Which statement about SPECI timing is true?

Which statement about SPECI timing is true?

• A. The ascribed time is the end of the hour.
• B. The ascribed time is the time first met or observed.
• C. The ascribed time is the time halfway through the hour.
• D. The ascribed time is the time first met or observed, to the nearest minute.

Answer: (D)

The timing for a SPECI centers on when the weather condition that triggered the special report was first observed. That moment is captured with precision, rounded to the nearest minute, so the record shows exactly when the change began. This is why the statement describing the ascribed time as the time first observed, to the nearest minute, is the best fit—it reflects the actual onset of the condition and provides a precise timestamp for rapid changes. End-of-hour or halfway-hour references don’t reflect when the observation occurred, and rounding only to the exact hour or half-hour would lose important timing detail.

The timing for a SPECI centers on when the weather condition that triggered the special report was first observed. That moment is captured with precision, rounded to the nearest minute, so the record shows exactly when the change began. This is why the statement describing the ascribed time as the time first observed, to the nearest minute, is the best fit—it reflects the actual onset of the condition and provides a precise timestamp for rapid changes. End-of-hour or halfway-hour references don’t reflect when the observation occurred, and rounding only to the exact hour or half-hour would lose important timing detail.