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July 22, 2011

Hot start to a record-breaking day

Here's the rundown on temperatures and Heat Indices for the region at 10 a.m.:

BWI:  Temperature 96 degrees + dew point 76 degrees = Heat Index 109 degrees

Md. Science Center:  Temperature 97 + dew point 76 = Heat Index 111 degrees.

The Sun:  Temperature 97 degrees + dew point (not real reliable) 84 degrees = Heat Index 132 degrees.

PJM InterconnectionI don't think there's much doubt that BWI will be setting a new daily heat record for Baltimore today. The hottest July 22 on the books for Baltimore reached 101 degrees, in 1957. We're just 5 degrees short of that mark at 10 a.m. and there's no rain in sight today. So I'd bet we will knock that record down this afternoon.

The official forecast high for today is 105 degrees downtown, and 103 at the airport

Speaking of records, the PJM Interconnection - the regional power grid that includes Maryland and parts of 12 other states plus the District of Columbia - reported this morning that the region set a new record Thursday for power consumption. We soaked up 158,450 megawatts of electricity. One megawatt is enough to power about 1,000 homes.

The previous record was set Aug. 2, 2006. After some adjustments for changes in the grid since then, PJM estimates the 2006 peak would have been 158,258 megawatts.

The demand for power to keep things cool across the region was met "without problems," the agency said. "Our efforts in fine-tuning how we forecast electricity demand and plan transmission improvements are paying big dividends for our system operations," said Michael Kormos, senior VP for operations.

(PHOTOT: Vicki Valerio, Philadelphia Inquirer, 2003)

Posted by Frank Roylance at 10:17 AM | | Comments (2)
Categories: By the numbers, Forecasts


Frank, could you possibly check around and see if you have any of that "wintery mix" left over from this past winter?

FR: Drank the last of it last night. Sorry.

"FR: Drank the last of it last night. Sorry."

And you didn't offer to share it?

Inconsiderate oaf!


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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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