On Monday morning, Suriga’s maximum wind speed decreased to 140 mph (220 km / h). Although it is no longer a super typhoon, it is still a powerful typhoon, equivalent to a Category 4 Atlantic hurricane.
This means that winds of more than 37 mph and 75 mph (60 kilometers per hour and 120 kilometers per hour) are likely to run within the next 24 hours. Additionally, heavy rainfall is expected in these areas which can cause floods, flash floods and rain-induced landslides. The last two days had received 6 inches (146 mm) of rain, measured in Catalogen and 4 inches (97 mm) in Guiyan, in the province of Viesses.
Super Typhoon Suriga began to move slowly toward the Philippines after it developed earlier this week, rapidly on Friday and then on Saturday. Intense intensity occurs when a tropical cyclone strengthens 35 mph in a 24-hour period.
This high intensity was caused by ideal conditions for thunderstorm development: wind shear, or the change of wind speed and direction with altitude in the atmosphere, has been very low. High wind shear can tear such storms to pieces, but low shear allows them to keep away from extremely hot water and thrive in a powerful storm.
The constant low shear and excellent outflow will allow the Suriga to flourish in warm water running a few degrees above normal for this year.
Forecasts remain consistent to keep track of Suriga by making landfall on the Philippines. It will run parallel to the central and eastern Philippines before turning north towards southern Japan. A pool of low pressure from that area would potentially move the storm away from any other populated areas.
Although the Suriga remained offshore this weekend, it would need to be monitored the following week as it slowly moves northwest and north.
How much the storm’s windfall will determine for the northeastern parts of Luzon. Some weather forecasting models show hurricanes approaching extremely close to this stretch of the Philippine coast by Tuesday and Wednesday, but other models and official forecasts remain far-fetched, with limited impacts.
CNN meteorologists Hailey Brink and Jean Norman contributed to this report.