Alert archive / Wyoming / Tornado Warnings in 2003

Tornado Warning 1, NWS Riverton, WY

June 16, 2003Fremont County, Natrona County, Wyoming

NWS Riverton, WY issued this tornado warning at Jun 16, 2003, 4:54 PM MDT for Fremont County, Natrona County, Wyoming. It was in force for 26 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: Jun 16, 2003, 4:54 PM MDT (22:54 UTC)
Expired: Jun 16, 2003, 5:20 PM MDT
In force: 26 min
Issued by: NWS Riverton, WY
Area: Counties, with a storm outline in the text

Counties Fremont County, WY, Natrona County, WY

The radar

The Riverton/Lander radar (KRIW), 79 km from the middle of the area, began a volume at 22:56 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

Riverton, WY (KRIW), launched 12:00Z, 10.9 hours before the alert went out and 73 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: 14 J/kg
Mixed-layer CIN: -317 J/kg
Mixed-layer LCL: 1479 m above ground
0-6 km bulk shear: 27 kt
0-1 km storm-relative helicity: -7 m²/s²
0-3 km storm-relative helicity: 143 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.

001 
WFUS55 KRIW 162254
TORRIW
WYC013-025-162320-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE RIVERTON WY
450 PM MDT MON JUN 16 2003

THE NATIONAL WEATHER SERVICE IN RIVERTON HAS ISSUED A

* TORNADO WARNING FOR...
  EXTREME EAST CENTRAL FREMONT COUNTY IN CENTRAL WYOMING
  WEST CENTRAL NATRONA COUNTY IN CENTRAL WYOMING

* UNTIL 520 PM MDT

* AT 450 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  THUNDERSTORM WITH A POSSIBLE TORNADO OVER EXTREME EAST CENTRAL
  FREMONT COUNTY...OR ABOUT 46 MILES EAST OF RIVERTON...MOVING NORTH
  AT 15 MPH.

* THE TORNADO IS EXPECTED TO BE...
  OVER RURAL EASTERN FREMONT COUNTY AND RURAL WESTERN NATRONA   
  COUNTY...NEAR U.S. HIGHWAY 26 BETWEEN MONETA AND HILAND IN CENTRAL 
  WYOMING AROUND 500 PM MDT.
 

THIS TORNADO WARNING REPLACES THE SEVERE THUNDERSTORM WARNING
PREVIOUSLY ISSUED FOR THE WARNED AREA.

IF YOU ARE CAUGHT OUTSIDE...SEEK SHELTER IN A NEARBY STURDY BUILDING.
AS A LAST RESORT...SEEK REFUGE IN A CULVERT...DITCH OR LOW SPOT AND
COVER YOUR HEAD WITH YOUR HANDS. BEWARE OF THE THREAT OF RISING
WATER.

THIS IS A DANGEROUS STORM ACT QUICKLY. IF YOU ARE IN THE PATH OF
THIS TORNADO MOVE TO THE LOWEST FLOOR OF A STURDY BUILDING.

REPORT SEVERE WEATHER TO THE NATIONAL WEATHER SERVICE OFFICE IN
RIVERTON AT 1-800-211-1448.

LAT...LON 4292 10760 4294 10733 4317 10736 4318 10763

$$

KNUTSVIG

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 16, 3:19 PM MDT	Severe Thunderstorm Warning	RIW	Fremont	41 min
Jun 16, 3:39 PM MDT	Severe Thunderstorm Warning	RIW	Fremont, Hot Springs, Natrona, Washakie	36 min
Jun 16, 3:53 PM MDT	Flash Flood Warning	RIW	Fremont, Natrona	3 hr
Jun 16, 4:06 PM MDT	Flash Flood Warning	RIW	Washakie	3 hr
Jun 16, 4:11 PM MDT	Severe Thunderstorm Warning	RIW	Fremont, Hot Springs	49 min
Jun 16, 4:37 PM MDT	Flash Flood Warning	RIW	Hot Springs	2 hr
Jun 16, 4:37 PM MDT	Severe Thunderstorm Warning	RIW	Fremont, Natrona	38 min
Jun 16, 5:20 PM MDT	Severe Thunderstorm Warning	RIW	Fremont, Natrona	40 min
Jun 16, 5:57 PM MDT	Severe Thunderstorm Warning	RIW	Natrona	48 min

Nearby

Tornado Warnings in Wyoming, 2003 Every tornado warning in 2003 Tornadoes in 2003

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.