A nearly stationary front remained to the north of the region on July 7th. An upper trough dug across the Great Lakes during the daytime hours as well.
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 nearly stationary front remained to the north of the region on July 7th. An upper trough dug across the Great Lakes during the daytime hours as well. While better upper-level forcing remained to the north, return flow increased between this trough and the tropical system Elsa to the southeast. An abundant amount of moisture and warm air was thus funneled into our region. Deep-layer shear was weak, but enough instability and dry air aloft was present to promote many instances of damaging wind gusts. While storm damage was more severe in Pennsylvania and Ohio, a few instances of tree damage were noted.
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 Jul 7, 9:03 AM EST, 3 hours 27 minutes earlier.
Area Forecast Discussion National Weather Service Pittsburgh PA 1003 AM EDT Wed Jul 7 2021 .SYNOPSIS... Showers and thunderstorms will be possible through Friday with the gradual passage of a low pressure system. Isolated to scattered severe storms may be possible this evening mainly north of Pittsburgh. && .NEAR TERM /THROUGH TONIGHT/... 10am update...No major changes to the near term forecast. Though severe risk highlights have been pulled farther south as any storm that develops could generate damaging wind, the previously discussed warm air and weak shear keeps confidence too low for storm formation (let alone severity) generally south of Pittsburgh. Previous discussion... Warm, humid conditions will continue today as moist southwest flow persists as the region lays in between the southeast ridge and an incoming trough to the west. The combination of increased jet support and a modestly unstable environment will lead to more widespread shower and thunderstorm activity this aftn and eve. Eastern Oh to northwest PA and along with the higher terrain of WV will be the favored locations for convection given proximity to upper jet and orographic lift, respectively. Enough shear and instability appears to be in place for storms to tap into dry air aloft, creating a microburst-like damaging wind threat. However, warm air aloft, potentially too weak of shear, and weak sfc ridging may inhibit strong updraft development to maximize this potential, resulting in a more isolated severe event and potentially reduced storm coverage. This warm air aloft suppression is starting to be picked up by Hi-res models which suppress development from Pittsburgh southwest along the OH/WV border until the overnight period. The loss of heating and near sfc stabilization should diminish the severe threat tonight. However, jet support will further increase with the approaching trough as warm, moist advection continues, with model noting modest elevated instability. As a result, iso/sct showers and thunderstorms should continue overnight. && .SHORT TERM /THURSDAY THROUGH FRIDAY NIGHT/... (Limited) diurnal heating and the approach/passage of a sfc cold front will reinvigorate convection Thursday, with most locations likely seeing rain. Little insolation will minimize instability and mute any severe threat, but continued heavy rainfall may cause issues, especially over locations that previously received heavy rainfall. This threat could be further heightened if the region (notably over southwest PA into northern WV) sees convective enhancement due to the northward movement/position of Tropical Storm Elsa. This will have to be monitored moving forward. Precipitation will taper off Thursday night as the upper trough (and Elsa) move east and weak dry advection develops within brief westerly flow. An additional shortwave will quickly follow Friday and tap into the residual moisture in place to create another round of mostly scattered showers and an isolated thunderstorm. Temperature Friday will be near seasonal averages due to cold advection and only broken sunshine. && .LONG TERM /SATURDAY THROUGH TUESDAY/... A perturbed quasi-zonal flow may result in a series of troughs moving through the upper Ohio River Valley into next week, providing periodic chances for showers and thunderstorms and seasonable temperature. Model to model and run to run differences mean this period is fairly low confidence and patience will be needed before any finer details can be sussed out on actual temperature/precipitation trends, let alone severe/flash flood threats. && .AVIATION /14Z WEDNESDAY THROUGH SUNDAY/... Shower and thunderstorm coverage will increase through the afternoon with the approach of an upper trough, with eastern OH/northwest PA the favored locations for convection. The presence of dry air aloft means any storms that develop could produce brief and gusty wind while the humid environment will support heavy rain that can quickly create IFR visibilities. The one limiting factor to monitor is warm air aloft that may suppress some convection, creating a convective hole from PIT southwest to the OH/WV border. Will maintain thunder mention, but will keep convective window small. While convection will diminish around 00z/02z tonight, the continued presence of the trough and a moist environment means iso/sct showers are likely to continue through the overnight period. Though lightning will be possible, confidence will be too low for any one terminal impact, so avoided inclusion for now. Expected cloud cover in between showers should mitigate any IFR stratus/fog threat, though moisture pooling ahead of an incoming cold front may generate areas of MVFR cigs. The approach and eventual passage of the cold front will reinvigorate storms Thursday, with restrictions likely under any storm. .Outlook... Periodic restrictions will remain possible into Friday as a quick hitting trough returns precipitation chances, before high pressure should bring about VFR conditions Saturday. Periodic rain and restrictions are possible with an active pattern heading into next week. && .PBZ WATCHES/WARNINGS/ADVISORIES... PA...None. OH...None. WV...None. &&
Hazardous Weather Outlook National Weather Service Pittsburgh PA 110 PM EDT Wed Jul 7 2021 OHZ041-PAZ007>009-013>016-020-022-023-081715- Columbiana-Mercer-Venango-Forest-Lawrence-Butler-Clarion- Jefferson PA-Beaver-Armstrong-Indiana- 110 PM EDT Wed Jul 7 2021 This Hazardous Weather Outlook is for east central Ohio, northwest Pennsylvania, southwest Pennsylvania and western Pennsylvania. .DAY ONE...This afternoon and tonight. Isolated to scattered thunderstorms are expected this afternoon and evening, with a few potentially becoming severe and produce damaging wind. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday. Hazardous weather is not expected at this time. .SPOTTER INFORMATION STATEMENT... Weather spotters are encouraged to report significant weather conditions according to Standard Operating Procedures. OHZ039-040-048>050-057>059-068-069-PAZ021-029-031-073>076-WVZ001>004- 012-021-509>514-081715- Tuscarawas-Carroll-Coshocton-Harrison-Jefferson OH-Muskingum- Guernsey-Belmont-Noble-Monroe-Allegheny-Washington-Greene- Westmoreland-Higher Elevations of Westmoreland-Fayette- Higher Elevations of Fayette-Hancock-Brooke-Ohio-Marshall-Wetzel- Marion-Monongalia- Ridges of Eastern Monongalia and Northwestern Preston-Preston- Eastern Preston-Western Tucker-Eastern Tucker- 110 PM EDT Wed Jul 7 2021 This Hazardous Weather Outlook is for east central Ohio, southwest Pennsylvania, western Pennsylvania, northern West Virginia and the northern panhandle of West Virginia. .DAY ONE...This afternoon and tonight. Isolated to scattered thunderstorms may develop this afternoon, with a low chance a storm could become severe and produce damaging wind. .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.
Special Weather Statement National Weather Service Pittsburgh PA 126 PM EDT Wed Jul 7 2021 PAZ031-075-WVZ509-510-071800- Greene-Fayette-Ridges of Eastern Monongalia and Northwestern Preston-Monongalia- 126 PM EDT Wed Jul 7 2021 ...A STRONG THUNDERSTORM CAPABLE OF PRODUCING GUSTY WIND WILL AFFECT SOUTHEASTERN GREENE...SOUTHWESTERN FAYETTE AND NORTHEASTERN MONONGALIA COUNTIES... At 126 PM EDT, a strong thunderstorm was located over Cassville, or near Star City, moving northeast at 15 mph. Wind gusts up to 55 mph are possible with this storm. Locations impacted include... Morgantown... Westover... Star City... Point Marion... Granville... Cassville... Bobtown... Mount Morris... Booth... Cheat Lake... Pentress... Osage... This includes the following highways... Interstate 68 in West Virginia between mile markers 7 and 11. Interstate 79 in Pennsylvania between mile markers 0 and 7. Interstate 79 in West Virginia between mile markers 150 and 160. LAT...LON 3967 8021 3985 8006 3969 7978 3957 8003 TIME...MOT...LOC 1726Z 224DEG 15KT 3966 8005
The Pittsburgh radar (KPBZ), 93 km away, was scanning. The volume nearest the first event began at 17:31 UTC.
4 thunderstorm wind. Local standard time, as filed.
Trees were reported to be downed near Bowlby.
A few trees were reported to be blown down.
A few trees and large limbs were blown down near 20th Street.
Trees were reported to be blown down near Lazelle School Road.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in West Virginia in 2021Every state in 2021This day in weather historyWarnings in West Virginia, July 2021
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: 972124, 972125, 972126, 972127.