If you live in northern Spain, you probably know already it's not the right time to go for a dip in the sea.
Eleven-metre tidal waves (36 feet) and winds of up to 100 kilometres per hour (63mph) have been recorded in Galicia, Asturias, Cantabria and the Basque Country.
Even inland northern Spanish regions like La Rioja and Navarre have also felt the effects of a vicious storm which on Monday swept a teenager out to sea in A Coruña (Galicia).
But the worst is yet to come.
Spain’s official weather agency AEMET has put out a warning about the arrival on Wednesday of Storm Petra, a huge low-pressure area that will quickly form as it’s met by several cold Atlantic fronts.
The result? Even bigger waves, winds of up to 140 kilometres per hour and a sudden drop in temperatures.
Here are some of the most jaw-dropping storm photos posted by Twitter users over the past few days. We’ll update the selection as new images of Storm Petra come in.
Wrap up and enjoy!
Impresionante imagen temporal del norte: Isla de Mouro bocana puerto de Santander por Esteban Cobo EFE. pic.twitter.com/3KVpjS1mY2— José Luis González (@josslu9) February 4, 2014
La borrasca -Petra- ya tiene la potencia de un huracán Categoría 1, aunque su proceso NO tiene nada que ver. pic.twitter.com/OdPLnsAzhe— JonathanGómezCantero (@JG_Cantero) February 4, 2014