There's a good chance you'll wash away if you step outside this weekend. But if you do manage to make it to a subway stop, note that there are a couple changes, especially on Monday for the West Indian Day Parade. Here's what's up:

All 2, 3 and 4 trains will skip Eastern Pkwy-Brooklyn Museum from noon to 7 p.m. on Monday.

2 trains will operate in two sections, from Flatbush Av-Brooklyn College and E 180 St and then along the 5 line to/from Eastchester-Dyre Av; and from E 180 St to Wakefield-241 St; this change is in effect from 3:45 a.m. Saturday to 10 p.m. Sunday. Also during this period, trains will run express from Wakefield-241 St to E 180 St on the E 180 St-bound track. Flatbush Av-Brooklyn College-bound 2 trains will skip Jackson Av from 4:45 a.m. to 10 a.m. on Sunday, and all trains will skip Church Av in both directions from 2 a.m. to 4 a.m. on Monday.

3 trains will run to and from New Lots Av from 11:45 p.m. Friday to 5 a.m. Sunday.

4 trains will not run at all between New Lots Av/Utica Av and Bowling Green from 11:45 p.m. Friday to 5 a.m. Sunday. Trains will operate between New Lots Av/Utica Av and Bowling Green during this period. Manhattan-bound trains will make express stops from Burnside Av to 149 St-Grand Concourse from 6:45 a.m. to 7 p.m. on Saturday, and again from 10:45 a.m. to 7 p.m. on Sunday. Trains will run local in both directions in Brooklyn from 10 a.m. to 7 p.m. on Monday.

5 shuttle service will be replaced by the 2 train from 3:45 a.m. to 7:30 a.m. on Saturday and again from 9:45 p.m. Saturday to 9:30 a.m. Sunday. Trains will not run between Eastchester-Dyre Av and 149 St-Grand Concourse in either direction from 7:45 a.m. to 10 a.m. on Sunday.

Inwood-207 St-bound A trains will make express stops from Canal St to 59 St-Columbus Circle from 11:45 p.m. Friday to 6:30 a.m. Sunday, and then again from 11:45 p.m. Sunday to 5 a.m. Monday. Downtown A trains will make local stops between 125 St and 59 St-Columbus Circle, with that change in effect from 12:01 a.m. Saturday to 5 a.m. Monday.

168 St-bound C trains will make express stops from Canal St to 59 St-Columbus Circle from 6:30 a.m to 11 p.m. Saturday and Sunday.

Downtown D trains will make local stops from 125 St to 59 St-Columbus Circle from 12:01 a.m. Saturday to 5 a.m. Monday.

All E trains will reroute along the F line between 21 St-Queensbridge and 2 Av from 11:45 p.m. Friday to 5 a.m. Tuesday. All trains are suspended between World Trade Center and W 4 St-Wash Sq from 11:45 p.m. Friday to 7 a.m. Monday.

Manhattan-bound Q trains will run express from Kings Hwy to Prospect Park from 11:45 p.m. Friday to 5 a.m. Tuesday.

R trains will run to and from the Jamaica-179 St F station, with that change in effect from 6:30 a.m. to midnight from Saturday to Monday. During that period, Manhattan-bound R trains will run express from Forest Hills-71 Av to Queens Plaza.