Asides

The latest models are still unclear about the amount of cloud cover.  The short range RAP has a break in the clouds during the afternoon—

RAP cloud forecast 12:30 PM

 

The GFS maintains significant clouds in the afternoon—

GFS forecast for 12:30 PM

The GFS did best yesterday.  I guess we’ll see.

There’s not much model agreement with the cloud cover for Sunday. The high resolution models have clouds in the morning with skies clearing during the afternoon.
The GFS has more cloudiness in the afternoon.

There’s also a range of high temps, ranging from 45-50, which reflects the uncertainty in the cloud cover.

Last night, low temperatures approached 10º, (Ft Washington).  This was considerably lower than the 16º predicted by the GFS, NBM and various MOS and LAMP model products.

An average of the CMC (Canadian) and the RAP (Rapid Refresh) model would have been a better forecast.

For today, Saturday, sunny with light winds.  Most of the models have high thin clouds in the afternoon.

Thickening clouds between 2-4 PM, although the latest GFS has pushed that later until 5-6 PM.

An average of the CMC and RAP gives us a high of 30º today (Ft Washington).

Last night’s forecast still on-track for Sunday.