Latest short range model guidance indicates a cluster of thunderstorms developing across Southwest PA late this morning, before strengthening as they head into Central PA by the early afternoon. The cluster of storms is then expected to make its way into Eastern PA by late this afternoon. Damaging winds are the main concern, along with isolated hail and a very isolated tornado chance. Below is the SPC Risk Map for today (Friday May 20).

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Below is the HRRR model run from 5:00 AM this morning for the storms. Overall, late morning in SWPA, early afternoon in SCPA, and late afternoon in SEPA. You can always get the latest model runs on interactive maps centered on your area in our app!

Be sure to share this last-second forecast with family and friends who may be impacted.

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Last updated on May 21, 2022
Josh has been passionate about weather as long as his memory dates! From watching the Weather Channel at age 7, to making hand-drawn hurricane maps at age 11, starting his first weather site at 13, and founding PWA at 15 and forecasting for the state for the past 9 years, Josh's interest in weather has never dwindled! As difficult as it is, he greatly enjoys forecasting for Pennsylvania due to its countless microclimates. The state is an East Coast severe weather hotspot and nearly always home to the rain/snow line during winter storms!
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