Alert archive / Colorado / Tornado Warnings in 2021

Tornado Warning 9, NWS Goodland, KS

May 21, 2021Yuma County, Colorado

NWS Goodland, KS issued this tornado warning at May 21, 2021, 9:57 PM MDT for Yuma County, Colorado. It was in force for 33 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 21, 2021, 9:57 PM MDT (03:57 UTC)
Expired: May 21, 2021, 10:30 PM MDT
In force: 33 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), 60 km from the middle of the area, began a volume at 03:55 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
May 21, 4:17 PM MDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Denver, CO (KDNR), launched 00:00Z, 4.0 hours before the alert went out and 90 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: 3010 m above ground
0-6 km bulk shear: 52 kt
0-1 km storm-relative helicity: 17 m²/s²
0-3 km storm-relative helicity: 163 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

437 
WFUS53 KGLD 220357
TORGLD
COC125-220430-
/O.NEW.KGLD.TO.W.0009.210522T0357Z-210522T0430Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Goodland KS
957 PM MDT Fri May 21 2021

The National Weather Service in Goodland has issued a

* Tornado Warning for...
  Southeastern Yuma County in northeastern Colorado...

* Until 1030 PM MDT.

* At 956 PM MDT, severe thunderstorms capable of producing both
  tornadoes and extensive straight line wind damage were located near
  Bonny Reservoir, moving northeast at 55 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
  southeastern Yuma County, including the following locations...
  Hale, Idalia and Beecher Island.

This includes Highway 385 between mile markers 207 and 210, and
between mile markers 212 and 225.
 
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.

Heavy rainfall may hide this tornado. Do not wait to see or hear the
tornado. TAKE COVER NOW!

Tornadoes are extremely difficult to see and confirm at night. Do not
wait to see or hear the tornado. TAKE COVER NOW!

&&

LAT...LON 3996 10205 3957 10205 3957 10234 3963 10242
      3985 10224
TIME...MOT...LOC 0356Z 220DEG 49KT 3962 10224 

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

$$

Lundquist

4 follow-up statements

839 
WWUS53 KGLD 220401
SVSGLD

Severe Weather Statement
National Weather Service Goodland KS
1001 PM MDT Fri May 21 2021

COC125-220430-
/O.CON.KGLD.TO.W.0009.000000T0000Z-210522T0430Z/
Yuma CO-
1001 PM MDT Fri May 21 2021

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 1030 PM MDT FOR
SOUTHEASTERN YUMA COUNTY...

At 1001 PM MDT, a severe squall line capable of producing both
tornadoes and extensive straight line wind damage was located 5 miles
northwest of Bonny Reservoir, moving northeast at 55 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.

Locations impacted include...
Bonny Reservoir, Hale, Beecher Island and Idalia. 

This includes Highway 385 near mile marker 210, and between mile
markers 212 and 225.
 
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.

Heavy rainfall may hide this tornado. Do not wait to see or hear the
tornado. TAKE COVER NOW!

Tornadoes are extremely difficult to see and confirm at night. Do not
wait to see or hear the tornado. TAKE COVER NOW!

&&

LAT...LON 3996 10205 3957 10205 3957 10215 3966 10239
      3985 10224
TIME...MOT...LOC 0401Z 217DEG 48KT 3968 10222 

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

$$

Lundquist

320 
WWUS53 KGLD 220409
SVSGLD

Severe Weather Statement
National Weather Service Goodland KS
1009 PM MDT Fri May 21 2021

COC125-220430-
/O.CON.KGLD.TO.W.0009.000000T0000Z-210522T0430Z/
Yuma CO-
1009 PM MDT Fri May 21 2021

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 1030 PM MDT FOR
SOUTHEASTERN YUMA COUNTY...

At 1009 PM MDT, a severe squall line capable of producing both
tornadoes and extensive straight line wind damage was located 9 miles
north of Bonny Reservoir, moving northeast at 55 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.

Locations impacted include...
Beecher Island.

This includes Highway 385 between mile markers 217 and 225.
 
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.

Heavy rainfall may hide this tornado. Do not wait to see or hear the
tornado. TAKE COVER NOW!

Tornadoes are extremely difficult to see and confirm at night. Do not
wait to see or hear the tornado. TAKE COVER NOW!

&&

LAT...LON 3996 10205 3963 10205 3964 10214 3975 10232
      3985 10224
TIME...MOT...LOC 0409Z 218DEG 47KT 3976 10216 

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

$$

Lundquist

035 
WWUS53 KGLD 220415
SVSGLD

Severe Weather Statement
National Weather Service Goodland KS
1015 PM MDT Fri May 21 2021

COC125-220430-
/O.CON.KGLD.TO.W.0009.000000T0000Z-210522T0430Z/
Yuma CO-
1015 PM MDT Fri May 21 2021

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 1030 PM MDT FOR EAST
CENTRAL YUMA COUNTY...

At 1014 PM MDT, a severe squall line capable of producing both
tornadoes and extensive straight line wind damage was located 14
miles north of Bonny Reservoir, moving northeast at 55 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.

Locations impacted include...
Beecher Island.

This includes Highway 385 between mile markers 223 and 225.
 
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.

Heavy rainfall may hide this tornado. Do not wait to see or hear the
tornado. TAKE COVER NOW!

Tornadoes are extremely difficult to see and confirm at night. Do not
wait to see or hear the tornado. TAKE COVER NOW!

&&

LAT...LON 3996 10205 3969 10205 3980 10227 3985 10224
TIME...MOT...LOC 0414Z 217DEG 48KT 3982 10213 

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

$$

Lundquist

672 
WWUS53 KGLD 220425
SVSGLD

Severe Weather Statement
National Weather Service Goodland KS
1025 PM MDT Fri May 21 2021

COC125-220434-
/O.EXP.KGLD.TO.W.0009.000000T0000Z-210522T0430Z/
Yuma CO-
1025 PM MDT Fri May 21 2021

...THE TORNADO WARNING FOR EAST CENTRAL YUMA COUNTY WILL EXPIRE AT
1030 PM MDT...
        
The storm which prompted the warning no longer poses a tornado 
threat, and will exit the warned area soon. Therefore, the warning 
will be allowed to expire. However gusty winds are still possible 
with this thunderstorm.

LAT...LON 3996 10205 3969 10205 3980 10227 3985 10224
TIME...MOT...LOC 0424Z 220DEG 49KT 3989 10205 

$$

Lundquist

The office that day

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

Issued	Product	Office	Counties	Lasted
May 21, 7:08 PM MDT	Special Weather Statement	GLD	Cheyenne	22 min
May 21, 9:17 PM MDT	Special Weather Statement	GLD	Cheyenne	28 min

Nearby

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