I read that data as showing that the USA has had a sharp excess death event for each of the last four weeks reported. I'm seeing a much greater excess death rate than the official Covid19 reports.

This isn't true, deaths reported lag, so the numbers continue to go up after the week is over.

Looks at the data by state or city. VA shows a huge spike over normal in early April. NY and NYC show even bigger spikes.

And the data is only through April 1. I suspect the excess death rates will be higher nationwide from April 1-May 1.

Where are you seeing "only through April 1" ?

The tables say 2/1/2020 to 5/2/2020 and shows 5 weeks of data for April thru May (the page is updated as-of today, 5/8/2020).