Active Weather Alerts
Severe Thunderstorm Warning
Issued: 6:55 PM Aug. 20, 2026 – National Weather Service
The National Weather Service in State College PA has issued a * Severe Thunderstorm Warning for... Northern Adams County in south central Pennsylvania... Southwestern Cumberland County in south central Pennsylvania... East central Franklin County in south central Pennsylvania... Northwestern York County in south central Pennsylvania... * Until 345 PM EDT. * At 255 PM EDT, severe thunderstorms were located along a line extending from Walnut Bottom to near Pine Grove Furnace to Fayetteville, moving east at 30 mph. HAZARD...60 mph wind gusts. SOURCE...Radar indicated. IMPACT...Expect damage to roofs, siding, and trees. * Locations impacted include... Hampton, Dillsburg, Lake Meade, Mount Holly Springs, New Oxford, East Berlin, Cashtown, Aspers, Walnut Bottom, Pine Grove Furnace, Biglerville, and Arendtsville. Radar has indicated rotation within these severe thunderstorms. Although a tornado is not immediately likely, tornadoes can develop quickly during severe thunderstorms. This includes Interstate 81 from mile markers 31 to 36. PRECAUTIONARY/PREPAREDNESS ACTIONS... Stay inside a well built structure and keep away from windows. To report severe weather, contact your nearest law enforcement agency. They will send your report to the National Weather Service office in State College PA. && TORNADO...POSSIBLE; HAIL THREAT...RADAR INDICATED; MAX HAIL SIZE...<.75 IN; WIND THREAT...RADAR INDICATED; MAX WIND GUST...60 MPH
Severe Thunderstorm Watch
Issued: 6:31 PM Aug. 20, 2026 – National Weather Service
THE NATIONAL WEATHER SERVICE HAS ISSUED SEVERE THUNDERSTORM WATCH 604 IN EFFECT UNTIL 10 PM EDT THIS EVENING FOR THE FOLLOWING AREAS IN PENNSYLVANIA THIS WATCH INCLUDES 4 COUNTIES IN CENTRAL PENNSYLVANIA ADAMS LANCASTER LEBANON YORK THIS INCLUDES THE CITIES OF GETTYSBURG, LANCASTER, LEBANON, AND YORK.
Special Weather Statement
Issued: 5:15 PM Aug. 20, 2026 – National Weather Service
...A LINE OF OF THUNDERSTORMS WILL GRADUALLY STRENGTHEN ACROSS SOUTH-CENTRAL PENNSYLVANIA AND THE LOWER SUSQUEHANNA VALLEY THROUGH THE AFTERNOON HOURS... Thunderstorms developing from Southern Huntingdon County, south along the Interstate 70 corridor at 115 PM will move east at 35 to 40 mph and strengthen during the mid afternoon as they move along the Interstate 76 and 81 corridors and approach the Lower Susquehanna Valley, including the Greater Harrisburg, York areas between 230 PM and 3 PM. This line of potentially severe thunderstorms will cross much of Schuylkill, Lebanon and Lancaster Counties between 245 PM and 415 PM. Additional heavy rain and thunderstorms will follow this initial line of storms and continue into the evening hours. * Wind gusts up to 55 MPH. * Hail up to dime size. * Very heavy rainfall of 1 to 2 inches per hour. If outdoors, consider seeking shelter inside a building. Monitor local radio stations and available television stations for additional information and possible warnings from your National Weather Service.
Flood Watch
Issued: 4:14 PM Aug. 20, 2026 – National Weather Service
...FLOOD WATCH IN EFFECT UNTIL 8 PM EDT THIS EVENING... * WHAT...Flash flooding caused by excessive rainfall continues to be possible. * WHERE...A portion of central Pennsylvania, including the following areas, Columbia, Dauphin, Lancaster, Lebanon, Montour, Northern Clinton, Northern Lycoming, Northumberland, Schuylkill, Snyder, Southern Clinton, Southern Lycoming, Sullivan, Union and York. * WHEN...Until 8 PM EDT this evening. * IMPACTS...Excessive runoff may result in flooding of rivers, creeks, streams, and other low-lying and flood-prone locations. Creeks and streams may rise out of their banks. Flooding may occur in poor drainage and urban areas. * ADDITIONAL DETAILS... - Periods of heavy rain are expected this afternoon through the evening. Rainfall amounts up to 3 inches are possible. - http://www.weather.gov/safety/flood
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