Alert archive / Colorado / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 108, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this severe thunderstorm warning at Jul 15, 2021, 3:38 PM MDT for Lincoln County, Colorado. It was in force for 52 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
- Jul 15, 2021, 3:38 PM MDT (21:38 UTC)
- Expired
- Jul 15, 2021, 4:30 PM MDT
- In force
- 52 min
- Issued by
- NWS Denver/Boulder, CO
- Area
- Storm-based polygon
- Hail
- 1.5 in
- Wind
- 60.0 mph
County Lincoln County, CO
The radar
The Pueblo radar (KPUX), 66 km from the middle of the area, began a volume at 21:41 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 |
|---|---|---|---|
| Jul 15, 4:00 PM MDT | TSTM WND DMG | 5 S Karval, CO | A FEW BRANCHES DOWN. SPOTTER ESTIMATED GUSTS UP TO 60MPH. TIME ESTIMATED BY RADAR. |
| Jul 15, 4:00 PM MDT | HAIL 2 | 5 S Karval, CO | SPOTTER REPORT OF A FEW HEN EGG SIZED HAILSTONES. TIME ESTIMATED BY RADAR. |
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 12:00Z, 9.6 hours before the alert went out and 139 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
- 6 J/kg
- Mixed-layer CIN
- -427 J/kg
- Mixed-layer LCL
- 1726 m above ground
- 0-6 km bulk shear
- 25 kt
- 0-1 km storm-relative helicity
- 23 m²/s²
- 0-3 km storm-relative helicity
- 45 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
506
WUUS55 KBOU 152138
SVRBOU
COC073-152230-
/O.NEW.KBOU.SV.W.0108.210715T2138Z-210715T2230Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Denver CO
338 PM MDT Thu Jul 15 2021
The National Weather Service in Denver Colorado has issued a
* Severe Thunderstorm Warning for...
Southeastern Lincoln County in east central Colorado...
* Until 430 PM MDT.
* At 337 PM MDT, a severe thunderstorm was located 5 miles northeast
of Karval, or 34 miles south of Limon, moving south at 15 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...
Karval and Wild Horse Point.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3852 10361 3876 10358 3881 10328 3853 10319
TIME...MOT...LOC 2137Z 000DEG 12KT 3879 10348
HAIL...1.50IN
WIND...60MPH
$$
ENTREKIN2 follow-up statements
337
WWUS55 KBOU 152202
SVSBOU
Severe Weather Statement
National Weather Service Denver CO
402 PM MDT Thu Jul 15 2021
COC073-152230-
/O.CON.KBOU.SV.W.0108.000000T0000Z-210715T2230Z/
Lincoln CO-
402 PM MDT Thu Jul 15 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 430 PM MDT
FOR SOUTHEASTERN LINCOLN COUNTY...
At 402 PM MDT, a severe thunderstorm was located 5 miles north of
Wild Horse Point, or 44 miles north of North La Junta, moving south
at 20 mph.
HAZARD...Golf ball size hail and 60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees. People and
animals outdoors will be injured. Expect hail damage to
roofs, siding, windows, and vehicles.
Locations impacted include...
Wild Horse Point.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3852 10361 3869 10357 3870 10338 3853 10319
TIME...MOT...LOC 2202Z 004DEG 18KT 3864 10350
HAIL...1.75IN
WIND...60MPH
$$
ENTREKIN704
WWUS55 KBOU 152229
SVSBOU
Severe Weather Statement
National Weather Service Denver CO
429 PM MDT Thu Jul 15 2021
COC073-152236-
/O.EXP.KBOU.SV.W.0108.000000T0000Z-210715T2230Z/
Lincoln CO-
429 PM MDT Thu Jul 15 2021
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN LINCOLN COUNTY
WILL EXPIRE AT 430 PM MDT...
The storm which prompted the warning has moved out of the area.
Therefore, the warning will be allowed to expire. However small
hail, gusty winds and heavy rain are still possible with this
thunderstorm until 445 pm.
Earlier at 4 pm, a trained spotter 6 miles south of Karval, reported
2 inch diameter hail along with estimated winds up to 60 mph.
LAT...LON 3852 10361 3869 10357 3870 10338 3853 10319
TIME...MOT...LOC 2226Z 000DEG 12KT 3864 10350
$$
ENTREKINThe office that day
Everything else NWS Denver/Boulder, CO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 14, 6:06 PM MDT | Special Weather Statement | BOU | Weld | 24 min |
| Jul 14, 6:29 PM MDT | Special Weather Statement | BOU | Morgan | 31 min |
| Jul 14, 6:47 PM MDT | Areal Flood Advisory | BOU | Denver | 88 min |
| Jul 14, 7:39 PM MDT | Areal Flood Advisory | BOU | Morgan | 72 min |
| Jul 15, 1:37 PM MDT | Severe Thunderstorm Warning | BOU | Lincoln | 38 min |
| Jul 15, 2:42 PM MDT | Special Weather Statement | BOU | Lincoln | 48 min |
| Jul 15, 2:59 PM MDT | Severe Thunderstorm Warning | BOU | Lincoln | 46 min |
| Jul 15, 3:19 PM MDT | Special Weather Statement | BOU | Washington | 26 min |
| Jul 15, 5:01 PM MDT | Severe Thunderstorm Warning | BOU | Weld | 44 min |
| Jul 15, 5:44 PM MDT | Severe Thunderstorm Warning | BOU | Weld | 29 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.