Flash Flood and Hail in Pennsylvania, June 4, 2020

Name: Flash Flood and Hail in Pennsylvania, June 4, 2020
Start: 2020-06-04T14:00
End: 2020-06-04T20:15
Location: Pennsylvania

June 4, 2020 · NWS CTP · 54 events in 15 counties and zones

Where it happened

Every event with a place to put it. Tap one for its entry below.

Tornadoes
Tropical storms and surge
Floods
Wind
Hail
Winter weather
Heat and drought
Cold
Fire, smoke and dust
Marine and coastal
Other

Open the live radar over this ground

The toll

Deaths: 0
Injuries: 0
Property damage: $163,000
Crop damage: None recorded
Events: 54

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.

What happened

The episode as NWS CTP wrote it up.

Numerous showers and thunderstorms impacted central Pennsylvania on June 4, 2020. Individual cells formed over the central mountains during the afternoon hours, with some displaying supercellular nature. Splitting cells were observed, and there were numerous hail and damaging wind reports. This activity continued into the evening hours, while a separate, diminishing convective line of storms pushed into central Pennsylvania from the west.

One Flash Flood was reported during the evening in Schuylkill County.

What forecasters said that day

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 4, 11:10 AM EST, 2 hours 50 minutes earlier.

Area forecast discussion, Jun 4, 11:10 AM EST, 2 hours 50 minutes before

Area Forecast Discussion
National Weather Service State College PA
1210 PM EDT Thu Jun 4 2020

.SYNOPSIS...
Warm and humid conditions will continue this afternoon into
Saturday with isolated to scattered afternoon thunderstorms.
Cooler and less humid air will arrive Saturday night and promote
pleasant and dry weather Sunday through Tuesday. Expect
temperatures and humidity levels to trend higher into midweek
ahead of the next frontal system.

&&

.NEAR TERM /THROUGH TONIGHT/...
ML cape is still under 500 J/KG areawide this midday hour, and
the combination of an extensive high cloud shield across central
and northern PA, and notable sfc ridging will will hold off any
significant/deep convection for the next several hours across
much of the region. The exception will be across the Laurel
highlands and Lower Susq Valley where high level heating and a
weak trough/channeling of some mid 60 dewpoint air north from
the Chesapeake respectively may fire off convection there first
around 18Z.

MLCAPE is expected to increase to the 1000 to 1500 J/kg range
across south-central PA during the mid to late afternoon.
Storms are expected to develop over the higher terrain of the
Laurels, and along lee trough as the boundary layer
destabilizes. Vertical shear will remain weak, but 25-35 kt deep
layer flow will support storms spreading east off the higher
terrain, possibly evolving into loosely organized multicell
clusters capable of strong to damaging water-loaded downburst
wind gusts. SPC has increased the risk level up one notch to
SLGT (2 out of 5) from the southern Alleghenies into the lower
Susquehanna Valley. Tried to convey via DSS briefing and social
media that the overall risk level and expected coverage of
severe wx should be lower/more isolated than yesterday.

Scattered storms may evolve slowly to the east and train as the
flow becomes aligned with quasi-stationary front draped over
CPA. WPC expanded the D1 MRGL ERO to cover the entire area with
00Z HREF mean showing spotty 1-2" amounts. This rainfall could
produce some isolated flooding particularly in urban areas, but
the overall risk of FF is low especially given 14-day rainfall
departures that are generally 25-50% of normal.

Isolated to scattered convection will fade into early tonight
with mostly cloudy skies into Friday morning. Max/min temps
will be above average with the largest departure from normal in
lows tonight.

&&

.SHORT TERM /FRIDAY THROUGH SATURDAY NIGHT/...
Warm and humid conditions continue on Friday with isolated to
scattered aftn storms expected to form again in weakly forced
environment along the terrain/lee trough axis and drift slowly
east/southeast. 00Z HREF mean shows PWs climbing to 1.75 inches
over parts of south central/southeast PA with 1000-2000 J/kg of
MUCAPE expected during peak heating. The main threat will be
locally heavy rain as pulse storms become nearly stationary.
Given recent rainfall departures, an isolated FF risk would be
confined mainly to the more vulnerable/urban areas where heavy
rain rates may occur. Expect convective coverage to diminish
again into Friday night.

An upper trough over Ontario and Quebec will deepen across the
Northeast and Mid-Atlantic vicinity on Saturday. A moist boundary
layer will be in place as a cold front moves southeast across
the region during the morning and early afternoon. The SPC D3
outlook does not even have the area in general tstm risk so its
looking like mainly passing showers with fropa early Saturday.

Cooler and drier/less humid air will arrive in the wake of the
front by Saturday night.

&&

.LONG TERM /SUNDAY THROUGH WEDNESDAY/...
Pleasant and comfortable weather expected Sunday through
Tuesday with a mix of sun/clouds and low humidity.

We should see a warming trend heading into the middle of next
week, as the remnants of TS Cristobal move up the MS valley and
help build an upper-level ridge over the eastern United States.

&&

.AVIATION /16Z THURSDAY THROUGH MONDAY/...
Focus this afternoon will be on developing showers and
thunderstorms, as the stalled front over southern Pa lifts
north. Latest HREFV3 indicates scattered thunderstorms will form
around noon in vicinity of KJST/KAOO and spread into the rest
of central Pa by mid afternoon. Brief vis reductions and
stronger wind gusts are possible with any storms.

Light wind and associated radiational cooling may promote
patchy fog late this evening, mainly in those spots that receive
rain this afternoon.

Outlook...

Fri...AM low cigs possible N Mtns. Scattered PM tsra impacts.

Sat...AM low cigs possible W Mtns.

Sun-Mon...No sig wx expected.

&&

.CTP WATCHES/WARNINGS/ADVISORIES...
None.

&&

SYNOPSIS...Lambert/Steinbugl
NEAR TERM...Lambert/Steinbugl
SHORT TERM...Steinbugl
LONG TERM...Lambert/Evanego
AVIATION...Fitzgerald

Hazardous weather outlook, Jun 4, 1:34 PM EST, 26 minutes before

Hazardous Weather Outlook
National Weather Service State College PA
234 PM EDT Thu Jun 4 2020

PAZ004>006-037-051845-
Warren-McKean-Potter-Tioga-
234 PM EDT Thu Jun 4 2020

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...Friday through Wednesday.

No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

PAZ042-051845-
Sullivan-
234 PM EDT Thu Jun 4 2020

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...Friday through Wednesday.

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

PAZ010>012-017>019-024-025-033-041-045-046-049-051-053-051845-
Elk-Cameron-Northern Clinton-Clearfield-Northern Centre-
Southern Centre-Cambria-Blair-Somerset-Northern Lycoming-
Southern Clinton-Southern Lycoming-Union-Montour-Columbia-
234 PM EDT Thu Jun 4 2020

...SEVERE THUNDERSTORM WATCH 250 IN EFFECT UNTIL 10 PM EDT THIS
EVENING...

This Hazardous Weather Outlook is for central Pennsylvania.

.DAY ONE...This afternoon and tonight.

Please listen to NOAA Weather Radio or go to
weather.gov/StateCollege on the internet for more
information about the following hazards.

   Severe Thunderstorm Watch.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

PAZ026>028-034>036-050-052-056>059-063>066-051845-
Huntingdon-Mifflin-Juniata-Bedford-Fulton-Franklin-Snyder-
Northumberland-Perry-Dauphin-Schuylkill-Lebanon-Cumberland-Adams-
York-Lancaster-
234 PM EDT Thu Jun 4 2020

...SEVERE THUNDERSTORM WATCH 250 IN EFFECT UNTIL 10 PM EDT THIS
EVENING...

This Hazardous Weather Outlook is for central Pennsylvania.

.DAY ONE...This afternoon and tonight.

Please listen to NOAA Weather Radio or go to
weather.gov/StateCollege on the internet for more
information about the following hazards.

   Severe Thunderstorm Watch.

Locally heavy rainfall is expected with many of these storms.
Flooding may result.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

Locally heavy rainfall is possible Friday afternoon and may produce
isolated flooding primarily in more sensitive urban areas.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

In the hours before

Local storm report, Jun 4, 10:58 AM EST, 3 hours 2 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE STATE COLLEGE PA
1158 AM EDT THU JUN 4 2020

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0615 PM     TSTM WND DMG     1 NNW NEWMANSTOWN       40.36N 76.22W
06/03/2020                   LEBANON            PA   PUBLIC

            SEVERAL LARGE TREES DOWN AND ROOF DAMAGE TO
            HOUSE.

&&

RXR

Local storm report, Jun 4, 11:29 AM EST, 2 hours 31 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE STATE COLLEGE PA
1229 PM EDT THU JUN 4 2020

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0827 PM     TSTM WND DMG     DALLASTOWN              39.89N 76.64W
06/03/2020                   YORK               PA   TRAINED SPOTTER

            REPORTED AT KIRSTA LANE DALLASTOWN PA. TREES
            DOWN ON ROAD. POWER OUT.

&&

Local storm report, Jun 4, 12:27 PM EST, 1 hour 33 minutes before

PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE STATE COLLEGE PA
127 PM EDT THU JUN 4 2020

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0830 PM     TSTM WND DMG     1 S WINDSOR             39.90N 76.58W
06/03/2020                   YORK               PA   PUBLIC

            TREE AND WIRES DOWN ACROSS JEFFERSON LANE.

0830 PM     TSTM WND DMG     1 NW WINDSOR            39.92N 76.59W
06/03/2020                   YORK               PA   PUBLIC

            TREE DOWN.

0827 PM     TSTM WND DMG     1 NNW RED LION          39.91N 76.61W
06/03/2020                   YORK               PA   PUBLIC

            TREE DOWN.

0827 PM     TSTM WND DMG     DALLASTOWN              39.89N 76.64W
06/03/2020                   YORK               PA   TRAINED SPOTTER

            REPORTED AT KIRSTA LANE DALLASTOWN PA. TREES
            DOWN ON ROAD. POWER OUT.

0817 PM     TSTM WND DMG     1 E YORK                39.96N 76.71W
06/03/2020                   YORK               PA   PUBLIC

            TREE DOWN ON WIRES.

0815 PM     TSTM WND DMG     2 WSW STONYBROOK        39.97N 76.68W
06/03/2020                   YORK               PA   BROADCAST MEDIA

            SEVERAL LARGE TREES DOWN.

0802 PM     TSTM WND DMG     3 NNW DOVER             40.05N 76.88W
06/03/2020                   YORK               PA   PUBLIC

            TREE DOWN.

0800 PM     TSTM WND DMG     DOVER                   40.01N 76.85W
06/03/2020                   YORK               PA   PUBLIC

            MANY LARGE TREES DOWN. DAMAGE TO GARAGE.

0734 PM     HAIL             1 N CARLISLE            40.22N 77.20W
06/03/2020  E0.70 INCH       CUMBERLAND         PA   TRAINED SPOTTER

0730 PM     TSTM WND DMG     2 E CARLISLE            40.20N 77.17W
06/03/2020                   CUMBERLAND         PA   PUBLIC

            MULTIPLE TREES DOWN.

0728 PM     TSTM WND DMG     1 ENE CARLISLE          40.20N 77.19W
06/03/2020                   CUMBERLAND         PA   LAW ENFORCEMENT

            TREE DOWN.

0654 PM     TSTM WND DMG     4 SSW CHURCHTOWN        40.08N 75.99W
06/03/2020                   LANCASTER          PA   UTILITY COMPANY

            TREES DOWN ON WIRES.

0639 PM     TSTM WND DMG     3 ESE EPHRATA           40.16N 76.13W
06/03/2020                   LANCASTER          PA   UTILITY COMPANY

            TREES DOWN ON WIRES.

0632 PM     TSTM WND DMG     2 ENE BRICKERVILLE      40.23N 76.24W
06/03/2020                   LANCASTER          PA   UTILITY COMPANY

            TREES DOWN ON WIRES.

0615 PM     TSTM WND DMG     NEWMANSTOWN             40.35N 76.21W
06/03/2020                   LEBANON            PA   PUBLIC

            LARGE TREE DOWN AND COPPER ROOF TORN OFF
            PORCH.

0615 PM     TSTM WND DMG     1 NNW NEWMANSTOWN       40.36N 76.22W
06/03/2020                   LEBANON            PA   PUBLIC

            SEVERAL LARGE TREES DOWN AND ROOF DAMAGE TO
            HOUSE.

0614 PM     TSTM WND DMG     RICHLAND                40.36N 76.26W
06/03/2020                   LEBANON            PA   UTILITY COMPANY

            TREES DOWN ON WIRES.

0602 PM     TSTM WND DMG     2 W HARPER TAVERN       40.41N 76.61W
06/03/2020                   LEBANON            PA   TRAINED SPOTTER

            12 TREES DOWN.

0559 PM     TSTM WND DMG     1 SSE MEISERVILLE       40.66N 76.94W
06/03/2020                   SNYDER             PA   EMERGENCY MNGR

            BARN DESTROYED AT ORIENTAL RD AND SAWMILL RD
            IN CHAPMAN TWP.

0542 PM     TSTM WND DMG     3 ENE ELIZABETHVILLE    40.57N 76.77W
06/03/2020                   DAUPHIN            PA   911 CALL CENTER

            TREES AND POWERLINES DOWN.

0515 PM     TSTM WND DMG     2 NNE OGDENSBURG        41.62N 76.97W
06/03/2020                   TIOGA              PA   UTILITY COMPANY

            TREES DOWN ON WIRES.

0507 PM     TSTM WND DMG     2 E BEAVERTOWN          40.76N 77.13W
06/03/2020                   SNYDER             PA   EMERGENCY MNGR

            CAMPGROUND DESTROYED AT 275 CAMPGROUND LN IN
            BEAVER TWP.

0427 PM     TSTM WND DMG     1 WNW LAMAR             41.02N 77.53W
06/03/2020                   CLINTON            PA   UTILITY COMPANY

            TREES DOWN ON WIRES NEAR LAMAR.

&&

Special weather statement, Jun 4, 1:14 PM EST, 46 minutes before

Special Weather Statement
National Weather Service State College PA
214 PM EDT Thu Jun 4 2020

PAZ034-035-041845-
Bedford PA-Fulton PA-
214 PM EDT Thu Jun 4 2020

...A STRONG THUNDERSTORM WILL AFFECT PARTS OF BEDFORD AND FULTON
COUNTIES UNTIL 245 PM EDT...

At 213 PM EDT, Doppler radar indicated a strong thunderstorm near
Clearville, moving northeast at 30 mph.

Wind gusts 40 to 50 mph and penny size hail are possible.

Locations impacted include...
Breezewood, Clearville, Everett, Harrisonville, Crystal Springs,
Wells Tannery, Valley-Hi, Saluvia, Locust Grove, Sideling Hill Rest
Area, Defiance, Hopewell and Rainsburg.

LAT...LON 3991 7855 4020 7819 4018 7815 3989 7798
      3980 7851
TIME...MOT...LOC 1813Z 257DEG 40KT 3987 7843

Gartner

Special weather statement, Jun 4, 1:45 PM EST, 15 minutes before

Special Weather Statement
National Weather Service State College PA
245 PM EDT Thu Jun 4 2020

PAZ025-026-034>036-041915-
Bedford PA-Fulton PA-Franklin PA-Blair PA-Huntingdon PA-
245 PM EDT Thu Jun 4 2020

...STRONG THUNDERSTORMS WILL AFFECT PARTS OF BEDFORD...HUNTINGDON...
FRANKLIN...FULTON...AND BLAIR COUNTIES UNTIL 315 PM EDT...

At 244 PM EDT, Doppler radar indicated strong thunderstorms along a
line extending from near Osterburg to Locust Grove. Movement was
northeast at 35 mph.

Wind gusts 40 to 50 mph and penny size hail are possible.

Locations impacted include...
Breezewood, Clearville, New Enterprise, Martinsburg, Everett,
McConnellsburg, Osterburg, Harrisonville, Crystal Springs, Waterfall,
Rockhill Furnace, Wells Tannery, Fort Littleton, Dudley, St.
Clairsville, Valley-Hi, Entriken, Fannettsburg, Saluvia and Shy
Beaver.

This includes the following COVID-19 Test Sites...
Fulton County Medical Center...
and UPMC Bedford Memorial.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Torrential rainfall is also occurring with these storms, and may
lead to localized flooding. Do not drive your vehicle through
flooded roadways.

&&

LAT...LON 4045 7802 4000 7772 3983 7834 4020 7858
TIME...MOT...LOC 1844Z 245DEG 53KT 4019 7849 3986 7827

Gartner

Special weather statement, Jun 4, 2:00 PM EST, 0 minutes before

Special Weather Statement
National Weather Service State College PA
300 PM EDT Thu Jun 4 2020

PAZ019-026-027-041930-
Huntingdon PA-Mifflin PA-Southern Centre PA-
300 PM EDT Thu Jun 4 2020

...A STRONG THUNDERSTORM WILL AFFECT PARTS OF HUNTINGDON...MIFFLIN...
AND CENTRE COUNTIES UNTIL 330 PM EDT...

At 258 PM EDT, Doppler radar indicated a strong thunderstorm over
Rock Springs, moving northeast at 30 mph.

Wind gusts 40 to 50 mph and penny size hail are possible.

Locations impacted include...
State College, Bellefonte, Park Forest Village, Boalsburg, Pleasant
Gap, Lemont, Zion, Houserville, Pine Grove Mills, Milroy, Centre
Hall, Milesburg, Ramblewood, Reedsville, Spring Mills, Franklinville,
Whipple Dam State Park, Bald Eagle State Park, Reeds Gap State Park
and Mcalevys Fort.

This includes the following COVID-19 Test Sites...
Blue Course Drive...
Geisinger...
Mount Nittany Health...
Mount Nittany Health Boalsburg...
Mt. Nittany Medical Center Emergency...
and State College Urgent Care Center.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Very heavy rainfall is also occurring with this storm, and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.

&&

LAT...LON 4066 7813 4105 7772 4107 7767 4070 7739
      4055 7804
TIME...MOT...LOC 1858Z 242DEG 43KT 4068 7796

Gartner

The radar

The State College radar (KCCX), 94 km away, was scanning. The volume nearest the first event began at 18:58 UTC.

Open the radar archive at this moment

Event by event

41 thunderstorm wind, 12 hail, 1 flash flood. Local standard time, as filed.

Hail, Bedford

When: June 4, 2:00 PM EST
Where: Bedford County, Osterburg
Measured: 1 in hail
Reported by: Public
Coordinates: 40.170, -78.520

A severe thunderstorm produced hail up to the size of quarters in Osterburg.

Hail, Fulton

When: June 4, 2:13 PM EST
Where: Fulton County, 0.66 mi NW of Mc Connellsburg
Measured: 1.5 in hail
Reported by: Public
Coordinates: 39.937, -78.008

A severe thunderstorm produced hail up to the size of ping-pong balls at the Fulton Medical Center, which was confirmed by video footage.

Hail, Fulton

When: June 4, 2:15 PM EST
Where: Fulton County, 1.47 mi NW of Mc Connellsburg
Measured: 1 in hail
Reported by: Public
Coordinates: 39.944, -78.021

A severe thunderstorm produced quarters-sized hail along Route 30 near McConnellsburg.

Hail, Fulton

When: June 4, 2:22 PM EST
Where: Fulton County, 1.18 mi ENE of Harrisonville
Measured: 1 in hail
Reported by: Other Federal Agency
Coordinates: 39.988, -78.060

A severe thunderstorm produced quarter-sized hail in Harrisonville.

Hail, Fulton

When: June 4, 2:28 PM EST
Where: Fulton County, 1.57 mi NNE of Webster Mill
Measured: 1.5 in hail
Reported by: Public
Coordinates: 39.890, -78.016

A severe thunderstorm produced hail up to the size of ping-pong balls in Ayr Township.

Hail, Fulton

When: June 4, 2:30 PM EST
Where: Fulton County, 0.08 mi NE of Mc Connellsburg
Measured: 1 in hail
Reported by: Other Federal Agency
Coordinates: 39.931, -77.999

A severe thunderstorm produced quarter-sized hail that covered the ground at the post office in McConnellsburg.

Hail, Franklin

When: June 4, 2:52 PM EST
Where: Franklin County, 0.79 mi SW of Ft Loudon
Measured: 0.88 in hail
Reported by: Public
Coordinates: 39.911, -77.909

A sub-severe thunderstorm produced hail up the to size of nickels near Fort Loudon.

Thunderstorm Wind, Perry

When: June 4, 3:34 PM EST
Where: Perry County, 0.94 mi ENE of Wila
Measured: 52 kt (60 mph) estimated gust
Property damage: $3,000
Reported by: 911 Call Center
Coordinates: 40.484, -77.153

A severe thunderstorm producing winds estimated near 60 mph knocked down numerous trees across Trout Road near Newport.

Hail, Centre

When: June 4, 3:35 PM EST
Where: Centre County, 0.87 mi NW of State College
Measured: 1 in hail
Reported by: Public
Coordinates: 40.790, -77.860

A severe thunderstorm produced hail up to the size of quarters in State College.

Hail, Centre

When: June 4, 3:36 PM EST
Where: Centre County, 2.02 mi SW of State College
Measured: 0.75 in hail
Reported by: Public
Coordinates: 40.760, -77.878

A sub-severe thunderstorm produced penny-sized hail at the intersection of Whitehall Road and West College Avenue near State College.

Thunderstorm Wind, Perry

When: June 4, 3:36 PM EST
Where: Perry County, 0.74 mi N of Newport
Measured: 52 kt (60 mph) estimated gust
Property damage: $8,000
Reported by: 911 Call Center
Coordinates: 40.481, -77.128

A severe thunderstorm producing winds estimated near 60 mph knocked down numerous trees across Juniata Parkway near Newport, blocking the road and trapping a car.

Thunderstorm Wind, Perry

When: June 4, 3:36 PM EST
Where: Perry County, 1.2 mi NNW of Newport
Measured: 52 kt (60 mph) estimated gust
Property damage: $8,000
Reported by: 911 Call Center
Coordinates: 40.486, -77.138

A severe thunderstorm producing winds estimated near 60 mph knocked down numerous trees and wires across North 4th Street and Creek Road in Newport.

Thunderstorm Wind, Franklin

When: June 4, 3:38 PM EST
Where: Franklin County, 0.79 mi SSE of Fayetteville
Measured: 52 kt (60 mph) estimated gust
Property damage: $3,000
Reported by: Utility Company
Coordinates: 39.910, -77.543

A severe thunderstorm producing winds estimated near 60 mph knocked down trees onto wires east of Fayetteville.

Thunderstorm Wind, Perry

When: June 4, 3:38 PM EST
Where: Perry County, 0.85 mi NNE of Newport
Measured: 52 kt (60 mph) estimated gust
Property damage: $4,000
Reported by: 911 Call Center
Coordinates: 40.482, -77.124

A severe thunderstorm producing winds estimated near 60 mph knocked down trees and wires across Red Hill Road near Newport.

Thunderstorm Wind, Centre

When: June 4, 3:39 PM EST
Where: Centre County, 0.87 mi NW of State College
Measured: 43 kt (49 mph) estimated gust
Property damage: $1,000
Reported by: Public
Coordinates: 40.790, -77.860

A sub-severe thunderstorm producing winds estimated near 50 mph knocked down a tree onto a road in State College.

Thunderstorm Wind, Perry

When: June 4, 3:48 PM EST
Where: Perry County, 3.93 mi WSW of Montgomery Ferry
Measured: 52 kt (60 mph) estimated gust
Property damage: $5,000
Reported by: 911 Call Center
Coordinates: 40.480, -77.050

A severe thunderstorm producing winds estimated near 60 mph knocked down numerous trees near Amity Hall, including one on a home.

Thunderstorm Wind, Adams

When: June 4, 3:54 PM EST
Where: Adams County, 2.7 mi SW of Trust
Measured: 52 kt (60 mph) estimated gust
Property damage: $4,000
Reported by: Utility Company
Coordinates: 39.899, -77.431

A severe thunderstorm producing winds estimated near 60 mph knocked down trees and wires west of Cashtown.

Thunderstorm Wind, Perry

When: June 4, 3:54 PM EST
Where: Perry County, 2.09 mi S of Montgomery Ferry
Measured: 52 kt (60 mph) estimated gust
Property damage: $7,000
Reported by: 911 Call Center
Coordinates: 40.470, -76.980

A severe thunderstorm producing winds estimated near 60 mph knocked down numerous trees an wires north of New Buffalo.

Hail, Clinton

When: June 4, 3:55 PM EST
Where: Clinton County, 0.56 mi N of South Renovo
Measured: 0.88 in hail
Reported by: Trained Spotter
Coordinates: 41.328, -77.750

A sub-severe thunderstorm produced nickel-sized hail in Renovo.

Thunderstorm Wind, Adams

When: June 4, 4:00 PM EST
Where: Adams County, 0.94 mi SSW of Trust
Measured: 52 kt (60 mph) estimated gust
Property damage: $5,000
Reported by: Trained Spotter
Coordinates: 39.918, -77.409

A severe thunderstorm producing winds estimated near 60 mph knocked down multiple trees and blew part of a garage roof off north of Cashtown.

Thunderstorm Wind, Dauphin

When: June 4, 4:02 PM EST
Where: Dauphin County, 0.56 mi N of Waynesville
Measured: 52 kt (60 mph) estimated gust
Property damage: $4,000
Reported by: Utility Company
Coordinates: 40.458, -76.881

A severe thunderstorm producing winds estimated near 60 mph knocked down trees onto wires east of Halifax.

Thunderstorm Wind, Dauphin

When: June 4, 4:08 PM EST
Where: Dauphin County, 1.26 mi NE of Waynesville
Measured: 52 kt (60 mph) estimated gust
Reported by: 911 Call Center
Coordinates: 40.462, -76.862

A severe thunderstorm producing winds estimated near 60 mph knocked down multiple trees in Wayne Township.

Thunderstorm Wind, Dauphin

When: June 4, 4:10 PM EST
Where: Dauphin County, 2.38 mi ENE of Piketown
Measured: 52 kt (60 mph) estimated gust
Property damage: $6,000
Reported by: Public
Coordinates: 40.393, -76.708

A severe thunderstorm producing winds estimated near 60 mph knocked down multiple trees and wires across Route 443 near Manada Gap.

Thunderstorm Wind, Dauphin

When: June 4, 4:13 PM EST
Where: Dauphin County, 3.29 mi ESE of Waynesville
Measured: 52 kt (60 mph) estimated gust
Property damage: $4,000
Reported by: Utility Company
Coordinates: 40.438, -76.820

A severe thunderstorm producing winds estimated near 60 mph knocked down trees onto wires.

Thunderstorm Wind, Dauphin

When: June 4, 4:17 PM EST
Where: Dauphin County, 2.01 mi SE of Inglenook
Measured: 52 kt (60 mph) estimated gust
Property damage: $6,000
Reported by: Law Enforcement
Coordinates: 40.407, -76.907

A severe thunderstorm producing winds estimated near 60 mph knocked down multiple trees onto wires northeast of Dauphin.

Thunderstorm Wind, Adams

When: June 4, 4:27 PM EST
Where: Adams County, 0.05 mi ENE of Arendtsville
Measured: 52 kt (60 mph) estimated gust
Property damage: $2,000
Reported by: Trained Spotter
Coordinates: 39.920, -77.299

A severe thunderstorm producing winds estimated near 60 mph knocked down a tree onto wires in Arendtsville.

Thunderstorm Wind, Adams

When: June 4, 4:29 PM EST
Where: Adams County, 41.94 mi SE of Ryde
Measured: 52 kt (60 mph) estimated gust
Property damage: $3,000
Reported by: Public
Coordinates: 39.947, -77.249

A severe thunderstorm producing winds estimated near 60 mph knocked down pine trees and damaged a shed north of Biglerville.

Thunderstorm Wind, Franklin

When: June 4, 4:48 PM EST
Where: Franklin County, 0.95 mi SE of Lemasters
Measured: 52 kt (60 mph) estimated gust
Property damage: $4,000
Reported by: 911 Call Center
Coordinates: 39.860, -77.858

A severe thunderstorm producing winds estimated near 60 mph knocked down trees and wires on Lemar Road near Lemasters.

Thunderstorm Wind, Fulton

When: June 4, 4:55 PM EST
Where: Fulton County, 2.38 mi SSW of Dott
Measured: 52 kt (60 mph) estimated gust
Reported by: 911 Call Center
Coordinates: 39.789, -78.198

A severe thunderstorm producing winds estimated near 60 mph knocked down trees along Great Cover Road north of Warfordsburg.

Thunderstorm Wind, Adams

When: June 4, 5:00 PM EST
Where: Adams County, 1.33 mi ENE of Newchester
Measured: 52 kt (60 mph) estimated gust
Property damage: $10,000
Reported by: Emergency Manager
Coordinates: 39.908, -77.077

A severe thunderstorm producing winds estimated near 60 mph blew a large storage barn across Dicks Dam Road southwest of Hampton.

Thunderstorm Wind, Centre

When: June 4, 5:00 PM EST
Where: Centre County, 1.23 mi ENE of Philipsburg
Measured: 52 kt (60 mph) estimated gust
Property damage: $3,000
Reported by: Trained Spotter
Coordinates: 40.908, -78.209

A severe thunderstorm producing winds estimated near 60 mph knocked down trees and wires in North Philipsburg.

Thunderstorm Wind, Franklin

When: June 4, 5:01 PM EST
Where: Franklin County, 1.21 mi ENE of Marion
Measured: 52 kt (60 mph) estimated gust
Property damage: $4,000
Reported by: 911 Call Center
Coordinates: 39.854, -77.678

A severe thunderstorm producing winds estimated near 60 mph knocked down trees and wires on Marion Road south of Chambersburg.

Thunderstorm Wind, Lebanon

When: June 4, 5:02 PM EST
Where: Lebanon County, 0.69 mi SSW of Bunker Hill
Measured: 52 kt (60 mph) estimated gust
Property damage: $3,000
Reported by: Public
Coordinates: 40.390, -76.483

A severe thunderstorm producing winds estimated near 60 mph knocked down a tree onto wires south of Jonestown.

Thunderstorm Wind, Franklin

When: June 4, 5:03 PM EST
Where: Franklin County, 0.63 mi E of Chambersburg
Measured: 52 kt (60 mph) estimated gust
Property damage: $4,000
Reported by: 911 Call Center
Coordinates: 39.931, -77.658

A severe thunderstorm producing winds estimated near 60 mph knocked down trees and wires onto South Third Street in Chambersburg.

Thunderstorm Wind, Fulton

When: June 4, 5:03 PM EST
Where: Fulton County, 1.07 mi WNW of Gem
Measured: 52 kt (60 mph) estimated gust
Property damage: $4,000
Reported by: 911 Call Center
Coordinates: 39.854, -78.139

A severe thunderstorm producing winds estimated near 60 mph knocked down trees and wires near Needmore.

Thunderstorm Wind, Franklin

When: June 4, 5:09 PM EST
Where: Franklin County, 0.86 mi ENE of Chambersburg Muni Ar
Measured: 52 kt (60 mph) estimated gust
Property damage: $4,000
Reported by: Utility Company
Coordinates: 39.975, -77.635

A severe thunderstorm producing winds estimated near 60 mph knocked down trees onto wires west of Scotland.

Thunderstorm Wind, York

When: June 4, 5:33 PM EST
Where: York County, 2.89 mi WNW of Hollzswam
Measured: 52 kt (60 mph) estimated gust
Property damage: $8,000
Reported by: Newspaper
Coordinates: 39.939, -76.983

A severe thunderstorm producing winds estimated near 60 mph knocked down numerous trees in East Berlin, including one on a home.

Thunderstorm Wind, Franklin

When: June 4, 5:38 PM EST
Where: Franklin County, 0.59 mi SE of Willow Hill
Measured: 52 kt (60 mph) estimated gust
Property damage: $2,000
Reported by: 911 Call Center
Coordinates: 40.113, -77.773

A severe thunderstorm producing winds estimated near 60 mph knocked down trees across Hill Road near Willow Hill.

Thunderstorm Wind, York

When: June 4, 5:47 PM EST
Where: York County, 0.71 mi SW of Botts
Measured: 52 kt (60 mph) estimated gust
Property damage: $5,000
Reported by: 911 Call Center
Coordinates: 39.923, -76.840

A severe thunderstorm producing winds estimated near 60 mph knocked down a tree onto a home near Thomasville.

Thunderstorm Wind, Cumberland

When: June 4, 5:48 PM EST
Where: Cumberland County, 1.69 mi SW of Greason
Measured: 52 kt (60 mph) estimated gust
Property damage: $4,000
Reported by: 911 Call Center
Coordinates: 40.164, -77.304

A severe thunderstorm producing winds estimated near 60 mph knocked down trees across Route 11 near Newville, closing the road.

Thunderstorm Wind, York

When: June 4, 5:50 PM EST
Where: York County, 0.67 mi ENE of Nashville
Measured: 52 kt (60 mph) estimated gust
Property damage: $2,000
Reported by: 911 Call Center
Coordinates: 39.902, -76.858

A severe thunderstorm producing winds estimated near 60 mph knocked down a tree and wires south of Thomasville.

Thunderstorm Wind, Cumberland

When: June 4, 5:52 PM EST
Where: Cumberland County, 0.88 mi NW of Greason
Measured: 52 kt (60 mph) estimated gust
Property damage: $5,000
Reported by: 911 Call Center
Coordinates: 40.189, -77.291

A severe thunderstorm producing winds estimated near 60 mph knocked down a large tree onto a house near Plainfield.

Flash Flood, Schuylkill

When: June 4, 5:55 PM EST to 8:15 PM EST
Where: Schuylkill County, 0.78 mi NE of Pine Glen to 0.37 mi S of Pine Glen
Cause: Heavy Rain
Reported by: State Official
Coordinates: 40.557, -76.368

Heavy rainfall brought flash flooding to Pine Grove which resulted in several closed roads.

Thunderstorm Wind, Cumberland

When: June 4, 6:02 PM EST
Where: Cumberland County, 0.91 mi NW of Gettysburg Jct
Measured: 52 kt (60 mph) estimated gust
Property damage: $4,000
Reported by: Utility Company
Coordinates: 40.231, -77.180

A severe thunderstorm producing winds estimated near 60 mph knocked down trees and wires near Carlisle Springs.

Thunderstorm Wind, York

When: June 4, 6:02 PM EST
Where: York County, 1.29 mi S of New Salem
Measured: 52 kt (60 mph) estimated gust
Property damage: $4,000
Reported by: 911 Call Center
Coordinates: 39.882, -76.784

A severe thunderstorm producing winds estimated near 60 mph knocked down trees and wires south of New Salem.

Thunderstorm Wind, York

When: June 4, 6:03 PM EST
Where: York County, 0.9 mi SW of New Salem
Measured: 52 kt (60 mph) estimated gust
Reported by: Public
Coordinates: 39.891, -76.792

A severe thunderstorm producing winds estimated near 60 mph knocked down multiple trees south of New Salem.

Hail, York

When: June 4, 6:15 PM EST
Where: York County, 0.87 mi NW of Loganville
Measured: 1.5 in hail
Reported by: Public
Coordinates: 39.860, -76.710

A severe thunderstorm produced ping-pong ball sized hail in Loganville.

Thunderstorm Wind, Mifflin

When: June 4, 6:15 PM EST
Where: Mifflin County, 1.96 mi W of Newton Hamilton
Measured: 52 kt (60 mph) estimated gust
Property damage: $4,000
Reported by: 911 Call Center
Coordinates: 40.400, -77.867

A severe thunderstorm producing winds estimated near 60 mph knocked down trees and wires in Wayne Township.

Thunderstorm Wind, York

When: June 4, 6:15 PM EST
Where: York County, 0.8 mi NNW of Loganville
Measured: 52 kt (60 mph) estimated gust
Reported by: Public
Coordinates: 39.860, -76.708

A severe thunderstorm producing winds estimated near 60 mph knocked down and snapped several large trees in Loganville.

Hail, York

When: June 4, 6:24 PM EST
Where: York County, 0.53 mi E of Dallastown
Measured: 1 in hail
Reported by: Trained Spotter
Coordinates: 39.900, -76.640

A severe thunderstorm produced quarter-sized hail in Dallastown.

Thunderstorm Wind, Clearfield

When: June 4, 6:32 PM EST
Where: Clearfield County, 0.59 mi NNE of Oshanter
Measured: 52 kt (60 mph) estimated gust
Property damage: $4,000
Reported by: Utility Company
Coordinates: 40.937, -78.464

A severe thunderstorm producing winds estimated near 60 mph knocked down trees on wires southeast of Curwensville.

Thunderstorm Wind, Dauphin

When: June 4, 6:32 PM EST
Where: Dauphin County, 0.84 mi N of Harrisburg
Measured: 52 kt (60 mph) estimated gust
Property damage: $4,000
Reported by: Utility Company
Coordinates: 40.282, -76.873

A severe thunderstorm producing winds estimated near 60 mph knocked down trees on wires east of Harrisburg.

Thunderstorm Wind, Dauphin

When: June 4, 7:21 PM EST
Where: Dauphin County, 1.83 mi NNE of Piketown
Measured: 52 kt (60 mph) estimated gust
Property damage: $4,000
Reported by: Utility Company
Coordinates: 40.402, -76.731

A severe thunderstorm producing winds estimated near 60 mph knocked down trees and wires near Manada Gap.

Thunderstorm Wind, Lancaster

When: June 4, 7:31 PM EST
Where: Lancaster County, 0.92 mi SW of Centerville
Measured: 52 kt (60 mph) estimated gust
Property damage: $4,000
Reported by: 911 Call Center
Coordinates: 40.060, -76.411

A severe thunderstorm producing winds estimated near 60 mph knocked down trees and wires on Marietta Avenue north of Mountville.

What these are

Hail: Hail three-quarters of an inch or larger, or smaller hail that caused damage, filed with the largest stone measured.
Thunderstorm Wind: Winds from a thunderstorm of 50 knots (58 mph) or more, or lower winds that caused damage or casualties. Measured gusts are marked MG, estimated EG.
Flash Flood: Flooding that begins within six hours of the rain that causes it, or of a dam or levee failure or ice jam release, often with deadly speed.

After NWS Directive 10-1605, the rules offices file Storm Data by.

The same day elsewhere

Every storm in Pennsylvania in 2020 Every state in 2020 This day in weather history Warnings in Pennsylvania, June 2020

Sources

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: 896329, 896330, 896331, 896332, 896333, 896334, 896335, 896564, 896336, 896337, 896565, 896566, 896567, 896568, 896569, 896571, 896578, 896579, 896338, 896580, 896581, 896582, 896583, 896584, 896585, 896587, 884720, 896588, 896589, 896586, 896595, 896596, 896597, 896598, 896599, 896600, 896602, 896604, 896605, 896606, and more.