Alert archive / Colorado / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 27, NWS Denver/Boulder, CO

May 16, 2021Lincoln County, Colorado

NWS Denver/Boulder, CO issued this severe thunderstorm warning at May 16, 2021, 4:13 PM MDT for Lincoln County, Colorado. It was in force for 32 min. 3 reports 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 16, 2021, 4:13 PM MDT (22:13 UTC)
Expired: May 16, 2021, 4:45 PM MDT
In force: 32 min
Issued by: NWS Denver/Boulder, CO
Area: Storm-based polygon
Hail: 1.25 in
Wind: 50.0 mph

County Lincoln County, CO

The radar

The Pueblo radar (KPUX), 58 km from the middle of the area, began a volume at 22:14 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 16, 4:31 PM MDT	HAIL 1.75	5 W Karval, CO	DELAYED REPORT. COCORAHS STATION CO-LN-34 KARVAL 4.8 W. OBSERVER NOTED DENTED CARS AND DAMAGED SHINGLES. TIME ESTIMATED BY RADAR.
May 16, 4:36 PM MDT	HAIL 1.25	4 W Karval, CO	HAIL COVERING THE GROUND.
May 16, 4:40 PM MDT	HAIL 1.25	5 Wsw Karval, CO	MEASURED AFTER HAIL STOPPED. TIME ESTIMATED BY RADAR.

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, 10.2 hours before the alert went out and 131 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: 215 J/kg
Mixed-layer CIN: -294 J/kg
Mixed-layer LCL: 861 m above ground
0-6 km bulk shear: 22 kt
0-1 km storm-relative helicity: 35 m²/s²
0-3 km storm-relative helicity: -44 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

859 
WUUS55 KBOU 162213
SVRBOU
COC073-162245-
/O.NEW.KBOU.SV.W.0027.210516T2213Z-210516T2245Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Denver CO
413 PM MDT Sun May 16 2021

The National Weather Service in Denver Colorado has issued a

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

* Until 445 PM MDT.

* At 413 PM MDT, a severe thunderstorm was located near Karval, or 35
  miles south of Limon, moving northeast at 10 mph.

  HAZARD...Half dollar size hail.

  SOURCE...Radar indicated.

  IMPACT...Damage to vehicles is expected. Hail may accumulate on 
           roadways causing hazardous travel.

* Locations impacted include...
  Karval.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3861 10366 3877 10375 3890 10351 3874 10345
TIME...MOT...LOC 2213Z 238DEG 8KT 3876 10360 

HAIL...1.25IN
WIND...<50MPH
 
$$

RPK

1 follow-up statement

992 
WWUS55 KBOU 162235
SVSBOU

Severe Weather Statement
National Weather Service Denver CO
435 PM MDT Sun May 16 2021

COC073-162245-
/O.CON.KBOU.SV.W.0027.000000T0000Z-210516T2245Z/
Lincoln CO-
435 PM MDT Sun May 16 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 445 PM MDT
FOR SOUTH CENTRAL LINCOLN COUNTY...

At 435 PM MDT, a severe thunderstorm was located 4 miles east of
Forder, or 40 miles south of Limon, and is nearly stationary.

HAZARD...Half dollar size hail.

SOURCE...Radar indicated.

IMPACT...Damage to vehicles is expected. Hail may accumulate on 
         roadways causing hazardous travel.

Locations impacted include...
Karval.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Remain alert for a possible tornado! Tornadoes can develop quickly
from severe thunderstorms. If you spot a tornado go at once into the
basement or small central room in a sturdy structure.

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

&&

LAT...LON 3861 10366 3877 10375 3890 10351 3874 10345
TIME...MOT...LOC 2235Z 346DEG 2KT 3868 10362 

TORNADO...POSSIBLE
HAIL...1.25IN
WIND...<50MPH
 
$$

RPK

The office that day

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

Issued	Product	Office	Counties	Lasted
May 15, 6:00 PM MDT	Special Weather Statement	BOU	Douglas	30 min
May 16, 1:33 PM MDT	Areal Flood Advisory	BOU	Jackson	87 min
May 16, 3:58 PM MDT	Special Weather Statement	BOU	Lincoln	32 min
May 16, 4:27 PM MDT	Severe Thunderstorm Warning	BOU	Lincoln	33 min
May 16, 4:43 PM MDT	Severe Thunderstorm Warning	BOU	Lincoln	32 min
May 16, 4:51 PM MDT	Tornado Warning	BOU	Lincoln	24 min
May 16, 4:54 PM MDT	Severe Thunderstorm Warning	BOU	Lincoln	36 min
May 16, 5:22 PM MDT	Areal Flood Advisory	BOU	Lincoln	113 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.