1 2 3 Three Hail teams successfully being posted in RMT in less than a week, plus Hail (I believe it's Ox's) that constantly appears in tournaments.
So, if anyone wants to elaborate on why Hail is so consistent, or disagree, I'm curious as I'm not following the metagame as intensely after the survey.
Not the best player out there, but from seeing SPL, Ladder, Charity Bowl, and my run in OST hail is just a threat. Hail is almost impossible to switch into with arctozolt's amazing stabs alongside the 6% chip from hail to everything but clef and weave and not to mention alolan ninetales being one of the best support mons in OU with Veil, Hypnosis, Encore, Hail, Pain Split etc.
While i thank you for giving
my Team a shoutout, i dont think it should be considered as Hail (just like how Hippowdon + Stall isnt Sand), it should just be considered as Veil HO which has different partners, ways to win, and others. If you choose to include it as hail however, it is another strenght of Hail in enabling to play a very fast paced HO team while having massive bulk due to veil.
So, how hail works is
Hail plays well with 3 strats, HO Weather, Pivot Spam and BO or a combination of the 3. Hail in its core is Offense, you want to have hail up at all times to make sure arctozolt can break the opposing team for your other teammates to clean, or in reverse, have your team soften up the defensive core and beat/wall the scarfers to give arctozolt a clean 6 turn to click moves and win. here ill give a few example of teams i see on the high ladder with hail (1800-2000 ELO).
1.






2.






3.







4.






5.






6.





at first glance, all of them have one thing in common which is pivot spam. pivotting in hail is incredibly crucial to get in the almost unwallable arctozolt to start spamming its move and dealing massive damage. it can be done with common pivots like

torn and

corv, or with a more creative approach in


Eject Pex in team 2 or

Yawn Pert in team 6.
Another thing is, hail is either used to break the opponents team apart so that your slush rush sweeper can sweep in the end (team 2 with

specs ice cream, 5 with

specs volcanion, 6 with

band pult and

zone) , or have your slush rush sweeper break the opponents team for your teammates to sweep in the end (team 1 with

cm hatt, team 3 with


Set up sweeper spam, team 4 with

blaziken).
So why is it good?
It is good because of the offensive pressure of a good hail team can bring to the table can overwhelm your opponent very quickly, as a hail team you need to make sure to not let your opponent rest and always be on their backfoot, you do this by gaining momentum using pivot spam to always be on front and also have heavy offensive pressure that can either beat hail counters (team 4, team 6) or double down on it and make the counter unable to wall everything (team 2, team 5) making it so that the opponent have to double around potential ohko's in half of the turns in a game. hail is also not easy to break due to Aurora Veil and



All of the slush rusher having respectable bulk while usually being paired with tanky pivots and regen-mons. All of these combined can make a playstyle that is hell to defeat.
there are obvious weakness like stacking stealth rock weakness while having arguably the worst defensive typings, having your weather abuser being outsped by any scarfers (even landorus), the reliance on having hail up at all time and can be easily walled if the opponent knows how to pivot around resists can be detrimental, BUT the strenghts overall and the consistency of it makes hail very good and potentially being the best weather.
So thats about what makes hail an amazing pick, i may scour some replays to put here for some proof of why hail is great.
i hope this answers your question
also LudwigFrog explain yourself on post above (jk)