There isn't enough chaff on a C-130 to begin to create that kind of image on a weather radar or any other type of radar. I have over 5000 hours in the C-130 and am familiar with the chaff and flare capabilities they have. You want enough chaff to confuse a radar-guided missile homing in on you. You don't want so much that you show every radar in an entire enemy country where you are and what direction you're heading.
Would ‘t the radar returns be messed up for quite some distance down range from the chaff? There wouldn’t necessarily be chaff over that wide swath.
Without getting into too much detail, I’m one of the EW OPFOR guys your crews go up against, and I’ve seen massive chaff clouds on my PPI from C-130’s. Enough chaff to kill my picture of the valley we operate from. It can be enough to screw up our MTI.