Looking ahead: Could Isaac remnants bring more rain to mid-Atlantic?

  • Tropical Storm Isaac is expected to strike Louisiana as a hurricane before moving across the Mississippi Valley.
Tropical Storm Isaac is expected to strike Louisiana as a hurricane… (National Hurricane Center )
August 28, 2012|By Scott Dance, The Baltimore Sun

Isaac reached hurricane strength Tuesday afternoon and is poised to strike the Louisiana coast by tonight or early Wednesday -- find more on the storm's latest developments here. In the meantime, what could the storm mean for Maryland?

It's too early to say. The storm's cone of probability calls for it to move through the Mississippi River valley late this week, and to turn eastward toward the Ohio Valley. That could mean rain for some parts of the country that desperately need it, but also flooding.

The National Hurricane Center calls for the storm to weaken to a post-tropical depression by Saturday, moving over Missouri, Illinois and Indiana.

Many of the key models meteorologists use have the storm passing well to our north, according to the Weather Underground.

If it does reach Maryland, it likely wouldn't be until late in the long weekend or early next week, WBAL meteorologist Tony Pann writes in a blog post. A high-pressure system could potentially cause the system to stall, dumping more rain on the southeast, Pann writes.

Once Isaac moves past the Louisiana coast, 4-6 inches of rain are forecast over its track across the Mississippi Valley, according to the Hydrometeorological Prediction Center. Maryland isn't included yet in that forecast, which covers the next five days, but stay tuned.

Have a weather question? E-mail me at sdance@baltsun.com or tweet to @MdWeather.

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