Alert archive / Colorado / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 154, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this severe thunderstorm warning at Sep 12, 2021, 5:27 PM MDT for Lincoln County, Colorado. It was in force for 33 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
- Sep 12, 2021, 5:27 PM MDT (23:27 UTC)
- Expired
- Sep 12, 2021, 6:00 PM MDT
- In force
- 33 min
- Issued by
- NWS Denver/Boulder, CO
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
County Lincoln County, CO
The radar
The Pueblo radar (KPUX), 93 km from the middle of the area, began a volume at 23:30 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 nearest sounding before it
Denver, CO (KDNR), launched 12:00Z, 11.5 hours before the alert went out and 99 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
- 9 J/kg
- Mixed-layer CIN
- -377 J/kg
- Mixed-layer LCL
- 2276 m above ground
- 0-6 km bulk shear
- 40 kt
- 0-1 km storm-relative helicity
- 25 m²/s²
- 0-3 km storm-relative helicity
- 41 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
332 WUUS55 KBOU 122327 SVRBOU COC073-130000- /O.NEW.KBOU.SV.W.0154.210912T2327Z-210913T0000Z/ BULLETIN - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Warning National Weather Service Denver CO 527 PM MDT Sun Sep 12 2021 The National Weather Service in Denver Colorado has issued a * Severe Thunderstorm Warning for... East central Lincoln County in east central Colorado... * Until 600 PM MDT. * At 526 PM MDT, a severe thunderstorm was located 8 miles northwest of Boyero, or 24 miles southeast of Limon, moving east at 40 mph. HAZARD...60 mph wind gusts. SOURCE...Radar indicated. IMPACT...Expect damage to roofs, siding, and trees. * This severe thunderstorm will be near... Boyero around 540 PM MDT. PRECAUTIONARY/PREPAREDNESS ACTIONS... For your protection move to an interior room on the lowest floor of a building. && LAT...LON 3879 10347 3927 10348 3934 10316 3873 10317 TIME...MOT...LOC 2326Z 273DEG 33KT 3900 10339 HAIL THREAT...RADAR INDICATED MAX HAIL SIZE...<.75 IN WIND THREAT...RADAR INDICATED MAX WIND GUST...60 MPH $$ RJK
The office that day
Everything else NWS Denver/Boulder, CO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 11, 7:04 PM MDT | Severe Thunderstorm Warning | BOU | Logan | 26 min |
| Sep 11, 7:25 PM MDT | Severe Thunderstorm Warning | BOU | Logan | 50 min |
| Sep 11, 8:04 PM MDT | Special Weather Statement | BOU | Sedgwick | 26 min |
| Sep 11, 8:14 PM MDT | Special Weather Statement | BOU | Denver | 16 min |
| Sep 11, 8:31 PM MDT | Special Weather Statement | BOU | Denver | 29 min |
| Sep 12, 3:38 PM MDT | Special Weather Statement | BOU | Elbert | 52 min |
| Sep 12, 4:16 PM MDT | Special Weather Statement | BOU | Lincoln | 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.