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September 27, 2010

Summer's missing rain? It's on the way

The sound of rain we've been missing for most of the summer, the water absent from the creeks, the gutter-washing torrents we've not had for so long? It's all on the way this evening. Time to watch the summer's trash come down the Jones Falls.

The National Weather Service has issued a Flash Flood Watch for most of Maryland, from Frederick to St. Mary's county.  It reads, in part:

NOAA/NWS"A POTENT AREA OF LOW PRESSURE WILL BRING RAINFALL TO CENTRAL
  VIRGINIA AS WELL AS THE POTOMAC HIGHLANDS OF WEST VIRGINIA AND
  VIRGINIA THROUGH TONIGHT INTO TUESDAY MORNING. RAINFALL AMOUNTS
  BETWEEN 2 AND 4 INCHES ARE EXPECTED ACROSS MOST LOCATIONS WITH
  ISOLATED AMOUNTS UP TO 5 INCHES IN BANDS OF HEAVIER RAIN AND
  THUNDERSTORMS.

" FLASH FLOOD GUIDANCE REMAINS HIGH DUE TO THE RECENT DRY
  WEATHER. HOWEVER...MOST OF THE RAIN IS EXPECTED TONIGHT INTO
  TUESDAY MORNING AHEAD OF A COLD FRONT. THEREFORE...HIGH AMOUNTS
  OF RAIN IN A SHORT PERIOD OF TIME MAY CAUSE SMALL STREAMS AND
  CREEKS TO QUICKLY RISE OUT OF THEIR BANKS"

That doesn't sound like it includes Maryland, but it does. The rain may be light at first, but forecasters do expect periods of heavy rain overnight and early Tuesday. A half- to three-quarters of an inch is possible at BWI.

UPDATE, 6:45 p.m.: The rain forecast for BWI now put the possible totals at 1 to 2 inches.

There's also a Coastal Flood Advisory and a Coastal Flood Watch up for the Western Shore of Maryland. The approaching low is already raising water levels, and easterly winds drive more water ashore at the times of high tide.

UPDATE 6:40 p.m.: Harford, Baltimore and Anne Arundel Counties and Baltimore City are now under a Coastal Flood Warning. Here's the real-time tide chart for the city.

"THE WATER LEVEL AT BALTIMORE WILL REACH 3.5 TO 4 FEET...REFERENCED
TO MEAN LOWER LOW WATER. ANNAPOLIS WILL REACH 3.5 FEET MLLW. IN
BOTH LOCATIONS...THIS IS AROUND CRITICAL LEVELS FOR MINOR FLOODING."

And that won't be the end of it. Another storm, a tropical system expected to move up the coast at mid-week, could bring us another round of heavy rain Wednesday into Thursday. Here's the Hazardous Weather Outlook with details.

Posted by Frank Roylance at 6:01 PM | | Comments (2)
Categories: Forecasts
        

Comments

the rains came---2 inches in western frederick county, it sure sounded nice on the roof last night and early this morning :) too late for my friends in farming, they got devastated this year--very grim situation

I doubt the rains will sound "nice" tonight and tomorrow - the farmers can cry with the people tomorrow bailing out basements, losing power, worrying about teen drivers out in the monsoon, stuck in hours of traffic dodging flooded roads, and unfortunately those having fender benders which this "stuff" brings......relax.....the weather is never "normal" and at the end of every year the precip deficit is always erased and evens out. Smiles.

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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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