Our destination is 3JO. The weather upon our arrival according to the Graphical Aviation Forecast is ceiling at 2500' and visibility at 5 miles. Do we need an alternate?

Question

BlackTom AI · Accepted Answer

Let's break down the scenario and the rules that govern alternates for IFR flights. The key decision is whether, at the destination at the expected time of arrival (ETA), the weather will meet the required minimums to land without needing an alternate.
Option: Yes.
- The statement claims an alternate is required. But we must compare this to the forecasted conditions: ceiling 2500 feet and visibility 5 miles.
- For many standard IFR planning rules, the destination must be forecast to be at or above 2000 feet ceiling and 3 miles visibility at the ETA (and for certain approaches or operator policies, higher minima may apply, but 2000/3 is the common threshold used in many planning scenarios).
- Since 2500 ft ceilings and 5 miles visibility exceed the 2000/3 minimums, the forecast at ETA suggests the destination would be serviceable without needing an alternate.

Option: The statement is incorrect because the forecast demonstrates sufficient conditions at ETA. The ceiling is well above 2000 feet, and the visibility is more than 3 miles, which satisfies the minimums for a non-precision approach in many standard IFR planning methods.

Misconception to watch for: Assuming any forecasted ceiling or visibility below a specified threshold automatically requires an alternate. In this case, the forecasted weather is not below the typical 2000 ft/3 sm minima; therefore, no alternate would be required under common planning rules.

Other potential pitfalls: Be mindful that operator-specific requirements, approach type (precision vs non-precision), and alternate weather rules (e.g., required alternate planning ceilings/visibilities if the destination’s weather is below certain thresholds) can modify this conclusion. But with the given forecast of 2500 ft/5 sm, the standard criterion is satisfied, not necessitating an alternate.

FA_221 Lesson 30 Quiz

Our destination is 3JO. The weather upon our arrival according to the Graphical Aviation Forecast is ceiling at 2500' and visibility at 5 miles. Do we need an alternate?

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Our destination is 3JO. The weather upon our arrival according to the Graphical Aviation Forecast is ceiling at 2500' and visibility at 5 miles. Do we need an alternate?

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