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For this exercise, you will use the metview icons in the folder 'HRES_forecast' shown above. hres_1x1.mv & hres_2x2.mv : these work in a similar way to the same icons used in the previous task where parameters from a single lead time can be plotted either in a single frame or 4 frame per page.
hres_xs.mv : this plots a vertical cross section and can be used to compare the vertical structure of Hurricane Nadine and the cut-off low. TODO: check macros have not changed Image Added
mv_track.mv : for this exercise, this icon can be used to overlay the forecast track of Nadine (and not the track from the analyses as in Exercise 1) |
Task 1: Synoptic development (day 0-5)
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To add the forecast track of Hurricane Nadine drag and drop the mv_track.mv icon onto any map.
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| title | Questions to consider |
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Precipitation over France
Choose a hres macro (hres_1x1 or hres_2x2) and plot the total precipitation (parameter: tp), near surface wind field (parameter: wind10), relative humidity (parameter: r).
Change the area to France by setting 'maptype=2' in the macro script.
Other suggested isobaric maps
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- "vo850", "mslp" : vorticity at 850hPa and MSLP - low level signature of Nadine and disturbance associated with the cutoff low.
- "r700", "mslp", : MSLP + relative humidity at 700hPa - with mid-level humidity of the systems.
- "pv320K", "mslp" : 320K potential vorticity (PV) + MSLP - upper level conditions, upper level jet and the cutoff signature in PV, interaction between Nadine and the cut-off low.
- "wind850", "w700" : Winds at 850hPa + vertical velocity at 700hPa (+MSLP) : focus on moist and warm air in the lower levels and associated vertical motion.
- "t2", "mslp" : 2m-temperature and MSLP - low level signature of Nadine and temperature.
- "mslp", "wind10" : MSLP + 10m winds - interesting for Nadine's tracking and primary circulation.
- "t500","z500" : Geopotential + temperature at 500hPa - large scale patterns, mid-troposphere position of warm Nadine and the cold Atlantic cutoff.
- "eqt850", "z850" : Geopotential + equivalent potential temperature at 850hPa - lower level conditions, detection of fronts.
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| title | Questions to consider |
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Q. How strongly does Nadine appear to interact with the cutoff?
Q. What is the fate of the cutoff low and what synoptic conditions did it create over France? |
Task 2: Vertical structure and forecast evolution to day 10
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