If you look at the National League site, go to fixtures and select the National North League you will see the list of fixtures for tomorrow.
According to that list there are 11 fixtures. As at 8am three of them are shown as being postponed.
Here's the list:
AFC Fylde v Gateshead
AFC Telford v Blyth Spartans - Postponed
Bradford PA v Hereford
Curzon Ashton v Brackley Town - Postponed
Gloucester v Chorley
Guiseley v Boston
Kidderminster v Darlington
Leamington v Chester
Southport v Kettering
Spennymoor v Alfreton - Postponed
York City v Farsley Celtic
However Bradford's game against Hereford isn't going ahead, Gateshead have said they are not travelling to AFC Fylde and Farsley Celtic are unwilling to fulfil their game at York. So that's three more called off (subject to confirmation by the National League)
Last Saturday Guiseley backed out of playing AFC Fylde so that's in some doubt especially as there is a pitch inspection this afternoon.
So out of eleven, may be only four will go ahead.