Home |
Search |
Today's Posts |
![]() |
|
uk.sci.weather (UK Weather) (uk.sci.weather) For the discussion of daily weather events, chiefly affecting the UK and adjacent parts of Europe, both past and predicted. The discussion is open to all, but contributions on a practical scientific level are encouraged. |
Reply |
|
LinkBack | Thread Tools | Display Modes |
#1
![]() |
|||
|
|||
![]()
The temperature on my AWS in Wanstead, east London, fell to a low of
2.7C at 0718z today, by 0738z it had risen to 4C. Is this normal for the time of year? I would normally put it down to solar radiation but there is thick low cloud here. Also on the ride home from central London last night I noticed thick patchy fog had formed over Wanstead Flats - quite unexpected from the forecast - and the air also "felt" colder than I was expecting it to be from the forecast. My wife remarked that the air outside felt very "cold - colder than it should do" as she walked the girls in this morning - anyone else notice anything strange... Are these phenomena cause by us being slap bang underneath a high pressure? It would be interesting to see how low the usual frost hollows got last night - Chipstead Valley in Surrey, Benson, Oxon etc |
#2
![]() |
|||
|
|||
![]()
In article
, Scott W writes: The temperature on my AWS in Wanstead, east London, fell to a low of 2.7C at 0718z today, by 0738z it had risen to 4C. Is this normal for the time of year? I would normally put it down to solar radiation but there is thick low cloud here. Also on the ride home from central London last night I noticed thick patchy fog had formed over Wanstead Flats - quite unexpected from the forecast - and the air also "felt" colder than I was expecting it to be from the forecast. My wife remarked that the air outside felt very "cold - colder than it should do" as she walked the girls in this morning - anyone else notice anything strange... Are these phenomena cause by us being slap bang underneath a high pressure? It would be interesting to see how low the usual frost hollows got last night - Chipstead Valley in Surrey, Benson, Oxon etc Doesn't it generally feel colder in fog, because the air is damp against the skin? -- John Hall "The power of accurate observation is commonly called cynicism by those who have not got it." George Bernard Shaw |
#3
![]() |
|||
|
|||
![]()
On Mar 12, 10:01*am, Scott W wrote:
The temperature on my AWS in Wanstead, east London, fell to a low of 2.7C at 0718z today, by 0738z it had risen to 4C. Is this normal for the time of year? I would normally put it down to solar radiation but there is thick low cloud here. Also on the ride home from central London last night I noticed thick patchy fog had formed over Wanstead Flats - quite unexpected from the forecast - and the air also "felt" colder than I was expecting it to be from the forecast. My wife remarked that the air outside felt very "cold - colder than it should do" as she walked the girls in this morning - anyone else notice anything strange... Are these phenomena cause by us being slap bang underneath a high pressure? It would be interesting to see how low the usual frost hollows got last night - Chipstead Valley in Surrey, Benson, Oxon etc =============================== A slight puff of wind would induce some mixing which might account for the 20 minute temperature rise but a bit of incoming radiation wouldn't hurt either. Relatively moist air under high pressure in early spring with plenty of overnight radiation = ideal conditions for stratus and fog (so I'm not sure how unexpected it was - any forecast that didn't mention fog was not a good one!) I can't comment much on the physiological aspects (how cold it "felt"). But Benson's minimum was +0.9, Farnborough's +0.6, Charlwood's -0.1 and Chesham's -0.8. For comparison, High Wycombe's minimum was +4.1 and Kenley's +4.7. Fog/low cloud formation prevented greater falls in temperature, and it may develop earlier tonight so it might be less cold. Stephen. |
#4
![]() |
|||
|
|||
![]()
Scott W wrote:
The temperature on my AWS in Wanstead, east London, fell to a low of 2.7C at 0718z today, by 0738z it had risen to 4C. Is this normal for the time of year? I would normally put it down to solar radiation but there is thick low cloud here. Also on the ride home from central London last night I noticed thick patchy fog had formed over Wanstead Flats - quite unexpected from the forecast - and the air also "felt" colder than I was expecting it to be from the forecast. My wife remarked that the air outside felt very "cold - colder than it should do" as she walked the girls in this morning - anyone else notice anything strange... Are these phenomena cause by us being slap bang underneath a high pressure? It would be interesting to see how low the usual frost hollows got last night - Chipstead Valley in Surrey, Benson, Oxon etc ----------------------------------- Mine went from 4.5C to 6.1C about the same time Scott.Don't forget you can look in any of the other Cumulus websites and click on trends to see if there were similar patterns. Ron's near you levelled at that time and then dropped again. Nevertheless, contrary to Peter Gibbs Countryfile forecast 12 hours earlier it was a cold and grey day with a max of 9C. Dave |
#5
![]() |
|||
|
|||
![]()
Stephen Davenport wrote:
On Mar 12, 10:01 am, Scott W wrote: The temperature on my AWS in Wanstead, east London, fell to a low of 2.7C at 0718z today, by 0738z it had risen to 4C. Is this normal for the time of year? I would normally put it down to solar radiation but there is thick low cloud here. Also on the ride home from central London last night I noticed thick patchy fog had formed over Wanstead Flats - quite unexpected from the forecast - and the air also "felt" colder than I was expecting it to be from the forecast. My wife remarked that the air outside felt very "cold - colder than it should do" as she walked the girls in this morning - anyone else notice anything strange... Are these phenomena cause by us being slap bang underneath a high pressure? It would be interesting to see how low the usual frost hollows got last night - Chipstead Valley in Surrey, Benson, Oxon etc =============================== A slight puff of wind would induce some mixing which might account for the 20 minute temperature rise but a bit of incoming radiation wouldn't hurt either. Relatively moist air under high pressure in early spring with plenty of overnight radiation = ideal conditions for stratus and fog (so I'm not sure how unexpected it was - any forecast that didn't mention fog was not a good one!) I can't comment much on the physiological aspects (how cold it "felt"). But Benson's minimum was +0.9, Farnborough's +0.6, Charlwood's -0.1 and Chesham's -0.8. For comparison, High Wycombe's minimum was +4.1 and Kenley's +4.7. Fog/low cloud formation prevented greater falls in temperature, and it may develop earlier tonight so it might be less cold. Stephen. --------------------------- Countryfile with Peter Gibbs didn't handle it too well to be honest. He intimated that temperatures will depend on where the sun breaks through the cloud but never actually mentioned fog or mist. He also said that East Anglia and the S.E would fair well again today with the most sunshine but in fact there was zero sunshine hours today with a late maximum of 9.8C compared to 16.1C. Always a tricky one I know but looking at that small HP stagnated right over us mist and fog was always likely I think. Dave |
#6
![]() |
|||
|
|||
![]()
On Mar 12, 5:14*pm, Dave Cornwell wrote:
Scott W wrote: The temperature on my AWS in Wanstead, east London, fell to a low of 2.7C at 0718z today, by 0738z it had risen to 4C. Is this normal for the time of year? I would normally put it down to solar radiation but there is thick low cloud here. Also on the ride home from central London last night I noticed thick patchy fog had formed over Wanstead Flats - quite unexpected from the forecast - and the air also "felt" colder than I was expecting it to be from the forecast. My wife remarked that the air outside felt very "cold - colder than it should do" as she walked the girls in this morning - anyone else notice anything strange... Are these phenomena cause by us being slap bang underneath a high pressure? It would be interesting to see how low the usual frost hollows got last night - Chipstead Valley in Surrey, Benson, Oxon etc ----------------------------------- Mine went from 4.5C to 6.1C about the same time Scott.Don't forget you can look in any of the other Cumulus websites and click on trends to see if there were similar patterns. Ron's near you levelled at that time and then dropped again. Nevertheless, contrary to Peter Gibbs Countryfile forecast 12 hours earlier it was a cold and grey day with a max of 9C. Dave That's strange, Dave, it was beautifully sunny here from 11.45am. It wasn't terribly warm but was pleasant enough while I was digging the garden. Don't know the max as yet as I left for work just before 3pm - will update later |
#7
![]() |
|||
|
|||
![]()
Scott W wrote:
On Mar 12, 5:14 pm, Dave Cornwell wrote: Scott W wrote: The temperature on my AWS in Wanstead, east London, fell to a low of 2.7C at 0718z today, by 0738z it had risen to 4C. Is this normal for the time of year? I would normally put it down to solar radiation but there is thick low cloud here. Also on the ride home from central London last night I noticed thick patchy fog had formed over Wanstead Flats - quite unexpected from the forecast - and the air also "felt" colder than I was expecting it to be from the forecast. My wife remarked that the air outside felt very "cold - colder than it should do" as she walked the girls in this morning - anyone else notice anything strange... Are these phenomena cause by us being slap bang underneath a high pressure? It would be interesting to see how low the usual frost hollows got last night - Chipstead Valley in Surrey, Benson, Oxon etc ----------------------------------- Mine went from 4.5C to 6.1C about the same time Scott.Don't forget you can look in any of the other Cumulus websites and click on trends to see if there were similar patterns. Ron's near you levelled at that time and then dropped again. Nevertheless, contrary to Peter Gibbs Countryfile forecast 12 hours earlier it was a cold and grey day with a max of 9C. Dave That's strange, Dave, it was beautifully sunny here from 11.45am. It wasn't terribly warm but was pleasant enough while I was digging the garden. Don't know the max as yet as I left for work just before 3pm - will update later ----------------------------- Not realy when you look at the sat pics Scott. All the way from Lincoln, all of East Anglia and East Kent had a dreadful day despite the East being forecast as most likely for sun. You were just about far enough west to get the break in the cloud as did a lot of the South, West and Central England. DAve |
#8
![]() |
|||
|
|||
![]()
On Mar 12, 10:53*pm, Scott W wrote:
On Mar 12, 5:14*pm, Dave Cornwell wrote: Scott W wrote: The temperature on my AWS in Wanstead, east London, fell to a low of 2.7C at 0718z today, by 0738z it had risen to 4C. Is this normal for the time of year? I would normally put it down to solar radiation but there is thick low cloud here. Also on the ride home from central London last night I noticed thick patchy fog had formed over Wanstead Flats - quite unexpected from the forecast - and the air also "felt" colder than I was expecting it to be from the forecast. My wife remarked that the air outside felt very "cold - colder than it should do" as she walked the girls in this morning - anyone else notice anything strange... Are these phenomena cause by us being slap bang underneath a high pressure? It would be interesting to see how low the usual frost hollows got last night - Chipstead Valley in Surrey, Benson, Oxon etc ----------------------------------- Mine went from 4.5C to 6.1C about the same time Scott.Don't forget you can look in any of the other Cumulus websites and click on trends to see if there were similar patterns. Ron's near you levelled at that time and then dropped again. Nevertheless, contrary to Peter Gibbs Countryfile forecast 12 hours earlier it was a cold and grey day with a max of 9C. Dave That's strange, Dave, it was beautifully sunny here from 11.45am. It wasn't terribly warm but was pleasant enough while I was digging the garden. Don't know the max as yet as I left for work just before 3pm - will update later My max topped out at 12.2C at 1528z |
Reply |
Thread Tools | Search this Thread |
Display Modes | |
|
|
![]() |
||||
Thread | Forum | |||
strange temperature rise | uk.sci.weather (UK Weather) | |||
Lower min than expected | uk.sci.weather (UK Weather) | |||
CO2 rise due to temperature rise. | sci.geo.meteorology (Meteorology) | |||
Strange temperature rise | uk.sci.weather (UK Weather) | |||
[WR] Sudden temperature rise | uk.sci.weather (UK Weather) |