AVOS data collected from 2010 to 2022 onboard the motor vessel (M/V) NAMAO on Lake Winnipeg and processed to show measurements every hour.
| Column | Type | Label | Description | Units | Media type | Result Value Type | Statistic Applied |
|---|---|---|---|---|---|---|---|
| SHIP NAME | text | Ship name | Name of the vessel. |
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| CALL SIGN | text | Call sign | Alphanumerical code or identifier (ID) that is assigned to a vessel. |
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| Data Date | text | Date time | Year (YYYY), month (MM), and day (DD) along with hour(s) (hh), minute(s) (mm), and second(s) (ss) formatted to ISO8601 (YYYY-MM-DD hh:mm:ss). |
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| LATITUDE | text | Latitude | Measurement of location either north (positive value) or south (negative value) of the equator in units of degrees and tenths. |
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| LONGITUDE | text | Longitude | Measurement of location either east (positive value) or west (negative value) of the prime meridian in units of degrees and tenths. |
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| MESG TYPE | text | Message type | World Meteorological Organization (WMO) coding system (FM 13-XIC Ext. Ship) obtained from the Environment and Climate Change Canada's Manual of Marine Weather Observations (MANMAR) for Automated Voluntary Observing Ship (AVOS) program. Officers observing weather conditions are encouraged file reports for SPREP and STORM conditions to assist in affirming weather forecasts. SPREP indicates a special weather report, where significant weather changes have taken place. A STORM report indicates that storm conditions are occuring, whether forecasted or not, and a wind speed increase of 48 knots (kt) or more has occured. For more information on what criteria is required for SPREP reports, please refer to MANMAR manual. |
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| WX IND | text | Weather indicator | World Meteorological Organization (WMO) coding system (FM 13-XIC Ext. Ship) obtained from the Environment and Climate Change Canada's Manual of Marine Weather Observations (MANMAR) for Automated Voluntary Observing Ship (AVOS) program. ECCC code or indicator to differentiate between all observations taken automatically, identified by a value of 6, or whether manual observations were taken (e.g. cloudiness, visibility, etc.), identified by a value of 1. |
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| DB | text | Air temperature | Measurement of air temperature in units of degrees and tenths (°C). |
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| TD | text | Dew point temperature | Value of temperature required for air to be saturated with water vapour to reach 100% realtive humidity in units of whole degrees celsius (°C). |
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| SST | text | Sea surface temperature | Measurement of sea water temperature at surface in units of degress and tenths celsius (°C). |
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| MSL | text | Pressure | Measurement of air pressure in units of hectoPascals and tenths (hPa). |
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| PRES TENDCY | text | Pressure tendency | Measurement of atmospheric pressure change over a three-hour period preceding the observation in units of hectoPascals and tenths (hPa). |
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| PRES CHAR | text | Present tendency | World Meteorological Organization (WMO) coding system (FM 13-XIC Ext. Ship) obtained from the Environment and Climate Change Canada's Manual of Marine Weather Observations (MANMAR) for Automated Voluntary Observing Ship (AVOS) program. Present tendency is a code that indicates the tendency of the pressure during a three hour before the time of observation. Please refer to the MANMAR manual on page 7-89 for further description of the numerical values. |
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| PCPC INDC | text | Precipitation indicator | World Meteorological Organization (WMO) coding system (FM 13-XIC Ext. Ship) obtained from the Environment and Climate Change Canada's Manual of Marine Weather Observations (MANMAR) for Automated Voluntary Observing Ship (AVOS) program. The percipitation grou pindicator is always coded as 4, indicating the ship does not have equipment onboard to measure percipitation. |
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| WIN INDC | text | Wind speed indicator | World Meteorological Organization (WMO) coding system (FM 13-XIC Ext. Ship) obtained from the Environment and Climate Change Canada's Manual of Marine Weather Observations (MANMAR) for Automated Voluntary Observing Ship (AVOS) program. A wind speed indicater code of 4 indicates wind speed obtained from anemometer (knots). Please refer to page 3-18 for other code indicator descriptions. |
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| WIN DIR | text | Wind direction | Measurement of wind direction in units of tens of degrees (°). |
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| WIN SPD | text | Wind speed | Measurement of wind speed in knots (kts). |