Tropical Storm Hanna

Tropical Storm Hanna is packing 35-kt (40-mph) winds, moving ESE at 4 kt (5 mph). Expected to stay over open water.

At 900 AM GMT (0900 UTC), the center of Tropical Storm Hanna was located near latitude 33.5 North, longitude 43.9 West. Hanna is moving toward the east-southeast near 5 mph (7 km/h). A turn toward the east-northeast is expected later today with an increase in forward speed on Thursday. Maximum sustained winds are near 40 mph (65 km/h) with higher gusts. Gradual weakening is expected today and Hanna should become a post-tropical remnant low by tonight. Tropical-storm-force winds extend outward up to 70 miles (110 km) from the center. The estimated minimum central pressure is 1006 mb (29.71 inches).— National Hurricane Center · public advisory 8

Hanna tracks over open water — no coast is in the outlook. Along its path, our forecast reads:

This is the Atlantic · 32°N–39°N, 46°W–29°W. Hanna’s forecast track is the dotted spine — the labelled dots mark its position each day. Every cell is shaded by how many hours it spends inside Hanna’s gale-force (≥34 kt · 39 mph) wind across the whole forecast, the damaging core counted double.

Read it two ways at once. Colour is the total — the hours of gale-force wind a place piles up. A slow storm writes its danger in duration, not in any single gust, so the longer the wind sits over a place, the deeper its colour. Opacity is confidence — solid where the official probability of that wind is high, faint where it is only a chance. So a deep, solid cell is a place the wind will work for a long time and likely will; a pale, faint one is a brief, uncertain brush at the edge of the cone.