With a moist flow off the Atlantic, low stratus has settled in over the I-95 corridor from just north of Baltimore up into New England. A stationary front currently sits along the N.Y./Pa. line then southeast through eastern Pa. and southern N.J. With a ridge of high pressure anchored to the north, the eastern portion of this front will move very slowly northward during the day.
The temperature reached 90 degrees Saturday at BWI. The last time the temperature reached 90 or above in October at BWI was Oct. 9, 2007. Highs could be flirting with 90 degrees again Sunday. South to southeasterly flow will become stronger late Sunday night into the day on Monday in response to the approaching cold front from the west. It will be a breezy, warm and humid day prior to the rain arriving.