Heavy rain Friday; more showers through Tues.
We just can't seem to shake these clouds and persistent chances for rain. And rains could become heavy Friday and Friday night, with several inches possible before it's over. And showers remain in bthe forecast right through the weekend. The word "sunny" doesn't return to the forecast without 
an accompanying threat of showers until Wednesday.
The problem remains a stubborn low over the Ohio Valley that just doesn't want to move, and an associated cold front to our west. They're combining to draw warm, moist air north from the Gulf and the Atlantic. We get clouds and showers - isolated, scattered, all varieties - and the occasional thunderstorm.
The wettest day will be Friday, with several inches on tap for the I-95 corridor if the forecasters are right. Rain chances at put at 90 percent during the day, and 80 percent Friday night. Forecast models differ on how much to expect. But forecasters today decided to issue a Flash Flood Watch for Friday from Carroll and Harford counties south to Prince George's and Arundel.
By the weekend, the cold front will have stalled on the coast. Central Maryland will remain in the plume of moist air from the south, and shower risks remain in the 30 to 60 percent range under cloudy skies. "Partly sunny" appears in Sunday's forecast, and again on Tuesday, both with a chance for showers.
Had enough yet?
Comments
Frank --
Is it just me, or has it not only been a really wet September, it's been a really humid month too?
It feels like even when it's been sunny, it's been really muggy. It seems like there is mildew growing on the mold growing on the mushrooms sprouting in my basement -- I swear that the Sun was wilting this morning and covered with a thin layer of dew, despite being delivered to a dry porch.
Any sense whether this pattern will continue well into the fall, or will we finally see clear, crisp weather in October?
FR REPLIES: We have had a pretty persistent, or repeating pattern of winds out of the south or southeast, bringing lots of wet air out of the Gulf and the Atlantic. Not much guidance from the long-range forecast. No strong indication either way on precipitation or temperatures for October through December..
Posted by: ThaiChicken | September 22, 2011 7:49 PM
As another poster stated this has been a horrible warm, and humid September. Overall was this summer hotter than summer 2010? Was this one of the warmest Septembers? I've only been able to sleep without the A/C maybe 2 or 3 nights this whole month. Seems like there won't be much of a break on the BGE bill. I wish you all had more insight on how October and the fall will be weatherwise.
Also how many 90 degree and over days did we have so far in 2011?
FR REPLIES: The summer of 2011 was the eighth-warmest since 1871, when official record-keeping began. (Summer 2010 was the hottest.) BWI has recorded 40 days with temperatures of 90 degrees or more, so far. (We'll close the Hot-in-Baltimore Contest on Oct. 15, just to be sure.) September has not been especially warm, just very wet and gray. It's the tropical humidity you're fighting with your AC, not the heat. The Climate Prediction Center shows no strong indications either way on this fall's weather: http://1.usa.gov/wZWkk
Posted by: Simon | September 24, 2011 10:41 PM
To me, Summer 2010 seemed hotter; however it seemed we had more extreme hot days this go around. As others have said this September has sucked. The tropical jungle humidity makes it feel hot. It seems September in Baltimore can seem or actually be hotter than August and feel more like July. This has to be one of the longest string of tropically humid grey days caused by one lingering storm system. How come it seems as if warm and humid weather events last longer than the cold ones? Is it the mountains that cause our valley of heat and humidity? Is the Bermuda high and La Nina contributing to this loitering lousy Septmember weather?
Posted by: zippyjet | September 27, 2011 9:27 PM