Alert archive / Colorado / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 42, NWS Denver/Boulder, CO

May 22, 2021Lincoln County, Colorado

NWS Denver/Boulder, CO issued this severe thunderstorm warning at May 22, 2021, 9:37 PM MDT for Lincoln County, Colorado. It was in force for 38 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 22, 2021, 9:37 PM MDT (03:37 UTC)
Expired
May 22, 2021, 10:15 PM MDT
In force
38 min
Issued by
NWS Denver/Boulder, CO
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

County Lincoln County, CO

The radar

The Pueblo radar (KPUX), 113 km from the middle of the area, began a volume at 03:41 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 nearest sounding before it

Denver, CO (KDNR), launched 00:00Z, 3.6 hours before the alert went out and 74 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-pSkew-T log-p diagram, Denver, CO at 00:00Z on 2021-05-23Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 34 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Denver, CO at 00:00Z on 2021-05-23The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 279 square meters per square second.1939587897Sfc1 km3 km6 km9 kmRMLM
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
34 J/kg
Mixed-layer CIN
-91 J/kg
Mixed-layer LCL
1134 m above ground
0-6 km bulk shear
58 kt
0-1 km storm-relative helicity
279 m²/s²
0-3 km storm-relative helicity
385 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.5

Open this sounding in Storm Lab

The text

As transmitted.

821 
WUUS55 KBOU 230337
SVRBOU
COC073-230415-
/O.NEW.KBOU.SV.W.0042.210523T0337Z-210523T0415Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Denver CO
937 PM MDT Sat May 22 2021

The National Weather Service in Denver Colorado has issued a

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

* Until 1015 PM MDT.

* At 935 PM MDT, a severe thunderstorm was located 5 miles north of
  Boyero, or 22 miles southwest of Flagler, moving north 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...
  Arriba and Boyero. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3943 10356 3948 10318 3913 10315 3913 10316
      3893 10316 3891 10330
TIME...MOT...LOC 0335Z 168DEG 37KT 3901 10328 

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

KRIEDERMAN
2 follow-up statements
967 
WWUS55 KBOU 230359
SVSBOU

Severe Weather Statement
National Weather Service Denver CO
959 PM MDT Sat May 22 2021

COC073-230415-
/O.CON.KBOU.SV.W.0042.000000T0000Z-210523T0415Z/
Lincoln CO-
959 PM MDT Sat May 22 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1015 PM MDT
FOR NORTHEASTERN LINCOLN COUNTY...

At 959 PM MDT, a severe thunderstorm was located 4 miles southwest of
Arriba, or 15 miles west of Flagler, moving north 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...
Arriba.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3943 10356 3948 10318 3913 10315 3913 10316
      3910 10316 3916 10332
TIME...MOT...LOC 0359Z 168DEG 37KT 3925 10335 

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

KRIEDERMAN
067 
WWUS55 KBOU 230410
SVSBOU

Severe Weather Statement
National Weather Service Denver CO
1010 PM MDT Sat May 22 2021

COC073-230420-
/O.EXP.KBOU.SV.W.0042.000000T0000Z-210523T0415Z/
Lincoln CO-
1010 PM MDT Sat May 22 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN LINCOLN COUNTY
WILL EXPIRE AT 1015 PM MDT...
                
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 will be allowed to expire.  However gusty
winds up to 45 mph are still possible with this thunderstorm.

LAT...LON 3943 10356 3948 10318 3913 10315 3913 10316
      3910 10316 3916 10332
TIME...MOT...LOC 0410Z 168DEG 37KT 3935 10338 

$$

KRIEDERMAN

The office that day

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

IssuedProductOfficeCountiesLasted
May 22, 6:06 PM MDTTornado WarningBOUWashington24 min
May 22, 8:00 PM MDTSpecial Weather StatementBOUPhillips30 min
May 22, 8:29 PM MDTSpecial Weather StatementBOUPhillips, Sedgwick46 min
May 23, 12:40 PM MDTTornado WarningBOUElbert, Lincoln19 min
May 23, 12:41 PM MDTSpecial Weather StatementBOUWeld49 min
May 23, 12:50 PM MDTSevere Thunderstorm WarningBOUElbert, Lincoln40 min
May 23, 1:24 PM MDTSevere Thunderstorm WarningBOUElbert, Lincoln36 min
May 23, 1:28 PM MDTSpecial Weather StatementBOUWeld32 min
May 23, 1:47 PM MDTTornado WarningBOUArapahoe, Elbert, Lincoln, Washington28 min
May 23, 2:13 PM MDTTornado WarningBOUWashington32 min
May 23, 2:44 PM MDTSevere Thunderstorm WarningBOUMorgan, Washington31 min
May 23, 2:55 PM MDTTornado WarningBOUWashington20 min
May 23, 3:11 PM MDTTornado WarningBOULogan, Washington34 min
May 23, 3:14 PM MDTSevere Thunderstorm WarningBOUArapahoe, Elbert, Lincoln, Washington46 min
May 23, 3:42 PM MDTTornado WarningBOULogan33 min
May 23, 4:06 PM MDTAreal Flood AdvisoryBOUWashington3 hr
May 23, 4:10 PM MDTTornado Warning Tornado observedConsiderable damage threatBOULogan20 min
May 23, 4:27 PM MDTTornado WarningBOULogan23 min
May 23, 4:43 PM MDTTornado WarningBOUWashington17 min
May 23, 4:58 PM MDTTornado WarningBOUWashington17 min
May 23, 5:12 PM MDTAreal Flood AdvisoryBOULogan, Washington104 min
May 23, 5:13 PM MDTSevere Thunderstorm WarningBOULogan, Phillips, Washington32 min
May 23, 5:31 PM MDTTornado WarningBOUWashington14 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.