Yes, by hex editing;
Code27909 | $04:F709 | 1 byte | Overworld: Submaps on where to
disable the thunder effect (originally used in Valley of Bowser).
#$80 - Main map
#$40 - Yoshi's Island
#$20 - Vanilla Dome
#$10 - Forest of Illusion
#$08 - Valley of Bowser
#$04 - Special World
#$02 - Star World
#$01 - Unused
Note that the bits in this address disables the thunder in this submap,
so to disable it everywhere, #$FF is the correct value. This address
affects both colors and sound.
If you don't have a hex editor, download from
here, open your rom with it, and press CTRL G to find the address and type "27909" and change [F7] to [FF] (binary: 1 = disable lightning, 0 = enable lightning).
You can use windows calculator and go to view > scientific (windows XP) or view > convert > programmers mode (I think...)(for windows 7) if you are converting binary to hex or
use here if you want two+ maps with lightnings.
Give thanks to RPG hacker for working on Asar.