Weather

[Medzell]

If flight simmers for absolutely years now have had real-time world-wide weather available, how come nothing has ever appeared on that front for those of us who like to fly U-boats? The demand would certainly be there I imagine. No more poxy SH weather engines, just REAL weather 24/7

[oscar19681]

How is the weather up there?

[kylania]

Sadly the Weather History & Data Archive (http://www.wunderground.com/history/) starts from 1945.

[ETsd4]

If i have all real weather data from 1939 until 1945
how can i input real weather data into a SH5-campaign ?


a) by editing the campaign itsself?
or
b) outside the campaign (if the weather will change, save, set real weather data, load campaign again)?
or
c) any other method?
or
d) not possible



Sadly the Weather History & Data Archive (http://www.wunderground.com/history/) starts from 1945.
For infos about historical weather data see http://www.subsim.com/radioroom/showthread.php?t=186202

[TheDarkWraith]

If i have all real weather data from 1939 until 1945
how can i input real weather data into a SH5-campaign ?

Interesting question....seeing how my UIs mod lets you change the weather before going out on a historic mission (single mission) I don't see why I couldn't do the same thing with the campaign. It seems to me I could have the mod read a/some files gathering the needed info about the weather for the day of the current campaign and apply it :hmmm:

[ETsd4]

Just uploading all the weather data 1939-1945 the National Climatic Data Center has given me. (ca. 1GB)

Here an example of Apr 1943
The given txt-file is in the "icoads 2.5" format (International Comprehensive Ocean-Atmosphere Data Set (ICOADS) and has several nfos about date, wave height, wind-speed, air pressure, locations, reported ship, etc etc.

Here is the beginning of Apr 1943. The size of Apr-1943-file is 10 MB.

194304 2200 1900 7280 0406 310ALBATROSS0333155 10 10052 4 289 2891 289 278 165 25792245126 1 0 111111371AAA11111AAAA 276 366 99 0 21168720301041943 BOMBAY 04NW 01B 10052 084 084 82
194304 2200 690 7980 0406 310LUCIA 0332255 10 10123 4 300 2831 278 165 29369245126 1 0 1F1111171AAA1111AAAAA 276 366 99 0 21178490301041943 COLOMBO 04SW 01b 10123 086 083
194304010000 5590 -480 0406 310ARCHER 0332935190096 10045 4 89 831 78 165 14154245126 1 0 1F15111111AA1111AAAAA 276 366 99 0 21169200301041943 GREENOCK 01WNW08oq 04 10045 048 047
194304010000 5150 17950 0401 2 917008 0110619009471 10091 0 22 22 22 8 2 165 12319195 1 0 0 2F111131111A1111A1AAA 276 366 99 0 10017008705 - 2172
194304010000 5250-17750 0401 2 951017 01406 46098 2 10210 0 0 0 0 6 50 165 12427195 1 0 0 2F111131111A1111A1AAA 276 366 99 0 1005101702600 - 2170
194304010000 5250-17450 040163 2 922084 03616 0097 3 10244 0 28 6 -31 448 5 165 12424195 1 0 0 K4 21111111111A111111AAA 276 366 99 0 663 06522084032 2170
194304010000 4300 13560 0400 2 250250 80098 0 10231 0 22 12100 04 165 15535732 57 5 0 G6 211111F1111A11AA11AAA 27610 366 99 01019D00F32302060901010101090901010901010009098080 800904800009800909090980808080808000
194304010000 4350 -6250 040166 2 912159 02706 26097 1 0 113 1 00 165 17132195 1 0 0 H4 11F11FF1111AAAAA11AAA 276 366 99 0 666 1215901100272- 1231
194304010000 4850 -5450 0401 2 935009 03406159094 10003 0 -22 -28 -39 -118 2 165 17284195 1 0 0 H8 1111411111AA111111AAA 276 366 99 0 08835009035 - 1238
194304010000 3280 -7990 0406 310ARETHUSA 0332035 26096 10261 4 244 2111 195 156 165 20629245126 1 0 1111111111AA11111AAAA 276 366 99 0 21169323331031943 CHARLESTON 20SSW02bc 06 10261 076 070 60
194304010000 3280 -7990 0406 310NIGERIA 0332035 10 10195 4 194 1891 186 165 20629245126 1 0 1F1111111AAA1111AAAAA 276 366 99 0 21182853431031943 CHARLESTON 20SSW01b 10195 067 066
194304010000 3250 -6550 040166 2 943022 02706 72096 2 10203 0 189 161 144 1786 1 00 165 20725195 1 0 0 F6 11111111114A111111AAA 276 366 99 0 666 0754302202100244- 1162
194304010000 2640 5640 0406 310DAUNTLESS0333615 0097 10161 4 228 2221 219 211 165 21966245126 1 0 1111111111AA11111AAAA 276 366 99 0 21173140201041943 KHOR KUWAI 04C 00bc 08 10161 073 072 70
194304010000 2624 5665 0403 310ALAUNIA 0333615 0 10130 4 211 2001 195 165 21966245126 1 0 1F1111111AAA1111AAAAA 276

Txt-format description here: http://icoads.noaa.gov/e-doc/imma/R2.5-imma_short.pdf

[Sailor Steve]

Does the data exist for every location for every day? The weather in the North Sea and the weather in the South Atlantic were certainly not the same. I love the idea of this, but if the information is incomplete some of it will necessarily be ahistorical.

While modern real-time weather is not the same as what happened seventy years ago it has the advantage of being recorded everywhere at once, and updatable minute-by-minute for any location in the world.

[mobucks]

if i save out at sea, and reload that game, 90% of the time the weather will change drasticly. Seems like a bug, but worth considering, how any changes to weather will be kicked in the pants by this broken game.

(yes im in a mood, my revisit to SH5 has been painful to say the least)

[ETsd4]

Does the data exist for every location for every day?

No, according to the statistics i have here 58 datas for every hour of the day, for every day of the year 1939-1945. Approximately 3.5 million datasets in total.

The weather in the North Sea and the weather in the South Atlantic were certainly not the same.
Thats right. What i have to do is to interpolate the non-existing datasets from old & future data, from datasets of nearby locations, etc. I will go for 1 weather/wave-dataset for every latitude x longitude of the atlantic, north-sea, baltic-sea, Mediterranean, black sea, etc.

[Sailor Steve]

Cool. That's a lot of work, and my hat's off to you. :salute:

My only other concern is that being that precise means the weather might be a little predictable.

[Pintea]

Very nice find...however I doubt it can be modded, only maybe if TDW replaces the weather generation mechanism with his dll injector.

[dcb]

And this brings us to another limitation of the game engine: wind speed being capped at 15 m/s and the engine's inability to emulate the natural behavior of ships in rough seas.

What good will it be if we know there was a monster storm in November 1941, when all we can have is the same moderate swell?:cry:

[Sailor Steve]

And this brings us to another limitation of the game engine: wind speed being capped at 15 m/s and the engine's inability to emulate the natural behavior of ships in rough seas.

What good will it be if we know there was a monster storm in November 1941, when all we can have is the same moderate swell?:cry:
There was a mod for SH3 that doubled the wave height at the same wind speed, and SH3 Commander modified it by season. Could not the same be done for SH5?

[Pintea]

There was a mod for SH3 that doubled the wave height at the same wind speed, and SH3 Commander modified it by season. Could not the same be done for SH5?

It can be done, no problem there. However the ships' physics will look like s**t.

[dcb]

It can be done, no problem there. However the ships' physics will look like s**t.

That's what I was talking about. We can have high waves by a tweak similar to what has been done for SH3, but the sub on rails effect is here to stay:cry:

[ETsd4]

There is a problem with the vast number of 416,2 million weather-datasets i have to generate to cover the Atlantic area in the time period of Sep'39-Mai'45.

The Atlantic with adjacent seas (black-sea, hudson-bay, north-sea, baltic-sea etc.) has an area of 106 Mill Km^2.
If i go for 1 dataset (waveheight/cloudcover/precipitation/windspeed/winddirection/kind of precipitation etc.) of each longitude/latitude for each hour of the Atlantic i have to generate 8500 datasets for 1 hour to cover the whole Atlantic area + adjacent seas. 1 dataset covers an area of 12500 km^2 (= area of 112km x 112 km).

8500 datasets x 24 hours x 30 days x 68 months = 416,2 Mill datasets

I would accept 7.5 million datasets because 7.5 million datas generate a mod-size of ca. 150 MB (one weather-dataset is 20Byte long, and the dataset is already in packed format).
I dont accept a mod-size of 1 GB or so. So my goal is to reduce 416,2 million datasets to max 7.5 million datasets.
Any thoughts?


My only other concern is that being that precise means the weather might be a little predictable.

I see no predictions here other than that you are a meteorologist or an ancient sailor with the ability to predict from realistic past and present weather the weather in the future. This would be no disadvantage but a nice sideeffect of a weather-mod with realistic weather-datas.