Alert archive / Colorado / Severe Thunderstorm Warnings in 2026
Severe Thunderstorm Warning 266, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this severe thunderstorm warning at Jul 24, 2026, 5:05 PM MDT for Boulder County, Jefferson County, Colorado. It was in force for 40 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Jul 24, 2026, 5:05 PM MDT (23:05 UTC)
- Expired
- Jul 24, 2026, 5:45 PM MDT
- In force
- 40 min
- Issued by
- NWS Denver/Boulder, CO
- Area
- Storm-based polygon
- Hail
- 1.25 in
- Wind
- 60.0 mph
Counties Boulder County, CO, Jefferson County, CO
The radar
The Denver radar (KFTG), 65 km from the middle of the area, began a volume at 23:08 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 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 Jul 23, 5:33 PM MDT, 23 hours 32 minutes earlier.
Area forecast discussion, Jul 23, 5:33 PM MDT, 23 hours 32 minutes before
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</html>The office that day
Everything else NWS Denver/Boulder, CO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 23, 6:41 PM MDT | Areal Flood Advisory | BOU | Larimer | 3 hr |
| Jul 23, 7:04 PM MDT | Special Weather Statement | BOU | Broomfield | 41 min |
| Jul 23, 9:17 PM MDT | Areal Flood Advisory | BOU | Jefferson | 58 min |
| Jul 24, 2:51 AM MDT | Heat Advisory | BOU | Adams, Arapahoe, Boulder, Broomfield, Denver, Douglas and 3 more | 42 hr |
| Jul 24, 2:51 AM MDT | Heat Advisory | BOU | Adams, Arapahoe, Boulder, Broomfield, Denver, Douglas and 10 more | 66 hr |
| Jul 24, 5:00 PM MDT | Special Weather Statement | BOU | Broomfield | 45 min |
Nearby
Severe Thunderstorm Warnings in Colorado, 2026Every severe thunderstorm warning in 2026
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; radar from the NEXRAD Level II archive.