An upper level short wave moved through portions of Northeast Pennsylvania during the afternoon of the 18th. This sparked severe thunderstorms across the area.
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 BGM wrote it up.
An upper level short wave moved through portions of Northeast Pennsylvania during the afternoon of the 18th. This sparked severe thunderstorms across the area.
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 Binghamton, NY wrote its last area forecast discussion before the first event at Aug 18, 2:28 PM EST, 3 minutes earlier.
Area Forecast Discussion National Weather Service Binghamton NY 328 PM EDT Sun Aug 18 2019 .SYNOPSIS... Southerly winds will pull hot and humid air into NY and PA on Monday with thunderstorms possible again during the afternoon. However, storms will be mostly diurnally driven on Monday with the lack of any significant forcing. More showers and thunderstorms are expected Tuesday and especially Wednesday as as a strong cold front pushes through Wednesday afternoon through Wednesday night. Surface high pressure and cool conditions for the end of the week. && .NEAR TERM /THROUGH MONDAY NIGHT/... More widespread thunderstorms developing across the region today as a short wave crosses. Some storms could severe, as CAPE values top out above 1500 J/kg and 0-6km bulk shear of 30 to 35 knots. There is also a threat for flash flooding into this evening, with forecast soundings showing PWATs topping out over 1.75" and short Corfidi vectors indicate a good possibility for back building cells/training. Southwest return flow pushes hot and humid air into NY and PA for Monday. Temperatures will rise to between 85 and 90 degrees across the Twin Tiers with heat indices possibly reaching the mid-90s. Another round of thunderstorms is likely during the afternoon peak heating, but any perturbations pushing through the westerly zonal flow aloft tomorrow appear weak, so forcing will be quite limited. && .SHORT TERM /TUESDAY THROUGH TUESDAY NIGHT/... Surface high pressure pushes over the NE U.S. with upper trough starting to dip down from Ontario Tuesday evening. Highest chances for thunderstorms will be across the southern forecast area during max heating, but rain chances will depend on positioning of the high. Euro keeps most of the region dry, with most rainfall to the south of the area. Tend to lean more towards the Euro solution as the GFS seems to be digging upper trough too quickly into the region Tuesday afternoon. && .LONG TERM /WEDNESDAY THROUGH SUNDAY/... No major changes made to the long term forecast with cooler high pressure pushing into the region towards the end of the week after a cold front passes Wednesday into Thursday. 345 AM Update... Warmth and humidity sneak back into the area one more time Wednesday, in southwest flow ahead of an approaching cold front. This will provide fuel for a likely batch of thunderstorms as the front passes through sometime in the late Wednesday- Wednesday night time frame. Some potential for stronger storms from higher shear values but details will be sorted out with more confidence in coming days. It would not be unheard of for a pre-frontal trough to complicate the set-up as often happens in our region. There is still at least a small chance for lingering convection Thursday, but most model guidance has post-frontal cool and dry air advection quickly getting underway which will lead to a quiet period lasting right into next weekend. Previous discussion... Used National Blend of Models (NBM) as a starting point for this period. All synoptic models show a large upper trough building into the northeast U.S by Friday with a large canadian high pressure following the trough. This trough will push a cold front through the region from Wednesday night to Thursday night depending on which model you look at. So used the blend to populate the POPs in this time period. All synoptic models and the NBM agree that cooler and drier air covers the region for Friday and Saturday so have POPs less than 15 percent both days. && .AVIATION /19Z SUNDAY THROUGH FRIDAY/... New day, same story...showers and thunderstorms will spread across the region this afternoon and evening and should dissipate after sunset. Any storm could certainly bring IFR restrictions, but will have to amend as necessary if any site is to see a direct hit. Forecast confidence is low for overnight and into early Monday morning. Some model guidance is bringing in mid to upper level cloud cover and that should be enough to hinder fog development. However, if any site sees significant rainfall from thunderstorms today, IFR fog may certainly develop, even with cloud cover overnight. Outlook... Monday afternoon to Thursday...Restrictions possible in showers and storms. && .BGM WATCHES/WARNINGS/ADVISORIES... PA...None. NY...None. && SYNOPSIS...MPK NEAR TERM...MPK SHORT TERM...MPK/MDP LONG TERM...MPK/MDP AVIATION...MPK
Hazardous Weather Outlook National Weather Service Binghamton NY 329 PM EDT Sun Aug 18 2019 NYZ009-015>018-022>025-036-037-044>046-055>057-062-PAZ038>040-043- 044-047-048-072-191930- Northern Oneida-Yates-Seneca-Southern Cayuga-Onondaga-Steuben- Schuyler-Chemung-Tompkins-Madison-Southern Oneida-Cortland-Chenango- Otsego-Tioga-Broome-Delaware-Sullivan-Bradford-Susquehanna- Northern Wayne-Wyoming-Lackawanna-Luzerne-Pike-Southern Wayne- 329 PM EDT Sun Aug 18 2019 This Hazardous Weather Outlook is for central New York and northeast Pennsylvania. .DAY ONE...This afternoon and tonight. A marginal risk for severe thunderstorms exists this afternoon and evening. A few thunderstorms will produce very heavy downpours and gusty winds. .DAYS TWO THROUGH SEVEN...Monday through Saturday. ...POTENTIAL FOR HEAT INDICES IN THE 90S MONDAY... Temperatures will approach 90 degrees in many areas on Monday and combine with high humidity to produce heat indices in the 90s. .SPOTTER INFORMATION STATEMENT... Spotter activation may be needed.
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BINGHAMTON NY
301 PM EDT SUN AUG 18 2019
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0301 PM TSTM WND DMG SPENCER 42.22N 76.49W
08/18/2019 TIOGA NY 911 CALL CENTER
TREES DOWN RT 34
&&
HLCPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BINGHAMTON NY
309 PM EDT SUN AUG 18 2019
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0256 PM HAIL SPENCER 42.22N 76.49W
08/18/2019 E1.00 INCH TIOGA NY SOCIAL MEDIA
&&
HLCSpecial Weather Statement
National Weather Service Binghamton NY
309 PM EDT Sun Aug 18 2019
NYZ009-037-181945-
Southern Oneida NY-Northern Oneida NY-
309 PM EDT Sun Aug 18 2019
...STRONG THUNDERSTORM WILL AFFECT...EAST CENTRAL ONEIDA COUNTY UNTIL
345 PM EDT...
At 309 PM EDT, Doppler radar was tracking a strong thunderstorm over
Floyd, or near Rome, moving east at 25 mph.
Half inch hail and strong wind gusts will be possible with this
storm.
Locations impacted include...
Rome, Westmoreland, Trenton, Deerfield, Floyd, Whitesboro, New York
Mills, Yorkville, Oriskany and Steuben.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.
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 4333 7508 4330 7515 4326 7516 4325 7515
4326 7514 4324 7512 4323 7508 4322 7507
4310 7518 4311 7548 4329 7550 4335 7508
TIME...MOT...LOC 1909Z 265DEG 21KT 4321 7539
DGMPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BINGHAMTON NY
322 PM EDT SUN AUG 18 2019
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0310 PM TSTM WND DMG WEST CANDOR 42.22N 76.42W
08/18/2019 TIOGA NY 911 CALL CENTER
NUMEROUS TREES DOWN ALONG STATE ROUTE 96.
&&
BJGPRELIMINARY LOCAL STORM REPORT...CORRECTED
NATIONAL WEATHER SERVICE BINGHAMTON NY
325 PM EDT SUN AUG 18 2019
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0230 PM HAIL 3 SSW CAYUTA 42.25N 76.73W
08/18/2019 M1.00 INCH SCHUYLER NY SOCIAL MEDIA
&&
CORRECTED EVENT TIME...LOCATION
BJGPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BINGHAMTON NY
327 PM EDT SUN AUG 18 2019
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0300 PM TSTM WND DMG 1 S MARCELLUS 42.97N 76.34W
08/18/2019 ONONDAGA NY SOCIAL MEDIA
TREES AND WIRES DOWN RT 20
&&
HLCThe Binghamton radar (KBGM), 50 km away, was scanning. The volume nearest the first event began at 19:30 UTC.
9 thunderstorm wind, 1 lightning. Local standard time, as filed.
Strong thunderstorm winds brought down trees and wires along Lincoln Street.
Strong thunderstorm winds brought down trees and wires on Riverside Drive.
Strong thunderstorm winds brought down several trees and wires in the Athens area.
Lightning from a thunderstorm struck a house, causing a fire near 301 North River Street.
Strong thunderstorm winds brought down trees and wires along North Rome Road.
Strong thunderstorm winds brought down a tree and wires near Blue Ridge School.
Strong thunderstorm winds brought down a tree and wires near Randolph Street and Maple Drive.
Strong thunderstorm winds brought down a tree and wires across South Main Street.
Strong thunderstorm winds brought down a tree, blocking Route 11.
Strong thunderstorm winds brought down trees, one on a vehicle.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Pennsylvania in 2019Every state in 2019This day in weather historyWarnings in Pennsylvania, August 2019
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: 853801, 853802, 853803, 853804, 853805, 853808, 853806, 853807, 853809, 853810.