Alert archive / Nebraska / Severe Thunderstorm Warnings in 1986

Severe Thunderstorm Warning 21, NWS North Platte, NE

May 7, 1986Blaine County, Nebraska

NWS North Platte, NE issued this severe thunderstorm warning at May 7, 1986, 8:19 PM CDT for Blaine County, Nebraska. It was in force for 56 min.

The area

The counties it named.

The facts

Issued: May 7, 1986, 8:19 PM CDT (01:19 UTC)
Expired: May 7, 1986, 9:15 PM CDT
In force: 56 min
Issued by: NWS North Platte, NE
Area: Whole counties

County Blaine 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 00:00Z, 1.3 hours before the alert went out and 101 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: 2917 J/kg
Mixed-layer CIN: -34 J/kg
Mixed-layer LCL: 1808 m above ground
0-6 km bulk shear: 41 kt
0-1 km storm-relative helicity: 175 m²/s²
0-3 km storm-relative helicity: 258 m²/s²
Significant tornado parameter: 0.6
Supercell composite: 21.1

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KOFK 080119
SVROFK
NEC009-017-149-080215-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NORFOLK NE
819 PM CDT WED MAY 7 1986

THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM 
WARNING EFFECTIVE UNTIL 915 PM CDT FOR PEOPLE IN THE FOLLOWING 
COUNTIES OF

NORTH CENTRAL NEBRASKA...BLAINE...SOUTHEAST BROWN AND SOUTHERN ROCK

AT 815 PM CDT RADAR INDICATED A LINE OF SEVERE THUNDERSTORMS THAT
EXTENDED FROM ALONG THE BROWN AND ROCK COUNTY LINE 30 MILES SOUTH
EAST OF ANISWORTH TO CENTRAL BLAINE COUNTY 50 MILES SOUTH OF
AINSWORTH.  THE STORMS WERE MOVING TO THE NORTHEAST AT 30 MPH.

AT 810 PM CDT 1 INCH HAIL WAS REPORTED AT BREWESTER IN CENTRAL
BLAINE COUNTY.

 THESE STORMS CAN AND OCCASIONALLY DO PRODUCE A TORNADO WITH LITTLE
OR NO WARNING...SO BE ON THE LOOKOUT AND BE PREPARED TO MOVE TO A
PLACE OF SAFETY.

 TORNADO WATCH NUMBER 135 REMAINS IN EFFECT FOR NORTHCNTRAL
 NEBRASKA UNTIL 11 PM CDT.
 BOWMAN 0117Z

The office that day

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

Issued	Product	Office	Counties	Lasted
May 7, 7:18 PM CDT	Severe Thunderstorm Warning	LBF	Brown, Rock	57 min
May 7, 7:18 PM CDT	Severe Thunderstorm Warning	LBF	Blaine	57 min
May 7, 7:51 PM CDT	Severe Thunderstorm Warning	LBF	Knox	39 min
May 7, 8:07 PM CDT	Severe Thunderstorm Warning	LBF	Frontier, Lincoln	68 min
May 7, 8:13 PM CDT	Severe Thunderstorm Warning	LBF	Frontier, Lincoln	47 min
May 7, 8:19 PM CDT	Severe Thunderstorm Warning	LBF	Brown, Rock	56 min
May 7, 8:32 PM CDT	Severe Thunderstorm Warning	LBF	Knox	28 min
May 7, 9:45 PM CDT	Severe Thunderstorm Warning	LBF	Keith, Lincoln	50 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; the sounding from the Mesonet's radiosonde archive.