Flash Flooding and Flooding in Pennsylvania, July 23 to 24, 2009

Name: Flash Flooding and Flooding in Pennsylvania, July 23 to 24, 2009
Start: 2009-07-23T16:22
End: 2009-07-24T07:30
Location: Pennsylvania

July 23 to 24, 2009 · NWS CTP · 13 events in 5 counties and zones

Slow moving thunderstorms along a nearly stationary cold front produced locally heavy rainfall in a short duration, resulting in flash flooding across portions of the Lower Susquehanna Valley. Rainfall amounts ranged from three to six inches in less than three hours with the highest amounts over eastern Cumberland, eastern Franklin and northern York Counties.

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: $385,000
Crop damage: None recorded
Events: 13

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.

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 Jul 23, 2:15 PM EST, 2 hours 7 minutes earlier.

Area forecast discussion, Jul 23, 2:15 PM EST, 2 hours 7 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE STATE COLLEGE PA
315 PM EDT THU JUL 23 2009

.SYNOPSIS...
A STUBBORN UPPER LEVEL TROUGH OVER THE GREAT LAKES WILL KEEP
SHOWERS AND THUNDERSTORMS IN THE FORECAST THROUGH THE WEEKEND.

&&

.NEAR TERM /THROUGH FRIDAY/...
A SLOW MOVING COLD FRONT WILL SLOW EVEN FURTHER AS IT CROSSES
CENTRAL PA TONIGHT...REACHING A HALT OVER THE SUSQUEHANNA RIVER
VALLY AROUND 12Z FRIDAY. AT THE SAME TIME...AN ANOMALOUSLY DEEP
SURFACE LOW WILL TRACK UP THE EASTERN SEABOARD TO SOUTHERN NEW
ENGLAND AND TAP 2+ PWATS AS IT DOES SO. SIGNIFICANTLY DECREASING
DEEP LAYER MOISTURE WILL FOLLOW AS THE STORM MOVES AWAY ON FRIDAY
WITH PWATS DECREASING BELOW ONE INCH OVER PORTIONS OF CENTRAL AND
WESTERN PA IN THE AFTERNOON.

FOR THE NEAR TERM...RICH DEEP LAYER MOISTURE WITH PWATS IN EXCESS
OF 1.5 AND DEFORMATION BETWEEN THE COASTAL AND ERN GLAKS LOW
CIRCULATIONS AS WELL AS THE ADVANCING DRY SLOT ALOFT WILL MAINTAIN
NUMEROUS SHOWERS AND ISOLATED THUNDERSTORMS. SHEAR IS LACKING FOR
SEVERE...BUT STORMS ARE CAPABLE OF PRODUCING LOCALLY HEAVY
RAINFALL. LOCAL 2 TO 3 INCH AMOUNTS OCCURRED EARLIER TODAY OVER
SOUTHERN YORK COUNTY. FORTUNATELY...BOUNDARY LAYER FLOW 20 TO 25
KTS IS KEEPING CELLS MOVING RIGHT ALONG THIS AFTERNOON WHICH IS A
DIMINISHING FACTOR FOR ANY THREAT OF FLOODING. WILL NEED TO WATCH
THE NORTHWEST AND FAR SOUTHEAST CLOSELY DUE TO RECENT HEAVY
RAINFALL.

18 HOUR RAINFALL THROUGH EARLY FRIDAY MORNING STILL AVERAGING
BETWEEN ONE QUARTER TO ONE HALF INCH. WILL WATCH CAREFULLY AS THE
FRONT SLOWS FURTHER THIS EVENING OVER THE LOWER SUSQ. AS THERE MAY
BE AN AREA OF TRAINING CELLS FROM THE RIGDE AND VALLEY REGION OF
CENTRAL PA SOUTHWARD THROUGH THE LOWER SUSQ.

UPPER LOW LIFTING NE ACROSS THE EASTERN GRT LKS ON FRIDAY. EARLY
LOW CLOUDS SHOULD MIX OUT TO PARTLY SUNNY SKIES...RESULTING IN
MODERATE INSTABILITY BY AFTN WITH ENS MEAN CAPES ARND 1200J/KG.
THUS...GIVEN COLD TEMPS ALOFT...CAN/T RULE OUT ISOLATED LARGE HAIL
WITH A FEW OF THE STORMS.

&&

.SHORT TERM /FRIDAY NIGHT THROUGH SATURDAY/...
FORECAST CHALLENGES FOR FRI NGT THRU SAT RESIDE WITH INTENSITY OF
OVERNIGHT FOG...AND AFT MAX T/S ACROSS PORTIONS OF THE SUSQ-RIVER
VALLEY.

ATTM 500MB HEIGHTS MARGINALLY INCREASE ON THE NORTHERN PERIPHERY OF
A WEAK RIDGE. ENSEMBLES HAVE A HIGH CONFIDENCE WITH STEADY LIFT
NORTH OF A MID-LVL VORT MAX INTO SOUTHERN ONTARIO...AS NEGATIVELY
TILTED TROUGH AXIS RETROGRADES AND FOCUSES TOWARDS MIDWEST REGION
FOR SAT. ANTICIPATE DEW PT/S REMAINING ELEVATED IN THE UPPER 50S/LOW
60S OVERNIGHT WITH A VERY MILD NGT. PATCHY FOG SHUD EASILY DEVELOP
FROM A MOIST BNDRY LYR...AND LINGER THRU SUNRISE.

PWAT VALUES REMAIN SEASONAL ARND 1.2 TO 1.5 INCHES SAT AFTN.
INSTABILITY REMAINS MARGINAL WITH NEAR SFC LAPSE RATES
STEEPENING...HOWEVER REMAINS DISCONNECTED TO MID-LVL LAPSE RATES
WHICH REMAIN MINIMAL. SHEAR REMAINS UNI-DIRECTIONAL...WITH A GRADUAL
INCREASE IN THE 1-3KM RANGE OF 15 TO 20 KTS FROM SW. PARCELS SHUD
EASILY BE SATURATED WITH MINIMAL LIFT...HOWEVER NOT MUCH VERTICAL
MOTION ANTICIPATED SO ATTM GOING WITH A PREDOMINANTLY DRY SAT AFTN.
CAN/T RULE OUT AN ISO SHRA/TSRA...SO HAVE A 20 POP REMAINING
SUPPORTED BY A COUPLE ENSEMBLE MEMBERS. 850MB THERMAL RIDGE PUSHES
17 TO 19 DEG C AIR INTO CENTRAL/SOUTHERN PORTIONS OF CWFA...COUPLED
WITH MINIMAL SOLAR FILTERING AND WE SHUD BE SEEING VERY WARM/MUGGY
CONDS. ANTICIPATE NEAR 90 DEGREES IN SOME OF THE VALLEYS ACROSS THE
LOWER SUSQ-VALLEY...TO LOW/MID 80S ACROSS CENTRAL/NW MTNS OF CWFA.

&&

.LONG TERM /SATURDAY NIGHT THROUGH THURSDAY/...
BIT OF UNCERTAINTY RIGHT AWAY IN THIS PERIOD ON SUNDAY...AS TIMING
OF FROPA HAS BEEN CHANGING WITH EACH MODEL RUN. HENCE KEPT POPS
MODERATELY HIGH THROUGHOUT THE DAY TO REPRESENT UNCERTAINTY. HOWEVER
IT APPEARS THE FROPA IS TRENDING LATER AND LATER INTO SUNDAY...AND
AT THIS POINT...HIGHEST CONFIDENCE SOLUTION SEEMS TO BRING IT
THROUGH AROUND 18Z. CHC FOR SOME HEAVY RAINFALL WITH THIS FRONT AS
WELL...WITH 12Z GEFS SHOWING A 90% CHC OF 24HR QPF OVER A HALF AN
INCH SUNDAY EVENING THROUGH MONDAY EVENING FOR NEARLY ALL OF THE
CWA.

12Z GEFS ALSO SUGGESTS COLD FRONT WILL BE SLOW TO CLEAR PA...HENCE
KEPT A CHC OF SHRA/TSRA IN THE FORECAST FOR MONDAY...ESP IN THE SE.
AFTER THIS...GFS TRENDS TOWARD THE 500MB TROUGH AXIS SHIFTING
FURTHER WEST...WITH MID ATLANTIC RIDE EDGING INTO THE AREA. WHILE
THE DAILY CHANCE OF SHOWERS AND THUNDERSTORMS WILL LIKELY REMAIN
NEXT WEEK...AS SHORT WAVES CONTINUE TO SPIN AROUND UPPER LOW
THROUGH PA...PERSISTED S/SE WILL BRING WARMER CONDITIONS...WITH
TEMPERATURES IN LOWER SUSQUEHANNA REACHING THE MID TO UPPER
EIGHTIES FOR MOST OF THE WEEK.

&&

.AVIATION /19Z THURSDAY THROUGH TUESDAY/...
NMRS SHOWERS AND SCT TSRA XPCD THIS EVENING ALONG AND AHEAD OF
COLD FRONT WHICH WILL STALL OVER THE LOWER SUSQUEHANNA RIVER VALLY
BY EARLY FRIDAY. MVFR CIGS WILL TREND DOWNWARD WITH FAIRLY
WIDESPREAD FOG FORMATION AFTER MIDNIGHT AND AREAS OF IFR. SHOWERS
AND ISOLATED THUNDERSTORMS WILL PERSIST ON FRIDAY AS AN UPPER
LEVEL TROF PASSES NE OF THE AREA.

OUTLOOK...
SAT...MAINLY VFR.
SUN...MVFR IN SHRA.
MON...MAINLY VFR.
TUE...MAINLY VFR...SCT MVFR IN AFTN SHRA.

&&

.CTP WATCHES/WARNINGS/ADVISORIES...
NONE.

&&

SYNOPSIS...FITZGERALD/STEINBUGL
NEAR TERM...DEVOIR
SHORT TERM...BEACHLER
LONG TERM...BEACHLER/DICKEY
AVIATION...DEVOIR/STEINBUGL

Hazardous weather outlook, Jul 23, 4:02 AM EST, 12 hours 20 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE STATE COLLEGE PA
502 AM EDT THU JUL 23 2009

PAZ004>006-010>012-017>019-024>028-033>037-041-042-045-046-049>053-
056>059-063>066-240915-
WARREN-MCKEAN-POTTER-ELK-CAMERON-NORTHERN CLINTON-CLEARFIELD-
NORTHERN CENTRE-SOUTHERN CENTRE-CAMBRIA-BLAIR-HUNTINGDON-MIFFLIN-
JUNIATA-SOMERSET-BEDFORD-FULTON-FRANKLIN-TIOGA-NORTHERN LYCOMING-
SULLIVAN-SOUTHERN CLINTON-SOUTHERN LYCOMING-UNION-SNYDER-MONTOUR-
NORTHUMBERLAND-COLUMBIA-PERRY-DAUPHIN-SCHUYLKILL-LEBANON-CUMBERLAND-
ADAMS-YORK-LANCASTER-
502 AM EDT THU JUL 23 2009

THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL PENNSYLVANIA.

.DAY ONE...TODAY 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.

In the hours before

Special weather statement, Jul 23, 3:56 PM EST, 26 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE STATE COLLEGE PA
456 PM EDT THU JUL 23 2009

PAZ012-041-045-046-232200-
NORTHERN CLINTON PA-NORTHERN LYCOMING PA-SOUTHERN CLINTON PA-
SOUTHERN LYCOMING PA-
456 PM EDT THU JUL 23 2009

...A STRONG THUNDERSTORM WILL AFFECT EASTERN CLINTON AND WEST CENTRAL
LYCOMING COUNTIES...

AT 455 PM EDT...A STRONG THUNDERSTORM WAS LOCATED 7 MILES WEST OF
LOCK HAVEN...MOVING NORTHEAST AT 15 MPH.

WIND GUSTS TO 40 MPH ARE POSSIBLE WITH THIS STORM. VERY HEAVY RAIN
WILL FALL FROM THIS STORM...AND WILL CAUSE WATER TO POND ON ROADS AND
FILL POOR DRAINAGE AREAS. THE RAIN WILL CAUSE RAPID RISES ON SMALL
STREAMS AND CREEKS.

THIS STORM WILL BE NEAR MILL HALL AROUND 505 PM...LOCK HAVEN AROUND
515 PM...GLEN UNION AROUND 520 PM...DUNNSTOWN AROUND 525 PM...
MCELHATTAN AROUND 535 PM AND AVIS AROUND 545 PM.

THIS WILL IMPACT I-80 BETWEEN MILE MARKERS 171 AND 172.

THIS WILL ALSO IMPACT THE FOLLOWING MAJOR ROADS...ROUTE 220...STATE
ROAD 120.

LAT...LON 4147 7738 4128 7712 4101 7756 4104 7759
      4106 7756 4106 7759 4111 7768 4111 7773
      4112 7775

EXPERIMENTAL

FORECASTER: BEACHLER

Special weather statement, Jul 23, 4:12 PM EST, 10 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE STATE COLLEGE PA
512 PM EDT THU JUL 23 2009

PAZ056-057-063-232215-
CUMBERLAND PA-DAUPHIN PA-PERRY PA-
512 PM EDT THU JUL 23 2009

...A STRONG THUNDERSTORM WILL AFFECT CENTRAL DAUPHIN...EAST CENTRAL
PERRY AND NORTHEASTERN CUMBERLAND COUNTIES...

AT 511 PM EDT...A STRONG THUNDERSTORM WAS LOCATED OVER
MECHANICSBURG...MOVING NORTHEAST AT 15 MPH.

WIND GUSTS TO 40 MPH ARE POSSIBLE WITH THIS STORM. VERY HEAVY RAIN
WILL FALL FROM THIS STORM...AND WILL CAUSE WATER TO POND ON ROADS AND
FILL POOR DRAINAGE AREAS. THE RAIN WILL CAUSE RAPID RISES ON SMALL
STREAMS AND CREEKS.

THIS STORM WILL BE NEAR WERTZVILLE...AND SHIREMANSTOWN AROUND 525
PM...CAMP HILL AROUND 530 PM...AND NEW CUMBERLAND AROUND 535
PM...ENOLA...WEST FAIRVIEW AND WORMLEYSBURG AROUND 540 PM.

THIS WILL IMPACT THE FOLLOWING CENTRAL PENNSYLVANIA INTERSTATES...THE
PENNSYLVANIA TURNPIKE BETWEEN MILE MARKERS 224 AND 239...I-81 BETWEEN
MILE MARKERS 48 AND 81...I-83 BETWEEN MILE MARKERS 40 AND 50.

THIS WILL ALSO IMPACT THE FOLLOWING MAJOR ROADS...THE HARRISBURG
EXPRESSWAY...ROUTE 11...ROUTE 11/15...ROUTE 15...ROUTE 22...ROUTE
209...ROUTE 322/22.

LAT...LON 4021 7721 4057 7688 4044 7667 4038 7665
      4021 7687 4022 7690 4020 7692 4019 7691
      4016 7693 4017 7697 4015 7698 4016 7701
      4012 7707

EXPERIMENTAL

FORECASTER: MARTIN

The radar

The Sterling radar (KLWX), 96 km away, was scanning. The volume nearest the first event began at 21:22 UTC.

Open the radar archive at this moment

Event by event

7 flash flood, 6 flood. Local standard time, as filed.

Flash Flood, Franklin

When: July 23, 4:22 PM EST to 7:00 PM EST
Where: Franklin County, 1.7 mi SW of Grindstone Hill to 0.5 mi E of East Fayetteville
Cause: Heavy Rain
Property damage: $50,000
Reported by: Trained Spotter
Coordinates: 39.831, -77.650

Heavy rain produced flash flooding just south of Chambersburg along Interstate 81 between mile markers 10 and 13. The northbound lane at the Lighthouse Road overpass was covered by four inches of water. Eight residents were displaced due to flooding in Chambersburg Borough along Falling Spring Road. A partial foundation collapse occurred to a home on Country Road in Guilford Township. Nearly five inches of rainfall was reported in Scotland between 330 and 600 pm EDT.

Flash Flood, Cumberland

When: July 23, 4:30 PM EST to 7:00 PM EST
Where: Cumberland County, 1.49 mi SE of Gettysburg Jct to 2.07 mi SW of Carlisle Spgs
Cause: Heavy Rain
Property damage: $100,000
Reported by: Trained Spotter
Coordinates: 40.205, -77.149

Heavy rain caused flash flooding just north of Carlisle in North Middletown Township. Three to five feet of water inundated several homes along Echo Road. Water was over the top of resident mailboxes in some areas. Several municipal roads were also closed due to the flooding.

Flash Flood, Cumberland

When: July 23, 4:45 PM EST to 7:00 PM EST
Where: Cumberland County, 2.93 mi NE of Newburg to 0.68 mi SW of West Hill
Cause: Heavy Rain
Reported by: Trained Spotter
Coordinates: 40.157, -77.507

Heavy rain produced flash flooding along the Pennsylvania Turnpike near Newville.

Flash Flood, Cumberland

When: July 23, 5:25 PM EST to 7:00 PM EST
Where: Cumberland County, 1.55 mi SSW of Mechanicsburg to 0.49 mi SW of Grantham
Cause: Heavy Rain
Property damage: $100,000
Reported by: Trained Spotter
Coordinates: 40.201, -77.016

Heavy rain produced flash flooding just southeast of Mechanicsburg in Upper Allen Township. Several residents were evacuated from flooded homes.

Flash Flood, York

When: July 23, 5:45 PM EST to 7:00 PM EST
Where: York County, 1.22 mi NE of Yocumtown to 0.41 mi WNW of Franklintown
Cause: Heavy Rain
Property damage: $50,000
Reported by: Emergency Manager
Coordinates: 40.184, -76.786

Heavy rain produced significant flash flooding across northern York County. Flooding closed numerous roads in Carrol Township. A water rescue was performed at the intersection of the Gettysburg Pike and Chestnut Street on the Rosegarden underpass, where two vehicles with 4-5 occupants were stranded. Junction Road bridge over the Dogwood Creek was jammed with debris, causing water to spill over the bridge and damage the road/bridge structure. West Siddonsburg Road between Route 15 and Orebank Road was closed due to flooding. A rock slide occurred on Mt. Airy and Ridge Road in Monaghan Township. Significant damage was reported on Guilbert Road between West Siddonsburg Road and Stony Run Road along the Cumberland County line. Route 74 was closed between Campground Road and Williams Grove Road. Fairview and Monaghan Townships each issued disaster declarations for the aftermath of the flooding.

Flash Flood, Clinton

When: July 23, 6:15 PM EST to 8:26 PM EST
Where: Clinton County, 4.15 mi N of Swissdale to 1.63 mi NE of Beech Creek
Cause: Heavy Rain
Property damage: $40,000
Reported by: Emergency Manager
Coordinates: 41.240, -77.450

Heavy rain produced flash flooding throughout south-central Clinton County. Numerous small streams were flooded causing road and bridge closures in Woolrich, McElhatten and Avis. Flash flooding caused a washout along Coudersport Pike/Route 664 and Middle Hill Road in Woodward Township. Lusk Run, Fairport Road and Orner Road were flooded in Bald Eagle Township. Flooding was also reported on Spong Hollow Road in Dunnstable Township and on Little Plum Road, Gravel Hill Road, Owl Hollow Road, Park Avenue, Sulfur Run Road and Steward Road in Pine Creek Township. Chatham Run was out of its banks at Gravel Hill Road.

Flash Flood, Lycoming

When: July 23, 6:20 PM EST to 8:26 PM EST
Where: Lycoming County, 1.26 mi NW of Jersey Shr to 1.47 mi WSW of Larryville
Cause: Heavy Rain
Property damage: $25,000
Reported by: Emergency Manager
Coordinates: 41.210, -77.290

Heavy rain produced flash flooding across southwest Lycoming County. The flooding washed out a portion of Route 44 in Watson Township. A rock slide occurred on Route 973 in Watson and Mifflin Townships. The Salladasburg Borough also reported flooding.

Flood, York

When: July 23, 7:00 PM EST to July 24, 12:45 AM EST
Where: York County, 1.22 mi NE of Yocumtown to 0.41 mi WNW of Franklintown
Cause: Heavy Rain
Reported by: Emergency Manager
Coordinates: 40.182, -76.784

Heavy rain produced significant flash flooding across northern York County. Flooding closed numerous roads in Carrol Township. Junction Road bridge over the Dogwood Creek was jammed with debris, causing water to spill over the bridge and damage the road/bridge structure. West Siddonsburg Road between Route 15 and Orebank Road was closed due to flooding. A rock slide occurred on Mt. Airy and Ridge Road in Monaghan Township. Significant damage was reported on Guilbert Road between West Siddonsburg Road and Stony Run Road along the Cumberland County line. Route 74 was closed between Campground Road and Williams Grove Road. Fairview and Monaghan Townships each issued disaster declarations for the aftermath of the flooding.

The flash flooding persisted into the overnight hours on the 24th and transitioned into areal county flooding.

Flood, Cumberland

When: July 23, 7:00 PM EST to 9:45 PM EST
Where: Cumberland County, 1.55 mi SSW of Mechanicsburg to 0.49 mi SW of Grantham
Cause: Heavy Rain
Reported by: Emergency Manager
Coordinates: 40.199, -77.011

Heavy rain produced flash flooding just southeast of Mechanicsburg in Upper Allen Township. Several residents were evacuated from flooded homes.

The flash flooding persisted late into the evening on the 23rd and transitioned into areal county flooding.

Flood, Clinton

When: July 23, 8:26 PM EST to 10:15 PM EST
Where: Clinton County, 4.15 mi N of Swissdale to 1.63 mi NE of Beech Creek
Cause: Heavy Rain
Reported by: Emergency Manager
Coordinates: 41.240, -77.450

The flash flooding persisted into the late evening on the 23rd and transitioned into areal county flooding.

Flood, Lycoming

When: July 23, 8:26 PM EST to 10:15 PM EST
Where: Lycoming County, 1.26 mi NW of Jersey Shr to 1.47 mi WSW of Larryville
Cause: Heavy Rain
Reported by: Emergency Manager
Coordinates: 41.213, -77.287

The flash flooding persisted into the late evening on the 23rd and transitioned into areal county flooding.

Flood, Cumberland

When: July 24, 4:00 AM EST to 7:30 AM EST
Where: Cumberland County, 0.43 mi SW of Eberleys Mill to 0.33 mi S of Eberleys Mill
Cause: Heavy Rain
Property damage: $10,000
Reported by: River/Stream Gage
Coordinates: 40.225, -76.905

Heavy rain caused Yellow Breeches Creek at Camp Hill to exceed flood stage. Moderate flooding was reported along Creekwood Drive in the Allendale section of Camp Hill, where reports of several flooded vehicles were received. Also, Cedar Cliff Drive was inundated by flood waters from the Creek.

Flood, York

When: July 24, 4:00 AM EST to 7:30 AM EST
Where: York County, 1.88 mi W of New Market to 1.12 mi WSW of New Market
Cause: Heavy Rain
Property damage: $10,000
Reported by: River/Stream Gage
Coordinates: 40.225, -76.905

Heavy rain caused Yellow Breeches Creek at Camp Hill to exceed flood stage. A number of homes in the Green Lane Farms development were affected by flood waters.

What these are

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 2009 Every state in 2009 This day in weather history Warnings in Pennsylvania, July 2009

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: 177221, 177179, 177231, 177165, 177306, 177252, 177299, 177321, 177322, 177323, 177324, 177360, 177361.