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July 26, 2011

Another Friday with 100-degree weather ahead

The temperature is not likely to soar to 108 degrees like it did last Friday, but forecasters are predicting another hot-and-humid Friday ahead with highs reaching 100 degrees in Baltimore. The airport forecast calls for a high of 99 degrees.

For the moment, we're enjoying northerly breezes and low dew points. And while temperatures are expected to pop back into the low 90s today, that's only a few degrees above the 87-degree norm for this time of year at BWI. And the low humidity will keep it relatively comfortable in Central Maryland.

Overnight lows will drop to the upper 60s or low 70s tonight. Wednesday will bring more of the same, with slightly lower afternoon highs.

But all good things must come to an end. In this case, it means the high that took over after a cold front passed through with some showers Monday, will be moving east AccuWeather.comand off the coast by Thursday. That will bring us into the return flow on the backside of the high. And in a repeat of last week's weather, those southerly winds will bring in increasing heat and humidity, while subsidence of the air in the high pressure will heat us up even more.

Forecast highs for the airport jump from 94 degrees on Thursday to 99 on Friday, and to 100 degrees on Friday downtown.

If that sounds faintly comforting given last Friday's unprecedented heat, consider this: At this time last week, the NWS was forecasting a Friday high of 100 at BWI. The actual temperature reached 106 degrees.

So far this summer (through Monday), we have recorded four days of 100 degrees or more at BWI-Marshall Airport, and 28 days of 90-plus weather. The average annual number of 90-plus days at BWI is 29, so by Wednesday we will have tied the annual average.

The 7-day forecast calls for seven more 90-plus days through next Monday, bringing the total to 35 days. Today should be the 12th-straight day at 90 and above, with seven more to come, if forecasters are right.

Anyone for lowering the "heat ceiling?"

Posted by Frank Roylance at 10:23 AM | | Comments (0)
Categories: Forecasts

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About Frank Roylance
This site is the Maryland Weather archive. The current Maryland Weather blog can be found here.
Frank Roylance is a reporter for The Baltimore Sun. He came to Baltimore from New Bedford, Mass. in 1980 to join the old Evening Sun. He moved to the morning Sun when the papers merged in 1992, and has spent most of his time since covering science, including astronomy and the weather. One of The Baltimore Sun's first online Web logs, the Weather Blog debuted in October 2004. In June 2006 Frank also began writing comments on local weather and stargazing for The Baltimore Sun's print Weather Page. Frank also answers readers’ weather queries for the newspaper and the blog. Frank Roylance retired in October 2011. Maryland Weather is now being updated by members of The Baltimore Sun staff

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