Alert archive / Wyoming / Tornado Warnings in 2012

Tornado Warning 5, NWS Cheyenne, WY

June 7, 2012Platte County, Wyoming

NWS Cheyenne, WY issued this tornado warning at Jun 7, 2012, 2:54 PM MDT for Platte County, Wyoming. It was in force for 51 min. 8 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: Jun 7, 2012, 2:54 PM MDT (20:54 UTC)
Expired: Jun 7, 2012, 3:45 PM MDT
In force: 51 min
Issued by: NWS Cheyenne, WY
Area: Storm-based polygon

County Platte County, WY

The radar

The Cheyenne radar (KCYS), 99 km from the middle of the area, began a volume at 20:56 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 7, 3:00 PM MDT	HAIL 1	3 Wsw Wheatland, WY
Jun 7, 3:00 PM MDT	HAIL 1.75	1 Nw Bordeaux, WY
Jun 7, 3:07 PM MDT	TORNADO	6 W Wheatland, WY	TORNADO ON THE GROUND 6 TO 8 MILES WEST OF WHEATLAND ON PALMER CANYON ROAD.
Jun 7, 3:20 PM MDT	HAIL 1.5	2 S Wheatland, WY
Jun 7, 3:29 PM MDT	HAIL 1	6 Sw Wheatland, WY
Jun 7, 3:32 PM MDT	TORNADO	7 S Wheatland, WY	TORNADO STILL ON THE GROUND AND WILL CROSS INTERSTATE 25 JUST NORTH OF THE BORDEAUX EXIT.
Jun 7, 3:45 PM MDT	TSTM WND GST 75	Bordeaux, WY	WINDS WERE SUSTAINED AT 59 MPH.
Jun 7, 3:45 PM MDT	HAIL 1	3 Ese Bordeaux, 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 7, 11:46 AM MDT	Tornado Watch	SPC	10 hr

The nearest sounding before it

Denver, CO (KDNR), launched 12:00Z, 8.9 hours before the alert went out and 283 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: 1398 J/kg
Mixed-layer CIN: -35 J/kg
Mixed-layer LCL: 671 m above ground
0-6 km bulk shear: 34 kt
0-1 km storm-relative helicity: 42 m²/s²
0-3 km storm-relative helicity: 105 m²/s²
Significant tornado parameter: 0.4
Supercell composite: 1.8

Open this sounding in Storm Lab

The text

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

897 
WFUS55 KCYS 072054
TORCYS
WYC031-072145-
/O.NEW.KCYS.TO.W.0005.120607T2054Z-120607T2145Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE CHEYENNE WY
254 PM MDT THU JUN 7 2012

THE NATIONAL WEATHER SERVICE IN CHEYENNE HAS ISSUED A

* TORNADO WARNING FOR...
  SOUTHERN PLATTE COUNTY IN SOUTHEAST WYOMING...

* UNTIL 345 PM MDT

* AT 251 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS
  STORM WAS LOCATED 10 MILES WEST OF WHEATLAND...AND MOVING SOUTHEAST
  AT 25 MPH.

* LOCATIONS IMPACTED INCLUDE...
  WHEATLAND AND BORDEAUX.

THIS INCLUDES INTERSTATE 25 IN WYOMING BETWEEN MILE MARKERS 60 AND
86.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS TORNADO WARNING REPLACES THE SEVERE THUNDERSTORM WARNING THAT
WAS IN EFFECT FOR THE SAME AREA.

&&

LAT...LON 4206 10528 4210 10528 4222 10515 4202 10465
      4198 10465 4177 10484
TIME...MOT...LOC 2054Z 307DEG 21KT 4209 10512

$$

FINCH

2 follow-up statements

752 
WWUS55 KCYS 072110
SVSCYS

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHEYENNE WY
310 PM MDT THU JUN 7 2012

WYC031-072145-
/O.CON.KCYS.TO.W.0005.000000T0000Z-120607T2145Z/
PLATTE WY-
310 PM MDT THU JUN 7 2012

...A TORNADO WARNING REMAINS IN EFFECT FOR SOUTHERN PLATTE COUNTY
UNTIL 345 PM MDT...

AT 305 PM MDT...TRAINED WEATHER SPOTTERS REPORTED A TORNADO.  THIS 
TORNADO WAS LOCATED ABOUT 5 MILES WEST OF WHEATLAND...MOVING 
SOUTHEAST AT 25 MPH.

IN ADDITION...GOLF BALL SIZED HAIL HAS BEEN REPORTED WITH THIS STORM.

LOCATIONS IMPACTED INCLUDE...
  WHEATLAND AND BORDEAUX.

THIS INCLUDES INTERSTATE 25 IN WYOMING BETWEEN MILE MARKERS 60 AND
87.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TO REPEAT...A TORNADO IS ON THE GROUND. TAKE COVER NOW. MOVE TO AN
INTERIOR ROOM ON THE LOWEST FLOOR OF A STURDY BUILDING. AVOID
WINDOWS. IF IN A MOBILE HOME...A VEHICLE OR OUTDOORS...MOVE TO THE
CLOSEST SUBSTANTIAL SHELTER AND PROTECT YOURSELF FROM FLYING DEBRIS.

&&

LAT...LON 4177 10484 4203 10524 4220 10511 4202 10466
      4198 10465
TIME...MOT...LOC 2109Z 307DEG 21KT 4204 10503

$$

FINCH

100 
WWUS55 KCYS 072129
SVSCYS

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHEYENNE WY
329 PM MDT THU JUN 7 2012

WYC031-072145-
/O.CON.KCYS.TO.W.0005.000000T0000Z-120607T2145Z/
PLATTE WY-
329 PM MDT THU JUN 7 2012

...A TORNADO WARNING REMAINS IN EFFECT FOR SOUTHERN PLATTE COUNTY
UNTIL 345 PM MDT...

AT 323 PM MDT...TRAINED WEATHER SPOTTERS REPORTED A TORNADO.  THIS 
TORNADO WAS LOCATED 5 MILES SOUTHWEST OF WHEATLAND...MOVING 
SOUTHEAST AT 25 MPH.

IN ADDITION GOLFBALL SIZED HAIL HAS BEEN REPORTED WITH THIS STORM.

LOCATIONS IMPACTED INCLUDE...
  MAINLY RURAL AREAS OF CENTRAL PLATTE COUNTY.

THIS INCLUDES INTERSTATE 25 IN WYOMING BETWEEN MILE MARKERS 60 AND
86.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TO REPEAT...A TORNADO IS ON THE GROUND. TAKE COVER NOW. MOVE TO AN
INTERIOR ROOM ON THE LOWEST FLOOR OF A STURDY BUILDING. AVOID
WINDOWS. IF IN A MOBILE HOME...A VEHICLE OR OUTDOORS...MOVE TO THE
CLOSEST SUBSTANTIAL SHELTER AND PROTECT YOURSELF FROM FLYING DEBRIS.

HEAVY RAINFALL MAY OBSCURE THIS TORNADO. DO NOT WAIT TO SEE OR HEAR
THE TORNADO. TAKE COVER NOW.

&&

LAT...LON 4177 10484 4199 10518 4216 10501 4202 10466
      4198 10465
TIME...MOT...LOC 2126Z 307DEG 21KT 4198 10492

$$

FINCH

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 6, 6:01 PM MDT	Special Weather Statement	CYS	Albany	44 min
Jun 6, 6:17 PM MDT	Severe Thunderstorm Warning	CYS	Laramie	58 min
Jun 6, 6:49 PM MDT	Special Weather Statement	CYS	Platte	56 min
Jun 6, 6:51 PM MDT	Special Weather Statement	CYS	Laramie	54 min
Jun 6, 7:48 PM MDT	Special Weather Statement	CYS	Goshen	57 min
Jun 6, 7:52 PM MDT	Special Weather Statement	CYS	Laramie	53 min
Jun 6, 8:53 PM MDT	Special Weather Statement	CYS	Laramie	67 min
Jun 6, 8:54 PM MDT	Special Weather Statement	CYS	Goshen	51 min
Jun 6, 10:45 PM MDT	Special Weather Statement	CYS	Laramie	60 min
Jun 6, 10:48 PM MDT	Areal Flood Advisory	CYS	Goshen, Laramie	3 hr
Jun 6, 11:25 PM MDT	Flash Flood Warning	CYS	Laramie	2 hr
Jun 7, 9:45 AM MDT	Special Weather Statement	CYS	Laramie	90 min
Jun 7, 11:07 AM MDT	Special Weather Statement	CYS	Albany	53 min
Jun 7, 12:00 PM MDT	Flash Flood Watch	CYS	Goshen, Laramie	9 hr
Jun 7, 12:11 PM MDT	Special Weather Statement	CYS	Converse	64 min
Jun 7, 12:43 PM MDT	Special Weather Statement	CYS	Niobrara	47 min
Jun 7, 2:10 PM MDT	Severe Thunderstorm Warning	CYS	Albany, Converse, Platte	65 min
Jun 7, 2:30 PM MDT	Severe Thunderstorm Warning	CYS	Converse	46 min
Jun 7, 2:49 PM MDT	Special Weather Statement	CYS	Laramie	56 min
Jun 7, 2:51 PM MDT	Severe Thunderstorm Warning	CYS	Goshen, Platte	54 min
Jun 7, 3:05 PM MDT	Severe Thunderstorm Warning	CYS	Laramie	55 min
Jun 7, 3:22 PM MDT	Special Weather Statement	CYS	Laramie	38 min
Jun 7, 3:44 PM MDT	Tornado Warning	CYS	Goshen, Platte	46 min
Jun 7, 3:58 PM MDT	Special Weather Statement	CYS	Laramie	47 min
Jun 7, 4:00 PM MDT	Special Weather Statement	CYS	Laramie	45 min
Jun 7, 4:15 PM MDT	Severe Thunderstorm Warning	CYS	Goshen, Laramie	45 min
Jun 7, 4:22 PM MDT	Severe Thunderstorm Warning	CYS	Laramie	38 min
Jun 7, 4:29 PM MDT	Tornado Warning	CYS	Laramie	46 min
Jun 7, 4:29 PM MDT	Tornado Warning	CYS	Goshen, Platte	31 min
Jun 7, 4:52 PM MDT	Severe Thunderstorm Warning	CYS	Goshen, Laramie, Platte	53 min
Jun 7, 4:59 PM MDT	Severe Thunderstorm Warning	CYS	Laramie	61 min
Jun 7, 5:16 PM MDT	Tornado Warning	CYS	Laramie	44 min
Jun 7, 5:23 PM MDT	Flash Flood Warning	CYS	Laramie	2 hr
Jun 7, 5:29 PM MDT	Flash Flood Warning	CYS	Laramie, Platte	2 hr
Jun 7, 5:52 PM MDT	Tornado Warning	CYS	Laramie	38 min
Jun 7, 5:57 PM MDT	Severe Thunderstorm Warning	CYS	Laramie	63 min

Nearby

Tornado Warnings in Wyoming, 2012 Every tornado warning in 2012 Tornadoes in 2012

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.