scottd
Pre-takeoff checklist
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In the Southeast? What specific location? 15,000 feet? What kind of aircraft?
I look forward to your comments. We flew out of there Monday and were -7C in the mid teens and got rain that wasn't freezing. Lots of wind out of the west and a lot of convective activity, but no ice. It was very interesting.
Farther west, there was a constant cloud deck around 6,000 feet for hundreds of miles. When we finally descended in the Dallas area, it was 70F just above the clouds and the temp quickly dropped down to the upper 40s in the clouds with bottoms about 1,400 feet. Interesting stuff!
Here's a case last year where I was flying with an instrument student up in the Bismarck area. The temperature at 6,400 feet was 72°F (22°C). As we descended on the approach into the clouds, the temperature dropped to 47°F (8°C) at the cloud tops. That's a drop of nearly 29°F in a little over 1,000 feet. Of course, we had spent a fair amount of time looking at the weather prior to departing, so this wasn't a shock and the temps in the clouds were well above 0°C. Still pretty amazing to see such a drastic drop in temperature in just 1,000 feet.