Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 457 AM EDT Thu Oct 08 2015 Valid 12Z Thu Oct 08 2015 - 12Z Sat Oct 10 2015 ...Severe thunderstorms and flash flooding possible for portions of southeast New Mexico and western Texas through Friday morning... ...Fast-moving low pressure system to bring rain and thunderstorms from the Upper Midwest to the East Coast... ...Heavy rain and flash flooding possible for portions of Washington and South Carolina... Numerous showers and thunderstorms will continue today across portions of the Southwest, Southern Rockies and Southern Plains as warm, moist air feeds into the area within the upper-level low's circulation. Amounts up to 2 inches will be in that region- with 2 to 3.5 inches forecast for portions of the Texas Hill Country and the Sierra Madre Oriental region of Mexico. Flash flooding will be possible across this area through this evening. Thunderstorms should become more scattered in nature by Friday as available moisture and instability lessens. A low pressure system will surge through the Upper Midwest and Upper Great Lakes today, reaching the Lower Great Lakes and New England late tonight/ Friday morning. Scattered to numerous showers and thunderstorms are expected along and head of this fast moving system. Rainfall amounts will be on the lighter sides across the plains and Midwest- generally less than 0.50 inch. Areas east of the Mississippi will have higher precipitation totals over the next threes days. A swath from Northeast Wisconsin to Maine is forecast to receive 1 to 2 inches. Additionally, central/southern Appalachians and South Carolina could see up to 1.25 inches. This will aggravate the already very water-logged South Carolina. Any rainfall will likely lead to flash flooding. Hurricane Oho, currently located between the Hawaiian Islands and Mexico in the central Pacific Ocean, is expected transition to an extra-tropical cyclone as it tracks rapidly to the northeast over the next few days. The latest forecast from the Central Pacific Hurricane Center shows the core of the low pressure system heading toward southeast Alaska/British Columbia by Friday afternoon. This system will allow moisture to stream into the Pacific Northwest ahead of the associated warm front. As a result, numerous showers are expected across coastal portions of Washington and Oregon beginning on Friday. The Olympic and Cascade ranges in Washington could see amounts up to 5 inches. Rapid runoff from the Cascades to lower elevations will raise the risk for flash flooding. Campbell Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_wbg.php