<Dd> These are the highest estimated forward speeds of any tropical system (including tropical depressions, tropical storms, and hurricanes) between 1851 and 2017 . This list does not include extratropical systems, which routinely reach very high forward speeds . </Dd> <P> Below are the five largest hurricanes (by gale diameter) ever observed in the Atlantic basin . </P> <Table> Known Atlantic hurricanes with gale diameter of 750 miles <Tr> <Th> Rank </Th> <Th> Storm </Th> <Th> Season </Th> <Th_colspan="2"> Diameter </Th> </Tr> <Tr> <Th> (mi) </Th> <Th> (km) </Th> </Tr> <Tr> <Th> </Th> <Td> Sandy </Td> <Td> 2012 </Td> <Td> 945 </Td> <Td> 1,520 </Td> </Tr> <Tr> <Th> </Th> <Td> Igor </Td> <Td> </Td> <Td> 920 </Td> <Td> 1,480 </Td> </Tr> <Tr> <Th> </Th> <Td> Olga </Td> <Td> </Td> <Td> 865 </Td> <Td> 1,390 </Td> </Tr> <Tr> <Th> </Th> <Td> Lili </Td> <Td> </Td> <Td> 805 </Td> <Td> 1,295 </Td> </Tr> <Tr> <Th> 5 </Th> <Td> Karl </Td> <Td> </Td> <Td> 780 </Td> <Td> 1,255 </Td> </Tr> <Tr> <Th_colspan="5"> Sources: (1) </Th> </Tr> </Table> <Tr> <Th> Rank </Th> <Th> Storm </Th> <Th> Season </Th> <Th_colspan="2"> Diameter </Th> </Tr>

What was the largest hurricane in us history