Fog bound

Last weekend thick fog hung over the city in the early morning and till midday along some stretches of the Ottawa River. My husband, planning to fly his plane to Quebec on Saturday, had to wait patiently until it lifted or shifted enough from the runway at Rockcliffe Airport before he could safely take off ... at lunchtime. On Sunday morning a visibility reading of  0 statute miles was reported at nearby Gatineau Airport; that is very unusual indeed.

OTTAWA/GATINEAU/QC
SPECI CYND 181249Z 00000KT 1/8SM FG VV001 RMK FG8=
SPECI CYND 181230Z 00000KT 1/4SM FG VV001 RMK FG8=
METAR CYND 181200Z 00000KT 0SM FG VV000 01/01 A3018 RMK FG8 SLP222=
METAR CYND 181100Z 00000KT 0SM FG VV000 01/01 A3017 RMK FG8 SLP219=
TAF CYND 181238Z 1813/1901 00000KT 1/4SM FG VV001
BECMG 1813/1814 3SM BR FEW004
FM181500 22006KT P6SM FEW030
RMK NXT FCST BY 181800Z=