Disco from Mount Holly on the rain threat for later today and tonight-
The main focus for this evening and tonight will be the potential for convection. The greatest instability will be located across our western zones this afternoon and early evening. Guidance indicates this will spread east into tonight as the aforementioned height falls and shortwaves begin streaming into the area. Guidance, including the CAMs, are notoriously poor at accurately modeling these types of subtly forced nocturnal convective regimes. If you need any proof, have a look at the past several days upstream across the central CONUS. Thus predictability and confidence in the details of the convection for tonight is low. Fortunately we do have some synoptic clues to help us out. As of now, it appears the greatest potential for convection will begin ramping up in our western zones around 4-6 PM or so, with increasing chances of convection spreading gradually eastward by the 8 PM to 12 AM time frame. The greatest height falls and instability appear to be during the 12-4 AM time frame, thus this is when PoPs with this forecast package are the greatest in the likely range. As one may guess, the PoPs will likely need to be adjusted in future updates as confidence in the details of timing and coverage of convection increase.