Alert archive / Colorado / Severe Thunderstorm Warnings in 2023

Severe Thunderstorm Warning 110, NWS Denver/Boulder, CO

June 21, 2023Washington County, Colorado

NWS Denver/Boulder, CO issued this severe thunderstorm warning at Jun 21, 2023, 3:42 PM MDT for Washington County, Colorado. It was in force for 33 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: Jun 21, 2023, 3:42 PM MDT (21:42 UTC)
Expired: Jun 21, 2023, 4:15 PM MDT
In force: 33 min
Issued by: NWS Denver/Boulder, CO
Area: Storm-based polygon
Tornado: Possible
Damage threat: Considerable
Hail: 2.5 in
Wind: 60.0 mph

County Washington County, CO

The radar

The Denver radar (KFTG), 117 km from the middle of the area, began a volume at 21:42 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Jun 21, 12:33 PM MDT	Tornado Watch	SPC	7 hr

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 21, 9:32 AM MDT	Flood Watch	BOU	Adams, Arapahoe, Douglas, Elbert, Lincoln, Washington	20 hr
Jun 21, 1:17 PM MDT	Severe Thunderstorm Warning	BOU	Logan	43 min
Jun 21, 1:48 PM MDT	Special Weather Statement	BOU	Logan	42 min
Jun 21, 1:53 PM MDT	Severe Thunderstorm Warning	BOU	Logan	52 min
Jun 21, 1:59 PM MDT	Severe Thunderstorm Warning	BOU	Washington	46 min
Jun 21, 2:22 PM MDT	Severe Thunderstorm Warning Considerable damage threat	BOU	Logan	23 min
Jun 21, 2:36 PM MDT	Severe Thunderstorm Warning	BOU	Logan, Washington	19 min
Jun 21, 2:39 PM MDT	Severe Thunderstorm Warning	BOU	Washington	36 min
Jun 21, 2:42 PM MDT	Severe Thunderstorm Warning	BOU	Logan	33 min
Jun 21, 3:09 PM MDT	Severe Thunderstorm Warning Considerable damage threat	BOU	Logan	36 min
Jun 21, 3:11 PM MDT	Severe Thunderstorm Warning	BOU	Washington	34 min
Jun 21, 3:24 PM MDT	Flash Flood Warning	BOU	Logan	3 hr
Jun 21, 3:33 PM MDT	Tornado Warning	BOU	Logan	27 min
Jun 21, 3:38 PM MDT	Areal Flood Advisory	BOU	Washington	3 hr
Jun 21, 3:51 PM MDT	Tornado Warning Tornado observed	BOU	Logan, Morgan, Washington	24 min
Jun 21, 3:53 PM MDT	Severe Thunderstorm Warning Considerable damage threat	BOU	Logan	37 min
Jun 21, 4:01 PM MDT	Severe Thunderstorm Warning	BOU	Weld	29 min
Jun 21, 4:02 PM MDT	Areal Flood Advisory	BOU	Logan, Morgan, Washington	3 hr
Jun 21, 4:05 PM MDT	Tornado Warning	BOU	Washington	25 min
Jun 21, 4:21 PM MDT	Tornado Warning	BOU	Washington	24 min
Jun 21, 4:22 PM MDT	Severe Thunderstorm Warning Considerable damage threat	BOU	Morgan, Washington	23 min
Jun 21, 4:23 PM MDT	Severe Thunderstorm Warning	BOU	Weld	37 min
Jun 21, 4:37 PM MDT	Tornado Warning Tornado observedConsiderable damage threat	BOU	Washington	23 min
Jun 21, 4:42 PM MDT	Flash Flood Warning	BOU	Morgan, Washington	3 hr
Jun 21, 4:45 PM MDT	Severe Thunderstorm Warning Considerable damage threat	BOU	Morgan	45 min
Jun 21, 4:46 PM MDT	Severe Thunderstorm Warning	BOU	Adams, Arapahoe, Washington	29 min
Jun 21, 4:47 PM MDT	Tornado Warning	BOU	Morgan, Weld	28 min
Jun 21, 4:54 PM MDT	Tornado Warning Tornado observedConsiderable damage threat	BOU	Washington	21 min
Jun 21, 4:55 PM MDT	Severe Thunderstorm Warning	BOU	Lincoln	35 min
Jun 21, 5:07 PM MDT	Severe Thunderstorm Warning	BOU	Logan, Morgan, Weld	38 min
Jun 21, 5:10 PM MDT	Tornado Warning Tornado observedConsiderable damage threat	BOU	Washington	35 min
Jun 21, 5:13 PM MDT	Tornado Warning	BOU	Logan	17 min
Jun 21, 5:16 PM MDT	Severe Thunderstorm Warning Considerable damage threat	BOU	Morgan	44 min
Jun 21, 5:25 PM MDT	Tornado Warning	BOU	Logan	20 min
Jun 21, 5:27 PM MDT	Tornado Warning	BOU	Morgan, Washington	33 min
Jun 21, 5:28 PM MDT	Severe Thunderstorm Warning	BOU	Washington	32 min
Jun 21, 5:41 PM MDT	Tornado Warning	BOU	Logan	19 min
Jun 21, 5:45 PM MDT	Severe Thunderstorm Warning	BOU	Morgan, Washington	30 min
Jun 21, 5:52 PM MDT	Tornado Warning Tornado observedConsiderable damage threat	BOU	Washington	23 min
Jun 21, 5:54 PM MDT	Severe Thunderstorm Warning	BOU	Logan	36 min
Jun 21, 5:54 PM MDT	Severe Thunderstorm Warning	BOU	Boulder, Jefferson	36 min
Jun 21, 5:59 PM MDT	Areal Flood Advisory	BOU	Larimer	3 hr

Nearby

Severe Thunderstorm Warnings in Colorado, 2023 Every severe thunderstorm warning in 2023

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.