A few multi-cell clusters developed ahead of a well-defined, convectively enhanced vorticity maximum that crossed the mountains and moved into the area during the late afternoon and evening. Two of the clusters produced minor wind damage in the form of scattered trees down in Forsyth and Chatham counties.
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Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
The episode as NWS RAH wrote it up.
A few multi-cell clusters developed ahead of a well-defined, convectively enhanced vorticity maximum that crossed the mountains and moved into the area during the late afternoon and evening. Two of the clusters produced minor wind damage in the form of scattered trees down in Forsyth and Chatham counties.
The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Raleigh, NC wrote its last area forecast discussion before the first event at Jun 1, 2:06 PM EST, 2 hours 46 minutes earlier.
Area Forecast Discussion National Weather Service Raleigh NC 306 PM EDT Fri Jun 1 2018 .SYNOPSIS... A moist and unstable air mass will linger across central North Carolina through the much of the weekend. A cold front will move across the region on Sunday night, with a cooler and more stable air mass moving into the region for the beginning of the work week. && .NEAR TERM /UNTIL 6 AM SATURDAY MORNING/... As of 250 PM Friday... The early afternoon surface analysis shows a ridge of high pressure extending from the subtropical Atlantic west into the eastern Gulf of Mexico. A cold front was analyzed across the southeastern Great Lakes and Ohio Valley with a surface trough extending from eastern PA south through eastern VA into the eastern Carolinas. Further aloft, a ridge of high pressure centered over the Bahamas extended north, off the East Coast as a slowly eastward transitioning trough extends from the central Great Lakes to the central TN Valley. GOES-East visible satellite imagery shows a well defined, convectively enhanced vorticity maxima across far eastern TN at 18Z. the cumulus field near and east of this feature has expanded during the past few hours and isolated convection is developing. To the east the air mass across central NC is moist but not as moist as previous days with PW values of 1.6 to 1.8 inches. The surface tough that extends from near Roanoke Rapids southwest to near Florence SC separates dew points in the upper 60s with a few mid 60s in the northern Piedmont with dew points in the lower 70s to the east. MLCAPE values range between about 500 to 1000 J/Kg with mid level lapse rate values between 5.5 and 6 deg C/km. DCAPE values generally range between 600-800 J/kg. The wind field is modest with 0-6km shear values of around 15kts with a westerly flow in the mid levels. Expect convection to fill in and develop into a broken line in the central an northern NC Foothills during the next few hours and will push east into the western Piedmont between and 4 and 8pm. It's unclear how widespread the convective coverage will be with recent CAM runs suggest max intensity and coverage as the storms approach the Triad with the convection gradually decreasing in coverage and intensity during the evening. The main convective threat this afternoon and evening should be from downburst winds enhanced by deep mixed layer and a tendency for storms to organize a bit into linear clusters. Expect mainly dry conditions for the late evening into the overnight, with just a limited chance of a shower as the vort max shears and moves east. Variably cloudy skies are expected overnight with lows around 70. -Blaes && .SHORT TERM /6 AM SATURDAY MORNING THROUGH SATURDAY NIGHT/... As of 305 PM Friday... Forecast for Saturday is complicated by several features that transition east across the region as the upper level trough axis shifts east across the southeast. One embedded short wave trough moves across southern Va and northern NC during the morning into the early afternoon with a second and stronger short wave trough pivoting across VA/NC during the afternoon and evening. The result should be a few showers across the north during the morning int the early afternoon with convection becoming more widespread during the afternoon and evening. The air mass across central NC will be similar to today with afternoon MLCAPE values of around 500 to 1000 J/kg with limited shear. The deep layer flow will be largely be northwesterly to westerly. Given this environment, central NC is only included in general thunder and the threat of severe weather is rather limited. Scattered convection will diminish and shift east during the mid to late evening. Low level thickness values are similar to perhaps a few meters lower than today. Given more cloud cover, highs should be a couple degrees cooler than Friday and range in the 86 to 92 range. Lows on Saturday night will range in the upper 60s to lower 70s. -Blaes && .LONG TERM /SUNDAY THROUGH FRIDAY/... As of 155 PM Friday... Sun/Sun night: This should be our last damp day before a brief respite. PW will be highest Sun over the eastern and particularly the NE CWA, closer to the mid level low over or near the VA coast early Sun. At the surface, a backdoor frontal zone near the E NC/VA border may dip southward into our northern sections, bringing in cooler and more stable air. Expect a chance of rain in the NE in the morning, with chances increasing and expanding over much of the northern and eastern forecast area in the afternoon with heating and subsequent destabilization (with the latter being tempered by early- day clouds in the NE CWA and by downslope flow and lower surface dewpoints across the S/W CWA). Expect highs from the upper 70s NE to near 90 SW. By Sun night, a negatively tilted mid level trough, extending from a low over far W Ontario through the E Great Lakes to the Mid Atlantic region, accompanied by an occluded/cold front at the surface. Models depict a band of showers and storms with this feature, and this activity should sweep across our area Sun evening and early overnight, although how expansive it is will depend on the amplitude of the wave (and hence forcing for ascent) this far south. The surface front will push to our SE by Mon morning, with falling thicknesses to below normal values, supportive of lows in the upper 50s to mid 60s. Mon through Tue: Behind the front, deep NW flow, a stable column, and low PW will result in dry days, with plenty of sunshine and below normal thicknesses. Expect fair skies Mon night into Tue with increasing high clouds ahead of a weak perturbation moving ESE from the mid Miss Valley. Highs from around 80 to the mid 80s both Mon and Tue. Lows Mon night in the upper 50s to lower 60s. Tue night through Fri: The mid level low over W Ontario early in the weekend will wobble and track SE through the St Lawrence Valley and New England through midweek (while potentially prompting development of a nor'easter), before shifting off the Canadian Maritime coastline by Fri. Models suggest that an associated backdoor cold front will approach late Wed before dropping through NC Wed night into Thu morning. While this may occur, the weak low and mid level flow this far south and the density of the surface air mass to our north may not be sufficient to propel the backdoor front cleanly through the area. For now, will have near normal temps for Thu and Fri with a wind shift, and wait to see how later model runs trend with a backdoor frontal passage. Will have chances for showers and storms starting Wed evening ahead of the front, with higher pops Thu and Fri afternoon across the south, assuming the front will be nearby with the potential for passing perturbations dropping SE through the area within NW flow to induce showers/storms. -GIH && .AVIATION /19Z FRIDAY THROUGH WEDNESDAY/... As of 145 PM Friday... Widespread VFR conditions and mainly clear skies across central NC will give way to an increase in SCT-BKN VFR cigs with cumulus clouds from the northwest late this afternoon and evening as an upper level disturbance moves east across the region. Scattered showers and thunderstorms developing across the mountains early this afternoon will push east, reaching the Triad terminals between 20Z and around 00Z. Given the scattered nature of the storms, will include a tempo group for a shower with a MVFR cig/vsby restriction but refrain from including a thunderstorm in the TAF. The convection will weaken as it pushes east with a more limited chance of scattered showers/storms across the FAY and especially the RDU/RWI terminals where any storm chances would occur between 23Z and 04Z. Otherwise, VFR conditions are generally expected through the remainder of the TAR period into early Saturday afternoon with a low probability of an isolated shower. Light southwest to westerly winds at less than 10kts are expected through daybreak Saturday with winds becoming more westerly to northwesterly on Saturday. Looking beyond 18Z Saturday... A continued moist and unstable airmass will continue into Sunday resulting in a continued chance of scattered, mainly afternoon or evening showers and storms. The threat of afternoon and evening storms will decrease during the upcoming work week as a cooler and more stable air mass arrives. There is a potential for a period of low clouds, especially to the northeast of Raleigh on Sunday and perhaps Monday mornings. -Blaes && .RAH WATCHES/WARNINGS/ADVISORIES... None. && SYNOPSIS...BLAES NEAR TERM...BLAES SHORT TERM...BLAES/WSS LONG TERM...HARTFIELD AVIATION...BLAES
Hazardous Weather Outlook National Weather Service Raleigh NC 334 PM EDT Fri Jun 1 2018 NCZ007-021>024-038>040-073>075-083>085-021945- Person-Forsyth-Guilford-Alamance-Orange-Davidson-Randolph-Chatham- Stanly-Montgomery-Moore-Anson-Richmond-Scotland- 334 PM EDT Fri Jun 1 2018 This Hazardous Weather Outlook is for central North Carolina. .DAY ONE...This Afternoon and Tonight. Isolated strong to severe thunderstorms are possible through mid- evening. The main severe weather hazard will be locally damaging winds. .DAYS TWO THROUGH SEVEN...Saturday through Thursday. Hazardous weather is not expected at this time. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time. NCZ008>011-025>028-041>043-076>078-086-088-089-021945- Granville-Vance-Warren-Halifax-Durham-Franklin-Nash-Edgecombe-Wake- Johnston-Wilson-Lee-Harnett-Wayne-Hoke-Cumberland-Sampson- 334 PM EDT Fri Jun 1 2018 This Hazardous Weather Outlook is for central North Carolina. .DAY ONE...This Afternoon and Tonight. Heat indices this afternoon will approach the mid to possibly upper 90s with the hottest heat index values expected in the Sandhills and Southern Coastal Plain. .DAYS TWO THROUGH SEVEN...Saturday through Thursday. Hazardous weather is not expected at this time. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time.
The Roanoke radar (KFCX), 104 km away, was scanning. The volume nearest the first event began at 21:49 UTC.
3 thunderstorm wind. Local standard time, as filed.
A couple of trees were blown down along a swath from mile marker 247 on US-421 to the intersection of Ridge Gate Drive and Arbor Run Drive in Lewisville.
Several trees were blown down along Silk Hope Liberty Road and Siler City Snow Camp Road.
One tree was blown down on Old Wire Road near Aberdeen Road in Laurel Hill.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in North Carolina in 2018Every state in 2018This day in weather historyWarnings in North Carolina, June 2018
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 768894, 768895, 768899.