Widely scattered showers and storms develop-ed in an unseasonably warm and humid airmass during the afternoon of September 11, 2019. A few of these storms produced wind damage, likely from water-loaded downbursts.
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 CTP wrote it up.
Widely scattered showers and storms develop-ed in an unseasonably warm and humid airmass during the afternoon of September 11, 2019. A few of these storms produced wind damage, likely from water-loaded downbursts.
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 State College, PA wrote its last area forecast discussion before the first event at Sep 11, 2:52 PM EST, 19 minutes earlier.
Area Forecast Discussion National Weather Service State College PA 352 PM EDT Wed Sep 11 2019 .SYNOPSIS... A frontal system will approach the region this evening. Ahead of it will be muggy conditions with a change of showers and thunderstorms. The front will then stall along or just south of the Maryland border. Another frontal system will weaken as it moves into the area Saturday. && .NEAR TERM /UNTIL 6 AM THURSDAY MORNING/... Warm and muggy conditions this afternoon with radar showing the first signs of convection developing over western areas of the region this afternoon. Will keep pops in the forecast through the period. Later tonight convection currently over the Great Lakes will approach the NW zones. Look for a muggy night with temperatures well above average. && .SHORT TERM /6 AM THURSDAY MORNING THROUGH THURSDAY NIGHT/... Frontal system will become stationary close to the MD border on Thursday. With easterly flow look for a good bit of cloud cover and cooler conditions then today. Will also keep some pops in the forecast, especially SE zones where low level moisutre is greatest. && .LONG TERM /FRIDAY THROUGH WEDNESDAY/... Models agree in building the eastern ridge with 5900m H5 heights moving into PA Thu night and Fri. Despite the warm bubble pushing in aloft, I have Fri as the coolest day of the next several with the big high to our NE keeping us in a cool ESE flow with plenty of clouds around. A new storm system will lift well to our west by the weekend, with the trailing cold front weakening as it encounters high heights over the eastern U.S. later Fri into Sat. The best chances for showers/thunderstorms will be over the western CWA. Right now it looks like the second half of Saturday will be drier than the first. Medium range guidance keeps us pretty close to the southern edge of the westerlies which casts doubt on the potential for rain through the extended. I chose a more optimistic precip forecast given the expectations of rather high heights aloft, suggesting the potential for rain will stay on the scattered disorganized side, too early to be specific about. A potentially interesting situation is hinted at next week with the upper high parked over the SE US. A wave in the Bahamas is brought under this ridge into the eastern Gulf of Mexico, with the ECMWF/GFS/Canadian all remarkably close in bringing a possible tropical cyclone toward the NE gulf states perhaps as early as later Monday. By the middle of next week there are hints that whatever moves ashore could be heading north up the Appalachians toward the OH Valley or NERN US, or at least a stream of deeper tropical moisture advecting up this way. && .AVIATION /20Z WEDNESDAY THROUGH MONDAY/... VFR conditions outside any convection this afternoon. Periods of MVFR to IFR in SHRA and TSRA at southern TAF sites are possible this afternoon. CIGS will lower overnight into Thursday. .Outlook... Thu...AM low cigs possible NW Mtns. Isold PM tsra impacts possible southern Pa. Fri-Sat...Low cigs possible, mainly in the morning. Isolated aftn SHRA poss. Sun...AM valley fog poss, otherwise no sig wx. && .CTP WATCHES/WARNINGS/ADVISORIES... None. && SYNOPSIS...Ross NEAR TERM...Ross SHORT TERM...Ross/La Corte LONG TERM...La Corte/RXR AVIATION...Ross
Hazardous Weather Outlook National Weather Service State College PA 502 AM EDT Wed Sep 11 2019 PAZ004>006-010>012-017>019-024>028-033>037-041-042-045-046-049>053- 056>059-063>066-120915- Warren-McKean-Potter-Elk-Cameron-Northern Clinton-Clearfield- Northern Centre-Southern Centre-Cambria-Blair-Huntingdon-Mifflin- Juniata-Somerset-Bedford-Fulton-Franklin-Tioga-Northern Lycoming- Sullivan-Southern Clinton-Southern Lycoming-Union-Snyder-Montour- Northumberland-Columbia-Perry-Dauphin-Schuylkill-Lebanon-Cumberland- Adams-York-Lancaster- 502 AM EDT Wed Sep 11 2019 This Hazardous Weather Outlook is for central Pennsylvania. .DAY ONE...Today and tonight. There is a Marginal Risk of severe thunderstorms today. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday. The probability for widespread hazardous weather is low. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time.
The State College radar (KCCX), 88 km away, was scanning. The volume nearest the first event began at 20:11 UTC.
8 thunderstorm wind. Local standard time, as filed.
A severe thunderstorm producing winds estimated near 60 mph knocked down trees and wires west of Lewisburg.
A severe thunderstorm producing winds estimated near 60 mph knocked down trees and wires in Mount Carmel.
A severe thunderstorm producing winds estimated near 60 mph knocked down trees along Plank Road in Jackson Township.
A severe thunderstorm producing winds estimated near 60 mph knocked down tress along Fords Corner Road and Admiral Perry Highway (Route 22) in Jackson Township.
A severe thunderstorm producing winds estimated near 60 mph knocked down trees along Pike Road in Jackson Township.
A severe thunderstorm producing winds estimated near 60 mph knocked down trees and wires in Nanty Glo.
A severe thunderstorm producing winds estimated near 60 mph knocked down trees along Juniata Gap Road in Logan Township.
A severe thunderstorm producing winds estimated near 60 mph knocked down several trees in Altoona along 29th Street and 5th Avenue.
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, September 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: 855157, 855158, 855159, 855160, 855161, 855162, 855163, 855164.