Alert archive / Nebraska / Severe Thunderstorm Warnings in 1994

Severe Thunderstorm Warning 41, NWS North Platte, NE

June 12, 1994Custer County, Nebraska

NWS North Platte, NE issued this severe thunderstorm warning at Jun 12, 1994, 6:45 PM CDT for Custer County, Nebraska. It was in force for 45 min.

The area

The counties it named.

The facts

Issued
Jun 12, 1994, 6:45 PM CDT (23:45 UTC)
Expired
Jun 12, 1994, 7:30 PM CDT
In force
45 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 12:00Z, 11.8 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 12:00Z on 1994-06-12Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1812 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 12:00Z on 1994-06-12The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 186 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
1812 J/kg
Mixed-layer CIN
-200 J/kg
Mixed-layer LCL
1469 m above ground
0-6 km bulk shear
28 kt
0-1 km storm-relative helicity
186 m²/s²
0-3 km storm-relative helicity
203 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.1

Open this sounding in Storm Lab

The text

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

000 
WUUS1 KLBF 122346 RRA
SVRLBF
NEC041-130030-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NORTH PLATTE NE
645 PM CDT SUN JUN 12 1994
 
THE NATIONAL WEATHER SERVICE IN NORTH PLATTE HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  730 PM CDT
FOR PEOPLE IN THE FOLLOWING LOCATION...
 
IN CENTRAL NEBRASKA
 
   ...SOUTHEASTERN CUSTER COUNTY
 
AT 645 PM CDT RADAR INDICATED A SEVERE THUNDERSTORM 10 MILES SOUTHEAST
OF BROKEN BOW NEAR ANSLEY. THIS STORM WAS MOVING EAST AT 30 MILES AN
HOUR. BROKEN BOW IS ABOUT 50 MILES EAST NORTHEAST OF NORTH PLATTE.
 
 
A TORNADO WATCH IS ALSO IN EFFECT FOR THE WARNED AREA.  REMEMBER
SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE TORNADOES
WITH LITTLE OR NO ADVANCE WARNING.  REMAIN CALM BUT BE ALERT TO
RAPIDLY CHANGING WEATHER CONDITIONS.
 
 
MONSON 2345Z

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 12, 3:53 AM CDTSevere Thunderstorm WarningLBFKnox37 min
Jun 12, 4:24 AM CDTSevere Thunderstorm WarningLBFBoyd, Holt66 min
Jun 12, 4:34 PM CDTSevere Thunderstorm WarningLBFAntelope21 min
Jun 12, 5:31 PM CDTSevere Thunderstorm WarningLBFLincoln29 min
Jun 12, 5:40 PM CDTSevere Thunderstorm WarningLBFFrontier, Hayes50 min
Jun 12, 6:08 PM CDTSevere Thunderstorm WarningLBFLincoln37 min
Jun 12, 6:27 PM CDTTornado WarningLBFPierce33 min
Jun 12, 6:30 PM CDTSevere Thunderstorm WarningLBFFrontier30 min
Jun 12, 6:55 PM CDTTornado WarningLBFPierce, Wayne35 min

Nearby

Severe Thunderstorm Warnings in Nebraska, 1994Every severe thunderstorm warning in 1994

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.