Spring Grove, PA Weather Forecast

Key Messages

1) Periods of rain continue into tonight associated with the remnants of Isaias

2) Big temperature swing forecast for the week ahead

Discussion

... KEY MESSAGE 1: Periods of rain continue into tonight associated with the remnants of Isaias

Steady light to moderate rain (rates generally <0.50 in/hr) will be most persistent along and east of the Allegheny Front this evening into tonight. Increasing MUCAPE and elevated instability could result in some locally heavy, short duration rain/rates across south central PA into tonight. Much of this area has already picked up 1-2" since Saturday evening, so we still can`t rule out some isolated runoff problems. Otherwise, the prolonged dry run leading up to this Isaias rain event has allowed a sufficient cushion for what has largely been a duration type heavy rain episode with some locations ticking over 3 inches in the past 24 hours. Current MA/OH RFC river guidance keeps all fcst points below action stages, thanks to very low flows at the start of the event.

KEY MESSAGE 2: Big temperature swing forecast for the week ahead

Noticeably warmer and more humid conditions expected early this week with max temps on Tuesday forecast to peak 10-15 degrees above the histo...