Meteorologymedium#133
The cloud base can be estimated using the formula:
A
(T - Td) × 400 ft
CorrectB
Spread × 400 ft
C
(T - Td) × 1000 ft
D
Spread × 100 ft
Explanation
Cloud base height (in feet) can be estimated by multiplying the temperature/dew point spread by 400.
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