Updated Oct. 18, 2019 1:06 PM
Two storms will push into the Mediterranean Sea in the coming days, bringing waves of heavy rain from Spain to the Alps.
The first storm will move into the northern Mediterranean Sea before the second half of the weekend.
A storm pushing in from Spain will bring a persistent southerly flow from the warm waters of the Mediterranean into southern and eastern France, western Italy and much of Switzerland.
While there could be more widespread rainfall, locations east of Montpelier and Lyon to Milan will likely have the heaviest rainfall. Amounts are likely surpass 25 mm (1 inch), with the highest totals likely on the southward-facing coasts. Rainfall up to 150 mm (6 inches) could be possible in more remote locations.
"It is in these areas that rain will persist into Monday evening," said AccuWeather Meteorologist Brett Edwards.
Given the recent rainfall in the region, this new wave of rain could be all that the ground could handle.
Montpellier had 30 mm (1.20 inches) of rainfall on Monday and Tuesday. As of Friday morning, Nice recorded 38 mm (1.5 inches) of rain since Monday. In just a single day, Geona, Italy, received over 130 mm (5.1 inches) of rain, almost an entire month's worth, on just Tuesday.
"After all the rain the region has already received, flooding will certainly be a concern with this next storm," Edwards added.
In urban areas, heavy rain will pond on the roadways and could cause hydroplaning and delays. Mudslides could also be a concern in the higher terrain.
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Parts of southern France are set to get even more rain later next week. The Montpellier region will get a second dose of heavy rain for the middle of the week.
"As this second storm enters the Mediterranean Sea, it will stall over the Balearic Sea for at least 48 hours," said Edwards
The immobile storm will allow round after round of rain to batter eastern Spain and far-southern France and thus higher rainfall totals.
Some of the communities most at risk include Barcelona, Valencia and Zaragoza in Spain and Béziers and Perpignan in southern France.
"Heavy rainfall of 50-100 mm (2-4 inches) will be possible Tuesday through Thursday," Edwards added.
An AccuWeather Local StormMax™️ of 200 mm (8 inches) is expected with the storm.
This is a region of southern Europe that has been much drier as of late, so overall some locations could use the rain.
However, areas that are hit with repeated rounds could be inundated with too much rain too quickly, resulting in flooding. Mudslides will also be a concern.
An onshore wind for northeastern Spain could also bring coastal flooding, especially at times of high tide.
The storm looks to finally move away from the Spanish Mediterranean coast late in the week, bringing a break from the rainfall. However, more storminess could be in store before the end of October.
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