Alert archive / Colorado / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 48, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this severe thunderstorm warning at May 23, 2021, 6:19 PM MDT for Phillips County, Sedgwick County, Colorado. It was in force for 41 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
- May 23, 2021, 6:19 PM MDT (00:19 UTC)
- Expired
- May 23, 2021, 7:00 PM MDT
- In force
- 41 min
- Issued by
- NWS Denver/Boulder, CO
- Area
- Storm-based polygon
- Tornado
- Possible
- Hail
- 0.88 in
- Wind
- 60.0 mph
Counties Phillips County, CO, Sedgwick County, CO
The radar
The Goodland radar (KGLD), 154 km from the middle of the area, began a volume at 00:22 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 watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| May 23, 12:06 PM MDT | Tornado Watch | SPC | 8 hr |
The nearest sounding before it
Denver, CO (KDNR), launched 00:00Z, 0.3 hours before the alert went out and 116 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
- 3282 m above ground
- 0-6 km bulk shear
- 60 kt
- 0-1 km storm-relative helicity
- 34 m²/s²
- 0-3 km storm-relative helicity
- 132 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
107 WUUS55 KBOU 240019 SVRBOU COC095-115-240100- /O.NEW.KBOU.SV.W.0048.210524T0019Z-210524T0100Z/ BULLETIN - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Warning National Weather Service Denver CO 619 PM MDT Sun May 23 2021 The National Weather Service in Denver Colorado has issued a * Severe Thunderstorm Warning for... Phillips County in northeastern Colorado... Sedgwick County in northeastern Colorado... * Until 700 PM MDT. * At 619 PM MDT, a severe thunderstorm was located 4 miles southeast of Paoli, or 4 miles west of Holyoke, moving northeast at 55 mph. HAZARD...60 mph wind gusts and nickel size hail. SOURCE...Radar indicated. IMPACT...Expect damage to roofs, siding, and trees. * Locations impacted include... Holyoke, Julesburg, Ovid, Paoli, Amherst, Highland Center, Pleasant Valley, Fairfield and Sixteen-Mile Corner. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Tornado Watch remains in effect until 800 PM MDT for northeastern Colorado. For your protection move to an interior room on the lowest floor of a building. && LAT...LON 4044 10263 4100 10239 4100 10205 4044 10205 TIME...MOT...LOC 0019Z 206DEG 46KT 4059 10240 TORNADO...POSSIBLE HAIL...0.88IN WIND...60MPH $$ DANIELSON
1 follow-up statement
806 WWUS55 KBOU 240039 SVSBOU Severe Weather Statement National Weather Service Denver CO 639 PM MDT Sun May 23 2021 COC095-115-240100- /O.CON.KBOU.SV.W.0048.000000T0000Z-210524T0100Z/ Phillips CO-Sedgwick CO- 639 PM MDT Sun May 23 2021 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 700 PM MDT FOR EASTERN PHILLIPS AND EASTERN SEDGWICK COUNTIES... At 639 PM MDT, a severe thunderstorm was located 4 miles north of Sixteen-Mile Corner, or 11 miles south of Julesburg, moving northeast at 55 mph. HAZARD...60 mph wind gusts and nickel size hail. SOURCE...Radar indicated. IMPACT...Expect damage to roofs, siding, and trees. Locations impacted include... Holyoke, Amherst, Pleasant Valley and Sixteen-Mile Corner. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Tornado Watch remains in effect until 800 PM MDT for northeastern Colorado. For your protection move to an interior room on the lowest floor of a building. && LAT...LON 4044 10243 4100 10223 4100 10205 4044 10205 TIME...MOT...LOC 0039Z 206DEG 46KT 4082 10225 TORNADO...POSSIBLE HAIL...0.88IN WIND...60MPH $$ DANIELSON
The office that day
Everything else NWS Denver/Boulder, CO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 24, 6:23 AM MDT | Dense Fog Advisory | BOU | Elbert, Lincoln, Logan, Morgan, Phillips, Sedgwick and 2 more | 3 hr |
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.