Alert archive / Wyoming / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 29, NWS Cheyenne, WY

June 6, 1997Carbon County, Wyoming

NWS Cheyenne, WY issued this severe thunderstorm warning at Jun 6, 1997, 2:34 PM MDT for Carbon County, Wyoming. It was in force for 41 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: Jun 6, 1997, 2:34 PM MDT (20:34 UTC)
Expired: Jun 6, 1997, 3:15 PM MDT
In force: 41 min
Issued by: NWS Cheyenne, WY
Area: Whole counties

County Carbon County, WY

The radar

The Cheyenne radar (KCYS), 187 km from the middle of the area, began a volume at 20:35 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, 8.6 hours before the alert went out and 195 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: 879 J/kg
Mixed-layer CIN: -115 J/kg
Mixed-layer LCL: 1139 m above ground
0-6 km bulk shear: 24 kt
0-1 km storm-relative helicity: 5 m²/s²
0-3 km storm-relative helicity: 99 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.3

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KCYS 062035
SVRCYS
WYC007-062115-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE CHEYENNE WY
234 PM MDT FRI JUN 6 1997

* SEVERE THUNDERSTORM WARNING FOR
  CENTRAL AND NORTH CENTRAL CARBON COUNTY IN SOUTH CENTRAL WYOMING

* UNTIL 315 PM MDT

* THIS STORM IS EXPECTED TO REMAIN IN RURAL AREAS....BUT WILL
  BE IN THE SEMINOLE RESERVOIR VICINITY.

* AT 231 PM MDT...A SEVERE THUNDERSTORM WAS INDICATED BY DOPPLER
  RADAR AND SPOTTER REPORTS 16 MILES NORTHEAST OF RAWLINS OR 5 TO 10
  MILES NORTH NORTHWEST OF WALCOTT MOVING NORTH AT 15 MPH.

THIS STORM HAS PRODUCED A COUPLE OF BRIEF FUNNEL CLOUDS...AND WILL
LIKELY CONTINUE TO DO SO.

IF YOU ARE DRIVING AND ENCOUNT<ER HEAVY RAIN OR HAIL...SLOW DOWN OR
PULL TO THE SIDE OF THE ROAD UNTIL THE STORM PASSES.

WCJIN-WYSE

JAD

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

In the hours before

Special weather statement, Jun 6, 9:56 AM MDT, 4 hours 38 minutes before

WYZ059>070-NEZ001>003-019>021-054-055-070000-

SEVERE WEATHER OUTLOOK
NATIONAL WEATHER SERVICE CHEYENNE WY
1000 AM MDT FRI JUN 6 1997

THE SEVERE WEATHER POTENTIAL IN THE CHEYENNE NWS COUNTY WARNING AREA
IS LOW TODAY.

SPOTTER ACTIVATION WILL NOT LIKELY BE REQUIRED.

DISCUSSION...A COLD FRONTAL SYSTEM IS SITUATED IN CENTRAL WYOMING AND
WILL MOVE VERY SLOWLY ACROSS THE STATE.  THIS FRONT MAY TRIGGER A FEW
AFTERNOON AND EVENING THUNDERSTORMS. THESEp STORMS ARE NOT EXPECTED TO
BE SEVERE.

WCJIN-WYSE-WYNE

JLA

Nearby

Severe Thunderstorm Warnings in Wyoming, 1997 Every severe thunderstorm warning 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.