Alert archive / Colorado / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 89, NWS Denver/Boulder, CO

June 24, 2021Lincoln County, Colorado

NWS Denver/Boulder, CO issued this severe thunderstorm warning at Jun 24, 2021, 6:08 PM MDT for Lincoln County, Colorado. It was in force for 19 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: Jun 24, 2021, 6:08 PM MDT (00:08 UTC)
Expired: Jun 24, 2021, 6:27 PM MDT
In force: 19 min
Issued by: NWS Denver/Boulder, CO
Area: Storm-based polygon
Hail: 1.5 in
Wind: 60.0 mph

County Lincoln County, CO

The radar

The Pueblo radar (KPUX), 90 km from the middle of the area, began a volume at 00:10 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
Jun 24, 3:56 PM MDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Denver, CO (KDNR), launched 00:00Z, 0.1 hours before the alert went out and 109 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 10 J/kg
Mixed-layer CIN: -366 J/kg
Mixed-layer LCL: 2307 m above ground
0-6 km bulk shear: 34 kt
0-1 km storm-relative helicity: 103 m²/s²
0-3 km storm-relative helicity: 130 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The text

As transmitted.

414 
WUUS55 KBOU 250008
SVRBOU
COC073-250045-
/O.NEW.KBOU.SV.W.0089.210625T0008Z-210625T0045Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Denver CO
608 PM MDT Thu Jun 24 2021

The National Weather Service in Denver Colorado has issued a

* Severe Thunderstorm Warning for...
  East central Lincoln County in east central Colorado...

* Until 645 PM MDT.

* At 608 PM MDT, a severe thunderstorm was located 5 miles southwest
  of Boyero, or 32 miles southwest of Flagler, moving east at 20 mph.

  HAZARD...Ping pong ball size hail and 60 mph wind gusts.

  SOURCE...Radar indicated.

  IMPACT...Expect damage to roofs, siding, and trees. People and 
           animals outdoors will be injured. Expect hail damage to 
           roofs, siding, windows, and vehicles.

* Locations impacted include...
  Boyero.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 3879 10343 3896 10345 3903 10316 3900 10316
      3876 10317
TIME...MOT...LOC 0008Z 255DEG 17KT 3887 10334 

HAIL...1.50IN
WIND...60MPH
 
$$

ENTREKIN

1 follow-up statement

037 
WWUS55 KBOU 250027
SVSBOU

Severe Weather Statement
National Weather Service Denver CO
627 PM MDT Thu Jun 24 2021

COC073-250037-
/O.CAN.KBOU.SV.W.0089.000000T0000Z-210625T0045Z/
Lincoln CO-
627 PM MDT Thu Jun 24 2021

...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL LINCOLN COUNTY IS
CANCELLED...
        
The storm which prompted the warning has moved out of the area.
Therefore, the warning has been cancelled.  However heavy rain is
still possible with this thunderstorm.

A Severe Thunderstorm Watch remains in effect until 1000 PM MDT for
east central Colorado.

LAT...LON 3879 10343 3896 10345 3903 10316 3900 10316
      3876 10317
TIME...MOT...LOC 0024Z 255DEG 17KT 3889 10323 

$$

ENTREKIN

The office that day

Everything else NWS Denver/Boulder, CO issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 24, 6:19 PM MDT	Areal Flood Advisory	BOU	Larimer	86 min
Jun 24, 6:33 PM MDT	Special Weather Statement	BOU	Lincoln	42 min
Jun 24, 7:56 PM MDT	Special Weather Statement	BOU	Lincoln	49 min
Jun 25, 12:30 PM MDT	Special Weather Statement	BOU	Weld	45 min
Jun 25, 1:10 PM MDT	Special Weather Statement	BOU	Morgan	35 min
Jun 25, 1:25 PM MDT	Areal Flood Advisory	BOU	Larimer	70 min
Jun 25, 1:32 PM MDT	Areal Flood Advisory	BOU	Boulder	88 min
Jun 25, 1:52 PM MDT	Special Weather Statement	BOU	Logan	23 min
Jun 25, 1:59 PM MDT	Severe Thunderstorm Warning	BOU	Boulder, Jefferson	46 min
Jun 25, 2:04 PM MDT	Flash Flood Warning	BOU	Larimer	116 min
Jun 25, 2:16 PM MDT	Special Weather Statement	BOU	Douglas	44 min
Jun 25, 2:26 PM MDT	Special Weather Statement	BOU	Logan	49 min
Jun 25, 2:35 PM MDT	Special Weather Statement	BOU	Elbert	40 min
Jun 25, 2:50 PM MDT	Special Weather Statement	BOU	Broomfield	40 min
Jun 25, 2:57 PM MDT	Special Weather Statement	BOU	Weld	48 min
Jun 25, 3:10 PM MDT	Special Weather Statement	BOU	Phillips	50 min
Jun 25, 3:24 PM MDT	Special Weather Statement	BOU	Lincoln	51 min
Jun 25, 4:12 PM MDT	Areal Flood Advisory	BOU	Arapahoe	93 min
Jun 25, 4:42 PM MDT	Areal Flood Advisory	BOU	Arapahoe, Douglas	93 min

Nearby

Severe Thunderstorm Warnings in Colorado, 2021 Every 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.