Does the WeatherCam system run 24/7?
There is little point refreshing the website with the same black camera images at night. The Weather data section of the page will continue updating every 5 minutes, 24/7.
There is a 'hit counter' on the bottom. What's the difference between
visits and hits?
When I log on I only see still images. Is this correct or is my browser
not setup properly?
Will there be a full motion live stream from the cameras?
Do the images automatically update for me?
When I refreshed earlier, only two pictures came up and the third
box had a 'broken link' icon in it. Is there an intermittent camera
Sometimes the brightness and contrast varies between the cameras.
Is this a fault with the camera?
I noticed this morning that the wind direction indicated in the data
did not seem to be the same as where the boats were pointing in the
So to understand the apparent discrepancy with the boats direction and reported wind direction, it's important to note how the system actually assembles data for the site. The Weather Station takes a snapshot which lasts for less than half a second, and it is possible - more likely probable - that the wind direction vane was being buffeted around as they all do when the snapshot was taken.
Another point of interest here is that if the wind speed is read as zero by the system, the wind direction will not be updated. So if a light zephyr manages to turn the boats in the harbor without spinning the anemometer cups, the instrumentation will not reflect the direction shift until the anemometer is moving again.
oscillations, which are perfectly normal, appear averaged out using
the Wind Dir chart and although the oscillations are present, it becomes
very easy to recognise the predominant direction.
What is the 1 minute average and graph all about?
The new graphs seem to have scales that might be exceeded. What happens
if it blows over 25 knots?
There are spikes and lines everywhere. Why does it draw from top to
bottom like that?
The above example shows some of the behavior you are talking about. Let's start at the left hand side of the graph. At 10pm we had a quite steady breeze from the East (our evening Sea Breeze) at about 6 knots and an outside temp of approx 15 degrees.
Just after 11pm, the breeze started to decrease and turn toward the North. The breeze fluffs up and down from zero to 4 knots for the next hour, then dies out completely at 12.00. The direction indicator then parks at the last reading until the breeze returns.
At approximately 12.20am, a light 5 knots fills in from ESE until 1.30am when it drops out completely again for nearly an hour. At 2.30am the breeze fills in and progressively builds from the North. The huge trace-line oscillations on the graph represent the breeze swinging through North to the NNW and back through North to the NNE. You must consider that that this line graph is displaying all bearings on the compass rose, and consequently North appears at the top and the bottom of the chart.Therefore as mentioned, as the breeze passes through North, it will re-appear either at the top or bottom of the graph depending on the direction shift.
At about 3am, it settles in direction in the NNW and continues to build.
The remainder of the graph shows the breeze is flukey and gusty. If we were to determine a trend for this period, it would be that when the breeze softens it clocks left, then as the speed increases, it clocks right to the NNW again. Between 7am and 9am is a good indication of this trend.
Notice at about 2.10am the wind dies out and turns toward the North and the temperature, not surprisingly, increases. The barometer is dropping through this period.
Q. The direction graph is full of red - what's that all about?
A. I assume you've seen something like this an wondered if there may be something wrong..
No there is nothing wrong with this at all - although it might appear a bit odd at first glance. You need to consider that a compass rose is 360 degrees - and a circlular representation, where 0 and 360 are the same thing.
When you create an X/Y graph like this one, then there must be a top and a bottom to it - in this case 0 and 360....but these are the same point on the compass!
So in the context of this picture, it is telling us that the wind is hard out of the North (0 or 360 degrees) and is crossing through this point continuously to become NNW or NNE. In this image, just after 4am the breeze sat in the NNW for nearly an hour.
On the graph explaining the red trace line going top to bottom all
the time can you please explain why the small chart above it shows
that it is blowing easy 35-40, but the current wind speed is only
So I suggest that in this instance it is more appropriate to read the 1 minute average value - which takes all of the pressure you are talking about - gusts and lulls and all and produces an average for the last 1 minute. This produces a reading more consistent with the 'overall picture' than the snapshot does.