MVFR (Marginal Visual Flight Rules)

A flight category indicating conditions that are above IFR minimums but below ideal VFR conditions. MVFR is defined as a ceiling between 1,000 and 3,000 feet AGL and/or visibility between 3 and 5 statute miles. On aviation weather displays, MVFR is shown in blue. Student pilots and low-time VFR pilots should treat MVFR conditions with extra caution as they can deteriorate into IFR quickly.