Definition
An ATC authorization that allows a pilot to operate under visual flight rules within Class B, C, D, or E surface area airspace when the weather is below the basic VFR minimums normally required there. SVFR requires that the pilot remain clear of clouds and have at least 1 statute mile of flight visibility. At night, SVFR for airplanes additionally requires the pilot to be instrument rated and the aircraft to be instrument equipped; helicopters are exempt from these night restrictions and may operate SVFR at night without an instrument rating. SVFR is granted only on pilot request and on a workload-permitting basis from ATC.
Plain English
A special clearance from air traffic control that lets you fly visually into or out of an airport's controlled airspace when the weather is too poor for normal VFR flight, as long as you can stay clear of clouds and see at least one mile.
Context Anchor
You will see SVFR in helicopter VFR weather minimum discussions, especially when entering or leaving controlled airport airspace in marginal weather.
Derivation
"Special" indicates this is an exception to standard rules — granted case by case rather than available by default. The word flags that the pilot is asking ATC for permission to operate visually under conditions that would otherwise prohibit VFR.
Why Pilots Care
It lets helicopter operations continue safely instead of forcing an immediate switch to IFR or cancellation when weather is marginally below VFR minima.
Intuition Check
“Special” does not mean you can ignore the weather rules anywhere you choose. It means a specific ATC clearance allows a limited VFR operation in specific controlled airport airspace under specific conditions.
Example Sentence 1
With the ceiling reported at 800 feet, the helicopter pilot requested SVFR from the tower to depart the Class D surface area.
Example Sentence 2
Under SVFR the helicopter stayed clear of clouds while crossing the control zone at 800 feet.