090 FXUS01 KWBC 090750 PMDSPD Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 350 AM EDT Fri Oct 09 2026 Valid 12Z Fri Oct 09 2026 - 12Z Sun Oct 11 2026 ...Hurricane Isaias will begin to impact the eastern Gulf coast Friday, spreading northeastward Saturday into the TN Valley/Southern Appalachians and Southeast... ...Moisture from Tropical Storm Rachel may bring heavy rains and flooding potential to Southern California, the Southwest and Great Basin late Saturday into Sunday... ...The recent heatwave over much of California coming to an end as a major pattern change occurs over much of the West... ...Winter weather possible Saturday across the Northern Rockies... Hurricane Isaias,currently over the central Gulf. will continue to push steadily northeastward Friday, with major life-threatening impacts spreading inland Friday and continuing Saturday. The highest winds and greatest storm surge will be focused across the Florida Panhandle into far southern Alabama, while the heavy rain threats will spread across a large region from the eastern Gulf Coastal region on Friday, north and northeastward through the mid-South, into the Tennessee Valley, Southern Appalachians and Southeast on Saturday. While tidal flooding will be confined to the immediate Gulf coast, inland flash, urban and river flooding are possible Friday and Saturday, especially across the Florida Panhandle, northward into southern Alabama, far southwest Georgia and across the Southern Appalachians from far western North Carolina and the Upstate of South Carolina. Rains from the extra-tropical remnants of Isaias will push farther northeastward late Saturday into Sunday through the Ohio Valley, Central Appalachians and into the Mid-Atlantic. Rainfall totals will likely be less across these areas than for areas farther to the south on Friday and Saturday given the overall weakening trend to the storm at this time. Active heavy rains and flash flooding potential also possible late Saturday into Sunday from moisture associated with Tropical Storm Rachel. This storm is forecast to push northeastward Friday and Saturday from the northeast Pacific and toward the northern Baja of California. While there are uncertainties in the strength of this system as it moves northeastward, there is high confidence that much above average moisture values with Rachel will move across Southern California, the Southwest and Great Basin Saturday and Sunday. This will support potential for widespread moderate to heavy rainfall beginning Saturday and continuing into Sunday across these regions. This heavy rains may lead to flash flooding, especially in geographically sensitive regions of Southern California into the Southwest and Southern Great Basin. The overall large scale pattern that is allowing for the tropical moisture to be drawn northeastward into Southern California, the Southwest and Great Basin will also be bringing an end to the recent heatwave that has gripped large portions of the West with much above average temperatures and record heat. One more day of much above average high temperatures and record high potential is likely Friday across much of the West, followed by much cooler temperatures spreading southeastward from the coastal Pacific Northwest on Friday, into the Northwest and Northern California on Saturday, and across the Northern Rockies, Great Basin, into the Southwest and California on Sunday. The coldest temperatures across the West expected Saturday across the Northern Rockies and in the lee of the Northern Rockies across northwestern Montana. This may lead to early season heavy snows for the Northern Rockies of Montana. In addition to the much above average temperatures across large portions of the West on Friday, the dry conditions and warm temperatures will support an elevated to critical fire weather threat across portions of the Great Basin into the Northern Rockies and lee of the Northern Rockies across the Northern High Plains. Red Flag warnings are currently in effect across much of these areas. Oravec Graphics available at https://www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php $$