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Weather data

Posted by dennis1983 (My Page) on
Tue, Aug 5, 14 at 23:58

Hi

I think here have been talk about weather sometimes.

It is not easy to find weather data on internet that

is easy to use. In form that is easy to use i meant.

I can give those internet address so you can look to

them, if you want to see weather data. Hopefully

those are useful to someone. I have found some

temperature data on internet that is easy to use.

Temperature is probably the most important weather

information in gardening. Those sites have

temperature data and other data if you need past

weather data.

First site is classic.wunderground.com . There is

weather data which you can see and copy to Excel. If

you want get that data to Excel, just select it then

copy it and paste it to Excel. It should make it

right way so you can in Excel do calculations. Many

weather station in U.S.A. report once per hour data,

sometimes there is more than one report per hour

because there might be rain or some other event that

have made more reports. There is temperature, dew

point. relative humidity in percent, air pressure in

sea level, weather conditions data. It also

calculates average high, average and average low

temperature when you have selected many days time

range. That site also calculates growing degree days.

It use formula daily high + daily low and then divide

it by 2 in fahrenheit degrees and result is then

reduced base of 50 fahrenheit. If that calculation is

negative then that day is zero growing degrees,

nothing growing degrees is reduced. When you choose

time range then growing degrees are sum of those days

calculated same way.

http://www7.ncdc.noaa.gov/CDO/cdoselect.cmd?

datasetabbv=SUMMARIES&countryabbv=&georegionabbv=&res

olution=0

This site is global hourly weather data. Next link is

from same global hourly weather data site it couldn't

be selected from above link, so another link was

needed. I think i should mention this.

Before we start, i need to say something about this

weather data. Global hourly weather data use GMT

times, not local times. So you need to adjust times

in your head to local times. For example Miami,

Florida, U.S.A. is 5 hours less than GMT time so if

it says 17:52, local time is then 17:52-5 hours which

is 12:52. Also GMT time don't change to summer time,

so in summer time this difference is 4 hours less

than GMT time. So you need to know your time zone,

otherwise you might be thinking why highest

temperature occur in night or something other similar

situation. Global hourly weather data use 24 hour

time in day, that is good to know if you live in

U.S.A. which use a.m. and p.m. time. So 17:52 is 5:52

pm in GMT time. Global hourly weather data use year,

month, day way to write dates, not same way as in

U.S.A. where you write month first, then day,then

year, also dates are written in numbers, so you can't

write like month june. This site write year in 4

numbers, month in 2 numbers, day in 2 numbers, hours

in 2 numbers and minutes in 2 numbers. If month is

less than 10, you put 0 forward to it number, for

example 6 is june, you put 06 to number. Same way to

days, hours and minutes. For example 200806241752 is

24 day june 2008 time 17:52. That way all dates have

same amount of numbers, it is easy to remember that

they go from biggest time to smallest time from left

to right. Weather data is text format, so you can

search it by contol + f, just remember how dates are

written and don't search word like june. That was

idea to next link. I think that was about common

ideas global hourly weather data. I show you how to

get data, i got mine data and you can follow me same

time and do same things and get your own data. If i

say Miami data, you can choose your own location and

get your own data, way to get it is same. Many of

those data need your e-mail address where your

requested data link can be sent. It is free to get

data. Now we can go to statistic data.

Actually it is summary data, it is statistic weather

data. It calculates statistic from weather data.

First you choose where you want data, location in

other words. I suggest choosing country and in that

box country you want the data. For example if we want

Miami, Florida, U.S.A. let's choose United states

country and continue. Next page let's choose Florida

and continue. Next page let's choose Miami

international airport as it has newest data and click

continue. Dates are which data are available,

starting from first date and ending last date. Now we

need to make selections what time period we want

statistic to be calculated and choose which weather

observation we want to use. Number 3 section we can

choose time period from to which statistic is

calculated, everything between those date are

calculated to statistic. For example if we choose

from year 2008 month 01 day 01 hour 00 to year 2012

month 12 day 31 hour 23 everything between those are

calculated to statistic. If i remember right this

doesn't allow you to make statistic less than 1 year,

if you choose less than 1 year then results might be

made to 1 year statistic even you choosed less than 1

year time range. You can use section 1 times too but

those other give you more flexibility to make

statistic. You can use section 4 too, If you want use

other than section 3 remember change that button to

that section BTW forgot to say. Section 4 allows you

to choose selected times and dates. You can click

year, month and hour. You can select many dates and

times when you press Ctrl button and then select

them. Then statistic is calculated from them. On

section 3 there was also output format, single table

summary give summary of all year you choose. If you

choose multiple table summary i think it gives

summary of each selected year plus summary of all

years. That might be faster way to see years

statistic than doing one year search at a time.

Section 5 observation type, i would leave it as it

is. Section 6 now you select what kind of summary you

want. If you want temperature, then select

temperature statistic summary and continue. If you

select current year temperature data, then you don't

need to give e-mail address. Give your e-mail address

here, you get e-mail message to that address when

your statistic is ready which have internet address

to your statistic. After you gave your e-mail

address, you can leave or do another statistic

request if you want, you don't need to wait your

request to be ready. It may take little bit time to

do your request. If you requested temperature data,

results show temperature in celsius degrees. Left to

right you see first months and annual which means

yearly temperature. Then you see hours going down in

left column. Mean means average temperature, stdv

means standard deviation it is one kind of measure

how much there is variation in numbers around

average, smaller number means less variation and

bigger number means bigger variation, obs is number

of observation. For example jun hour 17 means on

average on years you selected in june time 17

temperature was that, had that standard deviation and

was calculated from that number of observation.

Annual column 17 means on all days that years you

selected on time 17 temperature, standard deviation

and number of observation was. Total in last is

monthly average, standard deviation and number of

observation and annual total is years you selected to

be calculated years average temperature, standard

deviation and number of observation. When i checked

Charlotte, North Carolina, U.S.A. weather data FM-15

and FM-12 observation was counted to statistic, but

not FM-16, i calculated it so. I think that has done

that way because that way statistic don't go bad so

easily. Don't worry i tell later what those are, if

you didn't understand them. Now we can go to next

link.

http://cdo.ncdc.noaa.gov/pls/plclimprod/poemain.acces

srouter?datasetabbv=DS3505

In this site we have actual weather data which we can

look. We have advanced and simplified option. Let's

first look advanced option. Let's click advanced

option. Let's get Miami, Florida, U.S.A. so let's

choose country United States and continue. Then

choose Florida and continue. Then Miami international

airport continue. Now we can choose data we want to

get. Let's get temperature data, air temperature

observation. You can select many of those if you

want, tips to doing do is end of that site as you

see. All data elements give all data, not all of

those probably are not available but you can try it

if you want to see what data is available. You can

request small let's say 1 day all data to see what

those elements have data available. It is good to

know weather station reports different way extreme

temperatures which don't show in observations. Those

shows probably higher maximum and lower low

temperatures than weather observation because they

are maximum and minimum temperature. You can see them

if you select Extreme air temperature if you are

interested those temperatures. Let's get temperature

data so let's choose air temperature observation. Now

we can choose dates same way as in statistics. Let's

choose for example from year 2008 month 01 day 01 to

year 2014 month 08, day 05. I would leave those other

as they are. Then continue. Then it shows your

request, now you need to look inventory to see there

is data from period you selected. Inventory shows

your weather station name and year and 12 numbers

left to right, those are months, 6th number is june

for example. It shows we have over 83 000

observations available, which quite good amount of

observations. Those months numbers are how many

observation is in month. Usually there is over 1 000

observations in month. This is hourly weather data so

there is hourly weather observation and sometimes

more than 1 observation in hour. After that write

your e-mail and submit your request. This will give

temperature data in celsius degrees. Wait until next

page loads. Now you see your files. First is you data

file, it contains your requested data. You can click

it if it don't load it is not ready yet. it may take

some time to get it ready. You get e-mail when your

data is ready. You can write to that address to

notepad and save it if you don't want to wait. You

can make another request if you want, no need to wait

when your request is ready. Inventory shows your

station and time data which you requested. Station

list shows station you choosed. Now let's look

temperature data. It is text file, third from left is

date and then hours and minutes. Remember what i told

earlier about dates? They are not local times. Then

there is observation type. Now let's look Surface

Data Hourly Global format documentation, it is last

file on site, if you didn't close it. This explain

what are those information on your data. FM-12 is

hourly weather. FM-15 is routinely data many times 3

hours interval, those might have maximum and minimum

temperature data. Those 2 are calculated to statistic

as they are regular on their times. Sometimes we have

FM-16 observation too, they are special weather

report. Those are not calculated to statistic, if i

figured it right. Those are sometimes reported when

there is rain, or other things occuring which would

need more often observation in airport.

You can get this data to Excel if you want so you can

make calculations. You can't copy it to Excel as all

data goes A1 column. In your data save it .TXT file.

For example weather.TXT . Write txt in big character.

Then open Excel and open your file which you just

saved. Excel ask what you want to do with file.

Choose that way what makes difference is comma and

next choose comma and then ready. Now your data is

that way you can use it in Excel. It have . in

temperature go to edit and replace . with this to

this , so you can calculate temperatures, replace all

of them. Then you can calculate them. Now we can look

simplified option above mentioned address.

Let's choose simplified option. Then coutry United

States. Then Florida. Then Miami international

airport. Then choose time range you want to get

data. Next check inventory same way as above and then

submit request. This gives text file and HTML file

when it is ready. This gives temperature in

fahrenheit degrees. HTML file can be directly copy to

Excel, text file is same but without form. Those are

same data as above but showed little different way.

Those people in U.S.A. you might like more those

fahrenheit degrees than celsius. Wait when next page

loads. You can leave site, and do another request if

you want, no need to wait your request to be ready.

First link is your HTML files, it have one file for

each month you have, you see them when you click the

link. Text file have probably all your data in one

file. Station have station you choosed. Surface Data

Hourly Global format documentation tells you what

those numbers are and what they mean which is last

link on that site. It have temperature, dew point,

wind direction, wind speed, wind gust, sea level

pressure, snow depth, maximum and minimum

temperature.

I forgot to say about extreme air temperature are not

alwayss from 24 hour period time, look how many hours

is calculated to it. Also 24 hour is not alwayss

calendar day from 00:00 23:59. In U.S.A. eastern time

time 4:59 24 hour period is calendar day because that

is last minute in that day U.S.A. eastern time for

example Miami, U.S.A.

http://www.sercc.com/nowdata.html

Now lastly look NOwdata. This site have U.S.A.

weather forecast office. They have weather data.

Select place which is near location you want to have

weather data. Let's look Miami, let's click Miami.

Then you have NOWdata open. Now you can select Miami

international airport data or Miami area data and

then select daily data to get temperature data.

Select from those products and options your time and

you can look yourself the data. It have temperature

data.

Hopefully this is helpul someone and liked data i

found to you. Those are data i found on internet to

have weather data.


Follow-Up Postings:

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RE: Weather data

Or you could just look out the window.


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RE: Weather data

Ricky -
Almost fell off my chair laughing
Perfect response!


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RE: Weather data

Fawnridge hi

You can look out of window to see current weather. It is little hard to see from window whart was weather say someday in year 2008.

I got little hurry in my message. About extreme air temperature, i checked Miami, Florida U.S.A. weather data. On pr column is period time in hours of which maximum and minimum temperature was taken. There is many maximum and minimum temperature taken in one day time. Maximum and minimum taken in time 04:59 is summary of the day which is normal time Miami, Florida, U.S.A. last minute in day and period of time is 24 hours so it contains maximum and minimum temperature from previous day. If you remember times are GMT, not local times so that time is 23:59 in Miami, Florida, U.S.A. local time on previous day what date is text. So 20140625 day is summary of the day 24 day of june 2014 in Miami, Florida U.S.A. On columns M is maximum temperature and N is minimum temperature. Number after that character is the temperature, so after M next number is the maximum temperature. You can read pr time this way if it is for example 12.0 which means during past 12 hours ending date and time which are in date and hr mn column maximum and minimum temperature was this and this. Note time which maximum and minimum was recorder might have been on 2 days local time. If you think how you can know which day the maximum temperature occured, i think you can't be sure, but you can try compare it to weather data or use common sense.

On NOWdata have U.S.A. weather data. It have Miami, Florida U.S.A. temperature data from 1895. Those have daily data, temperature graphics. You can select them and choose dates and see the data.


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RE: Weather data

I love weather data! Thanks for the info.


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RE: Weather data

Karin_mt hi

Good you found this information useful to you.


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RE: Weather data

Alternately you could buy your own weather station and have it send your weather info to the wunderground every 10 minute update intervals. My weather station is KFLFLORA5 and gives me the info on my computer in real time at my farm and archives all my weather records going back to initial installation.

Lou

Here is a link that might be useful: Lou's weather


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