Alert archive / North Carolina / Severe Thunderstorm Warnings in 1986
Severe Thunderstorm Warning 87, NWS Raleigh, NC
NWS Raleigh, NC issued this severe thunderstorm warning at Aug 27, 1986, 3:33 PM EDT for Durham County, North Carolina. It was in force for 57 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
- Aug 27, 1986, 3:33 PM EDT (19:33 UTC)
- Expired
- Aug 27, 1986, 4:30 PM EDT
- In force
- 57 min
- Issued by
- NWS Raleigh, NC
- Area
- Whole counties
County Durham County, NC
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 |
|---|---|---|---|
| Aug 27, 3:35 PM EDT | Thunderstorm Wind 0 | Durham, NC | |
| Aug 27, 4:05 PM EDT | Thunderstorm Wind 0 | Durham, NC |
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
Greensboro/Hi Pt, NC (KGSO), launched 12:00Z, 7.6 hours before the alert went out and 92 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
- 585 J/kg
- Mixed-layer CIN
- -63 J/kg
- Mixed-layer LCL
- 749 m above ground
- 0-6 km bulk shear
- 22 kt
- 0-1 km storm-relative helicity
- 85 m²/s²
- 0-3 km storm-relative helicity
- 84 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.5
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KRDU 271933 SVRRDU NCC063-272030- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE RALEIGH NC 333 PM EDT WED AUG 27 1986 THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 430 PM EDT FOR THE FOLLOWING COUNTY OF NORTH CAROLINA... DURHAM AT 325PM...RADAR INDICATED A SEVERE THUNDERSTORM NEAR HILLSBOROUGH. THE STORM WAS MOVING EAST AT AROUND 30 MPH. 3/4 INCH HAIL WAS REPORTED BY AN OBSERVOR IN HILLSBOROUGH. PEOPLE IN THE PATH OF THIS STORM SHOULD BE ALERT FOR LARGE HAIL... DAMAGING WINDS...FREQUENT LIGHTNING AND LOCALLY HEAVY RAIN. LG
What forecasters said that day
The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
In the hours before
Special weather statement, Aug 27, 3:12 PM EDT, 21 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE GREENSBORO NC 310 PM EDT WED AUG 27 1986 ...THUNDERSTORMS STARTING TO DEVELOPE ACROSS THE NORTHWEST PIEDMONT OF NORTH CAROLINA... AT 300 PM RADAR SHOWED HEAVY THUNDERSTORMS IN EASTERN ALMANCE.... SOUTHEAST GUILFORD AND RANDOLPH COUNTIES OF MORTH CAROLINA. THESE THUNDERSTORMS MAY PRODUCE...HEAVY DOWNPOURS...STRONG GUSTY WINDS.. SOME HAIL...FREQUENT LIGHTNING...AS THEY MOVE TO THE EAST AT 25 MPH. PERSONS IN THE NORTHWEST PIEDMONT OF NORTH CAROLINA SHOULD BE ON THE LOOKOUT FOR THREATENING WEATHER CONDITIONS AND SHOULD TAKE SHELTER AS STORMS APPROACH. RJD
The office that day
Everything else NWS Raleigh, NC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 27, 2:49 PM EDT | Severe Thunderstorm Warning | RAH | Orange | 61 min |
| Aug 27, 3:04 PM EDT | Tornado Warning | RAH | Orange | 41 min |
| Aug 27, 4:02 PM EDT | Severe Thunderstorm Warning | RAH | Chatham | 58 min |
| Aug 27, 4:52 PM EDT | Severe Thunderstorm Warning | RAH | Franklin | 68 min |
| Aug 27, 6:06 PM EDT | Severe Thunderstorm Warning | RAH | Johnston | 64 min |
Nearby
Severe Thunderstorm Warnings in North Carolina, 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.