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August 25, 2010

August likely to expire without more rain

After the heavy rains on the 12th, August was already well ahead of the long-term averages for rainfall in Baltimore. The airport has recorded 4.74 inches so far this month, nearly two inches Sailing Columbiamore than the average.

But the forecast from here looks dry. The folks in Sterling show the clouds we see today clearing away by tomorrow and Friday, with relatively cool, dry air moving in from the Great Lakes, as it often does here in late August.

And that means no rain anywhere in the 7-day forecast. We're looking at clear skies, sunshine and starry nights right through Tuesday, with temperatures slowly climbing back into the seasonable 80s, and by Sunday back toward the downright hot 90-degree range.

Looks like a fine weekend for the beach, or just about any outdoor activity you may be planning before the kiddies (most of them) go back to school on Monday.

Radiational cooling at night will drop temperatures into the 50s across much of the region Thursday and Friday nights. Open the sash and have a blanket handy.

Clear and dry may be fine for Central Maryland, which has seen plenty of rain in recent weeks. But Western Maryland, Southern Maryland and the Lower Eastern Shore remain very dry. Another week of sunny skies will only add to their problems.

(SUN PHOTO: Amy Davis, 2007)

Posted by Frank Roylance at 11:08 AM | | Comments (2)
Categories: Forecasts


Frank, I'm just curious, would you be able to tell me what the maximum swing between high and low temperature is for the b'more area? I noticed the forecast is calling for swings from the 60s to 90s which seems like a lot but I also remember some crazy swings back in March/April. You may have already answered this when you responded to a question about our warmest low temperature but I can't remember. Thanks!!

FR: The record "spread" between the high and the low in one calendar day for Baltimore is 48 degrees, set on April 1, 1948. (Not an April Fool's joke!) The low was 40 degrees, the high was 88. (The smallest spread on record is zero. On March 24, 1884, the high and low were the same: 52 degrees.)

Tropical storm Earl may be an east coast threat. While way to early, the sub tropcial ridge will strengthen once Danielle is swept NE and this could push Earl further westward and within 7 days from now it would be around 70 west and 25 north which is getting towards a GA/SC strike zone. Sheer will also diminish so this guy bears watching. Gosh we don't want any damaging hurricane but we desparately need the rain here in Western MD. If it weakened after landfall and moved north it would dump a hefty amount of rain in western MD assuming a funnel boundary was in place and not a cold front.

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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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