Weather Warnings for Pennsylvania

Issued by the National Weather Service

Current watches, warnings, and advisories for Pennsylvania
Alerts Updated: April 18, 2026, 8:01 pm  UTC


Coastal Flood Advisory issued April 18 at 4:00PM EDT until April 19 at 6:00AM EDT by NWS Mount Holly NJ

Summary: * WHAT...Up to one foot of inundation above ground level expected in low-lying areas near shorelines and tidal waterways. * WHERE...In New Jersey, Gloucester, Camden and Northwestern Burlington. In Pennsylvania, Delaware, Philadelphia and Lower Bucks. * WHEN...From 1 AM to 6 AM EDT Sunday. * IMPACTS...At this level, flooding begins on the most vulnerable roads along tidal waterways. Some partial or full road closures are possible.
Severity:  Minor    Effective:  April 18, 2026, 4:00 pm      Expires:  April 19, 2026, 6:00 am
Area:  Gloucester; Camden; Northwestern Burlington; Delaware; Philadelphia; Lower Bucks


Freeze Watch issued April 18 at 1:29PM EDT until April 20 at 11:00AM EDT by NWS Cleveland OH

Summary: * WHAT...Sub-freezing temperatures in the lower 20's to lower 30's are possible. * WHERE...Portions of north-central, northeast, and northwest Ohio and northwest Pennsylvania. * WHEN...From Sunday evening through Monday morning. * IMPACTS...Frost and freeze conditions could kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing.
Severity:  Severe    Effective:  April 18, 2026, 1:29 pm      Expires:  April 19, 2026, 12:00 am
Area:  Ottawa; Sandusky; Erie; Lorain; Cuyahoga; Lake; Geauga; Ashtabula Inland; Hancock; Seneca; Huron; Medina; Summit; Portage; Trumbull; Wyandot; Crawford; Richland; Ashland; Wayne; Stark; Mahoning; Marion; Morrow; Holmes; Knox; Ashtabula Lakeshore; Northern Erie; Southern Erie; Crawford


Freeze Watch issued April 18 at 1:02PM EDT until April 21 at 9:00AM EDT by NWS Mount Holly NJ

Summary: * WHAT...Sub-freezing temperatures with lows in the 20s. * WHERE...Portions of central, northern, northwest and southern New Jersey and east central, northeast and southeast Pennsylvania. * WHEN...From late Monday night through Tuesday morning. * IMPACTS...Frost and freeze conditions could kill crops, other sensitive vegetation.
Severity:  Severe    Effective:  April 18, 2026, 1:02 pm      Expires:  April 19, 2026, 2:15 am
Area:  Sussex; Warren; Morris; Hunterdon; Somerset; Middlesex; Western Monmouth; Mercer; Salem; Gloucester; Camden; Northwestern Burlington; Ocean; Cumberland; Atlantic; Cape May; Southeastern Burlington; Carbon; Monroe; Berks; Lehigh; Northampton; Western Chester; Eastern Chester; Western Montgomery; Eastern Montgomery; Upper Bucks; Lower Bucks


Freeze Watch issued April 18 at 12:56PM EDT until April 20 at 9:00AM EDT by NWS Pittsburgh PA

Summary: * WHAT...Sub-freezing temperatures as low as 29 possible. * WHERE...Portions of east central Ohio, northwest, southwest, and western Pennsylvania, and northern West Virginia. * WHEN...From late Sunday night through Monday morning. * IMPACTS...Frost and freeze conditions could kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing. * ADDITIONAL DETAILS...Another higher threat for sub-freezing temperatures is expected Monday night with additional headlines very likely.
Severity:  Severe    Effective:  April 18, 2026, 12:56 pm      Expires:  April 18, 2026, 10:00 pm
Area:  Tuscarawas; Carroll; Columbiana; Coshocton; Harrison; Jefferson; Muskingum; Guernsey; Mercer; Venango; Forest; Lawrence; Butler; Clarion; Jefferson; Beaver; Armstrong; Westmoreland Ridges; Fayette Ridges; Indiana; Higher Elevations of Indiana; Hancock; Ridges of Eastern Monongalia and Northwestern Preston; Preston; Eastern Preston; Western Tucker; Eastern Tucker


Freeze Watch issued April 18 at 12:33PM EDT until April 20 at 9:00AM EDT by NWS State College PA

Summary: * WHAT...For the first Freeze Watch, sub-freezing temperatures as low as 26 possible. For the second Freeze Watch, sub-freezing temperatures as low as 22 possible. * WHERE...Cameron, Clearfield, Elk, McKean, Northern Centre, Northern Clinton, and Warren Counties. * WHEN...For the first Freeze Watch, from late Sunday night through Monday morning. For the second Freeze Watch, from late Monday night through Tuesday morning. * IMPACTS...Frost and freeze conditions could kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing.
Severity:  Severe    Effective:  April 18, 2026, 12:33 pm      Expires:  April 19, 2026, 12:45 am
Area:  Warren; McKean; Elk; Cameron; Northern Clinton; Clearfield; Northern Centre


Freeze Watch issued April 18 at 12:33PM EDT until April 20 at 9:00AM EDT by NWS State College PA

Summary: * WHAT...For the first Freeze Watch, sub-freezing temperatures as low as 31 possible. For the second Freeze Watch, sub-freezing temperatures as low as 24 possible. * WHERE...Blair, Cambria, Somerset, Southern Centre, Southern Clinton, and Southern Lycoming Counties. * WHEN...For the first Freeze Watch, from late Sunday night through Monday morning. For the second Freeze Watch, from late Monday night through Tuesday morning. * IMPACTS...Frost and freeze conditions could kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing.
Severity:  Severe    Effective:  April 18, 2026, 12:33 pm      Expires:  April 19, 2026, 12:45 am
Area:  Southern Centre; Cambria; Blair; Somerset; Southern Clinton; Southern Lycoming


Freeze Watch issued April 18 at 12:33PM EDT until April 21 at 9:00AM EDT by NWS State College PA

Summary: * WHAT...Sub-freezing temperatures as low as 26 possible. * WHERE...A portion of central Pennsylvania. * WHEN...From late Monday night through Tuesday morning. * IMPACTS...Frost and freeze conditions could kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing.
Severity:  Severe    Effective:  April 18, 2026, 12:33 pm      Expires:  April 19, 2026, 12:45 am
Area:  Huntingdon; Mifflin; Juniata; Bedford; Fulton; Franklin; Union; Snyder; Montour; Northumberland; Columbia; Perry; Dauphin; Schuylkill; Lebanon; Cumberland; Adams; York; Lancaster


Freeze Watch issued April 18 at 12:33PM EDT until April 21 at 9:00AM EDT by NWS State College PA

Summary: * WHAT...For the first Freeze Watch, sub-freezing temperatures as low as 31 possible. For the second Freeze Watch, sub-freezing temperatures as low as 24 possible. * WHERE...Blair, Cambria, Somerset, Southern Centre, Southern Clinton, and Southern Lycoming Counties. * WHEN...For the first Freeze Watch, from late Sunday night through Monday morning. For the second Freeze Watch, from late Monday night through Tuesday morning. * IMPACTS...Frost and freeze conditions could kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing.
Severity:  Severe    Effective:  April 18, 2026, 12:33 pm      Expires:  April 19, 2026, 12:45 am
Area:  Southern Centre; Cambria; Blair; Somerset; Southern Clinton; Southern Lycoming


Freeze Watch issued April 18 at 12:33PM EDT until April 21 at 11:00AM EDT by NWS State College PA

Summary: * WHAT...For the first Freeze Watch, sub-freezing temperatures as low as 26 possible. For the second Freeze Watch, sub-freezing temperatures as low as 22 possible. * WHERE...Cameron, Clearfield, Elk, McKean, Northern Centre, Northern Clinton, and Warren Counties. * WHEN...For the first Freeze Watch, from late Sunday night through Monday morning. For the second Freeze Watch, from late Monday night through Tuesday morning. * IMPACTS...Frost and freeze conditions could kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing.
Severity:  Severe    Effective:  April 18, 2026, 12:33 pm      Expires:  April 19, 2026, 12:45 am
Area:  Warren; McKean; Elk; Cameron; Northern Clinton; Clearfield; Northern Centre