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SwedishModels del temps utilitzats a Windguru
Model GFS
GFS stands for the Global Forecast System. It is run by National Centers for Environmental Prediction (NCEP) which is a unit of NOAA (National Oceanic and Atmospheric Administration), NWS (National Weather Service), USA. The GFS is run four times per day (00 UTC, 06 UTC, 12 UTC, and 18 UTC) out to 384 hours. Since July 2010 it is run with resolution of 27 km out to 192 hours (previously 35 km) and then with lower resolution for up to hour 384. GFS datafiles that are currently available from NOAA have resolution of 0.5 degree (about 50 km) so this is the real resolution of products that you can see here or on other websites that use the same source. Windguru només utilitza 180 hores de previsió perquè mirar més enllà crec que seria més aviat cosa de "endevinació per bola de vidre" que no previsió :). Com podeu veure la resolució del model no és molt bona, però cobreix tot el Globus!
Model NAM
El North American Msoscale (NAM) és un model de mesoescala regional que utilitza terrenys millorats i una parametrització de la superfície i dels processos de precipitació també millorats. També el fan els NCEP, antigament el seu nom era Eta, però a principis del 2005 fou renombrat a NAM. Windguru utilitza les dades de la previsió a 84 hores en salts de 3 hores que cobreix Amèrica del nord amb una resolució mitja d'1.1 graus (uns 12Km). S'actualitza 4 vegades cada dia. D'una resolució més alta que el GFS n'hauria de resultar una previsió més precisa en les prediccions a curt termini. Mapa de cobertura:
NAM 12 km |
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Since October 2011 NOAA/NCEP added several high resolution subdomains to their NAM model. The first we use on windguru is the one that covers Hawaii in 3 km resolution. The subdomains run inside the main 12 km domain from 0 to 60 h, but at the moment we only show the first 36 hour forecast, the reason for this is that for 0-36h the output files are available in 1 hour steps, but 36-60h only in 3 hour steps, and it is not so easy to combine that in the current windguru forecast tables (at least now, it will probably change in future). Updates are 4 times per day.
NAM 3 km |
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Model WRF
El model Weather Research and Forecasting (WRF) is un sistema de predicció del temps numèric de mesoescala dissenyat per a servir tant per a satisfer necessitats de predicció operacional com per a satisfer necessitats de recerca atmosfèrica. És un successor evolucionat del model MM5. L'esforç de desenvolupar WRF ha sigut una associació de col·laboració, principalment entre el National Center for Atmospheric Research (NCAR), la National Oceanic and Atmospheric Administration (els National Centers for Environmental Prediction (NCEP) i el Forecast Systems Laboratory (FSL), l'Air Force Weather Agency (AFWA), el Naval Research Laboratory, Oklahoma University, i la Federal Aviation Administration (FAA). Més informació en el lloc web del WRF.
We are running WRF model for most Europe and Mediterranean. Canary Islands, Madeira and part of Morocco's Atlantic coast are also covered by WRF with 9 km resolution. Another smaller WRF 9 km resolution domain covers Northern Red Sea with popular spots in Egypt, and also Israel, Lebannon and south of Cyprus. Argentina, Chile and Uruguay are covered by WRF 12 km. Les condicions inicials i de frontera venen del GFS. Si tot va bé el WRF s'actualitza 4 vegades al dia i produeix previsions per a fins a 78 hores en el futur en salts d'una hora. Les previsions inclouen la velocitat i direcció del vent, ràfegues, temperatura, nuvolositat total i precipitacions.
The highest resolution model we are running now is 3 km. Such a high resolution requires massive computing so the covered area can't be very large. WRF with 3 km covers Czech republic, forecasts are for next 48 hours and update 4 times per day. Another small 3 km domain covers one of the most famous areas for wind & kitesurfing in Europe - Tarifa / Strait of Gibraltar.
Area covered by WRF with 27 km resolution: |
Area covered by WRF with 9 km resolution: |
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WRF with 3 km resolution: (Czech rep.) |
WRF with 3 km resolution: (Gibraltar) |
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WRF with 9 km resolution: (Canary) |
WRF with 9 km resolution: (Egypt) |
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WRF with 9 km resolution: (South Africa) |
WRF with 12 km resolution: (Argentina) |
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HRW model
The HRW (High Resolution Window) is WRF powered forecast model, it is run by American NOAA/NCEP same like GFS and NAM models described above. We use forecast data which cover Hawaiian islands with 5 km horizontal resolution and United States with 4 km resolution. Forecast length is 48 hours. Forecasts for Hawaii and US east update twice per day (model cycles 00 UTC and 12 UTC) and forecasts for US west update once per day (model cycle 06 UTC). Another smaller HRW 5 km domain covers part of Caribbean around Dominican republic and Puerto Rico and updates twice per day (cycles 06 UTC and 18 UTC).
As you can see on the maps below, the US east and US west domain overlap quite a lot, so if you view forecast for spot somewhere in the central US which is covered by both HRW domains you will always see the latest available model forecast - either from HRWe or HRWw depending on which one is the most up-to-date. So we can say that for central US the HRW model updates 3 times per day (00,06 and 12 UTC cycles)
Notice: Some or all HRW forecasts will not update if NOAA needs to run Hurricane models instead.
HRW forecasts are free to all users!
HRWw with 4 km resolution: |
HRWe with 4 km resolution: |
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HRW with 5 km resolution: |
HRW with 5 km resolution: |
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Dades del model actual:
| GFS 50 km (world): | 25.05.2013 18 UTC |
| NWW3 (waves): | 25.05.2013 18 UTC |
| WRF 27 km (Europe): | 25.05.2013 18 UTC |
| WRF 9 km (Europe): | 25.05.2013 18 UTC |
| WRF 9 km (Canary): | 25.05.2013 18 UTC |
| WRF 9 km (Egypt): | 25.05.2013 18 UTC |
| WRF 9 km (South Africa): | 25.05.2013 18 UTC |
| WRF 12 km (Argentina): | 25.05.2013 18 UTC |
| WRF 3 km (CZ): | 25.05.2013 18 UTC |
| WRF 3 km (Gibraltar): | 25.05.2013 18 UTC |
| NAM 12 km (N.America): | 26.05.2013 00 UTC |
| NAM 3 km (Hawaii): | 26.05.2013 00 UTC |
| HRW 5 km (Hawaii): | 25.05.2013 12 UTC |
| HRW 5 km (Caribbean): | 25.05.2013 18 UTC |
| HRWe 4 km (US east): | 25.05.2013 12 UTC |
| HRWw 4 km (US west): | 25.05.2013 06 UTC |
Següent actualització del model prevista:
| model de cicle: | 00 UTC | 06 UTC | 12 UTC | 18 UTC | |
| GFS 50 km (world) | 04:55 UTC | 10:55 UTC | 16:55 UTC | 22:55 UTC | |
| NWW3 (waves) | 04:55 UTC | 10:55 UTC | 16:55 UTC | 22:55 UTC | |
| WRF 27 km (Europe) | 05:00 UTC | 11:00 UTC | 17:00 UTC | 23:00 UTC | |
| WRF 9 km (Europe) | 07:40 UTC | 13:40 UTC | 19:40 UTC | 01:40 UTC | |
| WRF 9 km (Canary) | 08:10 UTC | 14:10 UTC | 20:10 UTC | 02:10 UTC | |
| WRF 9 km (Egypt) | 07:35 UTC | 13:35 UTC | 19:35 UTC | 01:35 UTC | |
| WRF 9 km (South Africa) | 06:15 UTC | 12:15 UTC | 18:15 UTC | 00:15 UTC | |
| WRF 12 km (Argentina) | 08:40 UTC | 14:40 UTC | 20:40 UTC | 02:40 UTC | |
| WRF 3 km (CZ) | 06:40 UTC | 12:40 UTC | 18:40 UTC | 00:40 UTC | |
| WRF 3 km (Gibraltar) | 08:20 UTC | 14:20 UTC | 20:20 UTC | 02:20 UTC | |
| NAM 12 km (N.America) | 03:00 UTC | 09:00 UTC | 15:00 UTC | 21:00 UTC | |
| NAM 3 km (Hawaii) | 02:15 UTC | 08:15 UTC | 14:15 UTC | 20:15 UTC | |
| HRW 5 km (Hawaii) | 04:50 UTC | 16:50 UTC | |||
| HRW 5 km (Caribbean) | 10:50 UTC | 22:50 UTC | |||
| HRWe 4 km (US east) | 05:35 UTC | 17:35 UTC | |||
| HRWw 4 km (US west) | 11:30 UTC |
(Temps aproximats d'actualització dels models en UTC, l'hora actual és 26.5.2013 03:24 UTC)
