Hurricane Gustav captured by Envisat’s Medium Resolution Imaging Spectrometer (MERIS) instrument on 1 September 2008. Gustav formed on 25 August 2008 some 400 km southeast of Port-au-Prince, Haiti. By 31 August Hurricane Gustav had entered the Gulf of Mexico and made landfall in Louisiana on 1 September as a Category 2 hurricane with winds close to 177 km an hour.