Alert archive / Colorado / Severe Thunderstorm Warnings in 2024
Severe Thunderstorm Warning 230, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this severe thunderstorm warning at Aug 11, 2024, 6:06 PM MDT for Adams County, Arapahoe County, Denver County, Colorado. It was in force for 24 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
- Aug 11, 2024, 6:06 PM MDT (00:06 UTC)
- Expired
- Aug 11, 2024, 6:30 PM MDT
- In force
- 24 min
- Issued by
- NWS Denver/Boulder, CO
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Adams County, CO, Arapahoe County, CO, Denver County, CO
The radar
The Denver radar (KFTG), 4 km from the middle of the area, began a volume at 00:07 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 Aug 11, 5:38 PM MDT, 28 minutes earlier.
Area forecast discussion, Aug 11, 5:38 PM MDT, 28 minutes before
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</html>Hazardous weather outlook, Aug 11, 10:59 AM MDT, 7 hours 7 minutes before
Hazardous Weather Outlook National Weather Service Denver/Boulder CO 1059 AM MDT Sun Aug 11 2024 COZ030>051-121700- 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- 1059 AM MDT Sun Aug 11 2024 This hazardous weather outlook is for northeast and north central Colorado. .DAY ONE...Today and Tonight Scattered thunderstorms are expected to redevelop over the mountains by early afternoon and then spread and develop eastward across the plains through the late afternoon hours. A couple storms will likely become severe, mainly along and east of a Sterling to Akron to Limon line where more instability exists. The main threat is damaging wind gusts to around 60 mph, but large hail is also possible. The recent burn scars will see a limited threat of flash flooding, as storms will be moving along and intensity of storms in/near the mountains is expected to be a little less than yesterday. Storms will diminish from northwest to southeast across the area this evening. .DAYS TWO THROUGH SEVEN...Monday through Saturday Scattered to numerous showers and storms are expected to start the week, most numerous over the high country and Palmer Divide. Locally heavy rainfall is possible with the stronger storms that could elevate the flash flood threat for sensitive areas like our burn scars. A couple of storms could become severe Monday and Monday evening with possibly a higher threat on Tuesday. There will be a gradual warming and drying trend Wednesday through Friday, with thunderstorm activity returning to a more typical summer convective pattern as the week persists. .SPOTTER INFORMATION STATEMENT... Spotter activation will not be needed today or tonight. However, any reports of heavy rainfall, strong wind gusts, or hail will be appreciated.
In the hours before
Special weather statement, Aug 11, 2:21 PM MDT, 3 hours 45 minutes before
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</html>Local storm report, Aug 11, 3:20 PM MDT, 2 hours 46 minutes before
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</html>Special weather statement, Aug 11, 5:15 PM MDT, 51 minutes before
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</html>Special weather statement, Aug 11, 5:56 PM MDT, 10 minutes before
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</html>Special weather statement, Aug 11, 5:59 PM MDT, 7 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 |
|---|---|---|---|---|
| Aug 11, 8:23 PM MDT | Special Weather Statement | BOU | Denver | 37 min |
| Aug 12, 1:20 AM MDT | Dense Fog Advisory | BOU | Logan, Morgan, Phillips, Sedgwick, Washington, Weld | 8 hr |
| Aug 12, 9:50 AM MDT | Flood Watch | BOU | Adams, Arapahoe, Boulder, Broomfield, Clear Creek, Denver and 8 more | 14 hr |
| Aug 12, 12:20 PM MDT | Areal Flood Advisory | BOU | Larimer | 3 hr |
| Aug 12, 1:40 PM MDT | Areal Flood Advisory | BOU | Larimer | 3 hr |
| Aug 12, 1:55 PM MDT | Flash Flood Warning | BOU | Larimer | 3 hr |
| Aug 12, 2:52 PM MDT | Flash Flood Warning | BOU | Larimer | 2 hr |
| Aug 12, 3:51 PM MDT | Special Weather Statement | BOU | Arapahoe | 39 min |
| Aug 12, 4:20 PM MDT | Severe Thunderstorm Warning | BOU | Weld | 40 min |
| Aug 12, 4:44 PM MDT | Tornado Warning | BOU | Weld | 31 min |
| Aug 12, 5:08 PM MDT | Special Weather Statement | BOU | Elbert | 52 min |
| Aug 12, 5:09 PM MDT | Flash Flood Warning | BOU | Arapahoe, Elbert | 3 hr |
| Aug 12, 5:15 PM MDT | Severe Thunderstorm Warning | BOU | Weld | 45 min |
| Aug 12, 5:17 PM MDT | Areal Flood Advisory | BOU | Elbert | 14 min |
| Aug 12, 5:21 PM MDT | Special Weather Statement | BOU | Weld | 39 min |
| Aug 12, 5:26 PM MDT | Tornado Warning | BOU | Weld | 34 min |
| Aug 12, 5:31 PM MDT | Flash Flood Warning | BOU | Elbert | 3 hr |
| Aug 12, 5:31 PM MDT | Special Weather Statement | BOU | Elbert | 44 min |
| Aug 12, 5:48 PM MDT | Tornado Warning | BOU | Weld | 27 min |
| Aug 12, 5:54 PM MDT | Severe Thunderstorm Warning | BOU | Morgan | 51 min |
| Aug 12, 5:57 PM MDT | Areal Flood Advisory | BOU | Elbert | 104 min |
Nearby
Severe Thunderstorm Warnings in Colorado, 2024Every severe thunderstorm warning in 2024
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.