Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 359 AM EDT Fri Sep 08 2017 Valid 12Z Fri Sep 08 2017 - 12Z Sun Sep 10 2017 ...Hurricane Irma will begin impacting Florida this weekend... ...Very heavy rain possible for the southern tip of Florida... ...Heavy rain possible over the Northeast Coast of Florida... An old front draped over Southern Florida will slowly move northward to the northern parts of the Florida peninsula by Saturday evening. Tropical moisture will interact with the boundary to produce showers and thunderstorms over parts of the Florida peninsula through Saturday morning. Showers and thunderstorms associated with Hurricane Irma will begin to impact Southern Florida overnight Friday and continue Saturday night into Sunday. For the latest information on Irma, please refer to the National Hurricane Center (www.nhc.noaa.gov). Meanwhile, a deep upper-level trough over the Northeast/Great Lakes will aid in producing rain with embedded thunderstorms over parts of the Great Lakes into the Northeast on Friday. As the trough moves eastward, rain with embedded thunderstorms will be over parts of the Northeast on Saturday. Ziegenfelder Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php