Since yesterday’s updates, we did shift our track more to the west. That was followed by shifts in the NHC track, making our tracks very similar. The forecast could still evolve in future updates, but we do not favor any shift west of an Outer Banks landfall clip and that is our worst case.
Tropical storm force winds are likely as Hurricane Earl makes a brush past the East Coast of North Carolina and Southeast VA during Thursday into Friday. Our current track and intensity projections keep the hurricane force winds (74+ mph) offshore and about 40-50 miles away from the Outer Banks. The chance for hurricane force winds reaching the Outer Banks is near 20%.
Currently a Category 4 Hurricane (131-155 mph), Earl is projected to drop back to a Category 3 (111-130 mph) as it approaches the coast of NC on Thursday. We will note that cooler water, extra shear, and dryer air could help Earl weaken slightly faster than the current forecast. We don’t expect it to be stronger than the current forecast; therefore, the biggest change to our forecast would be a shift in the track that changes our wind projections over land.
Earl will have another close call as it passes near Cape Cod on Friday night into early Saturday morning. It will continue to weaken, but we expect it to pass over the Canadian Maritimes as potentially a Category 1 Hurricane this weekend.
Our primary impact potential is confined to coastal areas of NC and southeastern VA. Our current track and intensity projections will produce tropical storm force winds (39-73 mph) across the Outer Banks and VA Beach. Near tropical storm force winds are expected across other locations throughout eastern sections of NC and VA. The chance for these winds will steeply diminish toward the west.
Timing also remains constant with the morning update. Showers and thunderstorm chances will increase throughout Thursday afternoon across Eastern NC and into southeastern VA. We expect the winds to pick up throughout the afternoon and the conditions will worsen throughout Thursday night. In the coastal areas that are hardest hit we expect tropical storm force winds to last 6-12 hours. Sustained winds of 55-65 mph are likely for coastal areas during that time. Some gusts into the hurricane force range are also likely given the current track.
We currently anticipate the bulk of the heaviest rain, over 3 inches, to stay off the coast; although, areas near and including the Outer Banks into VA Beach could pick up higher amounts depending on how this storm evolves.
With the strong onshore winds from Thursday afternoon into early Friday morning, we are continuing to monitor coastal flooding potential.
In addition to Hurricane Earl we are watching two other areas in the Atlantic. Our next potential impact will be what is currently Tropical Storm Fiona. Based primarily on historical probabilities it still has a similar chance to that of Earl of impacting the US East Coast; however, the model guidance is not all in agreement with that idea. There is also some uncertainty with how Fiona will develop. Over the coming days we will have a better idea about any potential impact from Fiona early next week. Another disturbance in the Atlantic could eventually develop and could progress toward the United States.
Finally it is important to note that afternoon or evening thundershower potential remains in place for Western, Northern and into Central VA during Friday afternoon and evening. As a front approaches from the west in the wake of Earl we will be monitoring potential for any impacts from storms. Present indications are that the threat will remain minimal.