This is the 1 am synop report for Belmullet, 30 m northeast of Blackrock. Overcast @ 300 ft, visibility 3 km.
AAXX 14011 03976 47130 /2210 10106 20099 30242 40254 55003 7818/ 88///
333 88/03==
Visibility: 3 km
Wind: 220 (SE) @ 10 m/s (19 kts)
Temp 10.6 °C, Dewpoint 9.9 °C
Sea level pressure: 1025.4 hPa
Pressure trend past 3 hours: almost no change
Weather: rain showers
Cloud: Overcast with base at 300 ft
At Mace Head, 80 km to the southeast, conditions were similar, with cloud Overcast at 400 ft, lowering to 200 ft by 2 am.