Alert archive / Nebraska / Tornado Warnings in 1991

Tornado Warning 19, NWS North Platte, NE

May 30, 1991Custer County, Nebraska

NWS North Platte, NE issued this tornado warning at May 30, 1991, 10:50 PM CDT for Custer County, Nebraska. It was in force for 10 min.

The area

The counties it named.

The facts

Issued
May 30, 1991, 10:50 PM CDT (03:50 UTC)
Expired
May 30, 1991, 11:00 PM CDT
In force
10 min
Issued by
NWS North Platte, NE
Area
Whole counties

County Custer County, NE

The nearest sounding before it

N. Platte/Lee Bi, NE (KLBF), launched 00:00Z, 3.8 hours before the alert went out and 79 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 1991-05-31Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2074 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, N. Platte/Lee Bi, NE at 00:00Z on 1991-05-31The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 106 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
2074 J/kg
Mixed-layer CIN
-4 J/kg
Mixed-layer LCL
1228 m above ground
0-6 km bulk shear
42 kt
0-1 km storm-relative helicity
106 m²/s²
0-3 km storm-relative helicity
194 m²/s²
Significant tornado parameter
1.1
Supercell composite
9.2

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KLBF 310349
TORLBF
NEC041-310400-
 
BULLETIN - EBS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE NORTH PLATTE NE
1050 PM CDT THU MAY 30 1991
 
THE NATIONAL WEATHER SERVICE IN NORTH PLATTE HAS ISSUED A
TORNADO WARNING EFFECTIVE UNTIL 1100 PM CDT
FOR PEOPLE IN THE FOLLOWING LOCATION...
 
IN CENTRAL NEBRASKA
 
   ...NORTHEASTERN CUSTER COUNTY
 
AT 1043 PM CDT SPOTTERS REPORTED A TORNADO JUST NORTHWEST OF THE TOWN OF
SARGENT...WHICH IS 61 MILES WEST NORTHWEST OF GRAND ISLAND NEBRASKA IN
NORTHEAST CUSTER COUNTY.
 
 
IF YOU LIVE IN A HOME OR APARTMENT...SEEK SHELTER IN THE
INNERMOST PORTION OF THE BUILDING ON THE LOWEST FLOOR.  GET TO
A BASEMENT IF ONE IS AVAILABLE.  AVOID WINDOWS AND PROTECT YOUR
BODY FROM FLYING DEBRIS WITH CUSHIONS...BLANKETS...OR PILLOWS.
 
SC

What forecasters said that day

The local office's own words before this tornado 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 30, 8:57 PM CDT, 1 hour 53 minutes before
NEZ007-310255-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORTH PLATTE NE
855 PM CDT THU MAY 30 1991

...THUNDERSTORMS DEVELOPING ACROSS SOUTHEAST CUSTER COUNTY...

LATEST RADAR OBSERVATIONS SHOWED THUNDERSTORMS DEVELOPING
RAPIDLY ACROSS NORTHEAST DAWSON COUNTY ABOUT 30 MILES SOUTH
OF BROKEN BOW NEBRASKA.  THESE THUNDERSTORMS WILL BE MOVING
NORTH AT 25 MILES AN HOUR INTO SOUTHERN CUSTER COUNTY.  PERSONS
IN THE TOWN OF ANSLEY SHOULD PREPARE FOR THUNDERSTORMS WITH
VERY HEAVY RAIN...STRONG GUSTY WINDS...LARGE HAIL AND POSSIBLE
TORNADOES BY 940 PM CDT.  ANOTHER THUNDERSTORM WAS DEVELOPING
NEAR THE TOWN OF OCONTO...WHICH IS 40 MILES EAST OF NORTH PLATTE.

REMEMBER A TORNADO WATCH REMAIXNS IN EFFECT FOR MUCH OF SOUTHWEST
AND WEST CENTRAL NEBRASKA UNTIL 2 AM CDT.

SC
Special weather statement, May 30, 9:00 PM CDT, 1 hour 50 minutes before
NEZ007-310255-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORTH PLATTE NE
855 PM CDT THU MAY 30 1991

...THUNDERSTORMS DEVELOPING ACROSS SOUTHEAST CUSTER COUNTY...

AT 850 PM CDT...LATEST RADAR OBSERVATIONS SHOWED THUNDERSTORMS
DEVELOPING RAPIDLY ACROSS NORTHEAST DAWSON COUNTY ABOUT 30 MILES
SOUTH OF BROKEN BOW NEBRASKA.  THESE THUNDERSTORMS WILL BE MOVING
NORTH AT 25 MILES AN HOUR INTO SOUTHERN CUSTER COUNTY.  PERSONS
IN THE TOWN OF ANSLEY SHOULD PREPARE FOR THUNDERSTORMS WITH
VERY HEAVY RAIN...STRONG GUSTY WINDS...LARGE HAIL AND POSSIBLE
TORNADOES BY 940 PM CDT.  ANOTHER THUNDERSTORM WAS DEVELOPING
NEAR THE TOWN OF OCONTO...WHICH IS 40 MILES EAST OF NORTH PLATTE.

REMEMBER A_ TORNADO WATCH REMAINS IN EFFECT FOR MUCH OF SOUTHWEST
AND WEST CENTRAL NEBRASKA UNTIL 2 AM CDT.

SC

The office that day

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

IssuedProductOfficeCountiesLasted
May 30, 9:25 PM CDTSevere Thunderstorm WarningLBFCuster65 min
May 30, 9:37 PM CDTTornado WarningLBFCuster38 min
May 30, 9:45 PM CDTSevere Thunderstorm WarningLBFGarfield, Loup60 min
May 30, 10:02 PM CDTTornado WarningLBFGarfield, Loup28 min
May 30, 10:16 PM CDTTornado WarningLBFCuster29 min
May 30, 10:38 PM CDTSevere Thunderstorm WarningLBFGarfield, Holt, Loup67 min
May 30, 10:53 PM CDTTornado WarningLBFGarfield, Loup37 min
May 30, 11:58 PM CDTSevere Thunderstorm WarningLBFMadison32 min
May 31, 12:08 AM CDTTornado WarningLBFMadison, Stanton37 min
May 31, 12:52 AM CDTTornado WarningLBFMadison, Stanton23 min

Nearby

Tornado Warnings in Nebraska, 1991Every tornado warning in 1991Tornadoes in 1991

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.