Not the DGEX but I've been fiddling with Earl Barker's page today trying to render some of his classic graphics. Sadly no luck on my end yet. If anybody can conjure an Earl NAMing please post it.
https://www.wxcaster.com/models_main.htm
It's the responsible thing to do. Gives a nice spread of 3 to 8, acknowledging uncertainty but bracing for the worst. Waiting until the last minute in order to be the most correct defeats the purpose of the statement.