Alert archive / North Carolina / Severe Thunderstorm Warnings in 1998
Severe Thunderstorm Warning 47, NWS Raleigh, NC
NWS Raleigh, NC issued this severe thunderstorm warning at Apr 17, 1998, 6:21 PM EDT for Davidson County, North Carolina. 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
- Apr 17, 1998, 6:21 PM EDT (22:21 UTC)
- Expired
- Apr 17, 1998, 7:20 PM EDT
- In force
- 59 min
- Issued by
- NWS Raleigh, NC
- Area
- Whole counties
County Davidson County, NC
The radar
The Roanoke radar (KFCX), 137 km from the middle of the area, began a volume at 22:20 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Apr 17, 6:40 PM EDT | Hail 0.88 | Welcome, NC | |
| Apr 17, 6:50 PM EDT | Hail 0.88 | Thomasville, 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.
The nearest sounding before it
Greensboro/Hi Pt, NC (KGSO), launched 12:00Z, 10.4 hours before the alert went out and 43 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
- 77 J/kg
- Mixed-layer CIN
- -98 J/kg
- Mixed-layer LCL
- 541 m above ground
- 0-6 km bulk shear
- 61 kt
- 0-1 km storm-relative helicity
- 277 m²/s²
- 0-3 km storm-relative helicity
- 274 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KRDU 172221 RRA SVRRDU NCC057-172320- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE RALEIGH NC 621 PM EDT FRI APR 17 1998 THE NATIONAL WEATHER SERVICE IN RALEIGH HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... NORTHERN DAVIDSON COUNTY * UNTIL 720 PM EDT * AT 620 PM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM NEAR MOCKSVILLE IN DAVIE COUNTY ... MOVING EAST AT 20 MPH. * THE SEVERE THUNDERSTORM WILL BE NEAR... REEDY CREEK AROUND 625 PM YADKIN COLLEGE AROUND 625 PM REEDS CROSSROADS AROUND 630 PM LEXINGTON AROUND 640 PM ARCADIA AROUND 625 PM MIDWAY AROUND 625 PM DAMAGING WINDS AND LARGE HAIL ARE LIKELY. GO INSIDE A STURDY BUILDING AND STAY AWAY FROM WINDOWS! JWC
The office that day
Everything else NWS Raleigh, NC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 17, 5:59 PM EDT | Flash Flood Warning | RAH | Forsyth | 3 hr |
| Apr 17, 6:05 PM EDT | Severe Thunderstorm Warning | RAH | Forsyth | 60 min |
| Apr 17, 6:40 PM EDT | Severe Thunderstorm Warning | RAH | Guilford, Randolph | 60 min |
| Apr 17, 6:55 PM EDT | Tornado Warning | RAH | Guilford | 65 min |
| Apr 17, 7:48 PM EDT | Severe Thunderstorm Warning | RAH | Alamance | 47 min |
Nearby
Severe Thunderstorm Warnings in North Carolina, 1998Every severe thunderstorm warning in 1998
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; radar from the NEXRAD Level II archive.