Short-range models catching on to the faster timing of Isaias, which made landfall a few hours earlier than previous runs suggested in the last couple of days. For DC, the faster timing means... 1) Some rain starts Saturday evening, from south-to-north. Rain may start between 7-10pm in DC proper. 2) Heaviest of the rains are overnight through Sunday morning. 1-3" of rain possible, higher amounts locally. 3) Breaks in the action Sunday afternoon. Would help the Commanders/Giants game in terms of it not being a deluge, but unlikely to be totally dry. 4) Some thunderstorms then possible Sunday afternoon & evening. Isolated tornadoes would be possible in the storms due to the extra low-level spin associated with the storm. 5) While not expected to lead to widespread damage, Sunday is still a breezy day...with winds gusting 30-40mph as the storm passes by. 6) Showers linger into Monday, before low exits to our northeast. Sun then returns into Monday afternoon.

Sunday still the wet day here in the DC region as the remnants of hurricane Isaias will come our way. Heavy rain is expected, especially during the front half of the day. 1-2", locally higher amounts are very possible as the storm moves through. Latest is showing some breaks in the rain shield in the afternoon and evening, however, because the central low is drifting to the northeast, it then puts the DC region into the southeast quadrant of the low where you can get some severe thunderstorms, and the risk for isolated tornadoes because of it. SPC added us to a marginal risk today because of this threat.

UPDATE: Well that was quick! Just 30 minutes after their 11pm advisory, NHC released an 11:30pm update upgrading Isaias to hurricane status! Isaias is the latest forming first Atlantic hurricane in the satellite era (since 1966). It's expected to continue to strengthen Thursday.

For the DC area...plenty of sunshine in the days ahead...but then just about all the guidance out there suggests that the tropical remnants will bring us our third rainy Sunday in a row. As this involves tropical moisture...we could be talking about quite the heavy rainfall too.

Summer feel coming up across the DC region on Thursday & Friday as some areas could push towards 90°F...enjoy the warmth, as fall returns with a vengeance next week. Western parts of our region may see their first upper 30s of the year for overnight lows by the midweek!

HRRR shows similar tracking to the GRAF run with that turn into the Jersey Coastline on Sunday. Certainly gets rain into DC for Sunday afternoon. First Commanders game at home could be a wet one

Rain showers continue overnight right through the front half of your Wednesday morning...but then drier air should start to win out. We'll still deal with clouds, breezy & cool conditions over the next couple of days...but should not be nearly as wet with even some peeks of sun!