Alert archive / Colorado / Tornado Warnings in 2025
Tornado Warning 21, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this tornado warning at Jun 13, 2025, 4:10 PM MDT for Adams County, Colorado. It was in force for 20 min. 1 report came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Jun 13, 2025, 4:10 PM MDT (22:10 UTC)
- Expired
- Jun 13, 2025, 4:30 PM MDT
- In force
- 20 min
- Issued by
- NWS Denver/Boulder, CO
- Area
- Storm-based polygon
- Tornado
- Radar indicated
- Hail
- 1.0 in
County Adams County, CO
The radar
The Denver radar (KFTG), 22 km from the middle of the area, began a volume at 22:10 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jun 13, 4:10 PM MDT | TORNADO | 2 Ssw Lochbuie, CO | Landspout tornado confirmed by Denver International Airport observer as well as trained spotter and public sources. Location is approximate. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Riverton, WY (KRIW), launched 12:00Z, 10.2 hours before the alert went out and 465 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
- 215 J/kg
- Mixed-layer CIN
- -234 J/kg
- Mixed-layer LCL
- 1418 m above ground
- 0-6 km bulk shear
- 28 kt
- 0-1 km storm-relative helicity
- 140 m²/s²
- 0-3 km storm-relative helicity
- 195 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
The text
As transmitted.
306 WFUS55 KBOU 132210 TORBOU COC001-132230- /O.NEW.KBOU.TO.W.0021.250613T2210Z-250613T2230Z/ BULLETIN - EAS ACTIVATION REQUESTED Tornado Warning National Weather Service Denver CO 410 PM MDT Fri Jun 13 2025 The National Weather Service in Denver has issued a * Tornado Warning for... Northwestern Adams County in northeastern Colorado... * Until 430 PM MDT. * At 410 PM MDT, a severe thunderstorm capable of producing a tornado was located over Lochbuie, or 21 miles northeast of Denver, moving northeast at 15 mph. HAZARD...Tornado. SOURCE...Radar indicated rotation. IMPACT...Expect damage to mobile homes, roofs, and vehicles. * Locations impacted include... Brighton. PRECAUTIONARY/PREPAREDNESS ACTIONS... Move to an interior room on the lowest floor of a well-built building away from windows. If you are outdoors, in a mobile home, or in a vehicle, move to the closest substantial shelter and protect yourself from flying debris. && LAT...LON 3991 10474 4000 10479 4000 10455 3996 10453 TIME...MOT...LOC 2210Z 237DEG 11KT 3997 10472 TORNADO...RADAR INDICATED MAX HAIL SIZE...<1.00 IN $$ RPK
1 follow-up statement
517 WWUS55 KBOU 132230 SVSBOU Severe Weather Statement National Weather Service Denver CO 430 PM MDT Fri Jun 13 2025 COC001-132240- /O.EXP.KBOU.TO.W.0021.000000T0000Z-250613T2230Z/ Adams CO- 430 PM MDT Fri Jun 13 2025 ...TORNADO WARNING HAS EXPIRED FOR NORTHWESTERN ADAMS COUNTY... The storm which prompted the warning has weakened below severe limits, and no longer appears capable of producing a tornado. Therefore, the warning has been allowed to expire. However, small hail, gusty winds, and heavy rain are still possible with this thunderstorm. && LAT...LON 3991 10474 4000 10479 4000 10455 3996 10453 TIME...MOT...LOC 2210Z 237DEG 11KT 3997 10471 $$ RPK
The office that day
Everything else NWS Denver/Boulder, CO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 12, 6:10 PM MDT | Special Weather Statement | BOU | Gilpin | 35 min |
| Jun 12, 6:22 PM MDT | Severe Thunderstorm Warning | BOU | Logan | 38 min |
| Jun 12, 8:02 PM MDT | Special Weather Statement | BOU | Broomfield, Jefferson | 28 min |
| Jun 12, 8:23 PM MDT | Severe Thunderstorm Warning | BOU | Phillips | 24 min |
| Jun 13, 1:36 PM MDT | Special Weather Statement | BOU | Douglas | 24 min |
| Jun 13, 1:59 PM MDT | Special Weather Statement | BOU | Douglas | 31 min |
| Jun 13, 2:03 PM MDT | Special Weather Statement | BOU | Douglas | 27 min |
| Jun 13, 2:35 PM MDT | Special Weather Statement | BOU | Douglas | 25 min |
| Jun 13, 3:39 PM MDT | Special Weather Statement | BOU | Arapahoe | 51 min |
| Jun 13, 4:02 PM MDT | Special Weather Statement | BOU | Adams | 28 min |
| Jun 13, 4:17 PM MDT | Tornado Warning | BOU | Weld | 13 min |
| Jun 13, 4:22 PM MDT | Severe Thunderstorm Warning | BOU | Adams, Morgan, Weld | 38 min |
| Jun 13, 4:34 PM MDT | Special Weather Statement | BOU | Lincoln | 41 min |
| Jun 13, 4:42 PM MDT | Severe Thunderstorm Warning | BOU | Arapahoe, Lincoln, Washington | 33 min |
| Jun 13, 5:07 PM MDT | Severe Thunderstorm Warning | BOU | Morgan, Weld | 38 min |
| Jun 13, 5:12 PM MDT | Special Weather Statement | BOU | Lincoln | 48 min |
| Jun 13, 5:38 PM MDT | Special Weather Statement | BOU | Morgan | 37 min |
| Jun 13, 5:49 PM MDT | Severe Thunderstorm Warning | BOU | Morgan | 26 min |
| Jun 13, 5:52 PM MDT | Severe Thunderstorm Warning | BOU | Adams, Morgan, Washington | 38 min |
Nearby
Tornado Warnings in Colorado, 2025Every tornado warning in 2025Tornadoes 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.