Alert archive / Nebraska / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 103, NWS Cheyenne, WY

July 2, 1998Cheyenne County, Nebraska

NWS Cheyenne, WY issued this severe thunderstorm warning at Jul 2, 1998, 9:21 PM MDT for Cheyenne County, Nebraska. 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, 9:21 PM MDT (03:21 UTC)
Expired
Jul 2, 1998, 10:10 PM MDT
In force
49 min
Issued by
NWS Cheyenne, WY
Area
Whole counties

County Cheyenne County, NE

The radar

The Cheyenne radar (KCYS), 152 km from the middle of the area, began a volume at 03:22 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 00:00Z, 3.4 hours before the alert went out and 151 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, Denver, CO at 00:00Z on 1998-07-03Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 881 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, Denver, CO at 00:00Z on 1998-07-03The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 18 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
881 J/kg
Mixed-layer CIN
-31 J/kg
Mixed-layer LCL
2918 m above ground
0-6 km bulk shear
8 kt
0-1 km storm-relative helicity
18 m²/s²
0-3 km storm-relative helicity
8 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 030319
SVRCYS
NEC033-030410-

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

THE NATIONAL WEATHER SERVICE IN CHEYENNE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHERN CHEYENNE COUNTY IN THE NEBRASKA PANHANDLE

* UNTIL 1010 PM MDT

* AT AT 917 PM...SPOTTERS INDICATED A SEVERE THUNDERSTORM 15 MILES
  NORTH OF SINDEY... MOVING EAST AT 25 MPH.  THIS STORM WAS PRODUCING
  WIND GUSTS TO 60 MPH IN DALTON.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  DALTON THROUGH 930 PM
  GURLEY THROUGH 930 PM

THIS STORM HAS A HISTORY OF DAMAGING WIND. GO INSIDE A STURDY
BUILDING AND STAY AWAY FROM WINDOWS!

&
DMM


&

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 2, 7:32 PM MDTSevere Thunderstorm WarningCYSScotts Bluff53 min
Jul 2, 8:17 PM MDTSevere Thunderstorm WarningCYSKimball43 min
Jul 2, 8:24 PM MDTSevere Thunderstorm WarningCYSScotts Bluff46 min
Jul 2, 8:32 PM MDTSevere Thunderstorm WarningCYSCheyenne48 min
Jul 2, 9:00 PM MDTSevere Thunderstorm WarningCYSMorrill45 min
Jul 2, 9:33 PM MDTTornado WarningCYSMorrill27 min
Jul 2, 9:43 PM MDTSevere Thunderstorm WarningCYSMorrill47 min
Jul 2, 10:31 PM MDTSevere Thunderstorm WarningCYSDawes44 min
Jul 2, 11:12 PM MDTSevere Thunderstorm WarningCYSDawes
Jul 2, 11:44 PM MDTSevere Thunderstorm WarningCYSDawes51 min

Nearby

Severe Thunderstorm Warnings in Nebraska, 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.