.... (11/0715Z): light, small flakes of snow - VIS ~4km - now covering
most roof surfaces and patchy covering on paths, but roads clear and
running well. At 06Z (first light), even less impact with just a few
patches on roofs, all blacktop surfaces clear. Even struggling to settle
on grass. No impact on daily life if this is the worst it gets.
OAT = -0.2°C.

Martin.



--
West Moors / East Dorset
Lat: 50deg 49.25'N, Long: 01deg 53.05'W
Height (amsl): 17 m (56 feet)
COL category: C1 overall

... (11/0715Z): light, small flakes of snow - VIS ~4km - now covering
most roof surfaces and patchy covering on paths, but roads clear and
running well. At 06Z (first light), even less impact with just a few
patches on roofs, all blacktop surfaces clear. Even struggling to settle
on grass. No impact on daily life if this is the worst it gets.
OAT = -0.2°C.

.... (11/0800Z): steady/slight - but recently could just about justify
something a little more intense? VIS now come down noticeably - circa
1500M, with a 'misty' element. More surfaces picking up a shallow cover
- but roads/paving etc., all fine/clear.
OAT = -0.4°C

Martin.



--
West Moors / East Dorset
Lat: 50deg 49.25'N, Long: 01deg 53.05'W
Height (amsl): 17 m (56 feet)
COL category: C1 overall

... (11/0715Z): light, small flakes of snow - VIS ~4km - now covering
most roof surfaces and patchy covering on paths, but roads clear and
running well. At 06Z (first light), even less impact with just a few
patches on roofs, all blacktop surfaces clear. Even struggling to settle
on grass. No impact on daily life if this is the worst it gets.
OAT = -0.2°C.

... (11/0800Z): steady/slight - but recently could just about justify
something a little more intense? VIS now come down noticeably - circa
1500M, with a 'misty' element. More surfaces picking up a shallow cover
- but roads/paving etc., all fine/clear.
OAT = -0.4°C

.... (11/0915Z): steady, light snow - but I can now see the As tr above
St fra so I suspect it's on the way out. VIS back up to ~4 km; shallow,
non-continuous cover on roofs, sheds and similar: all blacktop surfaces
wet with only a light/patchy cover at the edges of sheltered pathways.
Quite difficult to assess (for 09Z reading) whether we've got a genuine
more-than-halfcover of snow - I'd assess as 60% given our suburban
character, so only just. Depth just about 1 cm on shed roof and screen,
otherwise 0.5 cm and much of it just about 0.1 cm.

OAT = -0.6°C // DP -2.8°C.

--
West Moors / East Dorset
Lat: 50deg 49.25'N, Long: 01deg 53.05'W
Height (amsl): 17 m (56 feet)
COL category: C1 overall

... (11/0915Z): steady, light snow - but I can now see the As tr above
St fra so I suspect it's on the way out. VIS back up to ~4 km; shallow,
non-continuous cover on roofs, sheds and similar: all blacktop surfaces
wet with only a light/patchy cover at the edges of sheltered pathways.
Quite difficult to assess (for 09Z reading) whether we've got a genuine
more-than-halfcover of snow - I'd assess as 60% given our suburban
character, so only just. Depth just about 1 cm on shed roof and screen,
otherwise 0.5 cm and much of it just about 0.1 cm.

OAT = -0.6°C // DP -2.8°C.

.... (11/1155Z): still light PPN, small flakes of snow, wandering lazily
down out of thin As (sun's position clearly seen); low-level air clearly
drying out as the previous St fra has dispersed as far as I can see. No
impact from PPN, VIS good now, at least 12 km, and earlier snow cover,
such as it was, has largely melted off from residual/stored heat.

OAT = +1.1°C // DP = -3.9°C.

Martin.




--
West Moors / East Dorset
Lat: 50deg 49.25'N, Long: 01deg 53.05'W
Height (amsl): 17 m (56 feet)
COL category: C1 overall

... (11/1155Z): still light PPN, small flakes of snow, wandering lazily
down out of thin As (sun's position clearly seen); low-level air clearly
drying out as the previous St fra has dispersed as far as I can see. No
impact from PPN, VIS good now, at least 12 km, and earlier snow cover,
such as it was, has largely melted off from residual/stored heat.

OAT = +1.1°C // DP = -3.9°C.

.... (11/1505Z): the odd flake now but I judge more to do with the Cu
drifting downwind rather than the Cm shield: have been a couple of
spells of persistent -SN in past 3 hours, but certainly no impact on
VIS/SFC & the 'older' snow is now virtually confined to some patches on
grass. I think we've always been on the edge of the thicker cloud, and
in past hour as it's drawn away, the sun has shone through the Cs neb/As
tr strongly enough to cast weak shadows - some FEW/SCT Cu med now.

OAT = +1.2°C // DP = -5.7°C.

Martin.



--
West Moors / East Dorset
Lat: 50deg 49.25'N, Long: 01deg 53.05'W
Height (amsl): 17 m (56 feet)
COL category: C1 overall

... (11/1505Z): the odd flake now but I judge more to do with the Cu
drifting downwind rather than the Cm shield: have been a couple of
spells of persistent -SN in past 3 hours, but certainly no impact on
VIS/SFC & the 'older' snow is now virtually confined to some patches on
grass. I think we've always been on the edge of the thicker cloud, and
in past hour as it's drawn away, the sun has shone through the Cs neb/As
tr strongly enough to cast weak shadows - some FEW/SCT Cu med now.

OAT = +1.2°C // DP = -5.7°C.

.... (11/1810Z): dry/well-lifted cloud base: air continuing to dry out -
perky/parky wind(!) - snow virtually gone through combination heating
from below & reducing relative humidity.

OAT = +0.3°C // DP = -8.1°C.

I see there is one dew point of -11 upwind of us at 17Z.

Martin.

--
West Moors / East Dorset
Lat: 50deg 49.25'N, Long: 01deg 53.05'W
Height (amsl): 17 m (56 feet)
COL category: C1 overall

... (11/1505Z): the odd flake now but I judge more to do with the Cu
drifting downwind rather than the Cm shield: have been a couple of
spells of persistent -SN in past 3 hours, but certainly no impact on
VIS/SFC & the 'older' snow is now virtually confined to some patches on
grass. I think we've always been on the edge of the thicker cloud, and
in past hour as it's drawn away, the sun has shone through the Cs neb/As
tr strongly enough to cast weak shadows - some FEW/SCT Cu med now.

OAT = +1.2°C // DP = -5.7°C.

.... (11/1810Z): dry/well-lifted cloud base: air continuing to dry out -
perky/parky wind(!) - snow virtually gone through combination heating
from below & reducing relative humidity.

OAT = +0.3°C // DP = -8.1°C.

I see there is one dew point of -11 upwind of us at 17Z.

Martin.

--
West Moors / East Dorset
Lat: 50deg 49.25'N, Long: 01deg 53.05'W
Height (amsl): 17 m (56 feet)
COL category: C1 overall