Alert archive / Wyoming / Tornado Warnings in 2008

Tornado Warning 21, NWS Cheyenne, WY

May 23, 2008Goshen County, Wyoming

NWS Cheyenne, WY issued this tornado warning at May 23, 2008, 5:40 PM MDT for Goshen County, Wyoming. It was in force for 19 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: May 23, 2008, 5:40 PM MDT (23:40 UTC)
Expired: May 23, 2008, 5:59 PM MDT
In force: 19 min
Issued by: NWS Cheyenne, WY
Area: Storm-based polygon

County Goshen County, WY

The radar

The Cheyenne radar (KCYS), 81 km from the middle of the area, began a volume at 23:43 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.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Jan 7, 12:52 PM MST	Tornado Watch	SPC	146 days
May 23, 12:41 PM MDT	Tornado Watch	SPC	6 hr

The nearest sounding before it

Denver, CO (KDNR), launched 12:00Z, 11.7 hours before the alert went out and 240 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: 974 m above ground
0-6 km bulk shear: 87 kt
0-1 km storm-relative helicity: 96 m²/s²
0-3 km storm-relative helicity: 149 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.

000 
WFUS55 KCYS 232341
TORCYS
WYC015-240030-
/O.NEW.KCYS.TO.W.0021.080523T2340Z-080524T0030Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE CHEYENNE WY
540 PM MDT FRI MAY 23 2008

THE NATIONAL WEATHER SERVICE IN CHEYENNE HAS ISSUED A

* TORNADO WARNING FOR...
  SOUTH CENTRAL GOSHEN COUNTY IN SOUTHEAST WYOMING...

* UNTIL 630 PM MDT

* AT 535 PM MDT...TRAINED WEATHER SPOTTERS REPORTED A TORNADO 15
  MILES SOUTH OF HAWK SPRINGS...OR 34 MILES SOUTH OF TORRINGTON...
  MOVING NORTH AT 33 MPH.

* THE TORNADO WILL BE NEAR...
  HAWK SPRINGS BY 600 PM...
  GLOMILL RESERVOIR AND YODER BY 615 PM...
  VETERAN BY 620 PM...

THIS DOES NOT INCLUDE THE CITY OF TORRINGTON.

MOVE INTO A BASEMENT OR AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
STURDY BUILDING. ABANDON MOBILE HOMES AND VEHICLES.

REPORT SEVERE WEATHER TO THE NATIONAL WEATHER SERVICE OFFICE IN
CHEYENNE AT 1-800-269-6220.

LAT...LON 4199 10461 4202 10425 4157 10423 4157 10448
TIME...MOT...LOC 2340Z 172DEG 29KT 4163 10436

$$

SOWKO

2 follow-up statements

000 
WWUS55 KCYS 232350
SVSCYS

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHEYENNE WY
550 PM MDT FRI MAY 23 2008

WYC015-240030-
/O.CON.KCYS.TO.W.0021.000000T0000Z-080524T0030Z/
GOSHEN WY-
550 PM MDT FRI MAY 23 2008

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 630 PM MDT FOR CENTRAL
GOSHEN COUNTY...

AT 543 PM MDT...TRAINED WEATHER SPOTTERS REPORTED A TORNADO.  THIS
TORNADO WAS LOCATED 17 MILES SOUTHEAST OF GLOMILL RESERVOIR...OR 28
MILES SOUTH OF TORRINGTON...MOVING NORTH AT 39 MPH.

THE TORNADO WILL BE NEAR...
  YODER BY 605 PM...
  GLOMILL RESERVOIR AND VETERAN BY 610 PM...

A TORNADO WATCH REMAINS IN EFFECT UNTIL 700 PM FRIDAY EVENING FOR
CENTRAL NEBRASKA AND SOUTHEASTERN WYOMING.

REPORT SEVERE WEATHER TO THE NATIONAL WEATHER SERVICE OFFICE IN
CHEYENNE AT 1-800-269-6220.

LAT...LON 4166 10445 4198 10461 4199 10459 4202 10425
      4165 10431
TIME...MOT...LOC 2350Z 165DEG 34KT 4174 10438

$$

SOWKO

000 
WWUS55 KCYS 232359
SVSCYS

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHEYENNE WY
600 PM MDT FRI MAY 23 2008

WYC015-240010-
/O.CAN.KCYS.TO.W.0021.000000T0000Z-080524T0030Z/
GOSHEN WY-
600 PM MDT FRI MAY 23 2008

...THE TORNADO WARNING FOR CENTRAL GOSHEN COUNTY IS CANCELLED...

THE STORM HAS DECREASED IN INTENSITY AND IS NO LONGER SEVERE.
THEREFORE...THE WARNING HAS BEEN CANCELLED.

ALTHOUGH THE WARNING HAS BEEN CANCELLED...THUNDERSTORMS WITH SMALL
HAIL...WIND GUSTS TO 40 MPH AND FREQUENT LIGHTNING WILL STILL BE
POSSIBLE.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 700 PM FRIDAY EVENING FOR
CENTRAL NEBRASKA AND SOUTHEASTERN WYOMING.

REPORT SEVERE WEATHER TO THE NATIONAL WEATHER SERVICE OFFICE IN
CHEYENNE AT 1-800-269-6220.

LAT...LON 4166 10445 4198 10461 4199 10459 4202 10425
      4165 10431
TIME...MOT...LOC 0000Z 165DEG 34KT 4183 10441

$$

SOWKO

The office that day

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

Issued	Product	Office	Counties	Lasted
May 22, 7:58 PM MDT	Tornado Warning	CYS	Laramie	32 min
May 22, 8:28 PM MDT	Tornado Warning	CYS	Laramie	32 min
May 22, 9:06 PM MDT	Severe Thunderstorm Warning	CYS	Goshen, Laramie	39 min
May 22, 10:56 PM MDT	Areal Flood Warning	CYS	Platte	18 hr
May 23, 1:28 PM MDT	Severe Thunderstorm Warning	CYS	Laramie	47 min
May 23, 2:00 PM MDT	Tornado Warning	CYS	Laramie	45 min
May 23, 2:34 PM MDT	Severe Thunderstorm Warning	CYS	Laramie	26 min
May 23, 2:39 PM MDT	Severe Thunderstorm Warning	CYS	Laramie	37 min
May 23, 3:14 PM MDT	Tornado Warning	CYS	Laramie	28 min
May 23, 3:22 PM MDT	Severe Thunderstorm Warning	CYS	Platte	53 min
May 23, 3:40 PM MDT	Tornado Warning	CYS	Laramie, Platte	50 min
May 23, 4:05 PM MDT	Tornado Warning	CYS	Platte	25 min
May 23, 4:23 PM MDT	Tornado Warning	CYS	Laramie	52 min
May 23, 4:25 PM MDT	Severe Thunderstorm Warning	CYS	Platte	65 min
May 23, 4:30 PM MDT	Severe Thunderstorm Warning	CYS	Platte	45 min
May 23, 5:07 PM MDT	Severe Thunderstorm Warning	CYS	Niobrara	53 min
May 23, 5:10 PM MDT	Areal Flood Warning	CYS	Converse, Goshen, Niobrara, Platte	2 hr
May 23, 5:21 PM MDT	Tornado Warning	CYS	Platte	24 min
May 23, 5:45 PM MDT	Severe Thunderstorm Warning	CYS	Platte	13 min
May 23, 5:53 PM MDT	Tornado Warning	CYS	Platte	13 min

Nearby

Tornado Warnings in Wyoming, 2008 Every tornado warning in 2008 Tornadoes in 2008

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.