Alert archive / Wyoming / Tornado Warnings in 2001

Tornado Warning 6, NWS Cheyenne, WY

June 30, 2001Laramie County, Wyoming

NWS Cheyenne, WY issued this tornado warning at Jun 30, 2001, 2:43 PM MDT for Laramie County, Wyoming. It was in force for 32 min. 2 reports came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued: Jun 30, 2001, 2:43 PM MDT (20:43 UTC)
Expired: Jun 30, 2001, 3:15 PM MDT
In force: 32 min
Issued by: NWS Cheyenne, WY
Area: Whole counties

County Laramie County, WY

The radar

The Cheyenne radar (KCYS), 20 km from the middle of the area, began a volume at 20:43 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.

What was reported inside it

Time	Report	Where	Remark
Jun 30, 3:00 PM MDT	Hail 1.75	Burns, WY
Jun 30, 3:20 PM MDT	Hail 1.5	Carpenter, WY

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.

The nearest sounding before it

Denver, CO (KDNR), launched 12:00Z, 8.7 hours before the alert went out and 202 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: 3 J/kg
Mixed-layer CIN: -488 J/kg
Mixed-layer LCL: 2277 m above ground
0-6 km bulk shear: 23 kt
0-1 km storm-relative helicity: -1 m²/s²
0-3 km storm-relative helicity: 66 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 302044
TORCYS
WYC021-302115-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE CHEYENNE WY
243 PM MDT SAT JUN 30 2001

THE NATIONAL WEATHER SERVICE IN CHEYENNE HAS ISSUED A

* TORNADO WARNING FOR...
  SOUTHEASTERN LARAMIE COUNTY IN SOUTHEAST WYOMING

* UNTIL 315 PM MDT

* AT 238 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED   
  A SEVERE THUNDERSTORM WITH A TORNADO 7 MILES NORTHWEST OF
  CARPENTER...OR ABOUT 19 MILES EAST OF CHEYENNE...MOVING 
  NORTHEAST   AT 10 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BURNS

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.

LAT...LON 4112 10458 4099 10439 4102 1041A3 4136 10414

WCJIN-WYSE
DAUGHERTY

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 29, 6:27 PM MDT	Severe Thunderstorm Warning	CYS	Laramie	63 min
Jun 29, 7:32 PM MDT	Severe Thunderstorm Warning	CYS	Laramie	43 min
Jun 29, 8:14 PM MDT	Severe Thunderstorm Warning	CYS	Laramie	61 min
Jun 29, 9:19 PM MDT	Severe Thunderstorm Warning	CYS	Goshen	56 min
Jun 29, 9:47 PM MDT	Severe Thunderstorm Warning	CYS	Platte	43 min
Jun 29, 10:44 PM MDT	Severe Thunderstorm Warning	CYS	Platte	46 min
Jun 30, 3:14 PM MDT	Severe Thunderstorm Warning	CYS	Laramie	46 min

Nearby

Tornado Warnings in Wyoming, 2001 Every tornado warning in 2001 Tornadoes in 2001

Sources

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