Alert archive / Colorado / Tornado Warnings in 2021

Tornado Warning 40, NWS Goodland, KS

August 19, 2021Yuma County, Colorado

NWS Goodland, KS issued this tornado warning at Aug 19, 2021, 7:36 PM MDT for Yuma County, Colorado. It was in force for 24 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
Aug 19, 2021, 7:36 PM MDT (01:36 UTC)
Expired
Aug 19, 2021, 8:00 PM MDT
In force
24 min
Issued by
NWS Goodland, KS
Area
Storm-based polygon
Tornado
Radar indicated
Hail
0.75 in

County Yuma County, CO

The radar

The Goodland radar (KGLD), 116 km from the middle of the area, began a volume at 01:37 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.

IssuedProductOfficeLasted
Aug 19, 5:25 PM MDTTornado WatchSPC6 hr

The nearest sounding before it

Denver, CO (KDNR), launched 00:00Z, 1.6 hours before the alert went out and 85 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 2021-08-20Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 56 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 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 2021-08-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 52 square meters per square second.19395878Sfc1 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
56 J/kg
Mixed-layer CIN
-210 J/kg
Mixed-layer LCL
1497 m above ground
0-6 km bulk shear
52 kt
0-1 km storm-relative helicity
52 m²/s²
0-3 km storm-relative helicity
222 m²/s²
Significant tornado parameter
0.0
Supercell composite
-0.0

Open this sounding in Storm Lab

The text

As transmitted.

135 
WFUS53 KGLD 200136
TORGLD
COC125-200200-
/O.NEW.KGLD.TO.W.0040.210820T0136Z-210820T0200Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Goodland KS
736 PM MDT Thu Aug 19 2021

The National Weather Service in Goodland has issued a

* Tornado Warning for...
  North central Yuma County in northeastern Colorado...

* Until 800 PM MDT.
    
* At 735 PM MDT, a severe thunderstorm capable of producing a tornado
  was located 11 miles northeast of Eckley, or 15 miles northwest of
  Wray, moving northeast at 25 mph.

  HAZARD...Tornado.

  SOURCE...Radar indicated rotation.

  IMPACT...Flying debris will be dangerous to those caught without 
           shelter. Mobile homes will be damaged or destroyed. 
           Damage to roofs, windows, and vehicles will occur.  Tree 
           damage is likely.

* This tornadic thunderstorm will remain over mainly rural areas of
  north central Yuma County.

This includes Highway 385 between mile markers 261 and 263.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.

This cluster of thunderstorms is capable of producing tornadoes and
widespread significant wind damage. Do not wait to see or hear the
tornado. For your protection move to an interior room on the lowest
floor of a building.

&&

LAT...LON 4020 10243 4025 10249 4039 10232 4032 10223
TIME...MOT...LOC 0135Z 226DEG 24KT 4027 10239 

TORNADO...RADAR INDICATED
MAX HAIL SIZE...<.75 IN

$$

KMK/JRM
2 follow-up statements
830 
WWUS53 KGLD 200144
SVSGLD

Severe Weather Statement
National Weather Service Goodland KS
744 PM MDT Thu Aug 19 2021

COC125-200200-
/O.CON.KGLD.TO.W.0040.000000T0000Z-210820T0200Z/
Yuma CO-
744 PM MDT Thu Aug 19 2021

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 800 PM MDT FOR NORTH
CENTRAL YUMA COUNTY...
    
At 744 PM MDT, a severe thunderstorm capable of producing a tornado
was located 16 miles northeast of Eckley, or 17 miles north of Wray,
moving northeast at 30 mph.

HAZARD...Tornado.

SOURCE...Radar indicated rotation.

IMPACT...Flying debris will be dangerous to those caught without 
         shelter. Mobile homes will be damaged or destroyed. Damage 
         to roofs, windows, and vehicles will occur.  Tree damage is 
         likely.

This tornadic thunderstorm will remain over mainly rural areas of
north central Yuma County.

This includes Highway 385 between mile markers 261 and 263.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.

This cluster of thunderstorms is capable of producing tornadoes and
widespread significant wind damage. Do not wait to see or hear the
tornado. For your protection move to an interior room on the lowest
floor of a building.

&&

LAT...LON 4022 10240 4026 10243 4039 10232 4032 10223
TIME...MOT...LOC 0144Z 226DEG 24KT 4031 10233 

TORNADO...RADAR INDICATED
MAX HAIL SIZE...<.75 IN

$$

KMK/JRM
684 
WWUS53 KGLD 200155
SVSGLD

Severe Weather Statement
National Weather Service Goodland KS
755 PM MDT Thu Aug 19 2021

COC125-200204-
/O.EXP.KGLD.TO.W.0040.000000T0000Z-210820T0200Z/
Yuma CO-
755 PM MDT Thu Aug 19 2021

...THE TORNADO WARNING FOR NORTH CENTRAL YUMA COUNTY WILL EXPIRE AT
800 PM MDT...
    
The tornado threat has diminished and the Tornado Warning has been
cancelled. However, large hail and damaging winds remain likely and 
a Severe Thunderstorm Warning remains in effect for the area. 

A Tornado Watch remains in effect until 1100 PM MDT for northeastern
Colorado.

LAT...LON 4022 10240 4026 10243 4039 10232 4032 10223
TIME...MOT...LOC 0154Z 226DEG 24KT 4035 10228 

$$

KMK/JRM

The office that day

Everything else NWS Goodland, KS issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Aug 19, 6:28 PM MDTSpecial Weather StatementGLDPhillips47 min
Aug 19, 6:31 PM MDTSpecial Weather StatementGLDYuma44 min
Aug 19, 6:46 PM MDTSevere Thunderstorm WarningGLDYuma44 min
Aug 19, 7:17 PM MDTSpecial Weather StatementGLDPhillips28 min
Aug 19, 7:31 PM MDTSevere Thunderstorm WarningGLDYuma59 min
Aug 19, 7:50 PM MDTFlash Flood WarningGLDYuma5 hr
Aug 19, 8:08 PM MDTTornado WarningGLDYuma22 min
Aug 19, 8:44 PM MDTSevere Thunderstorm WarningGLDYuma31 min
Aug 19, 9:14 PM MDTSevere Thunderstorm WarningGLDYuma46 min
Aug 19, 9:49 PM MDTSpecial Weather StatementGLDYuma26 min
Aug 19, 10:48 PM MDTSpecial Weather StatementGLDPhillips42 min
Aug 19, 10:51 PM MDTSpecial Weather StatementGLDYuma39 min
Aug 20, 12:31 AM MDTAreal Flood WarningGLDYuma6 hr
Aug 20, 5:40 AM MDTSpecial Weather StatementGLDPhillips35 min

Nearby

Tornado Warnings in Colorado, 2021Every tornado warning in 2021Tornadoes 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.