:50 PM MDT | Special Weather Statement | BOU | Washington | 40 min |
| Jun 16, 7:10 PM MDT | Severe Thunderstorm Warning | BOU | Washington | 33 min |
| Jun 16, 7:19 PM MDT | Severe Thunderstorm Warning | BOU | Washington | 11 min |
| Jun 16, 7:24 PM MDT | Tornado Warning | BOU | Washington | 20 min |
| Jun 17, 1:57 AM MDT | Special Weather Statement | BOU | Weld | 33 min |
| Jun 17, 2:16 AM MDT | Severe Thunderstorm Warning | BOU | Larimer, Weld | 29 min |
| Jun 17, 2:19 AM MDT | Severe Thunderstorm Warning | BOU | Weld | 26 min |
| Jun 17, 2:38 AM MDT | Severe Thunderstorm Warning | BOU | Weld | 37 min |
| Jun 17, 2:43 AM MDT | Severe Thunderstorm Warning | BOU | Larimer, Weld | 32 min |
| Jun 17, 3:07 AM MDT | Severe Thunderstorm Warning | BOU | Larimer, Weld | 23 min |
| Jun 17, 3:14 AM MDT | Severe Thunderstorm Warning | BOU | Larimer, Weld | 31 min |
| Jun 17, 3:17 AM MDT | Severe Thunderstorm Warning | BOU | Larimer, Weld | 43 min |
| Jun 17, 3:22 AM MDT | Severe Thunderstorm Warning | BOU | Morgan, Weld | 38 min |
| Jun 17, 3:30 AM MDT | Severe Thunderstorm Warning | BOU | Weld | 30 min |
| Jun 17, 3:32 AM MDT | Severe Thunderstorm Warning | BOU | Weld | 28 min |
| Jun 17, 3:48 AM MDT | Severe Thunderstorm Warning | BOU | Morgan | 42 min |
| Jun 17, 3:52 AM MDT | Severe Thunderstorm Warning | BOU | Weld | 27 min |
| Jun 17, 3:54 AM MDT | Severe Thunderstorm Warning | BOU | Adams, Weld | 36 min |
| Jun 17, 4:02 AM MDT | Severe Thunderstorm Warning | BOU | Adams, Weld | 28 min |
| Jun 17, 4:06 AM MDT | Severe Thunderstorm Warning | BOU | Adams, Boulder, Broomfield | 39 min |
| Jun 17, 4:15 AM MDT | Severe Thunderstorm Warning | BOU | Morgan | 45 min |
| Jun 17, 4:26 AM MDT | Severe Thunderstorm Warning | BOU | Morgan | 34 min |
| Jun 17, 4:36 AM MDT | Severe Thunderstorm Warning | BOU | Weld | 24 min |
| Jun 17, 4:40 AM MDT | Severe Thunderstorm Warning | BOU | Adams, Denver | 19 min |
| Jun 17, 4:52 AM MDT | Severe Thunderstorm Warning | BOU | Adams | 38 min |
| Jun 17, 4:58 AM MDT | Severe Thunderstorm Warning | BOU | Morgan, Washington | 32 min |
| Jun 17, 5:19 AM MDT | Severe Thunderstorm Warning | BOU | Washington | 41 min |
| Jun 17, 5:21 AM MDT | Severe Thunderstorm Warning | BOU | Arapahoe, Douglas, Elbert | 39 min |
| Jun 17, 5:31 AM MDT | Severe Thunderstorm Warning | BOU | Adams, Arapahoe | 44 min |
| Jun 17, 5:56 AM MDT | Severe Thunderstorm Warning | BOU | Arapahoe, Douglas, Elbert | 34 min |
| Jun 17, 6:35 AM MDT | Special Weather Statement | BOU | Washington | 40 min |
| Jun 17, 9:45 AM MDT | Special Weather Statement | BOU | Elbert | 30 min |
| Jun 17, 10:11 AM MDT | Severe Thunderstorm Warning | BOU | Elbert, Lincoln | 34 min |
| Jun 17, 10:42 AM MDT | Severe Thunderstorm Warning | BOU | Elbert, Lincoln, Washington | 48 min |
| Jun 17, 10:54 AM MDT | Special Weather Statement | BOU | Jackson | 36 min |
| Jun 17, 11:11 AM MDT | Special Weather Statement | BOU | Jackson | 49 min |
| Jun 17, 11:19 AM MDT | Severe Thunderstorm Warning | BOU | Elbert, Lincoln | 41 min |
| Jun 17, 11:25 AM MDT | Severe Thunderstorm Warning | BOU | Larimer | 50 min |
| Jun 17, 11:35 AM MDT | Severe Thunderstorm Warning | BOU | Douglas, Jefferson | 40 min |
| Jun 17, 11:40 AM MDT | Flash Flood Warning | BOU | Larimer | 3 hr |
| Jun 17, 11:57 AM MDT | Severe Thunderstorm Warning | BOU | Lincoln | 48 min |
| Jun 17, 12:11 PM MDT | Severe Thunderstorm Warning | BOU | Larimer | 34 min |
| Jun 17, 12:28 PM MDT | Severe Thunderstorm Warning | BOU | Larimer | 32 min |
| Jun 17, 12:31 PM MDT | Severe Thunderstorm Warning | BOU | Elbert | 19 min |
| Jun 17, 12:39 PM MDT | Severe Thunderstorm Warning | BOU | Lincoln | 51 min |
| Jun 17, 12:48 PM MDT | Severe Thunderstorm Warning | BOU | Larimer | 17 min |
| Jun 17, 12:59 PM MDT | Special Weather Statement | BOU | Larimer | 46 min |
| Jun 17, 1:10 PM MDT | Special Weather Statement | BOU | Weld | 50 min |
| Jun 17, 1:35 PM MDT | Severe Thunderstorm Warning | BOU | Lincoln | 40 min |
| Jun 17, 1:37 PM MDT | Special Weather Statement | BOU | Broomfield | 38 min |
| Jun 17, 1:43 PM MDT | Severe Thunderstorm Warning | BOU | Weld | 32 min |
| Jun 17, 1:46 PM MDT | Severe Thunderstorm Warning | BOU | Adams, Boulder, Broomfield, Weld | 29 min |
| Jun 17, 1:58 PM MDT | Special Weather Statement | BOU | Denver, Jefferson | 47 min |
| Jun 17, 2:05 PM MDT | Severe Thunderstorm Warning | BOU | Adams, Denver, Weld | 40 min |
| Jun 17, 2:14 PM MDT | Severe Thunderstorm Warning | BOU | Lincoln | 46 min |
| Jun 17, 2:39 PM MDT | Special Weather Statement | BOU | Adams, Morgan | 51 min |
| Jun 17, 2:44 PM MDT | Special Weather Statement | BOU | Logan | 46 min |
| Jun 17, 2:50 PM MDT | Severe Thunderstorm Warning | BOU | Lincoln | 25 min |
| Jun 17, 3:59 PM MDT | Special Weather Statement | BOU | Sedgwick | 46 min |
| Jun 17, 4:08 PM MDT | Severe Thunderstorm Warning | BOU | Sedgwick | 22 min |
Nearby
Severe Thunderstorm Warnings in Colorado, 2025Every severe thunderstorm warning in 2025
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.