Alert archive / Colorado / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 24, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this severe thunderstorm warning at May 14, 2021, 8:14 PM MDT for Morgan County, Weld County, Colorado. It was in force for 46 min. 2 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, 8:14 PM MDT (02:14 UTC)
- Expired
- May 14, 2021, 9:00 PM MDT
- In force
- 46 min
- Issued by
- NWS Denver/Boulder, CO
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Morgan County, CO, Weld County, CO
The radar
The Denver radar (KFTG), 80 km from the middle of the area, began a volume at 02:15 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, 8:40 PM MDT | HAIL 1 | 1 W Jackson Reservoir, CO | |
| May 14, 9:01 PM MDT | HAIL 1 | 2 Nne Wiggins, CO |
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, 2.2 hours before the alert went out and 104 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.
104
WUUS55 KBOU 150214
SVRBOU
COC087-123-150300-
/O.NEW.KBOU.SV.W.0024.210515T0214Z-210515T0300Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Denver CO
814 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...
Northwestern Morgan County in northeastern Colorado...
* Until 900 PM MDT.
* At 814 PM MDT, a severe thunderstorm was located 10 miles southeast
of Briggsdale, or 28 miles northwest of Fort Morgan, moving
southeast at 25 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...
Orchard, Weldona, Jackson Reservoir, Riverside Reservoir, Goodrich,
Roggen and New Raymer.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4048 10443 4069 10408 4053 10359 4007 10439
TIME...MOT...LOC 0214Z 328DEG 20KT 4052 10420
HAIL...1.00IN
WIND...60MPH
$$
DIRENZO1 follow-up statement
926
WWUS55 KBOU 150238
SVSBOU
Severe Weather Statement
National Weather Service Denver CO
838 PM MDT Fri May 14 2021
COC087-123-150300-
/O.CON.KBOU.SV.W.0024.000000T0000Z-210515T0300Z/
Weld CO-Morgan CO-
838 PM MDT Fri May 14 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 900 PM MDT
FOR SOUTH CENTRAL WELD AND NORTHWESTERN MORGAN COUNTIES...
At 838 PM MDT, a severe thunderstorm was located over Orchard, or 16
miles west of Fort Morgan, moving southeast at 40 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees. Hail damage to
vehicles is expected.
Locations impacted include...
Jackson Reservoir, Orchard, Riverside Reservoir, Weldona and
Goodrich.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4041 10431 4050 10425 4052 10413 4044 10375
4013 10429
TIME...MOT...LOC 0238Z 330DEG 35KT 4033 10409
HAIL...1.00IN
WIND...60MPH
$$
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, 8:52 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.