Alert archive / Wyoming / Tornado Watches in 1997

Tornado Watch 378

June 2, 19979 counties in Wyoming

The Storm Prediction Center issued this tornado watch at Jun 2, 1997, 1:30 PM MDT for 9 counties in Wyoming. It was in force for 6 hr.

The area

The outline as issued.

The facts

Issued: Jun 2, 1997, 1:30 PM MDT (19:30 UTC)
Expired: Jun 2, 1997, 7:00 PM MDT
In force: 6 hr
Issued by: the Storm Prediction Center

Counties Albany County, WY, Campbell County, WY, Converse County, WY, Goshen County, WY, Johnson County, WY, Laramie County, WY, Niobrara County, WY, Platte County, WY, Weston County, WY

The radar

The Cheyenne radar (KCYS), 200 km from the middle of the area, began a volume at 19:39 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.

Warnings issued inside it

3 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.

Issued	Product	Office	Counties	Lasted
Jun 2, 2:45 PM MDT	Tornado Warning	CYS	Platte	20 min
Jun 2, 2:47 PM MDT	Severe Thunderstorm Warning	CYS	Niobrara	48 min
Jun 2, 4:00 PM MDT	Severe Thunderstorm Warning	CYS	Goshen	35 min

The nearest sounding before it

Rapid City, SD (KUNR), launched 12:00Z, 7.5 hours before the alert went out and 216 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: 2 J/kg
Mixed-layer CIN: -148 J/kg
Mixed-layer LCL: 1251 m above ground
0-6 km bulk shear: 26 kt
0-1 km storm-relative helicity: -18 m²/s²
0-3 km storm-relative helicity: -17 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.

287 
WWUS9 KMKC 021855 COR
SEL8  
MKC WW 021855 COR
WYZ000-030100-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 378
STORM PREDICTION CENTER NORMAN OK
1255 PM MDT MON JUN 2 1997

THE STORM PREDICTION CENTER HAS ISSUED A
TORNADO WATCH FOR PORTIONS OF

EASTERN WYOMING

EFFECTIVE THIS MONDAY AFTERNOON AND EVENING FROM 130 PM UNTIL 700
PM MDT.

TORNADOES...HAIL TO 1 3/4 INCHES IN DIAMETER...THUNDERSTORM WIND
GUSTS TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE
AREAS.

THE TORNADO WATCH AREA IS ALONG AND 70 STATUTE MILES EAST AND WEST
OF A LINE FROM 100 MILES NORTH OF DOUGLAS WYOMING TO 25 MILES
SOUTHEAST OF LARAMIE WYOMING.

REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR
TORNADOES AND SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH AREA. 
PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR THREATENING
WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS AND POSSIBLE
WARNINGS.

OTHER WATCH INFORMATION...  CONTINUE...WW 377...

DISCUSSION...UPSLOPE FLOW SUPPORTING INCREASING THUNDERSTORM
ACTIVITY OVER WYOMING WHERE AIR MASS RATHER UNSTABLE WITH 1500 TO
2500 J/KG CAPES. APPROACHING UPPER VORT AXIS AND ASSOCIATED 35 KT
MID LEVEL SPEED MAX WILL RESULT IN A FEW TORNADIC SUPERCELLS ALONG
WITH LARGE HAIL AND DAMAGING DOWNBURSTS. 


AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 1 3/4 INCHES.  EXTREME TURBULENCE AND SURFACE
WIND GUSTS TO 60 KNOTS.  A FEW CUMULONIMBI WITH MAXIMUM TOPS TO
450.  MEAN STORM MOTION VECTOR 26035.


...ROGASH

441,1035 410,1035 410,1064 441,1064

Nearby

Tornado Watches in Wyoming, 1997 Every tornado watch 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.