Alert archive / Nebraska / Severe Thunderstorm Warnings in 1986
Severe Thunderstorm Warning 76, NWS North Platte, NE
NWS North Platte, NE issued this severe thunderstorm warning at Jul 18, 1986, 4:31 PM CDT for Holt County, Rock County, Nebraska. It was in force for 59 min. 2 reports 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
- Jul 18, 1986, 4:31 PM CDT (21:31 UTC)
- Expired
- Jul 18, 1986, 5:30 PM CDT
- In force
- 59 min
- Issued by
- NWS North Platte, NE
- Area
- Whole counties
Counties Holt County, NE, Rock 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 |
|---|---|---|---|
| Jul 18, 4:50 PM CDT | Hail 1.75 | Holt, NE | |
| Jul 18, 5:10 PM CDT | Hail 1.75 | Holt, 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, 9.5 hours before the alert went out and 190 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.
- 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
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KOFK 182131 SVROFK NEC149-089-182230- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE NORFOLK NE 431 PM CDT FRI JUL 18 1986 THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 530 PM CDT FOR PEOPLE IN THE FOLLOWING COUNTIES OF NORTH CENTRAL NEBRASKA...NORTHERN ROCK AND NORTHERN HOLT AT 425PM CDT RADAR INDICATED SEVERE THUNDERSTORMS FROM 25 MILES EAST NORTHEAST OF AINSWORTH TO 50 MILES EAST NORTHEAST OF AINSWORTH ACROSS THE NORTHERN PORTIONS OF ROCK AND HOLT COUNTIES. THE STORMS WERE MOVING TO THE EAST AT 20 MILES AN HOUR. THE SEVERE THUNDERSTORM WARNING FOR KEYA PAHA AND BOYD COUNTIES IN NORTHCENTRAL NEBRASKA HDAS EXPIRED. 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. BOWMAN 2129Z
The office that day
Everything else NWS North Platte, NE issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 18, 3:39 PM CDT | Severe Thunderstorm Warning | LBF | Boyd, Rock | 51 min |
| Jul 18, 3:55 PM CDT | Severe Thunderstorm Warning | LBF | Holt, Keya Paha | 35 min |
| Jul 18, 5:28 PM CDT | Severe Thunderstorm Warning | LBF | Holt | 62 min |
| Jul 18, 6:14 PM CDT | Severe Thunderstorm Warning | LBF | Logan, McPherson | 56 min |
| Jul 18, 6:14 PM CDT | Tornado Warning | LBF | Knox | 26 min |
| Jul 18, 6:43 PM CDT | Tornado Warning | LBF | Knox | 27 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.