Weather Warnings for Pennsylvania

Issued by the National Weather Service

Current watches, warnings, and advisories for Pennsylvania
Alerts Updated: August 5, 2026, 10:00 pm  UTC


Flash Flood Warning issued August 5 at 5:09PM EDT until August 5 at 7:00PM EDT by NWS Mount Holly NJ

Summary: At 509 PM EDT, Doppler radar and automated rain gauges indicate 1 to 2 inches of rainfall have fallen across the warned area from heavy showers and embedded thunderstorms. Additional rainfall amounts up to 1 inch are possible in the warned area. Flash flooding has already been occuring. HAZARD...Flash flooding caused by thunderstorms. SOURCE...Radar and automated gauges. IMPACT...Flooding of small creeks and streams, urban areas, highways, streets, and underpasses as well as other drainage and low lying areas. Some locations that may experience flash flooding include... Trenton, Ewing, Doylestown, Byram, Bedminster, Flemington, Chalfont, Tinicum, Pennington, New Hope, Yardley and Newtown. This includes Interstate 295 in New Jersey between mile markers 65 and 76.
Severity:  Severe    Effective:  August 5, 2026, 5:09 pm      Expires:  August 5, 2026, 7:00 pm
Area:  Hunterdon, NJ; Mercer, NJ; Bucks, PA


Flash Flood Warning issued August 5 at 4:57PM EDT until August 5 at 6:30PM EDT by NWS Mount Holly NJ

Summary: FFWPHI The National Weather Service in Mount Holly has extended the * Flash Flood Warning for... Eastern Delaware County in southeastern Pennsylvania... South Central Montgomery County in southeastern Pennsylvania... Western Philadelphia County in southeastern Pennsylvania... * Until 630 PM EDT. * At 457 PM EDT, Doppler radar and automated rain gauges indicated that heavy rain was falling across the warned area. Up to 2 inches of rain have fallen. Additional rainfall amounts up to 0.5 inches are possible in the warned area. Flash flooding has already been occurring. HAZARD...Flash flooding caused by heavy rain. SOURCE...Radar and automated gauges. IMPACT...Flooding of small creeks and streams, urban areas, highways, streets, and underpasses as well as other drainage and low lying areas. * Some locations that may experience flash flooding include... Philadelphia, Chester, Yeadon, Conshohocken, Folcroft, Swarthmore, Narberth, National Park, East Lansdowne, Morris Park, Drexel Hill and Roxborough. This includes the following highways... Interstate 476 in Pennsylvania between mile markers 0 and 13. Interstate 76 in Pennsylvania between mile markers 333 and 350. Interstate 95 in Pennsylvania between mile markers 5 and 18. Interstate 676 in Pennsylvania between mile markers 0 and 1.
Severity:  Severe    Effective:  August 5, 2026, 4:57 pm      Expires:  August 5, 2026, 6:30 pm
Area:  Delaware, PA; Montgomery, PA; Philadelphia, PA


Flash Flood Warning issued August 5 at 4:45PM EDT until August 5 at 6:30PM EDT by NWS Mount Holly NJ

Summary: FFWPHI The National Weather Service in Mount Holly has extended the * Flash Flood Warning for... South Central Bucks County in southeastern Pennsylvania... Southeastern Montgomery County in southeastern Pennsylvania... Central Philadelphia County in southeastern Pennsylvania... * Until 630 PM EDT. * At 445 PM EDT, Doppler radar and automated rain gauges indicated that heavy rain was falling across the warned area. Between 1 and 2 inches of rain have fallen. Additional rainfall amounts up to 1 inch are possible in the warned area. Flash flooding has already been occurring. HAZARD...Flash flooding caused by heavy rain. SOURCE...Radar and automated gauges. IMPACT...Flooding of small creeks and streams, urban areas, highways, streets, and underpasses as well as other drainage and low lying areas. * Some locations that may experience flash flooding include... Philadelphia, Camden, Bensalem, Bristol, Palmyra, Jenkintown, Beverly, Rockledge, Abington, Langhorne, Bryn Athyn and Northeast Philadelphia. This includes the following highways... Interstate 95 in Pennsylvania between mile markers 19 and 40. Pennsylvania Turnpike between mile markers 348 and 355.
Severity:  Severe    Effective:  August 5, 2026, 4:45 pm      Expires:  August 5, 2026, 6:30 pm
Area:  Bucks, PA; Montgomery, PA; Philadelphia, PA


Flash Flood Warning issued August 5 at 4:13PM EDT until August 5 at 6:15PM EDT by NWS Mount Holly NJ

Summary: At 413 PM EDT, Doppler radar and automated rain gauges indicated rain amounts of 1 to 2 inches have fallen within portions of the warned area leading to reports of flash flooding. Additional rainfall amounts up to 1 inch are possible in the warned area as more heavy rainfall moves through late this afternoon. Flash flooding is ongoing or expected to begin shortly. HAZARD...Flash flooding caused by thunderstorms. SOURCE...Radar and automated gauges. IMPACT...Flooding of small creeks and streams, urban areas, highways, streets, and underpasses as well as other drainage and low lying areas. Some locations that may experience flash flooding include... Philadelphia, Lansdale, East Norriton, Doylestown, Hatboro, Ambler, Chalfont, New Hope, Yardley, Newtown, Abington and Langhorne. This includes the following highways... Northeast Extension between mile markers 21 and 28. Pennsylvania Turnpike between mile markers 333 and 348.
Severity:  Severe    Effective:  August 5, 2026, 4:13 pm      Expires:  August 5, 2026, 6:15 pm
Area:  Bucks, PA; Montgomery, PA


Heat Advisory issued August 5 at 1:50PM EDT until August 7 at 8:00PM EDT by NWS Mount Holly NJ

Summary: * WHAT...Heat index values up to 100 to 104 expected. * WHERE...Portions of northern Delaware, central, northern, and southern New Jersey, and southeast Pennsylvania. * WHEN...From 10 AM Thursday to 8 PM EDT Friday. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses.
Severity:  Moderate    Effective:  August 5, 2026, 1:50 pm      Expires:  August 6, 2026, 7:00 am
Area:  New Castle; Somerset; Middlesex; Western Monmouth; Mercer; Gloucester; Camden; Northwestern Burlington; Ocean; Southeastern Burlington; Delaware; Philadelphia; Eastern Chester; Eastern Montgomery; Lower Bucks


Heat Advisory issued August 5 at 1:50PM EDT until August 7 at 8:00PM EDT by NWS Mount Holly NJ

Summary: * WHAT...Heat index values around 100 expected. * WHERE...Portions of northern and northwest New Jersey and east central, northeast, and southeast Pennsylvania. * WHEN...From 10 AM Thursday to 8 PM EDT Friday. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses.
Severity:  Moderate    Effective:  August 5, 2026, 1:50 pm      Expires:  August 6, 2026, 7:00 am
Area:  Sussex; Warren; Morris; Hunterdon; Carbon; Monroe; Berks; Lehigh; Northampton; Western Chester; Western Montgomery; Upper Bucks