Alert archive / Colorado / Severe Thunderstorm Warnings in 2023
Severe Thunderstorm Warning 55, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this severe thunderstorm warning at May 28, 2023, 3:58 PM MDT for Weld County, Colorado. It was in force for 32 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
- May 28, 2023, 3:58 PM MDT (21:58 UTC)
- Expired
- May 28, 2023, 4:30 PM MDT
- In force
- 32 min
- Issued by
- NWS Denver/Boulder, CO
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 50.0 mph
County Weld County, CO
The radar
The Cheyenne radar (KCYS), 75 km from the middle of the area, began a volume at 22:00 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 nearest sounding before it
N. Platte/Lee Bi, NE (KLBF), launched 12:00Z, 10.0 hours before the alert went out and 325 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1167 m above ground
- 0-6 km bulk shear
- 26 kt
- 0-1 km storm-relative helicity
- -183 m²/s²
- 0-3 km storm-relative helicity
- -25 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The office that day
Everything else NWS Denver/Boulder, CO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 27, 8:26 PM MDT | Areal Flood Advisory | BOU | Morgan, Weld | 3 hr |
| May 27, 8:29 PM MDT | Special Weather Statement | BOU | Douglas | 46 min |
| May 27, 9:11 PM MDT | Severe Thunderstorm Warning | BOU | Elbert | 17 min |
| May 27, 10:43 PM MDT | Areal Flood Advisory | BOU | Logan, Washington | 3 hr |
| May 27, 11:21 PM MDT | Areal Flood Advisory | BOU | Adams, Morgan, Washington | 3 hr |
| May 27, 11:45 PM MDT | Areal Flood Advisory | BOU | Phillips | 3 hr |
| May 28, 2:42 PM MDT | Special Weather Statement | BOU | Boulder | 33 min |
| May 28, 2:53 PM MDT | Special Weather Statement | BOU | Larimer | 37 min |
| May 28, 3:22 PM MDT | Special Weather Statement | BOU | Broomfield | 38 min |
| May 28, 3:27 PM MDT | Severe Thunderstorm Warning | BOU | Weld | 33 min |
| May 28, 5:04 PM MDT | Severe Thunderstorm Warning | BOU | Weld | 26 min |
| May 28, 5:29 PM MDT | Severe Thunderstorm Warning | BOU | Logan, Morgan, Weld | 31 min |
| May 28, 5:58 PM MDT | Severe Thunderstorm Warning | BOU | Logan, Washington | 47 min |
Nearby
Severe Thunderstorm Warnings in Colorado, 2023Every 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.