We have acquired & installed an air quality sensor as part of our real-time atmospheric telemetry. You can view it’s 10 minute average Air Quality Index (AQI) at marquette.purpleair.com.
Given our proximity to vast tracts of unspoiled wilderness, especially to our north in Canada, we want to be prepared if there are plumes of air from forest fires that invade Marquette similar to NYC/DC this past week!
We are still in the testing phases of this device. Once it appears to be reliable & accurate we may publish the AQI reading in the “Weather Conditions” section of the home page (CITY).
UPDATE 06/12/23 10:30 PM:
Air Quality readings are now available on our home page! I have included range information (0-500) for this reading and a couple others too. You can now click on any header in the Weather Conditions section and it will give you a “tooltip” explaining that measurement. I see this as a great way to educate visitors and enhance engagement with the site.
Perhaps you’ve noticed the field “Monthly Departure” in the Almanac on the City page (home page)? Its value represents the current aberration from the 30-year normal average temperature for the calendar month.
Previously, this field was being calculated on a month-to-date basis. That meant that if, for example, only 2 days had passed in the month, and those first two days were very hot or very cold, then the departure value would be quite large (either negatively or positively).
As of today we are calculating the departure as a full month preloaded with normal average temperatures. We replace each day’s normal average temperature with an observed daily average temperature as it occurs. This results in much smaller departures earlier in the month.
We feel this updated methodology is a more accurate representation of reality where trends emerge gradually. Climate, by definition, is the general tendency of observed phenomena — in this case temperatures — to occur within certain boundaries over a long-term period. A few days, or even a week, does not determine the outcome of an entire month.
So, to demonstrate…. The first 4.5 days of June 2023 have been unseasonably warm and yet have only resulted in a +1.4° departure (which rounds down to +1°) for the month. We are no longer assuming there will not be 25 days to come. Instead, we put in normals for those remaining days and witness how much our recent weather skews the entire month.
A couple hundred lines of code have gone into this single field (“Monthly Departure”) in the Almanac. This is the sort of thing that sets this website apart from other weather sources.
Well, the Dark Sky radar widget on the home page has finally gone… dark. As part of Apple’s buyout of Dark Sky all their web maps have been disabled. I’m thinking it happened the 1st of the year (not exactly sure, though).
As such, I have removed that feature from the City (home) page.
The good news is that we have a fully-functioning Maps page with a large, multi-functional, interactive map provided courtesy of Windy. You can view up to the last 12 hours of radar history to see the progression of any precipitation.
The pre-Christmas winter weather event began with two days of moderate snow & relatively calm winds (12/21-22). We were under a “Winter Weather Advisory” during the front side of the area of low pressure. Once the center of the low passed to our south, winds flipped to the northwest, and the blizzard warning began (1 AM 12/23) which lasted until 1 AM 12/25.
While our maximum wind gust of 38 mph on 12/23 was nowhere near a record for our station, that day ended as the windiest day in station history (7.5 years in service) based on sustained winds. The following day was our 4th windiest.
Continue reading “The Great Pre-Christmas Blizzard of ’22”
Updated: Tuesday 12/20/22 11:25 AM
Expect high winds & significant snowfall in the days leading up to Christmas (Fri/Sat).
It’s still too early to discuss exact amounts of snow or top wind speeds. Have the shovels, snowblowers and/or generators ready though.
Decent snowfall likely late Wednesday & throughout Thursday before main event on Fri/Sat.
As of 11:25 AM Tuesday, max winds should occur Friday afternoon thru early Saturday morning. If power should fail, buildings without a backup source of power or heat will cool quickly as temperatures slide into the teens or colder.
Continue reading “Spoiler: Christmas Will Be White & Windy”