Tuesday, 11 a.m.
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NHC kept Isaac classified as a tropical storm, rather than calling it a hurricane, at 11 a.m. EDT. Either way, there are major impacts along the Gulf coast.
A cold front moving off the Northeast coast is followed by drier air that should now remain in control region-wide for the rest of the month. (Of course, the month only runs through Friday). This video shows the setup and how things should progress for the rest of the week. I wanted to make a special note about how hot the air mass is that's moving east from the northern Plains. Based on upper air temperatures, I would think it could be 90 to 100 degrees later this week from Minneapolis to Chicago. Numerical models have not gone that high so far. At least some of the heat will extend all the way to the Middle Atlantic coast and southern New England for Friday and Saturday.
Last week, at the American Meteorological Society Broadcast Conference, I gave a short talk entitled, Tropical Rainstorms, not Remnants. The idea is that even when one of these storms no longer is classifiable as a tropical storm based on wind, its rain poses a serious threat to life and property. Tropical Rainstorm Lee stands out as a prime example from last year. The term remnant does not do it justice. Here is the summary slide from that talk:
More than 110,000 lightning strikes occurred in the northeast third of the nation in the 24 hours ending at 11 a.m. EDT today (June 13).
This map shows the low pressure at the western edge. The isobars help define the location of the frontal boundary between the hot and cool air masses.
This map shows the area that could have damaging thunderstorms tomorrow and tomorrow night.
The Northeast regional radar at 10 AM showed a large area affected by showers and thunderstorms:
Whereas Andrea was centered in eastern South Carolina at 8 a.m., this satellite water vapor image shows the greatest concentration of moisture is well northeast of the surface circulation center
Quite a few models are in use, and this map shows there is widespread agreement on where the center of this storm is going.
Elliot Abrams
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