La Tropical Storm Erin has begun its transit in the eastern Atlantic, just to west-northwest of Cape Verde, with the potential to remain oceanic for more than a week, requiring constant monitoring by meteorological services.
A las 11 a.m. EDT Monday, Erin was located almost 300 miles (about 480 km) from the Cape Verde Islands, moving towards the west at 20 mph (32 km/h) with maximum sustained winds of 45 mph (72 km / h). For now, There are no warnings or coastal surveillance.
Training, environment and background
The first satellite analyses detected a small but well-defined circulation thanks to scatterometer passes, with light to moderate shear (around 10 knots) and a humid atmosphere at mid-levels (around 60% relative humidity). This combination favored the development of nighttime showers and thunderstorms around the center.
The sea surface temperatures Under this system they were hovering around 26 ° C, right on the threshold for tropical development. In the NOAA historical record, in 174 years only about 41 storms have formed or passed within 200 miles of Erin's approximate initial position (17,4°N, 28,0°W).
Climatologically, the fifth named storm in the Atlantic usually appears around August 22th, XNUMX, while the first hurricane usually appears near the August 11th, XNUMXThe current season is somewhat ahead of schedule in the number of named systems, but no hurricanes have yet been recorded; Erin could be the first midweek and, if conditions remain favorable, could reach a higher category during the weekend.
The region where Erin formed has produced very different systems in the past. Although most recurve northward in the open sea, some cases of historical interest include:
- Florence (2018): after weakening before making landfall, it caused catastrophic floods in North Carolina.
- Irma (2017): 5 category in the northern Leeward Islands, with severe damage in Cuba and a significant impact in Florida.
- Glory (1985): reached Long Island as a hurricane 1 category after weakening from category 4.
Probable trajectory and intensity in the coming days
Prediction models show a unusual consensus on a strengthening Erin's during the week. There is a high probability that it will reach hurricane intensity in the short term and the potential to become major hurricane towards the weekend. The system's compact structure allows for rapid intensity changes, both up and down.
The estimated path indicates that Erin will move over increasingly warmer waters, beginning around 28 °C midweek and reaching about 29 °C towards Saturday, with a higher heat content in the western Atlantic Ocean. By this time of year, the SST anomalies In that area, temperatures are approximately 1°C above the historical average.
In the short term, a mid-level ridge In the subtropical Atlantic, it will direct its movement mainly towards the west or west-northwest, with light to moderate shear and a humid environment. However, a possible increase in wind shear later in the week could temporarily halt intensification.
Looking ahead to next week, a trough at altitude advancing through the northeast US and Canada could "pick up" Erin, favoring a turn north and northeast just north of the Leeward Islands. The European GFS models and tools tropical AI experiments predict this recurvature, with Bermuda in the area of interest. However, this trajectory won't be confirmed for approximately six or seven days, so small changes in direction could alter the scenario.
Regarding possible terrestrial impacts, it is still premature to make precise predictions. If Erin maintains its intensity as hurricane for several days, it is likely that they will occur prolonged storm surges with high waves, dangerous rip currents and episodes of erosion on the Atlantic coast of North America and in the northern coasts of the Greater Antilles.
The NHC considers Erin to be the main system to follow in the basin in the short term. Other disturbances in the Atlantic have Low probability development and, for now, they do not exist coastal warnings related to Erin.
What should be followed closely
Reinforcement signals to monitor include a persistent convective core, higher symmetry of the system, fall of central pressure and the appearance of eye features in high-resolution images. The scatterometer passes and the nighttime convective maximum will provide information about your organization.
The official guide provides hurricane in the middle of the week and possible 3 category during the weekend. The reduced scale of the system makes it sensitive to incursions of dry air or increases in shear, which can generate oscillate in intensity.
It is recommended to pay attention to the northern Greater Antilles, Bermuda and East Coast of the U.S.Although the highest probability for now is that Erin's center will remain north of the Caribbean if the recurvation occurs in time, it is advisable to follow updates closely.
For navigation, aviation and beach travelers, the recommendation is to periodically consult the NHC official bulletins and local agencies, which provide details about trajectory, intensity and waves.
Erin was trained at western Cape Verde, with winds of 45 mph and moving rapidly westward, driven by increasingly warmer waters and low shear. Forecasts support its elevation to hurricane in brief, with a tendency to turn towards the north and northeast north of the Antilles, with Bermuda on its radar. Although there are no warnings in effect yet, the waves and undertow could spread if it maintains its intensity, making it essential to constant vigilance.