Alert archive / Colorado / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 25, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this severe thunderstorm warning at May 14, 2021, 8:52 PM MDT for Morgan County, Colorado. It was in force for 38 min. 3 reports came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- May 14, 2021, 8:52 PM MDT (02:52 UTC)
- Expired
- May 14, 2021, 9:30 PM MDT
- In force
- 38 min
- Issued by
- NWS Denver/Boulder, CO
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
County Morgan County, CO
The radar
The Denver radar (KFTG), 68 km from the middle of the area, began a volume at 02:55 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 was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| May 14, 8:58 PM MDT | HAIL 1 | 1 S Wiggins, CO | |
| May 14, 9:01 PM MDT | HAIL 1 | 2 Nne Wiggins, CO | |
| May 14, 9:05 PM MDT | HAIL 1.9 | 4 Ene Wiggins, CO | REPORT VIA TWITTER. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Denver, CO (KDNR), launched 00:00Z, 2.9 hours before the alert went out and 65 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.
474
WUUS55 KBOU 150252
SVRBOU
COC087-150330-
/O.NEW.KBOU.SV.W.0025.210515T0252Z-210515T0330Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Denver CO
852 PM MDT Fri May 14 2021
The National Weather Service in Denver Colorado has issued a
* Severe Thunderstorm Warning for...
Southwestern Morgan County in northeastern Colorado...
* Until 930 PM MDT.
* At 852 PM MDT, a severe thunderstorm was located near Wiggins, or
12 miles west of Fort Morgan, moving southeast at 30 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Trained weather spotters.
IMPACT...Expect damage to roofs, siding, and trees. Hail damage to
vehicles is expected.
* Locations impacted include...
Wiggins, Hoyt, Orchard, Weldona, Adena, Twelve-Mile Corner, Jackson
Reservoir, Adena School and Goodrich.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
This storm is producing large hail. SEEK SHELTER NOW inside a sturdy
structure and stay away from windows!
&&
LAT...LON 4000 10358 4000 10415 4035 10415 4042 10405
TIME...MOT...LOC 0252Z 323DEG 26KT 4026 10403
HAIL...1.00IN
WIND...60MPH
$$
DIRENZO1 follow-up statement
478
WWUS55 KBOU 150317
SVSBOU
Severe Weather Statement
National Weather Service Denver CO
917 PM MDT Fri May 14 2021
COC087-150330-
/O.CON.KBOU.SV.W.0025.000000T0000Z-210515T0330Z/
Morgan CO-
917 PM MDT Fri May 14 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 930 PM MDT
FOR SOUTHWESTERN MORGAN COUNTY...
At 917 PM MDT, a severe thunderstorm was located 4 miles west of
Adena School, or 10 miles southwest of Fort Morgan, moving southeast
at 30 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Trained weather spotters.
IMPACT...Expect damage to roofs, siding, and trees. Hail damage to
vehicles is expected.
Locations impacted include...
Twelve-Mile Corner, Adena School and Adena.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
This storm is producing large hail. SEEK SHELTER NOW inside a sturdy
structure and stay away from windows.
&&
LAT...LON 4000 10358 4000 10404 4024 10404 4028 10391
TIME...MOT...LOC 0317Z 323DEG 26KT 4011 10389
HAIL...1.00IN
WIND...60MPH
$$
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, 7:36 PM MDT | Severe Thunderstorm Warning | BOU | Weld | 39 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, 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.