Alert archive / Colorado / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 93, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this severe thunderstorm warning at Jul 3, 2021, 3:23 PM MDT for Weld County, Colorado. It was in force for 37 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
- Jul 3, 2021, 3:23 PM MDT (21:23 UTC)
- Expired
- Jul 3, 2021, 4:00 PM MDT
- In force
- 37 min
- Issued by
- NWS Denver/Boulder, CO
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 50.0 mph
County Weld County, CO
The radar
The Cheyenne radar (KCYS), 85 km from the middle of the area, began a volume at 21:24 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, 9.4 hours before the alert went out and 112 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
- 2605 m above ground
- 0-6 km bulk shear
- 20 kt
- 0-1 km storm-relative helicity
- 26 m²/s²
- 0-3 km storm-relative helicity
- 31 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
685
WUUS55 KBOU 032123
SVRBOU
COC123-032200-
/O.NEW.KBOU.SV.W.0093.210703T2123Z-210703T2200Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Denver CO
323 PM MDT Sat Jul 3 2021
The National Weather Service in Denver Colorado has issued a
* Severe Thunderstorm Warning for...
Central Weld County in northeastern Colorado...
* Until 400 PM MDT.
* At 322 PM MDT, a severe thunderstorm was located 6 miles northeast
of Barnesville, or 21 miles east of Greeley, moving southeast at 25
mph.
HAZARD...Quarter size hail.
SOURCE...Radar indicated.
IMPACT...Damage to vehicles is expected.
* Locations impacted include...
Briggsdale.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4053 10408 4052 10415 4042 10415 4030 10434
4060 10456 4072 10436
TIME...MOT...LOC 2122Z 321DEG 22KT 4053 10437
HAIL...1.00IN
WIND...<50MPH
$$
RPK2 follow-up statements
574
WWUS55 KBOU 032136
SVSBOU
Severe Weather Statement
National Weather Service Denver CO
336 PM MDT Sat Jul 3 2021
COC123-032200-
/O.CON.KBOU.SV.W.0093.000000T0000Z-210703T2200Z/
Weld CO-
336 PM MDT Sat Jul 3 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 400 PM MDT
FOR CENTRAL WELD COUNTY...
At 336 PM MDT, a severe thunderstorm was located 9 miles east of
Barnesville, or 23 miles east of Greeley, moving southeast at 25 mph.
HAZARD...Quarter size hail.
SOURCE...Radar indicated.
IMPACT...Damage to vehicles is expected.
Locations impacted include...
Briggsdale.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4053 10408 4052 10415 4042 10415 4030 10434
4060 10456 4072 10436
TIME...MOT...LOC 2136Z 321DEG 22KT 4046 10430
HAIL...1.00IN
WIND...<50MPH
$$
RPK930
WWUS55 KBOU 032200
SVSBOU
Severe Weather Statement
National Weather Service Denver CO
400 PM MDT Sat Jul 3 2021
COC123-032210-
/O.EXP.KBOU.SV.W.0093.000000T0000Z-210703T2200Z/
Weld CO-
400 PM MDT Sat Jul 3 2021
...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL WELD COUNTY HAS
EXPIRED...
The storm which prompted the warning has moved out of the area.
Therefore, the warning has been allowed to expire.
A Severe Thunderstorm Watch remains in effect until 1000 PM MDT for
northeastern Colorado.
LAT...LON 4053 10408 4052 10415 4042 10415 4030 10434
4060 10456 4072 10436
TIME...MOT...LOC 2200Z 321DEG 22KT 4035 10419
$$
RPKThe office that day
Everything else NWS Denver/Boulder, CO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 2, 6:36 PM MDT | Special Weather Statement | BOU | Denver | 24 min |
| Jul 2, 6:42 PM MDT | Severe Thunderstorm Warning | BOU | Adams, Weld | 33 min |
| Jul 2, 7:11 PM MDT | Areal Flood Advisory | BOU | Adams | 47 min |
| Jul 2, 7:13 PM MDT | Special Weather Statement | BOU | Denver | 32 min |
| Jul 2, 7:17 PM MDT | Areal Flood Advisory | BOU | Larimer | 88 min |
| Jul 3, 2:03 PM MDT | Areal Flood Advisory | BOU | Larimer | 87 min |
| Jul 3, 2:22 PM MDT | Special Weather Statement | BOU | Weld | 38 min |
| Jul 3, 3:11 PM MDT | Special Weather Statement | BOU | Weld | 34 min |
| Jul 3, 3:57 PM MDT | Severe Thunderstorm Warning | BOU | Morgan, Weld | 33 min |
| Jul 3, 4:25 PM MDT | Special Weather Statement | BOU | Logan | 20 min |
| Jul 3, 4:34 PM MDT | Special Weather Statement | BOU | Logan | 26 min |
| Jul 3, 4:45 PM MDT | Special Weather Statement | BOU | Morgan | 30 min |
| Jul 3, 4:53 PM MDT | Severe Thunderstorm Warning | BOU | Washington | 37 min |
| Jul 3, 4:59 PM MDT | Severe Thunderstorm Warning | BOU | Logan | 31 min |
| Jul 3, 5:05 PM MDT | Severe Thunderstorm Warning | BOU | Logan | 25 min |
| Jul 3, 5:14 PM MDT | Special Weather Statement | BOU | Elbert | 31 min |
| Jul 3, 5:20 PM MDT | Severe Thunderstorm Warning | BOU | Elbert | 25 min |
| Jul 3, 5:29 PM MDT | Severe Thunderstorm Warning | BOU | Washington | 31 min |
| Jul 3, 5:38 PM MDT | Areal Flood Advisory | BOU | Logan | 82 min |
| Jul 3, 5:40 PM MDT | Areal Flood Advisory | BOU | Elbert | 95 min |
| Jul 3, 5:56 PM MDT | Severe Thunderstorm Warning | BOU | Washington | 34 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.