21:30 to
22:30,
972.4 hPa.
The pressure in Iceland has only on three occasions dropped down to
975 hPa or lower in the entire record extending
back to the 1820s. These
cases were
974.1 hPa in Stykkishólmur on 18 July 1901,
974.3 hPa in Stykkishólmur on 19 July 1923 and
975.0 hPa in Reykjavík 11 July 1912.
It should be kept in mind that
although the pressure was recorded at a few stations
all
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