A meridional flow is presently residing over the United States, a ridge axis in the west extending through Idaho and Nevada is allowing warm, dry air to make its way into the western portion of the U.S. Whereas in the east, a neutrally tilted trough axis extends over the southeastern states bringing with it on the back side cool arctic air. A cold front associated with an occluded low up in Canada will pass through the area overnight tonight bringing with it dry, cold air to help drop the temps going into the weekend. A high pressure will be taking over the central U.S. and bringing with it anti-cyclonic flow from the north. Highs are expected to be only in the low to mid 70′s for Friday and Saturday due to the northerly flow. Heading into Saturday night temperatures will really begin to fall as sinking air from the strong surface high will be influencing temperatures for Sunday and Monday.
Models are having trouble agreeing with Sunday’s weather. The European model shows a decent amount of rain in the Ohio Valley region pushing through early Sunday morning and moving slowly out by Monday morning. The GFS and NAM are not showing much in the way of any precipitation in the area. The two show a small disturbance north of the area early Sunday morning and having it become more of a threat to the east of our area as it heads southeast. The GFS and NAM however with the past run modeled the disturbance to be further west then previous runs and output some rain showers closer to the area. Still not affecting us at the moment according the those, but will we see the GFS and NAM trend back even more and come to an agreement with the European model? I will post more on this Friday and Saturday.
Otherwise, enjoy the cool temperatures and clear skies as they will persist through Saturday night. Once again expect highs in the low to mid 70′s for Friday and Saturday with lows in the mid 40′s at night. Sunday will be much cooler with a high in the low to mid 60′s with a 30% chance of rain. Low on Sunday around 40. Will update rain chances tomorrow, enjoy your weekend!