Imagine a satellite in geosynchronous orbit that slightly focuses the infrared radiation of the sun onto a small area of open ocean. Assuming perfect conditions (ex: no cloud cover), full functionality, and a low risk of being destroyed, would this satellite be able to create a low pressure system that can be used as a weapon? What other forms of weather systems could this satellite create?

Imagine a satellite in geosynchronous orbit that slightly focuses the infrared radiation of the sun onto a small area of open ocean. Assuming perfect conditions (ex: no cloud cover), full functionality, and a low risk of being destroyed, would this satellite be able to create a low pressure system that can be used as a weapon? What other forms of weather systems could this satellite create?

No.

Any extra solar energy that the satellite could send to earth would be negligible.

A parabolic mirror 1000s of miles across maybe..

Assuming perfect conditions (ex: no cloud cover)
This isn't compatible with creating storms.

The atmosphere doesn't work that way. Using a satellite to add heat to a small area isn't going to create a storm. If you're shooting for a mid-latitude cyclone you'll need a mass warm air, a mass of cold air, moisture in the low-levels of the atmosphere, and an area of convergence like a front. If it's a tropical cyclone in addition to heat you'll need, low wind shear, a helluva lot of moisture in the low and mid-levels of the atmosphere, and a pre-existing wave of convergence to act as a triggering mechanism. If you were somehow able to create a storm, it would be near impossible to steer it to the location you want it to go. I know this because I'm a Meteorology major.

A large mirror would create a lot more heat, but wouldn't neccesarily create storms to do your bidding, although it may cause some crazy unpredictable stuff to happen.

So, no it's not a viable weapon in the near future anyway.

Well, provided you could get a huge reflector you could probably get the weather to do some things you'd like.

But really, it would be an absurd weapon, it would be ineffective against hardened military targets and would mostly destroy civilians, it would be imprecise, it would be slow giving a lot of warning ahead of time to the enemy, and it would be really expensive. Maybe if you were already using it for something else it would have value, but as purpose built weapon you'd be better off using nuclear or conventional weaponry.

It would be most effective when used as in Diamonds are Forever. It couldn't make weather anomalies but it could make its target areas very unpleasant.

Infrared rays don't work. I heard somewhere americans are developing somethings similar using radio waves from radio station in Alaska. If i found the article i will post it

Well, IR could work, but it would make sense to reflect the much more energetic visable spectrum, and possibly UV too.