Alert archive / Nebraska / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 39, NWS Cheyenne, WY

May 19, 1998Morrill County, Nebraska

NWS Cheyenne, WY issued this severe thunderstorm warning at May 19, 1998, 9:19 PM MDT for Morrill County, Nebraska. It was in force for 31 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 19, 1998, 9:19 PM MDT (03:19 UTC)
Expired
May 19, 1998, 9:50 PM MDT
In force
31 min
Issued by
NWS Cheyenne, WY
Area
Whole counties

County Morrill County, NE

The nearest sounding before it

Denver, CO (KDNR), launched 00:00Z, 3.3 hours before the alert went out and 206 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 1998-05-20Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 22 joules per kilogram.LCLEL10008507005003002001001 km2 km3 km6 km9 km12 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 1998-05-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 28 square meters per square second.19395878Sfc1 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
22 J/kg
Mixed-layer CIN
-2 J/kg
Mixed-layer LCL
3900 m above ground
0-6 km bulk shear
29 kt
0-1 km storm-relative helicity
28 m²/s²
0-3 km storm-relative helicity
26 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.

852 
WUUS1 KCYS 200320 RRA
SVRCYS
NEC123-200350-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE CHEYENNE WY
919 PM MDT TUE MAY 19 1998

THE NATIONAL WEATHER SERVICE IN CHEYENNE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHERN MORRILL COUNTY IN WESTERN NEBRASKA PANHANDLE

* UNTIL 950 PM MDT

* AT 916 PM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 12 SOUTH OF BRIDGEPORT... MOVING NORTHEAST AT 15
  MPH.

* THE SEVERE THUNDERSTORM WILL BE...
  OVER OPEN COUNTRY

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


PAL

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 19, 8:02 PM MDT, 1 hour 17 minutes before
NEZ001-019-020-054-WYZ060-068-070-200215-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHEYENNE WY
802 PM MDT TUE MAY 19 1998

THE TORNADO WATCH HAS BEEN CANCELED FOR NIOBRARA...GOSHEN
AND EASTERN LARAMIE COUNTIES IN EASTERN WYOMING AND FOR
SIOUX...SCOTTS BLUFFS...BANNER AND KIMBALL COUNTIES IN THE
NEBRASKA PANHANDLE.

THE TORNADO WATCH REMAINS IN EFFECT UNTIL 9 PM MDT FOR DAWES...
BOX BUTTE...MORRILL...AND CHEYENNE COUNTIES IN THE NEBRASKA
PANHANDLE.

WCJIN-WYNE-WYSE
PAL
Special weather statement, May 19, 8:02 PM MDT, 1 hour 17 minutes before
NEZ001-019-020-054-WYZ060-068-070-200215-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHEYENNE WY
802 PM MDT TUE MAY 19 1998

THE TORNADO WATCH HAS BEEN CANCELED FOR NIOBRARA...GOSHEN
AND EASTERN LARAMIE COUNTIES IN EASTERN WYOMING AND FOR
SIOUX...SCOTTS BLUFFS...BANNER AND KIMBALL COUNTIES IN THE
NEBRASKA PANHANDLE.

THE TORNADO WATCH REMAINS IN EFFECT UNTIL 9 PM MDT FOR DAWES...
BOX BUTTE...MORRILL...AND CHEYENNE COUNTIES IN THE NEBRASKA
PANHANDLE.

WCJIN-WYNE-WYSE
PAL
Special weather statement, May 19, 9:15 PM MDT, 4 minutes before
NEZ002-003-021-055-200335-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHEYENNE WY
915 PM MDT TUE MAY 19 1998

THE TORNADO WATCH FOR DAWES...BOX BUTTE...MORRILL AND CHEYENNE
COUNTIES OF THE NEBRASKA PANHANDLE EXPIRED AT 9 PM.

PAL
Special weather statement, May 19, 9:15 PM MDT, 4 minutes before
NEZ002-003-021-055-200335-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHEYENNE WY
915 PM MDT TUE MAY 19 1998

THE TORNADO WATCH FOR DAWES...BOX BUTTE...MORRILL AND CHEYENNE
COUNTIES OF THE NEBRASKA PANHANDLE EXPIRED AT 9 PM.

PAL

The office that day

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

IssuedProductOfficeCountiesLasted
May 19, 6:09 PM MDTSevere Thunderstorm WarningCYSDawes46 min
May 19, 6:27 PM MDTSevere Thunderstorm WarningCYSMorrill33 min
May 19, 6:38 PM MDTSevere Thunderstorm WarningCYSDawes32 min
May 19, 6:56 PM MDTSevere Thunderstorm WarningCYSCheyenne29 min
May 19, 7:26 PM MDTSevere Thunderstorm WarningCYSCheyenne44 min
May 19, 9:39 PM MDTSevere Thunderstorm WarningCYSCheyenne31 min
May 20, 4:13 PM MDTSevere Thunderstorm WarningCYSSioux32 min
May 20, 4:46 PM MDTSevere Thunderstorm WarningCYSScotts Bluff34 min
May 20, 5:28 PM MDTSevere Thunderstorm WarningCYSMorrill32 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.