Rather than focusing on accumulations of solids and semi solids it strikes me that there is a strong possibility of a Mini Ice Storm in certain areas with utterly lethal conditions for some, most likely 7-10am on monday morning.
We had a localised one here in Galway in Feb 2009. Here is the scenario.
1. Council grits road saturday night.
2. Sharp showers such as those already experienced today Saturday wash the salt away afterwards. Council does not regrit.
3. Hard Freeze Sunday night under generally clear skies. Ground rather wet at onset of freeze.
4. Possibly random shower falls on hard frozen ground. Freezes into an icy film on contact. No salt to counteract effects.
On that morning in February 2009 I went out to the car and could hardly stand up on the doorstep never mind further out. However as the sun can be quite strong at this time of year most of it will melt by 10-11am. It is very dangerous underfoot for infirm people and children who could do themselves a nasty injury.
I am advising anyone who may be apprehensive to have a look at the Met Eireann radar sequence before setting out Monday morning to check whether a shower could have fallen on frozen ground near them overnight.
You will have absolutely no grip at all, do not travel unless you must.