News

Hurricane Joaquin Advisory No. 1 and more from experts

NOAA Joaquin forecast as of Wednesday evening.

NOAA Joaquin forecast as of Wednesday evening.

By Peter Vankevich and Connie Leinbach

For Ocracokers, it is time to start taking this hurricane seriously.

The island is saturated, and this could add to the loss of trees as well as cause more flooded land and road blockages. Additionally, be prepared that the ferry system will shut down once conditions become dangerous.

The first advisory has  now been  issued.

Hyde County Monitoring Hurricane Joaquin;
Preparing to Make Emergency Declaration Decision
 
Hyde County officials are monitoring Hurricane Joaquin in terms of its potential impact to Ocracoke Island and mainland Hyde County. Based on the 2 p.m. advisory from the National Hurricane Center, tropical storm force winds are expected to start impacting Ocracoke Island on Sunday, Oct. 4.
Joaquin is also likely to result in high seas, several inches of rain, flooding and strong winds.
In consideration of the recent heavy rain and minor flooding, Hyde County officials will allow extra time for any emergency actions.
An emergency meeting of the Hyde County Board of Commissioners is scheduled for at 5 p.m. Thursday, Oct. 1, to discuss preparations for Hurricane Joaquin. The public should start preparing now for the storm and be ready to take decisive action if emergency declarations are made.

The National Hurricane Center of the National Weather Service clarifies the difference between a warning and a watch.

A warning is issued when a hazardous weather or hydrologic event is occurring, is imminent, or has a very high probability of occurring. A warning is used for conditions posing a threat to life or property.

A watch is used when the risk of a hazardous weather or hydrologic event has increased significantly, but its occurrence, location, and/or timing is still uncertain. It is intended to provide enough lead time so that those who need to set their plans in motion can do so.

 On the Weather Underground website, Jeff Masters and Bob Hanson are voicing conerns that this major storm could strike Ocracoke or very close by.

Hurricane Joaquin Forecast Discussion

HURRICANE JOAQUIN DISCUSSION NUMBER 12 NWS NATIONAL HURRICANE CENTER MIAMI FL AL1120155 PM EDT WED SEP 30, 2015

There has been little change in the organization of Joaquin during the past several hours. While the hurricane continues to produce cloud tops colder than -80C in the eyewall, the eye has not become better defined since the last advisory. Satellite intensity estimates are 77 kt from both TAFB and SAB, so the advisory intensity is now 75 kt. The initial motion is 225/7.

The shortwave ridge causing this motion is expected to weaken during the next 24-48 hours as a strong deep-layer trough develops over the southeastern United States. Thus, a generally southwestward motion is expected for the next 36 hours or so, followed by a turn toward the north as the trough becomes the dominant steering mechanism.

There is an increased disagreement between the GFS, UKMET, Canadian, and NAVGEM models versus the ECMWF since the last advisory. The ECMWF has continued its forecast of showing a northeastward motion after 72 hours, taking Joaquin just west of Bermuda and out to sea.

The other models have all shifted their forecasts to the left and now call for landfall in the Carolinas and the mid-Atlantic states, followed by merger with the baroclinic trough. Given the shift in the non-ECMWF models, a major westward adjustment has been made to the forecast track at 96 and 120 hours, bringing the center of Joaquin near or over portions of the mid-Atlantic states.

Due to the use of the ECMWF in the consensus models, the new track lies near the various consensus models. However, it lies well to the east of the GFS and the other similar models. The NOAA G-IV jet is currently flying a synoptic surveillance mission, which, along with special rawinsonde launches, hopefully will reduce the spread of the guidance. There is little change to the intensity forecast philosophy since the last advisory.

Joaquin is expected to remain in an environment of moderate northeasterly vertical shear for the next 24-36 hours, possibly including strong winds seen at 400 mb in recent dropsondes from the G-IV aircraft. However, since it has been steadily strengthening in such an environment, there is no obvious reason to think it will stop doing so. After 36 hours, the hurricane is likely to move into an area of divergent southerly upper-level winds associated with the eastern U. S. trough. While there is uncertainty as to how much shear should occur, it is expected that additional intensification could occur through at least 48 hours.

Based on this, the intensity forecast calls for Joaquin to peak as a major hurricane in 48-72 hours, and it is possible it could be stronger than currently forecast. After 72 hours, increasing shear, cold air intrusion, and land interaction should cause weakening and the start of extratropical transition.

KEY MESSAGES: 1. Preparations to protect life and property within the warning areas in the Bahamas should be rushed to completion. 2. A significant adjustment to the forecast has been made this afternoon, and this shows an increased threat to the mid-Atlantic states and the Carolinas. However, confidence in the details of the forecast after 72 hours remains low, since we have one normally excellent model that keeps Joaquin far away from the United States east coast. The range of possible outcomes is still large, and includes the possibility of a major hurricane landfall in the Carolinas. 3.

Every effort is being made to provide the forecast models with as much data as possible. The NOAA G-IV jet has begun a series of missions in the storm environment, and the National Weather Service is launching extra balloon soundings. 4. Because landfall, if it occurs, is still more than three days away, it is too early to talk about specific wind, rain, or surge impacts from Joaquin in the United States. Even if Joaquin stays well out to sea, strong onshore winds will create minor to moderate coastal flooding along the coasts of the mid-Atlantic and northeastern states through the weekend. 5.

A hurricane watch for a portion of the U.S. coast could be required as early as Thursday evening. 6. Many areas of the eastern U.S. are currently experiencing heavy rains and gusty winds associated with a frontal system. This inclement weather is expected to continue over the next few days, which could complicate preparations for Joaquin should it head toward the coast, and greatly exacerbate the impacts from the hurricane.

Heavy rains are likely to continue over these areas even if the center of Joaquin stays out to sea.

 

Categories: News

Tagged as: ,

1 reply »

  1. Rule of Thumb on Ocracoke: it’s always way too soon to leave in the event of a storm. No one really knows fer sure, and hey, what could happen in a CAT 1 after all? Just maybe an Alex and such. Listen to the locals. Always. Like the Gospels, they will always get you back home safely.

    Hyde Emergency Management Rule of Thumb: For Ocracoke, please add 1 day to evacuation time in the event of a storm. Ferries will shut down. 12 North may be washed out. Winds can shut down Bonner before you get there. Southern ferries best bet to evacuate.

    Touristas: we can use the extra time off! Thanks but no thanks for the exaggerated warning. We know your weather better than you do. And why did they shut down the ABC store?

    We are local and leaving. Good luck to all of you. And Gawd bless the trees.