| Something indicated on weather maps by a blue line with triangular spikes (4,5) |
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| Old track (4,5) |
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| Weather (forecast) feature |
The Guardian Quick |
31 Mar 2023 |
| Leading edge of cooler temperatures |
The Washington Post |
21 Aug 2019 |
| Leading edge of cooler temperatures |
LA Times Daily |
21 Aug 2019 |
| Harbinger of lower temperatures, and a hint to the answers to starred clues |
The Washington Post |
15 Jul 2019 |
| Leading edge of cooler temperatures |
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| Harbinger of lower temperatures, and a hint to the answers to starred clues |
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| It ushers in lower temperatures ... and what the answers to starred clues can have |
The Washington Post |
17 Sep 2017 |
| It ushers in lower temperatures ... and what the answers to starred clues can have |
LA Times Daily |
17 Sep 2017 |
| Weather feature that's source of corrosion on antique facade |
The Telegraph Cryptic |
29 Mar 2017 |
| It ushers in lower temperatures ... and what the answers to starred clues can have |
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| Weather map line |
Thomas Joseph |
28 Dec 2016 |
| Wintry weather map feature |
The Washington Post |
21 Dec 2016 |
| Facade of indifference for a feature of the weather? |
The Telegraph Cryptic |
21 Oct 2015 |
| Harbinger of lower temperatures |
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| CO? |
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| Harbinger of lower temperatures |
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| CO? |
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| It can make one wear heavier clothing |
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