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Weather at NSC – Current & 6-Hour History


In Off-line Mode

The NSC weather station is off-line for a number of days, during the move to the lighthouse at the harbour entrance.

Welcome to the NSC Weather Station page. Weather data displayed on this page, except for the Water Level, is collected by the NSC-owned Davis Vantage Pro2 Weather Station. Read the Usage Notes.

Welcome to the NSC Weather Station page. Except for the Water Level, the data displayed on this page is collected by the NSC-owned Davis Vantage Pro2 Weather Station, mounted on the lighthouse at the harbour entrance. Read the Usage Notes.


Usage Notes


All Wind directions are relative to True North.

The wind, temperature, pressure and humidity plots were developed by Daniel Servranckx using the Highcharts library. Features of Highcharts include the ability to display conditions at any given time by hovering your cursor over the chart, and the ability to highlight or de-select certain properties by clicking on that property on the chart's legend. Highcharts is a commercially-available charting library available at no charge for not-for-profit organizations like NSC.

Weather Station Data

The NSC's weather station sensor uploads a block of data every 5 minutes to the Davis Weatherlink Cloud Storage through a small device connected to the internet via the office router. Every 5 minutes starting on the hour, the NSC web server downloads a block of "current" data from the WeatherLink Network and stores the time, wind, temperature, humidity and pressure values in a running 6-hour file. When you open or reload this page, the 6-hour file is downloaded by your web client and processed to generate the charts below. To update the charts, reload the page.

The wind speeds, gusts and directions, plotted in 5-minute increments, use "last 2-minute average" values. Note that this is different from the 1-hour increment plots in the 7-day History page which use "last 10-minutes average" values. Therefore, the hourly values displayed in this page and the 7-day History page may differ.

The data on the Weatherlink Network is also available to other weather websites, including Weatherlink, Weather Underground and CWOP. The graphic immediately below is from the Davis Weatherlink site, and shows current conditions, daily high & low temperatures, daily peak winds, and daily and seasonal rainfall. The seasonal rainfall will reset on May 1 each year. Unlike the other plots below, this information is automatically refreshed every minute.

Wind Direction

The wind direction polar plot is also known as a Radar Plot; it shows the most recent wind direction at the outside of the polar plot, similar to the depiction of the original NSC "Windicator". If the wind drops below 1.0 knot, the plotted direction is frozen until the wind increases to at least 1.0 knot. When the first data point wind speed is 0 knot, the plotted direction is reset to North.

Wind Frequency

The wind frequency polar plot is also known as a Wind Rose. The average wind data points are grouped by speed and direction according to one of 7 speed ranges and 16 compass (cardinal) points. Groups are plotted as color-coded sectors.

Wind: Prevailing & Gusts

This chart presents prevailing wind strength and direction (based on True North) on an X-Y scale. The directional arrow is replaced by a small dot if the wind drops below 1.0 knot. The vertical axis adjusts its scale automatically to accommodate the winds over the previous 6 hours.

Temperature, Pressure & Humidity

Self-explanatory, similar to the chart, "Wind: Prevailing & Gusts".

Water Level

The water level plot uses data from the Environment Canada Water Office's Hydrometric data for station 02KF005 (Britannia). The data file is refreshed every 2 hrs (Apr-Oct), or 4 hrs (Nov-Mar). Be advised that there are occasional data gaps, characterized by constant levels over several time intervals, as well as occasional data lags when no new data is available.

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The above is as an embedded frame from Davis WeatherLink.

Station data updated at . Refresh.
A 7-day History is also available.

The Weatherlink data file is not available.

Environment Canada Water Office Server returned no data.

For more water level information, see Water Levels – Ottawa River.

Page updated: 2021-03-09.
Questions or Comments? Please email Weather | Credits



Several members contributed to the NSC Weather Station Project:

Data Manipulation and Presentation

Daniel Servranckx designed the data acquisition, conversion and handling from the Davis Weatherlink Live repository, created this page layout and content, and coded the Highcharts scripts that generate the embedded chart displays.

Yaro Shkvorets's work on the previous RBR Weather Station display was used as a reference for the current design.

Weather Station Acquisition, Installation and Testing

Marek Dziedzic conducted the overall requirements analysis, liaised with potential vendors, created the purchasing specification document, created the Davis WeatherLink Live account, ran hardware acceptance tests, participated in the station mount design and in the overall web layout and application testing.

Hugh Morrin initiated acquisition process with the Fleet Captain, assisted Marek with the specifications document and mounting design, liaised with the Canadian Coast Guard for the authorization to mount the station on the harbour entrance lighthouse, liaised with Gene Bruce for the physical mounting on the lighthouse, and participated in the overall web layout and application testing.

Note: The Davis Weather Station and a 3-year subscription to the Weatherlink Pro Cloud Storage were funded through the NSC Fleet Captain's budget.