Alert archive / Colorado / Severe Thunderstorm Warnings in 2026

Severe Thunderstorm Warning 402, NWS Denver/Boulder, CO

September 20, 2026Phillips County, Colorado

NWS Denver/Boulder, CO issued this severe thunderstorm warning at Sep 20, 2026, 1:25 PM MDT for Phillips County, Colorado. It was in force for 50 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: Sep 20, 2026, 1:25 PM MDT (19:25 UTC)
Expired: Sep 20, 2026, 2:15 PM MDT
In force: 50 min
Issued by: NWS Denver/Boulder, CO
Area: Storm-based polygon
Hail: 1.25 in
Wind: 60.0 mph

County Phillips County, CO

The radar

The Goodland radar (KGLD), 148 km from the middle of the area, began a volume at 19:28 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 Sep 20, 11:12 AM MDT, 2 hours 13 minutes earlier.

Area forecast discussion, Sep 20, 11:12 AM MDT, 2 hours 13 minutes before

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The office that day

Everything else NWS Denver/Boulder, CO issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Sep 19, 6:38 PM MDT	Special Weather Statement	BOU	Arapahoe	37 min
Sep 19, 7:07 PM MDT	Special Weather Statement	BOU	Logan	53 min
Sep 20, 12:49 PM MDT	Severe Thunderstorm Warning	BOU	Logan, Phillips	41 min
Sep 20, 2:05 PM MDT	Severe Thunderstorm Warning Considerable damage threat	BOU	Phillips	32 min
Sep 20, 2:30 PM MDT	Severe Thunderstorm Warning	BOU	Lincoln	45 min
Sep 20, 3:01 PM MDT	Severe Thunderstorm Warning	BOU	Lincoln	44 min
Sep 20, 3:41 PM MDT	Severe Thunderstorm Warning Considerable damage threat	BOU	Lincoln	34 min

Nearby

Severe Thunderstorm Warnings in Colorado, 2026 Every 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.