WRF

Expedition WRF weather simulations

Expedition WRF is best thought of as a system to add small scale thermal and land effects to the GFS forecast.

It uses the highest resolution GFS data we can obtain and other surface datasets for initialisation and boundary conditions. The 1/36° domains are similar in horizontal and vertical resolution to the HRRR.

It is aimed at sailing locations where high resolution data isn't available (eg Cape Town and NZ) or is is harder to obtain (eg Australia).

Various areas are also available on demand for regattas, such as the Olympics and western Mediterranean sailing venues.

What it isn't

It isn't a replacement for the national mesoscale models such as Access, Arôme, HIRLAM and HRRR.

It also doesn't replace the global models for larger scale areas. WRF and MPAS can be run on a global scale, but realistically we can't take an interpolated subset of data from a global model, interpolate it to a new grid then run it at lower resolution with fewer levels and expect a comparable outcome.

Data

MSLP, rain, 10m wind and gusts, 20m wind, 2m temperature, CAPE & total cloud cover. Others available on request.

The Expedition interface allows only the wind or basic parameters to be downloaded.

Updated every 6 hours (4x daily), except for NZ where the model is updated every 3 hours. Update times can be checked in Expedition before downloading.

Resolution

1/12° 0.083° (< 5nm), 1 hour increments to 72 hours

1/36° 0.028° (< 2nm), 30 minute increments to 36 hours

1/108° 0.009° (1/2nm), 30 minute increments to 24 hours

Minimum of 45 levels. WRF can be run with 35 or fewer levels, but more is always better.

Areas

1/12° (0.083°) 1/36° (0.028°) 1/108° (0.009°)
New Zealand NZ North Auckland
  Cook Strait  
NZ North Auckland  
NZ Central Bay Of Islands  
NZ South Coromandel   
     
Adelaide Adelaide  
New South Wales Sydney Sydney
Queensland north Hamilton Island Hamilton Island
Queensland south Brisbane  
Perth Perth  
Tasmania Hobart  
  Melbourne  
     
Cook Islands Cook Islands Cook Islands
     
Baleares Baleares Palma
Middle Sea race Middle Sea race  
     
Cape Town Cape Town Cape Town
Caribbean 600 Caribbean 600 Antigua
     
UK South UK South Solent
English Channel Scillies  
Irish Sea Lyme Bay  
  Solent  
  Brighton  
  St Helier  
  Le Havre  
     
On demand    
Italy Capri  
Scarlino Scarlino Scarlino
St Tropez St Tropez St Tropez
Sardinia Sardinia Cagliari
    Porto Cervo
     
Hong Kong Hong Kong  
Kings Cup Kings Cup  
Japan Enoshima Enoshima
Manila Manila