Dr Masters introduced a new "counter" database - one that, as it's stated:
"...The Record Extremes page will give you the option to see U.S. and international records on a map and table. You can select any combination of record types at once, which, combined with the map, provides a interesting visual way to investigate record-setting events. The product uses data from three sources: (1) NOAA's National Climate Data Center, (2) Wunderground's U.S. records, and (3) Wunderground's International records..."
So let's do the first "counter" listing.
Using the data source as the NCDC Records (U.S. only), setting the date range from Jan 1 1890 to current, and selecting just 2 metrics, here's the result:
All time highs: 499
All time lows: 494
Seems well distributed. But one problem is going to pop up real quickly - it limits the answer to 500 only.
Let the counting begin...