bell32ndst's WunderBlog

I was wrong about no more frosts

By: bell32ndst, 4:38 PM GMT on February 29, 2012

Well, this morning proved me wrong about there being no more freezes in store for my part of Phoenix - it got down to 31 degrees here. It was clear and dry, so easy to radiate the heat away. It might be colder tonight. There was a lot of dust in the air last night left over from the arrival of the cold front with its high winds. If that moves out, it will be easier for heat to radiate, but counteracting that is the effect of a full day of solar heating.

Have to wait and see if it did any damage to the citrus, with its tender new leaves and flower buds exposed. If it is all OK, in a few weeks, the air will be rich with the fragrance of citrus blooming. How long the fragrance lasts will depend on how quickly it gets hot. That transition used to take a month or so, but lately it seems to happen from one week to the next. Lower seventies to higher eighties and low nineties in a few days. Maybe that is just faulty memory.

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Warming up overnight lows

By: bell32ndst, 9:21 PM GMT on February 17, 2012

It's pretty hard for those dry, cold arctic air masses to sustain their cool at this time of year in Arizona. The sun is starting to have some power. That is reflected in the rise of the morning low over the last two days since the heavy freeze. Yesterday it was 31, today is was 34. I think the risk of frost from this air mass is gone, and probably the risk of frost for this spring in Phoenix is over.

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Heavy freeze in the middle of February

By: bell32ndst, 3:52 PM GMT on February 15, 2012

27 degrees here this morning!!! This is the middle of February, we shouldn't be seeing that kind of temperature. Two hours after sunrise and many of the roofs around still have frost on them. What's going on? Killer for my tomatoes and the transfer plantings I did, thinking it was a normal spring. Hope the poppies and dill make it.

Ignore the official low temperature for Phoenix. That's in some kind of micro climate, all that concrete and irrigation caused humidity make it about 10 to 15 degrees higher than the burbs. The highs are better, within a few degrees.

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