Alert archive / Nebraska / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 57, NWS Cheyenne, WY

May 29, 1998Sioux County, Nebraska

NWS Cheyenne, WY issued this severe thunderstorm warning at May 29, 1998, 9:20 PM MDT for Sioux County, Nebraska. It was in force for 15 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
May 29, 1998, 9:20 PM MDT (03:20 UTC)
Expired
May 29, 1998, 9:35 PM MDT
In force
15 min
Issued by
NWS Cheyenne, WY
Area
Whole counties

County Sioux County, NE

The radar

The Cheyenne radar (KCYS), 172 km from the middle of the area, began a volume at 03:23 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 00:00Z, 3.3 hours before the alert went out and 190 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 1998-05-30Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 556 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 1998-05-30The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 150 square meters per square second.1939587897Sfc1 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
556 J/kg
Mixed-layer CIN
-202 J/kg
Mixed-layer LCL
1826 m above ground
0-6 km bulk shear
51 kt
0-1 km storm-relative helicity
150 m²/s²
0-3 km storm-relative helicity
291 m²/s²
Significant tornado parameter
0.0
Supercell composite
13.5

Open this sounding in Storm Lab

The text

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

527 
WUUS1 KCYS 300322 RRA
SVRCYS
NEC165-300340-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE CHEYENNE WY
920 PM MDT FRI MAY 29 1998

THE NATIONAL WEATHER SERVICE IN CHEYENNE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  EAST CENTRAL SIOUX COUNTY IN THE NEBRASKA PANHANDLE

* UNTIL 935 PM MDT

* AT 919 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 25 MILES SOUTHEAST OF HARRISON... MOVING
  NORTHEAST AT 30 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  WILL REMAIN IN OPEN AREAS FOR THE DURATION OF THE WARNING

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

WEILAND

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, May 29, 7:41 PM MDT, 1 hour 39 minutes before
WTZ060-068-NEZ001-300300-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHEYENNE WY
741 PM MDT FRI MAY 29 1998

...A STRONG THUNDERSTORM HAS DEVELOPED IN NORTHERN GOSHEN COUNTY...

AT 735 PM...A STRONG THUNDERSTORM WAS LOCATED ALONG HIGHWAY 85...25
MILES TO THE NORTH OF TORRINGTON.  THIS STORM DEVELOPED RAPIDLY SINCE
715 PM.  THE STRONG THUNDERSTORM IS MOVING TO THE NORTHEAST AT 35 MPH
AND AT ITS CURRENT MOVEMENT WILL AFFECT HARRISON NEBRASKA AROUND 820
PM.

THIS STRONG STORM IS CAPABLE OF PRODUCING SMALL HAIL...BRIEF HEAVY
RAIN AND WIND GUSTS TO 45 MPH.

PEOPLE FROM NORTHEAST GOSHEN COUNTY TO HARRISON SHOULD BE AWARE OF THE
APPROACHING STORM AND SEEK SHELTER IN A BUILDING WHEN THE STORM NEARS.

WCJIN-WYSE
WEILAND
Special weather statement, May 29, 7:41 PM MDT, 1 hour 39 minutes before
WTZ060-068-NEZ001-300300-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHEYENNE WY
741 PM MDT FRI MAY 29 1998

...A STRONG THUNDERSTORM HAS DEVELOPED IN NORTHERN GOSHEN COUNTY...

AT 735 PM...A STRONG THUNDERSTORM WAS LOCATED ALONG HIGHWAY 85...25
MILES TO THE NORTH OF TORRINGTON.  THIS STORM DEVELOPED RAPIDLY SINCE
715 PM.  THE STRONG THUNDERSTORM IS MOVING TO THE NORTHEAST AT 35 MPH
AND AT ITS CURRENT MOVEMENT WILL AFFECT HARRISON NEBRASKA AROUND 820
PM.

THIS STRONG STORM IS CAPABLE OF PRODUCING SMALL HAIL...BRIEF HEAVY
RAIN AND WIND GUSTS TO 45 MPH.

PEOPLE FROM NORTHEAST GOSHEN COUNTY TO HARRISON SHOULD BE AWARE OF THE
APPROACHING STORM AND SEEK SHELTER IN A BUILDING WHEN THE STORM NEARS.

WCJIN-WYSE
WEILAND
Special weather statement, May 29, 8:25 PM MDT, 55 minutes before
WYZ068-NEZ001-300400-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHEYENNE WY
825 PM MDT FRI MAY 29 1998

...A LINE OF STRONG THUNDERSTORMS HAVE DEVELOPED OVER NORTHERN
GOSHEN COUNTY WYOMING AND SIOUX COUNTY NEBRASKA...

AT 820 PM...DOPPLER WEATHER RADAR INDICATED A LINE OF STRONG
THUNDERSTORMS EXTENDING FROM 10 MILES NORTH OF TORRINGTON WYOMING TO
30 MILES WEST OF CHADRON NEBRASKA.  THESE STORMS ARE MOVING
NORTHEAST AT 30 MPH. AT THEIR CURRENT MOVEMENT THESE THUNDERSTORMS
WILL AFFECT FORT ROBINSON AND CRAWFORD BY 850 PM.

THESE STRONG STORMS ARE CAPABLE OF PRODUCING SMALL HAIL...BRIEF
HEAVY RAIN AND WIND GUSTS TO 45 MPH.

PEOPLE IN THE PATH OF THESE STORMS IN EASTERN GOSHEN COUNTY WYOMING
AND SIOUX AND DAWES COUNTY NEBRASKA SHOULD WATCH FOR THE
THUNDERSTORMS AND SEEK SHELTER IN A BUILDING WHEN THEY APPROACH.

WCJIN-WYSE
LRE
Special weather statement, May 29, 8:25 PM MDT, 55 minutes before
WYZ068-NEZ001-300400-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHEYENNE WY
825 PM MDT FRI MAY 29 1998

...A LINE OF STRONG THUNDERSTORMS HAVE DEVELOPED OVER NORTHERN
GOSHEN COUNTY WYOMING AND SIOUX COUNTY NEBRASKA...

AT 820 PM...DOPPLER WEATHER RADAR INDICATED A LINE OF STRONG
THUNDERSTORMS EXTENDING FROM 10 MILES NORTH OF TORRINGTON WYOMING TO
30 MILES WEST OF CHADRON NEBRASKA.  THESE STORMS ARE MOVING
NORTHEAST AT 30 MPH. AT THEIR CURRENT MOVEMENT THESE THUNDERSTORMS
WILL AFFECT FORT ROBINSON AND CRAWFORD BY 850 PM.

THESE STRONG STORMS ARE CAPABLE OF PRODUCING SMALL HAIL...BRIEF
HEAVY RAIN AND WIND GUSTS TO 45 MPH.

PEOPLE IN THE PATH OF THESE STORMS IN EASTERN GOSHEN COUNTY WYOMING
AND SIOUX AND DAWES COUNTY NEBRASKA SHOULD WATCH FOR THE
THUNDERSTORMS AND SEEK SHELTER IN A BUILDING WHEN THEY APPROACH.

WCJIN-WYSE
LRE

The office that day

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

IssuedProductOfficeCountiesLasted
May 29, 8:30 PM MDTSevere Thunderstorm WarningCYSSioux50 min
May 29, 9:14 PM MDTSevere Thunderstorm WarningCYSBox Butte, Dawes51 min
May 29, 9:31 PM MDTSevere Thunderstorm WarningCYSSioux49 min
May 29, 10:06 PM MDTSevere Thunderstorm WarningCYSDawes, Sioux49 min
May 29, 10:54 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.