Hurricane Season Update

Hurricane Season Hits Pause, But Isn’t Over

by Brett Israel
Date: 16 September 2011 Time: 04:05 PM ET
hurricane maria hits newfoundland

 

Hurricane Maria heads toward Newfoundland today, but there are no storms behind it….for now.
CREDIT: NOAA/NASA GOES-13 satellite.

Mid-August marked an uptick in the number of tropical storms and hurricanes forming in the Atlantic Ocean, with one storm always seeming to follow on the heels of another. But lately, the tropics have quieted down.

Hurricane Maria, the third hurricane of the 2011 season, is expected to hit Newfoundland, Canada, today (Sept. 16), but there are no other tropical cyclones (hurricanes and tropical storms) after this one the radar. But don’t think for a second that hurricane season is headed for an early exit, experts say.

“In no way, shape or form is this season over,” said Dennis Feltgen of the National Hurricane Center in Miami.

If, for some odd reason, no other tropical storms were to form this year, it would be the earliest end ever for an Atlantic hurricane season. The earliest date in the satellite era of the last active tropical cyclone in a given year was Sept. 21, 1993. Hurricane season officially ends Nov.1.

Feltgen and others say we’re not likely to set a new record this year.

“I would be incredibly surprised if Maria was the last tropical cyclone in the Atlantic,” said Phil Klotzbach, an atmospheric scientist at Colorado State University in Fort Collins. “While it looks like we’re going into a somewhat quieter period for a little bit, it’s not that unusual to have a quiet period during an active season,” Klotzbach said.

This season was predicted to be a doozy, with 14 to 19 named storms (which include tropical storms and hurricanes), seven to 10 hurricanes and three to five major hurricanes (Category 3 or higher). So far there have been 14 named storms (Nate formed shortly after Maria, but dissipated after striking Mexico shortly after it developed), three hurricanes and two major hurricanes (Irene and Katia).

The tropics seem to have quieted down as storms shift their birthplace to the west in the Atlantic basin. At the beginning of the season, tropical cyclones form near Cape Verde, off the coast of Western Africa. Toward the end of the season, they begin closer to the West Caribbean. This puts the southeastern United Sates in the crosshairs. October is typically an active month for that region.

Most of the global models suggest that another storm should develop in about nine days, Klotzbach said. And with the warm Atlantic waters and La Niña’s return — which has been linked to active hurricane seasons — more big storms could be on the way.

from:   http://www.livescience.com/16104-hurricane-season-lull.html

“It’s nice we got a little chance to breathe and collect our thoughts, but we are far from over,” Feltgen said.

Update on Storm Activity in the Tropics

Posted by: JeffMasters, 2:25 PM GMT on August 14, 2011 +3
The latest in our unusual number of weak tropical cyclones this season, Tropical Depression Seven, has formed to the southeast of Bermuda. Unless you live in Bermuda, TD 7 is not going to be a concern. Radar out of Bermuda shows an area of rain on the northern side of TD 7 beginning to approach the island, and rain from the storm will likely affect the island tonight and on Monday. TD 7 is not well-organized, and has only limited heavy thunderstorms, as seen on visible satellite images. While wind shear is a low 5 – 10 knots, dry air surrounds TD 7, and is keeping the storm from intensifying. None of the computer models foresee that TD 7 will ever become more than a weak tropical storm.


Figure 1. Morning satellite image of TD 7.

92L
TD 7 isn’t the only system Bermuda needs to watch, Invest 92L is a day behind it, and will follow a path very similar to TD 7’s. The disturbance will pass close to Bermuda on Tuesday, bringing the island a second round of tropical rains. However, Invest 92L is very disorganized, as seen on recent visible satellite loops. Dry air and close proximity to TD 7 will likely keep 92L from showing significant development over the next two days, with NHC giving the system just a 30% chance of developing into a tropical depression by Tuesday morning.

Elsewhere in the tropics
The disturbance midway between the Lesser Antilles Islands and the coast of Africa we’ve been tracking over the past few days, Invest 93L, has fallen apart and is no longer a threat to develop. This system will need to be watched once it enters the Caribbean later this week, though. None of the reliable models for predicting tropical cyclone formation predict development of this system or any new disturbances over the coming week.

Jeff Masters

NOAA Downgrades Predicted Number of Tropical Storms This Season

NOAA still sees big potential for hurricanes

BY JENNIFER KAY

THE ASSOCIATED PRESS

PENSACOLA, Fla. — Record high ocean temperatures and the development of a climate phenomenon known as LaNiña will keep the Atlantic hurricane season on track to be the busiest since 2005, government forecasters said Thursday.

The National Oceanic and Atmospheric Administration slightly lowered the outlook it released in May, but an above-normal season is still expected, said Gerry Bell, lead seasonal hurricane forecaster at NOAA’s Climate Prediction Center in Washington.

The updated forecast calls for 14 to 20 named tropical storms, down from a range of 14 to 23.

The hurricane season started June 1 and ends Nov. 30, but the peak period for hurricanes runs from August through October.

Eight to 12 storms could become hurricanes, and four to six of those hurricanes could become major storms, with winds of 111 mph or more, forecasters said.

“August heralds the start of the most active phase of the Atlantic hurricane season, and with the meteorological factors in place, now is the time for everyone living in hurricane-prone areas to be prepared,” NOAA Administrator Jane Lubchenco said in a statement.

During active storm seasons, multiple hurricane strikes are much

Read more: http://www.miamiherald.com/2010/08/06/2346383/noaa-still-sees-big-potential.html#ixzz1UANVqUtJ