Definition
An ATC authorization permitting a pilot to operate under visual flight rules within controlled airspace at an airport when the weather is below the standard VFR minimums. It requires the pilot to remain clear of clouds and, for fixed-wing aircraft, have at least one statute mile flight visibility. It is issued only on pilot request and only when the requested operation will not delay IFR traffic.
Plain English
Permission from air traffic control to fly visually in or out of an airport's controlled airspace when the weather is too poor for normal visual flying, as long as you can stay clear of clouds and see well enough to fly safely.
Context Anchor
In helicopter point-in-space approaches, a pilot may need a Special VFR clearance to continue visually from the end of the instrument approach to the actual landing site, such as a hospital helipad.
Derivation
"Special" here means an exception to the standard rule. A normal VFR clearance assumes standard weather minimums; a Special VFR clearance is the special-case version that lets you fly visually below those minimums under tighter conditions.
Why Pilots Care
It lets pilots continue a visual flight instead of canceling or switching to instruments when visibility drops just below normal VFR limits.
Intuition Check
“Special” does not mean informal or free from rules. “Clearance” does not mean ATC has decided the weather is safe; it means ATC has authorized the operation under the Special VFR rules, and the pilot remains responsible for flying safely.
Example Sentence 1
With visibility reported at two miles and a 900-foot ceiling, the pilot requested a Special VFR clearance to depart the Class D airspace.
Example Sentence 2
With the special VFR clearance in hand, the helicopter continued visually to the pin waypoint.