Alert archive / Nebraska / Severe Thunderstorm Warnings in 1991

Severe Thunderstorm Warning 71, NWS North Platte, NE

June 18, 1991Lincoln County, Nebraska

NWS North Platte, NE issued this severe thunderstorm warning at Jun 18, 1991, 9:34 PM CDT for Lincoln County, Nebraska. It was in force for 56 min.

The area

The counties it named.

The facts

Issued
Jun 18, 1991, 9:34 PM CDT (02:34 UTC)
Expired
Jun 18, 1991, 10:30 PM CDT
In force
56 min
Issued by
NWS North Platte, NE
Area
Whole counties

County Lincoln County, NE

The nearest sounding before it

N. Platte/Lee Bi, NE (KLBF), launched 00:00Z, 2.6 hours before the alert went out and 15 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 1991-06-19Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1872 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 1991-06-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 97 square meters per square second.193958Sfc1 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
1872 J/kg
Mixed-layer CIN
-101 J/kg
Mixed-layer LCL
1592 m above ground
0-6 km bulk shear
29 kt
0-1 km storm-relative helicity
97 m²/s²
0-3 km storm-relative helicity
198 m²/s²
Significant tornado parameter
0.1
Supercell composite
4.0

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, Jun 18, 4:56 PM CDT, 4 hours 38 minutes before
NEZ006-012-182255-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORTH PLATTE NE
355 PM MDT TUE JUN 18 1991

...TORNADO WATCH FOR GRANT...ARTHUR AND KEITH COUNTIES UNTIL 9 PM MDT..

AT 350 PM MDT...RADAR SHOWED THUNDERSTORMS WITH BRIEF HEAVY RAIN
DEVELOPING OVER WEST CENTRAL NEBRASKA.  THE THUNDERSTORMS WERE LOCATED
FROM ASHBY TO 15 MILES NORTHEAST OF KEYSTONE...OR FROM 35 MILES WEST
NORTHWEST TO 75 MILES NORTHWEST OF NORTH PLATTE.  THE STRONGEST STORM
WAS LOCATED 30 MILES WEST NORTHWEST OF NORTH PLATTE IN SOUTHWESTERN
MCPHERSON COUNTY.  THE STORMS WERE MOVING EAST AT 30 MPH.

PERSONS IN THE PATH OF THESE STORMS CAN EXPECT BRIEF HEAVY RAIN...SMALL
HAIL...GUSTY WINDS AND DANGEROUS LIGHTNING.

WALAWENDER

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 18, 7:06 PM CDTSevere Thunderstorm WarningLBFArthur13 min
Jun 18, 7:19 PM CDTTornado WarningLBFArthur26 min
Jun 18, 7:34 PM CDTSevere Thunderstorm WarningLBFThomas56 min
Jun 18, 7:34 PM CDTSevere Thunderstorm WarningLBFHooker26 min
Jun 18, 8:15 PM CDTSevere Thunderstorm WarningLBFKeith60 min
Jun 18, 8:37 PM CDTSevere Thunderstorm WarningLBFPerkins68 min
Jun 18, 9:03 PM CDTTornado WarningLBFKeith27 min
Jun 18, 10:26 PM CDTTornado WarningLBFLincoln49 min

Nearby

Severe Thunderstorm Warnings in Nebraska, 1991Every severe thunderstorm warning 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.