Alert archive / Wyoming / Tornado Warnings in 2018

Tornado Warning 14, NWS Cheyenne, WY

June 6, 2018Albany County, Laramie County, Wyoming

NWS Cheyenne, WY issued this tornado warning at Jun 6, 2018, 6:29 PM MDT for Albany County, Laramie County, Wyoming. It was in force for 31 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, 2018, 6:29 PM MDT (00:29 UTC)
Expired: Jun 6, 2018, 7:00 PM MDT
In force: 31 min
Issued by: NWS Cheyenne, WY
Area: Storm-based polygon
Tornado: Observed
Hail: 0.0 in

Counties Albany County, WY, Laramie County, WY

The radar

The Cheyenne radar (KCYS), 59 km from the middle of the area, began a volume at 00:31 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, 6:37 PM MDT	TORNADO	10 Nne Laramie, WY	CORRECTED FOR LOCATION. RECEIVED VIA FACEBOOK PHOTO OF TORNADO ROPING OUT AND LIFTING.

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, 4:46 PM MDT	Severe Thunderstorm Watch	SPC	8 hr

The nearest sounding before it

Denver, CO (KDEN), launched 00:00Z, 0.5 hours before the alert went out and 253 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: 1161 J/kg
Mixed-layer CIN: -4 J/kg
Mixed-layer LCL: 3403 m above ground
0-6 km bulk shear: 24 kt
0-1 km storm-relative helicity: 16 m²/s²
0-3 km storm-relative helicity: 170 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.0

Open this sounding in Storm Lab

The text

As transmitted.

658 
WFUS55 KCYS 070029
TORCYS
WYC001-021-070100-
/O.NEW.KCYS.TO.W.0014.180607T0029Z-180607T0100Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Cheyenne WY
629 PM MDT WED JUN 6 2018

The National Weather Service in Cheyenne has issued a

* Tornado Warning for...
  East central Albany County in southeastern Wyoming...
  Western Laramie County in southeastern Wyoming...
  This does not include the city of Laramie.

* Until 700 PM MDT

* At 629 PM MDT, a confirmed tornado was located near Baldy Peak, or
  12 miles northeast of Laramie, moving east at 15 mph.

  HAZARD...Damaging tornado.

  SOURCE...Weather spotters confirmed tornado.

  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
  east central Albany and western Laramie Counties.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

To repeat, a tornado is on the ground. 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 4140 10551 4153 10552 4162 10528 4135 10528
      4135 10529
TIME...MOT...LOC 0029Z 265DEG 13KT 4146 10543 

TORNADO...OBSERVED
HAIL...0.00IN

$$

**AB**

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 6, 6:08 PM MDT	Tornado Warning Tornado observed	CYS	Albany	22 min
Jun 6, 6:58 PM MDT	Severe Thunderstorm Warning	CYS	Albany	47 min
Jun 6, 7:16 PM MDT	Special Weather Statement	CYS	Laramie	29 min
Jun 6, 7:29 PM MDT	Special Weather Statement	CYS	Laramie	46 min
Jun 6, 8:16 PM MDT	Severe Thunderstorm Warning	CYS	Laramie	29 min
Jun 6, 8:39 PM MDT	Areal Flood Advisory	CYS	Laramie	3 hr
Jun 6, 8:53 PM MDT	Severe Thunderstorm Warning	CYS	Laramie	52 min
Jun 7, 3:49 PM MDT	Special Weather Statement	CYS	Converse	41 min
Jun 7, 4:14 PM MDT	Special Weather Statement	CYS	Goshen	46 min
Jun 7, 4:36 PM MDT	Severe Thunderstorm Warning	CYS	Goshen	39 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.