they are trying, i'm sure, but i am quite familiar with the tech they have at their disposal... burning holes in the ionosphere with a microwave array mainly, maybe a few of them focusing on one place to pull open a hole through which extra solar wind is gonna pass down into the vertical and stimulate a low pressure zone and change the wind direction for a while

but causing a sudden storm that dumps a few inches and a storm that dumps more than a yard of water is a really big difference