Alert archive / Colorado / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 53, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this severe thunderstorm warning at May 29, 2021, 2:07 PM MDT for Douglas County, Colorado. It was in force for 23 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
- May 29, 2021, 2:07 PM MDT (20:07 UTC)
- Expired
- May 29, 2021, 2:30 PM MDT
- In force
- 23 min
- Issued by
- NWS Denver/Boulder, CO
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 50.0 mph
County Douglas County, CO
The radar
The Denver radar (KFTG), 65 km from the middle of the area, began a volume at 20:09 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 |
|---|---|---|---|
| May 29, 2:11 PM MDT | HAIL 0.75 | 8 Se Castlewood Canyon, CO | REPORT FROM MPING: DIME (0.75 IN.). |
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, 8.1 hours before the alert went out and 151 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
- 2325 m above ground
- 0-6 km bulk shear
- 20 kt
- 0-1 km storm-relative helicity
- -78 m²/s²
- 0-3 km storm-relative helicity
- 92 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
174 WUUS55 KBOU 292007 SVRBOU COC035-292030- /O.NEW.KBOU.SV.W.0053.210529T2007Z-210529T2030Z/ BULLETIN - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Warning National Weather Service Denver CO 207 PM MDT Sat May 29 2021 The National Weather Service in Denver Colorado has issued a * Severe Thunderstorm Warning for... Southeastern Douglas County in northeastern Colorado... * Until 230 PM MDT. * At 207 PM MDT, a severe thunderstorm was located 6 miles east of Greenland, or 24 miles north of Colorado Springs, moving northwest at 25 mph. HAZARD...Quarter size hail. SOURCE...Radar indicated. IMPACT...Damage to vehicles is expected. * Locations impacted include... Greenland. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Tornado Watch remains in effect until 900 PM MDT for east central Colorado. For your protection move to an interior room on the lowest floor of a building. && LAT...LON 3919 10487 3931 10487 3931 10466 3914 10467 TIME...MOT...LOC 2007Z 125DEG 22KT 3922 10474 HAIL...1.00IN WIND...<50MPH $$ SCHLATTER
1 follow-up statement
390
WWUS55 KBOU 292030
SVSBOU
Severe Weather Statement
National Weather Service Denver CO
230 PM MDT Sat May 29 2021
COC035-292040-
/O.EXP.KBOU.SV.W.0053.000000T0000Z-210529T2030Z/
Douglas CO-
230 PM MDT Sat May 29 2021
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN DOUGLAS COUNTY
HAS EXPIRED...
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning has been allowed to expire. Small hail up to
1/2 inch in diameter is possible with this storm over the next 15
minutes.
A Tornado Watch remains in effect until 900 PM MDT for east central
Colorado.
LAT...LON 3919 10487 3931 10487 3931 10466 3914 10467
TIME...MOT...LOC 2030Z 125DEG 22KT 3930 10488
$$
SCHLATTERThe office that day
Everything else NWS Denver/Boulder, CO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 29, 6:20 AM MDT | Dense Fog Advisory | BOU | Elbert, Lincoln, Washington, Weld | 100 min |
| May 29, 1:34 PM MDT | Special Weather Statement | BOU | Boulder | 26 min |
| May 29, 1:55 PM MDT | Severe Thunderstorm Warning | BOU | Elbert | 35 min |
| May 29, 2:29 PM MDT | Severe Thunderstorm Warning | BOU | Weld | 31 min |
| May 29, 2:59 PM MDT | Special Weather Statement | BOU | Weld | 31 min |
| May 29, 3:39 PM MDT | Areal Flood Advisory | BOU | Larimer | 83 min |
| May 29, 4:58 PM MDT | Severe Thunderstorm Warning | BOU | Lincoln | 32 min |
| May 29, 5:16 PM MDT | Severe Thunderstorm Warning | 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.