A passing shortwave and modest instability, moisture, and steep lapse rates supported scattered strong to severe storms in the afternoon of the 31st. There were several reports of wind damage , mainly to trees, across the northern West Virginia pan-handle, southwestern Pennsylvania, and an isolated reported in Ohio.
Every event with a place to put it. Tap one for its entry below.
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 PBZ wrote it up.
A passing shortwave and modest instability, moisture, and steep lapse rates supported scattered strong to severe storms in the afternoon of the 31st. There were several reports of wind damage , mainly to trees, across the northern West Virginia pan-handle, southwestern Pennsylvania, and an isolated reported in Ohio.
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 Pittsburgh, PA wrote its last area forecast discussion before the first event at May 31, 12:22 PM EST, 2 hours 33 minutes earlier.
Area Forecast Discussion National Weather Service Pittsburgh PA 122 PM EDT Wed May 31 2017 .SYNOPSIS... Through the weekend, a broad upper-level disturbance will maintain daily chances of showers and thunderstorms save for Thursday. && .NEAR TERM /THROUGH TONIGHT/... Morning showers will affect mainly the southern zones as they translate ewd across WV. Clouds associated with these showers will provide short-lived obstruction to insolation, but conditions on the whole will remain mostly sunny to partly cloudy through early afternoon. As a result of the continued deep mixing, swly wind will become quite gusty at 25-30kt. A narrow plume of lower 50s dewpoints will spread newd from srn Ohio in the wake of the morning showers. Given the continued deep mixing and steep lapse rates, this modest increase in moisture may be sufficient to generate deep, moist convection this afternoon as depicted in many of the hi-res convection- allowing models. Whether a balance of CAPE and shear can be achieved remains to be seen, so a severe threat is highly uncertain. However, a thunderstorm that realizes more-substantial localized instability will be in an environment that should support threats of hail and damaging wind gusts given the low melting level and considerable environmental DCAPE. After any afternoon thunderstorms exit, a quiescent night is expected as wind subsides, sky remains mostly clear and boundary-layer moisture remains steady. This combination should support river valley fog, which has been included in the grids with this forecast. && .SHORT TERM /THURSDAY THROUGH FRIDAY NIGHT/... Benign weather will carry through Thursday night as the surface high transitions east, with limited cloud coverage and temperatures slightly-below normal. Precipitation chances return later on Friday with a crossing shortwave trough. && .LONG TERM /SATURDAY THROUGH TUESDAY/... Not much change needed in the extended as longwave troughing remains the dominant feature through the period, resulting in continued unsettled conditions and below normal temperatures. While precipitation is possible Saturday, late Saturday and through Sunday is the best bet for rain at this time as low pressure crosses the forecast area, with an inch or more of rain possible. GEFS and NAEFS bring a transitory H5 cyclone through Monday into Tuesday. With the cold air aloft and spokes of energy wrapping around the low pressure, showers are possible especially during the daytime and early evening hours. Neither day at this juncture appears like a washout, however abundant low-level moisture will keep clouds more common than sunshine. && .AVIATION /17Z WEDNESDAY THROUGH SUNDAY/... VFR conditions are expected in the mean through the TAF period. However, a frontal boundary is expected to fire off scattered showers and thunderstorms this afternoon into early evening. Any visibility restriction from such storms would be brief, but hail and gusty winds will be possible with the stronger cells. Handled with VCTS for now given the broken coverage/brief duration, and will handle with amendments as appropriate. Outside of storms, wind gusts of 20 to 30 knots out of the southwest will continue this afternoon. Activity ends with sunset and with the front departing. Clearing skies and light winds overnight may lead to another round of many river valley fog. Expect that most terminals will be impacted briefly at most by this, with HLG having the best chance of seeing a restriction. Any fog quickly burns off by 13Z. VFR conditions are then forecast thereafter. .Outlook... Restrictions are possible on Friday with another crossing upper disturbance. && .PBZ WATCHES/WARNINGS/ADVISORIES... MD...None. OH...None. PA...None. WV...None. &&
Hazardous Weather Outlook...UPDATED National Weather Service Pittsburgh PA 353 PM EDT Wed May 31 2017 MDZ001-OHZ039>041-048>050-057>059-068-069-PAZ007>009-013>016-020>023- 029-031-073>076-WVZ001>004-012-021-509>514-012000- Garrett-Tuscarawas-Carroll-Columbiana-Coshocton-Harrison-Jefferson- Muskingum-Guernsey-Belmont-Noble-Monroe-Mercer-Venango-Forest- Lawrence-Butler-Clarion-Beaver-Allegheny-Armstrong-Indiana- Washington-Greene-Westmoreland-Westmoreland Ridges-Fayette- Fayette Ridges-Hancock-Brooke-Ohio-Marshall-Wetzel-Marion-Monongalia- Ridges of Eastern Monongalia and Northwestern Preston-Preston- Eastern Preston-Western Tucker-Eastern Tucker- 353 PM EDT Wed May 31 2017 This Hazardous Weather Outlook is for western Maryland, east central Ohio, northwest Pennsylvania, southwest Pennsylvania, west central Pennsylvania, western Pennsylvania, northern West Virginia and northern panhandle of West Virginia. .DAY ONE...This Afternoon and Tonight. A few severe thunderstorms are possible this afternoon. Storms will be capable of producing damaging wind and large hail. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday. No hazardous weather is expected at this time. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time. Kramar
Special Weather Statement
National Weather Service Pittsburgh PA
242 PM EDT WED MAY 31 2017
OHZ039-048-311915-
Tuscarawas-Coshocton-
242 PM EDT WED MAY 31 2017
...A LINE OF STRONG THUNDERSTORMS CAPABLE OF PRODUCING HAIL AND GUSTY
WIND WILL AFFECT COSHOCTON AND SOUTHERN TUSCARAWAS COUNTIES...
At 242 PM EDT, radar indicated strong thunderstorms were located
along a line extending from near Killbuck to 8 miles north of
Frazeysburg. Movement was east at 30 mph.
Wind gusts up to 55 mph and hail up to the size of nickels are
possible with these storms.
Locations impacted include...
New Philadelphia... Dover...
Coshocton... Newcomerstown...
West Lafayette... Sugarcreek...
Baltic... Midvale...
Warsaw... Port Washington...
Barnhill... Conesville...
This includes Interstate 77 in Ohio between mile markers 64 and 82.
LAT...LON 4027 8220 4045 8202 4044 8168 4052 8167
4050 8132 4022 8160 4022 8167 4015 8167
4016 8209 4018 8219 4024 8218 4024 8220
TIME...MOT...LOC 1842Z 283DEG 28KT 4048 8190 4024 8213Special Weather Statement
National Weather Service Pittsburgh PA
335 PM EDT WED MAY 31 2017
OHZ040-049-312000-
Harrison-Carroll-
335 PM EDT WED MAY 31 2017
...A STRONG THUNDERSTORM CAPABLE OF PRODUCING HAIL AND GUSTY WIND
WILL AFFECT NORTHERN HARRISON AND SOUTHERN CARROLL COUNTIES...
At 335 PM EDT, a strong thunderstorm was located near Dennison, or
near Uhrichsville, moving east at 40 mph.
Wind gusts up to 55 mph and hail up to the size of nickels are
possible with this storm.
Locations impacted include...
Cadiz... Hopedale...
Scio... Jewett...
Amsterdam... Bowerston...
Sherrodsville... Leesville...
Deersville... Kilgore...
Leesville Lake Park... Harlem Springs...
LAT...LON 4051 8127 4053 8092 4047 8092 4047 8094
4043 8094 4042 8086 4028 8088 4031 8127
TIME...MOT...LOC 1935Z 270DEG 35KT 4041 8126PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PITTSBURGH PA
336 PM EDT WED MAY 31 2017
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0315 PM TSTM WND DMG EAST LIVERPOOL 40.63N 80.57W
05/31/2017 COLUMBIANA OH LAW ENFORCEMENT
SEVERAL TREES DOWN ACROSS TOWN
&&
EVENT NUMBER PBZ1701523
KRAMARThe Pittsburgh radar (KPBZ), 10 km away, was scanning. The volume nearest the first event began at 19:53 UTC.
10 thunderstorm wind. Local standard time, as filed.
Local 911 reported a tree down on Nicholson Road.
Local 911 reported a tree down on Kittanning Street.
Local 911 reported a power pole and trees down around Hampton Township.
The public reported a tree down on PJ McArdle Roadway.
Local 911 reported a tree down on wires along Roosevelt Street.
Local 911 reported a large tree limb down on a vehicle.
Local 911 reported wires down along Gun Club Road and a tree down on Bulltown Road.
Local 911 reported a tree down on the Pennsylvania Turnpike.
Local 911 reported a two trees down near Jeannette.
Local 911 reported a tree down on Rayann Drive.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Pennsylvania in 2017Every state in 2017This day in weather historyWarnings in Pennsylvania, May 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: 696479, 696480, 696481, 696482, 696483, 696484, 696485, 696486, 696487, 696488.