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DEFAULTS
Region
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Home Lon
MODEL GFS
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GFS 0.25° Global ?
GEFS 0.5° Global ?
ECMWF HRES 0.1° Global ?
ECMWF ENS 0.2° Global ?
ARPEGE 0.1° Europe ?
HIRLAM NEW 0.1° Europe ?
AROME 0.01° W Europe ?
HARMONIE NEW 2.5km Benelux ?
NAM-NEST 3km USA ?
HRRR 3km USA ?
REGION CHART
Terms of Use
GFS - Global Forecast System
- Issuing body - NOAA, USA
- Outputs on 0.25° x 0.25° global lat/lon grid
- Run 4 x daily at 00/06/12/18 UTC
- Data available out to 384 hours / 16 days
GEFS - Global Ensemble Forecast System
- Issuing body - NOAA, USA
- Outputs on 0.5° x 0.5° global lat/lon grid
- 20 ensemble members plus 1 control member
- Run 4 x daily at 00/06/12/18 UTC
- Data available out to 384 hours / 16 days
ECMWF HRES - High resolution Model
- Issuing body - ECMWF, Europe
- Outputs on 0.1° x 0.1° global lat/lon grid
- Run 2 x daily at 00/12 UTC
- Data available out to 240 hours / 10 days - NB Only WMO essential timesteps and variables available on wxcharts.eu at this time
ECMWF ENS - Ensemble forecast model
- Issuing body - ECMWF, Europe
- Outputs on 0.2° x 0.2 ° global lat/lon grid
- 50 ensemble members plus 1 control member
- Run 2 x daily at 00/12 UTC
- Data available out to 360 hours / 15 days - NB Only WMO essential timesteps and variables available on wxcharts.eu at this time
ARPEGE - Action de Recherche Petite Echelle Grande Echelle
- Issuing body - Météo-France, France
- Developed in collaboration with ECMWF
- Outputs on 0.1° x 0.1° European lat/long grid
- European grid ranges from 20N to 70N, 32W to 42E
- Run 4 x daily at 00/06/12/18 UTC
- 00 and 12 UTC runs have data out to 102 hours. 06 UTC run goes to 60 hours, and 18 UTC run to 72 hours.
AROME - Application of Research to Operations at Mesoscale
- Issuing body - Météo-France, France
- Highest resolution output available at 0.01° x 0.01°, approximately 1.3km
- Grid centred on France, but also includes England, Wales, Ireland, Benelux, Germany, Alps, N Italy and N Spain
- Run 5 x daily at 00/03/06/12/18 UTC (03 UTC run not displayed on wxcharts.eu)
- 00 and 12 UTC runs have data out to 42 hours. 06 and 18 UTC runs goes to 36 hours.
HARMONIE - HIRLAM ALADIN Research on Mesoscale Operational NWP In Euromed
- Issuing body - KNMI, The Netherlands
- High resolution local grid 2.5 x 2.5 km centred on The Netherlands
- Run 4 x daily at 00/06/12/18 UTC
- Data available out to 48 hours / 2 days
HIRLAM - High Resolution Limited Area Model
- Issuing body - KNMI, The Netherlands
- European 0.1° x 0.1° lat/lon grid with bounds 35N to 62.5N, 11.5W to 30E
- Run 4 x daily at 00/06/12/18 UTC
- Data available out to 48 hours / 2 days
NAM - North American Model
- Issuing body - NOAA, USA
- 3km x 3km CONUS NEST
- Run 4 x daily at 00/06/12/18 UTC
- Data available out to 60 hours / 2.5 days
HRRR - High Resolution Rapid Refresh
- Issuing body - NOAA, USA
- 3km x 3km CONUS NEST
- Run every hour (only even hours dispalyed on wxcharts.eu at this time)
- Data available out to 18 hours
Gives an overview of the general weather pattern. Variables included: precipitation rate, precipitation type (snow and rain only), total cloud amount (%), 2 m temperature and MSLP.
Gives an overview of variables key for winter weather forecasting. Particular focus on precipitation types including: snow, rain graupel, and freezing rain (FrzR). Snow depth is also shown where snow accumulates.
Temperature at 2 m above ground level (AGL). Units in Celsius for Europe, Fahrenheit for North America.
The temperature at which water droplets would begin to condense at 2 m AGL. This varies with pressure and humidity.
The depth of water in a column of the atmosphere, if all the water in that column were precipitated as rain. Units in Milimetres for Europe, Inches for North America.
Maximum temperature at 2 m AGL in the 3/6/12 hour period leading to the hour selected. Units in Celsius for Europe, Fahrenheit for North America.
Minimum temperature at 2 m AGL in the 3/6/12 hour period leading to the hour selected. Units in Celsius for Europe, Fahrenheit for North America.
The air temperature at the sea/water surface. Units in Celsius.
The temperature at approximately 1.5 km / 5000 ft above sea level where the atmosphere is typically considered free from the surface. Useful for showing air mass characteristics. Units in Celsius.
The local spin of the atmosphere, related to angular momentum. We have positive(anticlockwise) vorticity, which is usually associated with cyclones in the Northern Hemisphere and negative (clockwise) vorticity, usually associated with anticyclones in the Northern Hemisphere.
The sustained wind speed at 10m AGL (averaged over 1 minute)
The sustained wind speed at 10m AGL (averaged over 1 minute)
The sustained wind speed at 10m AGL (averaged over 1 minute)
The maximum sustained wind speed at 10m AGL (averaged over 1 hour) that occured during the last hour
The maximum sustained wind speed at 10m AGL (averaged over 1 hour) that occured during the last hour
The maximum sustained wind speed at 10m AGL (averaged over 1 hour) that occured during the last hour
The sustained wind speed at 850 Hpa - approximately 1.5 km / 5000 ft above sea level
The sustained wind speed at 850 Hpa - approximately 1.5 km / 5000 ft above sea level
The sustained wind speed at 850 Hpa - approximately 1.5 km / 5000 ft above sea level
The peak instantaneous wind gust felt at the Earth’s surface.
The peak instantaneous wind gust felt at the Earth’s surface.
The peak instantaneous wind gust felt at the Earth’s surface.
Aggregated wind gusts from T+0. Shows the maximum wind gust expected spatially over time. Useful for gauging wind impact of features such as tropical cyclones and squall lines
Aggregated wind gusts from T+0. Shows the maximum wind gust expected spatially over time. Useful for gauging wind impact of features such as tropical cyclones and squall lines
Aggregated wind gusts from T+0. Shows the maximum wind gust expected spatially over time. Useful for gauging wind impact of features such as tropical cyclones and squall lines
The sustained wind speed at 300 Hpa. Typically around 9 km above sea level, this is where we can monitor the jetstream. The jetstream is a narrow ribbon of fast moving air which can help drive and develop weather systems.
Mean Sea Level Pressure. High pressure is usually associated with fine weather and low pressure is usually associated with unsettled weather.
Approximately 6 km above sea level, the 500 hPa geopotential height is useful for relating the mid-upper atmosphere processes to the surface.
Average precipitation rate for rain and snow.
Instantaneous precipitation rate regardless of precipitation type. Units of dBZ (decibel relative to Z) to give comparison to raw radar output.
For most models this shows the total depth of snow and includes melt and compacting processes. For Arome and Arpege models however, the snow depth charts only show accumulating depth of snow since T+0, and do not include melt or compaction processes.
Stands for ‘Convective Available Potential Energy’. CAPE is a measure of positive buoyancy in the atmosphere and is an indicator of atmospheric instability. Higher CAPE values are associated with thunderstorms and severe weather.
A measure for potential (cyclonic) rotating updrafts, calculated for the lowest 3 km of the atmosphere. Values of 250m**2/s**-2 and greater are considered large and favourable for rotating (supercell) thunderstorms.
The wind difference between 0 – 6 km AGL. Useful for determining if thunderstorms could be supercellular (rotating) or not. Typically 25-40 kt marks the transition from non-supercell to supercell thunderstorms.
A dimensionless index calculated using surface based CAPE, bulk shear and storm relative helicity. The higher the value, the more likely supercell formation given initial convective initiation takes place
Compares the predicted 2 m temperature to what we consider normal (a 30 year average from CFSR 1981-2010 climatology)
Compares the predicted temperature at approximately 1.5 km above sea level to what we consider normal (a 30 year average from CFSR 1981-2010 climatology). Useful for knowing if an air mass is cooler or warmer than normal.
The temperature in the Stratosphere around 30km above the earths surface. Used to monitor the position of the Polar Vortex which can have an influence on winter weather at the earths surface
The mean temperature from all ensemble members at approximately 1.5 km / 5000 ft above sea level - where the atmosphere is typically considered free from the surface. Useful for showing air mass characteristics. Units in Celsius.
Approximately 6 km above sea level, the 500 hPa geopotential height is useful for relating the mid-upper atmosphere processes to the surface.
Mean Sea Level Pressure. High pressure is usually associated with fine weather and low pressure is usually associated with unsettled weather.
Mean Sea Level Pressure. High pressure is usually associated with fine weather and low pressure is usually associated with unsettled weather.
Compares the predicted temperature at approximately 1.5 km above sea level to what we consider normal (a 30 year average from CFSR 1981-2010 climatology). Useful for knowing if an air mass is cooler or warmer than normal.
Shows 850 hPa at certain contour intervals from all ensemble members. The more the lines look like a mess of spaghetti, the more unpredictable the forecast
The tracks of low pressure centres (with colours representing MSLP depth) from each ensemble member. ECMWF tracks only show lows of Tropical origin, whereas GEFS tracks show all low centres with associated winds above 22kts
The tracks of low pressure centres (with colours representing maximum storm mean 10m winds) from each ensemble member. The closer the lines for a given storm, the more predictable the path.
The amount of rain (or water equivalent of melted snow) accumulated from the beginning of the forecast.
The amount of rain (or water equivalent of melted snow) accumulated in a 24 hour period leading to the hour selected.
A virtual Infra Red (IR) satellite image using the model infrared radiation emitted by the cloud tops, land or ocean surfaces.
A virtual Infra Red (IR) satellite image using the model infrared radiation emitted by the cloud tops, land or ocean surfaces.
A combination of the virtual radar and satellite images
The forecast low level / boundary layer clouds. Good to show an indication of possible fog / stratus formation.
Instantaneous precipitation rate regardless of precipitation type. Designed to mimic real-time radar images.
Compares the predicted temperature at approximately 30 km above sea level to what we consider normal (a 30 year average from CFSR 1981-2010 climatology). Useful for highlighting areas of stratospheric warming.
Compares the predicted geopontential height at 500 hPa to what we consider normal (a 30 year average from CFSR 1981-2010 climatology).
Shows 500 hPa geopotential height at certain contour intervals from all ensemble members. The background shading is the mean of all ensemble members. The more the lines look like a mess of spaghetti, the more unpredictable the forecast.
Compares the predicted mean seal level pressure to what we consider normal (a 30 year average from CFSR 1981-2010 climatology). Usefull for showing where high/low centres are unseasonably strong/weak.
Shows MSLP at certain contour intervals from all ensemble members. The background shading is the mean of all ensemble members. The more the lines look like a mess of spaghetti, the more unpredictable the forecast.
Shows high/low centres from all ensemble members. The closer the highs/lows are together the more predictable the forecast.
The probability of winds exceeding 34 kt from all ensemble members. 100% probability means that all members have winds of 34 kt or more at a given location.
The percentage probability at any point of 850 hPa Temperatures greater than 20C based on all ensemble members.
The percentage probability at any point of 850 hPa Temperatures less than minus 5C based on all ensemble members.
The percentage probability at any point of 850 hPa Temperatures less than minus 10C based on all ensemble members.
A panel comparing the forecast temperature at approximately 1.5 km / 5000 ft above sea level from each of the 20 ensemble members, the control, their mean, and the deterministic (GFS).
A panel comparing the forecast 500hPa geopotential height from each of the 20 ensemble members, the control, their mean, and the deterministic (GFS).
A panel comparing the accumulated precipitation forecast from each of the 20 ensemble members, the control, their mean, and the deterministic (GFS).
A panel comparing the mean wind forecast from each of the 20 ensemble members, control, their mean, and the deterministic.
A panel comparing the snow depth forecast from each of the 20 ensemble members, the control, their mean, and the deterministic (GFS).
A panel comparing the mean seal level pressure forecast from each of the 20 ensemble members, the control, their mean, and the deterministic (GFS).
The probability (%) of snow falling in the 6 hours leading up to the valid time on the chart.
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MeteoGram Ensemble SkewT NEW 00 06 12 18
GFS 5d GFS 10d NAM ARPEGE
CAPE (J/Kg)SHEAR (kt)INDICIESWXCHARTS.EU
Surface0-1 kmLISRH
180-0 mb0-3 kmK IndexPWAT (mm)
255-0 mb0-6 kmEHISTM (kt)