Listing of GRIB and other objective forecasts

Updated Deceber 2020

About this page

A list of many GRIB and similar services, whether received by email, FTP (File Transfer Protocol) directly downloading to a PC or tablet or on a web browser.

This page will help users to decide which is best for them. I am trying to keep up to date with the many services that are becoming available and the page will never be up to date, but it will be a start for many,


Related pages


List of Services

This is a listing of GRIB and similar services. Most large area forecasts are taken directly from the US NOAA GFS (Global Forecast System.) Alternatives are the CMC GEM (Canadian Global Environmental Model), the US Navy NAVGEM, the French ARPEGE and the German (DWD) ICON. The two leading models, ECMWF (European Centre for Medium-range Weather Forecasts) and the UK UM (Unified model) have, until recently, only been available in GRIB form on repayment. A limited amount of data are now available from PredictWind. ECMWF forecasts can also be seen free on the Windy.com website and app. They can be seen in chart form on the ECMWF Chart catalogue.

There is now Spire a model of unknown provenance run by Spire, a firm that has launched a constellation of micro satellites to measure radio occultation from Global Navigation Satellites.

ECMWF and the UK UM run global models on grid of about 9 km and 10 or 11 km. Like most other models, the GFS uses a grid spacing of about 13 km, 0.125 degree but provides GRIB data on a 0.25 degree grid, about 25 km. It has to be remembered that the effective resolution of any model is about 4 or 5 grid lengths. Some GRIB viewers interpolate between model grids so giving a false impression of resolution.


Forecasts on finer scales are referred to as “Meso-scale” or “LAM” (Limited Area.Models.) These include:

  • COAMPS – a US Navy weather LAM.
  • WRF – a US Weather Research and Forecast Model used by several "non-official" groups, Usually about 12 km WRF is a successor to the ETA model.
  • OpenSkiron is a University of Athens model based on the ETA but using a 0.05 degree (~5 km) grid. Mediterranan only.
  • OpenWRF Provides WRF forecasts on a 4km and 12km grid, Mediterranan and E Aylantic.
  • HIRLAM – used by several European countries. Resolution down to about 2 km.
  • UK4 covers from mid-Atlantic to the Urals on a 4 km grid. UKV, a British Isles 1.5 km model.
  • ALADDIN. A Météo France model
  • AROME. A Météo France limited area model
  • HARMONIE. Similar to HIRLAM. Developed in association with AROME.
  • ICON' (EU). Icosahedral Non-hydrostatic model. A DWD regional version of their global with a global grid of about 7 km.
  • COSMO (DE) . A national scale version of ICON.
  • NEMS NOAA Environmental Modelling System. Similar to the UK Unified Model. First used operationally for LAM use such as the North American Model – NAM or HRRR.

There are many more.

Service

Free?

Notes

Models

Email GRIB services

Elsewhere on this site general GRIB information and GRIB viewers

Saildocs

Or on my Saildocs page

Y

Very flexible, many elements. Repeat request facility. Needs careful formatting.


GFS
COAMPS

MailASail

Y

Easier to use but less facilities.

GFS

File Transfer Protocol – direct download to a PC and/or a tablet. Some available vi email also.

Global views with winds in streamline form. Not very easy to use for sailing decisions but a great to view large scale weather. Given the size of a global data set, it is not clear what is the resolution of the downloaded data.

Windy.com

Y



“Flat earth” view letting you move over the entire earth.

GFS, ECMWF (Both to 10 days), ICON-EU (to 5 days.)

Ventusky
Best as a Tablet app

GFS & GEM 10 days. ICON 8 days. LAMs ICOn-EU 60 hours days. COSMO-DE 36 hours, US HRRR

MeteoEarth

Y/N

Realistic view on a globe that can be spun to any location. Great for seeing the Roaring Forties,

ECMWF (to 2 days) free. 10 days on prepayment

Selected or pre-selected areas

XyGrib
A fork of zyGrib
with many more options.

Y

Many elements.

GFS 10 days, ICON 8 days, ARPEGE 4 days, ICON-EU, NAM (USA, Caribbean, Hawaii), ARPEGE-EU, AROME 0.025

PredictWind

Y/N

Several elements including currents. Limited free version. Also Weather routing.

GFS, ECMWF, UK UM, PredictWind (CSIRO), Spire. HRRR, NAM, AROME

Squid

Y/N

Several elements including currents. Limited free version. Also Weather routing.

GFS. Several LAMs,

Open Skironl
Includes
Open WRF
ICON-EU
COSMO-DE
All pre-selected areas and parameters
See NOTE below





Y

Mediterranean and Black Sea.

University of Athens (ETA) model 10 km

Mediterranean round to British Isles.

WRF 4 and 12 km res

European waters

DWD ICON-EU 7 km

Dover Strait to Bornholm.

COSMO-DE 2.5 km

YR.NO

Y

Norwegian Met service Meso-scale. Northern N Sea and Scandinavia.

HIRLAM. Wind and currents.

KNMI Mesoscale

Y

Eight areas Ijsselmeer to Dover, two day forecasts, several elements or wind only..

HARMONIE 2.5 km

For these last six URLs can be used to get data via Saildocs email, maybe rather large file.

WeatherTrack

Y

Many elements, several wave models. Many extra “non-GRIB” facilities. Currents as optional extra.

GFS
COAMPS

Weather4D

Y

Many elements, Optional email facility

GFS

PocaketGrib

Y

Many elements, Good chart projections

GFS
COAMPS

iGrib

Y

Fairly basic. Most intuitive. Good chart display


GFS

Many elements,

SailGrib

Y

Many elements including currents. Two day version is free. Also Weather routing.

iNavX

N

This navigation app generates an email request to Saildocs.

GFS

WindFindeer
See NOTE below

Y

Several elements, Limited area forecasts not ,not everywhere in Europe

WRF

Chartplotters

B&G Deckman

Y

Several elements,

GFS

Maxsea

Y

Several elements,

GFS

Browser services for preselected areas - Resolution 10 – 25 km

PasssageWeather

Y

Several elements,

GFS
COANPS
WRF

XCWeather

Y

Few elements, Areas not particularly useful for sailing. Good source of actual. Limited coverage

GFS

WeatherOnline

Y

Many elements,

Several

The following all from Meteociel.fr

MétéoFrance

Y



Individual countries, Atlantic, Europe. Many elements Up to 4 days Many elements. Resolution 1.3 km for AROME, 4-8 km generally otherwise.



AroME ARPEGE HIRLAM WRF

UK

Germany – S Baltic

Spain – Western Med

Italy – Central Med.

Browser Services, mainly Limited area models, < 10km res., 3-days - National Weather Services

Iceland

Y

Wind and pressure only



HIRLAM or HARMONIE

Norway using a browser

Y

Several elemens, sea state and currents

Norway – Grib files for Norwegian coastal regions

Y

Wind, sea state and currents/

Denmark
Scroll down to forecast weather with menu

Y

Wind, swell, sea temperature, currents

Denmark (English)

Y

Wind, sea state, temperature. Currents

Sweden

Y

Few elements

Estonia

Y

Wind, rain, temperature.

Poland

Y

Many elements

UK 4km, 1-5km. WRF

Ireland

Y

Waves only

HIRLAM

Jersey Met Office

Y

Wind and wave for E Channel, Channel Isles, Bay of St Malo

UK Met Office 4km

France via Meteociel.fr

Y

Several elements. Seven coubtries.

AROME, 2,5 km grid

Germany via Meteociel.fr

Y

Several elements. Seven cpuntries

ICON-EU, 7km grid

Spain

Y

Wind and sea state

HIRLAM

LaMMA, Tuscany)

Y

Wind and sea state

WRF

Croatia

Y

Wind and sea state

Akaddin

Greece

Y

Wind and sea state

??

Turk-Marine Weatherwise

Y

Few elements, Mediterranean and Black Sea. And meteograms

WRF 13.5 km grid. Uses ECMWF 0.125 degree data input

Other services of limited area forecasts

Meteoconsult

Y


As far as is known, none of these models starts with a detailed analysis on the grid used.

See NOTE below

Probaly WRF

Poseidon

Y


WRF

Athens University

Y

Predictwind.com,

N

A CSIRO model

Squid

N

Many National Met service models including GFS, ECMWF, HIRLAM, AROME, ARPEGE, GEM, NAM, WW3. Most will start with good data analyses.


ECMWF

A service that doe not fit easily into any of the above ia ECMWF Available on a browser, this shows many outputs from the centre. Many are not useful to sailors. Ten-day forecasts of surface weather abd sea state, rainfall, cloud cover are useful for a good overall view. Tapping on didplays brings up ensemble data showing how much output can vary depending on initial dta analysis.

NOTE

Limited area/meso-scale forecasts

National weather service limited area models start with detailed data analyses to produce detailed short period forecasts. This requires access to and the ability to process masses of data from space and terrestrial based observing systems. As far as I am aware, no other producer of Numerical Weather Prediction Model output (GRIBs) has the ability to do so. Although their models can handle topographic effects well their forecasts will suffer by lack of detailed meteorological data.


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