St Kitts and Nevis Meteorological Forecast

This weather forecast, valid until 8 PM on Tuesday, September 23, 2025, predicts unsettled weather conditions influenced by a potent tropical wave. The forecast highlights the potential for significant rainfall and associated risks, particularly the possibility of a flash flood watch being issued by Tuesday afternoon. Temperatures are expected to range from a high of 33°C (91°F) to a low of 24°C (75°F), creating a warm and humid environment conducive to the development of showers and thunderstorms.

The forecast details the anticipated weather patterns for both the night of September 22nd and the day of September 23rd. For the night of the 22nd, partly cloudy skies are expected with a moderate 40% chance of showers developing primarily after midnight. This suggests an increasing likelihood of precipitation as the tropical wave approaches. The forecast for September 23rd predicts mostly cloudy conditions with showers and thunderstorms throughout the day. The intensity of these showers is expected to vary, with periods of moderate to heavy rainfall anticipated. This reinforces the potential for localized flooding, especially given the predicted rainfall accumulation.

The forecast emphasizes the potential for substantial rainfall, with accumulations of up to 25.4 mm (1 inch) expected. This amount of rainfall within a short period can overwhelm drainage systems and lead to flash flooding, hence the potential issuance of a flash flood watch. Residents in the affected area should monitor weather updates closely and take necessary precautions to prepare for potential flooding. This might include clearing drainage areas, securing loose outdoor items, and avoiding low-lying areas prone to flooding.

Wind conditions are also a significant component of the forecast. East winds are expected on the night of the 22nd, transitioning to east-southeast winds on the 23rd. Wind speeds are predicted to range from 17 to 31 km/h (10 to 20 mph), with potential gusts reaching as high as 50 km/h (31 mph). These relatively strong winds, coupled with the heavy rainfall, could contribute to challenging conditions, including reduced visibility and potential damage from falling debris or tree limbs.

The marine forecast predicts sea conditions with wave heights ranging from 0.3 to 1.5 meters (1 to 5 feet). While these wave heights are not exceptionally high, they could still pose risks to small craft and coastal activities. Boaters and individuals engaging in water sports should exercise caution and monitor weather conditions closely before venturing out.

Finally, the forecast provides sunrise and sunset times for September 23rd. Sunrise is predicted to occur at 6:01 AM, while sunset is expected at 6:07 PM. These times provide a helpful reference for planning outdoor activities and understanding the duration of daylight hours. Overall, this forecast paints a picture of unsettled weather conditions with the potential for significant rainfall, strong winds, and associated risks such as flash flooding. Residents and visitors in the affected area should remain vigilant and heed any warnings or advisories issued by local authorities.