While taking present weather observations, you note that the sky is full of wispy cirrus clouds estimated to b?

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While taking present weather observations, you note that the sky is full of wispy cirrus clouds estimated to be about 6 kilometers (km) overhead.

1. If a warm front is approaching from the south, about how far away is it (assuming a slope of 1:200)?

2. If it is moving toward you at an average warm-front speed of about 18 km/hour, how long will it take before it reaches your area?

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? Best Answer

  • The question has not very much to do with meteorology but rather, mathematics.
    If the front extends six kilometers overhead (which is not very much considering that the tropopause is perhaps between 10 and 18 km over us) and the slope is 1:200 (which sounds a lot) the distance is simply 200 times 6 = 1200 km away.
    If it moves at 18 km/hour (which is rather slow, IMHO) it will then take 1200 divided 18 = 66.66 hours to come over you. Incidentally, 66.66 hours is 2 days, 18 hours and 40 minutes.

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