Showers continued until around 2100 yesterday, gradually becoming less
frequent and heavy.
Overnight min of -3.2 then 2 bands of snow came through. Although not
as heavy as showers yesterday, some blizzard-like conditions around
0730-0800, with drifting even here in the valley bottom. Temp was
below -2 during the snowfall.
Depth levelled out around 18cm on the grass this morning, though with
temp now reaching 3c there is a fair thaw, but should still be plenty
around tomorrow. Hopefully I should be able to retrieve my car from
the bottom of the hill later!
Was surprised at how much snow we got here yesterday. We were right in
the firing line and it was like persistent snow rather than showers.
I note that Bridlington reported 6mm yesterday, 10 miles due E from
here, but significantly less in the way of showers right on the coast.
Most Northerlies seem to produce snow/thaw periods here, so the total
doesn't increase as much as it could, but yesterdays max was 1.1c in
the early hours and only 0.3 during daylight, so the depth just kept
building.

David Mitchell. Langtoft. East Riding.

On 23 Nov, 13:43, wrote:
Was surprised at how much snow we got here yesterday. We were right in
the firing line and it was like persistent snow rather than showers.
I note that Bridlington reported 6mm yesterday, 10 miles due E from
here, but significantly less in the way of showers right on the coast.

Hi, David,

As I wrote yesterday, I expected you would get a fair amount. When I
lived in Scarborough
(in the 1950's and 1960's) large depths of snow just inland from the
coast were not unusual with northerlies.
The depth seemed to be greatest around the Staxton area, especially on
the Wolds, and gradually
diminish beyond Malton to nothing at York. I remember up to a foot
level with nothing 10 miles west
or on the coast.

I well remember watching the continuous stream of Cb clouds by-passing
us to the north and south.
It was all to do with topography and sea temperatures according to my
science teachers at the time.

A very interesting area on a cold northerly. The pub at Blakey on the
moors often had massive amounts
and I see yesterday Fylingdales was reporting almost continuous snow
yesterday.

Ken

On Nov 23, 2:16*pm, Ken Cook wrote:
On 23 Nov, 13:43, wrote:

Was surprised at how much snow we got here yesterday. We were right in
the firing line and it was like persistent snow rather than showers.
I note that Bridlington reported 6mm yesterday, 10 miles due E from
here, but significantly less in the way of showers right on the coast.

Hi, David,

As I wrote yesterday, I expected you would get a fair amount. When I
lived in Scarborough
(in the 1950's and 1960's) large depths of snow just inland from the
coast were not unusual with northerlies.
The depth seemed to be greatest around the Staxton area, especially on
the Wolds, and gradually
diminish beyond Malton to nothing at York. I remember up to a foot
level with nothing 10 miles west
or on the coast.

I well remember watching the continuous stream of Cb clouds by-passing
us to the north and south.
It was all to do with topography and sea temperatures according to my
science teachers at the time.

A very interesting area on a cold northerly. The pub at Blakey on the
moors often had massive amounts
and I see yesterday Fylingdales was reporting almost continuous snow
yesterday.

Ken

We're pretty much due South of Staxton and Fylingdales and you could
almost draw a line a few miles inland from us beyond which it doesn't
snow..
It's interesting that you mention topography, as if you follow the
angle of the coastline from Sunderland South to Saltburn and continue
onto the Humber, the chunk that sits East of this jutting into the
North Sea is particularly the area prone to showers. I am totally not
a scientist, but could the uplift of the Northerly as hits the coast
with some fairly decent cliffs in the Northern part, be the trigger
for the shower activity??? The showers seem to form off the coast here
with no sign of them running past Newcastle, so something must trigger
it somehow. It seems that a very slight Westerly element favours us
here as well.
Anyway, it's beyond me, so long may it continue.

David Mitchell.

david.mitchell wrote

snip various
It's interesting that you mention topography, as if you follow the
angle of the coastline from Sunderland South to Saltburn and
continue
onto the Humber, the chunk that sits East of this jutting into the
North Sea is particularly the area prone to showers. I am totally
not
a scientist, but could the uplift of the Northerly as hits the coast
with some fairly decent cliffs in the Northern part, be the trigger
for the shower activity??? The showers seem to form off the coast
here
with no sign of them running past Newcastle, so something must
trigger
it somehow. It seems that a very slight Westerly element favours us
here as well.

David Mitchell.

.... I believe that it is tied to the difference between land and sea
friction action along the northerly flow: the air flow over land (to
the west) is backed, with respect to the the airflow over the sea -
this leads to convergence along the flow, which may, as you've
indicated, be enhanced by uplift as the air rides up over the hills.
However, the convergent action is observed to take place *before* the
coast is reached, so I would think that the differential friction land
vs. sea is the key element. It's probably a delicate set of factors
involved - a slight change of wind direction or overall speed may
nullify the effect - the Forecasting Reference Book only shows the
effect in the "infrequently observed" category.

.... Will Hand's the man for this as I think he published some data on
shower distribution - I've probably got it here, but can't find it :-(


Martin.

--
Martin Rowley
West Moors, East Dorset (UK): 17m (56ft) amsl
Lat: 50.82N Long: 01.88W
NGR: SU 082 023

On Nov 23, 9:20*pm, "Martin Rowley"
wrote:
david.mitchell wrote

snip various

It's interesting that you mention topography, as if you follow the
angle of the coastline from Sunderland *South to Saltburn and
continue
onto the Humber, the chunk that sits East of this jutting into the
North Sea is particularly the area prone to showers. I am totally
not
a scientist, but could the uplift of the Northerly as hits the coast
with some fairly decent cliffs in the Northern part, be the trigger
for the shower activity??? The showers seem to form off the coast
here
with no sign of them running past Newcastle, so something must
trigger
it somehow. It seems that a very slight Westerly element favours us
here as well.

David Mitchell.

... I believe that it is tied to the difference between land and sea
friction action along the northerly flow: the air flow over land (to
the west) is backed, with respect to the the airflow over the sea -
this leads to convergence along the flow, which may, as you've
indicated, be enhanced by uplift as the air rides up over the hills.
However, the convergent action is observed to take place *before* the
coast is reached, so I would think that the differential friction land
vs. sea is the key element. It's probably a delicate set of factors
involved - a slight change of wind direction or overall speed may
nullify the effect - the Forecasting Reference Book only shows the
effect in the "infrequently observed" category.

... Will Hand's the man for this as I think he published some data on
shower distribution - I've probably got it here, but can't find it :-(

Martin.

--
Martin Rowley
West Moors, East Dorset (UK): 17m (56ft) amsl
Lat: 50.82N * Long: 01.88W
NGR: SU 082 023

Thanks Martin, I hadn't thought about convergence.