Alert archive / Colorado / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 44, NWS Denver/Boulder, CO

May 23, 2021Elbert County, Lincoln County, Colorado

NWS Denver/Boulder, CO issued this severe thunderstorm warning at May 23, 2021, 1:24 PM MDT for Elbert County, Lincoln County, Colorado. It was in force for 36 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 23, 2021, 1:24 PM MDT (19:24 UTC)
Expired: May 23, 2021, 2:00 PM MDT
In force: 36 min
Issued by: NWS Denver/Boulder, CO
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Elbert County, CO, Lincoln County, CO

The radar

The Denver radar (KFTG), 81 km from the middle of the area, began a volume at 19:25 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 23, 2:01 PM MDT	TORNADO	9 Se Cottonwood Valley, CO

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

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 12:00Z, 7.4 hours before the alert went out and 77 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1106 m above ground
0-6 km bulk shear: 59 kt
0-1 km storm-relative helicity: 73 m²/s²
0-3 km storm-relative helicity: 177 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

782 
WUUS55 KBOU 231924
SVRBOU
COC039-073-232000-
/O.NEW.KBOU.SV.W.0044.210523T1924Z-210523T2000Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Denver CO
124 PM MDT Sun May 23 2021

The National Weather Service in Denver Colorado has issued a

* Severe Thunderstorm Warning for...
  Northeastern Elbert County in east central Colorado...
  North central Lincoln County in east central Colorado...

* Until 200 PM MDT.

* At 123 PM MDT, a severe thunderstorm was located 4 miles east of
  Matheson, or 11 miles southwest of Limon, moving northeast at 50
  mph.

  HAZARD...60 mph wind gusts and quarter size hail.

  SOURCE...Radar indicated.

  IMPACT...Expect damage to roofs, siding, and trees. Hail damage to 
           vehicles is expected.

* Locations impacted include...
  Limon, Agate and Matheson. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Tornado Watch remains in effect until 800 PM MDT for northeastern
and east central Colorado.

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

&&

LAT...LON 3920 10407 3957 10390 3957 10371 3951 10342
      3920 10366 3910 10379
TIME...MOT...LOC 1923Z 210DEG 41KT 3919 10390 

HAIL...1.00IN
WIND...60MPH
 
$$

DANIELSON

1 follow-up statement

943 
WWUS55 KBOU 231940
SVSBOU

Severe Weather Statement
National Weather Service Denver CO
140 PM MDT Sun May 23 2021

COC039-073-232000-
/O.CON.KBOU.SV.W.0044.000000T0000Z-210523T2000Z/
Elbert CO-Lincoln CO-
140 PM MDT Sun May 23 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 200 PM MDT
FOR NORTHEASTERN ELBERT AND NORTH CENTRAL LINCOLN COUNTIES...

At 139 PM MDT, a severe thunderstorm was located 7 miles northwest of
Limon, moving northeast at 45 mph.

HAZARD...60 mph wind gusts and quarter size hail.

SOURCE...Radar indicated.

IMPACT...Expect damage to roofs, siding, and trees. Hail damage to 
         vehicles is expected.

Locations impacted include...
Limon.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Tornado Watch remains in effect until 800 PM MDT for northeastern
and east central Colorado.

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

&&

LAT...LON 3939 10391 3957 10388 3957 10371 3951 10342
      3920 10367 3919 10367 3924 10381
TIME...MOT...LOC 1939Z 210DEG 41KT 3935 10378 

HAIL...1.00IN
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 22, 6:06 PM MDT	Tornado Warning	BOU	Washington	24 min
May 22, 8:00 PM MDT	Special Weather Statement	BOU	Phillips	30 min
May 22, 8:29 PM MDT	Special Weather Statement	BOU	Phillips, Sedgwick	46 min
May 22, 9:37 PM MDT	Severe Thunderstorm Warning	BOU	Lincoln	38 min
May 23, 12:40 PM MDT	Tornado Warning	BOU	Elbert, Lincoln	19 min
May 23, 12:41 PM MDT	Special Weather Statement	BOU	Weld	49 min
May 23, 12:50 PM MDT	Severe Thunderstorm Warning	BOU	Elbert, Lincoln	40 min
May 23, 1:28 PM MDT	Special Weather Statement	BOU	Weld	32 min
May 23, 1:47 PM MDT	Tornado Warning	BOU	Arapahoe, Elbert, Lincoln, Washington	28 min
May 23, 2:13 PM MDT	Tornado Warning	BOU	Washington	32 min
May 23, 2:44 PM MDT	Severe Thunderstorm Warning	BOU	Morgan, Washington	31 min
May 23, 2:55 PM MDT	Tornado Warning	BOU	Washington	20 min
May 23, 3:11 PM MDT	Tornado Warning	BOU	Logan, Washington	34 min
May 23, 3:14 PM MDT	Severe Thunderstorm Warning	BOU	Arapahoe, Elbert, Lincoln, Washington	46 min
May 23, 3:42 PM MDT	Tornado Warning	BOU	Logan	33 min
May 23, 4:06 PM MDT	Areal Flood Advisory	BOU	Washington	3 hr
May 23, 4:10 PM MDT	Tornado Warning Tornado observedConsiderable damage threat	BOU	Logan	20 min
May 23, 4:27 PM MDT	Tornado Warning	BOU	Logan	23 min
May 23, 4:43 PM MDT	Tornado Warning	BOU	Washington	17 min
May 23, 4:58 PM MDT	Tornado Warning	BOU	Washington	17 min
May 23, 5:12 PM MDT	Areal Flood Advisory	BOU	Logan, Washington	104 min
May 23, 5:13 PM MDT	Severe Thunderstorm Warning	BOU	Logan, Phillips, Washington	32 min
May 23, 5:31 PM MDT	Tornado Warning	BOU	Washington	14 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.