Alert archive / Wyoming / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 96, NWS Cheyenne, WY

July 2, 1998Goshen County, Wyoming

NWS Cheyenne, WY issued this severe thunderstorm warning at Jul 2, 1998, 5:51 PM MDT for Goshen County, Wyoming. It was in force for 49 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 2, 1998, 5:51 PM MDT (23:51 UTC)
Expired
Jul 2, 1998, 6:40 PM MDT
In force
49 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 23:51 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

Rapid City, SD (KUNR), launched 12:00Z, 11.9 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 12:00Z on 1998-07-02Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 280 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 12:00Z on 1998-07-02The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 9 square meters per square second.193958Sfc1 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
280 J/kg
Mixed-layer CIN
-262 J/kg
Mixed-layer LCL
1050 m above ground
0-6 km bulk shear
15 kt
0-1 km storm-relative helicity
9 m²/s²
0-3 km storm-relative helicity
2 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 
TTAA00 KCYS 022350 RRA
SVRCYS
WYC015-030040-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE CHEYENNE WY
551 PM MDT THU JUL 2 1998

THE NATIONAL WEATHER SERVICE IN CHEYENNE HAS ISSUED A

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

* UNTIL 640 PM MDT

* AT 549 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 20 MILES WEST OF TORRINGTON... MOVING NORTHEAST
  AT 20 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  LINGLE BY 625 PM MDT

DAMAGING WINDS AND LARGE HAIL ARE LIKELY. GO INSIDE A STURDY
BUILDING AND STAY AWAY FROM WINDOWS!

WCJIN-WYSE
ROBINSON

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 1, 7:10 PM MDTSevere Thunderstorm WarningCYSConverse60 min
Jul 1, 7:59 PM MDTTornado WarningCYSConverse31 min
Jul 1, 8:30 PM MDTSevere Thunderstorm WarningCYSConverse60 min
Jul 1, 9:22 PM MDTFlash Flood WarningCYSConverse6 hr
Jul 1, 9:33 PM MDTSevere Thunderstorm WarningCYSConverse47 min
Jul 1, 10:01 PM MDTSevere Thunderstorm WarningCYSNiobrara44 min
Jul 2, 3:47 PM MDTTornado WarningCYSAlbany28 min
Jul 2, 3:53 PM MDTSevere Thunderstorm WarningCYSAlbany47 min
Jul 2, 4:35 PM MDTSevere Thunderstorm WarningCYSLaramie45 min
Jul 2, 4:54 PM MDTSevere Thunderstorm WarningCYSLaramie41 min
Jul 2, 5:31 PM MDTSevere Thunderstorm WarningCYSLaramie49 min

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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.