Alert archive / Colorado / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 149, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this severe thunderstorm warning at Aug 25, 2021, 11:50 PM MDT for Logan County, Morgan County, Weld County, Colorado. It was in force for 40 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
- Aug 25, 2021, 11:50 PM MDT (05:50 UTC)
- Expired
- Aug 26, 2021, 12:30 AM MDT
- In force
- 40 min
- Issued by
- NWS Denver/Boulder, CO
- Area
- Storm-based polygon
- Hail
- 1.25 in
- Wind
- 50.0 mph
Counties Logan County, CO, Morgan County, CO, Weld County, CO
The radar
The Denver radar (KFTG), 114 km from the middle of the area, began a volume at 05:51 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 00:00Z, 5.8 hours before the alert went out and 81 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
- 515 J/kg
- Mixed-layer CIN
- -166 J/kg
- Mixed-layer LCL
- 2368 m above ground
- 0-6 km bulk shear
- 39 kt
- 0-1 km storm-relative helicity
- 15 m²/s²
- 0-3 km storm-relative helicity
- 197 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.3
The text
As transmitted.
555 WUUS55 KBOU 260550 SVRBOU COC075-087-123-260630- /O.NEW.KBOU.SV.W.0149.210826T0550Z-210826T0630Z/ BULLETIN - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Warning National Weather Service Denver CO 1150 PM MDT Wed Aug 25 2021 The National Weather Service in Denver Colorado has issued a * Severe Thunderstorm Warning for... Eastern Weld County in northeastern Colorado... Northeastern Morgan County in northeastern Colorado... Southwestern Logan County in northeastern Colorado... * Until 1230 AM MDT. * At 1150 PM MDT, a severe thunderstorm was located 4 miles north of Antelope Springs, or 16 miles north of Fort Morgan, moving northeast at 20 mph. HAZARD...Half dollar size hail. SOURCE...Radar indicated. IMPACT...Damage to vehicles is expected. * This severe thunderstorm will be near... Stoneham around 1205 AM MDT. Other locations in the path of this severe thunderstorm include Willard and Pawnee Pass. PRECAUTIONARY/PREPAREDNESS ACTIONS... For your protection move to an interior room on the lowest floor of a building. && LAT...LON 4043 10373 4056 10384 4077 10351 4048 10334 TIME...MOT...LOC 0550Z 243DEG 19KT 4049 10372 HAIL THREAT...RADAR INDICATED MAX HAIL SIZE...1.25 IN WIND THREAT...RADAR INDICATED MAX WIND GUST...<50 MPH $$ ENTREKIN
The office that day
Everything else NWS Denver/Boulder, CO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 25, 11:43 PM MDT | Special Weather Statement | BOU | Morgan | 47 min |
| Aug 26, 12:24 AM MDT | Special Weather Statement | BOU | Morgan | 51 min |
| Aug 26, 1:45 AM MDT | Special Weather Statement | BOU | Morgan | 45 min |
| Aug 26, 2:52 PM MDT | Severe Thunderstorm Warning | BOU | Lincoln | 38 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.