Frost Reports: 09th October 2004 ->

[J10]

This is a new feature for 2004/2005, where members report any frost that they have had overnight.

There are 2 reasons why we have done this.

1. Snow is probably not likely in many areas for a while.

2. Frost is more common than snow.

It may be also be an idea for members to keep a running total of the frost received this winter, and we may have a frost league Table.

Currently no frosts at my location.

[Guest Mrs murphymoo]

From 9th Oct, no Frosts here :lol:

(was a frost on 7th Oct though )

[Andy Bown]

Yes WF, you live in Redhill.

It amazes me how often Redhill is the coldest nighttime place :-o

What is the reason for this :?:

[Tim B]

Is it in a valley?

As cold air sinks.

I have not seen any frosts this Autumn, I have seen some nice morning condensation though.

[Paul Sherman]

No Frosts yet in Rayleigh Essex, lowest nighttime minimum of 5.2c a few weeks back.

Paul Sherman

[Kent Snow]

One slight frost in East Kent a few weeks back, but none in my part of Essex.

[Great Plum]

Is it in a valley?

As cold air sinks.

I have not seen any frosts this Autumn, I have seen some nice morning condensation though.

Well it's on the South side of the North Downs and in Earlswood there is the greensand ridge so yes it is in a slight valley, so nothnig very special... I don't know why it gets so cold there...

[Dave J]

Redhill in Surrey is in a frost hollow so the as the air cools in the surrounding area by radiating energy out to space the coldest of this is much denser and so flows down into valleys and pools there resulting in a much lower temperature at that particular point. The redhill site is also I believe on a sandy soil which has a very low specific heat capacity (the lower - the easier the heat is lost and also gained). The oceans have a very high specific heat capacity leading to a much slower change in temperature here...

[Dave J]

Redhill in Surrey is in a frost hollow so as the air cools in the surrounding area by radiating energy out to space the coldest of this is much denser and so flows down into valleys and pools there resulting in a much lower temperature at that particular point. The redhill site is also I believe on a sandy soil which has a very low specific heat capacity (the lower - the easier the heat is lost and also gained). The oceans have a very high specific heat capacity leading to a much slower change in temperature here...

[Dave J]

Redhill in Surrey is in a frost hollow so as the air cools in the surrounding area by radiating energy out to space the coldest of this is much denser and so flows down into valleys and pools there resulting in a much lower temperature at that particular point. The redhill site is also I believe on a sandy soil which has a very low specific heat capacity (the lower - the easier the heat is lost and also gained). The oceans have a very high specific heat capacity leading to a much slower change in temperature here...

[Hywel]

That sound a lot like Yr Wyddgrug, it is build on mainly glacial sand deposits and coal measures, and is in a bowl shaped valley with two very narrow openings. The valley ranges from an altitude of around 110m ASL to 150m ASL and is surrounded by steep hills from 200m ASL to 350m ASL. The town is very prone to hard frosts and thick fog. Driving out of the town to the 200m mark it often warms up a couple of degrees and in foggy conditions can be completely clear up there. This morning it was 3C at 07:30 and it was 5-6C 2 miles east out of the valley at a height of about 180m ASL

[Great Plum]

Redhill is on greensand so yes, it is on sandstone....

[Ross B]

I believe i have had 4, altho are we talking about ground frosts or air frosts?

[Andy Bown]

Redhill in Surrey is in a frost hollow so as the air cools in the surrounding area by radiating energy out to space the coldest of this is much denser and so flows down into valleys and pools there resulting in a much lower temperature at that particular point. The redhill site is also I believe on a sandy soil which has a very low specific heat capacity (the lower - the easier the heat is lost and also gained). The oceans have a very high specific heat capacity leading to a much slower change in temperature here...

Thank you Dave for explaining the reasons so well

Even in summer Redhill is regularly the coldest overnight recording :!:

[Kent Snow]

Thank you Dave for explaining the reasons so well  

Even in summer Redhill is regularly the coldest overnight recording :!:

Indeed Andy i've always wondered why Redhill was a cool spot and now i know why!

[Kent Snow]

An overnight low of 2.2C, gave a layer of ice over my windscreen this morning, plus some grass frost.

[Andy Bown]

I have been speaking to a trusted friend this evening.

She lives in a low lying nearby village called Dilton Marsh.

There was frost on the cars yesterday morning (Oct 19th).

I had recorded a min of 5c so I would expect that village to be a little lower.

[Guest Mrs murphymoo]

Overnight minimum of 0.4c - a wee frost this morning

[Kent Snow]

Another frost this morning. Recorded a low of 2.8C, which left a glassy sheet of ice on my car, plus frost of the grass.

[PB22]

A low of 2.7C here gave a ground frost this morning.

[PB22]

A slight ground frost here this morning, air minimum of 3.2C.

[Andy Bown]

Lovely :lol:

1st frost of the season this morning <_<

Temp was 0c at 0800.

[johnholmes]

Hi

yep a touch of ground frost this morning before the cloud arrived for the next weather system. Min temp down to 2.5C

[Snow_Fan_Man]

This aint fair, im still waiting for my first frost <_<

[Jackfrost]

A noticeable frost this morning. A temperature of 1.7C at just gone midnight. <_<