If someone davens neitz on Shmini Etzeres and ends up davening with his minyan Musaf quite early. When his wife davens shachris it is then already after her husband davened musaf. Should she say “mashiv haruach u’morid hageshem” already now when she davens shachris? (Perhaps she is nigrer acher her husband in this regard?)
This is an interesting question.
In principle, even if a woman davens Shacharis after her husband has davened Mussaf, she should not say mashiv ha-ruach. However, if she (and her husband) have a fixed local shul, she should ensure that she says morid ha-tal in her Shacharis prayer (even in chutz la-aretz, where the general custom is not to do so).
Poskim discuss whether or not a person follows his local shul with regard to the recitation of mashiv ha-ruach u-morid ha-geshem, even if he has not yet davened Shacharis.
The Biur Halachah (114, s.v. lo yakdim) explains that where there are two minyanim in a shul, and the first has completed Mussaf before the second has began to daven Shacharis, the second should mention morid ha-tal in Shacharis.
The Biur Halachah adds that even if we say that a second minyan is drawn after the first minyan for purposes of reciting mashiv ha-ruach in the Mussaf prayer (there are opinions that mashiv ha-ruach is recited by the congregation only from the Minchah prayer and on), in the Shacharis prayer mashiv ha-ruach is never recited.
The implication is that this is true even for an individual, who will also not be drawn after his shul for purposes of mashiv ha-ruach in the Shacharis prayer.
However, this ruling is not simple, and a number of authorities write that an individual must follow his local shul, and recite mashiv ha-ruach even in shacharis, if he davens after the local shul has already begun Mussaf (and mashiv ha-ruach has been declared). See in this regard Orchos Chaim (Spinka); Shut Toras Yekusiel, Orach Chaim 37; She’arim Ha-metzuyanim Behalachah 19.
The Tehilla Le-David also assumes this to be the principle halachah, but adds that because one fulfills one’s obligations both ways by mentioning “morid ha-tal,” it is better under these circumstances to say morid ha-tal and not mashiv ha-ruach, to ensure that one fulfills the obligation of prayer either way.
The debate above concerns being drawn after the local shul. It stands to reason that a wife is not drawn in this respect after her husband, as Rav Moshe Feinstein writes (in principle) with regard to accepting Shabbos.