I'm sort of surprised that data from a source like that is used. Have you ever seen the weather data that airline captains use? It looks like this:
KORD 050251Z 26006KT 10SM SCT110 M02/M09 A3019 RMK AO2 SLP232 T10171089 53009
That's the current weather conditions for Chicago O'Hare.
Looks like gibberish to you and me but airline captains know what it means and they know how old the observation is. Captain has ultimate authority on the ship, but also ultimate responsibility. It was his job to know what that weather report meant. And surprising to me if he didn't, since by other accounts he was experienced, organized, and safety-conscious.