Now if ur talking sunami kinda weather,Where the rains blowing sideways etc.Stay in bed!!!LOL.
i have killed many gobblers in a steady rain,Picked birds up after laying them over,they would be soaking wet!They still come in gobbling!(plus if hunting public land,less hunters in woods!

)
But if theres wind with the rain,wait it out or just save your energy for another day.
Key is find in ur area where they roost when the bad weather is coming.Usually its lower in the terrain u hunt.In pines or trees with the most foliage.Try to setup above them if hunting area with birds roosting down in thickets where terrain is lower,Get within 100yrds if possible.
Hope this helps....