Archive for August, 2012

The Tropics Are Busy
August 29, 2012

The early Wednesday afternoon full disk satellite image shows 3 tropical cyclones over the Atlantic/Gulf/eastern Pacific along with 2 tropical waves and a new disturbance coming off the west African coast.

The early late afternoon report on Isaac  indicates that winds are barely hurricane tropical storm strength at 75 70 mph. The storm is moving slowly though and is a significant rain producer so it remains a major problem for the north coastal areas of the Gulf of Mexico. For the latest check out www.wbaltv.com/weather.

John Collins

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Isaac Still Near Louisiana Coast
August 29, 2012

 

Hurricane Isaac was virtually stalled overnight along the Louisiana coast and has been edging ever so slowly to the west-northwest Wednesday morning with marginal but destructive hurricane force winds.

 

The 10:30am(EDT) radar shows that the eye of the storm is now completely on shore but over marshy areas that continue to supply some degree of additional moisture to the system. It is evident though that much of the storm is still out over the Gulf waters.

 

The image above is the radar estimate of rainfall for the storm. A large area of 6-8 inches has been estimated with some places within that area approaching 10 inches.

With the storm essentially stalled overnight, persistent winds coming off the Gulf, high water from storm surge has caused flooding across low lying areas.

 

The forecast track continues to take the storm toward the Great Lakes and then turning eastward toward the east coast. This would point to a chance for rain across the Mid Atlantic region for a portion of the Labor Day weekend.

 

The GFS computer model places Isaac’s remnant “eye” just south of Lake Michigan early Monday with clouds and some rain approaching the Chesapeake Bay.

Check out the WBAL-TV Instaweather forecast at www.wbaltv.com/weather.

John Collins

Isaac Makes Landfall
August 29, 2012

Hurricane Isaac has made landfall near the mouth of the Mississippi River Tuesday evening with winds reported up to 80 mph. Gusts are expected to be stronger through the evening and overnight hours.

 

 

 

 

With the storm center still near costal Louisiana, the heaviest rain bands were rotating close to New Orleans but mostly to the south of the city. Localized rain totals to near 15 inches are possible.

 

Isaac is forecast to move northwest and then north toward the Great Lakes by the weekend. For parts of the Midwest the rain will be a double edged sword. Some flooding is possible but the rain will help offset the effects of this summer’s drought.

 

Remnants of the storm may generate some rainfall over the Mid Atlantic region by the end of the weekend or early next week. Check out the WBAL-TV Instaweather forecast at www.wbaltv.com/weather.

John Collins