Alert archive / Wyoming / Tornado Warnings in 2015

Tornado Warning 4, NWS Cheyenne, WY

May 15, 2015Goshen County, Wyoming

NWS Cheyenne, WY issued this tornado warning at May 15, 2015, 3:32 PM MDT for Goshen County, Wyoming. It was in force for 43 min. 2 reports 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: May 15, 2015, 3:32 PM MDT (21:32 UTC)
Expired: May 15, 2015, 4:15 PM MDT
In force: 43 min
Issued by: NWS Cheyenne, WY
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 1.0 in

County Goshen County, WY

The radar

The Cheyenne radar (KCYS), 103 km from the middle of the area, began a volume at 21:31 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
May 15, 3:48 PM MDT	TORNADO	3 S Torrington, WY
May 15, 3:55 PM MDT	TORNADO	Torrington, WY	POWER LINES DOWN. DAMAGE TO ROOFS AND OUTBUILDINGS.

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
May 15, 12:58 PM MDT	Tornado Watch	SPC	7 hr

The nearest sounding before it

Denver, CO (KDEN), launched 12:00Z, 9.5 hours before the alert went out and 252 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: 15 J/kg
Mixed-layer CIN: -265 J/kg
Mixed-layer LCL: 1417 m above ground
0-6 km bulk shear: 24 kt
0-1 km storm-relative helicity: -28 m²/s²
0-3 km storm-relative helicity: -6 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.

303 
WFUS55 KCYS 152132
TORCYS
WYC015-152215-
/O.NEW.KCYS.TO.W.0004.150515T2132Z-150515T2215Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE CHEYENNE WY
332 PM MDT FRI MAY 15 2015

THE NATIONAL WEATHER SERVICE IN CHEYENNE HAS ISSUED A

* TORNADO WARNING FOR...
  CENTRAL GOSHEN COUNTY IN SOUTHEASTERN WYOMING...

* UNTIL 415 PM MDT
    
* AT 332 PM MDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A
  TORNADO WAS LOCATED OVER YODER...OR 11 MILES SOUTH OF TORRINGTON...
  MOVING NORTH AT 30 MPH.

  HAZARD...TORNADO AND QUARTER 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. 

* LOCATIONS IMPACTED INCLUDE...
  TORRINGTON...LINGLE...YODER AND VETERAN. 

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

TO REPORT SEVERE WEATHER CONTACT YOUR NEAREST LAW ENFORCEMENT AGENCY.
THEY WILL SEND YOUR REPORT TO THE NATIONAL WEATHER SERVICE OFFICE IN
CHEYENNE.

&&

LAT...LON 4180 10425 4182 10441 4227 10442 4227 10407
TIME...MOT...LOC 2132Z 182DEG 27KT 4191 10427 

TORNADO...RADAR INDICATED
HAIL...1.00IN

$$

RUBIN

2 follow-up statements

142 
WWUS55 KCYS 152144
SVSCYS

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHEYENNE WY
344 PM MDT FRI MAY 15 2015

WYC015-152215-
/O.CON.KCYS.TO.W.0004.000000T0000Z-150515T2215Z/
GOSHEN WY-
344 PM MDT FRI MAY 15 2015

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 415 PM MDT FOR CENTRAL
GOSHEN COUNTY...
    
AT 343 PM MDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO
WAS LOCATED NEAR YODER...OR NEAR TORRINGTON...MOVING NORTH AT 30 MPH.

HAZARD...TORNADO AND QUARTER 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...
  TORRINGTON AROUND 400 PM MDT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

&&

LAT...LON 4190 10421 4196 10441 4227 10442 4227 10407
TIME...MOT...LOC 2143Z 191DEG 24KT 4197 10423 

TORNADO...RADAR INDICATED
HAIL...1.00IN

$$

RUBIN

652 
WWUS55 KCYS 152148
SVSCYS

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHEYENNE WY
348 PM MDT FRI MAY 15 2015

WYC015-152215-
/O.CON.KCYS.TO.W.0004.000000T0000Z-150515T2215Z/
GOSHEN WY-
348 PM MDT FRI MAY 15 2015

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 415 PM MDT FOR CENTRAL
GOSHEN COUNTY...
        
AT 347 PM MDT...A CONFIRMED TORNADO WAS LOCATED NEAR TORRINGTON...
MOVING NORTH AT 30 MPH.

HAZARD...DAMAGING TORNADO AND QUARTER SIZE HAIL. 

SOURCE...EMERGENCY MANAGEMENT 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 TORNADO WILL BE NEAR...
  TORRINGTON AROUND 400 PM MDT.
  LINGLE AROUND 405 PM MDT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

MOTORISTS SHOULD NOT TAKE SHELTER UNDER HIGHWAY OVERPASSES. IF YOU
CANNOT SAFELY DRIVE AWAY FROM THE TORNADO...AS A LAST RESORT...EITHER
PARK YOUR VEHICLE AND STAY PUT...OR ABANDON YOUR VEHICLE AND LIE DOWN
IN A LOW LYING AREA AND PROTECT YOURSELF FROM FLYING DEBRIS.

&&

LAT...LON 4192 10420 4199 10441 4227 10442 4227 10407
TIME...MOT...LOC 2147Z 182DEG 27KT 4201 10423 

TORNADO...OBSERVED
HAIL...1.00IN

$$

RUBIN/HAHN

The office that day

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

Issued	Product	Office	Counties	Lasted
May 15, 1:22 AM MDT	Special Weather Statement	CYS	Goshen	38 min
May 15, 1:02 PM MDT	Special Weather Statement	CYS	Albany	43 min
May 15, 1:58 PM MDT	Special Weather Statement	CYS	Albany	47 min
May 15, 2:31 PM MDT	Special Weather Statement	CYS	Goshen	44 min
May 15, 2:50 PM MDT	Severe Thunderstorm Warning	CYS	Goshen	30 min
May 15, 2:55 PM MDT	Special Weather Statement	CYS	Converse	35 min
May 15, 3:13 PM MDT	Special Weather Statement	CYS	Laramie	47 min
May 15, 3:18 PM MDT	Severe Thunderstorm Warning	CYS	Goshen	57 min
May 15, 3:27 PM MDT	Special Weather Statement	CYS	Laramie	63 min
May 15, 4:00 PM MDT	Tornado Warning Tornado observed	CYS	Goshen	45 min
May 15, 4:04 PM MDT	Special Weather Statement	CYS	Goshen	26 min
May 15, 5:28 PM MDT	Areal Flood Advisory	CYS	Goshen	5 hr

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.