Category 3 Hurricane Irene tracks northwest through the Bahamas
Hurricane Irene remains a powerful category 3 this afternoon, with maximum sustained winds of 120 mph. Irene is moving northwest through the Bahamas at 12 mph, and its center has cleared the northern edge of Crooked Island. The next islands in the path of Irene are Rum Cay (population 80) and Cat Island (population 1700), which it will encounter later tonight. Irene will track northeast of Long Island (in the Bahamas) over the next 24 hours. George Town has been reporting wind gusts up to around 40 mph this afternoon, and wind speed will likely increase during the next 12 hours as Irene's center passes about 30-40 miles to their northeast. Long Island in the Bahamas will likely see category 1 winds, which begin at 74 mph. Shelters on New Providence and Grand Bahama are open and ready for business, and Grand Bahama International Airport will remain closed until Irene passes.
Irene continues to look well-organized on satellite, especially compared to yesterday afternoon. Since then, intense upward motion, and therefore strong thunderstorm activity, has encompassed the center on all sides, which has led to a well-defined eye. Throughout the morning, Irene's eye wall has shrunk, and a new eye wall could be developing, although it remains unclear at this point. If this is the case, it could lead to some temporary weakening of the hurricane, which would be good for the Bahamas. This afternoon, Irene's hurricane-force winds extend 50 miles from the center, and tropical storm-force winds extend up to 205 miles from the center. Earlier this morning, an Air Force Hurricane Hunter mission investigated Irene and a NOAA Gulfstream (Gonzo) is currently collecting data around the hurricane.

Figure 1. Microwave satellite imagery of Irene captured at 8am this morning. Image source: Naval Research Laboratory.
Track forecast for Irene
NOAA has continued dropsonde missions today, scouring the atmosphere for data as far north as the waters off of South Carolina. Every bit of upper-air data that the models can ingest will lead to better forecasts and decreased uncertainty. These missions are an investment that pay off. Irene will track through the central Bahamas today, the northwestern Bahamas on Thursday, and approach the Outer Banks of North Carolina on Friday. Beyond this there is a bit of divergence in the models. Both the GFDL and the HWRF are forecasting a landfall on Long Island, New York, and the ECMWF continues to suggest a landfall even further west than that. NOGAPS is still the eastern outlier, which misses the U.S. all together and makes landfall in Canada. Today the official track forecast from the National Hurricane Center agrees with the GFS forecast through Saturday morning, and then diverges ever so slightly to the west of that through Monday. It has become clear over the past 3 days that everyone on the East Coast from North Carolina to Maine should be prepared to feel impacts from Hurricane Irene.

Figure 2. Official track forecast provided by the National Hurricane Center.
Intensity forecast for Irene
Irene continues to be embedded in a large envelope of moisture, and wind shear is expected to remain low to moderate, 5 - 20 knots, for the next three days. With water temperatures very warm, 28 - 30°C, these conditions should allow for intensification to a category 4 hurricane (winds of 131 to 155 mph). The only reliable model that's not forecasting this intensification is the GFS, and this is likely due to its relatively course spatial resolution. The National Hurricane Center expects Irene to intensify to a category 4 tomorrow, with a decrease in intensity back to a category 3 on Friday.
Links
For those of you wanting to know your odds of receiving hurricane force or tropical storm force winds, check out the NHC wind probability product.
Wunderground has detailed storm surge maps for the U.S. coast.
Our Wundermap is also a great resource for tracking hurricanes, with the ability to turn on multiple layers of data, including satellite, official track forecast, and current weather observations from not only the U.S. but the Caribbean and Bahamas, as well. Here's a link to get you started.
Angela
Reader Comments
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Circulation looks closed for the most part...NE part is questionable, but probably would pass the test.
*Click image for larger version
If you're within 50-100 miles or so, wobbles can be really important. 500 miles or several days away, overall direction and speed take precedent.
Got this feeling the marine warnings below will be coming inland a bit.
HAZARDOUS WEATHER OUTLOOK FOR SOUTH FLORIDA
NATIONAL WEATHER SERVICE MIAMI FL
610 PM EDT WED AUG 24 2011
FLZ063-066>075-168-172>174-251000-
GLADES-HENDRY-INLAND PALM BEACH-METRO PALM BEACH-COASTAL COLLIER-
INLAND COLLIER-INLAND BROWARD-METRO BROWARD-INLAND MIAMI DADE-
METRO MIAMI DADE-MAINLAND MONROE-COASTAL PALM BEACH-
COASTAL BROWARD-COASTAL MIAMI DADE-FAR SOUTH MIAMI DADE-
610 PM EDT WED AUG 24 2011
...TROPICAL STORM WARNING PALM BEACH WATERS OUT BEYOND 20 NM...
...TROPICAL STORM WATCH REMAINDER ATLANTIC WATERS...
...THUNDERSTORMS ATLANTIC WATERS AND EAST LATE TONIGHT...
thats not good
Could you explain why Irene compresses against the east coast of Florida like that? Does the land heating up during the day cause that much high pressure, that the outer bands of low pressure can't get over land?
Tropical Cyclone Advisory #12
TROPICAL STORM TALAS (T1112)
12:00 PM JST August 25 2011
============================
SUBJECT: Category One Typhoon In Sea Near Mariana Island
At 3:00 AM UTC, Tropical Storm Talas (998 hPa) located near 18.6N 141.2E has 10 minute sustained winds of 35 knots with gusts of 50 knots. The cyclone is reported as moving north at 10 knots
Dvorak Intensity: T2.5
Gale Force Winds
=================
150 NM from the center in southeast quadrant
60 NM from the center in northwest quadrant
Forecast and Intensity
=======================
24 HRS: 20.5N 140.6E - 50 knots (CAT 2/Severe Tropical Storm)
44 HRS: 21.5N 140.5E - 60 knots (CAT 2/Severe Tropical Storm)
69 HRS: 23.2N 140.0E - 70 knots (CAT 3/Strong Typhoon)
There was ZERO chance of the Titanic sinking, too....according to those who knew the most about it! Until the storm is NORTH of Florida.....those people have every reason to be concerned. To not be at all, would be foolish.
Thats quite a bit far west compared to the last run, makes me wonder if the Euro is going to be even further-west given the trends....
If u didn't have the rich u wouldn't have the money in the first place.
Irene's core has been strange for most of her life anyway.
The current barrier in place would not have been tested by anything like the storm surge that Providence could receive on Sunday. A track right over the area or just to the W could pose a serious problem.
I agree, and Irene will be moving over the Gulf Stream too. Irene could easily intensify overnight into Thursday.
Lovely news Levi, lovely. :P
Btw, I lied, I'm staying up a lil longer.
I wouldn't call it strange. She has looked like a hurricane struggling with dry air entrainment, but with enough positive factors to keep intensifying. We may finally see a solid eyewall with her after this EWRC is complete, as outflow has expanded nicely to the west, really filling out the storm into a more symmetric shape, the best-looking of her life so far, though still not perfect.
very well spoken.
I've family in Crestview (Military that call it affectionately Crestucky where the toothbrush must have been invented or they would call it a teethbrush) and I love the Destin area.
stay safe.
"Hey, look lady... you want me to drive, or bail water?"
Sure.
live pier cam on island where i live on the NC coast
To America, like so many others
Little bit like how Katrina's central pressure only rose from 940 mb right before its EWRC to around 945 mb during the cycle itself. Larger storms tend to resist large pressure rises while undergoing these cycles.
Exactly. I've said that several times here today. I live on the FL east central coast just north of Melbourne. You can have as many models and projections as possible, but until Irene either makes turn more to the north than west or passes by to my north, I'm not taking my eyes off her....she will go where she goes...period. Stay safe everyone and special prayers for those in the Bahamas tonight! Goodnight all!
Someone in an earlier post(not SP) said their local met said if she didnt turn by 77w look out.
poor GA and NC
Let's not get racist.
Those are Wave Actions not Wind.........but, Surf waves..Irene has over 26ft waves near the center.......OUCH.
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