Alert archive / Nebraska / Severe Thunderstorm Warnings in 1986

Severe Thunderstorm Warning 78, NWS North Platte, NE

July 18, 1986Logan County, McPherson County, Nebraska

NWS North Platte, NE issued this severe thunderstorm warning at Jul 18, 1986, 6:14 PM CDT for Logan County, McPherson County, Nebraska. It was in force for 56 min.

The area

The counties it named.

The facts

Issued
Jul 18, 1986, 6:14 PM CDT (23:14 UTC)
Expired
Jul 18, 1986, 7:10 PM CDT
In force
56 min
Issued by
NWS North Platte, NE
Area
Whole counties

Counties Logan County, NE, McPherson 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 12:00Z, 11.2 hours before the alert went out and 51 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 1986-07-18Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1547 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 1986-07-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -14 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
1547 J/kg
Mixed-layer CIN
-267 J/kg
Mixed-layer LCL
1702 m above ground
0-6 km bulk shear
27 kt
0-1 km storm-relative helicity
-14 m²/s²
0-3 km storm-relative helicity
50 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.4

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KLBF 182314
SVRLBF
NEC113-117-190010-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NORTH PLATTE NE
614 PM CDT FRI JUL 18 1986

THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM 
WARNING EFFECTIVE UNTIL 710 PM CDT FOR PEOPLE IN THE FOLLOWING 
COUNTIES OF

WEST CENTRAL NEBRASKA...WESTERN LOGAN AND EASTERN MCPHERSON

AT 610 PM CDT RADAR INDICATED A SEVERE THUNDERSTORM 7 MILES WEST OF
STAPLETON NEBRASKA MOVING TO THE EAST AT 15 MILES AN HOUR.
THIS INCLUDES THE COMMUNITY OF STAPLETON.

IF THREATENING WEATHER APPROACHES...GET TO A REINFORCED SHELTER AND
PREPARE FOR STRONG DAMAGING WIND..LARGE HAIL..VERY HEAVY RAIN..AND
DANGEROUS LIGHTNING.

IF THREATENING WEATHER APPROACHES...GET TO A REINFORCED SHELTER AND
PREPARE FOR STRONG DAMAGING WIND..LARGE HAIL..VERY HEAVY RAIN AND
DANGEROUS LIGHTNING.  REMEMBER...THESE STORMS CAN AND OCCASIONALLY
DO PRODUCE A TORNADO WITH LITTLE OR NO ADVANCE WARNING..SO BE ON THE
LOOKOUT!!

 MONSON 2312Z

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 18, 3:39 PM CDTSevere Thunderstorm WarningLBFBoyd, Rock51 min
Jul 18, 3:55 PM CDTSevere Thunderstorm WarningLBFHolt, Keya Paha35 min
Jul 18, 4:31 PM CDTSevere Thunderstorm WarningLBFHolt, Rock59 min
Jul 18, 5:28 PM CDTSevere Thunderstorm WarningLBFHolt62 min
Jul 18, 6:14 PM CDTTornado WarningLBFKnox26 min
Jul 18, 6:43 PM CDTTornado WarningLBFKnox27 min

Nearby

Severe Thunderstorm Warnings in Nebraska, 1986Every severe thunderstorm warning in 1986

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.