Please consider adding a bolded line at 5640 meter geopotential height on the 5000 hPa (mb) charts. This line is important for marine navigation and weather routing because most storms track 300 to 600 nautical miles north or south (towards the poles) of this line. See: https://vos.noaa.gov/MWL/dec_08/milibar_chart.shtml
Posts made by mrandall
5640 Line at 5000 hPa (mb)
RE: Tide Forecast on Windy
Okay, now I can see data for NZ stations in the right hand side bar. I don't see the "E" or "F" symbols for Ebb or Flood current at that station. I don't see the up or down arrows for high or low tides at that station. I see the boat icons only. I do see the symbols at stations along the US west coast, e.g. Columbia River entrance. Thank you.
RE: Tide Forecast on Windy
Great Idea. As of March 3, I see lots of little boat icons that correspond with NZ tide stations.
But I see no data when I click on any particular tide station: no tide table, no harmonic graph, and no current info either.
Boat icon is the same as was used for currents. Will these now be displayed together? Or are currents to be abandonded?
In Whangarei NZ.
500hPa (mbar) level
Re: 500mbar level
TZ, thanks for the reply 9 Jun.
On a 'traditional' 500 mbar weather chart, the values are heights (altitude) showing isohypse lines at 500mbar. That is, the whole chart is at 500 mbar. Is this also true for the way that Windy displays the geopotential layer at 500 hPa? Is this true for other geopotential heights displayed by Windy, above surface? Is there any plan to add isohypse lines. The recent addition of isobars for surface pressure is great.
RE: New pressure isolines: Testers wanted!
Great addition! I've been wanting this for a long time.
It seems that the isolines (previously known as isobars?) are sometimes 4 hPa, or sometimes 2 hPa, apart? If so, why the departure from standard meteorological practice? Label each line, or change the line style for the intermediate step 2 hPa lines. Line labels are a bit small and, some numerals mush in this font and size; e.g. 0, 6, and 8 are hard to distinguish.
Re: "Great new feature! It would be perfect with Isohypse lines as well (e.g. 850 / 500 / 300 hPa)." That would be a different plot. Very useful, but maybe best presented as a different layer. I would welcome that layer.
As to why, asked by "F": While the color gradations are quite good, the isolines add a great deal in understanding the pattern of the pressure. And especially change over days. For example, it's much easier to see cutoff lows (fully encircled), rather than low dips that appear like appendices, with the isolines than in the colors. This helps understand if there is risk of that low dissipating or strengthening. Also, tightly compacted isobars (lines) mean more wind. Looking over a smaller scale, say planning for an ocean crossing, it's easier to see and understand than differences in graticules.