Alert archive / Wyoming / Tornado Warnings in 2016

Tornado Warning 13, NWS Cheyenne, WY

July 27, 2016Goshen County, Niobrara County, Wyoming

NWS Cheyenne, WY issued this tornado warning at Jul 27, 2016, 8:10 PM MDT for Goshen County, Niobrara County, Wyoming. It was in force for 50 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: Jul 27, 2016, 8:10 PM MDT (02:10 UTC)
Expired: Jul 27, 2016, 9:00 PM MDT
In force: 50 min
Issued by: NWS Cheyenne, WY
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 2.5 in

Counties Goshen County, WY, Niobrara County, WY

The radar

The Cheyenne radar (KCYS), 160 km from the middle of the area, began a volume at 02:11 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
Jul 27, 8:10 PM MDT	HAIL 1.5	Manville, WY
Jul 27, 8:10 PM MDT	HAIL 2.5	Manville, WY

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

The nearest sounding before it

Rapid City, SD (KRAP), launched 00:00Z, 2.2 hours before the alert went out and 215 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: 470 J/kg
Mixed-layer CIN: -100 J/kg
Mixed-layer LCL: 1394 m above ground
0-6 km bulk shear: 43 kt
0-1 km storm-relative helicity: 53 m²/s²
0-3 km storm-relative helicity: 217 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 2.2

Open this sounding in Storm Lab

The text

As transmitted.

421 
WFUS55 KCYS 280210
TORCYS
WYC015-027-280300-
/O.NEW.KCYS.TO.W.0013.160728T0210Z-160728T0300Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE CHEYENNE WY
810 PM MDT WED JUL 27 2016

THE NATIONAL WEATHER SERVICE IN CHEYENNE HAS ISSUED A

* TORNADO WARNING FOR...
  NORTHWESTERN GOSHEN COUNTY IN SOUTHEASTERN WYOMING...
  SOUTH CENTRAL NIOBRARA COUNTY IN EAST CENTRAL WYOMING...

* UNTIL 900 PM MDT
    
* AT 810 PM MDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A
  TORNADO WAS LOCATED 7 MILES NORTHWEST OF RAWHIDE BUTTES...OR 9
  MILES SOUTHWEST OF LUSK...MOVING SOUTHEAST AT 40 MPH.

  HAZARD...TORNADO AND TENNIS BALL SIZE HAIL. 80 MPH WINDS ARE ALSO
           POSSIBLE.

  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...
  RAWHIDE BUTTES AROUND 820 PM MDT. 
  JAY EM AROUND 835 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.

&&

LAT...LON 4275 10474 4281 10450 4234 10419 4224 10452
      4257 10465 4261 10465
TIME...MOT...LOC 0210Z 336DEG 35KT 4266 10458 

TORNADO...RADAR INDICATED
HAIL...2.50IN

$$

COX

4 follow-up statements

939 
WWUS55 KCYS 280224
SVSCYS

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHEYENNE WY
824 PM MDT WED JUL 27 2016

WYC015-027-280300-
/O.CON.KCYS.TO.W.0013.000000T0000Z-160728T0300Z/
GOSHEN WY-NIOBRARA WY-
824 PM MDT WED JUL 27 2016

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 900 PM MDT FOR
NORTHWESTERN GOSHEN AND SOUTH CENTRAL NIOBRARA COUNTIES...
    
AT 823 PM MDT...A LARGE SEVERE THUNDERSTORM CAPABLE OF PRODUCING A
TORNADO WAS LOCATED NEAR RAWHIDE BUTTES...OR 16 MILES SOUTH OF
LUSK...MOVING SOUTH AT 40 MPH.

HAZARD...TORNADO AND TENNIS BALL SIZE HAIL. 80 MPH WINDS ARE ALSO
         POSSIBLE.

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 GOSHEN AND SOUTH CENTRAL NIOBRARA COUNTIES.

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 4267 10468 4273 10445 4234 10419 4224 10452
      4257 10465 4261 10465
TIME...MOT...LOC 0223Z 345DEG 36KT 4254 10456 

TORNADO...RADAR INDICATED
HAIL...2.50IN

$$

COX

358 
WWUS55 KCYS 280237
SVSCYS

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHEYENNE WY
837 PM MDT WED JUL 27 2016

WYC015-027-280300-
/O.CON.KCYS.TO.W.0013.000000T0000Z-160728T0300Z/
GOSHEN WY-NIOBRARA WY-
837 PM MDT WED JUL 27 2016

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 900 PM MDT FOR
NORTHWESTERN GOSHEN AND SOUTHERN NIOBRARA COUNTIES...
    
AT 834 PM MDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO
WAS LOCATED NEAR RAWHIDE BUTTES...OR 19 MILES SOUTH OF LUSK...MOVING
SOUTHEAST AT 35 MPH.

HAZARD...TORNADO AND TENNIS BALL SIZE HAIL. WINDS UP TO 70 MPH ALSO
         POSSIBLE.

SOURCE...RADAR INDICATED ROTATION. SPOTTERS REPORTED TENNIS BALL
         SIZE HAIL IN MANVILLE.

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...
RAWHIDE BUTTES AND JAY EM. 

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 4261 10465 4261 10440 4234 10419 4224 10452
      4257 10465
TIME...MOT...LOC 0234Z 335DEG 31KT 4249 10450 

TORNADO...RADAR INDICATED
HAIL...2.50IN

$$

COX

324 
WWUS55 KCYS 280246
SVSCYS

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHEYENNE WY
846 PM MDT WED JUL 27 2016

WYC027-280255-
/O.CAN.KCYS.TO.W.0013.000000T0000Z-160728T0300Z/
NIOBRARA WY-
846 PM MDT WED JUL 27 2016

...THE TORNADO WARNING FOR SOUTHERN NIOBRARA COUNTY IS CANCELLED...
    
THE TORNADIC THUNDERSTORM WHICH PROMPTED THE WARNING HAS MOVED OUT
OF THE AREA. THEREFORE THE WARNING HAS BEEN CANCELLED.

LAT...LON 4251 10457 4256 10444 4234 10419 4224 10452
      4248 10462
TIME...MOT...LOC 0245Z 335DEG 30KT 4241 10446 

$$

WYC015-280300-
/O.CON.KCYS.TO.W.0013.000000T0000Z-160728T0300Z/
GOSHEN WY-
846 PM MDT WED JUL 27 2016

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 900 PM MDT FOR
NORTHWESTERN GOSHEN COUNTY...
    
AT 845 PM MDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO
WAS LOCATED NEAR JAY EM...OR 23 MILES SOUTH OF LUSK...MOVING
SOUTHEAST AT 35 MPH.

HAZARD...TORNADO AND TENNIS BALL SIZE HAIL. 80 MPH WINDS ARE ALSO
         POSSIBLE. 

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...
JAY EM.

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 4251 10457 4256 10444 4234 10419 4224 10452
      4248 10462
TIME...MOT...LOC 0245Z 335DEG 30KT 4241 10446 

TORNADO...RADAR INDICATED
HAIL...2.50IN

$$

COX

289 
WWUS55 KCYS 280257
SVSCYS

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHEYENNE WY
857 PM MDT WED JUL 27 2016

WYC015-280306-
/O.EXP.KCYS.TO.W.0013.000000T0000Z-160728T0300Z/
GOSHEN WY-
857 PM MDT WED JUL 27 2016

...THE TORNADO WARNING FOR NORTHWESTERN GOSHEN COUNTY WILL EXPIRE AT
900 PM MDT...
    
THE TORNADO WARNING THAT WAS PREVIOUSLY IN EFFECT HAS BEEN REISSUED
FOR GOSHEN COUNTY AND IS IN EFFECT UNTIL 930 PM. PLEASE REFER TO
THAT BULLETIN FOR THE LATEST SEVERE WEATHER INFORMATION. HOWEVER
SMALL HAIL AND GUSTY WINDS ARE STILL POSSIBLE WITH THIS THUNDERSTORM.

REMEMBER...A TORNADO WARNING STILL REMAINS IN EFFECT FOR NORTHERN
GOSHEN COUNTY UNTIL TIME 930 PM.

LAT...LON 4251 10457 4256 10444 4234 10419 4224 10452
      4248 10462
TIME...MOT...LOC 0254Z 336DEG 35KT 4241 10446 

$$

COX

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 27, 6:25 PM MDT	Severe Thunderstorm Warning	CYS	Converse, Niobrara	50 min
Jul 27, 6:59 PM MDT	Severe Thunderstorm Warning	CYS	Converse, Niobrara	46 min
Jul 27, 7:37 PM MDT	Tornado Warning	CYS	Niobrara	38 min
Jul 27, 8:54 PM MDT	Tornado Warning	CYS	Goshen	17 min
Jul 27, 9:08 PM MDT	Severe Thunderstorm Warning	CYS	Goshen	37 min
Jul 27, 9:37 PM MDT	Severe Thunderstorm Warning	CYS	Goshen	38 min
Jul 27, 10:15 PM MDT	Severe Thunderstorm Warning	CYS	Goshen, Laramie	19 min
Jul 27, 10:24 PM MDT	Special Weather Statement	CYS	Goshen	51 min
Jul 27, 10:31 PM MDT	Severe Thunderstorm Warning	CYS	Goshen, Laramie	29 min
Jul 28, 1:54 AM MDT	Special Weather Statement	CYS	Niobrara	66 min
Jul 28, 6:39 AM MDT	Special Weather Statement	CYS	Niobrara	66 min
Jul 28, 7:40 AM MDT	Special Weather Statement	CYS	Niobrara	50 min
Jul 28, 8:10 AM MDT	Severe Thunderstorm Warning	CYS	Goshen, Niobrara	35 min
Jul 28, 3:26 PM MDT	Special Weather Statement	CYS	Carbon	49 min
Jul 28, 3:53 PM MDT	Special Weather Statement	CYS	Albany	22 min
Jul 28, 4:13 PM MDT	Severe Thunderstorm Warning	CYS	Albany, Laramie	32 min
Jul 28, 4:54 PM MDT	Severe Thunderstorm Warning	CYS	Laramie	51 min
Jul 28, 5:29 PM MDT	Special Weather Statement	CYS	Laramie	16 min

Nearby

Tornado Warnings in Wyoming, 2016 Every tornado warning in 2016 Tornadoes in 2016

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.