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2009 Hurricane Season
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Bill Turns Extratropical; Hilda Nearly a Hurricane
Surfersvillage Global Surf News, 24 August, 2009 : - - The cooler waters of the North Atlantic have taken a toll on Bill as it has transitioned to a strong non-tropical low pressure center. Bill continues to move quickly away from Newfoundland at about 40 mph. In the East Pacific, Tropical Storm Hilda will continue to track westward for the next several days. Meanwhile, an area of disturbed weather about 700 miles southwest of Baja California may become a tropical depression within the next day or two. In the Western Pacific, Typhoon Vamco remains over open waters well northwest of Wake Island. Vamco will track north, then north-northeastward over the next few days. Sroll down for more info.
Hurricane Bill : image courtesy NOAA click to enlarge
Atlantic Ocean
Bill Loses Tropical Characteristics, Other Areas of Atlantic Interest
Update: 24 Aug 2009 08:32am EDT - As of mid-morning Monday EDT, Bill was located about 300 miles northeast of Cape Race, Newfoundland, and was racing northeast at speeds greater than 40 mph. Since Bill has lost tropical characteristics and has pulled away from Atlantic Canada, all tropical storm watches and warnings have been discontinued for Nova Scotia, Prince Edward Island and Newfoundland. In addition, the rough surf, high waves and rip currents along the east coast of the United States should subside later today. Bill will continue to speed east-northeast the next few days over the open waters of the northern Atlantic. By midweek, the powerful extra tropical low will bring heavy rain and gale-force winds to the British Isles.
Elsewhere in the tropics, there are several areas of interest we are closely monitoring. The first wave is located near 25.5 west, south of 20 north moving west at 15-20 knots. Another tropical wave is along 71 west, south of 17 north moving west at 15-20 knots with only scattered convection.
North Atlantic infrared satellite - Click image to enlarge
![[Image of 5-day forecast of predicted track, and coastal areas under a warning or a watch]](http://dadecosurf.com/images/tanal.1.gif)
Current Atlantic Surface Weather Analysis (tropical waves) : Click image to enlarge
A more significant, large tropical wave is located along 55 west between 13 and 20 north. This wave is moving quickly to the west at 20-25 knots and is currently interacting with an upper low. Convection associated with this wave extends between 51 and 60 west. Computer models do take a piece of this wave and try to develop low pressure along the northern end over the next few days with some models having the low east and northeast of the Bahamas by the middle of the week. While not initially having tropical characteristics, this system will be watched for possible tropical development with time as it moves into a more favorable environment.
Tropical Storm Hilda : image courtesy NOAA click to enlarge
Eastern Pacific
Hilda Still a Tropical Storm, Expected to Strengthen
Update: 24 Aug 2009 11:28am EDT - Tropical Storm Hilda continues to move steadily westward across the central Pacific Basin. As of 5 a.m. HST, or 11 a.m. EDT, it was centered near 14.4 north and 145.4 west. It is moving west at 13 mph with maximum-sustained winds of 65 mph. Conditions appear conducive for gradual strengthening over the next couple of days. However, some inhibiting factors to any quick strengthening include marginal sea surface temperatures and some easterly wind shear.
More favorable conditions will develop Tuesday into Wednesday as the shear relaxes. This will allow Hilda to become a hurricane as the forward speed slows by this time as well. We expect Hilda to continue on a track slightly north of due west for the next several days, passing south of Hawaii through the week.
Pacific infrared satellite - Click image to enlarge
Another area of low pressure is located around 730 miles southwest of Baja California, and thunderstorms are continuing to become better organized near the center. Waters are very warm in this area and winds aloft are weak, so conditions are quite conducive for this low to develop into a tropical depression within the next day or two as it continues west.
Typhoon Vamco : image courtesy NOAA click to enlarge
Western Pacific
Update: 24 Aug 2009 10:14am EDT - As of Monday morning, EDT, Typhoon Vamco was located near 32.1 north and 155.0 east, or more than 1,100 miles northwest of Wake Island. The storm has maintained its intensity during the past 24 hours and currently packs maximum-sustained winds of 100 mph with gusts to 120 mph. Motion is toward the north at 13 mph.
Although the storm has been tracking north into higher latitudes, it has maintained its strength and is likely to remain near its current intensity over the next 24 hours, although Vamco continues to expand and become less symmetric. An approaching trough will cause Vamco to accelerate northeast, weakening and becoming extratropical sometime on Wednesday. The storm should not be a threat to land along its projected path.
Elsewhere in the Western Pacific, no other areas show signs of tropical development at this time.
Satellite Imagery
Hurricane links:
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