Alert archive / Wyoming / Tornado Warnings in 1997

Tornado Warning 5, NWS Riverton, WY

July 19, 1997Sublette County, Wyoming

NWS Riverton, WY issued this tornado warning at Jul 19, 1997, 2:44 PM MDT for Sublette 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 counties it named.

The facts

Issued: Jul 19, 1997, 2:44 PM MDT (20:44 UTC)
Expired: Jul 19, 1997, 3:10 PM MDT
In force: 26 min
Issued by: NWS Riverton, WY
Area: Whole counties

County Sublette County, WY

The radar

The Riverton/Lander radar (KRIW), 122 km from the middle of the area, began a volume at 20:46 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, 8.7 hours before the alert went out and 128 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: 160 J/kg
Mixed-layer CIN: -188 J/kg
Mixed-layer LCL: 1124 m above ground
0-6 km bulk shear: 43 kt
0-1 km storm-relative helicity: 69 m²/s²
0-3 km storm-relative helicity: 84 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.

000 
TTAA00 KRIW 192045 RRA
TORRIW
WYC035-192110-

BULLETIN - EAS ACTIVATION
TORNADO WARNING
NATIONAL WEATHER SERVICE RIVERTON WY
244 PM MDT SAT JUL 19 1997

* TORNADO WARNING FOR
  SUBLETTE COUNTY - WEST CENTRAL WYOMING

* UNTIL 310 PM MDT
 
* SOME LOCATIONS AFFECTED
  BIG PINEY
  MARBLETON
  PINEDALE

* AT 230 LOCAL LAW ENFORCEMENT REPORTED SEVERAL TORNADOES AND FUNNEL
CLOUDS IN THE VICINITY OF MARBLETON AND BIG PINEY AND ALSO NEAR
PINEDALE. THE PARENT THUNDERSTORMS WERE MOVING NORTHEAST AROUND 10 MPH.

* THE STORMS WILL AFFECT PINEDALE...MARBLETON...AND BIG PINEY BETWEEN
245 AND 315 PM.

IF YOU ARE NEAR THESE DANGEROUS STORMS, TAKE COVER IMMEDIATELY IN THE
LOWEST FLOOR AND INNERMOST ROOM OF A BUILDING.
 
IF YOU ARE IN THE PATH OF A TORNADO...THE SAFEST PLACE IN A HOME OR
BUSINESS IS AN INTERIOR ROOM ON THE LOWEST FLOOR POSSIBLE.  AVOID
WINDOWS.

WCJIN-WYNW
SHEETS

&

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 19, 12:33 PM MDT	Severe Thunderstorm Warning	RIW	Fremont	42 min
Jul 19, 2:31 PM MDT	Severe Thunderstorm Warning	RIW	Fremont, Sublette, Teton	59 min
Jul 19, 2:31 PM MDT	Severe Thunderstorm Warning	RIW	Hot Springs, Park	59 min
Jul 19, 3:39 PM MDT	Severe Thunderstorm Warning	RIW	Big Horn, Park	91 min
Jul 19, 4:56 PM MDT	Severe Thunderstorm Warning	RIW	Big Horn	89 min

Nearby

Tornado Warnings in Wyoming, 1997 Every tornado warning in 1997 Tornadoes in 1997

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.