Update 8/3/20 from ARRL: Hurricane Watch Net Reactivates as Hurricane Warning Posted for the Carolinas
With the National Hurricane Center (NHC) expecting Tropical Storm Isaias to become a hurricane again later today and make landfall this evening, the Hurricane Watch Net (HWN) reactivated at 1600 UTC on 14.325 MHz. HWN Manager Bobby Graves, KB5HAV, said the net will shift operations at 2300 UTC to 7.268 MHz, where it will remain until no longer needed by the NHC. A hurricane warning is in effect from the South Santee River in South Carolina to Surf City, North Carolina.
“The center of Isaias will then approach the coast of northeastern South Carolina and southern North Carolina within the hurricane warning area later today,” the NHC said. The center will then move inland over eastern North Carolina tonight, and move along the coast of the mid-Atlantic states on Tuesday and into the northeastern United States by Tuesday night.”
The HWN initially activated on July 31 at 1500 UTC, when Isaias was about 245 miles southeast of Nassau. “During the next 41 hours, we relayed the latest advisories to those in the Bahamas, south Florida, as well as mariners and shortwave listeners, Graves said. “Because Isaias was forecast to regain strength to a Category 1 hurricane, and hurricane watches and warnings remained in effect for the Florida coast as well as areas in the Bahamas, the Net remained activated.” After the NHC dropped all hurricane watches and warnings on Sunday morning, and the storm was no longer believed to become a hurricane, the HWN secured operations on Sunday, August 1.
“During the course of 41 hours, we never received any reports from the Bahamas,” Graves said. “We did hear from many south Florida stations, but the storm was not yet close enough at the time for [that area] to be adversely affected.
As of 1500 UTC, Isaias is forecast to make landfall tonight as a Category 1 hurricane and is expected to bring strong winds and heavy rainfall from the eastern Carolinas to the mid-Atlantic coast tonight and Tuesday. The storm was some 90 miles east-southeast of Brunswick, Georgia, and some 220 miles southwest of Myrtle Beach, South Carolina. Maximum sustained winds are 70 MPH, just a shade below Category 1 hurricane strength.
“We are slowly moving into the heart of the 2020 Atlantic Basin Hurricane Season, so, please do not drop your guard,” Graves advised. “If you haven’t done so already, now would be a good time to review your Family Emergency Plan and review your Emergency Supply Checklist. We have links to download both on our website.”
South Carolina Amateur Radio Volunteers Ready
Although Isaias hasn’t turned into a monster hurricane, radio amateurs from all over South Carolina have been preparing for days as the South Carolina Emergency Operations Center geared up for the storm. Isaias was predicted to make landfall on the border of North Carolina and South Carolina.
“We have been in direct communication with our emergency support function (EFS-2) partners along with many other organizations to ensure our level of readiness is sufficient. Radio checks have been performed at SCEMD (South Carolina Emergency Management Division) and more conference calls among ARES leadership are planned,” said ARRL South Carolina Section Emergency Coordinator Billy Irwin, K9OH. Irwin said information about frequencies in use may be found in the Tactical Guide on the South Carolina ARES website.
From the American Radio Relay League on 7/31/20, Hurricane Watch Net Activating as Hurricane Isaias Approaches US East Coast:
The Hurricane Watch Net (HWN) activated on 14.325 MHz on July 31 at 1500 UTC as Hurricane Isaias [pronounced: ees-ah-EE-ahs] heads toward the US on an uncertain trajectory. The Volusia County, Florida, and State emergency operations centers were reported at a Level 3 (Monitoring) status.
“For years I’ve said, ‘Just when you think you have Mother Nature figured out, she changes her mind,’” HWN Manager Bobby Graves, KB5HAV, said. “Shortly after Advisory 11 for then-Tropical Storm Isaias was issued [at 0300 UTC], an Air Force Reserve hurricane hunter aircraft found that the tropical storm had strengthened to a hurricane. The maximum winds had increased to 80 MPH with higher gusts making the storm a Category 1 hurricane.”
The National Hurricane Center (NHC) forecast for 0900 UTC called for Isaias to strengthen into a Category 2 hurricane during the next 24 hours.
“Unfortunately, Isaias appears to be taking a somewhat similar track along the US east coastline, such as Matthew in 2016 and Dorian in 2019,” Graves said. “Interests throughout the Bahamas, Florida, Georgia, South and North Carolina, and farther north need to keep a close watch on Isaias. This means the Hurricane Watch Net could be running another marathon activation.”
An NHC Advisory issued at 1500 UTC included a Hurricane Watch for portions of the Florida east coast from north of Deerfield Beach northward to the Volusia-Brevard County Line. A Tropical Storm Warning has been issued for portions of the Florida east coast from north of Ocean Reef northward to Sebastian Inlet and for Lake Okeechobee.
As of 1500 UTC, the NHC said the center of Hurricane Isaias was located near latitude 21.7 N, longitude 74.5 W, moving toward the northwest near 16 mph (26 km/h), and a general northwestward motion with some decrease in forward speed is expected for the day or so followed by a turn toward the north-northwest. On the forecast track, the center of Isaias will continue to move near or over the Southeastern Bahamas today. Isaias is forecast to be near the Central Bahamas tonight, and move near or over the Northwestern Bahamas Saturday and near the east coast of the Florida peninsula Saturday afternoon through Sunday.
“On the forecast track, the center of Isaias will continue to move near or over the Southeastern Bahamas today. Isaias is forecast to be near the central Bahamas tonight, and move near or over the northwestern Bahamas on Saturday and near the east coast of the Florida peninsula Saturday afternoon through Sunday.
“Tropical storm conditions are possible along portions of the Florida east coast beginning Saturday, and a tropical storm watch remains in effect. While storm surge watches are not currently needed for this area, they may be required later today, if the forecast track shifts closer to the coast. Heavy rains associated with Isaias may begin to affect south and east-central Florida beginning late Friday night, and the eastern Carolinas by early next week, potentially resulting in isolated flash and urban flooding, especially in low-lying and poorly drained areas. Isolated minor river flooding is possible in the Carolinas early next week,” the NHC said. “Hurricane conditions and dangerous storm surges are expected in portions of the Bahamas today and Saturday, and hurricane warnings are in effect for these areas. Preparations to protect life and property should be rushed to completion.”
The HWN seeks “observed ground-truth data from those in the affected area,” including wind velocity and gusting, wind direction, barometric pressure, and, if available, rainfall, damage, and storm surge. “Measured weather data is always appreciated, but we do accept estimated,” Graves noted.