Alert archive / Nebraska / Severe Thunderstorm Warnings in 1991

Severe Thunderstorm Warning 67, NWS North Platte, NE

June 18, 1991Thomas County, Nebraska

NWS North Platte, NE issued this severe thunderstorm warning at Jun 18, 1991, 7:34 PM CDT for Thomas County, Nebraska. It was in force for 56 min.

The area

The counties it named.

The facts

Issued
Jun 18, 1991, 7:34 PM CDT (00:34 UTC)
Expired
Jun 18, 1991, 8:30 PM CDT
In force
56 min
Issued by
NWS North Platte, NE
Area
Whole counties

County Thomas County, NE

The nearest sounding before it

N. Platte/Lee Bi, NE (KLBF), launched 00:00Z, 0.6 hours before the alert went out and 87 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

Local storm report, Jun 18, 2:34 PM CDT, 5 hours before
LOCAL STORM REPORT...PRELIMINARY...
NATIONAL WEATHER SERVICE NORTH PLATTE NE
200 PM CDT TUE JUN 18 1991

...REPORTS FROM JUNE 17 1991...

TIME             LOCATION                         EVENT

305 PM MDT       5 MI SW OF HYANNIS               PUBLIC-SHERIFF
                 AND 15 MI S OF ASHBY             RPRTD FUNNELS

335 PM MDT       LEMOYNE                          SPOTTERS RPRTD
                                                  FUNNELS
405 PM MDT       JUST WEST OF MULLEN              RADAR INDCD HOOK
(HOOKER COUNTY SHERIFF RPRTD 6 SEPARATE TORNADOES FM 400-410 PM MDT)

425 PM MDT       5 MI W OF MULLEN                 RADAR INDCD HOOK

430 PM MDT       15 MI N OF TRYON                 TORNADO...BY SHERRIFF
>
447 PM MDT       VENANGO                          FUNNEL RPRTD
                                                  BY OGALLALA
                                                  WARNING POINT

618 PM CDT       8 MI W OF TRYON                  RADAR INDCD HOOK

640 PM CDT       5 MI N OF TRYON                  RADAR INDCD HOOK

808 PM CDT       UNION PACIFIC RR SHOPS           FUNNEL AND 1 INCH
                 (JUST WEST OF LBF)               HAIL

825 PM CDT       INDIAN HILLS (SW OF LBF)         3/4 INCH HAIL BY
                                                  OFF DUTY WEATHERMAN

828 PM CDT       NORTH PLATTE (SOUTH TABOR ST)    MARBLE HAIL

835 PM CDT       NORTH PLATTE                     NMRS RPRTS OF
                                                  1/2 TO 1 INCH HAIL

935 PM CDT       ANSLEY                           TAYLOR WARNING PT
                                                  RPRTD PEA-MARBLE HAIL

1000 PM CDT      MASON CITY                       PEA TO MARBLE HAIL
>
1000 PM CDT      WEST SIDE OF MCCOOK              PEA-MARBLE HAIL

1010-1025 PM CDT MCCOOK                           URBAN STREET
                                                  FLOODING/PEA HAIL

1030 PM CDT      BARTLEY                          PEA SIZED HAIL

SC
Special weather statement, Jun 18, 4:56 PM CDT, 2 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 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, 9:34 PM CDTSevere Thunderstorm WarningLBFLincoln56 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.