Alert archive / Wyoming / Tornado Warnings in 2005

Tornado Warning 4, NWS Riverton, WY

June 1, 2005Big Horn County, Washakie County, Wyoming

NWS Riverton, WY issued this tornado warning at Jun 1, 2005, 1:54 PM MDT for Big Horn County, Washakie County, Wyoming. It was in force for 51 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 1, 2005, 1:54 PM MDT (19:54 UTC)
Expired: Jun 1, 2005, 2:45 PM MDT
In force: 51 min
Issued by: NWS Riverton, WY
Area: Counties, with a storm outline in the text

Counties Big Horn County, WY, Washakie County, WY

The radar

The Riverton/Lander radar (KRIW), 135 km from the middle of the area, began a volume at 19:56 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 watch it was issued in

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

Issued	Product	Office	Lasted
Jun 1, 1:40 PM MDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Riverton, WY (KRIW), launched 12:00Z, 7.9 hours before the alert went out and 133 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: 1659 m above ground
0-6 km bulk shear: 47 kt
0-1 km storm-relative helicity: 77 m²/s²
0-3 km storm-relative helicity: 193 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 KRIW 011954
TORRIW
WYC003-043-012045-
/O.NEW.KRIW.TO.W.0004.050601T1954Z-050601T2045Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE RIVERTON WY
154 PM MDT WED JUN 1 2005

THE NATIONAL WEATHER SERVICE IN RIVERTON HAS ISSUED A

* TORNADO WARNING FOR...
  SOUTHERN BIG HORN COUNTY IN NORTH CENTRAL WYOMING
  NORTH CENTRAL WASHAKIE COUNTY IN NORTH CENTRAL WYOMING

* UNTIL 245 PM MDT

* AT 151 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO 11 MILES
  SOUTHWEST OF HWY 16/20/789 MILE MARKER 190...OR ABOUT 16 MILES
  SOUTHWEST OF BASIN...MOVING EAST AT 30 MPH.

* THE TORNADO EXPECTED TO BE NEAR...
  HWY 16/20/789 MILE MARKER 190 BY 210 PM MDT
  MANDERSON BY 215 PM MDT
  HWY 16/20/789 MILE MARKER 180 BY 220 PM MDT
  STATE HWY 31 MILE MARKER 10 BY 230 PM MDT
  STATE HWY 31 MILE MARKER 20 BY 245 PM MDT

MOVE INTO A BASEMENT OR 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
RIVERTON AT 1-800-211-1448.

LAT...LON 4432 10837 4409 10833 4405 10752 4442 10758

$$

MCDONALD

2 follow-up statements

000 
WWUS55 KRIW 012010
SVSRIW

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE RIVERTON WY
210 PM MDT WED JUN 1 2005

WYC003-043-012045-
/O.CON.KRIW.TO.W.0004.000000T0000Z-050601T2045Z/
WASHAKIE WY-BIG HORN WY-
210 PM MDT WED JUN 1 2005

...A TORNADO WARNING CONTINUES FOR SOUTH CENTRAL BIG HORN AND NORTH
CENTRAL WASHAKIE COUNTIES UNTIL 245 PM MDT...

AT 206 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A TORNADO.  THIS TORNADO WAS LOCATED 7 MILES SOUTHWEST OF
HWY 16/20/789 MILE MARKER 190...OR ABOUT 12 MILES SOUTH OF BASIN...
MOVING EAST AT 20 MPH.

THE TORNADO WILL BE NEAR...
  HWY 16/20/789 MILE MARKER 190 BY 220 PM MDT
  MANDERSON BY 230 PM MDT
  HWY 16/20/789 MILE MARKER 180 BY 235 PM MDT
  STATE HWY 31 MILE MARKER 10 BY 245 PM MDT

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

IN ADDITION TO THE THREAT OF A TORNADO...DAMAGING HAIL AND WIND CAN
BE EXPECTED. GO TO A SAFE PLACE NOW

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

LAT...LON 4434 10823 4409 10819 4407 10752 4446 10758

$$

MCDONALD

000 
WWUS55 KRIW 012044
SVSRIW

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE RIVERTON WY
244 PM MDT WED JUN 1 2005

WYC003-043-012054-
/O.EXP.KRIW.TO.W.0004.000000T0000Z-050601T2045Z/
WASHAKIE WY-BIG HORN WY-
244 PM MDT WED JUN 1 2005

...THE TORNADO WARNING FOR SOUTH CENTRAL BIG HORN AND NORTH CENTRAL
WASHAKIE COUNTIES WILL EXPIRE AT 245 PM MDT...

THE STORM HAS DECREASED IN INTENSITY AND IS NO LONGER SEVERE. 
THEREFORE...THE WARNING WILL BE ALLOWED TO EXPIRE.  PEA SIZE HAIL IS 
STILL POSSIBLE ALONG WITH HEAVY DOWNPOURS.

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

LAT...LON 4434 10823 4409 10819 4407 10752 4446 10758

$$

MCDONALD

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 1, 12:57 PM MDT	Severe Thunderstorm Warning	RIW	Big Horn, Park	63 min
Jun 1, 1:31 PM MDT	Severe Thunderstorm Warning	RIW	Big Horn	46 min
Jun 1, 1:39 PM MDT	Tornado Warning	RIW	Big Horn	28 min
Jun 1, 1:45 PM MDT	Tornado Warning	RIW	Big Horn	45 min

Nearby

Tornado Warnings in Wyoming, 2005 Every tornado warning in 2005 Tornadoes in 2005

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.