Yellow code for danger of hailstorms and thunderstorms is in force for 9 regions of the country, according to the site of the National Institute of Meteorology and Hydrology (NIMH) at the Bulgarian Academy of Sciences.

The code applies to the following areas: Sofia – city, Sofia – district, Vidin, Montana, Vratsa, Pleven, Lovech, Plovdiv and Pazardzhik. Passing a cold atmospheric front will develop thunderstorms with precipitation and hailstorms.

Temporary phenomena will be intense. Expected amounts of rainfall are 10-15 liters / sq. M, in individual regions up to 30-40 l / sq.m.

Source