Alert archive / Wyoming / Tornado Warnings in 2018

Tornado Warning 16, NWS Cheyenne, WY

June 19, 2018Albany County, Laramie County, Platte County, Wyoming

NWS Cheyenne, WY issued this tornado warning at Jun 19, 2018, 2:01 PM MDT for Albany County, Laramie County, Platte County, Wyoming. It was in force for 44 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 19, 2018, 2:01 PM MDT (20:01 UTC)
Expired: Jun 19, 2018, 2:45 PM MDT
In force: 44 min
Issued by: NWS Cheyenne, WY
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 1.25 in

Counties Albany County, WY, Laramie County, WY, Platte County, WY

The radar

The Cheyenne radar (KCYS), 60 km from the middle of the area, began a volume at 20:03 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 19, 2:37 PM MDT	TORNADO	11 Nnw Whitaker, WY	ROOF WAS REMOVED FROM AN ABANDONED HOME. CATTLE FENCING WAS ALSO DOWN.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Denver, CO (KDEN), launched 12:00Z, 8.0 hours before the alert went out and 254 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: 30 J/kg
Mixed-layer CIN: -220 J/kg
Mixed-layer LCL: 836 m above ground
0-6 km bulk shear: 53 kt
0-1 km storm-relative helicity: 70 m²/s²
0-3 km storm-relative helicity: 73 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The text

As transmitted.

703 
WFUS55 KCYS 192001
TORCYS
WYC001-021-031-192045-
/O.NEW.KCYS.TO.W.0016.180619T2001Z-180619T2045Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Cheyenne WY
201 PM MDT TUE JUN 19 2018

The National Weather Service in Cheyenne has issued a

* Tornado Warning for...
  East central Albany County in southeastern Wyoming...
  Northwestern Laramie County in southeastern Wyoming...
  Southwestern Platte County in southeastern Wyoming...

* Until 245 PM MDT.
    
* At 200 PM MDT, a severe thunderstorm capable of producing a tornado
  was located 7 miles northwest of Iron Mountain, or 24 miles
  northeast of Laramie, moving east at 35 mph.

  HAZARD...Tornado and half dollar size hail.

  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...
  Iron Mountain around 210 PM MDT.

This includes Interstate 25 in Wyoming between mile markers 36 and 
43. This tornado warning does not include the city of Cheyenne. 
 
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.

&&

LAT...LON 4151 10543 4175 10544 4172 10486 4149 10487
TIME...MOT...LOC 2000Z 271DEG 30KT 4160 10533 

TORNADO...RADAR INDICATED
HAIL...1.25IN

$$

Cox

2 follow-up statements

398 
WWUS55 KCYS 192016
SVSCYS

Severe Weather Statement
National Weather Service Cheyenne WY
216 PM MDT TUE JUN 19 2018

WYC001-192025-
/O.CAN.KCYS.TO.W.0016.000000T0000Z-180619T2045Z/
Albany WY-
216 PM MDT TUE JUN 19 2018

...THE TORNADO WARNING FOR EAST CENTRAL ALBANY COUNTY IS CANCELLED...
    
The tornadic thunderstorm which prompted the warning has moved out 
of the warned area. Therefore, the warning has been cancelled.

LAT...LON 4150 10527 4174 10527 4172 10486 4149 10487
TIME...MOT...LOC 2015Z 271DEG 30KT 4160 10515 

$$

WYC021-031-192045-
/O.CON.KCYS.TO.W.0016.000000T0000Z-180619T2045Z/
Laramie WY-Platte WY-
216 PM MDT TUE JUN 19 2018

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 245 PM MDT FOR
NORTHWESTERN LARAMIE AND SOUTHWESTERN PLATTE COUNTIES...
    
At 215 PM MDT, a severe thunderstorm capable of producing a tornado
was located near Iron Mountain, or 29 miles northeast of Laramie,
moving east at 35 mph.

HAZARD...Tornado and half dollar size hail.

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
northwestern Laramie and southwestern Platte Counties.

This includes Interstate 25 in Wyoming between mile markers 36 and
43.
 
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.

&&

LAT...LON 4150 10527 4174 10527 4172 10486 4149 10487
TIME...MOT...LOC 2015Z 271DEG 30KT 4160 10515 

TORNADO...RADAR INDICATED
HAIL...1.25IN

$$

Cox

488 
WWUS55 KCYS 192034
SVSCYS

Severe Weather Statement
National Weather Service Cheyenne WY
234 PM MDT TUE JUN 19 2018

WYC021-031-192045-
/O.CON.KCYS.TO.W.0016.000000T0000Z-180619T2045Z/
Laramie WY-Platte WY-
234 PM MDT TUE JUN 19 2018

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 245 PM MDT FOR
NORTHWESTERN LARAMIE AND SOUTH CENTRAL PLATTE COUNTIES...
    
At 234 PM MDT, a severe thunderstorm capable of producing a tornado
was located 12 miles east of Iron Mountain, or 31 miles south of
Wheatland, moving east at 35 mph.

HAZARD...Tornado and half dollar size hail.

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
northwestern Laramie and south central Platte Counties.

This includes Interstate 25 in Wyoming between mile markers 36 and 
43. This tornado warning does not include the city of Cheyenne. 
 
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.

&&

LAT...LON 4150 10514 4173 10515 4172 10486 4149 10487
TIME...MOT...LOC 2034Z 265DEG 30KT 4160 10498 

TORNADO...RADAR INDICATED
HAIL...1.25IN

$$

Cox

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 18, 6:33 PM MDT	Special Weather Statement	CYS	Goshen	42 min
Jun 18, 6:44 PM MDT	Special Weather Statement	CYS	Converse	46 min
Jun 18, 6:48 PM MDT	Severe Thunderstorm Warning	CYS	Goshen, Laramie	42 min
Jun 18, 7:30 PM MDT	Special Weather Statement	CYS	Laramie	45 min
Jun 19, 4:20 AM MDT	Special Weather Statement	CYS	Niobrara	40 min
Jun 19, 5:22 AM MDT	Special Weather Statement	CYS		38 min
Jun 19, 7:17 AM MDT	Special Weather Statement	CYS		43 min
Jun 19, 7:40 AM MDT	Special Weather Statement	CYS	Niobrara	35 min
Jun 19, 7:44 AM MDT	Special Weather Statement	CYS	Converse	46 min
Jun 19, 8:14 AM MDT	Special Weather Statement	CYS	Niobrara	46 min
Jun 19, 8:27 AM MDT	Special Weather Statement	CYS	Converse	48 min
Jun 19, 9:17 AM MDT	Special Weather Statement	CYS	Niobrara	43 min
Jun 19, 11:42 AM MDT	Special Weather Statement	CYS		48 min
Jun 19, 12:00 PM MDT	Severe Thunderstorm Warning	CYS	Carbon	45 min
Jun 19, 12:52 PM MDT	Special Weather Statement	CYS	Albany	53 min
Jun 19, 12:58 PM MDT	Special Weather Statement	CYS		47 min
Jun 19, 1:03 PM MDT	Special Weather Statement	CYS	Laramie	42 min
Jun 19, 1:10 PM MDT	Special Weather Statement	CYS	Platte	50 min
Jun 19, 1:24 PM MDT	Severe Thunderstorm Warning	CYS	Laramie, Platte	34 min
Jun 19, 1:38 PM MDT	Tornado Warning	CYS	Albany	37 min
Jun 19, 2:30 PM MDT	Tornado Warning Tornado observed	CYS	Platte	17 min
Jun 19, 2:42 PM MDT	Tornado Warning	CYS	Goshen, Laramie, Platte	48 min
Jun 19, 3:20 PM MDT	Severe Thunderstorm Warning	CYS	Laramie	40 min
Jun 19, 3:29 PM MDT	Severe Thunderstorm Warning	CYS	Laramie	61 min
Jun 19, 3:41 PM MDT	Severe Thunderstorm Warning	CYS	Laramie	49 min
Jun 19, 4:07 PM MDT	Severe Thunderstorm Warning	CYS	Laramie	38 min
Jun 19, 4:38 PM MDT	Severe Thunderstorm Warning	CYS	Laramie	52 min

Nearby

Tornado Warnings in Wyoming, 2018 Every tornado warning in 2018 Tornadoes in 2018

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.