Tudor Hughes wrote:

In "Weather", March 1975, there is a short article (M W Stubbs)
on an unusually deep Low that passed more or less directly over OWS "D"
(44N, 41W) at 2025Z on 29 Jan 1972. The lowest pressure recorded was
947.5 mb. At 2000Z the pressure was 955.3, 3-hr tendency -35.0 mb.
From various other figures quoted one can deduce that the 3-hr tendency
at 2025Z was -41 mb. At 2025Z the pressure then rose 22.6 mb in 35
minutes(!), and the 2100Z ob shows 340°/85 kn, sky obscured, heavy
showers, pressure 970.1 mb. At 2300Z, the last ob quoted, the
pressure was 987.8 mb, tendency +32.5 in 3 hrs. Extrapolating to
2325Z, the 3-hr tendency would be +40 to +41 mb.

Thanks Tudor - pretty extraordinary figures. I'm wondering if the
Icelandic report is the biggest pressure rise over land. I struggle to
believe the 59m/s sustained wind report however (109kts, if I'm not
wrong?) !

Cheers
Richard