On diametrically opposite sides of the globe, two huge tropical storms are exerting their might on the weather.
Tropical Cyclone MANGKHUT-18, by far the bigger storm, is moving more or less due West across the Philippines, and threatening, China, Guam, Northern Mariana Islands, and Vietnam, with maximum wind-speeds expected to be in the 280km/h range. The estimated population affected by winds in excess of 120km/h is nearly 7 million.
The northern tip of the Philippines have already been battered, and, as I write this on Saturday afternoon, the eye of the storm is East-Northeast of the tip of the Philippines, and bearing down on the coast of China, just South of Hong Kong. Its projected path will take it Westwards along the border of China and Vietnam, just North of Hanoi.
There are an awful lot of people living in those areas, in dwellings not very cyclone-proof, houses which have probably been destroyed and rebuilt many times by previous cyclones, and the population of 7 million threatened are therefore very vulnerable. We’ll keep watching the news dispatches for further detail.
On the other side of the globe, the Federal Emergency Management Agency (FEMA) already had advanced plans and deployments in place for Hurricane FLORENCE, a Category 4 storm, approaching the Carolina States of the USA in a North-Easterly direction. By Monday just gone, FEMA had already positioned more than 80,000 litres of water, 402,000 meals, 1,200 cots and 34 generators at Fort Bragg near Fayetteville, North Carolina.
The projected path of Florence had it crossing the coast of North Carolina on Friday morning at about 7am our time. Wind-speeds of about 250km/h were expected as it crossed the coast.
The ARRL reported that it shipped seven Ham Aid kits to South Carolina by way of Georgia on September 11, to assist with emergency preparedness needs in advance of Hurricane Florence. These kits are the same ones that ARRL volunteers took to Puerto Rico a year ago to assist with disaster communications following Hurricane Maria.
“South Carolina ARES is fully activated,” ARRL South Carolina Section Emergency Coordinator Billy Irwin, K9OH, told ARRL, adding that he’s been coordinating regularly with the state Emergency Management Division. “We have operators serving 12-hour shifts at the SC Emergency Management Division and will move to 24-hour coverage on Thursday. Two operators have been deployed to Berkeley County to assist with shelter operations at the request of the Emergency Coordinator there.” Irwin said information about frequencies in use is in the Tactical Guide on the South Carolina ARES website.
“We are literally modifying plans on the fly to meet the needs of the mission,” Irwin added. “Several ARRL Sections have offered assistance.”
The Hurricane Watch Net (HWN), at Alert Level 3, was closely monitoring three systems, Hurricane Florence, Tropical Storm Isaac, and Invest 95L, currently in the Gulf of Mexico. The net shifted its formal activation to Thursday, September 13, at 1300 UTC, as Florence closed in on the US east coast. The net activated on both its 14.325 MHz and 7.268 MHz frequencies and remained active around the clock, as needed. “Hurricane Florence is drawing a lot of concern for its size and strength, but more so for the potential flooding,” Assistant HWN Manager Stan Broadway, N8BHL, said.
HWN stations will be on both frequencies throughout the day and evening on Wednesday, September 12, to talk with stations in the coastal states. “We want to log their locations, their weather instrumentation and other pertinent information, so that when they are actively producing storm reports we already have them in the database,” Broadway said. “This will speed the reporting process Thursday and Friday as the storm does make landfall.”
WX4NHC at the National Hurricane Centre remained active through Friday, September 14, operating cooperatively with the HWN as net stations funnelled ground-level reports to the Centre. WX4NHC will monitor the HWN and the VoIP Hurricane Net (VoIPWX).
The Salvation Army Team Emergency Network (SATERN) announced plans to activate for Hurricane Florence from 1700 through 2100 UTC on Thursday, September 13, and to reactivate on Friday and Saturday at about 1600 UTC until propagation no longer supported it, or the Net Manager closed the net for the day.
And as I compiled this yesterday afternoon, ARRL News reported that the Hurricane Watch Net (HWN) announced that it shut down its activation for Hurricane Florence, now downgraded to a Tropical Storm but still “a formidable system that will affect the coastal states for days,” HWN Assistant Manager Stan Broadway, N8BHL, said. “Because the storm is moving inland, Amateur Radio activity will shift to the various state and regional emergency nets,” Broadway added.
“While propagation was not good on 20 meters for the period, 40 meters afforded a fairly consistent contact with stations in the area,” Broadway recounted. “The net has been in operation for 38 hours.”
Over the course of its activation, listening for reports and relaying them to the National Hurricane Centre (NHC) via WX4NHC, nearly 200 stations checked in, and the net took in approximately twice that number of reports.
“Many were not at severe levels, but all ‘ground truth’ [reports] assist in plotting the activity of the storm,” Broadway explained. WX4NHC will remain active through Friday.
As of 0000 UTC on September 15, the centre of Florence had moved into extreme eastern South Carolina, the National Hurricane Centre reported. “Life-threatening storm surges and strong winds will continue tonight,” the report said, “[with] catastrophic freshwater flooding expected over portions of North and South Carolina.”
The storm was some 15 miles north-northeast of Myrtle Beach, South Carolina, and about 55 miles east-southeast of Florence, South Carolina, with maximum sustained winds of 70 MPH. Florence was moving to the west at a leisurely 3 MPH.
And, if you want a live feed from the Carolina Beach, Wilmington area, visit https://www.facebook.com/derekvandamfanpage/videos/ to see daily reports from Derek van Dam.
This is Dave Reece ZS1DFR reporting for HAMNET in South Africa.