Count how many times a value exceeds another value AND has not occured in previous 24 cell

[TRL37]

Hello,

I'm trying to program excel to process raw tidal elevation data. I have hourly tidal elevations over a one year period and I want to know how many times a reading of over 2 feet has occurred. However, I only want to count an exceedance if another exceedance has not occurred in the previous 24 hours. I have a worksheet now with a formula next to every data point which does this, but I was wondering if there is a way to just have one formula that counts it all up in one cell.

I think the formula will involve a CountIf(), And(), and Index() functions. I guess the best way I can think to describe it right now is:

=CountIf(And(cell in column 1>value, ***) with the *** being a function which checks the previous 24 cells in that column to see if an exceedance has occurred.

I can offer more information upon request, but I'm just wondering if this is even possible.

Thanks in advance

[FDibbins]

To best describe or illustrate your problem you would be better off attaching a dummy workbook. The workbook should contain the same structure and some dummy data of the same type as the type you have in your real workbook - so, if a cell contains numbers & letters in this format abc-123 then that should be reflected in the dummy workbook.

To attach a file to your post,
click advanced (next to quick post),
scroll down until you see "manage file",
click that and select "add files" (top right corner).
click "select files" find your file, click "open" click "upload" click 'done" bottom right. click "submit reply"

Once the upload is completed the file name will appear below the input boxes in this window.
You can then close the window to return to the new post screen.

[TRL37]

I've attached a dummy spreadsheet to this reply. There are notes in the file to help.