Sorry you have it backwards...you subtract 7 hours from UTC to get local Vancouver, BC local time...or Add 7 hours to local time to get UTC on October 23rd..
This is nice except this weather is only up to 1100Z time on the 23rd...that is 0400 Local time in Vancouver,BC and not and indication of what the weather might be like at 1800 Local...if you have more or the location you found this please post...