Alert archive / Colorado / Severe Thunderstorm Warnings in 2025
Severe Thunderstorm Warning 96, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this severe thunderstorm warning at Jun 12, 2025, 1:45 PM MDT for Grand County, Jackson County, Colorado. It was in force for 45 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 12, 2025, 1:45 PM MDT (19:45 UTC)
- Expired
- Jun 12, 2025, 2:30 PM MDT
- In force
- 45 min
- Issued by
- NWS Denver/Boulder, CO
- Area
- Storm-based polygon
- Tornado
- Possible
- Hail
- 1.0 in
- Wind
- 50.0 mph
Counties Grand County, CO, Jackson County, CO
The radar
The Cheyenne radar (KCYS), 147 km from the middle of the area, began a volume at 19:44 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 Jun 12, 11:29 AM MDT, 2 hours 16 minutes earlier.
Area forecast discussion, Jun 12, 11:29 AM MDT, 2 hours 16 minutes before
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</html>Hazardous weather outlook, Jun 12, 9:33 AM MDT, 4 hours 12 minutes before
Hazardous Weather Outlook National Weather Service Denver/Boulder CO 933 AM MDT Thu Jun 12 2025 COZ030>051-131545- Jackson County Below 9000 Feet- West Jackson and West Grand Counties Above 9000 Feet- Grand and Summit Counties Below 9000 Feet- South and East Jackson/Larimer/North and Northeast Grand/ Northwest Boulder Counties Above 9000 Feet- South and Southeast Grand/West Central and Southwest Boulder/ Gilpin/Clear Creek/Summit/North and West Park Counties Above 9000 Feet-Larimer and Boulder Counties Between 6000 and 9000 Feet- Jefferson and West Douglas Counties Above 6000 Feet/Gilpin/Clear Creek/Northeast Park Counties Below 9000 Feet- Central and Southeast Park County- Larimer County Below 6000 Feet/Northwest Weld County- Boulder And Jefferson Counties Below 6000 Feet/West Broomfield County- North Douglas County Below 6000 Feet/Denver/West Adams and Arapahoe Counties/East Broomfield County- Elbert/Central and East Douglas Counties Above 6000 Feet- Northeast Weld County-Central and South Weld County-Morgan County- Central and East Adams and Arapahoe Counties- North and Northeast Elbert County Below 6000 Feet/North Lincoln County- Southeast Elbert County Below 6000 Feet/South Lincoln County- Logan County-Washington County-Sedgwick County-Phillips County- 933 AM MDT Thu Jun 12 2025 This hazardous weather outlook is for northeast and north central Colorado. .DAY ONE...Today and Tonight Scattered showers and thunderstorms this afternoon will bring gusty winds, with speeds reaching up to 50 mph. A few storms could become severe with 60 mph winds. Over the northeast corner of Colorado, one inch hail may occur with the severe thunderstorms as well. .DAYS TWO THROUGH SEVEN...Friday through Wednesday Scattered afternoon showers and thunderstorms are expected again Friday. Some strong to severe storms will be possible over the northeast plains Friday afternoon. For the weekend, the chance for storms is limited to the northeastern plain. Where a severe storm or two will be possible. .SPOTTER INFORMATION STATEMENT... Spotter activation will not be needed today and tonight.
In the hours before
Special weather statement, Jun 12, 1:12 PM MDT, 33 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 |
|---|---|---|---|---|
| Jun 11, 6:14 PM MDT | Special Weather Statement | BOU | Lincoln | 31 min |
| Jun 11, 6:51 PM MDT | Special Weather Statement | BOU | Lincoln | 39 min |
| Jun 11, 6:54 PM MDT | Severe Thunderstorm Warning | BOU | Lincoln | 36 min |
| Jun 11, 6:58 PM MDT | Severe Thunderstorm Warning | BOU | Sedgwick | 26 min |
| Jun 12, 1:12 PM MDT | Special Weather Statement | BOU | Park | 48 min |
| Jun 12, 1:28 PM MDT | Special Weather Statement | BOU | Jackson | 47 min |
| Jun 12, 2:05 PM MDT | Special Weather Statement | BOU | Gilpin | 40 min |
| Jun 12, 2:17 PM MDT | Special Weather Statement | BOU | Larimer | 43 min |
| Jun 12, 3:11 PM MDT | Severe Thunderstorm Warning | BOU | Larimer | 22 min |
| Jun 12, 5:30 PM MDT | Severe Thunderstorm Warning | BOU | Logan, Morgan | 38 min |
| Jun 12, 5:51 PM MDT | Severe Thunderstorm Warning | BOU | Morgan, Washington | 23 min |
Nearby
Severe Thunderstorm Warnings in Colorado, 2025Every severe thunderstorm warning in 2025
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.