FIPS Codes for Counties Served by the National Weather Service in Philadelphia/Mount Holly NJ

Delaware

Kent - 010001

New Castle - 010003

Sussex - 010005

Maryland

Caroline - 024011

Cecil - 024015

Kent - 024029

Queen Anne's - 024035

Talbot - 024041

Some surrounding counties in Maryland served by other NWS offices:

Anne Arundel - 024003

Baltimore - 024005

Calvert - 024009

Dorchester - 024019

Harford - 024025

Somerset - 024039

Wicomico - 024045

Worchester - 024047

New Jersey

Atlantic - 034001

Burlington - 034005

Camden - 034007

Cape May - 034009

Cumberland - 034011

Gloucester - 034015

Hunterdon - 034019

Mercer - 034021

Middlesex - 034023

Monmouth - 034025

Morris - 034027

Ocean - 034029

Salem - 034033

Somerset - 034035

Sussex - 034037

Warren - 034041

The five Northeast New Jersey counties served by the NWS office in Upton, NY:

Bergen - 034003

Essex - 034013

Hudson - 034017

Passaic - 034031

Union - 034039

Pennsylvania

Berks - 042011

Bucks - 042017

Carbon - 042025

Chester - 042029

Delaware - 042045

Lehigh - 042077

Monroe - 042089

Montgomery - 042091

Northampton - 042095

Philadelphia - 042101

Some surrounding counties in Pennsylvania served by other NWS offices:

Lackawanna - 042069

Lancaster - 042071

Lebanon - 042075

Luzerne - 042079

Pike - 042103

Schuylkill - 042107

Wayne - 042127

Note: FIPS = Federal Information Processing System