Unfortunately Weather Underground on March 22 is discontinuing access to NWS record highs and lows as optionally displayed by this dashboard
$useWU = true; // Use Weather Underground Records for a Site Closest to You.
// Set to true if you have UNDER 2years of data on your station.
// This is based on Weather Underground Records. (Setup WU under View, Wunderground Almanac)
// This no longer has any effect on the New Record HIGH/LOW icon.
in AltAjaxDashboardConfig6.php
The easiest option is to set $useWU = false; although I like having the records for my locale visible.
A more difficult option is to locate a source for these daily records, and scrape it. I found a
University of Nebraska-Lincoln monthly source, and created a scraper to cache the source each day just after midnight and extract the day's data. (Come to think of it, I may only need to cache the source once a month.)
$today: 7, $dayMonth: March
$fileName: https://lincolnweather.unl.edu/records/March-Records.asp
$hopper: 17973, $startgrab: 17972, $finish: 18279
$length: 307
$the_data:
7
80/2016
14/1995,1932
-9/1943
55/2000
0.87/1958
$theHigh: 80, $highDate: 2016, $theLow: -9, $lowDate: 1943
These records are now displayed on
my AltAjaxDashboard.
This is strictly a local solution for me.
However there is a more general source,
Weather Underground (Reload the page if a backend error occurs and you are a WU member. I don't think it works for non-WU members.) that currently displays some locale's historical extremes. Whether or not this data will still be available after March 22nd remains a question. If it's still around it would form the basis for a more general solution to the display of local temperature records in that it could also be scraped of the relevant numbers. Time will tell.