A MCV and broader mid-level trough crossed the central Appalachians and triggered strong to severe thunderstorms from the central ridges into the Susquehanna River Valley during the afternoon and evening. Very high boundary layer moisture and humidity contributed to heavy rainfall/flash flooding and precipitation loading within consolidating convection. While the deep layer flow and shear were somewhat modest, ambient vertical vorticity just ahead of the MCV and low LCLs aided in the development of two weak, short-lived (EF1) tornadoes in Centre and Perry Counties. Deep moisture (PWAT) values around two inches along with relatively slow, south-to-north training cells and bands produced significant flash flooding, particularly in DuBois and Beech Creek which sustained extensive flood damages due localized 4-6+ inch rainfall amounts. Both towns were declared a State of Emergency. The Bald Eagle Creek at Beech Creek Station surged nearly 8 feet in 4 hours and crested just below major flood stage. The creek officially crested at 13.75 feet which was the sixth highest crest on record. An 86-year old man was swept away and killed by the rising flood waters in Beech Creek.

Flash Flood in CENTRE, PENNSYLVANIA
From 27-JUN-13 14:00:00 to 27-JUN-13 18:00:00 (EST-5)
Location: POTTERS MILLS
Flood cause: Heavy Rain
Property damage: 1.50M
Crop damage: 0.00K
Reported by: Emergency Manager

Torrential rains produced flash flooding in the Centre region from Pine Grove Mills and State College through Bellefonte and Milesburg. The hardest hit area was from Milesburg northeast along Route 150 to the Blanchard/Beech Creek Area near the Centre/Clinton county line. Numerous roads were closed including Route 26 from Porter Road to Benner Pike in College Township, Jacksonville Road (Route 26) in Marion Township, Route 3005 (Fox Hollow Road) from Cricklewood Drive in Patton Township to Park Ave/Porter Road in College Township, Route 455 in Walker Township, Route 550 from Upper Gyp Road to Reynolds Lane in Benner Township and Route 26 at Walnut Ridge Road in Marion Township.

Flash Flood in MONTOUR, PENNSYLVANIA
From 27-JUN-13 17:15:00 to 27-JUN-13 19:30:00 (EST-5)
Location: MANSDALE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Heavy rains caused flash flooding in the Danville area (Mahoning Township). Several secondary roads were closed due to the flooding.

Flash Flood in CLINTON, PENNSYLVANIA
From 27-JUN-13 16:00:00 to 27-JUN-13 20:00:00 (EST-5)
Location: BEECH CREEK
Flood cause: Heavy Rain
Property damage: 2.10M
Crop damage: 0.00K
Reported by: Emergency Manager

Torrential rains of 4-6 inches in an hour caused significant flash flooding in the Beech Creek area. The flash flooding extended northeast along Route 150 into Mill Hall. The heavy rains and flood waters inundated the Beech Creek area, which resulted in a State of Emergency and Disaster Declaration due to numerous roads closed/damaged and covered in debris from flood waters. Many of the road closures and damage was confined in Beech Creek Township. More than 30 miles of roadway, including drainage culverts and bridges, were affected by the flooding.
One home in the Beech Creek area was destroyed and another sustained major damage. An additional 14 homes also sustained minor damage. Flood-related damages totaled over 10 million dollars.
An 86-year-old man was swept away by rising flood waters along Bald Eagle Creek while trying to rescue his ATV. His body was found two days later on Saturday, June 29, 2013 by kayakers.
The Bald Eagle Creek at Beech Creek Station surged nearly 8 feet in 4 hours and crested just below major flood stage. The creek officially crested at 13.75 feet which was the sixth highest crest on record.

Thunderstorm Wind in PERRY, PENNSYLVANIA
From 27-JUN-13 13:40:00 to 27-JUN-13 13:40:00 (EST-5)
Location: BLAIN
Magnitude: 50.00 EG
Property damage: 5.00K
Reported by: 911 Call Center

Thunderstorm winds estimated near 60 mph knocked down trees and utility wires in Blain. This rotating storm produced an EF1 tornado west-southwest of Blain near Big Spring State Park.

Thunderstorm Wind in LANCASTER, PENNSYLVANIA
From 27-JUN-13 15:13:00 to 27-JUN-13 15:13:00 (EST-5)
Location: INTERCOURSE
Magnitude: 50.00 EG
Property damage: 5.00K
Reported by: Emergency Manager

Thunderstorm winds estimated near 60 mph knocked down trees in Upper Leacock Township.

Flash Flood in CLEARFIELD, PENNSYLVANIA
From 27-JUN-13 10:40:00 to 27-JUN-13 19:00:00 (EST-5)
Location: CLEAR RUN
Flood cause: Heavy Rain
Property damage: 3.00M
Crop damage: 0.00K
Reported by: Emergency Manager

Torrential rains inundated the DuBois area with over 5 inches of rain in a 2-3 hour period from late morning into the early afternoon. Nearly 6.5 inches of rain fell at the city's sewage treatment plant, which was consistent with radar-derived storm total precipitation estimates.  This resulted in historic flash flooding and closed all roads coming into and going out of the DuBois area. A state of emergency and disaster declaration was issued for Clearfield County and the DuBois area in the wake of widespread flooding. Preliminary damages related to the flooding are estimated around $15 million dollars.
The flash flooding closed dozens of roads in the northwestern portion of Clearfield County and the DuBois area. The road closures included Route 255 (East DuBois Avenue) from the intersection with McCracken Run Road in DuBois City to Penfield, Route 4003 (Mine Road) between the intersection of Route 410 (Shamokin Trail) and the intersection with Route 4002 (Stanley Bottom Road) in Brady Township, Route 3009 (McGees Mills Road) between the intersection with Buhite Road and the intersection with Grant Road in Brady Township, Dixon Avenue, Jared Street, East Maloney Road near the railroad tracks, Simpson Avenue, Platt Road, Clear Run Road and Pifer Street. DuBois City Manager John Suplizio said that the whole city was hit hard but the lower parts were devastated. Those areas include Chestnut Street, Dixon Avenue, Jared Street, The Flats, Pentz Run, Daly Street, Locust Street, Hamor Street, Sandy Street, DuBois Street and adjacent areas.
Sandy Lick Creek and Tannery Dam overflowed which contributed to the widespread flooding and road closures. The Sandy Township swift water rescue team along with other local fire departments performed over 30 rescues. More than 130 people were taken to the DuBois Area High School where a shelter was set up.

Flood in CLEARFIELD, PENNSYLVANIA
From 27-JUN-13 19:00:00 to 28-JUN-13 00:15:00 (EST-5)
Location: CLEAR RUN
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Significant flash flooding in the DuBois area transitioned to areal flooding during the late evening. The flood waters receded shortly after midnight.

Flood in CENTRE, PENNSYLVANIA
From 27-JUN-13 18:00:00 to 27-JUN-13 21:45:00 (EST-5)
Location: POTTERS MILLS
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Flash flooding around the Centre region transitioned to areal flooding during the evening. The flood waters receded before midnight.

Thunderstorm Wind in CENTRE, PENNSYLVANIA
From 27-JUN-13 16:05:00 to 27-JUN-13 16:05:00 (EST-5)
Location: JACKSONVILLE
Magnitude: 50.00 EG
Property damage: 2.00K
Reported by: Trained Spotter

Thunderstorm winds estimated near 60 mph knocked down trees along Jacksonville Road (Route 26).

Thunderstorm Wind in NORTHUMBERLAND, PENNSYLVANIA
From 27-JUN-13 17:01:00 to 27-JUN-13 17:01:00 (EST-5)
Location: SOUTH DANVILLE
Magnitude: 50.00 EG
Property damage: 2.00K
Reported by: 911 Call Center

Thunderstorm winds estimated near 60 mph knocked down trees along Blue Hill Road in Riverside.

Tornado in CENTRE, PENNSYLVANIA
From 27-JUN-13 15:05:00 to 27-JUN-13 15:07:00 (EST-5)
Location: LINDEN HALL
Tornado F-scale: EF1
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

An EF1 tornado was confirmed just east of Boalsburg on Nittany Farm between US 322 (General Potter Highway) and Route 45 (Earlystown Road). The maximum wind speed was 100 mph. Eyewitnesses said the tornado pulled a small tree in a holding pond about 50 feet in the air. Visible damages included sporadic trees snapped/knocked down and metal roofing off of several outbuildings and corn crib. The last observed damage was near Cedar Run road or about 1 mile to the northwest from the initial touchdown. There were no injuries or deaths.

Thunderstorm Wind in CENTRE, PENNSYLVANIA
From 27-JUN-13 17:05:00 to 27-JUN-13 17:05:00 (EST-5)
Location: SNYDERTOWN
Magnitude: 50.00 EG
Property damage: 2.50K
Reported by: 911 Call Center

Thunderstorm winds estimated near 60 mph knocked down trees along I-80 south of Beech Creek.

Thunderstorm Wind in COLUMBIA, PENNSYLVANIA
From 27-JUN-13 17:09:00 to 27-JUN-13 17:09:00 (EST-5)
Location: BLOOMSBURG
Magnitude: 50.00 EG
Property damage: 2.50K
Reported by: 911 Call Center

Thunderstorm winds estimated near 60 mph knocked down trees in Bloomsburg.

Thunderstorm Wind in CENTRE, PENNSYLVANIA
From 27-JUN-13 15:40:00 to 27-JUN-13 15:40:00 (EST-5)
Location: PINE GROVE MILLS
Magnitude: 50.00 EG
Property damage: 2.00K
Reported by: Public

Thunderstorm winds estimated near 60 mph knocked down trees on Pine Grove Mountain.

Thunderstorm Wind in HUNTINGDON, PENNSYLVANIA
From 27-JUN-13 13:40:00 to 27-JUN-13 13:40:00 (EST-5)
Location: MANOR HILL
Magnitude: 50.00 EG
Property damage: 2.00K
Reported by: 911 Call Center

Thunderstorm winds estimated near 60 mph knocked down trees around Petersburg.

Flood in CLINTON, PENNSYLVANIA
From 27-JUN-13 20:00:00 to 28-JUN-13 01:45:00 (EST-5)
Location: BEECH CREEK
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Significant flash flooding in the Beech Creek and Mill Hall areas transitioned to areal flooding from the late evening into the early overnight hours. The flood waters slowly receded overnight into the early morning hours on June 28, 2013.

Tornado in PERRY, PENNSYLVANIA
From 27-JUN-13 13:19:00 to 27-JUN-13 13:24:00 (EST-5)
Location: NEW GERMANTOWN
Tornado F-scale: EF1
Property damage: 2.50K
Reported by: NWS Storm Survey

An EF1 tornado was confirmed in Toboyne Township near Big Spring State Park/Burnt Hill Camp Area with maximum wind speeds between 80 and 90 mph. The tornado touched down one half mile southwest of Goodlane Road just off of Route 274. Large trees were uprooted and fell on a roof of a cabin. Occasional tree damage occurred in the woods along (on the east-side of) Route 274 to the Eby Cemetery. Some trees fell and blocked the road. A metal roof was partially removed from an old barn. A wind circulation was evident in a tall grass field at the end of the 3-mile damage path. All together, about 75 trees were knocked down. There were no injuries or deaths.

Flash Flood in DAUPHIN, PENNSYLVANIA
From 27-JUN-13 16:20:00 to 27-JUN-13 18:45:00 (EST-5)
Location: PENBROOK
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Heavy rains caused urbanized flash flooding around Harrisburg and Penbrook. Further north, flash flooding closed a section of Route 209 in Upper Paxton Township.