Big inversion in these parts last night. North westerlies with the
added adiabatic keep temperatures up in Copley but further down in the
Vale of York they soon fall light at the surface in these situations.
RAF Leeming once informed that an upper W'ly / NWly wind less than
20KT at 2000ft usually brings flat calm and inversions to the Vale of
York.

Last night's mins (Copley -5.1C and Lead Mill -7.4C for comparison)
Topcliffe -13C
Dishforth -10C
Teesside airport -9C
Leeming -8C

Ken
Copley