Alert archive / Colorado / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 19, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this severe thunderstorm warning at May 14, 2021, 5:20 PM MDT for 4 counties in Colorado. It was in force for 25 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, 5:20 PM MDT (23:20 UTC)
- Expired
- May 14, 2021, 5:45 PM MDT
- In force
- 25 min
- Issued by
- NWS Denver/Boulder, CO
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Arapahoe County, CO, Elbert County, CO, Lincoln County, CO, Washington County, CO
The radar
The Denver radar (KFTG), 73 km from the middle of the area, began a volume at 23:22 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 watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| May 14, 3:46 PM MDT | Severe Thunderstorm Watch | SPC | 6 hr |
The nearest sounding before it
Denver, CO (KDNR), launched 12:00Z, 11.3 hours before the alert went out and 52 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
- 1782 m above ground
- 0-6 km bulk shear
- 35 kt
- 0-1 km storm-relative helicity
- -17 m²/s²
- 0-3 km storm-relative helicity
- 188 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
382
WUUS55 KBOU 142320
SVRBOU
COC005-039-073-121-142345-
/O.NEW.KBOU.SV.W.0019.210514T2320Z-210514T2345Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Denver CO
520 PM MDT Fri May 14 2021
The National Weather Service in Denver Colorado has issued a
* Severe Thunderstorm Warning for...
Northeastern Elbert County in east central Colorado...
Eastern Arapahoe County in northeastern Colorado...
Southwestern Washington County in northeastern Colorado...
North central Lincoln County in east central Colorado...
* Until 545 PM MDT.
* At 519 PM MDT, a severe thunderstorm was located over Cottonwood
Valley, or 27 miles north of Limon, 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...
Cottonwood Valley.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3937 10386 3974 10389 3974 10371 3976 10371
3963 10334
TIME...MOT...LOC 2319Z 322DEG 28KT 3965 10378
HAIL...1.00IN
WIND...60MPH
$$
DIRENZO1 follow-up statement
030
WWUS55 KBOU 142347
SVSBOU
Severe Weather Statement
National Weather Service Denver CO
547 PM MDT Fri May 14 2021
COC005-039-073-121-142356-
/O.EXP.KBOU.SV.W.0019.000000T0000Z-210514T2345Z/
Elbert CO-Arapahoe CO-Washington CO-Lincoln CO-
547 PM MDT Fri May 14 2021
...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN ELBERT...EASTERN
ARAPAHOE...SOUTHWESTERN WASHINGTON AND NORTH CENTRAL LINCOLN COUNTIES
HAS EXPIRED...
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning has been allowed to expire.
A Severe Thunderstorm Watch remains in effect until 1000 PM MDT for
northeastern and east central Colorado.
LAT...LON 3937 10386 3974 10389 3974 10371 3976 10371
3963 10334
TIME...MOT...LOC 2346Z 322DEG 28KT 3949 10362
$$
DIRENZOThe office that day
Everything else NWS Denver/Boulder, CO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 14, 1:46 PM MDT | Special Weather Statement | BOU | Elbert | 44 min |
| May 14, 2:29 PM MDT | Special Weather Statement | BOU | Elbert | 46 min |
| May 14, 3:26 PM MDT | Special Weather Statement | BOU | Washington | 49 min |
| May 14, 3:29 PM MDT | Special Weather Statement | BOU | Jefferson | 31 min |
| May 14, 3:33 PM MDT | Severe Thunderstorm Warning | BOU | Elbert, Lincoln | 42 min |
| May 14, 4:27 PM MDT | Special Weather Statement | BOU | Lincoln | 18 min |
| May 14, 4:40 PM MDT | Special Weather Statement | BOU | Weld | 35 min |
| May 14, 4:53 PM MDT | Special Weather Statement | BOU | Washington | 37 min |
| May 14, 5:52 PM MDT | Special Weather Statement | BOU | Crowley | 23 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.