Alert archive / Nebraska / Severe Thunderstorm Warnings in 1987
Severe Thunderstorm Warning 57, NWS North Platte, NE
NWS North Platte, NE issued this severe thunderstorm warning at Jul 11, 1987, 2:14 AM CDT for Boyd County, Nebraska. It was in force for 31 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
- Jul 11, 1987, 2:14 AM CDT (07:14 UTC)
- Expired
- Jul 11, 1987, 2:45 AM CDT
- In force
- 31 min
- Issued by
- NWS North Platte, NE
- Area
- Whole counties
County Boyd 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 11, 2:20 AM CDT | Thunderstorm Wind 56 | Boyd, 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
Aberdeen, SD (KHON), launched 00:00Z, 7.2 hours before the alert went out and 224 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
- 3304 J/kg
- Mixed-layer CIN
- -7 J/kg
- Mixed-layer LCL
- 1012 m above ground
- 0-6 km bulk shear
- 44 kt
- 0-1 km storm-relative helicity
- 52 m²/s²
- 0-3 km storm-relative helicity
- 66 m²/s²
- Significant tornado parameter
- 1.3
- Supercell composite
- 6.8
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KOFK 110714 SVROFK NEC015-110745- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE NORFOLK NE 214 AM CDT SAT JUL 11 1987 THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 245 AM CDT FOR PEOPLE IN THE FOLLOWING COUNTY OF NORTH CENTRAL NEBRASKA...EASTERN BOYD AT 210 AM CDT SEVERE THUNDERSTORMS WERE INDICATED OVER NORTHERN HOLT COUNTY OF NORTH CENTRAL NEBRASK ABUT 15 TO 20 MILES NORTH OF O NEILL MOVING TO THE NORTHEAST AT AROUND 50 MILES AN HOUR. REMEMBER...SEVERE THUNDERSTORMS CAN PRODUCE DEADLY WINDS IN EXCESS OF 75 MPH...LARGE HAIL...KILLER LIGHTNING...AND TORRENTIAL RAINS THAT CAN QUICKLY FLOOD A LOW LYING AREuA. A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT FOR MOST OF NORTH CENTRAL NEBRASKA UNTIL 5 AM CDT. A SEVERE THUNDERSTORM WARNING IS IN EFFECT FOR NORTHERN HOLT COUNTY UNTIL 230 AM CDT VAN ALLEN 0714Z
The office that day
Everything else NWS North Platte, NE issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 10, 7:08 PM CDT | Severe Thunderstorm Warning | LBF | Cherry | 52 min |
| Jul 10, 8:22 PM CDT | Severe Thunderstorm Warning | LBF | Keya Paha | 68 min |
| Jul 10, 10:33 PM CDT | Severe Thunderstorm Warning | LBF | Grant | 57 min |
| Jul 10, 11:13 PM CDT | Severe Thunderstorm Warning | LBF | Cherry | 57 min |
| Jul 10, 11:44 PM CDT | Severe Thunderstorm Warning | LBF | Hooker | 21 min |
| Jul 10, 11:44 PM CDT | Severe Thunderstorm Warning | LBF | Thomas | 46 min |
| Jul 11, 1:10 AM CDT | Tornado Warning | LBF | Brown, Rock | 35 min |
| Jul 11, 1:34 AM CDT | Severe Thunderstorm Warning | LBF | Holt | 56 min |
Nearby
Severe Thunderstorm Warnings in Nebraska, 1987Every severe thunderstorm warning in 1987
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.