Alert archive / Colorado / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 22, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this severe thunderstorm warning at May 14, 2021, 7:36 PM MDT for Weld County, Colorado. It was in force for 39 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- May 14, 2021, 7:36 PM MDT (01:36 UTC)
- Expired
- May 14, 2021, 8:15 PM MDT
- In force
- 39 min
- Issued by
- NWS Denver/Boulder, CO
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
County Weld County, CO
The radar
The Cheyenne radar (KCYS), 82 km from the middle of the area, began a volume at 01:37 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
Denver, CO (KDNR), launched 00:00Z, 1.6 hours before the alert went out and 114 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
- 137 J/kg
- Mixed-layer CIN
- -133 J/kg
- Mixed-layer LCL
- 1940 m above ground
- 0-6 km bulk shear
- 36 kt
- 0-1 km storm-relative helicity
- 42 m²/s²
- 0-3 km storm-relative helicity
- 135 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.2
The text
As transmitted.
018
WUUS55 KBOU 150136
SVRBOU
COC123-150215-
/O.NEW.KBOU.SV.W.0022.210515T0136Z-210515T0215Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Denver CO
736 PM MDT Fri May 14 2021
The National Weather Service in Denver Colorado has issued a
* Severe Thunderstorm Warning for...
Central Weld County in northeastern Colorado...
* Until 815 PM MDT.
* At 735 PM MDT, a severe thunderstorm was located 5 miles north of
Briggsdale, or 28 miles northeast of Greeley, moving southeast at
30 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees. Hail damage to
vehicles is expected.
* Locations impacted include...
Kersey, Grover, Purcell, Galeton, Keota, Gill, Briggsdale, Pawnee
Buttes and Barnesville.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4074 10372 4052 10405 4052 10415 4046 10415
4022 10451 4071 10465 4095 10430
TIME...MOT...LOC 0135Z 317DEG 26KT 4072 10437
HAIL...1.00IN
WIND...60MPH
$$
DIRENZO1 follow-up statement
349
WWUS55 KBOU 150157
SVSBOU
Severe Weather Statement
National Weather Service Denver CO
757 PM MDT Fri May 14 2021
COC123-150215-
/O.CON.KBOU.SV.W.0022.000000T0000Z-210515T0215Z/
Weld CO-
757 PM MDT Fri May 14 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 815 PM MDT
FOR CENTRAL WELD COUNTY...
At 756 PM MDT, a severe thunderstorm was located 5 miles east of
Briggsdale, or 30 miles northeast of Greeley, moving southeast at 30
mph.
HAZARD...Ping pong ball size hail and 60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees. People and
animals outdoors will be injured. Expect hail damage to
roofs, siding, windows, and vehicles.
Locations impacted include...
Kersey, Keota, Gill, Briggsdale and Barnesville.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4074 10372 4052 10405 4052 10415 4046 10415
4022 10451 4063 10460 4086 10426
TIME...MOT...LOC 0156Z 317DEG 26KT 4060 10423
HAIL...1.50IN
WIND...60MPH
$$
DIRENZOThe office that day
Everything else NWS Denver/Boulder, CO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 14, 6:49 PM MDT | Severe Thunderstorm Warning | BOU | Weld | 41 min |
| May 14, 6:52 PM MDT | Special Weather Statement | BOU | Morgan | 38 min |
| May 14, 7:17 PM MDT | Severe Thunderstorm Warning | BOU | Morgan, Washington | 28 min |
| May 14, 7:40 PM MDT | Severe Thunderstorm Warning | BOU | Morgan, Washington | 50 min |
| May 14, 8:14 PM MDT | Severe Thunderstorm Warning | BOU | Morgan, Weld | 46 min |
| May 14, 8:52 PM MDT | Severe Thunderstorm Warning | BOU | Morgan | 38 min |
| May 14, 9:29 PM MDT | Severe Thunderstorm Warning | BOU | Adams, Morgan, Washington | 46 min |
| May 15, 2:21 PM MDT | Special Weather Statement | BOU | Larimer | 24 min |
| May 15, 2:50 PM MDT | Special Weather Statement | BOU | Denver | 25 min |
| May 15, 5:29 PM MDT | Special Weather Statement | BOU | Douglas | 31 min |
Nearby
Severe Thunderstorm Warnings in Colorado, 2021Every severe thunderstorm warning in 2021
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.