logo
0 0
0 0
4 0
Username:

Password:


Register! (free) Why?

Weather models used by Windguru

GFS model

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 only uses 180 hours of forecast, because beyond this it's more "crystal gazing" then forecast I think :). You see that the model resolution is not that great but it covers the whole Globe!

NAM model

The North American Mesoscale (NAM) is a regional mesoscale model using enhanced terrain and improved parameterization of surface and precipitation processes. It is also run by NCEP, formerly it's name was Eta, but in early 2005 it was renamed to NAM. Windguru uses 84 hour forecast data in 3 hour step which covers Northern America with average resolution of 0.11 degree (about 12 km). Updates four times per day. Much higher resolution than GFS should give more precise short term forecasts. Coverage map:

NAM 12 km
nam 12km

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
nam 3km

WRF model

The Weather Research and Forecasting (WRF) Model is a next-generation mesocale numerical weather prediction system designed to serve both operational forecasting and atmospheric research needs. It is an evolutionary successor to the MM5 model. The effort to develop WRF has been a collaborative partnership, principally among the National Center for Atmospheric Research (NCAR), the National Oceanic and Atmospheric Administration (the National Centers for Environmental Prediction (NCEP) and the Forecast Systems Laboratory (FSL), the Air Force Weather Agency (AFWA), the Naval Research Laboratory, Oklahoma University, and the Federal Aviation Administration (FAA). More info at the WRF model website.

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. The initial and boundary conditions come from GFS. If everything goes smooth WRF updates 4 times per day and produce forecast for 78 hours to the future in 1 hour step. Forecasts include wind speed and direction, wind gusts, temperature, total cloud cover and precipitation.

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:
WRF 27 km WRF 9 km

WRF with 3 km resolution: (Czech rep.)
WRF with 3 km resolution: (Gibraltar)
WRF 3 km WRF 3 km

WRF with 9 km resolution: (Canary)
WRF with 9 km resolution: (Egypt)
WRF 9 km WRF 9 km

WRF with 9 km resolution: (South Africa)
WRF with 12 km resolution: (Argentina)
WRF 9 km WRF 12 km


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:
HRWw HRWe

HRW with 5 km resolution:

HRW with 5 km resolution:
HRW HRW

Current model data:

GFS 50 km (world):25.10.2014 06 UTC
NWW3 (waves):25.10.2014 06 UTC
WRF 27 km (Europe):25.10.2014 06 UTC
WRF 9 km (Europe):25.10.2014 06 UTC
WRF 9 km (Canary):25.10.2014 06 UTC
WRF 9 km (Egypt):25.10.2014 06 UTC
WRF 9 km (South Africa):25.10.2014 06 UTC
WRF 12 km (Argentina):25.10.2014 06 UTC
WRF 3 km (CZ):25.10.2014 06 UTC
WRF 3 km (Gibraltar):25.10.2014 06 UTC
NAM 12 km (N.America):25.10.2014 12 UTC
NAM 3 km (Hawaii):25.10.2014 12 UTC
HRW 5 km (Hawaii):25.10.2014 00 UTC
HRW 5 km (Caribbean):25.10.2014 06 UTC
HRW 4 km (US):25.10.2014 00 UTC

Model update schedule:

model cycle: 00 UTC 06 UTC 12 UTC 18 UTC
GFS 50 km (world)04:55 UTC10:55 UTC16:55 UTC22:55 UTC
NWW3 (waves)04:55 UTC10:55 UTC16:55 UTC22:55 UTC
WRF 27 km (Europe)05:00 UTC11:00 UTC17:00 UTC23:00 UTC
WRF 9 km (Europe)07:40 UTC13:40 UTC19:40 UTC01:40 UTC
WRF 9 km (Canary)08:10 UTC14:10 UTC20:10 UTC02:10 UTC
WRF 9 km (Egypt)07:35 UTC13:35 UTC19:35 UTC01:35 UTC
WRF 9 km (South Africa)06:15 UTC12:15 UTC18:15 UTC00:15 UTC
WRF 12 km (Argentina)08:40 UTC14:40 UTC20:40 UTC02:40 UTC
WRF 3 km (CZ)06:40 UTC12:40 UTC18:40 UTC00:40 UTC
WRF 3 km (Gibraltar)08:20 UTC14:20 UTC20:20 UTC02:20 UTC
NAM 12 km (N.America)03:00 UTC09:00 UTC15:00 UTC21:00 UTC
NAM 3 km (Hawaii)02:15 UTC08:15 UTC14:15 UTC20:15 UTC
HRW 5 km (Hawaii)04:50 UTC 16:50 UTC 
HRW 5 km (Caribbean) 10:50 UTC 22:50 UTC
HRW 4 km (US)05:45 UTC 17:45 UTC 

(Approximate model update times in UTC, current time is 25.10.2014 16:01 UTC)



© 2000 - 2014 www.windguru.cz | Terms and conditions | Help | Contact |