WEATHER FORECASTS
National Institute of Meteorology and Hydrology
Latest Measurements
| Station | Date | Hour | Temperature [°C] | Weather | Wind speed [m/s] | Wind direction | Air pressure [hPa] |
|---|---|---|---|---|---|---|---|
| Novo Selo | 11.12.2023 | 11 | 6 |  partly cloudy | 0 | тихо | 1010.7 |
| Vidin | 11.12.2023 | 11 | 5 |  recent fog | 1 | SE | 1013.7 |
| Vratsa | 11.12.2023 | 11 | 6 |  clear/sunny | 1 | S | 979.9 |
| Montana | 11.12.2023 | 11 | 6 | clear/sunny | 1 | SW | 994.1 |
| Lom | 11.12.2023 | 11 | 5 | clear/sunny | 2 | S | 1014.9 |
| Oryahovo | 11.12.2023 | 11 | 3 |  cloudy | 0 | тихо | 1014.3 |
| Knezha | 11.12.2023 | 11 | 4 |  mostly cloudy | 1 | S | 1002.1 |
| Lovech | 11.12.2023 | 11 | 6 | partly cloudy | 2 | S | 991 |
| Pleven | 11.12.2023 | 11 | 3 | cloudy | 0 | тихо | 997.8 |
| V. Tarnovo | 11.12.2023 | 11 | 3 | cloudy | 0 | тихо | 994.1 |
| Svishtov | 11.12.2023 | 11 | 3 | cloudy | 0 | тихо | 1011.7 |
| Ruse | 11.12.2023 | 11 | 3 | cloudy | 1 | S | 1013.1 |
| Shumen | 11.12.2023 | 11 | 0 |  mist | 0 | тихо | 991.5 |
| Razgrad | 11.12.2023 | 11 | 0 | cloudy | 1 | S | 975.9 |
| Silistra | 11.12.2023 | 11 | 4 | cloudy | 2 | S | 1014.9 |
| Silistra-NIMH | 11.12.2023 | 11 | 4 | mostly cloudy | 0 | тихо | 1016 |
| Varna | 11.12.2023 | 11 | 4 | partly cloudy | 2 | W | 1013.4 |
| Shabla | 11.12.2023 | 11 | 2 | cloudy | 2 | W | 1017.9 |
| Kaliakra | 11.12.2023 | 11 | 3 | cloudy | 1 | N | 1010.8 |
| Dobrich | 11.12.2023 | 11 | 1 | mist | 2 | W | 993.5 |
| Murgash | 11.12.2023 | 11 | -3 |  fog | 0 | тихо | 827.9 |
| Kyustendil | 11.12.2023 | 11 | 4 | partly cloudy | 0 | тихо | 955.3 |
| Dragoman | 11.12.2023 | 11 | 3 | cloudy | 2 | W | 934.1 |
| Blagoevgrad | 11.12.2023 | 11 | 4 | clear/sunny | 1 | SW | 968.7 |
| Cherni Vrah | 11.12.2023 | 11 | -3 | clear/sunny | 2 | SW | 766.7 |
| Sofia | 11.12.2023 | 11 | 5 | cloudy | 1 | N | 947.4 |
| Mussala | 11.12.2023 | 11 | -8 | partly cloudy | 6 | N | 706.9 |
| Plovdiv | 11.12.2023 | 11 | 3 | mist | 0 | тихо | 1000 |
| Botev | 11.12.2023 | 11 | -7 | fog | 10 | NW | 757.1 |
| Pazardzhik | 11.12.2023 | 11 | 2 | mist | 2 | S | 992.9 |
| Chirpan | 11.12.2023 | 11 | 3 | mist | 3 | N | 997 |
| Kazanlak | 11.12.2023 | 11 | 1 | fog | 1 | W | 969.6 |
| Stara Zagora | 11.12.2023 | 11 | 2 | mist | 1 | E | 998.4 |
| Sliven | 11.12.2023 | 11 | 5 | clear/sunny | 2 | W | 988.4 |
| Elhovo | 11.12.2023 | 11 | 3 | mist | 1 | E | 1000.6 |
| Karnobat | 11.12.2023 | 11 | 2 | fog | 1 | W | 995.8 |
| Emine | 11.12.2023 | 11 | 6 | partly cloudy | 4 | W | 1011.2 |
| Burgas | 11.12.2023 | 11 | 4 | mist | 2 | S | 1015.6 |
| Ahtopol | 11.12.2023 | 11 | 7 | cloudy | 3 | N | 1015.3 |
| Sandanski | 11.12.2023 | 11 | 6 | clear/sunny | 1 | W | 994.6 |
| Gotse Delchev | 11.12.2023 | 11 | 0 | recent fog | 1 | S | 949.8 |
| Rozhen | 11.12.2023 | 11 | 2 | clear/sunny | 1 | W | 821.8 |
| Kurdzhali | 11.12.2023 | 11 | 2 | fog | 0 | тихо | 978.6 |
| Haskovo | 11.12.2023 | 11 | 1 |  fog | 2 | N | 990.3 |
Legend—Measurements
| Symbol | Weather | Symbol | Weather | Symbol | Weather | Wind—Symbol | m/s | km/h | Knots |
| clear/sunny |  | recent drizzle |  | heavy drizzle |  |
0 | 0 | 0 |
| partly cloudy |  | drizzle and rain; recent rain; slight rain shower(s); |  | moderate rain; |  |
2 | 7 | 3 |
| mostly cloudy |  | recent snow; light snow; snow or crystals |  | moderate rain; moderate rain shower(s); |  |
3,5 | 12 | 7 |
| visibility reduced by smoke,dust or sand;dust or sand whirl(s);mist; |  | rain and snow |  | heavy rain |  |
5 | 18 | 12 |
| duststorm or sandstorm; thick fog; |  | freezing drizzle/rain |  | violent rain shower(s) |  |
8 | 28 | 17 |
| haze; shallow fog; |  | recent snow shower;light snow; |  | rain and snow |  |
10 | 36 | 22 |
 | lightening(s) |  | recent hail; sleet; hail; |  | heavy snow; snow shower(s) |  |
15 | 55 | 32 |
| rain shower, not falling; cloudy |  | blowing snow; moderate snow; snow shower(s); |  | diamond dust,sleet |  |
25 | 90 | 52 |
 | shower near the station | | light or dissipating fog; |  | heavy rain and snow |  |
30 | 110 | 62 |
 | squall(s); tornado; recent thunder; |  | light or moderate drizzle; |  | hailstorm |  |
50 | 180 | 102 |
Satellite IR
Cloud Systems
(Temperature of cloud tops or land/sea surface if clouds are missing)
The scale is in Kelvin, dublicated in °C.:
Satellite RGB
Airmasses
 | Thick high-level clouds |
 | Thick mid-level clouds |
 | Jet stream, high Potential Vorticity (PV) |
 | Cold airmass |
 | Warm airmass – high tropopause |
 | Warm airmass – low tropopause |
EUMETSAT is the European intergovernmental satellite organisation for monitoring weather, climate and the environment.
EUMETSAT operates and develops the European system of meteorological satellites monitoring the atmosphere and ocean and land surfaces which deliver weather and climate-related satellite data, images and products – 24 hours a day, 365 days a year. This information is supplied to the National Meteorological Services of the organisation's Member and Cooperating States (in Bulgaria—NIMH) as well as other users worldwide.
Bulgaria is a Cooperating State EUMETSAT since May 25, 2005.
24-hour Precipitation Map
24-hour precipitation sum analysis since 8 h local time on 27.06.2023 until 8 h on 28.06.2023, using ALADIN numerical model and measured data from NIMH stations. It is calculated once daily about 12 o'clock. It is produced automatically and may sometimes contain inaccurate data that is corrected later.
Lightening Detection over Bulgaria
Hourly (in UTC) and space distribution of lightenings registerred over Bulgarian territory during the last day - from 0h to 24h (ATDnet)
UTC - Summer daylight saving time in Bulgaria is UTC+3, in Winter the local time is UTC+2
The Met Office designed and built ATDnet long range lightning location system is capable of locating thunderstorms at distances in excess of 10,000km and is operational 24 hours a day, 7 days a week. ATDnet (Arrival Time Differing NETwork) is in use since 1987 and its sensors are in Europe, Northern Africa and the North Atlantik.
Preparedness for Firefighting
| Степен на риск/ Hazard | Описание на български | Description in English |
| Малък Low | Съществуващи пожари се самозагасяват и е малко вероятно да възникват нови. Жизнени пожари са възможни само като тлеене в дълбоки сухи слоеве. | Fires likely to be self-extinguishing and new ignitions unlikely. Any existing fires limited to smoldering in deep, drier layers. |
| Умерен Moderate | Възможни са леки и бавно развиващи се пожари. Съществуващи пожари се гасят лесно от наземни екипи с помпи и ръчни инструменти. | Creeping or gentle surface fires. Fires easily contained by ground crews with pumps and hand tools. |
| Голям High | Възможни са умерени до силни пожари с въвличане на дървесни корони само локално. Пожарите са трудни за овладяване от наземни екипи. Често се налага използване на тежка екипировка за овладяване на пожарите (булдозери, камиони-цистерни, самолети). | Moderate to vigorous surface fire with intermittent crown involvement. Challenging for ground crews to handle; heavy equipment (bulldozers, tanker trucks, aircraft) often required to contain fire. |
| Много голям Very High | Възможни са много силни пожари с частично или пълно въвличане на дървесните корони. Предните фронтове на пожарите е невъзможно да бъдат овладени от наземни екипи. Налагат се въздушни атаки със забавящ агент (retardant), за да се атакуват успешно предните фронтове на пожарите. | High-intensity fire with partial to full crown involvement. Head fire conditions beyond the ability of ground crews; air attack with retardant required to effectively attack fire's head. |
| Екстремален Extreme | Възможни са бързо разпространяващи се много силни пожари с въвличане на дървесните корони. Пожарите са трудни за овладяване. Действията по погасяване се ограничени само по фланговете на пожара. Възможни са само индиректни действия, насочени срещу предните фронтове на пожарите. | Fast-spreading, high-intensity crown fire. Very difficult to control. Suppression actions limited to flanks, with only indirect actions possible against the fire's head. |
| Не се пресмята (сняг) (Snow) | Не се извършват изчисления за този район. (Наличие на снежна покривка). | No calculations were performed for this region. |
Източник: Canadian Forest Service (http://cfs.nrcan.gc.ca/)
The system is operational since April,2008 during the warm months (April-October)The Canadian Fire Weather Index, FWI, developed in the Canadian Forest Service Research Center is used.
Data used (input elements for FWI calculation):
- precipitaion amount for the last 24 hours;
- air temperature;
- air relative humidity;
- wind speed; snow cover presence;
- day duration.
FWI has three sub-indices showing the "dryness" of different types of "fuel". Each of these sub-idices is a complex function of the meteo-elements. Knowing the sub-indices and wind velocity data, two other sub indices are calculated, which evaluate the initial fire kindling and the available "fuel" for the further unfolding of the fire. On their basis the FWI in calculated and it gives an overall assessment of the intensity of fire unfolding (in energy released per unit time per unit length along the fire front line).
Thermal Comfort/Discomfort Analysis for the Last Synoptic Term
The maps are based on an operational objective analysis of data from the NIMH synoptic stations.
Note: Data are operational. Errors are possible. To be used for decision making only after consultation with the weather forecaster on duty.
Thermal Comfort Index in Our Weather Stations on 11.12.2023 в 06 UTC
The data are from the last observation in the Bulgarian weather stations.
Time in Bulgaria is UTC+2 h in Winter and UTC+3 h in Summer.
| Station | Measured | Calculated | |||||
|---|---|---|---|---|---|---|---|
| Temperature [°C] | Relative humidity [%] | Wind speed [m/s] | Clouds [tenths] | Feels like temperature [°C] | Comfort index | Proposed clothing | |
| Novo Selo | 1.3 | 98 | 0. | 6. | -1.9 | 6 | 1.61 |
| Vidin | -1.9 | 100 | 1. | 3. | -8.0 | 6 | 1.93 |
| Vratsa | 2.1 | 84 | 5. | 0. | -6.3 | 6 | 1.84 |
| Montana | 2.0 | 95 | 3. | 0. | -5.0 | 6 | 1.78 |
| Lom | 2.3 | 93 | 0. | 6. | -0.9 | 6 | 1.56 |
| Oryahovo | 2.4 | 93 | 0. | 10. | 1.7 | 7 | 1.43 |
| Knezha | -0.4 | 100 | 0. | 6. | -3.8 | 6 | 1.72 |
| Lovech | -0.2 | 100 | 1. | 4. | -5.6 | 6 | 1.81 |
| Pleven | -0.3 | 100 | 0. | 5. | -4.0 | 6 | 1.73 |
| V. Tarnovo | -0.2 | 98 | 0. | 6. | -3.5 | 6 | 1.70 |
| Svishtov | 1.7 | 89 | 0. | 10. | 0.7 | 7 | 1.48 |
| Ruse | 1.0 | 88 | 1. | 6. | -4.0 | 6 | 1.72 |
| Shumen | -1.2 | 92 | 0. | 10. | -2.7 | 6 | 1.65 |
| Razgrad | -1.7 | 98 | 2. | 8. | -8.1 | 6 | 1.94 |
| Silistra | 1.0 | 87 | 3. | 10. | -6.2 | 6 | 1.84 |
| Silistra-NIMH | 0.8 | 88 | 1. | 10. | -4.2 | 6 | 1.74 |
| Varna | 1.5 | 87 | 2. | 3. | -4.8 | 6 | 1.77 |
| Shabla | 0.2 | 94 | 2. | 8. | -5.3 | 6 | 1.79 |
| Kaliakra | 1.1 | 94 | 2. | 10. | -5.1 | 6 | 1.78 |
| Dobrich | -0.5 | 98 | 2. | 10. | -7.3 | 6 | 1.90 |
| Murgash | -3.4 | 95 | 2. | 0. | -11.6 | 5 | 2.12 |
| Kyustendil | -1.4 | 96 | 0. | 0. | -6.1 | 6 | 1.83 |
| Dragoman | 1.9 | 95 | 3. | 10. | -4.8 | 6 | 1.77 |
| Blagoevgrad | 0.5 | 96 | 1. | 0. | -5.2 | 6 | 1.79 |
| Cherni Vrah | -5.8 | 92 | 0. | 1. | -11.5 | 5 | 2.12 |
| Sofia | 1.4 | 91 | 1. | 8. | -2.9 | 6 | 1.67 |
| Mussala | -9.0 | 85 | 8. | 2. | -23.1 | 4 | 2.72 |
| Plovdiv | -1.2 | 100 | 0. | 3. | -5.4 | 6 | 1.79 |
| Botev | -6.8 | 96 | 10. | 0. | -20.0 | 4 | 2.56 |
| Pazardzhik | -2.2 | 98 | 1. | 1. | -8.4 | 6 | 1.96 |
| Chirpan | 1.5 | 93 | 3. | 10. | -5.4 | 6 | 1.80 |
| Stara Zagora | -1.4 | 97 | 1. | 3. | -7.4 | 6 | 1.90 |
| Sliven | -0.4 | 96 | 0. | 3. | -4.3 | 6 | 1.74 |
| Elhovo | 1.1 | 96 | 2. | 6. | -4.7 | 6 | 1.76 |
| Karnobat | -0.2 | 98 | 1. | 10. | -5.3 | 6 | 1.79 |
| Emine | 5.0 | 84 | 2. | 8. | 0.8 | 7 | 1.47 |
| Burgas | 2.8 | 91 | 5. | 2. | -4.8 | 6 | 1.76 |
| Ahtopol | 6.5 | 82 | 2. | 10. | 2.3 | 7 | 1.39 |
| Sandanski | 1.2 | 92 | 1. | 0. | -4.4 | 6 | 1.74 |
| Gotse Delchev | -2.5 | 96 | 0. | 1. | -7.2 | 6 | 1.89 |
| Rozhen | -4.1 | 84 | 2. | 1. | -12.5 | 5 | 2.17 |
| Kurdzhali | 1.3 | 98 | 0. | 2. | -2.3 | 6 | 1.64 |
| Haskovo | 0.7 | 96 | 2. | 5. | -5.5 | 6 | 1.80 |
The proposed maps show the current or expected feeling of thermal comfort/discomfort of the majority of people. The maps refer to a standard time of day, which corresponds to the classical observation periods at weather stations. For example, 12 UTC (Coordinated Universal Time) corresponds to 14:00 Bulgarian time (15:00 summer time), which is usually close to the warmest hours of the day, and 03 UTC corresponds to 05:00 Bulgarian time (06:00 summer weather) which is usually close to the coldest hours of the day.
Thermal Comfort Classes, Description of the Sensation of Comfort/Discomfort and Recommended Clothing
The table shows the degrees of thermal comfort/discomfort. The categories of comfortable, warm and hot are defined on the basis of the degrees of physiological stress to which the human thermoregulatory system is subjected in the different temperature conditions according to the feels like temperature. The categories for cold are according to the Wind Chill Index.
| Thermal comfort class | From feels like temperature, °С | To feels like temperature, °С | Grade in colour | Thermal sensation of comfort or discomfort | Description | Level of clothing |
| 13 | 44 | - | Extreme heat | Substantial risk of thermal shock in prolonged work/stay outdoors. | 0.4 | |
| 12 | 38 | 44 | Very hot | The mechanism of self-cooling by sweating is hindered. | 0.4 | |
| 11 | 32 | 38 | Hot | Almost the whole body is covered in sweat. | 0.4 | |
| 10 | 26 | 32 | Very warm | A big part of the body is covered with sweat. | 0.4 | |
| 9 | 20 | 26 | Warm | Sweating has started. A small part of the body is covered with sweat. | 0.5-0.4 | |
| 8 | 10 | 20 | Comfortable | Sensation of thermal comfort with suitable clothing | 1.0-0.5 | |
| 7 | 0 | 10 | Cool | Thermal comfort can be achieved with suitable clothing, but there is slight discomfort in the cold side on exposed parts of the body. | 1.5-1.0 | |
| 6 | -10 | 0 | Cold | Goosebumps start. | 2.0-1.5 | |
| 5 | -18 | -10 | Very cold | Shivering starts. | 2.4-2.0 | |
| 4 | -27 | -18 | Possible frost bite | Possible frost bite of bare skin | 2.9-2.4 | |
| 3 | -35 | -27 | Frost bite of bare skin | Frost bite of bare skin within 30 min of exposure | 3.3-2.9 | |
| 2 | -47 | -35 | Rapid frost bite of bare skin | Frost bite of bare skin within 10 min of exposure | 3.9-3.3 | |
| 1 | - | -47 | Dangerously rapid frost bite | Dangerously rapid frost bite with 5 min of exposure | 4.0 |
Clothing Index—Meaning
| Recommended clothing ensemble | Clothing index |
|---|---|
| Nude | 0 |
| Shorts | 0.1 |
| Shorts, open-neck shirt with short sleeves, sandals | 0.35 |
| Long light-weight trousers, open-neck shirt with short sleeves, open shoes | 0.5 |
| Long trousers, open-neck cotton work shirt with long sleeves, shoes | 0.7 |
| Long trousers, cotton work shirt with long sleeves, shoes, and a light jacket | 0.9 |
| Typical business suit (long trousers, cotton work shirt with long sleeves, vest, shoes, and a jacket) | 1.0 |
| Typical business suit and a cotton coat | 1.5 |
| Long resistant trousers, woolen flannel shirt, woolen socks, shoes, wind and water resistant jacket and vest, a hat and gloves | 1.5-2.0 |
| Polar weather suit with hood, warmth-keeping shoes, a hat covering the ears, strong isolating gloves | 3.0-4.0 |
Feels Like Temperature
Feels like temperature is the air temperature in a reference atmospheric environment where a person's sense of thermal comfort/discomfort would be the same as in real weather conditions. The feeling of thermal comfort is calculated using a numerical model of the thermal balance of a human body of a "standard" person placed in the conditions of the Earth's atmosphere near ground in outdoors, on grass or snow cover, when present. A "standard" person is a 35-year-old man, 1.75 m tall and weighing 75 kg. The “standard” person performs work at a power corresponding to walking at a speed of 4 km/h on a horizontal surface. The wind is supposed to always blow from the side of the direction of movement. The clothing is adapted (summer/winter) so that the "standard" person, if possible, achieves thermal comfort in the specific outdoor weather conditions. The following weather parameters are involved: air temperature; relative humidity; wind speed; presence of snow cover; cloudiness; geographical coordinates and altitude of the place; date and time. Values are adapted to reflect conditions near ground (0-2 m), where the "standard" person operates.
