Alert archive / Wyoming / Tornado Warnings in 2020

Tornado Warning 1, NWS Cheyenne, WY

June 6, 2020Albany County, Carbon County, Wyoming

NWS Cheyenne, WY issued this tornado warning at Jun 6, 2020, 3:02 PM MDT for Albany County, Carbon County, Wyoming. It was in force for 28 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: Jun 6, 2020, 3:02 PM MDT (21:02 UTC)
Expired: Jun 6, 2020, 3:30 PM MDT
In force: 28 min
Issued by: NWS Cheyenne, WY
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.75 in

Counties Albany County, WY, Carbon County, WY

The radar

The Cheyenne radar (KCYS), 126 km from the middle of the area, began a volume at 21:03 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
Jun 6, 3:12 PM MDT	TSTM WND GST 77	1 Nnw Arlington, WY	MESONET STATION KARL 0.6 NW ARLINGTON (WYDOT).

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
Jun 6, 1:23 PM MDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Riverton, WY (KRIW), launched 12:00Z, 9.0 hours before the alert went out and 243 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: 2034 m above ground
0-6 km bulk shear: 20 kt
0-1 km storm-relative helicity: -7 m²/s²
0-3 km storm-relative helicity: 27 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

589 
WFUS55 KCYS 062102
TORCYS
WYC001-007-062130-
/O.NEW.KCYS.TO.W.0001.200606T2102Z-200606T2130Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Cheyenne WY
302 PM MDT Sat Jun 6 2020

The National Weather Service in Cheyenne has issued a

* Tornado Warning for...
  East central Carbon County in south central Wyoming...
  Central Albany County in southeastern Wyoming...

* Until 330 PM MDT.
    
* At 301 PM MDT, a severe thunderstorm capable of producing a tornado
  was located near Bow River Campground, or 40 miles northwest of
  Laramie, moving northeast at 70 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 dangerous storm will be near...
  Arlington around 305 PM MDT.
  Rock River around 320 PM MDT.

This includes Interstate 80 in Wyoming between mile markers 265 and
277.
 
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 4146 10630 4155 10642 4189 10608 4172 10584
TIME...MOT...LOC 2101Z 223DEG 59KT 4155 10630 

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

$$

Brothers

2 follow-up statements

658 
WWUS55 KCYS 062113
SVSCYS

Severe Weather Statement
National Weather Service Cheyenne WY
313 PM MDT Sat Jun 6 2020

WYC001-007-062130-
/O.CON.KCYS.TO.W.0001.000000T0000Z-200606T2130Z/
Carbon WY-Albany WY-
313 PM MDT Sat Jun 6 2020

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 330 PM MDT FOR EAST
CENTRAL CARBON AND CENTRAL ALBANY COUNTIES...
    
At 313 PM MDT, a severe thunderstorm capable of producing a tornado
was located near Arlington, or 38 miles northwest of Laramie, moving
northeast at 65 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 dangerous storm will be near...
  Rock River around 325 PM MDT.

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 4160 10617 4168 10629 4189 10608 4174 10587
TIME...MOT...LOC 2113Z 222DEG 56KT 4167 10616 

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

$$

Brothers

409 
WWUS55 KCYS 062127
SVSCYS

Severe Weather Statement
National Weather Service Cheyenne WY
327 PM MDT Sat Jun 6 2020

WYC001-007-062135-
/O.EXP.KCYS.TO.W.0001.000000T0000Z-200606T2130Z/
Carbon WY-Albany WY-
327 PM MDT Sat Jun 6 2020

...THE TORNADO WARNING FOR EAST CENTRAL CARBON AND CENTRAL ALBANY
COUNTIES WILL EXPIRE AT 330 PM MDT...
    
The tornado threat has diminished and the Tornado Warning has been 
cancelled. However, damaging winds remain likely and a Severe 
Thunderstorm Warning remains in effect for the area.  

A Severe Thunderstorm Watch remains in effect until 800 PM MDT for
south central and southeastern Wyoming.

Remember, a Severe Thunderstorm Warning still remains in effect for
Carbon and Albany counties. 

LAT...LON 4160 10617 4168 10629 4189 10608 4174 10587
TIME...MOT...LOC 2125Z 223DEG 59KT 4180 10600 

$$

Cox

The office that day

Everything else NWS Cheyenne, WY issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 5, 6:14 PM MDT	Special Weather Statement	CYS	Niobrara	31 min
Jun 5, 6:17 PM MDT	Severe Thunderstorm Warning	CYS	Niobrara	28 min
Jun 5, 6:44 PM MDT	Severe Thunderstorm Warning	CYS	Niobrara	31 min
Jun 5, 7:12 PM MDT	Severe Thunderstorm Warning	CYS	Niobrara	33 min
Jun 6, 12:13 AM MDT	Special Weather Statement	CYS	Albany, Carbon	62 min
Jun 6, 1:28 PM MDT	Severe Thunderstorm Warning	CYS	Carbon	62 min
Jun 6, 2:09 PM MDT	Severe Thunderstorm Warning	CYS	Carbon	66 min
Jun 6, 2:29 PM MDT	Severe Thunderstorm Warning	CYS	Carbon	31 min
Jun 6, 2:53 PM MDT	Severe Thunderstorm Warning	CYS	Albany, Carbon	67 min
Jun 6, 3:40 PM MDT	Severe Thunderstorm Warning	CYS	Albany, Converse, Platte	65 min
Jun 6, 4:08 PM MDT	Severe Thunderstorm Warning	CYS	Laramie	52 min
Jun 6, 4:23 PM MDT	Severe Thunderstorm Warning	CYS	Goshen, Laramie	37 min
Jun 6, 4:39 PM MDT	Severe Thunderstorm Warning	CYS	Converse, Goshen, Niobrara, Platte	51 min
Jun 6, 4:56 PM MDT	Severe Thunderstorm Warning	CYS	Goshen, Laramie	49 min
Jun 6, 5:14 PM MDT	Severe Thunderstorm Warning	CYS	Goshen, Niobrara	31 min
Jun 6, 5:32 PM MDT	Severe Thunderstorm Warning	CYS	Goshen	43 min
Jun 6, 5:42 PM MDT	Severe Thunderstorm Warning	CYS	Goshen, Niobrara	33 min

Nearby

Tornado Warnings in Wyoming, 2020 Every tornado warning in 2020 Tornadoes in 2020

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.