Alert archive / Wyoming / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 77, NWS Cheyenne, WY

June 22, 1998Goshen County, Wyoming

NWS Cheyenne, WY issued this severe thunderstorm warning at Jun 22, 1998, 8:35 PM MDT for Goshen County, Wyoming. It was in force for 40 min. 1 report came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued
Jun 22, 1998, 8:35 PM MDT (02:35 UTC)
Expired
Jun 22, 1998, 9:15 PM MDT
In force
40 min
Issued by
NWS Cheyenne, WY
Area
Whole counties

County Goshen County, WY

The radar

The Cheyenne radar (KCYS), 111 km from the middle of the area, began a volume at 02:36 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.

What was reported inside it

TimeReportWhereRemark
Jun 22, 8:50 PM MDTHail 0.75Torrington, WY

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.

The watch it was issued in

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

IssuedProductOfficeLasted
Jun 22, 7:45 PM MDTSevere Thunderstorm WatchSPC6 hr

The nearest sounding before it

Rapid City, SD (KUNR), launched 00:00Z, 2.6 hours before the alert went out and 251 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-pSkew-T log-p diagram, Rapid City, SD at 00:00Z on 1998-06-23Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 610 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Rapid City, SD at 00:00Z on 1998-06-23The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 77 square meters per square second.1939587897117Sfc1 km3 km6 km9 kmRMLM
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
610 J/kg
Mixed-layer CIN
-45 J/kg
Mixed-layer LCL
2011 m above ground
0-6 km bulk shear
34 kt
0-1 km storm-relative helicity
77 m²/s²
0-3 km storm-relative helicity
575 m²/s²
Significant tornado parameter
0.0
Supercell composite
18.5

Open this sounding in Storm Lab

The text

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

975 
WUUS1 KCYS 230236 RRA
SVRCYS
WYC015-230315-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE CHEYENNE WY
835 PM MDT MON JUN 22 1998

THE NATIONAL WEATHER SERVICE IN CHEYENNE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  EAST CENTRAL GOSHEN COUNTY IN SOUTHEASTERN WYOMING

* UNTIL 915 PM MDT

* AT 833 PM...SPOTTERS INDICATED A SEVERE THUNDERSTORM 3 MILES WEST
  AND SOUTHWEST OF TORRINGTON... MOVING EAST AT 15 MPH.
  HAIL UP TO 3/4 OF AN INCH IN DIAMETER WAS REPORTED AT 833 PM
  NEAR LINGLE ABOUT 10 MILES NORTHWEST OF TORRINGTON.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  TORRINGTON AT THIS TIME

THIS IS A DANGEROUS STORM STAY INDOORS AWAY FROM WINDOWS.

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 22, 5:57 PM MDT, 2 hours 38 minutes before
WYZ059-060-064-066>070-230115-

SPECIAL WEATHER STATEMENT...CORRECTION TO TIMES
NATIONAL WEATHER SERVICE CHEYENNE WY
557 PM MDT MON JUN 22 1998

...A TORNADO WATCH CONTINUES UNTIL 8 PM FOR MUCH OF EASTERN WYOMING...

RADAR AT 545 PM SHOWED A LINE OF THUNDERSTORMS FROM ABOUT 25 MILES
NORTH OF TORRINGTON TO ABOUT 25 MILES SOUTHWEST OF WHEATLAND.
NONE OF THESE STORMS HAD PRODUCED ANY SEVERE WEATHER THROUGH 545 PM.

THE ONLY SIGNIFICANT REPORT SO FAR HAS BEEN PEA SIZE HAIL AND SOME
ROTATION IN THE CLOUDS IN THE LINGLE AREA BETWEEN 530 TO 545 PM...
SOME 10 TO 15 MILES NORTHWEST OF TORRINGTON.

OTHER STORMS IN EAST CENTRAL WYOMING HAVE MOVED INTO THE NORTHERN
PARTS OF CONVERSE AND NIOBRARA COUNTIES.  ONLY ISOLATED WEAK STORMS
WERE OVER FAR SOUTHEAST WYOMING IN THE LARAMIE AND CHEYENNE AREAS.

THE POTENTIAL FOR STRONG POSSIBLY SEVERE STORMS CONTINUES UNTIL 8 PM.
PLATTE AND GOSHEN COUNTIES REMAIN THE MAIN AREA OF CONCERN AT THIS
TIME.

WCJIN-WYSE-WYNE

JAD
Special weather statement, Jun 22, 6:02 PM MDT, 2 hours 33 minutes before
NEZ001>003-019>021-054-055-230115-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHEYENNE WY
602 PM MDT MON JUN 22 1998

...A TORNADO WATCH REMAINS IN EFFECT UNTIL 8 PM...

AT 555 PM...RADAR SHOWED A BAND OF STORMS MOVING INTO THE WESTERN
PART OF SIOUX COUNTY.  NONE OF THE STORMS APPEARED TO BE SEVERE AT
THIS TIME.  A FEW OTHER WEAK STORMS WERE MOVING INTO WESTERN BANNER
COUNTY.  ALL STORMS WERE MOVING NORTHEAST AROUND 15 TO 20 MPH.

THE POTENTIAL FOR STRONG POSSIBLY SEVERE STORMS CONTINUES IN THE
PANHANDLE UNTIL 8 PM.  STAY TUNED TO THIS STATION FOR THE LATEST
INFORMATION.

JAD
Special weather statement, Jun 22, 6:02 PM MDT, 2 hours 33 minutes before
NEZ001>003-019>021-054-055-230115-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHEYENNE WY
602 PM MDT MON JUN 22 1998

...A TORNADO WATCH REMAINS IN EFFECT UNTIL 8 PM...

AT 555 PM...RADAR SHOWED A BAND OF STORMS MOVING INTO THE WESTERN
PART OF SIOUX COUNTY.  NONE OF THE STORMS APPEARED TO BE SEVERE AT
THIS TIME.  A FEW OTHER WEAK STORMS WERE MOVING INTO WESTERN BANNER
COUNTY.  ALL STORMS WERE MOVING NORTHEAST AROUND 15 TO 20 MPH.

THE POTENTIAL FOR STRONG POSSIBLY SEVERE STORMS CONTINUES IN THE
PANHANDLE UNTIL 8 PM.  STAY TUNED TO THIS STATION FOR THE LATEST
INFORMATION.

JAD
Special weather statement, Jun 22, 8:16 PM MDT, 19 minutes before
WYZ059-064>067-069-070-230245-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHEYENNE WY
816 PM MDT MON JUN 22 1998

..THE TORNADO WATCH FOR MUCH OF EASTERN WYOMING EXPIRED AT 8 PM...

STORMS HAVE MOVED NORTH AND EAST OF THE WATCH AREA AT 8 PM...SO THE
TORNADO WATCH HAS BEEN ALLOWED TO END.  ONLY A FEW STORMS POPPED UP
FROM LARAMIE AND CHEYENNE NORTH INTO THE DOUGLAS AREA DURING THE
AFTERNOON AND EARLY EVENING.

ABOUT THE ONLY SIGNIFICANT WEATHER REPORTED WAS SOME MARBLE SIZE HAIL
IN THE WHEATLAND AREA AROUND 645 TO 700 PM.

WCJIN-WYSE

JAD
Special weather statement, Jun 22, 8:16 PM MDT, 19 minutes before
WYZ059-064>067-069-070-230245-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHEYENNE WY
816 PM MDT MON JUN 22 1998

..THE TORNADO WATCH FOR MUCH OF EASTERN WYOMING EXPIRED AT 8 PM...

STORMS HAVE MOVED NORTH AND EAST OF THE WATCH AREA AT 8 PM...SO THE
TORNADO WATCH HAS BEEN ALLOWED TO END.  ONLY A FEW STORMS POPPED UP
FROM LARAMIE AND CHEYENNE NORTH INTO THE DOUGLAS AREA DURING THE
AFTERNOON AND EARLY EVENING.

ABOUT THE ONLY SIGNIFICANT WEATHER REPORTED WAS SOME MARBLE SIZE HAIL
IN THE WHEATLAND AREA AROUND 645 TO 700 PM.

WCJIN-WYSE

JAD
Special weather statement, Jun 22, 8:22 PM MDT, 13 minutes before
NEZ001>003-019>021-054-055-WYZ060-068-230305-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHEYENNE WY
822 PM MDT MON JUN 22 1998

...THE TORNADO WATCH HAS BEEN REPLACED WITH A SEVERE THUNDERSTORM
WATCH IN EFFECT UNTIL 2 AM...

AT 820 PM...STRONG STORMS CONTINUED TO MOVE ACROSS CENTRAL GOSHEN
COUNTY IN WYOMING EAST INTO SIOUX AND SCOTTS BLUFF COUNTIES IN
NEBRASKA.

THE POTENTIAL STILL EXISTS FOR THESE STORMS TO BE NEAR SEVERE
LEVELS FOR THE NEXT FEW HOURS...SO A SEVERE THUNDERSTORM WATCH
IN NOW IN EFFECT UNTIL 2 AM FOR FAR EASTERN WYOMING AND MOST OF
THE NEBRASKA PANHANDLE.

THE BIGGEST THREAT AREA THROUGH 10 PM WILL BE ACROSS THE CENTRAL PART
OF THE PANHANDLE FROM TORRINGTON TO SCOTTSBLUFF AND EASTWARD.

PEOPLE IN FAR EASTERN WYOMING AND THE NEBRASKA PANHANDLE SHOULD
REMAIN ALERT TO STORMS MOVING INTO YOUR AREA...AND BE READY TO MOVE
INDOORS IF THREATENING WEATHER APPROACHES.

JAD

Nearby

Severe Thunderstorm Warnings in Wyoming, 1998Every severe thunderstorm warning in 1998

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.