A line of showers and thunderstorms developed in association with an upper level low and associated cold pool aloft. A couple thunderstorms embedded in the line produced isolated wind damage in Guilford County.
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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 line of showers and thunderstorms developed in association with an upper level low and associated cold pool aloft. A couple thunderstorms embedded in the line produced isolated wind damage in Guilford County.
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 13, 3:00 PM EST, 20 minutes earlier.
Area Forecast Discussion National Weather Service Raleigh NC 400 PM EDT Tue Jun 13 2017 .SYNOPSIS... A mid-upper level low now over the southern Appalachians will drift east across VA and NC through Wed. Meanwhile, a backdoor cold front will settle south through the Middle Atlantic states, and into NC by Thu. && .NEAR TERM /THROUGH TONIGHT/... As of 400 PM Tuesday... A mid-upper level low and related cold pool aloft --one characterized by 500 mb temperatures of minus 9-10 C centered over the central Appalachians-- will drift slowly east across wrn NC and VA through tonight. The slow ewd progress of this feature and accompanying weak forcing for ascent, coincident with diurnal heating and removal of CINH and associated moderate (to pockets of strong) destabilization centered over nwrn NC, and the adjacent Foothills and nw Piedmont, has favored the development of scattered, convection that has since merged along common cold pools and propagated into the nw NC Piedmont during the past couple of hours. This activity will continue to pose a risk of strong to locally severe wind gusts as it propagates sewd through an environment characterized by high DCAPE values around 1000 J/kg. While the convection will likely be strongly diurnal in nature and weaken with time and ewd extent through mid-evening, but an isolated shower can't be completely ruled out anywhere overnight, as the upper low drifts overhead. Near persistence lows mostly in the upper 60s to lower 70s. && .SHORT TERM /WEDNESDAY AND WEDNESDAY NIGHT/... As of 345 PM Tuesday... The mid-upper low and associated cold pool aloft now over the central Appalachians will drift east across central NC during the day Wed, then offshore by Wed night. Diurnal heating and and resultant moderate to strong destabilization beneath the cold pool aloft, and erosion or early day CINH, will support the development of scattered, weekly-steered showers and storms by midday to early afternoon. While wind fields will be quite weak, merging of cold pools/outflow, in a high DCAPE environment characterized by ~1000 J/kg, will favor strong to locally severe wind gusts. It will otherwise be hotter than previous days, as both low level thickness values and 850 mb temperatures increase, to around 1425m and 18-19C , respectively - highs generally in the lower to middle 90s. When combined with surface dewpoints in the upper 60s, heat index values in the upper 90s to near 100 degrees will be possible across the Sandhills and srn and central Coastal Plain. A backdoor surface cold front will meanwhile settle south through the middle Atlantic states and into at least the nrn half of central NC by early Thu. Stratus will be favored both in the increasingly humid pre-frontal environment and in the cooler/post-frontal one. Lows in the upper 60s to lower 70s. && .LONG TERM /THURSDAY THROUGH TUESDAY/... As of 256 PM EDT Tuesday... Long term period becomes unsettled as moisture begins to increase across the area midweek, while temps remain near normal, with cloudy skies, in the mid/upper 80s. Backdoor cold front will stall across the northern part of our area Thursday before retreating northward Friday, providing the focusing mechanism for storms. Front position could have impact on temperature gradient across the area. The Southeast will be under the influence of an upper trough or low by the end of the week and through the weekend, with convection mainly scattered and diurnally driven. Cold front will approach the area early next week, as upper level shortwave over the Great Lakes carves out troughing across the eastern US. && .AVIATION /18Z TUESDAY THROUGH SUNDAY/... As of 200 PM Tuesday... Visible satellite imagery depicts deepening cumulus, including some showers and thunderstorms with strong to severe gusty winds, extending from near INT nwwd across the central Appalachians - all beneath a mid-upper level low now drifting ewd across that region. Some of these showers and storms will likely develop sewd across the nw NC Piedmont --including at or around INT/GSO-- through mid- evening. This slow-moving activity will likely dissipate with loss of heating as it drifts toward and probably shy of RDU. Rain-cooled air, wet soil, and west to east clearing of high cloudiness as the mid-upper low moves east, will favor fog and low stratus occurrence around INT and GSO late tonight-early Wed. VFR conditions are expected otherwise and elsewhere through the 18Z TAF period. Outside of convection and associated gustiness, surface winds are expected to remain light (from the ssw or sw) and operationally- insignificant. Outlook: Scattered convection will be possible throughout central NC on Wed, as the mid-upper level low drifts east across our region. IFR-MVFR ceilings are likely to develop by early Thu, particularly on the north/cool side of a backdoor cold front --and associated focus for additional showers and storms-- that will have settled into central NC. While a return to VFR will likely occur by midday- early afternoon Thu, especially at FAY, sub-VFR ceilings and/or visibility restrictions are expected again Thu night as the front lingers overhead or slowly retreats north toward VA. The chance of (mainly diurnal) showers and storms will remain through the weekend. && .RAH WATCHES/WARNINGS/ADVISORIES... None. && SYNOPSIS...MWS NEAR TERM...MWS SHORT TERM...MWS LONG TERM...SEC AVIATION...MWS
Hazardous Weather Outlook National Weather Service Raleigh NC 347 AM EDT Tue Jun 13 2017 NCZ007>011-021>028-038>043-073>078-083>086-088-089-140800- Person-Granville-Vance-Warren-Halifax-Forsyth-Guilford-Alamance- Orange-Durham-Franklin-Nash-Edgecombe-Davidson-Randolph-Chatham-Wake- Johnston-Wilson-Stanly-Montgomery-Moore-Lee-Harnett-Wayne-Anson- Richmond-Scotland-Hoke-Cumberland-Sampson- 347 AM EDT Tue Jun 13 2017 This Hazardous Weather Outlook is for central North Carolina. .DAY ONE...Today and Tonight. No hazardous weather is expected at this time. .DAYS TWO THROUGH SEVEN...Wednesday through Monday. No hazardous weather is expected at this time. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time.
Special Weather Statement
National Weather Service Raleigh NC
319 PM EDT TUE JUN 13 2017
NCZ021-022-038-132015-
Guilford NC-Forsyth NC-Davidson NC-
319 PM EDT TUE JUN 13 2017
...A line of strong thunderstorms will affect portions of western
Guilford...Forsyth and northern Davidson Counties Until 415 PM EDT...
At 318 PM EDT, Doppler radar was tracking a line of strong
thunderstorms along a line extending from Hanging Rock State Park to
King to near Yadkinville. Movement was southeast at 15 mph.
Wind gusts up to 45 mph will be possible with these storms.
Locations impacted include...
Greensboro, Winston-Salem, High Point, Lexington, Thomasville,
Kernersville, Clemmons, Bermuda Run, McLeansville and Lewisville.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Wind gusts as high as 45 mph are capable of knocking down small or
weakened trees and blowing around trash cans, potted plants, lawn
furniture and other light outdoor objects.
&&
LAT...LON 3611 8051 3614 8044 3626 8045 3625 7973
3609 7968 3596 7978 3592 8004 3587 8005
3584 8043 3585 8043 3585 8039 3587 8039
3587 8040 3583 8049 3589 8037 3601 8042
3606 8046 3604 8049 3606 8051
TIME...MOT...LOC 1918Z 306DEG 14KT 3640 8027 3628 8039 3617 8062
26The Roanoke radar (KFCX), 91 km away, was scanning. The volume nearest the first event began at 20:20 UTC.
2 thunderstorm wind. Local standard time, as filed.
A tree was blown down onto power lines, resulting in a fire and numerous power outages in the Stokesdale area.
A few trees were blown down along a swath from west-northwest to north-northeast of Greensboro, including one across Oak Ridge Meadow Road, one across Pineburr Road and one across Kirkpatrick Place.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in North Carolina in 2017Every state in 2017This day in weather historyWarnings in North Carolina, June 2017
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: 710174, 710175.