Alert archive / Nebraska / Severe Thunderstorm Warnings in 1986

Severe Thunderstorm Warning 59, NWS North Platte, NE

June 30, 1986Thomas County, Nebraska

NWS North Platte, NE issued this severe thunderstorm warning at Jun 30, 1986, 9:14 AM CDT for Thomas County, Nebraska. It was in force for 61 min. 1 report came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued: Jun 30, 1986, 9:14 AM CDT (14:14 UTC)
Expired: Jun 30, 1986, 10:15 AM CDT
In force: 61 min
Issued by: NWS North Platte, NE
Area: Whole counties

County Thomas County, NE

The radar

The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.

What was reported inside it

Time	Report	Where	Remark
Jun 30, 9:38 AM CDT	Hail 3	Thomas, NE

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in. Storm Data before 1996 records only tornadoes, thunderstorm wind and hail.

The nearest sounding before it

N. Platte/Lee Bi, NE (KLBF), launched 12:00Z, 2.2 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 486 J/kg
Mixed-layer CIN: -320 J/kg
Mixed-layer LCL: 1003 m above ground
0-6 km bulk shear: 46 kt
0-1 km storm-relative helicity: 52 m²/s²
0-3 km storm-relative helicity: 98 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KLBF 301414
SVRLBF
NEC171-301515-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NORTH PLATTE NE
914 AM CDT MON JUN 30 1986

THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM 
WARNING EFFECTIVE UNTIL 1015 AM CDT FOR PEOPLE IN THE FOLLOWING 
COUNTY OF

WEST CENTRAL NEBRASKA...NORTHEAST THOMAS

AT 905 AM CDT A SEVERE THUNDERSTORM WAS LOCATED 55 MILES NNW OF
NORTH PLATTE NEBRASKA .. MOVING TOWARD THE SOUTHEAST AT 30 MILES
PER HOUR. PERSONS IN THE TOWNS OF HALSEY .. THEDFORD AND SENECA
SHOULD BE ON THE ALERT FOR THIS THUNDERSTORM.

SEVERE THUNDERSTORMS PRODUCE DAMAGING WINDS IN EXCESS OF 60 MPH..
LARGE HAIL GREATER THAN 3/4 INCH IN DIAMETER..DEADLY LIGHTNING
AND VERY HEAVY RAIN THAT CAN FLOOD A LOW LYING AREA QUICKLY.


BRITTON 1413Z

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 29, 9:57 PM CDT	Flash Flood Warning	LBF	Colfax, Platte	4 hr
Jun 30, 8:39 AM CDT	Severe Thunderstorm Warning	LBF	Hooker	66 min

Nearby

Severe Thunderstorm Warnings in Nebraska, 1986 Every 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.