Synoptic Chart Reading Practice, Weather Exam Drill Pack A4 PDF
Most weather revision asks you to recognise a chart. This pack asks you to work it, and the answer key is computed from the pressure field rather than estimated off the paper.
Sheet 01 takes the geostrophic relationship apart without calculus: the pressure gradient force normal to the isobars, the Coriolis parameter, and the working form Vg = 587.5 x interval divided by sine latitude times spacing, with the air density assumption printed beside it and a fully worked example at 50 North
Sheet 02 is a schematic section through a mature depression with a ruled table of what a warm front, a cold front and an occlusion each bring before, during and after passage, including the poleward exception that reverses the wind shift
Sheet 03 is the station model: one large annotated example, a full wind barb reference strip from calm to 100 knots, and twelve models to decode with answer spaces
Sheets 04 and 05 carry six generated charts: three asking for the wind and weather at marked positions, three asking what the next twelve hours bring at a given system movement
Sheet 06 is the answer key across two faces, with the marking tolerance, the surface wind convention and the curvature caveat all stated in plain terms
Every field is fictional and generated for practice, so nothing in the pack expires; A4 and US Letter editions included
The charts here are analytic pressure fields: a background pressure plus a sum of pressure centres. The isobars are exact contours of that function and the wind at any point comes from its gradient, so the key is right by construction rather than by estimate. The printed answers are then re-derived from the values a candidate actually reads, spacing to the nearest 10 nautical miles and latitude to the nearest degree, so careful measurement agrees with the key.
Where published sources give a range rather than a figure, the pack says so and prints its own working convention instead of dressing a rule of thumb as a constant. The surface wind reduction and backing, the marking tolerance and the Beaufort rounding rule are all declared on the face of the key.
What's inside
Cover and how to use
WXD-01 From isobar spacing to the wind you get
WXD-02 Fronts, and what each brings in order
WXD-03 The station model
WXD-04 Drill A: three charts, wind at a position
WXD-05 Drill B: three charts, the next twelve hours
WXD-06 Answer key, two faces
Combined pack PDF plus individual sheet PDFs, each in A4 and US Letter
Who it's for: Yachtmaster Offshore and Ocean candidates, OOW students and anyone who has to read a synoptic chart under exam conditions and state the wind, the weather and what happens next.
Licence: Personal and classroom use. You may share and repost this content, including commercially. You may not resell the files themselves or sell them on as a standalone product. Copyright remains with Maritime Master Limited.
Printing: Print at 100% on the paper size you downloaded, never fit to page: a shrunk print makes every measured spacing wrong. The latitude scale and the nautical mile bar are drawn inside each chart and scale with the sheet, so the A4 and the US Letter edition both measure correctly. Greyscale by design; prints cleanly in black and white.
