Ok, yes that's a different story! Hmmmm I haven't had any issues in this manner.

Perhaps...

when there's a storm you turn on lights that are those new type (fluorescent) and they interfere with the signal? (They do.)

or when there's a storm, you close more doors and that weakens the signal strength between the router and where you are in the house?

If neither of those match up, then contact the maker of the router and ask them (online works.)

I'm interested in the solution for you!