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LOCK HAVEN -- Waves of thunderstorms -- with some possibly strong or severe -- will crash through Central Pennsylvania in the coming days. A prolonged period of disturbed weather will begin today, with a chance of showers and thunderstorms slowly creeping into the area.
That chance will ratchet up Friday and Saturday. Sunday looks to be a break in the action, but another round will begin on Monday and looks to last through the middle of next week.
Keep in mind that many area streams and creeks are already running high in their banks after this past weekend's storm brought several inches of rain to much of the area.
Those streams and creeks remain at risk for flooding as new rounds of storms approach -- especially since heavy rain will be one of the chief threats with this system.
This is caused in part by a much-increased humidity level, but also exacerbated by hot temperatures returning, starting today.
Look for highs near 90, with little relief until next week. This heat, combined with the elevated humidity, will cause potentially dangerous heat index values.
National Weather Service forecasters note that heat index values will be pushing 100 in urban environments -- meaning places with heat island effects. Heat islands are locations with a lot of buildings, infrastructure, roads, parking lots and so forth. These types of areas can produce temperatures up to 7 degrees hotter than surrounding areas which have more greenery or sparser development.
While this doesn't affect much of central PA, there are still urbanized environments in the city centers of many of the towns in the region which will still produce a heat island effect.
This weather pattern is likely to remain in place through the middle of next week, when long-range models are showing a frontal system pushing through, which will dislodge the Atlantic steering high which is directing all of this our way.
Look for that system to potentially bring particularly heavy impacts. More information on that will be made available as we get closer and the models become a bit more certain.
In the meantime, be sure to take adequate precautions as you look to enjoy the various offerings that will grace Clinton County heading into the weekend -- a particularly packed time which includes the end of the Clinton County Fair, Lock Haven JAMS, the USCA National Kayak event and more.
Stay hydrated, and remember to never drive into water which may be covering roadways.