The extraordinary meeting at NATO headquarters was requested by Turkey under Article 4 of the treaty that founded the US-led alliance, which empowers its 28 member states to seek such consultations when they consider their "territorial integrity, political independence or security" to be in jeopardy.
It comes as Turkey's security situation "has deteriorated dramatically," Bruno Lete, senior officer for foreign and security policy at the German Marshall Fund, a Brussels think tank, said.
NATO Secretary-General Jens Stoltenberg, who will chair the closed-door session, said Turkey requested it following recent "heinous terrorist attacks," which included an IS suicide bombing near Turkey's border with Syria that left 32 people dead and an IS attack on Turkish forces, which killed a soldier.
"NATO allies follow developments very closely and stand in solidarity with Turkey," Stoltenberg said in announcing tomorrow's meeting of the alliance's main political decision-making body, the North Atlantic Council.
Most recently, NATO ambassadors convened in March 2014 at Poland's request following Russia's annexation of Crimea from Ukraine.
After months of reluctance, Turkish warplanes last week started striking militant targets in Syria and entered a long-awaited agreement which allows the US to launch its own strikes from Turkey's strategically located Incirlik Air Base.