Alert archive / Colorado / Severe Thunderstorm Warnings in 2026
Severe Thunderstorm Warning 105, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this severe thunderstorm warning at Jun 21, 2026, 1:53 PM MDT for Washington County, Colorado. It was in force for 37 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, 2026, 1:53 PM MDT (19:53 UTC)
- Expired
- Jun 21, 2026, 2:30 PM MDT
- In force
- 37 min
- Issued by
- NWS Denver/Boulder, CO
- Area
- Storm-based polygon
- Tornado
- Possible
- Hail
- 1.0 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 19:54 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, 12:46 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
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 Jun 21, 11:53 AM MDT, 2 hours earlier.
Area forecast discussion, Jun 21, 11:53 AM MDT, 2 hours before
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Special weather statement, Jun 21, 1:19 PM MDT, 34 minutes before
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</html>Special weather statement, Jun 21, 1:34 PM MDT, 19 minutes before
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<div class="status" id="status">Temporary Notice</div>
<h1 id="headline">This service is currently unavailable.</h1>
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The site you requested is temporarily down for maintenance or an unexpected outage.
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Please try again in a few minutes.
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</html>Special weather statement, Jun 21, 1:38 PM MDT, 15 minutes before
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</head>
<body>
<main class="wrap">
<section class="card" role="status" aria-live="polite">
<div class="status" id="status">Temporary Notice</div>
<h1 id="headline">This service is currently unavailable.</h1>
<p id="message1">
The site you requested is temporarily down for maintenance or an unexpected outage.
</p>
<p id="message2">
Please try again in a few minutes.
</p>
<p class="small" id="detail">
If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
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</html>Special weather statement, Jun 21, 1:41 PM MDT, 12 minutes before
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</head>
<body>
<main class="wrap">
<section class="card" role="status" aria-live="polite">
<div class="status" id="status">Temporary Notice</div>
<h1 id="headline">This service is currently unavailable.</h1>
<p id="message1">
The site you requested is temporarily down for maintenance or an unexpected outage.
</p>
<p id="message2">
Please try again in a few minutes.
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<p class="small" id="detail">
If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
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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 |
|---|---|---|---|---|
| Jun 20, 7:17 PM MDT | Severe Thunderstorm Warning | BOU | Weld | 43 min |
| Jun 20, 7:35 PM MDT | Tornado Warning | BOU | Weld | 28 min |
| Jun 20, 7:52 PM MDT | Severe Thunderstorm Warning | BOU | Weld | 38 min |
| Jun 20, 8:03 PM MDT | Severe Thunderstorm Warning | BOU | Weld | 27 min |
| Jun 20, 8:26 PM MDT | Severe Thunderstorm Warning | BOU | Weld | 34 min |
| Jun 20, 8:41 PM MDT | Special Weather Statement | BOU | Logan | 49 min |
| Jun 20, 9:01 PM MDT | Severe Thunderstorm Warning | BOU | Logan, Weld | 29 min |
| Jun 20, 9:37 PM MDT | Severe Thunderstorm Warning | BOU | Logan | 38 min |
| Jun 20, 10:22 PM MDT | Severe Thunderstorm Warning | BOU | Weld | 38 min |
| Jun 20, 10:46 PM MDT | Severe Thunderstorm Warning | BOU | Morgan, Weld | 35 min |
| Jun 21, 1:19 PM MDT | Special Weather Statement | BOU | Washington | 26 min |
| Jun 21, 1:34 PM MDT | Special Weather Statement | BOU | Phillips | 41 min |
| Jun 21, 1:38 PM MDT | Special Weather Statement | BOU | Washington | 37 min |
| Jun 21, 1:41 PM MDT | Special Weather Statement | BOU | Morgan | 49 min |
| Jun 21, 2:15 PM MDT | Special Weather Statement | BOU | Lincoln | 45 min |
| Jun 21, 2:25 PM MDT | Severe Thunderstorm Warning | BOU | Washington | 35 min |
| Jun 21, 2:28 PM MDT | Severe Thunderstorm Warning | BOU | Lincoln | 32 min |
| Jun 21, 4:50 PM MDT | Severe Thunderstorm Warning | BOU | Washington | 40 min |
| Jun 21, 4:52 PM MDT | Severe Thunderstorm Warning | BOU | Washington | 22 min |
| Jun 21, 5:39 PM MDT | Special Weather Statement | BOU | Morgan | 36 min |
| Jun 21, 5:46 PM MDT | Special Weather Statement | BOU | Arapahoe | 44 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.