Image above (courtesy TropicalTidbits.com) shows the 500mb (upper level pattern) from Wednesday afternoon through Friday. An upper level trough may close off across the Ohio Valley spawning cyclogenesis (coastal low pressure) development off of the Virginia coastline. This possible Nor’easter could slowly move northeast bringing widespread beneficial rain to areas that have been so dry!
Global Ensemble Forecast System (GEFS) is also showing pretty good agreement of surface low pressure system forming (little red numbers represent various placements of low pressure formation and track through time).
The image below also shows that the European Ensemble is in agreement! Good news for those of us who want drought relief and pretty fall foliage.
And for those of you who are sick of the weeks of sunshine and hot weather (including your gardens) the image below shows that this week should progressively get colder if indeed we have steady rain falling. Highs may not get out of the 50s or 60s if this Nor’easter materializes! The image below shows cooler than average temperatures Thursday through Saturday for the Mid-Atlantic and southeast.