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Comment by rsync | Hacker News Reader

I'm curious - and perhaps you can help ...

I hate wunderground - it is a giant, bloated mess of a website with a UI that jumps all over the place ...

However, I can't find anyone else to give me a 10 day forecast. It seems like wunderground is the only place that collates it like that, which I like very much.

Am I wrong ? Is there some other source for a proper, detailed, 10 day forecast ?

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I just use https://www.weather.gov/ because its not bloated. Unfortunately it doesn't have 10 day forecasts and I believe the reason they don't show 10 day forecasts is because they are not very accurate. That far out your better off looking at forecast ensembles and looking at what the Euro, Canadian, as well as the GFS model is forecasting. But no common, free weather websites I'm aware of exposes that info. If you live in the west you can use this site to a degree[1], although its more targeted to snow/ski forecasting.

[1]: http://weather.utah.edu/

Is it really difficult to find 10 day forecast? Windy is a particularly good app for these kinds of things.

I also run a small REST API service (oikolab.com) that provides location-based forecast data out to 10 days using NCEP service. I started out using DarkSky and Wunderground a couple of years ago but couldn't really get the type & quality of data I needed so I ended up creating one from the original raw data.

It is a 're-packager' in a sense but what we bring to the table is the ability to query the data in a time-series manner efficiently for specific set of end-users. The way NCEP's GRIB data is packaged makes it very slow and painful to do this if you wanted weather parameters to feed into other analytical models (e.g. building energy simulation, time-series forecast etc).

Im in the same boat, their site performance has seem to just been getting worse over time and it is barely even functional on my phone, however I don't know of anyone else that condenses almost the entirety of a highly detailed 7+ day weather report into such a small and useful little graph with every detail you would want. What would take multiple pages worth of reporting is covered in a small graph the size of my hand.

It was invaluable when I did outdoor work, everyone else was making guesses and extrapolations based on the shitty reports from different local news stations and radar and satellite maps, meanwhile I could tell exactly when a big storm would role through and if rain would be spotty or temperature swings with just a glance for multiple days ahead.

AKA a meteogram.

Look for an app which lets you download GRIB files. PocketGrib and LuckGrib are a couple to try. You can download GFS data (produced by NOAA) for the area/timescale/data you are interested in, drop a cursor anywhere on the map and view a meteogram.

This is the same data used by "value add" weather forecasting sites and services to produce their forecasts.

Accuweather will give you a 3 month forecast! I had to blink a few times to make sure I got that right. Their existing long term forecast goes to March 10, 2021.

https://www.accuweather.com/en/us/boston/02108/march-weather...

Dark Sky (whose future is in question due to the Apple acquisition) has a Time Machine feature that lets you see weather pretty much arbitrarily far in the future: https://darksky.net/details/40.7127,-74.0059/2020-12-31/us12...

I have a degree in meteorology. I can forecast weather for the 4th of July over next 3 years (2021, 2022, and 2023). here in Chicago, Illinois.

will be upper 80s, low 90s. Chance of thunderstorms in afternoon.

Congrats, i have now predicted a typical 4th of July and will be correct more than normal. Damn i should have built a web company and sold my ideas for a bajillion dollars

I'm not saying it's accurate :)

But I still appreciate that the Dark Sky feature isn't artificially limited to a particular date. They have a nice error bar on the temperature that gives you an indication of how much it's unknown.

Joke's on you, I can do that without a degree in meteorology!

It's worth being aware of its shortcomings, as even its 25 day forecast has been shown to be no more accurate than climatological averages.[1] They also have done some shifty stuff in the past regarding data privacy, among some other weird things.[2]

[1]: https://www.washingtonpost.com/news/capital-weather-gang/wp/... [2]: https://en.wikipedia.org/wiki/AccuWeather#Criticisms

Silly Accuweather, I've heard meteorologist refer to anything beyond 10 days as "fantasyland", because forecast that far out are not really accurate.

I'll give you a 10 year forecast!

Do you want it?

Spire Global does a 10 day forecast.

https://developers.wx.spire.com/docs/weather-api/1/overview

Weather gov provides a ton of extended forecasts.

https://www.weather.gov/cae/FireWxextended.html

The NWS directly works well for me. Just type in the location in the upper left. I kind of appreciate the simplicity of their website.

https://forecast.weather.gov/

Could you be a bit more specific and demonstrate how to get a 10-day forecast out of that URL?

There is a text box in the top left which says "Local forecast by "City, St" or Zip Code". Enter your city, state, or zip code in that box and select the location. Then it opens the forecast page. I have included a link to San Francisco below. You get a full 10 day forecast. I'm not sure what else you want.

https://forecast.weather.gov/MapClick.php?lat=37.7771&lon=-1...

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