A warm front lifting northward from Maryland with increased moisture from the Chesapeake Bay led to strong-to-severe thunderstorms across Lancaster and York counties in southern Pennsylvania. A severe thunderstorm tracking from Maryland into southern York County produced isolated wind damage, weakening further north as it become removed from the best lift and moisture.
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.
A warm front lifting northward from Maryland with increased moisture from the Chesapeake Bay led to strong-to-severe thunderstorms across Lancaster and York counties in southern Pennsylvania. A severe thunderstorm tracking from Maryland into southern York County produced isolated wind damage, weakening further north as it become removed from the best lift and moisture.
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 Jun 5, 6:56 PM EST, 24 minutes earlier.
Area Forecast Discussion National Weather Service State College PA 756 PM EDT Wed Jun 5 2024 .SYNOPSIS... *Mostly cloudy and humid into tonight with locally heavy downpours and a few gusty thunderstorms possible, esp S. *Trending slightly warmer and less humid Thursday with risk of soaking showers and storms shifting into eastern PA *Cooler/more comfortable conditions Fri-Sun with a couple of passing showers or a t-storm mainly during the afternoons && .NEAR TERM /UNTIL 6 AM THURSDAY MORNING/... MCV clearly visible in sat and now radar imagery/loops is centered over KCBE at 19Z. This feature is providing lift and decrease stability over the srn tier. The very high PWATs (1.5-1.75") and training/dragging precip possible along the srn tier counties is almost enough for a FF Watch, but the very high FFG is the big negative to posting a watch. We do expect the precip to be heaviest through 8 PM, sliding eastward slowly from it's current position with the positive forcing from the vort max. Clouds could break for a short time this evening/early tonight behind the vort max. The real/main cold front arrives in the W after midnight. Storms over KTOL and central OH will slide this way in advance of the front. That will create more showers/storms. This could cause a renewal of minor flooding problems, esp in the Laurels where the FFG is lowest (1.5-2"/3hrs). The risk for SVR is on the low side, but the shear increases overnight. Mins will hang up in the 60s to near 70 SE with the dewpoints that high. && .SHORT TERM /6 AM THURSDAY MORNING THROUGH FRIDAY NIGHT/... Main cold front should be into the central counties by sunrise Thurs. The threat for heavy rainfall should be just about over then, as the highest PWAT air will be to the east. Left <50 PoPs in the east in the morning. Additional convection is expected, esp in the W) in the aftn as a secondary front moves through and the upper cold pool nears. Thurs night stabilization should diminish/kill most of the precip, but some fog is possible as we cool off to near dewpoints. Maxes Thursday will be similar to today, but humidity should get down to about 50pct for most of the CWA, much less humid. Friday should be more typical of a late-spring day under an upper low. A channel of higher vorticity rolling across the area should make numerous SHRA/TSRA. The showers should spread from NW to SE thru the day/aftn, but might not get into the Lower Susq. Maxes Fri should be much below normal with m60s in the NWrn Alleghenies and nearer to normal with u70s over the SE. && .LONG TERM /SATURDAY THROUGH WEDNESDAY/... Reloading of the mean Glakes/NE U.S. upper trough by a few shortwave troughs dropping Southeast will maintain the chc for mainly diurnal showers/isolated to sctd TSRA through much of the extended period. Current indications are that by the end of the weekend into early next week, the upper tough becomes positively tilted and the low may retrograde slightly and stall over the Great Lakes region, especially considering the additional energy helping to deepen the trough. This will continue the unsettled pattern of diurnally driven showers and thunderstorms through at least Monday afternoon. Long range ensembles currently show the trough lifting after Tuesday morning with lower pops for showers/TSRA as we head into the middle of next week. Temperatures are likely to average somewhat below climatology for early to mid-June, with daily highs in the upper 60s and 70s, and overnight lows in the 50s to lower 60s. && .AVIATION /00Z THURSDAY THROUGH MONDAY/... Deteriorating flying conditions are expected this evening, with showers, isolated thunderstorms and falling cigs ahead of an approaching warm front. Latest HREF prob charts support MVFR cigs becoming widespread this evening, with IFR cigs likely over the higher elevations, especially over Northern PA. Latest guidance indicates the warm front will lift into Southern PA after midnight, resulting in a return to predominantly VFR conditions over that part of the state, while IFR cigs persist over the N Mtns of PA. Improving flying conditions are anticipated late Thursday morning, as a trailing cold front comes through followed by the arrival of a drier southwest flow. Model RH profiles support predominantly VFR conditions Thursday afternoon and evening. However, a few thunderstorms could form on the cold front as it crosses the Lower Susq Valley early Thu afternoon, bringing the chance of a brief vis reduction in vicinity of KMDT/KLNS. Also, latest HREF indicates a brief shower/vis reduction will remain possible across the Allegheny Plateau (KBFD/KJST) through early evening. Outlook... Fri...Slight chance of a brief PM shower/vis reduction, mainly NW Mtns. Sat...AM low cigs possible NW Mtns. Slight chance of PM shower/vis reduction NW Mtns. Sun...Slight chance of a brief PM shower/vis reduction, mainly NW Mtns. && .CTP WATCHES/WARNINGS/ADVISORIES... None. && SYNOPSIS...Steinbugl NEAR TERM...Dangelo SHORT TERM...Dangelo LONG TERM...Fitzgerald/Bowen AVIATION...Fitzgerald/Tyburski
Hazardous Weather Outlook National Weather Service State College PA 311 PM EDT Wed Jun 5 2024 PAZ006-011-012-017>019-027-028-037-041-042-045-046-049>053-056>059- 061915- Potter-Cameron-Northern Clinton-Clearfield-Northern Centre- Southern Centre-Mifflin-Juniata-Tioga-Northern Lycoming-Sullivan- Southern Clinton-Southern Lycoming-Union-Snyder-Montour- Northumberland-Columbia-Perry-Dauphin-Schuylkill-Lebanon- 311 PM EDT Wed Jun 5 2024 This Hazardous Weather Outlook is for central Pennsylvania. .DAY ONE...This afternoon and tonight. The probability for widespread hazardous weather is low. .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. PAZ004-005-010-061915- Warren-McKean-Elk- 311 PM EDT Wed Jun 5 2024 This Hazardous Weather Outlook is for central Pennsylvania. .DAY ONE...This afternoon and tonight. Strong thunderstorms with gusty winds are possible this afternoon. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday. The probability for widespread hazardous weather is low. .SPOTTER INFORMATION STATEMENT... Spotters are encouraged to report significant hazardous weather. PAZ024>026-033>036-063>066-061915- Cambria-Blair-Huntingdon-Somerset-Bedford-Fulton-Franklin-Cumberland- Adams-York-Lancaster- 311 PM EDT Wed Jun 5 2024 This Hazardous Weather Outlook is for central Pennsylvania. .DAY ONE...This afternoon and tonight. Rounds of locally heavy showers and thunderstorms will likely impact the region and result in an isolated to scattered flash flood risk. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday. The probability for widespread hazardous weather is low. .SPOTTER INFORMATION STATEMENT... Spotters are encouraged to report significant hazardous weather.
Special Weather Statement National Weather Service State College PA 319 PM EDT Wed Jun 5 2024 PAZ034>036-063>065-052330- Bedford-Fulton-Franklin-Cumberland-Adams-York- 319 PM EDT Wed Jun 5 2024 ...HEAVY RAIN EXPECTED... A cluster of showers and thunderstorms will crawl along the Maryland border through 6 PM. The area between the Turnpike and the Maryland line is the most likely to see short periods of torrential rain. The rain could be intense at times, with rainfall rates near 2 inches per hour. Rainfall rates like this could lead to minor flooding, especially in urban areas. Dangelo
Special Weather Statement
National Weather Service State College PA
632 PM EDT Wed Jun 5 2024
PAZ057-065-066-052330-
Lancaster PA-York PA-Dauphin PA-
632 PM EDT Wed Jun 5 2024
...STRONG THUNDERSTORMS WILL IMPACT WESTERN LANCASTER...SOUTHEASTERN
DAUPHIN AND YORK COUNTIES THROUGH 730 PM EDT...
At 632 PM EDT, Doppler radar was tracking strong thunderstorms along
a line extending from Weigelstown to near Dallastown to 12 miles
north of Cockeysville. Movement was northeast at 20 mph.
HAZARD...Wind gusts up to 50 mph.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects.
Locations impacted include...
York, Weigelstown, Elizabethtown, Columbia, Middletown, Millersville,
Mount Joy, Red Lion, Steelton, Spry, Dallastown, Shiloh, East York,
Stonybrook-Wilshire, West York, Salunga-Landisville, Maytown,
Shrewsbury, Codorus, and Grantley.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
Very heavy rainfall is also occurring with these storms and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.
Persons in campgrounds should consider seeking sturdy shelter until
these storms pass.
&&
LAT...LON 3975 7685 4000 7695 4026 7679 4023 7658
4020 7657 4021 7653 3974 7611 3974 7612
3973 7611 3972 7614 3972 7681
TIME...MOT...LOC 2232Z 228DEG 17KT 3997 7683 3980 7667 3966 7658
MAX HAIL SIZE...0.00 IN
MAX WIND GUST...50 MPH
LambertSpecial Weather Statement
National Weather Service State College PA
741 PM EDT Wed Jun 5 2024
PAZ064-065-060000-
York PA-Adams PA-
741 PM EDT Wed Jun 5 2024
...A HEAVY SHOWER WITH GUSTY WINDS WILL IMPACT SOUTHEASTERN ADAMS
AND SOUTHWESTERN YORK COUNTIES THROUGH 800 PM EDT...
At 740 PM EDT, Doppler radar was tracking a heavy shower with gusty
winds over Parkville, moving northeast at 20 mph.
HAZARD...Wind gusts up to 50 mph.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects
Locations impacted include...
Hanover, Parkville, and Pennville.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
&&
LAT...LON 3972 7703 3976 7706 3984 7692 3974 7688
TIME...MOT...LOC 2340Z 239DEG 18KT 3975 7700
MAX HAIL SIZE...0.00 IN
MAX WIND GUST...<30 MPH
KFSpecial Weather Statement
National Weather Service State College PA
759 PM EDT Wed Jun 5 2024
PAZ065-060045-
York PA-
759 PM EDT Wed Jun 5 2024
...A STRONG THUNDERSTORM WILL IMPACT SOUTHEASTERN YORK COUNTY THROUGH
845 PM EDT...
At 759 PM EDT, Doppler radar was tracking a strong thunderstorm near
Parkville, moving northeast at 30 mph.
HAZARD...Wind gusts up to 50 mph.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects.
Locations impacted include...
Red Lion, Dallastown, Shrewsbury, Stewartstown, Glen Rock, Windsor,
Cross Roads, Railroad, Brogue, Susquehanna Trails, Loganville, East
Prospect, Winterstown, Felton, Fawn Grove, Glenville, and Airville.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
Very heavy rainfall is also occurring with this storm and may lead to
localized flooding. Do not drive your vehicle through flooded
roadways.
To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
office in State College PA.
Persons in campgrounds should consider seeking sturdy shelter until
this storm passes.
&&
LAT...LON 3973 7690 3998 7652 3973 7633 3972 7639
3972 7689
TIME...MOT...LOC 2359Z 235DEG 24KT 3971 7680
MAX HAIL SIZE...0.00 IN
MAX WIND GUST...50 MPH
LambertThe Sterling radar (KLWX), 116 km away, was scanning. The volume nearest the first event began at 00:20 UTC.
1 thunderstorm wind. Local standard time, as filed.
A severe thunderstorm producing winds estimated near 60 mph knocked down trees and a fence southeast of Stewartstown.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Pennsylvania in 2024Every state in 2024This day in weather historyWarnings in Pennsylvania, June 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: 1193247.