Alert archive / Nebraska / Severe Thunderstorm Warnings in 1989

Severe Thunderstorm Warning 8, NWS North Platte, NE

May 21, 1989Dundy County, Nebraska

NWS North Platte, NE issued this severe thunderstorm warning at May 21, 1989, 3:16 AM MDT for Dundy County, Nebraska. It was in force for 29 min.

The area

The counties it named.

The facts

Issued
May 21, 1989, 3:16 AM MDT (09:16 UTC)
Expired
May 21, 1989, 3:45 AM MDT
In force
29 min
Issued by
NWS North Platte, NE
Area
Whole counties

County Dundy County, NE

The radar

The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.

The nearest sounding before it

N. Platte/Lee Bi, NE (KLBF), launched 00:00Z, 9.3 hours before the alert went out and 140 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, N. Platte/Lee Bi, NE at 00:00Z on 1989-05-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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, N. Platte/Lee Bi, NE at 00:00Z on 1989-05-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 42 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
2939 m above ground
0-6 km bulk shear
38 kt
0-1 km storm-relative helicity
42 m²/s²
0-3 km storm-relative helicity
75 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

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 21, 12:57 AM MDT, 2 hours 19 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORTH PLATTE NE
155 AM CDT SUN MAY 21 1989

...A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT FOR SOUTHWEST AND
WEST NEBRASKA UNTIL 7 AM CDT...

THUNDERSTORMS DEVELOPED RAPIDLY IN SOUTHWEST NEBRASKA EARLY THIS
SUNDAY MORNING.

AT 130 AM CDT NUMEROUS THUNDERSTORMS AND SHOWERS WERE SCATTERED
ACROSS SOUTHWEST NEBRASKA.  ONE OF THE STRONGER THUNDERSTORMS WAS 10
MILES NORTHEAST OF GRANT NEBRASKA OR 45 MILES SOUTHWEST OF NORTH
PLATTE NEBRASKA...IN PERKINS COUNTY.  ALL THUNDERSTORMS AND SHOWERS
WERE MOVING EAST AT 25 TO 30 MILES AN HOUR.

DANGEROUS LIGHTNING...HAIL...HEAVY RAIN AND GUSTY WINDS CAN BE
EXPECTED IF YOU LIVE IN SOUTHWEST NEBRASKAR...FOR MUCH OF THIS
MORNING.

IF YOU LIVE IN SOUTHWEST NEBRASKA...BE PREPARED TO MOVE TO A PLACE OF
SHELTER IF SEVERE THUNDERSTORMS SHOULD DEVELOP.

MEYER
Special weather statement, May 21, 2:02 AM MDT, 1 hour 14 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORTH PLATTE NE
300 AM CDT SUN MAY 21 1989

...A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT FOR SOUTHWEST AND
WEST NEBRASKA UNTIL 7 AM CDT...

THUNDERSTORMS CONTINUED ACROSS SOUTHWEST NEBRASKA EARLY THIS MORNING.

AT 230 AM CDT NUMEROUS THUNDERSTORMS AND SHOWERS REMAINED SCATTERED
ACROSS SOUTHWEST NEBRASKA.  THE STRONGEST THUNDERSTORM IN SOUTHWEST
NEBRASKA WAS 15 MILES EAST OF GRANT NEBRASKA OR 35 MILES SOUTHWEST OF
NORTH PLATTE NEBRASKA...IN EAST PERKINS COUNTY.  THIS THUNDERSTORM
WAS MOVING SOUTHEAST AT 15 MILES AN HOUR.

AN INTENSE THUNDERSTORM IN EXTREME NORTHEAST COLORADO WAS MOVING EAST
AT 30 MILES AN HOUR WHICH MEANS IT WILL MOVE INTO NORTHWEST CHASE OR
SOUTHWEST PERKINS COUNTIES IN NEBRASKA AROUND 230 AM MDT.  EARLIER
THIS MORNING THIS THUNDERSTORM DROPPED 3/4 INCH DIAMETER HAIL IN
COLORADO.

IF YOU LIVE IN THE VICINITY OF THESE THUNDERSTORMS...BE PREPARED TO
MOVE TO A PLACE OF SAFETY IF NECESSARY.

THE THUNDERSTORMS MOVING INTO AND ACROSS SOUTHWEST NEBRASKA MAY
PRODUCE LARGE HAIL...STRONG GUSTY WINDS IN ADDITION TO BRIEF HEAVY
RAIN AND DANGEROUS LIGHTNING.

MEYER

The office that day

Everything else NWS North Platte, NE issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 21, 2:21 AM MDTSevere Thunderstorm WarningLBFChase69 min
May 21, 4:16 PM MDTSevere Thunderstorm WarningLBFBoyd, Holt, Keya Paha, Rock29 min

Nearby

Severe Thunderstorm Warnings in Nebraska, 1989Every severe thunderstorm warning in 1989

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.