Rydych chi wedi bod yn anfon adroddiadau tywydd cymysg iawn i fi dros yr wythnosau diwethaf! Cwympodd llawer o eira mewn rhai ysgolion, ond dim mewn ysgolion eraill. Da iawn chi i gyd am anfon eich adroddiadau drwy gydol y tywydd rhewllyd.

Eira mân eira mawr …

Dyma nifer o ysgolion yn cofnodi eira…St. Mary's Catholic Primary School, Ysgol Bwlchgwyn, Ysgol Gynradd Glyncollen, Stanford in the Vale Primary School, Thorneyholme RC Primary School, Coppull Parish Primary School, Freuchie Primary School, Balcurvie Primary School, Ysgol yr Eglwys yng Nghymru Gladestry ac RAF Benson Primary School.

Dyma rhai ysgolion yn dweud wrtha i eu bod nhw ar gau oherwydd yr eira... Manor Primary School, St Joseph's Primary School, Ysgol Gynradd yr Eglwys yng Nghymru Henllys, Ysgol Nant Y Coed, Ysgol Gynradd Rhydypennau ac Ysgol Gynradd Rogiet!

Dyma rhai ysgolion yn gweld ychydig bach o eira, neu ddim eira o gwbl... Diolch i Stepping Stones Short Stay School ac Ysgol Iau Aberdaugleddau am eich adroddiadau.

Ers yr eira, mae nifer o ysgolion wedi cofnodi gwyntoedd uchel, stormydd a llawer o law, ond wrth edrych drwy’r ffenest galla i weld yr haul yn tywynnu – dyna dywydd amrywiol mewn ychydig wythnosau! Mae’r egin cennin Pedr a crocws talaf yn yr ardd yn 7cm o daldra erbyn hyn. Pa mor dal yw eich egin chi?

Cyngor Craff mewn tywydd rhewllyd: Os oes eira neu rew yn eich mesurydd glaw, dewch ag e i’r ystafell ddosbarth i doddi cyn cofnodi. Cofiwch arllwys y d?r allan ar ôl iddo doddi a’i roi yn ôl y tu allan!

Eich cwestiynau, fy atebion:

St Joseph's Primary School (Penarth) Our school was closed last Friday because of snow so we couldn't get in to check on our freezing bulbs. We have noticed, however, that one of our bulbs has started growing whilst the others are snug underneath the compost in their pots. We tried to think about why this might have happened and wondered whether it is because that particular bulb was planted by you, Prof. Plant and maybe you have encouraged it to grow!?    We are pleased to see that the weather has got a bit warmer and are hoping that this means that our bulbs will start to grow. We are very keen to see them flowering!  Prof P: Thanks St Joseph’s! Well, I am very green fingered! It’s very exciting waiting for your flowers to arrive isn’t it?

Rogiet Primary School The bulb pots were full of snow this week, we were worried they would die but Mrs Carter said they would be all right!  Prof P: Don’t worry, Mrs Carter is right, they are very hardy little plants so I’m sure they will be okay.

Ysgol Nant Y Coed We are sorry for sending the records late because school was closed because of the snow last Friday.  Prof P: No problem! Thank you for sending them in when you could.

Stanford in the Vale Primary School Wow... what a bitter cold week, and all the snow we have had! All our bulbs are completely covered in snow... and more snow is expected tonight! Monday's snow/rainfall was frozen, so we brought the recordings inside and allowed to melt! (We hope this was the correct thing to do!) :-)  Prof P: Well done Stanford in the Vale that was exactly the right thing to do!

Gladestry C.I.W. School We have started measuring the few bulbs that have come out. The daffodils and mystery bulbs have come out; we think the mystery bulbs are snowdrops, as they have grown very fast.  Prof P: That’s a very good guess!Keep watching them and let me know if your guess is right.

Balcurvie Primary School One of the extra bulbs that we planted in a pot and left it in the classroom has began to sprout! We were all very excited. We have also had a very wet week!  Prof P: That is exciting Balcurvie! I hope you enjoy watching it grow. I wonder when your outdoor bulbs will catch up?

SS Philip and James Primary School We thought it went well except we forgot to pour out the water once so we counted the amount of water added on the next day. We enjoy doing it, Phil and Jim Team.  Prof P: That’s okay, thanks for letting me know and keep up the good work. I’m glad you’re enjoying it.

Ysgol Y Ffridd Dim Record Dydd Iau oherwydd ysgol wedi cau (Dim Dwr yn yr ysgol).  Prof P:  Athro’r Ardd: Diolch am y wybodaeth gan Ysgol Y Ffridd. Gobeithio bod y d?r wedi trwsio erbyn hyn.

Darran Park Primary 42 of the bulbs have sprouted.  Prof P:  Gosh that’s a lot! Well done Darran Park Primary.

Ysgol Porth Y Felin To pp, plants are all ok the temperature rised alot on Tuesday! there was a storm on Saturday night so there was loads of rain on Monday. Happy planting!!!  Prof P: Great reporting Ysgol Porth Y Felin, hopefully all that rain will help your plants to grow.

Rhydypenau Primary School A very interesting week of weather!  Prof P: I agree!

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Athro’r Ardd

Mae’r crocws yn dechrau blodeuo ddiwedd mis Ionawr, felly bydd eich planhigion chi’n blodeuo unrhyw ddiwrnod! Am gyffrous! Cofiwch edrych ar eich planhigion crocws bob dydd i weld os yw’r blodau wedi agor a chofnodi’r dyddiad a thaldra’r planhigyn.

Bydd blodyn y crocws yn borffor gydag anther a stigma oren (y rhannau yng nghanol y petalau). Gallan nhw dyfu i daldra o 10cm.

Peidiwch â phoeni os nad yw’r blodau wedi ymddangos eto! Bydd y tywydd oer a’r eira dros yr wythnosau diwethaf wedi arafu’r broses. Wrth i’r tymheredd gynhesu gall y blodau ymddangos yn sydyn, felly cadwch lygad arnyn nhw!

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Artho'r Ardd

Hiâ Cyfeillion Bylbiau!

Rwy'n amau y bydd llawer o'n potiau o dan eira ar gyfer y dyddiau nesaf! Bydd hyn yn golygu y bydd llawer o ysgolion ar gau. Os ydych yn cael eira rhowch nodyn yn yr adran sylwadau pan fyddwch yn anfon eich cofnodion tywydd.

Dilynwch y ddolen hon i weld yr holl gofnodion tywydd sydd wedi cael eu hanfon i'r graddau. Dewiswch ysgol, yna 'tywydd'.

Dyma rai lluniau o fy egin. Byddwch yn gweld bod y rhai wnes i blannu yn hydref 2011 wedi tyfu llawer mwy na'r rhai wnes i blannu hydref 2012.

Os oes gennych egin yn barod, cymerwch olwg ar fy lluniau i helpu gweithio allan beth yw beth.

Dyma fideo sy'n dangos sut y bydd eich egin yn tyfu.

Eich cwestiynau:

St Mary's Catholic Primary School: We have no records for Monday because it was an inset day. Some of our daffodil bulbs have come through the soil. We have taken photographs and will send them by e-mail. Prof.P: I look forward to seeing them St.Mary’s.

Ladybank Primary School: Thank you for our new thermometer! Prof.P: No worries, thanks for letting me know it arrived safely.

Glyncollen Primary School: Our bulbs have started to grow over the holidays. We hope the frost doesn't get to them. Yr.4. Prof.P: Don’t worry year 4, they are quite tough.

SS Philip and James Primary School:
Happy New Year!  A few daffodil shoots are peeping out of the ground and in one or two pots. Quite a few shoots are emerging in the 'Mystery Bulbs' pot and they are a red/green colour compared to the daffodils shoots which are green. Prof.P: How exciting, not seen my mystery bulb shoots yet.

Greyfriars RC Primary School:
Some are sprouting already! All is good. I am really enjoying this project! Prof.P: glad to hear the bulbs are starting to grow and that you are enjoying.

St Joseph's Primary School (Penarth)
Happy New Year Prof.Plant. We have started to notice a few green shoots in some of our pots and are very excited about the plants beginning to grow. We have talked about the weather forecast for next week and think that we may be sending you photos of snow covered pots! (St. Joseph's Primary School, Penarth.) Prof.P: Yes you were right. Some snow in Cardiff but not enough!

Rhydypenau Primary School:
when we got back to school after the Christmas holidays, our rainfall gauge was full, so we must have had a lot of rain in a fortnight. Prof.P: Yes, we had lots of rain over the holidays – a bit too much! Many people had flooding which must have been awful at Christmas.

Henllys CIW Primary:
Some shoots but no flowers. Prof.P: The flowers will come soon.

Auchtertool Primary School:
When we came back from our Christmas break some of our bulbs were showing growth - not only the ones in pots but also some of those we had planted in the ground! Prof.P: Excellent news!

Ysgol Porth Y Felin:
hello p.p the plants are growing quite quickly but we didn't write down Monday because of teacher training. Prof.P: Thanks for letting me know.

Ysgol Nant Y Coed:
This week the bulbs have started to grow, mostly the mystery bulb. The weather was warm at the beginning and at the end it was cold. Prof.P: Great update, Nant Y Coed.

Tynewater Primary School:
We had 50mm of rainfall on Tuesday because we had been on holiday for two weeks and nobody had emptied the rain gauge. Prof.P: Yes, mine was the same. Thanks for noting the reason.

Blwyddyn Newydd Dda - Gwyddonwyr Gwych! Gobeithio chi wedi cael siawns i ymlacio a nawr yn barod i ymchwilio!

Ar yr adeg hon o'r flwyddyn pethau'n dechrau mynd yn gyffrous iawn. Nawr yw'r amser i wylio eich potiau i weld os oes unrhyw beth yn dechrau tyfu. Mae fy egin cennin Pedr eisoes wedi ymddangos! Danfon llun i mi os mae eginech chi wedi dechrau ymddangos.

Gallai gymryd mis arall neu hyd yn oed chwe wythnos tan fy mlodau yn ymddangos. Mae'r cyfan yn dibynnu ar ein tywydd - os yw'n troi'n wirioneddol oer, yna bydd y twf yn arafu. Os bydd yn aros yn gynnes byddant yn tyfu yn gyflymach.

Y cam nesaf... Defnyddiwch y cyflwyniad PowerPoint i ddarganfod sut i gadw cofnodion blodau. Cofiwch fod yn rhaid i bob un ohonoch roi gwybod i mi pan fydd eich blodau ar agor er mwyn derbyn eich Tystysgrif Gwyddonwyr Gwych.

2012 oedd yr ail flwyddyn wlypaf ar gofnod yn y DU a'r gwlypaf erioed yn Lloegr, y Swyddfa Dywydd gyhoeddi.

Mae'r glaw a oedd yn achosi mwy na 8,000 o gartrefi a busnesau i ddioddef llifogydd arwain at gyfanswm o 1,330.7 mm o law ar gyfer y flwyddyn, dim ond 6.6mm byr o'r flwyddyn y DU gwlypaf a gofnodwyd yn 2000 (1337.3mm).

Dadansoddiad gan y Swyddfa Dywydd yn awgrymu y gall y DU yn mynd yn fwy gwlypach fel newid yn yr hinsawdd yn achosi aer cynhesach i gario mwy o dd?r. Dyddiau o law eithafol - glaw disgwyliedig unwaith bob 100 diwrnod - wedi digwydd bob 70 diwrnod yn 2012. Am ragor o wybodaeth am hyn gweler adroddiad hwn gan y Guardian.

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Athro’r Ardd

Ni allaf gredu ei fod ond ddeuddeg cwsg tan Nadolig! Rwyf wedi anfon cerdyn Nadolig atoch chi gyd yn y post. Ddiolch i chi gyd am y gwaith caled rydych wedi ei wneud hyd yn hyn.

Dyma'r chweched wythnos a'r olaf o gofnodi tan Ionawr felli Nadolig Llawen oddi wrth Bwlb bychan a fi.

Rwyf wedi mwynhau'r holl sylwadau a chwestiynau dwi wedi cael yn ystod y flwyddyn hon ac yn edrych ymlaen at ateb mwy yn y Flwyddyn Newydd.

Wyf yn gobeithio bod chi gyd yn cael gwyliau gwych ac yn dychwelyd ym mis Ionawr yn awyddus i weld sut mae eich bylbiau yn ei wneud. Os ydych yn pryderu efallai na fydd eich bylbiau yn ddiogel dros y Nadolig, mynd â nhw adref gyda chi - ond cofiwch fod yn rhaid iddynt gael eu cadw y tu allan!

Mae'r tywydd wedi bod yn oer iawn mewn mannau yn ystod yr wythnos neu ddwy ddiwethaf, ond rhagwelir y bydd yn cael cynhesach. Adroddodd Ysgol Harwell -10 ° c ddydd Iau diwethaf. Oer iawn yn wir! A allwch chi gadarnhau hyn yn gywir?

Fy hoff garol Nadolig yw'r 'Holly and the Ivy' oherwydd ei fod yn cynnwys dau o'n planhigion bytholwyrdd brodorol. Roedd y Celtiaid yn defnyddio planhigion hyn i ddathlu Byrddydd y Gaeaf ac wrth gwrs y maent yn cael eu defnyddio gan Gristnogion i ddathlu'r Nadolig.

Os nad ydych yn gwybod ei fod yma yn y geiriau: http://www.carols.org.uk/the_holly_and_the_ivy.htm

Eich cwestiynau, fy atebion:

Greyfriars RC Primary School: We are really enjoying this! Prof.P: So glad to hear it!

DarranPark Primary: There aren't any signs of growth yet. Prof.P: Give it time; you should see something in January.

GlyncollenPrimary School: We have seen a pattern in our temperatures this week. We have also found out a way to stop our rain gauge from falling over. We hope we don't have any snow next week. From Glyncollen year 4 Prof.P: Great to hear you are seeing patterns in your weather data and that you have found a way to stop your rain gauge from falling over. Please let me know how you do it?

BalcurviePrimary School: We have had a lot of ice this week and freezing temperatures. We also had snow over last weekend and on Thursday. Prof.P: I hope it gets warmer for you at the weekend!

St Joseph's Primary School (Penarth): We have noticed how much colder is has got this week. There has been some ice on our plant pots and we feel really sorry for the poor bulbs! Prof.P: Don’t worry too much I’m sure they will be fine.

KilmaronSpecialSchool: Records for rainfall on days with negative temperatures may not be correct as the water had frozen and expanded so reading may be higher than actual water collected Prof.P: Thanks for letting me know Kilmaron; I will make a note of it. If it happens again melt it before you measure. Thanks

Ysgol Pencae: It rained cats and dogs on Friday and was milder. Did it rain more in Cardiff? Prof.P: We only had 10mms of rain in Cardiff a quarter of what you recorded!