Nicole Morris

Severe thunderstorms are expected Tuesday across the Susquehanna Valley, with an enhanced risk of damaging winds, heavy rain, hail, and isolated tornadoes. A warm front arriving early brings morning showers, while the primary threat window for strong to severe storms is from 2 PM to 8 PM. Conditions improve after midweek as humidity drops and dry, sunny weather returns Thursday and Friday, with additional storm chances late in the weekend and early next week.

Temperatures in the Susquehanna Valley during the first half of 2026 showed frequent swings but averaged close to normal, with record highs and lows set in January and June. Precipitation remained below average, despite a major January snowfall, contributing to an ongoing drought that has persisted since late 2025. A wetter start to July may reduce the deficit, but conditions remain uncertain.

A flood watch remains in effect for south‑central Pennsylvania as scattered showers and thunderstorms continue, posing risks of excessive rainfall and localized flooding, especially in vulnerable low‑lying and poor‑drainage areas. Eastern counties face a higher risk level, while western areas have a marginal threat. Conditions begin to improve Monday night, with cooler, humid weather lingering into Tuesday. High pressure brings a drier day Wednesday before storm chances return later in the week. The upcoming weekend is expected to be mostly dry with seasonable temperatures, though muggy conditions and slight storm risks persist.

Extreme heat is forecast for the Susquehanna Valley from Wednesday through Friday, with temperatures near or above 100 degrees and heat index values reaching 105 to 110 degrees. Conditions remain hot and humid through the week, with limited storm chances until the weekend. A gradual cooldown begins on Independence Day, with temperatures returning to seasonal averages early next week as storm chances increase.

Forecasts show an extended heatwave for the Susquehanna Valley, with an Extreme Heat Watch in effect from Wednesday afternoon through Friday evening. Temperatures are expected to approach or reach 100 degrees, with heat index values as high as 105 to 110 due to high humidity. Conditions remain hot through the Independence Day weekend before trending closer to average early next week, though rain will remain limited as the region continues to experience one of its driest Junes on record.