South West and Central Southern England Regional Weather Discussion 21/05/2018 Onwards

[Steve_in_Wembury]

Good Morning everyone (maybe afternoon by the time the post is moderated?)

I thought I'd say hello so that I don't feel so much of a stranger when (hopefully) things get exiting later in the year!

New account this year as I foolishly signed up via facebook last year and it's hogged my username and display name.

Glorious day so far in Wembury.  Clear blue skies in all directions and a light breeze moving the thinnest of branches.  Currently 10c in still air from a low of 1.7c at 7am.

I missed most of the thunder on Halloween.  I thought it was fireworks, as I live near a wedding venue; but when the downpour caught my attention I caught the tail end.

Here's to a good season for one and all.

[wimblettben]

Another sub-zero night here last night with a low of -3.2C.

Clear weather currently with a temperature of +3.2C.

[Paul]

32 minutes ago, Steve_in_Wembury said:

Good Morning everyone (maybe afternoon by the time the post is moderated?)

I thought I'd say hello so that I don't feel so much of a stranger when (hopefully) things get exiting later in the year!

New account this year as I foolishly signed up via facebook last year and it's hogged my username and display name.

Glorious day so far in Wembury.  Clear blue skies in all directions and a light breeze moving the thinnest of branches.  Currently 10c in still air from a low of 1.7c at 7am.

I missed most of the thunder on Halloween.  I thought it was fireworks, as I live near a wedding venue; but when the downpour caught my attention I caught the tail end.

Here's to a good season for one and all.

You can just login using the facebook login button to get back to that account  

[Mapantz]

A hard frost this morning, down to -1.3°C. Currently blue skies and 11.5°C.

[Nights King]

47 minutes ago, Mapantz said:

A hard frost this morning, down to -1.3°C. Currently blue skies and 11.5°C.

I thought it had to be below -4c for it to be called a hard frost?

I love love these frosty mornings though, it has been a few years since we have had so many frosty days early in autumn. 

[matt111]

Not quite low enough for another air frost last night with a low of 0.5°C but still a frosty start to the day. Mostly sunny now. 11.3°C

[Mapantz]

21 minutes ago, Nights King said:

I thought it had to be below -4c for it to be called a hard frost?

I didn't think there was an exact figure behind it? I've had sub-zero temps with no frost plenty of times, but this morning, the soil and lawn were very hard, thick ice on cars & white over everything. In contrast to Wednesday, sheds were white, but the lawn and soil were still soft despite getting down to -2.3°C.

Edited November 2, 2018 by Mapantz

[Nights King]

9 minutes ago, Mapantz said:

I didn't think there was an exact figure behind it? I've had sub-zero temps with no frost plenty of times, but this morning, the soil and lawn were very hard, thick ice on cars & white over everything. In contrast to Wednesday, sheds were white, but the lawn and soil were still soft despite getting down to -2.3°C.

I always thought a frost was defined by the temperature and not the visible frost/rime or how hard the ground is etc.

 

Found this on wiki -

• slight frost: 0 to −3.5 °C (32.0 to 25.7 °F)
• moderate frost: −3.6 to −6.5 °C (25.6 to 20.3 °F)
• severe frost: −6.6 to −11.5 °C (20.2 to 11.3 °F)
• very severe frost: below −11.5 °C (11.3 °F)

Edited November 2, 2018 by Nights King

[Mapantz]

7 minutes ago, Nights King said:

I always thought a frost was defined by the temperature and not the visible frost/rhime or how hard the ground is etc.

 

Found this on wiki -

• slight frost: 0 to −3.5 °C (32.0 to 25.7 °F)
• moderate frost: −3.6 to −6.5 °C (25.6 to 20.3 °F)
• severe frost: −6.6 to −11.5 °C (20.2 to 11.3 °F)
• very severe frost: below −11.5 °C (11.3 °F)

I can rule that out completely in my opinion, more so for my location. It does say subjective. -3.5°C or below is rare to get here even in Winter (Only 5 times in 3 years) and they class that as a slight frost - no way was it a slight frost here.

Edited November 2, 2018 by Mapantz

[MP-R]

Not saying this is the case here, but the number of times I hear people saying there's a hard frost because it's really visible when in fact it might only be -1C. Yet it can be invisible but actually it's -7C eg during the beast last Feb.

Either way, the 'moist' frosts are always the photogenic ones, and what a cracking day today, especially to be in Wells for business.

[Nights King]

4 minutes ago, MP-R said:

Not saying this is the case here, but the number of times I hear people saying there's a hard frost because it's really visible when in fact it might only be -1C. Yet it can be invisible but actually it's -7C eg during the beast last Feb.

Either way, the 'moist' frosts are always the photogenic ones, and what a cracking day today, especially to be in Wells for business.

Yes I completely agree.

By most peoples standards a frost has to be 'white' and it bugs me if I tell them its going to be a hard frost and they say next day "well we didnt get a frost" and I will be thinking but it is -7c outside of course it is a frost. 

[Lyn-M]

First October since 2010 when we had an air frost in that month, -0.1°C on 29th, exactly 0°C on 30th and -0.6°C on 31st.  This morning it was -1.1°C, currently 11.0°C, still sunny, not much breeze.  Taking advantage and going for a walk.

[Nights King]

18 minutes ago, Mapantz said:

I can rule that out completely in my opinion, more so for my location. It does say subjective. -3.5°C or below is rare to get here even in Winter (Only 5 times in 3 years) and they class that as a slight frost - no way was it a slight frost here.

I would call it a light frost though, working with plants most of the half hardy plants will be fine with a light frost its when you drop down to the -4/5c that you start to lose tender perennials and see real damage.

Only got down to -0.9c here but looked quite pretty.

Edited November 2, 2018 by Nights King

[CheesepuffScott]

Another forecast for thunder that will end up disappearing in a few hours like last time 

[Nights King]

First ground frost of the season to survive in the shade here today 

[Frosty hollows]

2 hours ago, Nights King said:

Yes I completely agree.

By most peoples standards a frost has to be 'white' and it bugs me if I tell them its going to be a hard frost and they say next day "well we didnt get a frost" and I will be thinking but it is -7c outside of course it is a frost. 

Quite. You can't see it, but it's there all right.  Ask any gardener! In contrast, we were barely -1c a couple of mornings ago and it looked stunning, but the digger doing our trenches cut through it like butter. -3.5c again here overnight but had our first icy roads this morning, even on the main road

[Mapantz]

3 hours ago, Nights King said:

By most peoples standards a frost has to be 'white' and it bugs me if I tell them its going to be a hard frost and they say next day "well we didnt get a frost" and I will be thinking but it is -7c outside of course it is a frost. 

I didn't say it doesn't need to be white, but basing the severity of a frost by a temperature scale isn't particularly accurate, especially by geographical location, hence why it says subjective. It was most certainly a hard frost here, regardless of it being -1.3°C.

Edited November 2, 2018 by Mapantz

[jethro]

It's been a glorious day here. Was working all day on a south facing border that's backed by a 10ft high stone wall, so warm in the sunshine I ended up working in a t shirt. Temperature already dropping like a stone now, currently 4.7c according to wunderground and falling.

[Nights King]

1 hour ago, Mapantz said:

I didn't say it doesn't need to be white, but basing the severity of a frost by a temperature scale isn't particularly accurate, especially by geographical location, hence why it says subjective. It was most certainly a hard frost here, regardless of it being -1.3°C.

I understand what your saying with it being unusual for you but I would have thought temperature is only way to categorize the severity especially if we are looking at it statistically speaking?

Obviously how damaging a frost is depends on weather it is radiation frost or just a cold windy day with an ambient temperature below freezing but that aside surely we cant changes the parameters due to location?

For example if Florida gets a ground frost we cant call it a severe frost just because it is rare? Surely they just experience light frosts no matter how damaging it may be to my orange juice price?  

 

Edited November 2, 2018 by Nights King

[ThundersnowDays]

-3.2 here last night :) 

[matt111]

After dropping to 4.1°C less than an hour ago it's suddenly shot back up to 8.2°C and still rising quickly.

[dancing daisy]

Evening my furry little winter friends

[matt111]

Up to 11.0°C now, getting close to being the warmest part of the 'day'. 

[Mapantz]

29 minutes ago, matt111 said:

Up to 11.0°C now, getting close to being the warmest part of the 'day'. 

That was quite an increase in temps here..

 

[matt111]

45 minutes ago, Mapantz said:

 That was quite an increase in temps here..

 

Yes I don't remember seeing such a rapid rise in temperature recently if at all. Just looked back and at 8pm it was 3.5°C and at 10pm it was 10.2°C. Since then it's slowed but still rising very slowly now, currently 11.1°C.

Edited November 3, 2018 by matt111