WFO PHILADELPHIA Warnings, Watches and Advisories for Saturday, May 17, 2025

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SEVERE THUNDERSTORM WATCH

WATCH COUNTY NOTIFICATION FOR WATCH 266

NATIONAL WEATHER SERVICE MOUNT HOLLY NJ

436 PM EDT FRI MAY 16 2025

THE NATIONAL WEATHER SERVICE HAS ISSUED SEVERE THUNDERSTORM WATCH

266 IN EFFECT UNTIL MIDNIGHT EDT TONIGHT FOR THE FOLLOWING AREAS

IN DELAWARE THIS WATCH INCLUDES 3 COUNTIES

IN CENTRAL DELAWARE

KENT

IN NORTHERN DELAWARE

NEW CASTLE

IN SOUTHERN DELAWARE

SUSSEX

IN MARYLAND THIS WATCH INCLUDES 4 COUNTIES

IN NORTHEAST MARYLAND

CAROLINE KENT QUEEN ANNE'S

TALBOT

IN NEW JERSEY THIS WATCH INCLUDES 9 COUNTIES

IN CENTRAL NEW JERSEY

MERCER

IN SOUTHERN NEW JERSEY

ATLANTIC BURLINGTON CAMDEN

CAPE MAY CUMBERLAND GLOUCESTER

OCEAN SALEM

IN PENNSYLVANIA THIS WATCH INCLUDES 7 COUNTIES

IN EAST CENTRAL PENNSYLVANIA

BERKS LEHIGH

IN SOUTHEAST PENNSYLVANIA

BUCKS CHESTER DELAWARE

MONTGOMERY PHILADELPHIA

THIS INCLUDES THE CITIES OF ALLENTOWN, ATLANTIC CITY, CAMDEN,

CENTREVILLE, CHERRY HILL, CHESTERTOWN, DENTON, DEPTFORD, DOVER,

DOYLESTOWN, EASTON, GEORGETOWN, GLASSBORO, HAMMONTON, MEDIA,

MILLVILLE, MOORESTOWN, MOUNT HOLLY, NORRISTOWN, OCEAN CITY,

PENNSVILLE, PHILADELPHIA, READING, TOMS RIVER, TRENTON,

WEST CHESTER, AND WILMINGTON.

...FLOOD WARNING REMAINS IN EFFECT UNTIL LATE THIS EVENING...

* WHAT...Minor flooding is occurring.

* WHERE...East Branch Brandywine Creek below Downingtown.

* WHEN...Until late this evening.

* IMPACTS...At 6.0 feet, Open adjacent land next to the creek floods.

At 8.0 feet, Dowlin Forge Road begins to flood.

* ADDITIONAL DETAILS...

- At 3:45 PM EDT Friday the stage was 7.7 feet.

- Recent Activity...The maximum river stage in the 24 hours

ending at 3:45 PM EDT Friday was 7.7 feet.

- Forecast...The river will oscillate above flood stage with a

maximum value of 7.8 feet late this afternoon. It will fall

below flood stage this evening.

- Flood stage is 7.0 feet.

- Flood History...This crest compares to a previous crest of

7.9 feet on 08/19/2021.

- http://www.weather.gov/safety/flood

Fld Observed Forecasts (5 pm EDT)

Location Stg Stg Day/Time Sat Sun Mon

East Branch Brandywine Creek

Downingtown 7.0 7.7 Fri 3 pm EDT 3.4 MSG MSG

SEVERE THUNDERSTORM WATCH 263 REMAINS VALID UNTIL 10 PM EDT THIS

EVENING FOR THE FOLLOWING AREAS

IN PENNSYLVANIA THIS WATCH INCLUDES 15 COUNTIES

IN CENTRAL PENNSYLVANIA

ADAMS BEDFORD BLAIR

CAMBRIA CENTRE CLEARFIELD

CUMBERLAND FRANKLIN FULTON

HUNTINGDON JUNIATA MIFFLIN

PERRY SOMERSET YORK

THIS INCLUDES THE CITIES OF ALTOONA, BEDFORD, CARLISLE,

CHAMBERSBURG, CLEARFIELD, DUBOIS, GETTYSBURG, HUNTINGDON,

JOHNSTOWN, LEWISTOWN, MCCONNELLSBURG, MIFFLINTOWN, MOUNT UNION,

NEWPORT, SOMERSET, STATE COLLEGE, WAYNESBORO, AND YORK.

THE NATIONAL WEATHER SERVICE HAS EXTENDED SEVERE THUNDERSTORM

WATCH 263 TO INCLUDE THE FOLLOWING AREAS UNTIL 10 PM EDT THIS

EVENING

IN PENNSYLVANIA THIS WATCH INCLUDES 3 COUNTIES

DAUPHIN LANCASTER LEBANON

THIS INCLUDES THE CITIES OF HARRISBURG, HERSHEY, LANCASTER,

AND LEBANON.

PA

. PENNSYLVANIA COUNTIES INCLUDED ARE

ADAMS BEDFORD BLAIR

CAMBRIA CENTRE CLARION

CLEARFIELD CUMBERLAND DAUPHIN

FOREST FRANKLIN FULTON

HUNTINGDON JEFFERSON JUNIATA

LANCASTER LEBANON MIFFLIN

PERRY SOMERSET VENANGO

YORK

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