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AIRMETs Vs. SIGMETS: What’s the Difference?

Pilot Institute

for any of the following: Severe thunderstorm due to: Surface winds greater than or equal to 50 knots. YYGGgg : Date and time of issue in UTC (Zulu time). issued on the 6th at 15:55 UTC The Summary Section The summary includes a brief overview of the SIGMET, providing validity, affected regions, and sequence information. [n][n]n

UTC 52
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What Is a SPECI and When Is It Issued?

Pilot Institute

A sudden wind shift, a 10-knot or greater speed increase, a 45-degree or more direction change, or gusts exceeding limits may also cause a SPECI. Wind Information The next thing you will find is wind information. This includes the wind direction in degrees and the wind speed in knots.