09-01-2018, 03:38 AM
I don’t think the app was populated with precise info for every location worldwide. At best it offers a general idea within a general area. The locations I checked seemed roughly accurate from my past experience, but it’s certainly not as precise as a Guy Hagi 5 day forecast.
From the bottom of the article/app:
Methodology
For each year, the count of days at or above 90 degrees reflects a 21-year rolling average. Temperature observations for your hometown are averaged over an area of approximately 625 km² (240 square miles), and may not match single weather-station records.*
The time series is based on historical data for 1960-2000. The 2001-2020 period relies on a combination of historical data and future projections.
We do not include locations with fewer than three 90-degree days per year on average throughout the entire time period, or for selected other regions where day-to-day variation in maximum temperature is underestimated by the model.
A more detailed methodology is available from Climate Impact Lab:
http://www.impactlab.org/wp-content/uplo...Method.pdf
* so Hilo could possibly use weather data from Kona or Honolulu, or vice versa
From the bottom of the article/app:
Methodology
For each year, the count of days at or above 90 degrees reflects a 21-year rolling average. Temperature observations for your hometown are averaged over an area of approximately 625 km² (240 square miles), and may not match single weather-station records.*
The time series is based on historical data for 1960-2000. The 2001-2020 period relies on a combination of historical data and future projections.
We do not include locations with fewer than three 90-degree days per year on average throughout the entire time period, or for selected other regions where day-to-day variation in maximum temperature is underestimated by the model.
A more detailed methodology is available from Climate Impact Lab:
http://www.impactlab.org/wp-content/uplo...Method.pdf
* so Hilo could possibly use weather data from Kona or Honolulu, or vice versa
"I'm at that stage in life where I stay out of discussions. Even if you say 1+1=5, you're right - have fun." - Keanu Reeves