Tropical Storm and Storm Surge in Pennsylvania, August 27 to 30, 2011

Name: Tropical Storm and Storm Surge in Pennsylvania, August 27 to 30, 2011
Start: 2011-08-27T19:00
End: 2011-08-30T01:19
Location: Pennsylvania

August 27 to 30, 2011 · NWS PHI · 32 events in 10 counties and zones

Where it happened

Every event with a place to put it; 9 filed by county or forecast zone are drawn at its center, in a lighter ring. 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: 3
Injuries: 0
Property damage: $7.0 million
Crop damage: None recorded
Events: 32

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 PHI wrote it up.

Irene produced heavy flooding rain, tropical storm force wind gusts with hundreds of thousands of outages, moderate tidal flooding along the Delaware River and one flooding related death in Eastern Pennsylvania over the weekend of August 27th and 28th. Moderate stream and river flooding occurred in the Poconos and Lehigh Valley and moderate to major river flooding occurred in southeast Pennsylvania. For many places in southeastern Pennsylvania, it was the worst creek and river flooding since Hurricane Floyd in 1999 or the remnants of Hurricane Jeanne in 2004. Flooding along non-tidal sections of the Delaware River was minor to moderate. There were two direct storm caused deaths: a wind related death in Monroe County and a drowning in Montgomery County. About 500,000 PECO Energy and 420,000 Pennsylvania Power and Light customers lost power in Eastern Pennsylvania. For both utilities this ranked within the top five outages of all time. Preliminary damage estimates were around six million dollars. In addition to property damage, the winds and rains badly damaged the corn crop in southeastern Pennsylvania. The Delaware Water Gap National Recreational Area was closed through Labor Day Weekend (September 5th).

Tropical storm force wind gusts overspread Eastern Pennsylvania during the evening of the 27th and persisted into the afternoon of the 28th. Peak wind gusts averaged around 50 mph. The strongest winds associated with Irene occurred at two distinct times. The first surge occurred during bands of heavier rain during the evening of the 27th and early morning of the 28th. The second peak occurred during the afternoon of the 28th when skies were clearing and deeper mixing of the atmosphere brought stronger winds to the ground. Most of the peak wind gusts occurred at this time. The rain associated with Irene overspread Eastern Pennsylvania during the late morning on the 27th, fell at its heaviest from during the evening of the 27th into the early morning of the 28th and ended during the early afternoon on the 28th. Event precipitation totals averaged 3 to 7 inches and caused widespread flooding. Because the flash flooding and flooding blended into one, all flooding related stormdata county entries were combined into one under flood events. The storm surge of 3 to 5 feet caused moderate tidal flooding along tidal sections of the Delaware River overnight on the 27th. Minor tidal flooding occurred during the high tide cycles from the 29th through the 31st. | |In Stroudsburg (Monroe County), a 44-year-old man died when a tree fell on him in his backyard. He pushed his son to safety. Governor Tom Corbett declared a state of emergency for the city of Philadelphia and the surrounding suburbs. The Southeastern Pennsylvania Transportation Authority halted all commuter rail service during the evening of the 27th as multiple tornado warnings were issued. Three large shelters on the evening of August 27th in Philadelphia. The Philadelphia International Airport closed at 1030 p.m. EDT on the 27th and reopened on Monday the 29th. In Philadelphia, the storm left thousands without power. More than 500 trees fell in the city, seven buildings collapsed and twenty roads were closed. PECO Energy restored power by August 31st.

The highest wind gusts recorded during Irene were 57 mph in Mount Pocono (Monroe County), 53 mph in Allentown (Lehigh County), 52 mph at the Philadelphia International Airport (Philadelphia County), 48 mph in Reading (Berks County), 46 mph in Coatesville (Chester County), 45 mph in Northeast Philadelphia (Philadelphia County), 44 mph in Pottstown (Montgomery County), 44 mph in Newbold (Bucks County) and 40 mph in Quakertown (Bucks County). The high tide in Philadelphia reached 9.89 feet above mean lower low water during the early morning of the 28th. Moderate tidal flooding begins at 9.20 feet above mean lower low water.

Hurricane Irene formed east of the Leeward Islands on Saturday the 20th. It moved northeast and passed over Puerto Rico overnight on the 21st. As Irene moved off the island, it intensified into a hurricane. Irene just bypassed the island of Hispaniola to its north and then passed over the Eastern Bahamas on the 25th as it reached category three hurricane strength. From the Bahamas, Irene moved nearly due north and slowly weakened to a category two hurricane on the 26th and a category one hurricane on the 27th. Irene made her initial landfall near Cape Lookout, North Carolina at 8 a.m. EDT on the 27th and then proceeded to the northnortheast and went back over the Atlantic Ocean near the Virginia and North Carolina border at 7 p.m. EDT on the 27th. From there Irene paralleled the Delmarva Peninsula and the center passed about 15 miles east of Delaware between 3 a.m. and 4 a.m. EDT on the 28th. Irene made her second landfall as a tropical storm on Brigantine Island, just north of Atlantic City, New Jersey at 535 a.m. EDT on the 28th. From there the center of Irene moved along eastern parts of Ocean and Monmouth Counties and was located near Tinton Falls Township in Monmouth County at 8 a.m. EDT on the 28th. At about 9 a.m. EDT the center of Irene passed over New York City.

Irene helped shatter all time monthly precipitation records. In Philadelphia, the 19.31 inches of rain established a new all-time August as well as monthly record. It was nearly half of the normal yearly precipitation total. A new August as well as all-time monthly rainfall record of 13.47 inches was also established in Allentown.

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 Philadelphia/Mount Holly wrote its last area forecast discussion before the first event at Aug 27, 3:54 PM EST, 3 hours 6 minutes earlier.

Area forecast discussion, Aug 27, 3:54 PM EST, 3 hours 6 minutes before

AREA FORECAST DISCUSSION...CORRECTED
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
454 PM EDT SAT AUG 27 2011

.SYNOPSIS...
HURRICANE IRENE WILL CONTINUE TO TRACK NORTHWARD ALONG THE MID
ATLANTIC COAST THROUGH SUNDAY BEFORE PUSHING INTO THE NEW ENGLAND
STATES. A HIGH PRESSURE SYSTEM TO OUR WEST WILL THEN SPREAD ITS
INFLUENCE INTO OUR REGION DURING MONDAY. HIGH PRESSURE AND A
PERIOD OF CALMER WEATHER IS EXPECTED THROUGH MUCH OF THE UPCOMING
WEEK.

&&

.NEAR TERM /UNTIL 6 AM SUNDAY MORNING/...
THIS AFTERNOON, IRENE WAS JUST NORTHWEST OF CAPE HATTERAS AND
REMAINED A CATEGORY ONE HURRICANE. IT WAS MAINTAINING ITS CORE
DESPITE BEING CENTERED JUST INLAND AND WE ONLY WERE SEEING A LITTLE
BIT OF DRY AIR WRAPPING AROUND THE SYSTEM. WE HAD RECEIVED REPORTS
OF IN EXCESS OF 3 INCHES OF RAIN OVER PARTS OF THE MARYLAND EASTERN
SHORE AS OF EARLY THIS AFTERNOON. MEANWHILE, WE CONTINUED TO SEE A
DEW POINT DISCONTINUITY HANGING NEAR OUR NORTHWESTERN ZONES THAT
DID NOT LOOK ATTRIBUTABLE ONLY TO ELEVATION. WE THEREFORE CONTINUE
THE FORECAST OF COPIOUS RAINFALL OVERNIGHT. GUSTS IN EXCESS OF 40
KNOTS WERE JUST ON OUR DOORSTEP TO THE SOUTH, AND THE STORM REMAINED
OVER 200 MILES TO THE SOUTH. WE MAINTAIN CONTINUITY ON THE WIND
FORECAST ALSO. WE HADN'T RECENTLY SEEN ANY SMALL SCALE CIRCULATIONS
ON THE RADAR, BUT THEY REMAIN A POSSIBILITY ALONG THE IMMEDIATE
COAST AS LONG AS THE BANDS OF IRENE CONTINUE TO POUND US.
TEMPERATURES IN THE WAKE OF IRENE WARMED UP CONSIDERABLY OVER SOUTH
CAROLINA THANKS TO COMPRESSIONAL HEATING. WITH THE STORM MOVING TO
OUR LATITUDE BY AROUND DAYBREAK, WE DON'T EXPECT ANYTHING QUITE SO
DRAMATIC, BUT WE WENT WITH MILDER OVERNIGHT MINS.

&&

.SHORT TERM /6 AM SUNDAY MORNING THROUGH SUNDAY NIGHT/...
WE MAY BE A LITTLE SLOW CLEARING IRENE OUT OF OUR AREA WITH THIS
PACKAGE, BUT IN ANY EVENT WE EXPECT RAIN TO END DURING THE COURSE OF
THE DAY. RATHER ROBUST WINDS ON THE BACK SIDE OF THE SYSTEM ARE
EXPECTED, AND WE DID RAISE OUR MAXIMUM TEMPERATURES SOME FROM
CONTINUITY IN ANTICIPATION OF SOME COMPRESSIONAL HEATING. SUNDAY
NIGHT SHOULD BE DRY WITH DIMINISHING WINDS. CONTINUITY WAS
MAINTAINED ON THE MINIMUM TEMPERATURES.

&&

.LONG TERM /MONDAY THROUGH SATURDAY/...
AS IRENE EXITS INTO THE NEW ENGLAND STATES AND EASTERN CANADA ON
MONDAY, AN AREA OF HIGH PRESSURE AROUND THE SOUTHERN GREAT LAKES
WILL BEGIN BUILDING EASTWARD. A LIGHT NORTHWESTERLY FLOW WITH AMPLE
SUN IS EXPECTED FOR THE REGION MONDAY. OF NOTE IN THE MID TO UPPER
LEVELS, A WEAK TROUGH WILL APPROACH THE AREA MONDAY AND PASS BY
DURING TUESDAY. THIS WILL SERVE TO GIVE US A LITTLE MORE CLOUD COVER
FOR TUESDAY, BUT OTHERWISE THE QUIET PATTERN CONTINUES. THE SURFACE
HIGH PRESSURE EXPANDS ACROSS OUR REGION AND INTO THE NORTHEASTERN
STATES DURING WEDNESDAY AND THURSDAY AS AN UPPER LEVEL RIDGE TAKES
SHAPE OVER THE CENTER OF THE COUNTRY. THE MODELS SHOW HIGH PRESSURE
MOVING OFF THE EAST COAST BY FRIDAY AS AN AREA OF LOW PRESSURE
ORGANIZES OVER THE NORTHERN PLAINS STATES. THIS LOW PRESSURE IS
FORECAST TO TRACK INTO SOUTHEASTERN CANADA DURING SATURDAY WITH A
COLD FRONT EXPECTED TO CROSS THE GREAT LAKES AND APPROACH OUR REGION
AT THE END OF THE LONG TERM PERIOD. TEMPERATURES THROUGH THIS
TIMEFRAME WILL BE NEAR NORMAL WITH MAXIMUM TEMPS GENERALLY RANGING
FROM THE UPPER 70S TO THE LOWER 80S. FOR THE MOST PART, HPC GUIDANCE
WAS GENERALLY ACCEPTED AND USED.

&&

.AVIATION /20Z SATURDAY THROUGH THURSDAY/...
THE FOLLOWING DISCUSSION IS FOR KPHL, KPNE, KTTN, KABE, KRDG, KILG,
KMIV, KACY AND SURROUNDING AREAS.

WE ARE FORECASTING TROPICAL STORM FORCE WINDS OVERNIGHT AT ALL THE
TAF SITES, WITH WINDS GRADUALLY BACKING FROM EAST NORTHEAST TO NORTH
NORTHWEST. WE CONTINUE TO BACK THEM TO WEST NORTHWEST ON SUNDAY. IFR
CONDITIONS IN RAIN, HEAVY AT TIMES, ARE FORECAST AT ALL SITES. THOSE
IFR CONDITIONS ARE EXPECTED TO END AROUND DAYBREAK OR SHORTLY
THEREAFTER, ALTHOUGH THE WINDS WILL REMAIN STRONG FOR A GOOD PART OF
THE DAY.

OUTLOOK...
HIGH PRESSURE IS EXPECTED TO DOMINATE THE WEATHER PATTERN FOR OUR
REGION FROM MONDAY THROUGH THURSDAY. DRY WEATHER IS FORECAST THROUGH
THIS PERIOD WITH GENERALLY LIGHT WINDS AND VFR CONDITIONS. THE
OVERNIGHT/EARLY MORNING PART OF EACH DAY MAY YIELD POSSIBLE
VISIBILITY RESTRICTIONS AS FOG COULD DEVELOP WITH THE MAINLY CLEAR
CONDITIONS AND LIGHT WINDS.

&&

.MARINE...
A HURRICANE WARNING REMAINS IN EFFECT FOR ALL ZONES. TROPICAL STORM
FORCE HAVE JUST ARRIVED OVER OUR FAR SOUTHERN WATERS, AND HURRICANE
FORCE WINDS STILL ARE FORECAST. IRENE IS FORECAST TO MOVE TO THE NEW
JERSEY COASTLINE BY DAYBREAK AND THEN LIFT NORTHEAST WITH A ROBUST
WRAP AROUND WIND. WE MAINTAIN OUR SEAS FORECAST OF SEAS PEAKING
AROUND OR A BIT IN EXCESS OF 20 FEET OVER THE ATLANTIC AND 5 TO 9
FEET OVER THE BAY.

THE CONDITIONS ARE EXPECTED TO IMPROVE SUNDAY NIGHT INTO MONDAY AS
THE SYSTEM MOVES WELL TO OUR NORTH AND THE PRESSURE GRADIENT EASES
SIGNIFICANTLY. THE OFFSHORE WINDS IN THE WAKE OF IRENE SHOULD ALLOW
THE SEAS TO SUBSIDE FAIRLY QUICKLY OVERALL.

OUTLOOK...
HIGH PRESSURE GRADUALLY BUILDS INTO THE MID ATLANTIC REGION AND OUR
COASTAL WATERS DURING MONDAY. FOR THE OCEAN WATERS, WAVE HEIGHTS ARE
EXPECTED TO STAY HIGH AS IRENE PULLS AWAY INTO THE NORTHEAST STATES,
BUT THESE WAVE HEIGHTS WILL GRADUALLY DIMINISH GOING INTO TUESDAY.
WINDS ARE EXPECTED TO BE MAINLY LESS THAN 15 KNOTS FOR THE COASTAL
WATERS OF DELAWARE AND NEW JERSEY BY MONDAY. WITH HIGH PRESSURE
REMAINING OVER THE AREA THROUGH THURSDAY, WINDS IN THIS RANGE WILL
CONTINUE FOR THE WATERS.

&&

.HYDROLOGY...
HEAVY AND POSSIBLY RECORD SETTING RAINFALL TODAY AND SUNDAY MAY
RESULT IN MAJOR FLOODING ACROSS THE AREA. THUS FAR LATE TODAY,
RAINFALL MEASUREMENTS FROM SPOTTERS ACROSS THE AREA SHOW THAT
ANYWHERE FROM 1 TO 3 INCHES OF RAIN HAVE FALLEN ACROSS PORTIONS OF
MARYLAND, DELAWARE, AND SOUTHERN NEW JERSEY. HEAVY RAIN CONTINUES
TO SPREAD NORTHWARD AS THE OUTER BANDS OF IRENE SPIN INTO THE REGION.

THE PW VALUES FORECAST ACROSS THE REGION ARE RATHER IMPRESSIVE
WITH 2.0-2.5 INCHES OVERSPREADING THE REGION TODAY INTO SUNDAY.
IF THE CENTER GETS CLOSE ENOUGH TO THE COAST, SOME GUIDANCE
INDICATES THE PW VALUES INCREASE TO JUST OVER 3.0 INCHES. THIS
AMOUNT OF MOISTURE IN THE ATMOSPHERE WILL LEAD TO EXCESSIVE
RAINFALL RATES AND TOTALS. THIS COMBINED WITH ANY UPSLOPE
ENHANCEMENT AND/OR LOCALLY ENHANCED CONVERGENCE/BANDING WILL ADD
TO THE RAIN RATES. THE INITIAL INFLUX OF THIS HIGHER MOISTURE
CONTENT AIR ALONG WITH THE PRESENCE OF A STATIONARY FRONT WILL LEAD
TO BOUTS OF LOCALLY VERY HEAVY DOWNPOURS WELL BEFORE THE HURRICANE
GETS TO OUR LATITUDE.

SMALLER CREEKS AND STREAMS WILL BE HIGHLY SUSCEPTIBLE TO RAPID
FLOODING. THE RARITAN AND SCHUYLKILL RIVERS HAVE THE POTENTIAL TO
REACT RATHER QUICKLY AND ALSO ARE HIGHLY SUSCEPTIBLE TO FLOODING.
THE DELAWARE, SUSQUEHANNA, RANCOCAS AND PASSAIC RIVERS REACT MORE
SLOWLY, BUT THEY ALSO ARE HIGHLY SUSCEPTIBLE TO FLOODING. IN
ADDITION, THE WINDSWEPT RAIN WILL LIKELY PRODUCE URBAN AND POOR
DRAINAGE FLOODING. THE STRONG ONSHORE FLOW COMBINED WITH THE TIDES
WILL TEND TO BACK WATER UP, COMPLICATING FLOODING PROBLEMS. GIVEN
THE QPF FORECAST /6 TO 10 INCHES WITH LOCALLY UP TO 12 INCHES/ AND
THE ANTECEDENT CONDITIONS, THE FLOOD WATCH REMAINS IN EFFECT AND
WE CONTINUE TO CARRY A HEAVY RAIN MENTION IN THE FORECAST.

&&

.TIDES/COASTAL FLOODING...
THE THREAT OF MODERATE TO SEVERE COASTAL FLOODING REMAINS HIGH OVER
THE WEEKEND AS HURRICANE IRENE IMPACTS OUR REGION. THE SUNDAY
MORNING HIGH TIDE ALONG THE OCEANFRONT RARITAN BAY AND DELAWARE
BAY IS OF MOST CONCERN. HOWEVER, WITH THE STRENGTH OF THE STORM,
COASTAL FLOODING MAY VERY WELL BE AN ISSUE FOR HOURS BEFORE AND
AFTER THE HIGH TIDE OCCURS.

WITH WATER EXPECTED TO BE PUSHED UP DELAWARE BAY, FLOODING IS ALSO A
CONCERN FOR THE TIDAL PORTION OF THE DELAWARE RIVER.

COASTAL FLOODING ISSUES MAY LINGER INTO THE SUNDAY EVENING HIGH
TIDE, ESPECIALLY ALONG THE NORTHERN PART OF THE NEW JERSEY COAST AND
ALONG RARITAN BAY.

A CAVEAT TO THIS IS THE THREAT OVER THE NORTHERN CHESAPEAKE BAY.
IT DOES NOT APPEAR THAT WE WILL SEE MINOR TIDAL FLOODING WITH THE
AFTERNOON/EVENING HIGH TIDE TODAY, AND WINDS MAY SHIFT TO
NORTHWEST PRIOR TO THE OVERNIGHT HIGH TIDE. THE GREATEST THREAT TO
OUR PORTION OF THE MARYLAND EASTERN SHORE WOULD BE SOUTH AT TALBOT
AND CAROLINE COUNTIES, WHERE PERHAPS MODERATE TIDAL FLOODING STILL
WILL OCCUR.

&&

.RIP CURRENTS...
DANGEROUS RIP CURRENTS ASSOCIATED WITH HURRICANE IRENE ARE
ANTICIPATED THROUGH THE ENTIRE WEEKEND.

&&

.EQUIPMENT...
TECHNICIANS CONTINUE TO WORK STEADILY ON THE FORT DIX, NEW JERSEY
/KDIX/ DOPPLER RADAR, WHICH FAILED OVERNIGHT.

&&

.PHI WATCHES/WARNINGS/ADVISORIES...
PA...FLOOD WATCH THROUGH SUNDAY EVENING FOR PAZ054-055-060>062-
     067>071.
     TROPICAL STORM WARNING FOR PAZ054-055-060>062-067>069.
     HURRICANE WARNING FOR PAZ070-071.
NJ...FLOOD WATCH THROUGH SUNDAY EVENING FOR NJZ001-007>010-012>027.
     TROPICAL STORM WARNING FOR NJZ001-007>010-015.
     HURRICANE WARNING FOR NJZ012>014-016>027.
DE...FLOOD WATCH THROUGH SUNDAY EVENING FOR DEZ001>004.
     HURRICANE WARNING FOR DEZ001>004.
MD...FLOOD WATCH THROUGH SUNDAY EVENING FOR MDZ008-012-015-019-020.
     TROPICAL STORM WARNING FOR MDZ008-012-015.
     HURRICANE WARNING FOR MDZ019-020.
MARINE...HURRICANE WARNING FOR ANZ430-431-450>455-470.
&&

SYNOPSIS...KLINE
NEAR TERM...DELISI
SHORT TERM...DELISI
LONG TERM...KLINE
AVIATION...DELISI/KLINE
MARINE...DELISI/KLINE
HYDROLOGY...GORSE/KLINE/GAINES
TIDES/COASTAL FLOODING...DELISI
RIP CURRENTS...IOVINO
EQUIPMENT...IOVINO/DELISI

Hazardous weather outlook, Aug 27, 2:48 PM EST, 4 hours 12 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
348 PM EDT SAT AUG 27 2011

MDZ008-NJZ001-007>010-015-PAZ054-055-060>062-067>069-281000-
CECIL-SUSSEX-WARREN-MORRIS-HUNTERDON-SOMERSET-MERCER-CARBON-MONROE-
BERKS-LEHIGH-NORTHAMPTON-CHESTER-MONTGOMERY-BUCKS-
348 PM EDT SAT AUG 27 2011

...FLOOD WATCH IN EFFECT THROUGH SUNDAY EVENING...
...TROPICAL STORM WARNING IN EFFECT...

THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHEAST MARYLAND...CENTRAL
NEW JERSEY...NORTHERN NEW JERSEY...NORTHWEST NEW JERSEY...EAST
CENTRAL PENNSYLVANIA...NORTHEAST PENNSYLVANIA AND SOUTHEAST
PENNSYLVANIA.

.DAY ONE...THIS AFTERNOON AND TONIGHT.

PLEASE LISTEN TO NOAA WEATHER RADIO OR GO TO WEATHER.GOV ON THE
INTERNET FOR MORE INFORMATION ABOUT THE FOLLOWING HAZARDS.

   FLOOD WATCH.
   TROPICAL STORM WARNING.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY.

PLEASE LISTEN TO NOAA WEATHER RADIO OR GO TO WEATHER.GOV ON THE
INTERNET FOR MORE INFORMATION ABOUT THE FOLLOWING HAZARDS.

   FLOOD WATCH.
   TROPICAL STORM WARNING.

.SPOTTER INFORMATION STATEMENT...

WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER
CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES.

NJZ012>014-017>020-026-027-PAZ070-071-281000-
MIDDLESEX-WESTERN MONMOUTH-EASTERN MONMOUTH-GLOUCESTER-CAMDEN-
NORTHWESTERN BURLINGTON-OCEAN-COASTAL OCEAN-SOUTHEASTERN BURLINGTON-
DELAWARE-PHILADELPHIA-
348 PM EDT SAT AUG 27 2011

...FLOOD WATCH IN EFFECT THROUGH SUNDAY EVENING...
...HURRICANE WARNING IN EFFECT...

THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL NEW JERSEY...NORTHERN
NEW JERSEY...SOUTHERN NEW JERSEY AND SOUTHEAST PENNSYLVANIA.

.DAY ONE...THIS AFTERNOON AND TONIGHT.

PLEASE LISTEN TO NOAA WEATHER RADIO OR GO TO WEATHER.GOV ON THE
INTERNET FOR MORE INFORMATION ABOUT THE FOLLOWING HAZARDS.

   FLOOD WATCH.
   HURRICANE WARNING.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY.

PLEASE LISTEN TO NOAA WEATHER RADIO OR GO TO WEATHER.GOV ON THE
INTERNET FOR MORE INFORMATION ABOUT THE FOLLOWING HAZARDS.

   FLOOD WATCH.
   HURRICANE WARNING.

.SPOTTER INFORMATION STATEMENT...

WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER
CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES.

DEZ001>004-MDZ019-020-NJZ016-021>025-281000-
NEW CASTLE-KENT-INLAND SUSSEX-DELAWARE BEACHES-TALBOT-CAROLINE-SALEM-
CUMBERLAND-ATLANTIC-CAPE MAY-ATLANTIC COASTAL CAPE MAY-
COASTAL ATLANTIC-
348 PM EDT SAT AUG 27 2011

...FLOOD WATCH IN EFFECT THROUGH SUNDAY EVENING...
...TORNADO WATCH 811 IN EFFECT UNTIL 8 PM EDT THIS EVENING...
...HURRICANE WARNING IN EFFECT...

THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL DELAWARE...NORTHERN
DELAWARE...SOUTHERN DELAWARE...NORTHEAST MARYLAND AND SOUTHERN NEW
JERSEY.

.DAY ONE...THIS AFTERNOON AND TONIGHT.

PLEASE LISTEN TO NOAA WEATHER RADIO OR GO TO WEATHER.GOV ON THE
INTERNET FOR MORE INFORMATION ABOUT THE FOLLOWING HAZARDS.

   FLOOD WATCH.
   TORNADO WATCH.
   HURRICANE WARNING.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY.

PLEASE LISTEN TO NOAA WEATHER RADIO OR GO TO WEATHER.GOV ON THE
INTERNET FOR MORE INFORMATION ABOUT THE FOLLOWING HAZARDS.

   FLOOD WATCH.
   HURRICANE WARNING.

.SPOTTER INFORMATION STATEMENT...

WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER
CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES.

MDZ012-015-281000-
KENT MD-QUEEN ANNES-
348 PM EDT SAT AUG 27 2011

...FLOOD WATCH IN EFFECT THROUGH SUNDAY EVENING...
...TORNADO WATCH 811 IN EFFECT UNTIL 8 PM EDT THIS EVENING...
...TROPICAL STORM WARNING IN EFFECT...

THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHEAST MARYLAND.

.DAY ONE...THIS AFTERNOON AND TONIGHT.

PLEASE LISTEN TO NOAA WEATHER RADIO OR GO TO WEATHER.GOV ON THE
INTERNET FOR MORE INFORMATION ABOUT THE FOLLOWING HAZARDS.

   FLOOD WATCH.
   TORNADO WATCH.
   TROPICAL STORM WARNING.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY.

PLEASE LISTEN TO NOAA WEATHER RADIO OR GO TO WEATHER.GOV ON THE
INTERNET FOR MORE INFORMATION ABOUT THE FOLLOWING HAZARDS.

   FLOOD WATCH.
   TROPICAL STORM WARNING.

.SPOTTER INFORMATION STATEMENT...

WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER
CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES.

ANZ430-431-452>455-281000-
DELAWARE BAY WATERS NORTH OF EAST POINT NJ TO SLAUGHTER BEACH DE-
DELAWARE BAY WATERS SOUTH OF EAST POINT NJ TO SLAUGHTER BEACH DE-
COASTAL WATERS FROM LITTLE EGG INLET TO GREAT EGG INLET NJ OUT 20 NM-
COASTAL WATERS FROM GREAT EGG INLET TO CAPE MAY NJ OUT 20 NM-
COASTAL WATERS FROM CAPE MAY NJ TO CAPE HENLOPEN DE OUT 20 NM-
COASTAL WATERS FROM CAPE HENLOPEN TO FENWICK ISLAND DE OUT 20 NM-
348 PM EDT SAT AUG 27 2011

...TORNADO WATCH 811 IN EFFECT UNTIL 8 PM EDT THIS EVENING...
...HURRICANE WARNING IN EFFECT...

THIS HAZARDOUS WEATHER OUTLOOK IS FOR ATLANTIC COASTAL WATERS AND
DELAWARE BAY WATERS.

.DAY ONE...THIS AFTERNOON AND TONIGHT.

PLEASE LISTEN TO NOAA WEATHER RADIO OR GO TO WEATHER.GOV ON THE
INTERNET FOR MORE INFORMATION ABOUT THE FOLLOWING HAZARDS.

   TORNADO WATCH.
   HURRICANE WARNING.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY.

PLEASE LISTEN TO NOAA WEATHER RADIO OR GO TO WEATHER.GOV ON THE
INTERNET FOR MORE INFORMATION ABOUT THE FOLLOWING HAZARDS.

   HURRICANE WARNING.

.SPOTTER INFORMATION STATEMENT...

WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER
CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES.

ANZ450-451-281000-
COASTAL WATERS FROM SANDY HOOK TO MANASQUAN INLET NJ OUT 20 NM-
COASTAL WATERS FROM MANASQUAN INLET TO LITTLE EGG INLET NJ OUT 20 NM-
348 PM EDT SAT AUG 27 2011

...HURRICANE WARNING IN EFFECT...

THIS HAZARDOUS WEATHER OUTLOOK IS FOR ATLANTIC COASTAL WATERS.

.DAY ONE...THIS AFTERNOON AND TONIGHT.

PLEASE LISTEN TO NOAA WEATHER RADIO OR GO TO WEATHER.GOV ON THE
INTERNET FOR MORE INFORMATION ABOUT THE FOLLOWING HAZARDS.

   HURRICANE WARNING.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY.

PLEASE LISTEN TO NOAA WEATHER RADIO OR GO TO WEATHER.GOV ON THE
INTERNET FOR MORE INFORMATION ABOUT THE FOLLOWING HAZARDS.

   HURRICANE WARNING.

.SPOTTER INFORMATION STATEMENT...

WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER
CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES.

In the hours before

Special weather statement, Aug 27, 5:14 PM EST, 1 hour 46 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
614 PM EDT SAT AUG 27 2011

DEZ002>004-272245-
DELAWARE BEACHES DE-INLAND SUSSEX DE-KENT DE-
614 PM EDT SAT AUG 27 2011

...A SHOWER WITH STRONG WIND GUSTS WILL AFFECT KENT AND SUSSEX
COUNTIES...

AT 611 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SHOWER WITH STRONG WIND GUSTS 16 MILES SOUTH OF CAPE MAY...MOVING
WEST AT 75 MPH. THE SHOWER WILL BE NEAR HENLOPEN ACRES...REHOBOTH
BEACH...DEWEY BEACH AROUND 620 PM...LEWES AROUND 625 PM...MILTON
AROUND 630 PM...ELLENDALE...SLAUGHTER BEACH AROUND 635 PM...
HOUSTON...MILFORD AROUND 640 PM AND FARMINGTON AROUND 645 PM.

VERY HEAVY RAINFALL WILL OCCUR OVER AREAS THAT RECEIVED HEAVY RAINS
EARLIER. BE ALERT FOR THE POSSIBILITY OF LOCALIZED FLOODING.

WIND GUSTS BETWEEN 60 AND 70 MPH ARE POSSIBLE WITH THIS SHOWER.

LAT...LON 3877 7568 3900 7567 3892 7529 3889 7525
      3883 7521 3880 7516 3879 7511 3881 7509
      3880 7507 3868 7506

FORECASTER:DRAG

Local storm report, Aug 27, 5:33 PM EST, 1 hour 27 minutes before

PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
633 PM EDT SAT AUG 27 2011

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

0620 PM     TSTM WND GST     GEORGETOWN              38.69N  75.39W
08/27/2011  M58 MPH          SUSSEX             DE   NWS OFFICE

            WIND GUST MEASURED AT SITE GED

&&

EVENT NUMBER PHI1100643

GAINES

Local storm report, Aug 27, 5:59 PM EST, 1 hour 1 minute before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
659 PM EDT SAT AUG 27 2011

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

0615 PM     NON-TSTM WND DMG FRANKFORD               38.52N  75.23W
08/27/2011                   SUSSEX             DE   PUBLIC

            TREES DOWN

&&

EVENT NUMBER PHI1100644

GAINES

Local storm report, Aug 27, 6:30 PM EST, 30 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
730 PM EDT SAT AUG 27 2011

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

0230 PM     NON-TSTM WND DMG WOODBINE                39.23N  74.81W
08/27/2011                   CAPE MAY           NJ   TRAINED SPOTTER

            TREES DOWN

&&

EVENT NUMBER PHI1100645

GAINES

Local storm report, Aug 27, 6:32 PM EST, 28 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
732 PM EDT SAT AUG 27 2011

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

0727 PM     NON-TSTM WND DMG DENNIS TWP              39.18N  74.82W
08/27/2011                   CAPE MAY           NJ   TRAINED SPOTTER

            TREES DOWN

&&

EVENT NUMBER PHI1100646

GAINES

Local storm report, Aug 27, 7:00 PM EST, 0 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
800 PM EDT SAT AUG 27 2011

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

0747 PM     NON-TSTM WND GST LEWES                   38.78N  75.15W
08/27/2011  M56 MPH          SUSSEX             DE   TRAINED SPOTTER

&&

EVENT NUMBER PHI1100647

GAINES

The radar

The Philadelphia radar (KDIX), 84 km away, was scanning. The volume nearest the first event began at 01:57 UTC.

Open the radar archive at this moment

Event by event

10 tropical storm, 10 flash flood, 10 flood, 2 storm surge/tide. Local standard time, as filed.

Tropical Storm, Bucks

When: August 27, 7:00 PM EST to August 28, 4:00 PM EST
Where: Bucks forecast zone
Property damage: $700,000
Reported by: Mesonet

Tropical Storm, Chester

When: August 27, 7:00 PM EST to August 28, 4:00 PM EST
Where: Chester forecast zone
Property damage: $850,000
Reported by: Mesonet

Tropical Storm, Delaware

When: August 27, 7:00 PM EST to August 28, 4:00 PM EST
Where: Delaware forecast zone
Property damage: $500,000
Reported by: Mesonet
Coordinates: 39.917, -75.399 (the zone’s center; the record gives no point)

Tropical Storm, Montgomery

When: August 27, 7:00 PM EST to August 28, 4:00 PM EST
Where: Montgomery forecast zone
Property damage: $100,000
Reported by: Mesonet

Tropical Storm, Philadelphia

When: August 27, 7:00 PM EST to August 28, 4:00 PM EST
Where: Philadelphia forecast zone
Property damage: $10,000
Reported by: Mesonet
Coordinates: 40.008, -75.134 (the zone’s center; the record gives no point)

Storm Surge/Tide, Delaware

When: August 27, 8:00 PM EST to August 28, 4:00 AM EST
Where: Delaware forecast zone
Reported by: Mesonet
Coordinates: 39.917, -75.399 (the zone’s center; the record gives no point)

Flash Flood, Philadelphia

When: August 27, 8:57 PM EST to August 28, 9:00 AM EST
Where: Philadelphia County, 0.55 mi NW of Byberry to 5.31 mi W of Chestnut Hill
Cause: Heavy Rain / Tropical System
Reported by: Emergency Manager
Coordinates: 40.124, -75.008

Storm Surge/Tide, Philadelphia

When: August 27, 9:00 PM EST to August 28, 4:00 AM EST
Where: Philadelphia forecast zone
Reported by: Mesonet
Coordinates: 40.008, -75.134 (the zone’s center; the record gives no point)

Tropical Storm, Lehigh

When: August 27, 9:00 PM EST to August 28, 4:00 PM EST
Where: Lehigh forecast zone
Property damage: $500,000
Reported by: Mesonet
Coordinates: 40.613, -75.592 (the zone’s center; the record gives no point)

Tropical Storm, Northampton

When: August 27, 9:00 PM EST to August 28, 4:00 PM EST
Where: Northampton forecast zone
Property damage: $750,000
Reported by: Mesonet
Coordinates: 40.754, -75.307 (the zone’s center; the record gives no point)

Flash Flood, Delaware

When: August 27, 9:15 PM EST to August 28, 9:00 AM EST
Where: Delaware County, 0.5 mi NW of Chadds Ford to 1 mi S of Hambys Corner
Cause: Heavy Rain / Tropical System
Reported by: Emergency Manager
Coordinates: 39.875, -75.577

Flash Flood, Chester

When: August 27, 9:22 PM EST to August 28, 8:00 AM EST
Where: Chester County, 2 mi W of Honey Brook to 2 mi SSW of Nottingham
Cause: Heavy Rain / Tropical System
Reported by: Emergency Manager
Coordinates: 40.100, -75.958

Flash Flood, Montgomery

When: August 27, 9:40 PM EST to August 28, 9:00 AM EST
Where: Montgomery County, Stowe to Bala Cynwyd
Cause: Heavy Rain / Tropical System
Reported by: Emergency Manager
Coordinates: 40.250, -75.680

Flash Flood, Bucks

When: August 27, 10:07 PM EST to August 28, 9:00 AM EST
Where: Bucks County, 2 mi NW of Quakertown to 2 mi SSW of Tradesville
Cause: Heavy Rain / Tropical System
Reported by: Emergency Manager
Coordinates: 40.471, -75.357

Tropical Storm, Berks

When: August 27, 11:00 PM EST to August 28, 1:00 PM EST
Where: Berks forecast zone
Reported by: Mesonet
Coordinates: 40.416, -75.926 (the zone’s center; the record gives no point)

Tropical Storm, Monroe

When: August 28, 12:00 AM EST to 5:00 PM EST
Where: Monroe forecast zone
Deaths: 1 direct, 0 indirect
Property damage: $175,000
Reported by: Mesonet
Coordinates: 41.058, -75.339 (the zone’s center; the record gives no point)

Tropical Storm, Carbon

When: August 28, 12:00 AM EST to 5:00 PM EST
Where: Carbon forecast zone
Reported by: Mesonet
Coordinates: 40.918, -75.709 (the zone’s center; the record gives no point)

Flash Flood, Northampton

When: August 28, 1:02 AM EST to 11:00 AM EST
Where: Northampton County, 1 mi N of Walnutport to 1 mi W of Northampton
Cause: Heavy Rain / Tropical System
Reported by: Emergency Manager
Coordinates: 40.764, -75.580

Flash Flood, Berks

When: August 28, 3:08 AM EST to 9:00 AM EST
Where: Berks County, 5 mi WNW of Bethel to 5 mi SSE of Morgantown
Cause: Heavy Rain / Tropical System
Reported by: Emergency Manager
Coordinates: 40.498, -76.388

Flash Flood, Lehigh

When: August 28, 3:09 AM EST to 11:00 AM EST
Where: Lehigh County, 1 mi NE of Slatington to 1 mi W of Jacksonville
Cause: Heavy Rain / Tropical System
Reported by: Emergency Manager
Coordinates: 40.760, -75.587

Flash Flood, Carbon

When: August 28, 6:00 AM EST to 1:00 PM EST
Where: Carbon County, 2.16 mi SSE of Beaver Meadows to 5 mi SSW of Hauto
Cause: Heavy Rain / Tropical System
Reported by: Emergency Manager
Coordinates: 40.900, -75.888

Flash Flood, Monroe

When: August 28, 6:21 AM EST to 1:00 PM EST
Where: Monroe County, 2.1 mi NNW of Blakeslee to 5.57 mi S of Blakeslee
Cause: Heavy Rain / Tropical System
Reported by: Emergency Manager
Coordinates: 41.130, -75.628

Flood, Philadelphia

When: August 28, 9:00 AM EST to August 29, 12:04 AM EST
Where: Philadelphia County, 0.55 mi NW of Byberry to 4.93 mi NNW of Chestnut Hill
Cause: Heavy Rain / Tropical System
Property damage: $100,000
Reported by: Emergency Manager
Coordinates: 40.124, -75.008

The Schuylkill River flooded businesses in the Manayunk section of the city. Lincoln Drive was flooded by the Wissahickon Creek. The heavy rain caused the collapse of seven buildings and damage to thirteen other structures within the city.

The Schuylkill River in Philadelphia had moderate flooding and its seventh highest crest on record, highest since Hurricane Floyd in 1999. The river was above its 11 foot flood stage from 339 a.m. EDT on the 28th through 104 a.m. EDT on the 29th. It crested at 13.57 feet at 145 p.m. EDT on the 28th.

The Wissahickon Creek at its mouth had major flooding, tied its second highest crest on record and was the highest crest since late September of 2004. It was above its 5 foot flood stage from 1022 p.m. EDT on the 27th through 605 p.m. EDT on the 28th. It crested at 10.54 feet at 700 a.m. EDT on the 28th.

The Pennypack Creek at the Rhawn Street Bridge had moderate flooding and was above its 7 foot flood stage from 945 p.m. EDT on the 27th through 245 p.m. EDT on the 28th. It crested at 9.39 feet at 1045 p.m. EDT on the 27th. The Frankford Creek at Castor Avenue had major flooding and the second highest crest on record (behind the remnants of Hurricane Jeanne in late September 2004). It was above its 7 foot flood stage from 957 p.m. EDT on the 27th through 414 a.m. EDT on the 28th. It crested at 13.15 feet at 1145 p.m. EDT on the 27th.

Event rainfall totals included 6.97 inches in Rockledge, 6.89 inches in Lawndale, 6.70 inches in Wyndmoor, 6.49 inches in Philadelphia, 6.16 inches at the Northeast Philadelphia Airport and 5.70 inches at the Philadelphia International Airport.

Flood, Delaware

When: August 28, 9:00 AM EST to August 29, 3:20 AM EST
Where: Delaware County, 1 mi N of Chadds Ford to 1 mi S of Hambys Corner
Cause: Heavy Rain / Tropical System
Property damage: $250,000
Reported by: Emergency Manager
Coordinates: 39.885, -75.570

The Darby Creek flooded businesses along MacDade Boulevard in Darby. The sides of a few buildings were washed away.

The Brandywine Creek at Chadds Ford had major flooding and its third highest crest on record, the highest since Hurricane Floyd in September of 1999. The creek was above its 9 foot flood stage from 1244 a.m. EDT on the 28th through 420 a.m. EDT on the 29th. It crested at 15.23 feet at 115 p.m. EDT on the 28th. The Crum Creek at Newtown Square had record breaking major flooding. The creek was above its 6 foot flood stage from 1015 p.m. EDT on the 27th through 1156 a.m. EDT on the 28th. It crested at 12.24 feet at 215 a.m. EDT on the 28th. The Chester Creek at Chester had major flooding, its fifth highest crest on record and the highest crest since the remnants of Hurricane Jeanne in late September of 2004. The creek was above its 8 foot flood stage from 1015 p.m. EDT on the 27th through 356 p.m. EDT on the 28th. It crested at 15.76 feet at 245 a.m. EDT on the 28th.

Event rainfall totals included 6.79 inches in Aston Township, 6.52 inches in Drexel Hill and 5.79 inches in Chadds Ford.

Flood, Chester

When: August 28, 9:00 AM EST to August 29, 3:20 AM EST
Where: Chester County, 2 mi SW of Oxford to 1.64 mi W of Honey Brook
Cause: Heavy Rain / Tropical System
Property damage: $850,000
Reported by: Emergency Manager
Coordinates: 39.760, -76.007

The West Branch of the Brandywine Creek at Honey Brook had moderate flooding and its highest crest since October of 2005. It was above its 7 foot flood stage from 237 a.m. EDT through 128 p.m. EDT on the 28th. It crested at 9.6.0 feet at 630 a.m. EDT. Farther downstream, the West Branch of the Brandywine Creek at Coatesville was above its 7 foot flood stage from 834 a.m. EDT through 126 p.m. EDT on the 28th. It crested at 7.31 feet at 11 a.m. EDT. The East Branch of the Brandywine Creek below Downingtown had moderate flooding. The creek was above its 7 foot flood stage from 218 a.m. EDT through 1222 p.m. EDT on the 28th. It crested at 9.66 feet at 715 a.m. EDT. The main stem of the Brandywine Creek at Chadds Ford had major flooding and its third highest crest on record, the highest since Hurricane Floyd in September of 1999. The creek was above its 9 foot flood stage from 1244 a.m. EDT on the 28th through 420 a.m. EDT on the 29th. It crested at 15.23 feet at 115 p.m. EDT on the 28th.

The Valley Creek at Valley Forge had major flooding and its second highest crest on record. The creek was above its 7 foot flood stage from 1022 p.m. EDT on the 27th through 105 p.m. EDT on the 28th. It crested at 13.21 feet at 245 a.m. EDT on the 28th. The White Clay Creek at Strickersville was above its 9.5 foot flood stage from 1149 p.m. EDT on the 27th through 1022 a.m. EDT on the 28th. It crested at 13.53 feet at 615 a.m. EDT. It was the fourth highest crest on record and the highest since the remnants of Hurricane Jeanne in late September of 2004. The French Creek at Phoenixville was above its 8 foot flood stage from 1242 a.m. EDT through 810 p.m. EDT on the 28th. It crested at 11.29 feet at 7 a.m. EDT.

Event rainfall totals included 6.95 inches in Spring City, 6.80 inches in Unionville, 6.46 inches in West Chester and 5.71 inches in Nottingham.

Flood, Montgomery

When: August 28, 9:00 AM EST to August 29, 12:11 AM EST
Where: Montgomery County, Pottstown to Penn Wynne
Cause: Heavy Rain / Tropical System
Deaths: 1 direct, 0 indirect
Property damage: $100,000
Reported by: Emergency Manager
Coordinates: 40.250, -75.630

A 65-year-old woman on her way to work drowned in her car in the Wissahickon Creek in Fort Washington. In addition to the gaged creeks, the Unami Creek flooded in Marlborough Township.

The Schuylkill River at Norristown had major flooding and its fourth highest crest on record, highest since Hurricane Floyd in 1999. The river was above its 13 foot flood stage from 130 a.m. EDT on the 28th through 111 a.m. EDT on the 29th. It crested at 19.76 feet at 145 p.m. EDT on the 28th.

The West Branch of the Perkiomen Creek at Hillegass was above its 5 foot flood stage from 309 a.m. EDT through 110 p.m. EDT on the 28th. It crested at 5.58 feet at 830 a.m. EDT. The East Branch of the Perkiomen Creek at Schwenksville had major flooding, its fourth highest crest on record and greatest crest since Hurricane Floyd in September of 1999. The creek was above its 7 foot flood stage from 151 a.m. EDT through 429 p.m. EDT on the 28th. It crested at 12.91 feet at 1220 p.m. EDT.

The Main Stem of the Perkiomen Creek at East Greenville had record breaking moderate flooding. The creek was above its 5 foot flood stage from 128 a.m. EDT through 254 p.m. EDT on the 28th. It crested at 7.75 feet at 715 a.m. EDT. Farther downstream, The Perkiomen Creek at Graterford had major flooding and its second highest crest since July of 1935. The creek was above its 11 foot flood stage from 326 a.m. EDT through 637 p.m. EDT on the 28th. It crested at 18.20 feet at 1145 a.m. EDT.

The Wissahickon Creek at Fort Washington had major flooding and its third highest crest on record (since June of 2001). It was above its 9 foot flood stage from 1040 p.m. EDT on the 27th through 1249 p.m. EDT on the 28th. It crested at 16.22 feet at 345 a.m. EDT on the 28th.

Event rainfall totals included 7.08 inches in North Wales, 6.99 inches in Plymouth Meeting, 6.92 inches in Kulpsville, 6.88 inches in Willow Grove and 6.87 inches in Hatfield.

Flood, Bucks

When: August 28, 9:00 AM EST to August 30, 1:19 AM EST
Where: Bucks County, 4.25 mi N of Riegelsville to 1.8 mi SW of Quakertown
Cause: Heavy Rain / Tropical System
Property damage: $700,000
Reported by: Emergency Manager
Coordinates: 40.661, -75.193

The Delaware River at Reigelsville had minor flooding and was above its 22 foot flood stage from 922 p.m. EDT on the 28th through 219 a.m. EDT on the 30th. It crested at 24.56 feet at 630 a.m. EDT on the 29th. Farther downstream, the Delaware River at Frenchtown (Hunterdon County) had minor flooding and was above its 16 foot flood stage from 249 a.m. EDT on the 29th through 1203 a.m. EDT on the 30th. It crested at 16.68 feet at 815 a.m. EDT on the 29th. Farther downstream, the Delaware River at Stockton (Hunterdon County) had minor flooding and was above its 18 foot flood stage from 417 a.m. EDT on the 29th through 1218 a.m. EDT on the 30th. It crested at 18.68 feet at 930 a.m. EDT on the 29th. The Delaware River at New Hope crested below flood stage. Farther downstream though, the Delaware River at Washington’s Crossing had minor flooding and was above its 16 foot flood stage from 945 a.m. EDT through 205 p.m. EDT on the 29th. It crested at 16.06 feet at 1100 a.m. EDT. Farther downstream, the Delaware River at Trenton (Mercer County) also had minor flooding and was above its 20 foot flood stage from 537 a.m. EDT on the 29th through 130 a.m. EDT on the 30th. It crested at 20.49 feet at 330 p.m. EDT on the 29th..

The Little Neshaminy Creek at Neshaminy had its third highest crest on record and its highest crest since June of 2001. The creek was above its 8 foot flood stage from 1107 p.m. EDT on the 27th through 1130 a.m. EDT on the 28th. It crested at 12.47 feet at 400 a.m. EDT on the 28th. The Neshaminy Creek at Langhorne had major flooding and the third highest crest on record and its highest crest since Hurricane Floyd in September of 1999. The creek was above its 9 foot flood stage from 1145 p.m. EDT on the 27th through 1151 p.m. EDT on the 28th. It crested at 19.56 feet at 1145 a.m. EDT on the 28th.

The Tohickon Creek at Pipersville was above its 10 foot flood stage from 207 a.m. EDT through 1215 p.m. EDT on the 28th. It crested at 10.42 feet at 315 a.m. EDT. The East Branch of the Perkiomen Creek at Dublin had major flooding with its second highest crest on record. The creek was above its 5 foot flood stage from 1206 a.m. EDT through 8 a.m. EDT on the 28th. It crested at 9.41 feet at 145 a.m. EDT.

Event rainfall totals included 7.73 inches in Springtown, 7.45 inches in Sellersville, 7.20 inches in Perkasie, 7.13 inches in Penndel and 6.57 inches in Newtown.

Flood, Berks

When: August 28, 9:00 AM EST to 3:19 PM EST
Where: Berks County, Hamburg to Bethel
Cause: Heavy Rain / Tropical System
Reported by: Emergency Manager
Coordinates: 40.550, -75.980

The Manatawny Creek at Spangsville had moderate flooding and its second highest crest on record. It was above its 6 foot flood stage from 408 a.m. EDT through 419 p.m. EDT on the 28th. It crested at 8.59 feet at 845 a.m. EDT.

Event rainfall totals included 4.94 inches in Oley, 4.91 inches in Mohnton, 4.33 inches in Fleetwood, 4.31 inches in Kutztown, 3.98 inches in Reading and 3.04 inches at the Reading Airport.

Flood, Lehigh

When: August 28, 11:00 AM EST to 10:33 PM EST
Where: Lehigh County, Hosensack to Center Vly
Cause: Heavy Rain / Tropical System
Property damage: $500,000
Reported by: Emergency Manager
Coordinates: 40.450, -75.500

The Little Lehigh Creek at Little Lehigh Park near Allentown had moderate flooding and was above its 6 foot flood stage from 409 a.m. EDT through 1133 p.m. EDT on the 28th. It crested at 9.68 feet at 9 a.m. EDT. Farther downstream, the Little Lehigh Creek at the 10th Street Bridge was above its 8 foot flood stage from 1245 p.m. EDT through 230 p.m. EDT on the 28th and again from 330 p.m. EDT through 640 p.m. EDT on the 28th. Its highest crest was 8.15 feet at 545 p.m. EDT. For both gages on the Little Lehigh Creek, it was the fifth highest crest on record and the highest crests since the remnants of Hurricane Ivan in September of 2004.

Event rainfall totals included 5.20 inches in West Allentown, 5.01 inches at the Lehigh Valley International Airport and 4.56 inches in Schnecksville.

Flood, Northampton

When: August 28, 11:00 AM EST to August 30, 12:10 AM EST
Where: Northampton County, Walnutport to Bethlehem
Cause: Heavy Rain / Tropical System
Property damage: $750,000
Reported by: Emergency Manager
Coordinates: 40.750, -75.580

The Delaware River at Easton-Phillipsburg had minor flooding and was above its 22 foot flood stage from 843 p.m. EDT on the 28th through 1210 a.m. EDT on the 30th. It crested at 25.15 feet at 5 a.m. EDT on the 29th. The Lehigh River at Glendon was above its 12 foot flood stage from 1030 a.m. EDT through 222 p/m/ EDT on the 28th. It crested at 19.20 feet at 1 p.m. EDT. The Monocacy Creek at Bethlehem had moderate flooding and was above its 4.5 foot flood stage from 202 a.m. EDT on the 28th through 245 a.m. EDT on the 29th. It crested at 6.54 feet at 1 p.m. EDT on the 28th.

|Event rainfall totals included 6.55 inches in Bethlehem, 5.72 inches in Martins Creek and 4.94 inches in Nazareth.

Flood, Carbon

When: August 28, 1:00 PM EST to 8:35 PM EST
Where: Carbon County, Albrightsville to Aquashicola
Cause: Heavy Rain / Tropical System
Deaths: 0 direct, 1 indirect
Reported by: Emergency Manager
Coordinates: 41.020, -75.620

On the morning of the 28th, a 39-year-old man skidded over an embankment and into a tree and died on the Northeast Extension of the Pennsylvania Turnpike. The Aquashicola Creek at Palmerton had moderate flooding and was above its 7 foot flood stage from 1052 a.m. EDT through 935 p.m. EDT on the 28th. It crested at 9.60 feet at 130 p.m. EDT.

Event rainfall totals included 4.46 inches in Palmerton, 3.55 inches in Bowmanstown, 3.32 inches in Jim Thorpe, 3.34 inches in Weatherly, and 2.81 inches in Lehighton.

Flood, Monroe

When: August 28, 1:00 PM EST to August 29, 6:42 PM EST
Where: Monroe County, 3.28 mi E of Shoemakers to 4.18 mi W of Canadensis
Cause: Heavy Rain / Tropical System
Property damage: $175,000
Reported by: Emergency Manager
Coordinates: 41.083, -74.967

The heavily traveled U.S. Route 209 was flooded and closed in Marshalls Creek.

The Delaware River at Tocks Island had moderate flooding and was above its 21 foot flood stage from 1018 p.m. EDT on the 28th through 742 p.m. EDT on the 29th. It crested at 23.21 feet at 1245 p.m. EDT on the 29th. The Lehigh River at Stoddartsville was 7 foot flood stage from 537 p.m. EDT through 740 p.m. EDT on the 28th. It crested at 7.05 feet at 630 p.m. EDT. | |The Brodhead Creek at Analomink was briefly above its 8 foot flood stage from 913 a.m. EDT through 922 a.m. EDT on the 28th. It crested at 8.01 feet at 915 a.m. EDT. Farther downstream, the Brodhead Creek at Minisink Hills was above its 10 foot flood stage twice from 843 a.m. EDT through 355 p.m. EDT on the 28th and from 818 a.m. EDT through 439 p.m. EDT on the 29th. The highest crest was 11.42 feet at 1115 a.m. EDT on the 28th. It was likely that the second flood was caused by the Delaware River being in flood which slowed the runoff from the creek. The Bush Kill at Shoemakers had moderate flooding and its fourth highest crest on record, highest since April of 2006. It was above its 6 foot flood stage from 721 a.m. EDT on the 28th through 515 a.m. EDT on the 29th. It crested at 7.35 feet at 1045 a.m. EDT on the 28th.

Event rainfall totals included 5.39 inches in Stroudsburg and 5.29 inches at the Pocono Mountain Airport.

The people who died

As the offices recorded each death: direct deaths were caused by the weather itself, indirect ones by something it set in motion.

Event	Date	Age	Sex	Where	Kind
Tropical Storm, Monroe	2011-08-28	44	Male	Outside/Open Areas	Direct
Flood, Montgomery	2011-08-28	65	Female	Vehicle/Towed Trailer	Direct
Flood, Carbon	2011-08-28	39	Male	Vehicle/Towed Trailer	Indirect

What these are

Tropical Storm: A tropical cyclone with sustained winds of 34 to 63 knots (39 to 73 mph).
Storm Surge/Tide: Water pushed ashore above the normal tide by a storm’s winds and low pressure.
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.
Flood: Flooding that develops more slowly than a flash flood: rivers leaving their banks, or water standing over land for an extended time.

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

The same day elsewhere

Every storm in Pennsylvania in 2011 Every state in 2011 This day in weather history Warnings in Pennsylvania, August 2011 The 2011 hurricane season

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: 343274, 343275, 343277, 343278, 343279, 343211, 343354, 343208, 343282, 343289, 343355, 343356, 343352, 343318, 343271, 343285, 343286, 343337, 343315, 343345, 343325, 343330, 343372, 343373, 343374, 343376, 343377, 343381, 343385, 343389, 343395, 343400.