A quick summary of what the population centres in the Central Lowlands can expect over the next 48 hours:
First of all the Fax Chart at T+36, midnight Thurs. This show two occluded fronts straddling the lowlands. Note the 528 dam line (a good indicator of wintry precipitation) is moving well down into northern England:
So, an initially interesting set-up. Cold air and fronts moving over us. So let's have a look at how cold the air will be at surface:
Weds 18h00:
Midnight:
And 06h00 Thursday:
So cold - sub-zero everywhere except the western Isles and western Argyle plus the north sea coast of the Borders.
A quick glance at dew points (sub zero hopefully):
And yes - extensively below zero.
So we have sub zero temps, sub zero dewpoints and a front moving over. The next thing to worry about is the upper air temperatures and of course, whether there is actually any precipitation about. From nw extra - here's some great charts that show both together. Watch for upper air temps of -5ºC or below to indicate how wintry the ppn may be:
18h00 Weds:
Midnight - definitely heavier in the east over the Lothians, but Glasgow and Strathclyde not missing out:
And 06h00 Thurs:
Finally the midnight computer generated precipitation-type chart for midnight:
So all in all an interesting 36-48 hours coming up. Let's hope the gritters have been told