Learn Hardcore Arabic (Modern Standard): ربما يقرر صديقي أن يذهب بالحافلة إذا كان الطقس باردا. - Maybe my friend will decide to go by bus if the weather is cold.

Breakdown of ربما يقرر صديقي أن يذهب بالحافلة إذا كان الطقس باردا.

What does ربما mean here, and how strong is it?

ربما means perhaps, maybe, or sometimes probably, depending on context.

In this sentence, it signals possibility, so the idea is something like:

It often appears at the beginning of the sentence, as it does here, to set the tone of uncertainty right away.

Why does the sentence begin with the verb يقرر before صديقي?

Arabic often prefers verb-first word order, especially in neutral statements.

So:

This is completely normal in Modern Standard Arabic.

You could also say:

but that would sound a little more like you are emphasizing my friend.

So the order in your sentence is standard and natural:

Why is يقرر in the present tense if the English meaning sounds future, like might decide?

In Arabic, the present tense often covers both:

The future meaning usually becomes clear from context.