Alert archive / Wyoming / Tornado Warnings in 2002

Tornado Warning 7, NWS Cheyenne, WY

August 27, 2002Albany County, Wyoming

NWS Cheyenne, WY issued this tornado warning at Aug 27, 2002, 7:41 PM MDT for Albany County, Wyoming. It was in force for 34 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: Aug 27, 2002, 7:41 PM MDT (01:41 UTC)
Expired: Aug 27, 2002, 8:15 PM MDT
In force: 34 min
Issued by: NWS Cheyenne, WY
Area: Counties, with a storm outline in the text

County Albany County, WY

The radar

The Cheyenne radar (KCYS), 102 km from the middle of the area, began a volume at 01:42 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
Aug 27, 2:40 PM MDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Riverton, WY (KRIW), launched 00:00Z, 1.7 hours before the alert went out and 264 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: 331 J/kg
Mixed-layer CIN: -2 J/kg
Mixed-layer LCL: 1661 m above ground
0-6 km bulk shear: 37 kt
0-1 km storm-relative helicity: -15 m²/s²
0-3 km storm-relative helicity: 30 m²/s²
Significant tornado parameter: -0.0
Supercell composite: -0.1

Open this sounding in Storm Lab

The text

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

788 
WFUS55 KCYS 280141
TORCYS
WYC001-280215-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE CHEYENNE WY
740 PM MDT TUE AUG 27 2002

THE NATIONAL WEATHER SERVICE IN CHEYENNE HAS ISSUED A

* TORNADO WARNING FOR...
  CENTRAL ALBANY COUNTY IN SOUTHEAST WYOMING

* UNTIL 815 PM MDT

* AT 732 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM WITH A POSSIBLE TORNADO 13 MILES SOUTHEAST OF
  ROCK RIVER...OR ABOUT 23 MILES NORTHWEST OF LARAMIE...MOVING
  SOUTHEAST AT 20 MPH.

THE SAFEST PLACE TO BE DURING A TORNADO IS IN A BASEMENT. GET UNDER A
WORKBENCH OR OTHER PIECE OF STURDY FURNITURE. IF NO BASEMENT IS
AVAILABLE...SEEK SHELTER ON THE LOWEST FLOOR OF THE BUILDING IN AN
INTERIOR HALLWAY OR ROOM SUCH AS A CLOSET. USE BLANKETS OR PILLOWS TO
COVER YOUR BODY AND ALWAYS STAY AWAY FROM WINDOWS.

THIS TORNADO WARNING REPLACES THE SEVERE THUNDERSTORM WARNING THAT
WAS IN EFFECT FOR THE SAME AREA. GO TO A BASEMENT OR SMALL INTERIOR
ROOM ON THE LOWEST FLOOR

REPORT SEVERE WEATHER TO THE NEAREST LAW ENFORCEMENT AGENCY. THEY
WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 800 PM MDT
TUESDAY EVENING FOR SOUTHEAST WYOMING.

LAT...LON 4196 10578 4168 10605 4138 10574 4161 10547

COX

WCJIN-WYSE

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 27, 7:05 PM MDT	Severe Thunderstorm Warning	CYS	Albany	40 min
Aug 27, 8:13 PM MDT	Tornado Warning	CYS	Albany	32 min
Aug 27, 8:45 PM MDT	Tornado Warning	CYS	Albany	45 min
Aug 27, 9:30 PM MDT	Severe Thunderstorm Warning	CYS	Albany, Laramie	45 min
Aug 28, 5:19 PM MDT	Severe Thunderstorm Warning	CYS	Laramie	41 min

Nearby

Tornado Warnings in Wyoming, 2002 Every tornado warning in 2002 Tornadoes in 2002

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.