An approaching shortwave interacted with a stationary boundary located near the Mason-Dixon Line on May 9th. Strong to severe thunderstorms impacted mainly Preston and Monongalia Counties during the evening hours.
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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 PBZ wrote it up.
An approaching shortwave interacted with a stationary boundary located near the Mason-Dixon Line on May 9th. Strong to severe thunderstorms impacted mainly Preston and Monongalia Counties during the evening hours. Instances of wind damage were reported, and some isolated flooding also occurred due to storms training along the slow-moving boundary. A brief EF0 tornado also occurred in Preston County near Masontown.
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 9, 2:25 PM EST, 3 hours 25 minutes earlier.
Area Forecast Discussion National Weather Service Pittsburgh PA 325 PM EDT Thu May 9 2024 .SYNOPSIS... Strong to severe thunderstorms have the potential to develop near or south of I-70 this afternoon. Cooler conditions are anticipated over the weekend with a shift in the synoptic pattern from the northwest. && .NEAR TERM /THROUGH TONIGHT/... KEY MESSAGES: - There will be a window of opportunity for strong to severe storms to develop south of Pittsburgh this afternoon/evening. - Damaging wind and hail could occur in a few storms. - Urban flooding may also occur in areas of training storms. ------------------------------------------------------------------- The center of low pressure system is currently located in central Indiana at the moment. Based on ground observations across the region, the warm front is situated along I-70. Low- level water vapor depicts pockets of drier air advancing into south Ohio, which is helping break the cloud deck, raise temperatures, and increase the potential for destabilization. As the center of the low ventures east into the Ohio River Valley, wind shear in the southern sector of the low will increase rom the west/southwest. Therefore, with pockets of instability and high vertical wind shear, the potential for organized convection increases south of Pittsburgh late this afternoon and into the early evening. The combination of fast tracking icy cores within storms raises the concern for damaging winds near or south of I-70. With convection racing across the moisture boundary from west to east, there is also a threat for isolated flooding south of Pittsburgh. Urban areas will be vulnerable to flooding with low flash flood guidance. Probability of widespread rainfall totals for counties south of I-70 range from 35% to 60% (with higher values located near Uniontown,PA and Morgantown,WV). However, probabilities will likely increase for a small communicates within this large scale area if rainfall rates range from 0.5 to 0.7 inches per hour. The probability of severe storms decreases with the loss diurnal heating and ongoing convection tainting the environment after 8pm. However, there could be a few storms that could continue to produce lightning. With clouds, convection throughout the day, and cool northeast flow, temperatures will likely trend cooler than average for areas north of I-70; near average for areas south with in the warm sector. && .SHORT TERM /FRIDAY THROUGH SATURDAY NIGHT/... KEY MESSAGES: - Showers chances continue into Friday. - Below average temperatures are expected with northerly flow. - Thunderstorms chances return Saturday afternoon. ------------------------------------------------------------------- Precipitation chances will remain across the region on Friday due the slow progression of the trough over the Mid-Atlantic, slowed down by ridging over the Mississippi River Valley. Probability of higher rainfall amounts (0.25 inches to 0.45 inches) will generally be focused east and southeast of Pittsburgh due to orographic lift. Elsewhere, showers will only amount to less than quarter of an inch. Ridging over eastern Ohio Friday night into early Saturday is expected to decrease precipitation. Temperatures will remain cooler than average under northerly flow. By late morning Saturday, a new fast moving shortwave dives southeast from the Great Lakes and returns showers and isolated thunderstorms to the region. A few storms could be considered strong given high shear and MUCAPE values between 500J/kg to 1000J/kg. && .LONG TERM /SUNDAY THROUGH WEDNESDAY/... KEY MESSAGES: - Cooler temperatures arrive by late week with highs in the 60s this weekend. - Rain and thunderstorms are expected to return Tuesday/Wednesday. - Severe storm potential remains low. ------------------------------------------------------------------- A few light showers may remain along the ridge line early Sunday as a trough exits east. Otherwise, dry and quiet weather return for a majority of the day with building high pressure. Temperatures will be near or slightly below average, depending on have fast the clouds clear from the west. Warmer than average temperatures Monday and will continue into Wednesday as a slow moving low ejects out of the Great Plains and reinforces southwest flow. As high pressure breaks down off the Mid-Atlantic, showers and thunderstorms chances increase Tuesday and Wednesday. Long range models at the moment project a low probability of severe storms given weak shear and instability. && .AVIATION /19Z THURSDAY THROUGH TUESDAY/... Cigs will deteriorate to MVFR, then eventually IFR with rain as a sfc low passes south of the region over the course of the TAF period. TSRA will be possible later in the afternoon/early evening, but will be limited to ports south of KPIT. .Outlook... Restrictions will likely continue through Friday afternoon with lingering low-level moisture and cold advection. && .PBZ WATCHES/WARNINGS/ADVISORIES... PA...None. OH...None. WV...None. && SYNOPSIS...Hefferan NEAR TERM...Hefferan SHORT TERM...Hefferan LONG TERM...Hefferan AVIATION...88
Hazardous Weather Outlook National Weather Service Pittsburgh PA 958 AM EDT Thu May 9 2024 OHZ057>059-068-069-PAZ031-075-076-WVZ003-004-012-021-509>514-101400- Muskingum-Guernsey-Belmont-Noble-Monroe-Greene-Fayette- Higher Elevations of Fayette-Ohio-Marshall-Wetzel-Marion-Monongalia- Ridges of Eastern Monongalia and Northwestern Preston-Preston- Eastern Preston-Western Tucker-Eastern Tucker- 958 AM EDT Thu May 9 2024 This Hazardous Weather Outlook is for east central Ohio, southwest Pennsylvania, and northern West Virginia. .DAY ONE...Today and tonight. Strong storms and possibly a severe storm is possible after 3pm this afternoon. Heavy rainfall at times may lead to minor flooding as well. .DAYS TWO THROUGH SEVEN...Friday through Wednesday. 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>041-048>050-PAZ007>009-013>016-020>022-029-073-074-077-078- WVZ001-002-101400- Tuscarawas-Carroll-Columbiana-Coshocton-Harrison-Jefferson OH-Mercer- Venango-Forest-Lawrence-Butler-Clarion-Jefferson PA-Beaver-Allegheny- Armstrong-Washington-Westmoreland-Higher Elevations of Westmoreland- Indiana-Higher Elevations of Indiana-Hancock-Brooke- 958 AM EDT Thu May 9 2024 This Hazardous Weather Outlook is for east central Ohio, western Pennsylvania, and northern West Virginia. .DAY ONE...Today and tonight. No hazardous weather is expected at this time. .DAYS TWO THROUGH SEVEN...Friday through Wednesday. No hazardous weather is expected at this time. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time. SKH
Preliminary Local Storm Report...Corrected
National Weather Service Pittsburgh PA
103 PM EDT Thu May 09 2024
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0149 AM Tornado 1 ESE Coraopolis Height 40.46N 80.20W
05/08/2024 Allegheny PA NWS Storm Survey
**CORRECTION TO DATE** NWS Storm Survey Team found an
EF1 tornado along Aten Road. Details will be found in a
Public Information Statement.
&&
Corrected remarks
Event Number PBZ2404623
MPKPreliminary Local Storm Report
National Weather Service Pittsburgh PA
206 PM EDT Thu May 09 2024
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
1247 AM Tstm Wnd Dmg Beaver Street Trailer C 40.27N 81.61W
05/08/2024 Tuscarawas OH Law Enforcement
Wires down on Heller Drive.
&&
Event Number PBZ2404628
SKHSpecial Weather Statement
National Weather Service Pittsburgh PA
454 PM EDT Thu May 9 2024
OHZ059-092130-
Belmont OH-
454 PM EDT Thu May 9 2024
...A STRONG THUNDERSTORM WILL IMPACT CENTRAL BELMONT COUNTY THROUGH
530 PM EDT...
At 454 PM EDT, Doppler radar was tracking a strong thunderstorm near
Barnesville, moving east at 20 mph.
HAZARD...Wind gusts up to 40 mph and pea size hail.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects. Minor hail damage to vegetation is
possible.
Locations impacted include...
Moundsville, Martins Ferry, Bellaire, Shadyside, Powhatan Point, Glen
Dale, Bridgeport, Benwood, Bethesda, Brookside, Belmont, Neffs,
Alledonia, and Barkcamp State Park.
This includes the following highways...
Interstate 70 in Ohio between mile markers 220 and 225.
Interstate 70 in West Virginia near mile marker 0.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
&&
LAT...LON 4010 8071 4008 8074 4004 8073 4001 8074
3998 8074 3995 8076 3991 8076 3991 8077
3992 8079 3992 8080 3991 8081 3987 8079
3991 8113 4001 8114
TIME...MOT...LOC 2054Z 266DEG 16KT 3996 8105
MAX HAIL SIZE...0.25 IN
MAX WIND GUST...40 MPH
MilcarekSpecial Weather Statement
National Weather Service Pittsburgh PA
501 PM EDT Thu May 9 2024
OHZ059-068-069-092130-
Monroe OH-Noble OH-Belmont OH-
501 PM EDT Thu May 9 2024
...A STRONG THUNDERSTORM WILL IMPACT NORTHWESTERN MONROE...
SOUTHWESTERN BELMONT AND NORTHEASTERN NOBLE COUNTIES THROUGH 530 PM
EDT...
At 501 PM EDT, Doppler radar was tracking a strong thunderstorm 11
miles southwest of Barnesville, moving east at 20 mph.
HAZARD...Wind gusts up to 40 mph and pea size hail.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects. Minor hail damage to vegetation is
possible.
Locations impacted include...
Beallsville, Jerusalem, Wilson, Somerton, Batesville, Miltonsburg,
and Seneca Lake Park.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
&&
LAT...LON 3992 8142 3996 8103 3978 8103 3981 8142
TIME...MOT...LOC 2101Z 265DEG 16KT 3987 8134
MAX HAIL SIZE...0.25 IN
MAX WIND GUST...40 MPH
MilcarekSpecial Weather Statement
National Weather Service Pittsburgh PA
546 PM EDT Thu May 9 2024
OHZ059-069-WVZ004-092215-
Monroe OH-Belmont OH-Marshall WV-
546 PM EDT Thu May 9 2024
...GUSTY SHOWERS WILL IMPACT NORTHEASTERN MONROE...SOUTHEASTERN
BELMONT AND MARSHALL COUNTIES THROUGH 615 PM EDT...
At 545 PM EDT, Doppler radar was tracking gusty showers 8 miles west
of Powhatan Point, or 9 miles northeast of Woodsfield, moving east at
40 mph.
HAZARD...Wind gusts up to 40 mph and pea size hail.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects. Minor hail damage to vegetation is
possible.
Locations impacted include...
Moundsville, Powhatan Point, Glen Dale, Beallsville, Clarington,
Cameron, Alledonia, Grove Oak, Woodlands, Rocklick, Lynn Camp, Lone
Oak, Glen Easton, Grand Vue Park, and Beelers Station.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
This storm may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.
&&
LAT...LON 3973 8105 3991 8106 3997 8052 3972 8052
3972 8076
TIME...MOT...LOC 2145Z 267DEG 36KT 3983 8096
MAX HAIL SIZE...0.25 IN
MAX WIND GUST...40 MPH
MLBThe Pittsburgh radar (KPBZ), 93 km away, was scanning. The volume nearest the first event began at 22:48 UTC.
6 thunderstorm wind, 3 flash flood, 1 hail, 1 tornado. Local standard time, as filed.
Trees were reported to be downed near Bula.
Several trees were reported to be downed near Cassville.
A tree fell on to a house along Route 7.
Trees were reported to be downed in Westover.
Trees were reported to be downed near US 119.
The entrance to Meadow Ponds Community was flooded. Video provided.
There were a few hardwood trees that were downed at the initial touchdown just off Rohr Road. As the tornado continued eastward it lifted nearly half of the roof off a single family residence on the east side of Rohr Road. It then proceeded down the hill causing scattered downed large branches and uprooted small trees. At the end of the track, a tree fell on a vehicle off of Mountain Run Road. There were downed softwood trees on Mountain Run Road. Estimated maximum wind speed of 85 MPH was recorded.
Six inches of moving water was reported in a Menards parking lot.
Multiple trees were reported down in the area of Bull Run.
The intersection of Earl L Core Road and Summers School Road was closed due to high water.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in West Virginia in 2024Every state in 2024This day in weather historyThe tornado archive for West Virginia, 2024Warnings in West Virginia, May 2024
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: 1180293, 1180295, 1180322, 1180308, 1180310, 1180312, 1180315, 1180333, 1180328, 1180330, 1180332.