Alert archive / Wyoming / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 5, NWS Cheyenne, WY

March 28, 1998Goshen County, Wyoming; Scotts Bluff County, Nebraska

NWS Cheyenne, WY issued this severe thunderstorm warning at Mar 28, 1998, 3:55 PM MST for Goshen County, Wyoming; Scotts Bluff County, Nebraska. It was in force for 45 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: Mar 28, 1998, 3:55 PM MST (22:55 UTC)
Expired: Mar 28, 1998, 4:40 PM MST
In force: 45 min
Issued by: NWS Cheyenne, WY
Area: Whole counties

Counties Scotts Bluff County, NE, Goshen County, WY

The radar

The Cheyenne radar (KCYS), 111 km from the middle of the area, began a volume at 22:55 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

Denver, CO (KDNR), launched 12:00Z, 10.9 hours before the alert went out and 243 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1602 m above ground
0-6 km bulk shear: 67 kt
0-1 km storm-relative helicity: 91 m²/s²
0-3 km storm-relative helicity: 164 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.

866 
WUUS1 KCYS 282257 RRA
SVRCYS
NEC157-WYC015-282340-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE CHEYENNE WY
355 PM MST SAT MAR 28 1998


THE NATIONAL WEATHER SERVICE IN CHEYENNE WYOMING HAS ISSUED A 

* SEVERE THUNDERSTORM WARNING FOR
  WESTERN SCOTTS BLUFF COUNTY IN THE NEBRASKA PANHANDLE
  EXTREME SOUTHEAST GOSHEN COUNTY IN SOUTHEAST WYOMING

* UNTIL 440 PM MST

* AT 355 PM A SEVERE THUNDERSTORM WAS INDICATED BY RADAR 20 MILES 
  SOUTH OF TORRINGTON MOVING NORTHEAST AT 20 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  STEGALL BY 415 PM MST
  MORRILL BY 430 PM MST
  MITCHELL BY 430 PM MST

LARGE HAIL IS LIKELY WITH THIS STORM.  SEEK SHELTER INSIDE A 
STURDY BUILDING AWAY FROM ALL WINDOWS UNTIL THE STORM PASSES.

SULLIVAN

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 28, 2:15 PM MST	Severe Thunderstorm Warning	CYS	Goshen	60 min
Mar 28, 2:40 PM MST	Tornado Warning	CYS	Goshen	35 min
Mar 28, 3:00 PM MST	Severe Thunderstorm Warning	CYS	Cheyenne	40 min
Mar 28, 3:10 PM MST	Severe Thunderstorm Warning	CYS	Sioux	50 min
Mar 28, 3:50 PM MST	Severe Thunderstorm Warning	CYS	Cheyenne	45 min
Mar 28, 4:00 PM MST	Severe Thunderstorm Warning	CYS	Sioux	60 min
Mar 28, 4:30 PM MST	Severe Thunderstorm Warning	CYS	Cheyenne	30 min
Mar 28, 4:40 PM MST	Severe Thunderstorm Warning	CYS	Scotts Bluff	45 min
Mar 28, 4:50 PM MST	Severe Thunderstorm Warning	CYS	Cheyenne	40 min

Nearby

Severe Thunderstorm Warnings in Wyoming, 1998 Severe Thunderstorm Warnings in Nebraska, 1998 Every 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.