Re: Internet weather forecasts

>>What is the difference between frost and
>> freeze, and why the discrepancy?

Maddy,
I can't say for sure, hopefully someone else will chime in.  Below are a few
definitions I found, one of which indicates they are the same, but the
others seem to say there is some technicality separating the two.  To me it
seems like there can be a freeze with no frost depending on the amount of
moisture in the air.  I've also included a few definitons of kinds of
frosts.
Kitty

Freeze - weather cold enough to cause freezing syn: frost

FROST
The covering of ice crystals that forms by direct sublimation on exposed
surfaces whose temperature is below freezing.

FREEZE
The process of changing a liquid to a solid. The temperature at which a
liquid solidifies under any given set of conditions. Pure water under
atmospheric pressure freezes at 00?C or 320?F. It is the opposite of fusion.


Frost - The state or temperature of the air which occasions
      congelation, or the freezing of water; severe cold or
      freezing weather

Frozen dew -- called also hoarfrost or white frost

Black frost, - cold so intense as to freeze vegetation and
      cause it to turn black, without the formation of hoarfrost

Frost smoke  - an appearance resembling smoke, caused by
      congelation of vapor in the atmosphere in time of severe
      cold

Frost - Water vapour which deposits directly as a solid on a surface colder
than the surrounding air and which has a temperature below freezing. It is
not frozen dew. A Killing Frost is a frost severe enough to end the growing
season.

Frost: The deposition of ice crystals on a surface directly from the water
vapour in the atmosphere. The process is similar to dew formation except
that the temperature of the object must be below freezing, the frost point.

----- Original Message ----- 
From: <MyTGoldens@aol.com>
To: <gardenchat@hort.net>
Sent: Friday, October 03, 2003 8:56 AM
Subject: [CHAT] Internet weather forecasts


> I use AOL, but I figure it works the same with other browsers too. On the
> welcome screen, one can click on "weather" for the local forecast, and on
that
> screen, there are further links to weather information for specific
interests
> such as travel, skiing, gardening, etc. On the gardening screen, there are
> 10-day forecasts for temperature, precipitation, and frost and freeze
warnings,
> etc. I frequently see (esp. this time of year) the chance of frost listed
as
> "none", where the freeze warnings will have low, moderate, or even high
for the
> same days. I don't understand this. What is the difference between frost
and
> freeze, and why the discrepancy? And how could there be a freeze with no
frost? I
> even wrote in where I could submit a question, but no one bothered to
answer.
>
> And speaking of frost, my min-max thermometer showed a low last night of
> 31.6.  Luckily, nothing appears to have been damaged. Whew! I guess today
is the
> day to finally get all those tender things I want to dig up, along with
> containers and houseplants, finally in the house. Lots of work to do
today!
>
> Maddy Mason
> Hudson Valley, NY  zone 5/6
>
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