Weather report issued by The Marine Meteorological Center Split on 27.12.2020 at 06


Warning
Local gusts of NE and E winds 35-60 knots, gradually decreasing whereas in the afternoon in the open sea of the South and of a part of the Central Adriatic gusts of NW and SW winds increasing to 35-50 knots. Already in the second part of the night in the North and in a part of the Central Adriatic gusts of SE wind increasing fast to 35-45 knots. Sea locally 5. Isolated thunderstorms in the Central and South Adriatic.
Synopsis
The low across the Tyrrhenian Sea and the South Adriatic is slowly filling up, the field of high from the northeast is becoming weaker and a new deep trough is approaching from the west.
Weather forecast for the Adriatic for the first 12 hours
NE and E winds 16-32 knots, decreasing in the afternoon and in the open turning to NW and SW winds which will be increasing to 14-28 only in the South and in a part of the Central Adriatic and to 38 knots in the far south. Sea 3-4, locally in the open 5, in the afternoon along the coast temporarily calming to 2-3. Visibility 10-20 km. Variably cloudy with scattered rain, rain showers and thunder and along the coast also with a chance of light snow, particularly in the South and Central Adriatic.
Weather forecast for the next 12 hours
Moderate, in the open sea to near gale force NW and SW winds, decreasing further on whereas already from the middle of the night new SE wind expected to be increasing fast in the North and in a part of the Central Adriatic. Sea slight and moderate, in the open of southern part also rough. Variably cloudy with scattered rain, rain showers and thunder and along the coast of southern part still with a chance of light snow.
PMC - Split

Douglas scale
State of the sea Description Waves average height (m)
0 calm (glassy) 0
1 calm (rippled) 0 - 0.1
2 smooth 0.1 - 0.5
3 slight 0.5 - 1.2
4 moderate 1.25 - 2.5
5 rough 2.5 - 4
6 very rough 4 - 6
7 high 6 - 9
8 very high 9 - 14
9 phenomenal > 14

Beaufort scale
Wind speed Waves height
km/h m/s kt mph m ft
0 Bf calm < 1 0 - 0.2 < 1 < 1 - -
1 Bf light air 1 - 5 0.3 - 1.5 1 - 3 1-3 0.1 (0.1) 0.25 (0.25)
2 Bf light breeze 6 - 11 1.6 - 3.3 4 - 6 4 - 7 0.2 (0.3) 0.5 (1)
3 Bf gentle breeze 12 - 19 3.4 - 5.4 7 - 10 8 - 12 0.6 (1) 2 (3)
4 Bf moderate breeze 20 - 28 5.5 - 7.9 11 - 16 13 - 18 1 (1.5) 3.5 (5)
5 Bf fresh breeze 29 - 38 8.0 - 10.7 17 - 21 19 - 24 2 (2.5) 6 (8.5)
6 Bf strong breeze 39 - 49 10.8 - 13.8 22 - 27 25 - 31 3 (4) 9.5 (13)
7 Bf near gale 50 - 61 13.9 - 17.1 28 - 33 32 - 38 4 (5.5) 13.5 (19)
8 Bf gale 62 - 74 17.2 - 20.7 34 - 40 39 - 46 5.5 (7.5) 18 (25)
9 Bf strong gale 75 - 88 20.8 - 24.4 41 - 47 47 - 54 7 (10) 23 (32)
10 Bf storm 89 - 102 24.5 - 28.4 48 - 55 55 - 63 9 (12.5) 29 (41)
11 Bf violent storm 103 - 117 28.5 - 32.6 56 - 63 64 - 72 11.5 (16) 37 (52)
12 Bf hurricane >= 118 >= 32.7 >= 64 >= 73 14 (-) 45 (-)

Adriatic sub-basins