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AIRMETs Vs. SIGMETS: What’s the Difference?

Pilot Institute

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 VALID YYGGgg/YYGGgg : The period the SIGMET is active, using UTC times. MOV N 30 KT).

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

Pilot Institute

Thunderstorms can also bring wind shear and lightning. For example, “WS” means wind shear, which is important for approach and landing, while “SLP” provides detailed sea-level pressure information for adjusting your altimeter. 011955Z : The date and time of issuance (first day of the month at 19:55 UTC).