Alert archive / Wyoming / Tornado Warnings in 2015

Tornado Warning 7, NWS Cheyenne, WY

June 15, 2015Carbon County, Wyoming

NWS Cheyenne, WY issued this tornado warning at Jun 15, 2015, 4:02 PM MDT for 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 15, 2015, 4:02 PM MDT (22:02 UTC)
Expired: Jun 15, 2015, 4:30 PM MDT
In force: 28 min
Issued by: NWS Cheyenne, WY
Area: Storm-based polygon
Tornado: Observed
Hail: 0.75 in

County Carbon County, WY

The radar

The Cheyenne radar (KCYS), 137 km from the middle of the area, began a volume at 22:05 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 15, 4:08 PM MDT	TORNADO	8 Ne Elk Mountain, WY

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 15, 2:24 PM MDT	Severe Thunderstorm Watch	SPC	8 hr

The nearest sounding before it

Riverton, WY (KRIW), launched 12:00Z, 10.0 hours before the alert went out and 230 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: 889 m above ground
0-6 km bulk shear: 43 kt
0-1 km storm-relative helicity: 106 m²/s²
0-3 km storm-relative helicity: 345 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

982 
WFUS55 KCYS 152202
TORCYS
WYC007-152230-
/O.NEW.KCYS.TO.W.0007.150615T2202Z-150615T2230Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE CHEYENNE WY
402 PM MDT MON JUN 15 2015

THE NATIONAL WEATHER SERVICE IN CHEYENNE HAS ISSUED A

* TORNADO WARNING FOR...
  EAST CENTRAL CARBON COUNTY IN SOUTH CENTRAL WYOMING...

* UNTIL 430 PM MDT

* AT 402 PM MDT...A CONFIRMED TORNADO WAS LOCATED 7 MILES NORTHEAST
  OF ELK MOUNTAIN...OR 46 MILES EAST OF RAWLINS...MOVING EAST AT 15
  MPH.

  HAZARD...TORNADO. 

  SOURCE...PUBLIC CONFIRMED TORNADO. 

  IMPACT...EXPECT DAMAGE TO MOBILE HOMES...ROOFS AND VEHICLES. 

* THIS TORNADIC THUNDERSTORM WILL REMAIN OVER MAINLY RURAL AREAS OF
  EAST CENTRAL CARBON COUNTY.

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 IN A MOBILE HOME...A VEHICLE OR
OUTDOORS...MOVE TO THE CLOSEST SUBSTANTIAL SHELTER AND PROTECT
YOURSELF FROM FLYING DEBRIS.

&&

LAT...LON 4174 10637 4184 10632 4182 10608 4158 10608
TIME...MOT...LOC 2202Z 284DEG 12KT 4177 10632 

TORNADO...OBSERVED
HAIL...<.75IN

$$

HAHN

2 follow-up statements

800 
WWUS55 KCYS 152217
SVSCYS

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHEYENNE WY
417 PM MDT MON JUN 15 2015

WYC007-152230-
/O.CON.KCYS.TO.W.0007.000000T0000Z-150615T2230Z/
CARBON WY-
417 PM MDT MON JUN 15 2015

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 430 PM MDT FOR EAST
CENTRAL CARBON COUNTY...
    
AT 416 PM MDT...A CONFIRMED TORNADO WAS LOCATED 8 MILES EAST OF
MEDICINE BOW...OR 49 MILES NORTHWEST OF LARAMIE...AND IS MOVING
EAST AT 10 MPH.

HAZARD...TORNADO. 

SOURCE...STORM CHASERS AND PUBLIC CONFIRMED TORNADO. 

IMPACT...EXPECT DAMAGE TO MOBILE HOMES...ROOFS AND VEHICLES. 

THIS TORNADIC THUNDERSTORM WILL REMAIN OVER MAINLY RURAL AREAS OF
EAST CENTRAL CARBON COUNTY.

LAT...LON 4174 10637 4184 10632 4182 10608 4158 10608
TIME...MOT...LOC 2216Z 284DEG 12KT 4194 10604 

TORNADO...OBSERVED
HAIL...<.75IN

$$

TJT

888 
WWUS55 KCYS 152227
SVSCYS

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHEYENNE WY
427 PM MDT MON JUN 15 2015

WYC007-152235-
/O.EXP.KCYS.TO.W.0007.000000T0000Z-150615T2230Z/
CARBON WY-
427 PM MDT MON JUN 15 2015

...THE TORNADO WARNING FOR EAST CENTRAL CARBON COUNTY WILL EXPIRE AT
430 PM MDT...
        
THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE LIMITS
AND EXITED THE WARNED AREA. THEREFORE THE WARNING WILL BE ALLOWED TO
EXPIRE.  HOWEVER GUSTY WINDS ARE STILL POSSIBLE WITH THIS
THUNDERSTORM.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1100 PM MDT FOR
SOUTH CENTRAL WYOMING.

LAT...LON 4174 10637 4184 10632 4182 10608 4158 10608
TIME...MOT...LOC 2222Z 284DEG 12KT 4194 10604 

$$

TJT

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 14, 6:29 PM MDT	Severe Thunderstorm Warning	CYS	Laramie	46 min
Jun 14, 6:31 PM MDT	Special Weather Statement	CYS	Niobrara	44 min
Jun 14, 7:02 PM MDT	Special Weather Statement	CYS	Laramie	28 min
Jun 14, 7:04 PM MDT	Severe Thunderstorm Warning	CYS	Laramie	26 min
Jun 14, 7:26 PM MDT	Special Weather Statement	CYS	Laramie	49 min
Jun 14, 7:50 PM MDT	Severe Thunderstorm Warning	CYS	Laramie	25 min
Jun 14, 8:22 PM MDT	Special Weather Statement	CYS	Laramie	23 min
Jun 14, 8:36 PM MDT	Areal Flood Advisory	CYS	Laramie	4 hr
Jun 14, 10:03 PM MDT	Areal Flood Advisory	CYS	Laramie	3 hr
Jun 15, 2:31 AM MDT	Flash Flood Watch	CYS	Albany, Converse, Niobrara, Platte	24 hr
Jun 15, 1:43 PM MDT	Special Weather Statement	CYS	Carbon	47 min
Jun 15, 2:24 PM MDT	Special Weather Statement	CYS		51 min
Jun 15, 2:26 PM MDT	Special Weather Statement	CYS	Carbon	49 min
Jun 15, 2:46 PM MDT	Severe Thunderstorm Warning	CYS	Carbon	33 min
Jun 15, 3:18 PM MDT	Special Weather Statement	CYS	Albany	42 min
Jun 15, 4:11 PM MDT	Special Weather Statement	CYS	Albany	34 min
Jun 15, 4:33 PM MDT	Special Weather Statement	CYS	Platte	42 min
Jun 15, 4:53 PM MDT	Severe Thunderstorm Warning	CYS	Platte	37 min

Nearby

Tornado Warnings in Wyoming, 2015 Every tornado warning in 2015 Tornadoes in 2015

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.