CheckWX is a tool to help pilots better visualize weather data.  It is not intended as a substitute for an official pre-flight weather briefing.

12:58:11 UTC

S74 SIGMET
Lost Isle Seaplane Base
Stockton, California, USA
Convective SIGMET
Valid From
Jun-16 @ 11:55 UTC

Valid To
Jun-16 @ 13:55 UTC

Hazard
Convective

WSUS33 KKCI 161155 SIGW CONVECTIVE SIGMET...NONE OUTLOOK VALID 161355-161755 TS ARE NOT EXPD.