Jump to content
IMPORTANT ANNOUNCEMENT ABOUT LOGGING IN ×
  • WELCOME GUEST

    It looks as if you are viewing PalmTalk as an unregistered Guest.

    Please consider registering so as to take better advantage of our vast knowledge base and friendly community.  By registering you will gain access to many features - among them are our powerful Search feature, the ability to Private Message other Users, and be able to post and/or answer questions from all over the world. It is completely free, no “catches,” and you will have complete control over how you wish to use this site.

    PalmTalk is sponsored by the International Palm Society. - an organization dedicated to learning everything about and enjoying palm trees (and their companion plants) while conserving endangered palm species and habitat worldwide. Please take the time to know us all better and register.

    guest Renda04.jpg

weather in my garden


elHoagie

Recommended Posts

In the middle of January I started recording the temperature inside a homemade Stephenson screen located in an exposed part of my garden.  I've finally analyzed some of the data, and put a summary up on my website.

Jack's weather

Jack Sayers

East Los Angeles

growing cold tolerant palms halfway between the equator and the arctic circle...

Link to comment
Share on other sites

Jack-

Looks good!  But, it sure does seem like you guys had a very cool late winter/spring.

Do you have a pic of your Stephenson Screen?

And, is your thermometer able to read down to 0.1C resolution (regardless of whether its actually precise to 0.1C)?  I ask as, in the metric system, 1 degree resolution is quite wide when one starts getting down towards the freezing point.

Larry 

Palm Harbor, FL 10a / Ft Myers, FL 10b

Link to comment
Share on other sites

Heres a pic of my homemade Stephenson Screen.  Its since had another "hat" added to the top.

Its also aggressivelly fan aspirated (I measured 9-11 ft/sec through it) through both the small holes in the sides and a larger hole in the top under the hat.  It works like a champ as Ive never had a bogus high temperature reading this summer.

Picture_0315.jpg

Larry 

Palm Harbor, FL 10a / Ft Myers, FL 10b

Link to comment
Share on other sites

(spockvr6 @ Aug. 25 2006,21:08)

QUOTE
Jack-

Looks good!  But, it sure does seem like you guys had a very cool late winter/spring.

Do you have a pic of your Stephenson Screen?

And, is your thermometer able to read down to 0.1C resolution (regardless of whether its actually precise to 0.1C)?  I ask as, in the metric system, 1 degree resolution is quite wide when one starts getting down towards the freezing point.

Larry,

Yeah, this spring was terrible.  I recorded the coldest day in my 3 years in Altadena in late Feb (1C), then that record was broken three weeks later in mid March (0C).  Also, I think March was the coldest month since 1990 in LA (coldest month, not just coldest March).

I'll try to get a picture of the Stephenson screen in the next couple days.  It's not too different from yours.

My thermometer displays temperatures with 0.1 degree resolution (in F or C).  But, I only trust the accuracy to about 1C, which is why I rounded all the data.

Jack

Jack Sayers

East Los Angeles

growing cold tolerant palms halfway between the equator and the arctic circle...

Link to comment
Share on other sites

Very interesting.  I love your weather stuff Jack!  You big scientist you!

Matt Bradford

"Manambe Lavaka"

Spring Valley, CA (8.5 miles inland from San Diego Bay)

10B on the hill (635 ft. elevation)

9B in the canyon (520 ft. elevation)

Link to comment
Share on other sites

(MattyB @ Aug. 31 2006,01:21)

QUOTE
Very interesting.  I love your weather stuff Jack!  You big scientist you!

Thanks Matt.  I try to stay as nerdy as possible...

Jack Sayers

East Los Angeles

growing cold tolerant palms halfway between the equator and the arctic circle...

Link to comment
Share on other sites

  • 2 weeks later...

(spockvr6 @ Aug. 25 2006,21:08)

QUOTE
Do you have a pic of your Stephenson Screen?

Larry,

I finally got off my lazy ass and took a picture (actually la Hoagie took a picture).  Anyway, here it is.

post-74-1158115951_thumb.jpg

Jack Sayers

East Los Angeles

growing cold tolerant palms halfway between the equator and the arctic circle...

Link to comment
Share on other sites

(elHoagie @ Sep. 12 2006,22:52)

QUOTE

(spockvr6 @ Aug. 25 2006,21:08)

QUOTE
Do you have a pic of your Stephenson Screen?

Larry,

I finally got off my lazy ass and took a picture (actually la Hoagie took a picture).  Anyway, here it is.

What is a Stevenson Screen?  Something to shield a thermom from the sun?

St. Pete

Zone - a wacked-out place between 9b & 10

Elevation = 44' - not that it does any good

Link to comment
Share on other sites

(elHoagie @ Aug. 31 2006,13:04)

QUOTE

(MattyB @ Aug. 31 2006,01:21)

QUOTE
Very interesting.  I love your weather stuff Jack!  You big scientist you!

Thanks Matt.  I try to stay as nerdy as possible...

I suggest that we call Jack...THE PROFESSOR...from here on out.

Make me a radio out of a coconut, Jack...err...professor.

(it's not so bad...Mary ann had a crush on him)

If global warming means I can grow Cocos Nucifera, then bring it on....

Link to comment
Share on other sites

Ha ha wha. Oh, sorry I'm late. There was trouble at the lab with the running and the exploding and the crying when the monkeys stole the glasses off my head. Wh-ha ha.

post-74-1158170573_thumb.jpg

Jack Sayers

East Los Angeles

growing cold tolerant palms halfway between the equator and the arctic circle...

Link to comment
Share on other sites

(SunnyFl @ Sep. 12 2006,23:05)

QUOTE

(elHoagie @ Sep. 12 2006,22:52)

QUOTE

(spockvr6 @ Aug. 25 2006,21:08)

QUOTE
Do you have a pic of your Stephenson Screen?

Larry,

I finally got off my lazy ass and took a picture (actually la Hoagie took a picture).  Anyway, here it is.

What is a Stevenson Screen?  Something to shield a thermom from the sun?

Yeah, just something to shield the thermometer from the sun while also allowing for good air movement across the thermometer.

Jack Sayers

East Los Angeles

growing cold tolerant palms halfway between the equator and the arctic circle...

Link to comment
Share on other sites

Jack-

Your screen looks great!

These things are pretty much, IMO, required to get good high temp readings.  Otherwise, the slightest bit of sun yields an obviously flawed result.

Merely hiding the sensor in a spot which does not see sun (like tucked under the eave of a roof, etc) is something many folks do, but this will usually give a falsely high low temp reading on colder nights.

So, one is usually left to devise some sort of ventilated shelter for the thermometer to get realible readings and these types of screens seem to work well.

Larry 

Palm Harbor, FL 10a / Ft Myers, FL 10b

Link to comment
Share on other sites

Yeah, just something to shield the thermometer from the sun while also allowing for good air movement across the thermometer

Excellent, Jack..... I have to make one of those for my greenhouse... I was getting so many false readings last year it was ridiculous..... Went from 60f to 110f in an hour... lol... now we Know that's impossible.

Bobby

Long Island, New York  Zone 7a (where most of the southern Floridians are originally from)

AVERAGE TEMPS

Summer Highs  : 85-90f/day,  68-75f / night

Winter Lows     : 38-45f/day,   25-35f / night

Extreme Low    : 10-20f/day,    0-10f / night   but VERY RARE

Link to comment
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now



  • Recently Browsing

    • No registered users viewing this page.
×
×
  • Create New...