Tomorrow.ioTomorrow.io THE ATMOSPHERE TODAY · DESK← TODAY'S COVER
DESK

⚓Maritime

Sep 20, 2026 · NO. 0920
THE READ — what this desk must decide today

island ferries under a transitioning typhoon, a coastal cyclone in southern Brazil, and a strengthening bura on the Dalmatian coast

The sea keeps the wind story even after the land stops caring about it. A storm can be easing in the wind column and still leave the Izu Islands run unworkable — swell and the offshore Boso pass on Monday morning are the operative facts for a harbourmaster, not the pressure. Off Rio Grande do Sul an extratropical cyclone peaks today with gusts to 100 km/h and hail across RS, SC and Parana, which is a port-closure and small-craft decision now rather than a forecast. On the Dalmatian coast the footprint's forecast bura reaches about 80 km/h at the Velebit crossing and 71 km/h at the Gruz quay on Sep 20-21 — enough to matter for ferry sequencing to Brac, Hvar and Korcula, and carried as a watch signal because there is no official orange in force. The Azores depression is the one wind story that is not a maritime problem: 35 mph over open water with no land threat.

THE DRIVERS 1–12h — what is driving this desk today
TYPHOON DUJUAN — THE WIND EASES AS IT TURNS ONTO TOKYO, AND THE RAIN IS WHAT ARRIVESCRESTING→RIO GRANDE DO SUL — THE COASTAL EXTRATROPICAL CYCLONE REACHES ITS PEAKPEAK→THE SOUTH-DALMATIAN COAST — A TWO-DAY TEMPERATURE PEAK WITH A STRENGTHENING BURA BESIDE ITCRESTING→SOUTH-WEST OF THE AZORES — A DEPRESSION WITH ITS ENDING ALREADY IN THE FORECASTEMERGING→
THE RECORD past — how exposed this desk has run

carried on 31 of the last 66 editions — since Aug 4, the 10 most recent shown.

Sep 20THE WIND EASES AS IT TURNS ONTO TO… · THE COASTAL EXTRATROPICAL CYCLONE … · A TWO-DAY TEMPERATURE PEAK WITH A …
Sep 19the line crossed · the window became an extratropical… · Great Lakes today
Sep 18large · The East Pacific lit three areas a… · Orange 6 and Orange 5
Sep 17named · the genesis engine ramps as its ra… · a red flash-flood run dated throug…
Sep 16east of Saipan · a last hot pulse · a red flash-flood run now dated th…
Sep 15THE EASING SLIPPED A DAY AND THE W… · A FRESH NORTH-BAY-OF-BENGAL LOW FO… · A LAST HOT PULSE CRESTS ON THE SOU…
Sep 13A CUT-OFF LOW RE-ARMS SOUTH AFRICA… · THE RED IS DOWN TO ORANGE AS THE B… · ONE LAST HOT DAY PEAKING SEP 14 ON…
Sep 12THE RED HELD A SECOND MORNING · THE DEADLY OUTBREAK HAS PASSED SOU… · NEAR HURRICANE STRENGTH AT 65 MPH
Sep 11A RED WARNING THAT WALKED SOUTH ON… · AN ORANGE-TIER OUTBREAK ON THE TRO… · A FINAL ADVISORY
Sep 8A CATEGORY-2 LOWELL AT CLOSEST APP… · MARIE WEAKENING OFFSHORE · 28.0 CM