Alert archive / Wyoming / Tornado Warnings in 2012

Tornado Warning 8, NWS Cheyenne, WY

June 7, 2012Goshen County, Platte County, Wyoming

NWS Cheyenne, WY issued this tornado warning at Jun 7, 2012, 4:29 PM MDT for Goshen County, Platte 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 7, 2012, 4:29 PM MDT (22:29 UTC)
Expired: Jun 7, 2012, 5:00 PM MDT
In force: 31 min
Issued by: NWS Cheyenne, WY
Area: Storm-based polygon

Counties Goshen County, WY, Platte County, WY

The radar

The Cheyenne radar (KCYS), 66 km from the middle of the area, began a volume at 22:32 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, 4:35 PM MDT	HAIL 1	11 E Chugwater, 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, 10.5 hours before the alert went out and 239 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.

018 
WFUS55 KCYS 072229 RRA
TORCYS
WYC015-031-072300-
/O.NEW.KCYS.TO.W.0008.120607T2229Z-120607T2300Z/

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

THE NATIONAL WEATHER SERVICE IN CHEYENNE HAS ISSUED A

* TORNADO WARNING FOR...
  SOUTHWESTERN GOSHEN COUNTY IN SOUTHEAST WYOMING...
  SOUTHEASTERN PLATTE COUNTY IN SOUTHEAST WYOMING...

* UNTIL 500 PM MDT

* AT 423 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A 
SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS STORM HAD A 
HISTORY OF PRODUCING A TORNADO AS IT MOVED NEAR AND SOUTH OF 
WHEATLAND.  THIS DANGEROUS STORM WAS LOCATED 6 MILES NORTHEAST OF 
CHUGWATER...OR 21 MILES SOUTHEAST OF WHEATLAND...AND MOVING 
SOUTHEAST AT 25 MPH.

  IN ADDITION...AT QUARTER SIZED HAIL HAS BEEN REPORTED WITH THIS 
STORM.

* LOCATIONS IMPACTED INCLUDE...
  MAINLY RURAL AREAS OF EXTREME SOUTHEASTERN PLATTE AND SOUTHWESTERN
  GOSHEN COUNTIES.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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 10488 4193 10474 4180 10431 4157 10449
      4157 10453
TIME...MOT...LOC 2226Z 310DEG 24KT 4178 10471

$$

FINCH

1 follow-up statement

581 
WWUS55 KCYS 072252
SVSCYS

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

WYC015-031-072301-
/O.EXP.KCYS.TO.W.0008.000000T0000Z-120607T2300Z/
GOSHEN WY-PLATTE WY-
452 PM MDT THU JUN 7 2012

...THE TORNADO WARNING FOR SOUTHEASTERN PLATTE AND SOUTHWESTERN
GOSHEN COUNTIES WILL EXPIRE AT 500 PM MDT...

THE TORNADO THREAT HAS DIMINISHED...THEREFORE THE TORNADO WARNING HAS
EXPIRED. HOWEVER...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT 
FOR THE AREA.

LAT...LON 4177 10488 4193 10474 4180 10431 4157 10449
      4157 10453
TIME...MOT...LOC 2251Z 310DEG 24KT 4167 10454

$$

HAMMER

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, 2:54 PM MDT	Tornado Warning	CYS	Platte	51 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, 4:52 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.