- A healthy gap is one of the conditions needed for a severe storm
- W011207Z
- Conditions needed for a severe storm. To be and remain severe, most storms must have a part of the sky all to themselves. This often means about 60-100 miles (100-160 km) between them in a line or at least enough space to maintain an undisturbed inflow when closer. Here, a healthy gap separates a storm behind (anvil overhead) from the distant axis with two supercells overshooting their tops.
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