The upper-level jet stream continues to be displaced south of 40 N latitude across the western North Pacific while an Omega Block is situated over the eastern North Pacific.
NOAA OPC 500 mb Forecast
Storm tracks over the western North Pacific will be mainly between 35N and 40N latitudes with frequent gale to storm (briefly hurricane force) westerlies likely south of lows. These conditions will adversely affect westbound shipping bound for East Asian ports.
NOAA OPC Surface Forecast
In addition, Santa Ana winds are expected to push into Southern California over the next few days.
Intense storms over the South Atlantic will be producing heavy 5-8 meter long-period swells of 12-15 seconds from the Southwest in the waters off South Africa during the next couple of days. Wave heights likely will be enhanced within the Agulhas current.
Significant wave heights. Image credit windy.com
The upper-level Jet continues to be displaced south of 40 N latitude over the western and central North Pacific which will result in persistent gale to storm force (briefly hurricane force) westerlies between 30N and 40N latitudes. Westbound shipping traffic may experience additional delays.
NOAA OPC 500 mb Forecast Chart
NOAA OPC Significant Wave Height Forecast
The upper-level Omega Block is re-establishing over the northeastern North Atlantic with a semi-stationary upper cut-off low situated south of the Azores for the next several days which will shunt low tracks N-NE towards Greenland and Iceland and away from the UK and Northwest Europe.
Omega Block over the northeastern North Atlantic
NOAA OPC 72 hour Surface Forecast
The Omega block is an upper-air pattern where the strong wind belt looks like the Greek letter Omega Ω .
The Omega block is often associated with two cut-off lows with one blocking high sandwiched between them. Storm tracks will be diverted northward instead of eastward with semi-stationary surface lows situated to the southwest and southeast of the block (in the northern hemisphere).
A rapidly deepening storm off the US East Coast will move NE rapidly producing winds of 50-65 knots increasing to 60-70 knots over the next 24 hours. Heavy freezing spray conditions likely in the Gulf of St. Lawrence as well as the waters around Nova Scotia and Newfoundland.
NOAA OPC 1200 UTC Surface Analysis
NOAA OPC 24 Hr Surface Forecast
A developing storm low is forecast off the USEC during the next 48 hours producing storm force winds increasing to hurricane force with heavy freezing spray conditions likely along the coasts of Newfoundland and Nova Scotia as the storm moves N-NE across Newfoundland and off the coast of Labrador 15th-16th January.
NOAA OPC 48 hour Surface Forecast
NOAA OPC 72 hour Surface Forecast
Moderate to fresh northeasterly Monsoon prevails over Arabian Sea. Prevailing high pressure ridge extends across the South Indian Ocean between 30S to 42S latitudes. Moderate to fresh easterlies prevail north of the ridge except becoming fresh to strong southeast of a weak low expected to develop southeast of Madagascar. Possible tropical cyclone development near 15 S/90E over the weekend. South of 42 S fresh to near gale westerlies likely.
Forecast 1200 UTC Friday 145 January
A strong blocking high continues over the UK with a ridge eastward into North Europe. This pattern will continue shunting lows north-northeast towards Iceland for at least a few more days before gradually weakening.
NOAA OPC Eastern North Atlantic Surface Analysis
TS Tiffany IR image NOAA
Tropical Cyclone Tiffany has formed north of Cairns, Australia and is rapidly deepening as it moves west at 7 knots with max winds currently at 50 knots. Conditions favor continued development until landfall around 0900 UTC 9 January with max winds about 60 knots.
Thereafter, Tiffany will weaken overland but will emerge over the Gulf of Carpentaria where it will re-strengthen and possibly reach hurricane intensity just prior to a 2nd landfall near Groote Eylandt in about 72 hours.
TS Tiffany Forecast Track (JTWC)