Alert archive / Nebraska / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 35, NWS Cheyenne, WY

May 19, 1998Morrill County, Nebraska

NWS Cheyenne, WY issued this severe thunderstorm warning at May 19, 1998, 6:27 PM MDT for Morrill County, Nebraska. It was in force for 33 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, 6:27 PM MDT (00:27 UTC)
Expired: May 19, 1998, 7:00 PM MDT
In force: 33 min
Issued by: NWS Cheyenne, WY
Area: Whole counties

County Morrill County, NE

The radar

The Cheyenne radar (KCYS), 162 km from the middle of the area, began a volume at 00:31 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
May 19, 3:30 PM MDT	Tornado Watch	SPC	6 hr

The nearest sounding before it

Denver, CO (KDNR), launched 00:00Z, 0.5 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-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: 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.

888 
WUUS1 KCYS 200025 RRA
SVRCYS
NEC123-200100-

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

THE NATIONAL WEATHER SERVICE IN CHEYENNE HAS ISSUED A

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

* UNTIL 700 PM MDT

* AT 622 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 16 MILES EAST OF BRIDGEPORT ... MOVING EAST AT 5
  MPH. THIS WARNING REPLACES THE EARLIER WARNING FOR SOUTHERN MORRILL
  COUNTY.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  BROADWATER NOW

THIS STORM HAS A HISTORY OF PRODUCING LARGE MARBLE SIZE HAIL...STRONG
GUSTY WINDS TO OVER 55 MPH...AND DANGEROUS LIGHTNING.

GO INSIDE A STURDY BUILDING AND STAY AWAY FROM WINDOWS A TORNADO
WATCH IS IN EFFECT. SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO
PRODUCE TORNADOES WITH LITTLE OR NO ADVANCE WARNING.

LRE


&

The office that day

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

Issued	Product	Office	Counties	Lasted
May 19, 6:09 PM MDT	Severe Thunderstorm Warning	CYS	Dawes	46 min
May 19, 6:38 PM MDT	Severe Thunderstorm Warning	CYS	Dawes	32 min
May 19, 6:56 PM MDT	Severe Thunderstorm Warning	CYS	Cheyenne	29 min
May 19, 7:26 PM MDT	Severe Thunderstorm Warning	CYS	Cheyenne	44 min
May 19, 9:19 PM MDT	Severe Thunderstorm Warning	CYS	Morrill	31 min
May 19, 9:39 PM MDT	Severe Thunderstorm Warning	CYS	Cheyenne	31 min
May 20, 4:13 PM MDT	Severe Thunderstorm Warning	CYS	Sioux	32 min
May 20, 4:46 PM MDT	Severe Thunderstorm Warning	CYS	Scotts Bluff	34 min
May 20, 5:28 PM MDT	Severe Thunderstorm Warning	CYS	Morrill	32 min

Nearby

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.