Alert archive / Wyoming / Tornado Warnings in 2007

Tornado Warning 8, NWS Cheyenne, WY

July 22, 2007Converse County, Wyoming

NWS Cheyenne, WY issued this tornado warning at Jul 22, 2007, 7:47 PM MDT for Converse 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: Jul 22, 2007, 7:47 PM MDT (01:47 UTC)
Expired: Jul 22, 2007, 8:06 PM MDT
In force: 19 min
Issued by: NWS Cheyenne, WY
Area: Counties, with a storm outline in the text

County Converse County, WY

The radar

The Rapid City radar (KUDX), 222 km from the middle of the area, began a volume at 01:50 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 nearest sounding before it

Rapid City, SD (KUNR), launched 00:00Z, 1.8 hours before the alert went out and 216 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: 4224 m above ground
0-6 km bulk shear: 14 kt
0-1 km storm-relative helicity: 16 m²/s²
0-3 km storm-relative helicity: -39 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 230148
TORCYS
WYC009-230215-
/O.NEW.KCYS.TO.W.0008.070723T0147Z-070723T0215Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE CHEYENNE WY
747 PM MDT SUN JUL 22 2007

THE NATIONAL WEATHER SERVICE IN CHEYENNE HAS ISSUED A

* TORNADO WARNING FOR...
  NORTHERN CONVERSE COUNTY IN EAST CENTRAL WYOMING...

* UNTIL 815 PM MDT

* AT 744 PM MDT...THE PUBLIC REPORTED DAMAGE FROM A POSSIBLE TORNADO
  10 MILES TO THE NORTH OF BILL...OR ABOUT 40 MILES NORTH OF DOUGLAS.
  THE STORM PRODUCING THE POSSIBLE TORNADO WAS NEARLY STATIONARY.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO HARDY
  RANCH AIR STRIP AND BILL

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 4311 10497 4348 10496 4346 10585 4314 10587

$$
WEILAND

1 follow-up statement

000 
WWUS55 KCYS 230206
SVSCYS

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHEYENNE WY
805 PM MDT SUN JUL 22 2007

WYC009-230215-
/O.CAN.KCYS.TO.W.0008.000000T0000Z-070723T0215Z/
CONVERSE WY-
805 PM MDT SUN JUL 22 2007

...THE TORNADO WARNING FOR NORTHERN CONVERSE COUNTY IS CANCELLED...

THE STORM HAS DECREASED IN INTENSITY AND IS NO LONGER SEVERE OR
CAPABLE OF PRODUCING A TORNADO. THEREFORE...THE WARNING HAS BEEN 
CANCELLED.  

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

LAT...LON 4311 10497 4348 10496 4346 10585 4314 10587

$$

WEILAND

Nearby

Tornado Warnings in Wyoming, 2007 Every tornado warning in 2007 Tornadoes in 2007

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.