Bulgarian hail suppression

The geographical location and diverse terrain of Bulgaria makes it one of the countries with the highest number of hail events in Europe.

Hail is a weather phenomenon extremely harmful to the agricultural crops.

The Bulgarian hail suppression agency was found in 1968 as a part of the Ministry of Agriculture. The Hail Suppression Agency now has protected area of 2 million hectares in the regions where hail damages have turned out to be the strongest: the districts of Vidin, Montana, Vratsa, Pleven, Pazardjik, Plovdiv, Stara Zagora, Sliven and Haskovo.

The Hail Suppression Agency uses MRL-IRIS Doppler radars for monitoring the weather conditions and cloud seeding.

Real time meteorological radar information is transferred to the Ministry of Interior, Air Force, Bulgarian Air Traffic Services Authority, National Institute of Meteorology and Hydrology, State Owned Enterprice “Management and Stewardship of dams” and Sofia Municipality.

Weather information
depending on the radar reflectivity

5 – 15 dBZ
Cloud boundary
15 – 25 dBZ
Non-precipitating clouds
25 – 30 dBZ
Light rain
30 – 40 dBZ
Light to moderate rain
40 – 45 dBZ
Moderate rain and probability of lightning
45 – 50 dBZ
Moderate to heavy rain and lightning
50 – 55 dBZ
Heavy rain, lightning and probability of graupel
55 – 60 dBZ
Very heavy rain, lightning and probability of  hail
60 – 65 dBZ
Very heavy rain, lightning and probability of severe hail 
> 65 dBZ
Very heavy to extremely heavy rain, lightning, severe hail
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