In article . com,
Weatherlawyer writes:

Philip Eden wrote:

The mean sea-level chart shows that the Icelandic Low was
pretty much in its normal position but it was considerably
more intense than usual, centred 987mbar at 62N 35W.

An "intense" Icelandic Low is 987?


When you're talking about the average pressure over the entire month at
that location, then that counts as more intense than usual. Obviously if
you are talking about any individual Low during the month, then you
wouldn't call it intense until it was somewhere in the region of 970 or
lower.
--
John Hall "He crams with cans of poisoned meat
The subjects of the King,
And when they die by thousands G.K.Chesterton:
Why, he laughs like anything." from "Song Against Grocers"