Weather Warnings for Pennsylvania

Issued by the National Weather Service

Current watches, warnings, and advisories for Pennsylvania
Alerts Updated: April 21, 2026, 6:41 am  UTC


Freeze Warning issued April 21 at 2:38AM EDT until April 21 at 10:00AM EDT by NWS Mount Holly NJ

Summary: * WHAT...Sub-freezing temperatures as low as 18. * WHERE...In New Jersey, Sussex County. In Pennsylvania, Carbon and Monroe Counties. * WHEN...Until 10 AM EDT this morning. * IMPACTS...Frost and freeze conditions could kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing.
Severity:  Moderate    Effective:  April 21, 2026, 2:38 am      Expires:  April 21, 2026, 10:00 am
Area:  Sussex; Carbon; Monroe


Freeze Warning issued April 21 at 2:38AM EDT until April 21 at 9:00AM EDT by NWS Mount Holly NJ

Summary: * WHAT...Sub-freezing temperatures as low as 24. * WHERE...In Delaware, New Castle County. In Pennsylvania, Delaware and Philadelphia Counties. * WHEN...Until 9 AM EDT this morning. * IMPACTS...Frost and freeze conditions could kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing.
Severity:  Moderate    Effective:  April 21, 2026, 2:38 am      Expires:  April 21, 2026, 9:00 am
Area:  New Castle; Delaware; Philadelphia


Freeze Warning issued April 21 at 2:38AM EDT until April 21 at 9:00AM EDT by NWS Mount Holly NJ

Summary: * WHAT...Sub-freezing temperatures as low as 22. * WHERE...Portions of central, northern, northwest, and southern New Jersey and east central and southeast Pennsylvania. * WHEN...Until 9 AM EDT this morning. * IMPACTS...Frost and freeze conditions could kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing.
Severity:  Moderate    Effective:  April 21, 2026, 2:38 am      Expires:  April 21, 2026, 9:00 am
Area:  Warren; Morris; Hunterdon; Somerset; Middlesex; Western Monmouth; Eastern Monmouth; Mercer; Salem; Gloucester; Camden; Northwestern Burlington; Ocean; Cumberland; Atlantic; Cape May; Southeastern Burlington; Berks; Lehigh; Northampton; Western Chester; Eastern Chester; Western Montgomery; Eastern Montgomery; Upper Bucks; Lower Bucks


Freeze Warning issued April 21 at 2:24AM EDT until April 21 at 11:00AM EDT by NWS State College PA

Summary: * WHAT...Sub-freezing temperatures in the upper teens and lower 20s. * WHERE...Cameron, Clearfield, Elk, McKean, Northern Centre, Northern Clinton, and Warren Counties. * WHEN...Until 11 AM EDT this morning. * IMPACTS...Frost and freeze conditions could kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing.
Severity:  Moderate    Effective:  April 21, 2026, 2:24 am      Expires:  April 21, 2026, 11:00 am
Area:  Warren; McKean; Elk; Cameron; Northern Clinton; Clearfield; Northern Centre


Freeze Warning issued April 21 at 2:24AM EDT until April 21 at 9:00AM EDT by NWS State College PA

Summary: * WHAT...Sub-freezing temperatures in the 25 to 30 degree range. * WHERE...A portion of central Pennsylvania. * WHEN...Until 9 AM EDT this morning. * IMPACTS...Frost and freeze conditions could kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing.
Severity:  Moderate    Effective:  April 21, 2026, 2:24 am      Expires:  April 21, 2026, 9:00 am
Area:  Southern Centre; Cambria; Blair; Huntingdon; Mifflin; Juniata; Somerset; Bedford; Fulton; Franklin; Southern Clinton; Southern Lycoming; Union; Snyder; Montour; Northumberland; Columbia; Perry; Dauphin; Schuylkill; Lebanon; Cumberland; Adams; York; Lancaster


Freeze Warning issued April 21 at 1:30AM EDT until April 21 at 9:00AM EDT by NWS Pittsburgh PA

Summary: * WHAT...Sub-freezing temperatures from 25 to 30. * WHERE...Portions of east central Ohio, western Pennsylvania, and northern West Virginia. * WHEN...Until 9 AM EDT this morning. * IMPACTS...Frost and freeze conditions could kill crops and other sensitive vegetation.
Severity:  Moderate    Effective:  April 21, 2026, 1:30 am      Expires:  April 21, 2026, 9:00 am
Area:  Tuscarawas; Carroll; Columbiana; Coshocton; Harrison; Jefferson; Muskingum; Guernsey; Belmont; Noble; Monroe; Mercer; Venango; Forest; Lawrence; Butler; Clarion; Jefferson; Beaver; Allegheny; Armstrong; Washington; Greene; Westmoreland; Westmoreland Ridges; Fayette; Fayette Ridges; Indiana; Higher Elevations of Indiana; Hancock; Brooke; Ohio; Marshall; Wetzel; Marion; Monongalia; Ridges of Eastern Monongalia and Northwestern Preston; Preston; Eastern Preston; Western Tucker; Eastern Tucker


Freeze Warning issued April 20 at 10:50PM EDT until April 21 at 10:00AM EDT by NWS Cleveland OH

Summary: * WHAT...Sub-freezing temperatures as cold as the middle 20's to lower 30's expected. * WHERE...Portions of north central, northeast, and northwest Ohio and northwest Pennsylvania. * WHEN...Until 10 AM EDT Tuesday. * IMPACTS...Frost and freeze conditions could kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing.
Severity:  Moderate    Effective:  April 20, 2026, 10:50 pm      Expires:  April 21, 2026, 10:00 am
Area:  Erie; Lorain; Cuyahoga; Lake; Geauga; Ashtabula Inland; Seneca; Huron; Medina; Summit; Portage; Trumbull; Wyandot; Crawford; Richland; Ashland; Wayne; Stark; Mahoning; Marion; Morrow; Holmes; Knox; Ashtabula Lakeshore; Northern Erie; Southern Erie; Crawford