https://waterdata.usgs.gov/usa/nwis/uv?site_no=02168500
Check to DO difference on the charts. Although The bottom reading could be in 160 foot of water I’m not sure.
I think you are right about it only being available for Android devices. I can’t find that app for my iPhone.
Heard on the news, that Columbia and surrounding areas could see 6-12" of rain from the storm.