Where does all the water/snow go over the winter?

Woody007

Active member
Aug 20, 2020
28
Midwest US
In-ground vinyl salt pool.
Safety cover.
It would seem to me that there would be a fair amount of water that makes its way into the pool over the course of the winter in the Midwest.
I start with the water a tad below the arrows on the skimmer, and even with several months worth of snow and rain, the water is barely to the top of the skimmer at opening in May from closing in October.
99% sure there is no overflow, but the deck seems to be nicely pitched away from the pool.
Does it evaporate through the safety cover, or does that cover and the pitch of the decking really keep the water out of the pool?
Just curious on how this works.
 

Texas Splash

Mod Squad
TFP Expert
LifeTime Supporter
Jun 22, 2014
33,620
Texas, San Antonio/Marion, South-Central Area
Pool Size
17888
Surface
Fiberglass
Chlorine
Salt Water Generator
SWG Type
CircuPool RJ-45 Plus
A bit of evaporation is possible. But with solid covers, if you get enough heavy snow or rain, the weight can push down on the water and push some of it out. Any chance that's what you are experiencing?
 

V___25

Gold Supporter
May 30, 2020
237
Central PA
Pool Size
24000
Surface
Vinyl
Chlorine
Liquid Chlorine
Do you have any areas along your coping where the liner meets in that aren't quite secure or have gaps? I have these areas by my steps and if the water would get that high, it would start going in those holes and down behind the pool. Maybe a combination of something gaps, evaporation and run off?
 

Woodstock1234

Gold Supporter
Aug 4, 2020
236
Illinois
Most likely evaporation. Water will evaporate faster in the winter. Plus, snow looks like so much more water than it actually is when it melts. Without the cover, you would have a lot less water in the spring I am sure.
 

Woody007

Active member
Aug 20, 2020
28
Midwest US
A bit of evaporation is possible. But with solid covers, if you get enough heavy snow or rain, the weight can push down on the water and push some of it out. Any chance that's what you are experiencing?
I guess there may be a chance, but I think I would see some water activity around the deck area, which I haven't.
 

Woody007

Active member
Aug 20, 2020
28
Midwest US
Do you have any areas along your coping where the liner meets in that aren't quite secure or have gaps? I have these areas by my steps and if the water would get that high, it would start going in those holes and down behind the pool. Maybe a combination of something gaps, evaporation and run off?
I haven't seen the water get up to the level where it could get behind the liner, at least in the spring it's not.
 
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1Sammy

In The Industry
Jul 20, 2017
438
Windsor, Ontario. Canada
Once closed and all plugs are in place and cover on, mark your water level in the skimmer. With no rain / snow see if the level drops. With rain snow see if the level comes up. You will need to check every 24 / 48 hours.