I really like not knowing the order of all this shit, there's something of a noir mystery going around on these boards that us detectives are trying to piece together (including me, against my better judgement
). I've been trying to track continuity by the shape her hair is in and her clothing (since it's more telling than anybody else's so far), and by the time she's in the blue jumpsuit and her hair is loosened up, we know something stressful has gone down.
Something interesting to note is that she is wearing the grey suit and with her hair tightly knit in the scene where she says that she "sincerely hopes [they] make it", which is paired with the race against the storm, and she is also shown wearing the suit and the same hairstyle in the briefing scenes; you can very well be right about this being the first trip out. She also tells them that if they're "really going down there, [they're] going to die", leading one to believe that the a previous trip has shown them the risks.