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About PocketGrib Lite

With PocketGrib Lite GRIB file viewer you can easily download, view and analyse global weather data.

Wind, preciptation, pressure, temperature and wave data extracted from GRIB files are displayed through our simple interface.

The Lite version is limited to downloading and viewing 48 hours of forecast data using the GFS weather model to 1° resolution and 6 hour time step. Upgrade to the full version to get up to 8 days of forecast across the full range of weather models with the highest resolution.

This GRIB viewer is perfect for sailors (both sailing and in the pub), windsurfers, storm chasers, outdoor enthusiasts, amateur and professional meteorologists.

- Choose your map location and have weather information overlaid
- Mapped weather can be animated
- Weather can be viewed as a meteogram (graph) or raw data
- Configurable download to minimise file sizes (great for roaming)
- GRIB files can be downloaded to your PC
- Displays online or offline

PocketGrib downloads and displays the following weather types:
- Wind speed and direction (10 m above mean sea level)
- Precipitation (rain, snow etc)
- Pressure
- Air temperature
- Waves (including Mediterranean and Black Sea)
- Cloud cover
- Relative humidity
- CAPE (Convective Atmospheric Potential Energy)
- Current (Atlantic only)
Direct download of GRIB data from NOAA's GFS (Global Forecast System) model
- Forecasts up to 2 days (full version to 8 days)
- Data steps: 3hr (full version), 6hr, 12hr
- Worldwide Coverage
- Resolution: 0.25° (full version), 0.5° (full version), 1°, 2°
- Data updated 4 times a day (every 6 hours)
The full version also support for COAMPS, WW3, NOGAPS, RTOFS (Currents) and FNMOC WW3 (Mediterranean wave) models.

By downloading only what the user needs it it possible to keep the GRIB files small which makes it especially convenient for low bandwidth regions or when roaming internationally.

GRIB forecasts are published without human intervention or review. Therefore some knowledge and awareness is required by the end user. Most GRIB models do NOT accurately forecast hurricanes and tropical cyclones so their use should be combined with specific hurricane and tropical cyclone forecasts.

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* 6-hour historical Wave height and Energy trend reports
* 7-day hourly harmonic tide forecast
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- Primary and secondary swell height, period, direction
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- Wave energy, period, direction

7-day NOAA WAVEWATCH III Global Wave Model Forecast Includes:
- Hourly swell component predictions (1-6 swells)
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7-day Hourly Harmonic Tide Forecast Includes:
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48-hour Tidal Current Forecast Includes:
- Interactive graph to represent speed of the tide, in knots
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5-day NWS Marine Forecast Includes:
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- Click any point on the map

Sunrise/Sunset Times Includes:
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- Civil Twilight
- Sunrise/Sunset
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- HF Radar Real-time current flow velocity vectors
- HF Radar 12-hour averaged current flow velocity vector
- NEXRAD Composite Base Reflectivity
- NEXRAD Base Reflectivity
- NEXRAD Echo Tops EET
- HRRR Reflectivity Forecasts
- GOES North America, Hawaii and Alaska Visible
- GOES North America, Hawaii and Alaska Infrared
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- 24-Hour Precipitation Forecast
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GIS Mapping System using real-time data from NOAA, including:
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- Long-Duration Hazards
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- Significant Wave Height
- HF Radar Vectors (Surface Currents)
- Total Water Level (Tides + Surge)
- Tidal Water Level
- Water Level Surge
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- Tropical Cyclone Best Track Analysis
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- Wind Gust & Direction
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- 15 minute Lightning Strike Density
- Surface Visibility
- Sea Surface Water Currents (w/ Speed)
- Total Cloud Cover (%)
- Air Temperature
- Sea Surface Temperature
- Relative Humidity
- Dew Point Temperature
- 12-hour rain probability
- 1/3/6/12/24/48/72 Hour Precipitation Accumulation
- GOES Northern Hemisphere Satellite Imagery
- National Grid
- Electronic Nautical Charts (ENC)

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Updated hourly.

I am a sailor this app very use full Thanks
Rasitha Nimantha
Best weather app for offshore sailing. Keeps the data for use when offline and tracks the vessel in real time with the downloaded weather.
Martyn Mj
Love this app, usually pretty accurate easy to use
Dirk Diggler