Gusts 50 to 60 miles per hour are likely in some places, with potential for gusts of 70 to 80 miles per hour around exposed coasts and hills.
The third storm of the 18/19 season is set to bring heavy downpours and strong gales to the country, with yellow weather warnings now in place in some areas.
Local Social Media weather expert Louth Weather has warned that Storm Callum has the potential to cause damage upon its arrival later tonight and early tomorrow morning.
It means an increased likelihood of travel delays, road and rail closures, power cuts and potential risks to life and property.
High tides are also near their peak, heightening the risk of coastal impacts due to large waves.
Edinburgh will then see heavy rain continuously throughout the day on Saturday, only easing towards late evening.
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"Netweather Forecaster Jo Farrow said" Storm Callum is expected to bring very strong winds to western Britain and Northern Ireland during Friday morning, lasting for NW Scotland into the afternoon. Winds of up to 130km are expected in coastal ares along with heavy rain and a risk of flooding.
Storm Callum is now swirling off the southwest coast and will deepen rapidly over the course of the next 12 hours, according to Midland weather expert Cathal Nolan. High sided vehicles and motorcyclists are particularly vulnerable to strong winds - slow down and give extra space to pedestrians and cyclists.
A yellow warning for wind is in place across the west coast of Scotland, including Glasgow and parts of the central belt, throughout Friday.
Sioned Warrell, Natural Resources Wales Duty Tactical Manager, said: "The rain could cause flooding, especially in south and west Wales, and we are urging people to prepare themselves". Flood barriers have already been erected in Galway, with flooding likely along the Salthill and Spanish Arch areas of the city.
The new weather system arriving from the Atlantic is set to batter the United Kingdom with gale force winds and 36 hours of heavy rain.
Winds of up to 60 miles per hour are also expected to hit Pembrokeshire, which combined with high tides could lead to some coastal impact due to large waves.