Morning, Washington. After last weekend brought us some glorious weather, the expert weather prognosticators have busted out the 100% chance of rain prediction, beginning sometime this afternoon. If you’re got any chores or plans which involve being outside, we’d recommend you either finish them this morning or plan on packing your sturdiest umbrella. And don’t forget, if you’re outside and see a large contingent of emergency vehicles — don’t fret! We’re getting updates that in addition to a large exercise on 19th Street, other National Preparedness Month trainings are occurring at 12th and F Streets, NW and 4th and D Streets, SW. Expect to hear intermittent sirens in those areas until 3 or 4 p.m.

Scanning the headlines this morning:

>> The District broke news that they would pull 170 special needs students from Accotink Academy — a school in Springfield, Virginia to which the District had been paying $10 million per year for the education of children with attention deficit disorder and other challenges — by giving kids a letter with the news as they boarded buses to go home. Parents: none too pleased.

>> Due to a dispute with the Ellington family, the District’s Duke Ellington Jazz Festival will now be known as the D.C. Jazz Festival. Meanwhile, 99% of the population will probably keep referring to it as “the jazz festival.”

>> Just in case your felt the need to get worked up about religion this morning, the Post has a report from yesterday’s Muslim unity and prayer gathering at the Capitol. The key exchange: ‘ “I would suggest you convert to Christ!” Benham shouted over a megaphone. Islam “forces its dogma down your throat.” ‘