Storm Forecast Valid: Sun 22 Jun 2014 06:00 to Mon 23 Jun 2014 06:00 UTC Issued: Sat 21 Jun 2014 22:05 Forecaster: GATZEN/BEYER
A level 1 was issued for south-western France mainly for large hail, excessive precipitation, and severe wind gusts.
A level 1 was issued for northern Spain mainly for large hail and severe wind gusts.
A level 1 was issued for north-eastern Spain mainly for large hail and excessive precipitation.
A level 1 was issued for the southern Alpine region (Maritime Alps) for large hail and locally excessive precipitation
A large and wide upper level trough is influencing most parts of eastern Europe and western Russia. Further to the west a ridge can be found that shows a negatively tilted axis reaching from the central Mediterranean seat to the British Isles. Therefore most parts of Central Europe are flooded with a cool air of polar origin.
Southwestern Europe, then, is affected by a substantial upper level low situated to the west of the Iberian Peninsula. On its forward flank, a warm and well mixed air mass is advected into parts of Spain and the southern half of France. In the boundary-layer, moisture increase is expected especially over eastern Spain and southern France, leading to CAPE. In addition, short wave features are forecasted to travel from Spain into southern France during the evening and night hours of the forecast period.