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Any Convective SIGMET implies severe or greater turbulence, severe
icing, and low-level wind shear conditions. HELP |
CLIMATOLOGY
- Convective SIGMET (valid for 2-hours & issued hourly at Hour+55)
- Severe surface weather including:
- surface winds greater than or equal to 50 knots
- hail at the surface greater than or equal to 3/4 inches in diameter
- tornadoes
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