Alert archive / Colorado / Red Flag Warnings in 2026
Red Flag Warning 26, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this red flag warning at Mar 19, 2026, 1:57 PM MDT for Larimer County, Weld County, Colorado. It took effect at Mar 20, 2026, 11:00 AM MDT. It was in force for 8 hr. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Mar 19, 2026, 1:57 PM MDT (19:57 UTC)
- In effect from
- Mar 20, 2026, 11:00 AM MDT
- Expired
- Mar 20, 2026, 7:00 PM MDT
- In force
- 8 hr
- Issued by
- NWS Denver/Boulder, CO
Counties Larimer County, CO, Weld County, CO
The radar
The Cheyenne radar (KCYS), 61 km from the middle of the area, began a volume at 19:59 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.
The office that day
Everything else NWS Denver/Boulder, CO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 18, 7:06 PM MDT | Red Flag Warning | BOU | Larimer, Logan, Weld | 54 min |
| Mar 19, 2:16 AM MDT | Fire Weather Watch | BOU | Larimer, Weld | 12 hr |
| Mar 19, 2:16 AM MDT | Fire Weather Watch | BOU | Adams, Arapahoe, Boulder, Broomfield, Clear Creek, Denver and 15 more | 35 hr |
Nearby
Red Flag Warnings in Colorado, 2026Every red flag 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.