Alert archive / Colorado / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 118, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this severe thunderstorm warning at Aug 7, 2021, 2:29 PM MDT for Lincoln County, Colorado. It was in force for 33 min. 1 report 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
- Aug 7, 2021, 2:29 PM MDT (20:29 UTC)
- Expired
- Aug 7, 2021, 3:02 PM MDT
- In force
- 33 min
- Issued by
- NWS Denver/Boulder, CO
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
County Lincoln County, CO
The radar
The Pueblo radar (KPUX), 85 km from the middle of the area, began a volume at 20:31 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 |
|---|---|---|---|
| Aug 7, 2:30 PM MDT | HAIL 1.25 | 6 W Boyero, 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 12:00Z, 8.5 hours before the alert went out and 108 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
- 90 J/kg
- Mixed-layer CIN
- -282 J/kg
- Mixed-layer LCL
- 2495 m above ground
- 0-6 km bulk shear
- 36 kt
- 0-1 km storm-relative helicity
- 18 m²/s²
- 0-3 km storm-relative helicity
- 114 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
880
WUUS55 KBOU 072029
SVRBOU
COC073-072115-
/O.NEW.KBOU.SV.W.0118.210807T2029Z-210807T2115Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Denver CO
229 PM MDT Sat Aug 7 2021
The National Weather Service in Denver Colorado has issued a
* Severe Thunderstorm Warning for...
East central Lincoln County in east central Colorado...
* Until 315 PM MDT.
* At 229 PM MDT, a severe thunderstorm was located 8 miles west of
Boyero, or 27 miles southeast of Limon, moving east 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...
Boyero.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3884 10351 3893 10353 3902 10346 3902 10332
3897 10317 3872 10317
TIME...MOT...LOC 2029Z 291DEG 22KT 3893 10342
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
RJK2 follow-up statements
249
WWUS55 KBOU 072045
SVSBOU
Severe Weather Statement
National Weather Service Denver CO
245 PM MDT Sat Aug 7 2021
COC073-072115-
/O.CON.KBOU.SV.W.0118.000000T0000Z-210807T2115Z/
Lincoln CO-
245 PM MDT Sat Aug 7 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 315 PM MDT
FOR EAST CENTRAL LINCOLN COUNTY...
At 244 PM MDT, a severe thunderstorm was located over Boyero, or 28
miles south of Flagler, moving east at 30 mph.
HAZARD...Half dollar size hail.
SOURCE...Trained weather spotters.
IMPACT...Damage to vehicles is expected.
Locations impacted include...
Boyero.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3881 10331 3888 10337 3896 10335 3900 10328
3897 10317 3878 10317
TIME...MOT...LOC 2044Z 286DEG 24KT 3891 10327
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.25 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...<50 MPH
$$
RJK551
WWUS55 KBOU 072102
SVSBOU
Severe Weather Statement
National Weather Service Denver CO
302 PM MDT Sat Aug 7 2021
COC073-072110-
/O.CAN.KBOU.SV.W.0118.000000T0000Z-210807T2115Z/
Lincoln CO-
302 PM MDT Sat Aug 7 2021
...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL LINCOLN COUNTY IS
CANCELLED...
The storm which prompted the warning has moved out of the area.
Therefore, the warning has been cancelled. The storm produced 1.25
inch hail at 2:30 PM MDT 6 miles west of Boyero in Lincoln County.
LAT...LON 3881 10331 3888 10337 3896 10335 3900 10328
3897 10317 3878 10317
TIME...MOT...LOC 2059Z 291DEG 22KT 3887 10315
$$
RJKThe office that day
Everything else NWS Denver/Boulder, CO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 6, 6:15 PM MDT | Special Weather Statement | BOU | Logan | 45 min |
| Aug 6, 6:24 PM MDT | Special Weather Statement | BOU | Jackson | 36 min |
| Aug 6, 6:53 PM MDT | Flash Flood Warning | BOU | Larimer | 2 hr |
| Aug 6, 7:36 PM MDT | Special Weather Statement | BOU | Larimer | 24 min |
| Aug 6, 7:58 PM MDT | Areal Flood Advisory | BOU | Larimer | 2 hr |
| Aug 6, 10:06 PM MDT | Areal Flood Advisory | BOU | Larimer | 84 min |
| Aug 7, 1:08 PM MDT | Special Weather Statement | BOU | Lincoln | 52 min |
| Aug 7, 1:48 PM MDT | Severe Thunderstorm Warning | BOU | Elbert, Lincoln | 42 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.