2 hours

Similarly, what is the difference between Sigmet and convective Sigmet? Convective SIGMETs are for thunderstorms. SIGMETs last for 2 hours, so you may have to wait the weather out for 2 hours at a time. Like AIRMETs, SIGMETs are issued for either actual or forecasted weather conditions. “Outlook” SIGMETs are just that: a prediction.

Simply so, how often are AIRMETs and SIGMETs issued?

AIRMETs are routinely issued for six-hour periods beginning at 0145Z during Daylight Saving Time and at 0245Z during Standard Time. AIRMETS are also amended as necessary due to changing weather conditions or issuance/cancellation of a SIGMET.

Can you fly in a convective Sigmet?

Great question, and the short answer is yes, you absolutely can legally fly through a convective SIGMET… unless your specific operating/military regulations prohibit it.