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in fact it's happened as early as 19nov and late as 16mar since 2010. It's happened on almost every day of January over that time frame and many days in Feb/Dec .
That would make it the area's equivalent to Burlington Pier then.
And it seems like it was only moved there in 2003, before that it was at the Custom House (which as it turns out is over 100m from the water!)
In a 30 year period prior to that (1973-2002), it was 9a/9b with -4C as the median, and this included the freak Arctic outbreaks of the 1970s and 1980s.
So if it was still at the Custom House it would certainly still be 9b in 1991-2020. Probably not -2C 9b, but still.
Last edited by Can't think of username; 01-20-2023 at 01:14 PM..
in fact it's happened as early as 19nov and late as 16mar since 2010. It's happened on almost every day of January over that time frame and many days in Feb/Dec .
Wrong station. You are going to the cold hole airport, select the Downtown Charleston option which is the 3rd option down.
Wrong station. You are going to the cold hole airport, select the Downtown Charleston option which is the 3rd option down.
I think thats 22? days in 30 years that's not bad less than 1 per year. Still 9a though. Take it up with the USDA - their map shows 9a for Charleston downtown and 8b for the surrounding area. Their scheme is designed for US agriculture, which mostly takes place in the continental and continental-influenced subtropical parts of the country. It doesn't apply well to Ireland or Portugal and wasn't meant to. It wasn't meant for oceanic and med climates. There aren't many of those climates in the US. The ones that are here aren't centres for US agriculture
I think thats 22? days in 30 years that's not bad less than 1 per year. Still 9a though.
It's not, see below. That's 9b with the majority method, we'd have to refine everything with this minority method which is no good for judging the climate (the topic of the thread), just things that may or may not grow.
Quote:
Originally Posted by Space_League
Take it up with the USDA - their map shows 9a for Charleston downtown and 8b for the surrounding area.
That map is outdated. It's 1976-2005, we are in 1991-2020.
Nobody should be going off of it for any reason other than to see how USDA zones have changed between then and now, or what USDA zones were like back then. Period.
Quote:
Originally Posted by Space_League
Their scheme is designed for US agriculture, which mostly takes place in the continental and continental-influenced subtropical parts of the country. It doesn't apply well to Ireland or Portugal and wasn't meant to. It wasn't meant for oceanic and med climates. There aren't many of those climates in the US. The ones that are here aren't centres for US agriculture
Their scheme is still pretty inferior to the Canadian scheme, which takes into account if I remember right things like wind, snow, sun, precipitation, averages, how fast it warms up, what temperature it warms up to, how many times it gets to the lowest temperature, how long it stays at the lowest temperature, and how many frosts there are, which are variable even among the same USDA zones in the Southeast (compare Archbold Station to Cape Hatteras for example).
So I would still stick with it as being a means to judge what the usual low is for weather monitoring. Meaning, of course, solid 9b instead of anywhere near 9a.
The USDA zone is designed for commercial agriculture secondary use for personal gardening. Commercial agriculture is not taking place in downtown Charleston nor on Tybee island at any scale. Determining the microzones there is just for fun. If there is a 100 meter stretch on the beach that rarely freezes but the rest of the area gets to 20f every other winter, that's neat but not as relevant to the general climate of the region.
Crops will be grown in places much more like the airport or further inland. For personal gardening, you can take advantage of microclimates and even create submicroclimates with landscaping and water features to boost the growable range of sensitive plants. For commercial agriculture, I think even one year in ten with <20f is enough to scare anyone serious from growing say 9b fruit bearing trees in that climate. Nevermind 10a, it would be unthinkable to do that for commercial agriculture when there are far safer places to grow them. Not to say that a true 10a place will never have a temperature below freezing. Central FL citrus country is full of horror stories about it.. But on the other hand, I don't think someone will grow a 9b plant commercially in Charleston or Tybee Island, even if there was cheap
That would make it the area's equivalent to Burlington Pier then.
And it seems like it was only moved there in 2003, before that it was at the Custom House (which as it turns out is over 100m from the water!)
In a 30 year period prior to that (1973-2002), it was 9a/9b with -4C as the median, and this included the freak Arctic outbreaks of the 1970s and 1980s.
So if it was still at the Custom House it would certainly still be 9b in 1991-2020. Probably not -2C 9b, but still.
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