Flood in Maryland, April 28 to 30, 2011

Name: Flood in Maryland, April 28 to 30, 2011
Start: 2011-04-28T18:15
End: 2011-04-30T18:00
Location: Maryland

April 28 to 30, 2011 · NWS PHI · 1 event in 1 county or zone

The runoff from the heavy rain that fell in the Susquehanna Basin on April 27th and 28th in New York and Pennsylvania produced moderate flooding along the Susquehanna River in Cecil County.

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: None recorded
Crop damage: None recorded
Events: 1

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.

The runoff from the heavy rain that fell in the Susquehanna Basin on April 27th and 28th in New York and Pennsylvania produced moderate flooding along the Susquehanna River in Cecil 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 Philadelphia/Mount Holly wrote its last area forecast discussion before the first event at Apr 28, 3:37 PM EST, 2 hours 38 minutes earlier.

Area forecast discussion, Apr 28, 3:37 PM EST, 2 hours 38 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
437 PM EDT THU APR 28 2011

.SYNOPSIS...
THE COLD FRONT WHICH BROUGHT SHOWERS AND THUNDERSTORMS TO MANY ARES
OF THE MIDDLE ATLANTIC TODAY WILL CONTINUE MOVING EASTWARD TONIGHT.
HIGH PRESSURE WILL BUILD ACROSS THE AREA FRIDAY THROUGH SUNDAY WITH
MOSTLY FINE WEATHER EXPECTED. AN UPPER AIR DISTURBANCE MAY CREATE A
FEW SCATTERED SHOWERS ACROSS THE SOUTHERN POCONOS OR LEHIGH VALLEY
FRIDAY AFTERNOON. ANOTHER WEATHER SYSTEM AND ITS ASSOCIATED FRONT
WILL MOVE INTO OUR AREA EARLY NEXT WEEK.

&&

.NEAR TERM /UNTIL 6 AM FRIDAY MORNING/...
SHORT TERM UPDATE TO ADJUST TEMPS. POPS ADJUSTMENT/TIGHTENING
GRADIENT BASED ON LATEST HRRR AND CURRENT RADAR IMAGERY, IN LINE
WITH ONGOING THINKING.

THE COLD FRONT PRESENTLY LOCATED ACROSS THE WRN COUNTIES WILL
CONTINUE EASTWARD TONIGHT. SCATTERED SHOWERS WILL DIMINISH
RAPIDLY FROM THE CENTRAL AND EASTERN AREAS THIS EVENING. CLOUD
COVER WILL DECREASE QUICKLY AS WELL WITH MOST AREAS HAVING PARTLY
CLOUDY SKIES BY MIDNIGHT. IT WILL BECOME COOLER AND DRIER AS THE
NIGHT GOES ON WITH TEMPERATURES DROPPING INTO THE MID OR UPPER 40S
NORTH AND MOSTLY NEAR 50 ACROSS THE DELMARVA AND METRO
PHILADELPHIA AREAS. WINDS WILL BECOME WEST AND REMAIN BETWEEN 5
AND 10 MPH MOST OF THE NIGHT.

&&

.SHORT TERM /6 AM FRIDAY MORNING THROUGH SUNDAY/...
FAIR WEATHER IS EXPECTED FOR MUCH OF THE SHORT TERM PART OF THE
FORECAST. A HIGH PRESSURE SYSTEM FROM THE SOUTHERN PART OF THE
COUNTRY WILL BUILD NORTH AND EAST TOWARD THE EAST COAST DURING THE
WEEKEND. AN UPPER AIR TROUGH WILL SWING ACROSS THE REGION FRIDAY.
THIS FEATURE WILL BRING SOME EXTRA CLOUDINESS DURING THE AFTERNOON
AND PERHAPS A FEW SCATTERED SHOWERS...BUT THE TOTALS WILL BE LIGHT
AND THE CHC FOR SHOWERS FAIRLY LOW. THERE IS ALSO A SLGT CHC FOR
SHOWERS SUN AFTERNOON...AS A FRONT ASSOCIATED WITH THE NEXT SYSTEM
BEGINS TO NEAR THE AREA.

TEMPERATURES FRI AND SAT WILL BE COOLER THAN THE PAST FEW DAYS WITH
MOSTLY MID TO UPPER 60S EXPECTED FOR HIGHS...IT WILL BE DRIER
HOWEVER AND MORE COMFORTABLE THAN THE PAST FEW DAYS. ON SUNDAY...IT
WILL BE A FEW DEGREES WARMER WITH HIGH TEMPERATURES IN THE LOW 70S.

&&

.LONG TERM /SUNDAY NIGHT THROUGH THURSDAY/...
MORE SEASONAL WEATHER IS EXPECTED IN THE LONG TERM WITH A COUPLE OF
PRECIPITATION SHOTS POSSIBLE. AT THIS JUNCTURE NEITHER SYSTEM LOOKS
AS STRONG AS THE ONE THAT HAS JUST AFFECTED US.

A WARM FRONT AND THEN COLD FRONT FROM A GREAT LAKES SYSTEM IS
EXPECTED TO MOVE THROUGH OUR CWA AROUND MONDAY. THIS ONE IS PROGGED
TO BE WEAKER AND FORECAST INSTABILITY AT THE SURFACE AND ALOFT IS
NOT THERE YET FOR TSRAS TO OCCUR. QPF IS NOT COPIOUS EITHER. THERE
IS PRETTY GOOD MODEL EVOLUTION WITH THIS SYSTEM, WITH THE USUAL
TIMING DIFFERENCES (GFS FASTER) WHICH MADE US CAP ANY FORECAST
PERIOD'S POPS TO CHANCE FOR NOW.

IT GETS A BIT MUDDLED AFTER THAT AS THE FRONT IS FORECAST TO STALL
OFFSHORE AND WAIT FOR A DEEPENING TROF TO MOVE THROUGH THE EASTERN
CONUS. SO THERE IS UNCERTAINTY AS TO HOW FAR THE FRONT CAN MAKE IT
OFFSHORE AND THE DEGREE OF SECONDARY OR TERTIARY DEVELOPMENT. WITH
THE MODEL SOLUTION SPREAD THIS HAS FORCED OUR HAND INTO CONTINUING
SLGT CHC AND CHC POPS FROM TUESDAY INTO THURSDAY. HOPEFULLY WE CAN
TIME THE POTENTIAL EVENTS BETTER IN THE DAYS AHEAD.

THE GFS IS THE STRONGEST OF THE MEDIUM RANGE MODELS AT THIS POINT
WHICH LOOKS ANOMALOUS AT THIS POINT BASED ON THE POSITIONING AND THE
STRENGTH OF THE CLOSED LOW. THE LATEST ECMWF IS SLIGHTLY SLOWER AND
DEEPER, BUT THE UKMET WHICH NORMALLY LIKES VIGOROUS CLOSED SYSTEMS
REMAINS FAIRLY PROGRESSIVE THRU THE END OF ITS DETERMINISTIC
FORECAST PERIOD. BECAUSE OF THE LATTER TWO, WE HAVE KEPT A SLIGHTLY
MORE PROGRESSIVE SOLUTION THAN THE GFS WHICH KEEPS OUR CWA CLOSE TO
THE WESTERN EDGE OF PRECIPITATION CHANCES IN THE LATTER HALF OF THE
LONG TERM.

TEMPERATURES SHOULD AVERAGE AT OR SLIGHTLY BELOW NORMAL THRUT THE
LONG TERM. MONDAY'S MAX TEMPS ARE TRICKY, LOW CONFIDENCE, BECAUSE OF
THE NEED FOR THE WARM FRONT TO CLEAR OUR CWA. BEYOND THAT THE MORE
VIGOROUS 12Z GFS SOLUTION HAS LED TO LOWER MAX AND MIN TEMPS
OVERALL. GOING WITH THE MORE PROGRESSIVE AND LESS DEEP SOLUTION WE
HAVE ADDED A FEW DEGREES OVERALL TO THE 12Z MEX MOS GUIDANCE.

&&

.AVIATION /21Z THURSDAY THROUGH TUESDAY/...
REST OF TODAY...VFR SCT TO BKN AOA 4000 FT.

MOST OF THE SHOWERS AND STORMS HAVE ENDED ALTHOUGH THERE IS STILL A
SMALL CHC OF A MODERATE SHOWER OR ISO TSTM VCNTY KACY AND KMIV TIL
ABOUT 22Z.

TONIGHT...VFR MOSTLY CLEAR. SMALL CHC OF PATCHY FOG/STRATUS IN THE
COUNTRYSIDE. THIS MIGHT OCCUR AT KMIV.

OUTLOOK...
FRIDAY...VFR. CIGS NEAR 5000 FT SHOULD DEVELOP MIDDAY AND BUILD INTO A
VFR SHOWER OR SPRINKLE LATE DAY...ESPECIALLY KABE/KTTN/KRDG. W WINDS
G20-25 KTS AT TIMES MIDDAY/AFTN. VFR CIGS CLEAR AT NIGHT WITH LIGHT
WIND.

SATURDAY AND SUNDAY...VFR. WINDS UNDER 20 KTS.

MONDAY...VFR CIGS MAY BRIEFLY DEGRADE TO MVFR CONDS IN A SHOWER
ASSTD WITH A CFP.

&&

.MARINE...
THROUGH FRIDAY...SCA ATLC WATERS AND NO ADVY FOR DEL BAY.

SCA PRIMARILY FOR LARGE SEAS IN THE ATLC WATERS. ALSO COVERS
LEFTOVER GUSTS AS OF THIS WRITING AT 325 PM...AND ON FRIDAY...
POSSIBLE W GUST 25KTS NEARSHORE.

THIS WEEKEND: NO HEADLINE FORESEEN ATTM.

NEXT MONDAY...POSSIBLE SCA HEADLINE WITH THE CFP BUT AGAIN NOT A
HIGH PROB ATTM.

&&

.PHI WATCHES/WARNINGS/ADVISORIES...
PA...NONE.
NJ...NONE.
DE...NONE.
MD...NONE.
MARINE...SMALL CRAFT ADVISORY UNTIL 4 PM EDT FRIDAY FOR ANZ450>455.

&&

SYNOPSIS...O'HARA
NEAR TERM...GIGI/O'HARA
SHORT TERM...O'HARA
LONG TERM...GIGI
AVIATION...DRAG
MARINE...DRAG

Hazardous weather outlook, Apr 28, 2:25 PM EST, 3 hours 50 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
325 PM EDT THU APR 28 2011

DEZ001>004-MDZ008-012-015-019-020-NJZ001-007>010-012>027-PAZ054-055-
060>062-067>071-291930-
NEW CASTLE-KENT-INLAND SUSSEX-DELAWARE BEACHES-CECIL-KENT MD-
QUEEN ANNES-TALBOT-CAROLINE-SUSSEX-WARREN-MORRIS-HUNTERDON-SOMERSET-
MIDDLESEX-WESTERN MONMOUTH-EASTERN MONMOUTH-MERCER-SALEM-GLOUCESTER-
CAMDEN-NORTHWESTERN BURLINGTON-OCEAN-CUMBERLAND-ATLANTIC-CAPE MAY-
ATLANTIC COASTAL CAPE MAY-COASTAL ATLANTIC-COASTAL OCEAN-
SOUTHEASTERN BURLINGTON-CARBON-MONROE-BERKS-LEHIGH-NORTHAMPTON-
CHESTER-MONTGOMERY-BUCKS-DELAWARE-PHILADELPHIA-
325 PM EDT THU APR 28 2011

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

.DAY ONE...THIS AFTERNOON AND TONIGHT.

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.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.

ANZ450>455-291930-
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-
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-
325 PM EDT THU APR 28 2011

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 4 PM EDT FRIDAY...

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.

   SMALL CRAFT ADVISORY.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY.

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

   SMALL CRAFT ADVISORY.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.

ANZ430-431-291930-
DELAWARE BAY WATERS NORTH OF EAST POINT NJ TO SLAUGHTER BEACH DE-
DELAWARE BAY WATERS SOUTH OF EAST POINT NJ TO SLAUGHTER BEACH DE-
325 PM EDT THU APR 28 2011

THIS HAZARDOUS WEATHER OUTLOOK IS FOR DELAWARE BAY WATERS.

.DAY ONE...THIS AFTERNOON AND TONIGHT.

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.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.

In the hours before

Local storm report, Apr 28, 1:07 PM EST, 5 hours 8 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
207 PM EDT THU APR 28 2011

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

1106 AM     TSTM WND DMG     FLYING HILLS            40.28N  75.91W
04/28/2011                   BERKS              PA   911 CALL CENTER

            TREES AND WIRES DOWN IN CUMRU TWP

&&

EVENT NUMBER PHI1100114

HEAVENER

Local storm report, Apr 28, 1:15 PM EST, 5 hours before

PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
215 PM EDT THU APR 28 2011

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

0908 AM     TSTM WND DMG     SOUTH HEIDELBERG TWP    40.31N  76.09W
04/28/2011                   BERKS              PA   EMERGENCY MNGR

            TREE DOWN ON SCHOOL BUS ON SOUTH GALEN HILL DRIVE NEAR
            GALEN HALL.

1005 AM     TSTM WND DMG     MERTZTOWN               40.51N  75.67W
04/28/2011                   BERKS              PA   PUBLIC

            LARGE TREE LIMBS DOWN

1015 AM     TSTM WND DMG     JACKSON TWP             41.01N  75.38W
04/28/2011                   MONROE             PA   911 CALL CENTER

            TREES ON HOUSES

1015 AM     TSTM WND DMG     STROUD TWP              40.96N  75.21W
04/28/2011                   MONROE             PA   911 CALL CENTER

            TREES DOWN

1015 AM     TSTM WND DMG     STROUD TWP              40.96N  75.21W
04/28/2011                   MONROE             PA   911 CALL CENTER

            SCATTERED TREES AND WIRES DOWN COUNTY WIDE.

1106 AM     TSTM WND DMG     FLYING HILLS            40.28N  75.91W
04/28/2011                   BERKS              PA   911 CALL CENTER

            TREES AND WIRES DOWN IN CUMRU TWP

1130 AM     FUNNEL CLOUD     CHESTER                 40.79N  74.69W
04/28/2011                   MORRIS             NJ   PUBLIC

            FUNNEL CLOUD SPOTTED IN CHESTER.

1150 AM     HAIL             WHITEHOUSE STATION      40.62N  74.77W
04/28/2011  M0.25 INCH       HUNTERDON          NJ   TRAINED SPOTTER

1200 PM     NON-TSTM WND GST SHIP JOHN SHOAL NOS     39.30N  75.38W
04/28/2011  M58 MPH          ANZ430             NJ   SHIP

&&

EVENT NUMBER PHI1100109 PHI1100111 PHI1100115 PHI1100116 PHI1100117
PHI1100114 PHI1100118 PHI1100119 PHI1100113

HEAVENER

Special weather statement, Apr 28, 1:55 PM EST, 4 hours 20 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
255 PM EDT THU APR 28 2011

NJZ013-014-020-026-282000-
COASTAL OCEAN NJ-EASTERN MONMOUTH NJ-OCEAN NJ-WESTERN MONMOUTH NJ-
255 PM EDT THU APR 28 2011

...A STRONG THUNDERSTORM WILL AFFECT EASTERN MONMOUTH AND OCEAN
COUNTIES...

AT 252 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM 17 MILES SOUTH OF SANDY HOOK...MOVING NORTHEAST
AT 50 MPH. THE THUNDERSTORM WILL BE NEAR DEAL AND LOCH ARBOUR AROUND
300 PM.

WIND GUSTS TO 40 MPH ARE POSSIBLE WITH THIS STORM.

LAT...LON 4027 7397 4014 7402 4005 7402 4003 7404
      3999 7404 3997 7408 3998 7409 4024 7419
      4040 7396 4032 7396

NIERENBERG

Local storm report, Apr 28, 2:22 PM EST, 3 hours 53 minutes before

PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
322 PM EDT THU APR 28 2011

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

0908 AM     TSTM WND DMG     SOUTH HEIDELBERG TWP    40.31N  76.09W
04/28/2011                   BERKS              PA   EMERGENCY MNGR

            TREE DOWN ON SCHOOL BUS ON SOUTH GALEN HILL DRIVE NEAR
            GALEN HALL.

1005 AM     TSTM WND DMG     MERTZTOWN               40.51N  75.67W
04/28/2011                   BERKS              PA   PUBLIC

            LARGE TREE LIMBS DOWN

1015 AM     TSTM WND DMG     JACKSON TWP             41.01N  75.38W
04/28/2011                   MONROE             PA   911 CALL CENTER

            TREES ON HOUSES

1015 AM     TSTM WND DMG     STROUD TWP              40.96N  75.21W
04/28/2011                   MONROE             PA   911 CALL CENTER

            TREES DOWN

1015 AM     TSTM WND DMG     STROUD TWP              40.96N  75.21W
04/28/2011                   MONROE             PA   911 CALL CENTER

            SCATTERED TREES AND WIRES DOWN COUNTY WIDE.

1050 AM     TSTM WND DMG     SPRINGFIELD TWP         40.51N  75.31W
04/28/2011                   BUCKS              PA   911 CALL CENTER

            WIRES DOWN IN SPRINGFIELD TOWNSHIP.

1054 AM     NON-TSTM WND GST GEORGETOWN              38.69N  75.39W
04/28/2011  M51 MPH          SUSSEX             DE   ASOS

1054 AM     NON-TSTM WND GST DOVER                   39.16N  75.52W
04/28/2011  M52 MPH          KENT               DE   ASOS

1100 AM     FUNNEL CLOUD     ALEXANDRIA TWP          40.59N  75.03W
04/28/2011                   HUNTERDON          NJ   911 CALL CENTER

            A FUNNEL CLOUD SPOTTED IN ALEXANDRIA TOWNSHIP.

1106 AM     TSTM WND DMG     FLYING HILLS            40.28N  75.91W
04/28/2011                   BERKS              PA   911 CALL CENTER

            TREES AND WIRES DOWN IN CUMRU TWP

1110 AM     TSTM WND DMG     ALEXANDRIA TWP          40.59N  75.03W
04/28/2011                   HUNTERDON          NJ   911 CALL CENTER

            TREES AND POWER LINES DOWN.

1130 AM     FUNNEL CLOUD     CHESTER                 40.79N  74.69W
04/28/2011                   MORRIS             NJ   PUBLIC

            FUNNEL CLOUD SPOTTED IN CHESTER.

1150 AM     HAIL             WHITEHOUSE STATION      40.62N  74.77W
04/28/2011  M0.25 INCH       HUNTERDON          NJ   TRAINED SPOTTER

1200 PM     NON-TSTM WND GST SHIP JOHN SHOAL NOS     39.30N  75.38W
04/28/2011  M58 MPH          ANZ430             NJ   SHIP

1205 PM     TSTM WND DMG     DENVILLE                40.89N  74.48W
04/28/2011                   MORRIS             NJ   911 CALL CENTER

            A TREE BLOWN DOWN ONTO POWER LINES IN DENVILLE.

1250 PM     TSTM WND DMG     NORTH PLAINFIELD        40.62N  74.44W
04/28/2011                   SOMERSET           NJ   911 CALL CENTER

            TREE LIMBS AND WIRES DOWN.

&&

EVENT NUMBER PHI1100109 PHI1100111 PHI1100115 PHI1100116 PHI1100117
PHI1100120 PHI1100125 PHI1100126 PHI1100122 PHI1100114 PHI1100121
PHI1100118 PHI1100119 PHI1100113 PHI1100123 PHI1100124

HEAVENER

Special weather statement, Apr 28, 4:04 PM EST, 2 hours 11 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
504 PM EDT THU APR 28 2011

DEZ002>004-MDZ015-019-020-NJZ021>025-282200-
ATLANTIC NJ-ATLANTIC COASTAL CAPE MAY NJ-CAPE MAY NJ-CAROLINE MD-
COASTAL ATLANTIC NJ-CUMBERLAND NJ-DELAWARE BEACHES DE-
INLAND SUSSEX DE-KENT DE-QUEEN ANNE'S MD-TALBOT MD-
504 PM EDT THU APR 28 2011

...STRONG THUNDERSTORMS WILL AFFECT ATLANTIC...CAPE
MAY...CAROLINE...CUMBERLAND...KENT...QUEEN ANNE'S...SUSSEX AND TALBOT
COUNTIES...

AT 501 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM 18 MILES NORTHWEST OF GEORGETOWN...MOVING EAST AT
50 MPH. THE THUNDERSTORM WILL BE NEAR MILFORD...BIG STONE BEACH
AROUND 515 PM...FORTESQUE...CAPE HENLOPEN STATE PARK AROUND 530 PM...
GOSHEN...CAPE MAY COURT HOUSE AROUND 545 PM...SEA ISLE CITY AND
AVALON AROUND 600 PM.

WIND GUSTS TO 40 MPH ARE POSSIBLE WITH THESE STORMS.

LAT...LON 3846 7570 3865 7572 3869 7583 3867 7595
      3856 7604 3873 7625 3867 7636 3877 7640
      3887 7625 3882 7621 3883 7620 3894 7624
      3884 7638 3885 7639 3892 7637 3947 7450
      3899 7479 3881 7508 3844 7505

FORECASTER:

Special weather statement, Apr 28, 5:22 PM EST, 53 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
622 PM EDT THU APR 28 2011

NJZ021>025-282315-
ATLANTIC NJ-ATLANTIC COASTAL CAPE MAY NJ-CAPE MAY NJ-
COASTAL ATLANTIC NJ-CUMBERLAND NJ-
622 PM EDT THU APR 28 2011

...A STRONG THUNDERSTORM WILL AFFECT ATLANTIC...CAPE MAY AND
CUMBERLAND COUNTIES...

AT 621 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM 12 MILES NORTHWEST OF CAPE MAY...MOVING NORTHEAST
AT 50 MPH. THE THUNDERSTORM WILL BE NEAR WOODBINE...DENNISVILLE
AROUND 630 PM...PLEASANTVILLE...NORTHFIELD AROUND 645 PM...ABSECON
AND POMONA AROUND 700 PM.

WIND GUSTS TO 50 MPH ARE POSSIBLE WITH THIS STORM.

LAT...LON 3941 7434 3935 7441 3929 7452 3930 7454
      3928 7455 3925 7459 3916 7467 3896 7497
      3899 7498 3909 7491 3915 7490 3918 7497
      3918 7503 3921 7505 3954 7452

NIERENBERG

The radar

The national radar mosaic for the moment the first event began.

Open the radar archive at this moment

Event by event

1 flood. Local standard time, as filed.

Flood, Cecil

When: April 28, 6:15 PM EST to April 30, 6:00 PM EST
Where: Cecil County, Conowingo to 1.68 mi NW of Port Deposit
Cause: Heavy Rain
Reported by: River/Stream Gage
Coordinates: 39.670, -76.170

The runoff from the heavy rain that fell in the Susquehanna Basin on the 27th and 28th produced moderate flooding along the Susquehanna River from the evening of the 28th through the evening of the 30th in Cecil County. The Susquehanna River at the Conowingo Dam was above its 23.5 foot flood stage from 725 p.m. EDT on the 28th through 700 p.m. EDT on the 30th. It crested at 25.11 feet at 415 p.m. EDT on the 29th.

What these are

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 Maryland in 2011 Every state in 2011 This day in weather history Warnings in Maryland, April 2011

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: 301189.