Llifogydd

Yr wythnos hon wedi gweld llifogydd ar draws llawer o ardaloedd yn y DU - gweler y lluniau yn y dolenni isod. Adroddodd Ysgol Stepaside lifogydd yn uchel mewn sawl ardal.

Rwy'n amau y bydd rhai ysgolion ar gau heddiw ac efallai ddim yn gallu danfon eu cofnodion. Wyf yn gobeithio y bydd pawb yn ddiogel ac yn sych.

Yn fy ngardd cawsom 30mm o law ddydd Mercher ac roedd rhaid i mi achub broga a oedd yn hopian ar hyd ffordd brysur ar fy ffordd adref! Adroddodd Ysgol Harwell 15mm o law a Ysgol Rhydypenau yng Nghaerdydd a Ysdol Balmerino tu allan i Dundee 30mm o law!

• Cymru - http://www.bbc.co.uk/news/uk-wales-20458267
• Yr Alban - http://www.bbc.co.uk/news/uk-scotland-20439824
• Lloegr - http://www.bbc.co.uk/news/uk-england-devon-20441316

Wythnos diwethaf roedd 57 o ysgolion wedi danfon eu cofnodi tywydd - diolch yn fawr i chi gyd!

Astudiwch y cofnodion. Os hoffech gweld faint o law mae pawb wedi cael, dilynwch y ddolen hon ac yna dewiswch yr ysgol yr hoffech ei astudio. Gwnwech yn siwr bod eich cofnodion yn cael eu dangos yn gywir a gadewch i mi wybod os oes unrhyw broblemau.

Eich cwestiynau, fy atebion:

RAF Benson Primary School: We would like to send our records on a Thursday as it is the evening of our gardening club. Prof.P: No problem, doing it like this, but as the web site is set-up to only allow you to send in a week of weather at a time, you will only be able to upload the weather from the week before. Thanks.

Medlar with Wesham CE Primary School: Why aren't our bulbs growing yet we are impatient. Prof.P: they will be growing - but under the ground. Ask your teacher if you could grow one of your spare bulbs in a clear gel so you can watch the roots growing, but you must be patient. If they grew above the soil now they could be harmed by the winter frost.

Ysgol Porth Y Felin: We are interested by the fact that all the temperatures are nearly the same and it only rained on Monday. Prof.P: My temperatures have been fairly similar too, temperature wise it is very mild at the moment. Test if your thermometer definitely working properly?

Westwood CP School: Cold day on Friday! We had a little shower. That is the 1mm of rainfall. Prof.P: great accurate recording Westwood!

Diolch yn fawr

Athro'r Ardd