Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 331 PM EDT Wed Oct 07 2015 Valid 00Z Thu Oct 08 2015 - 00Z Sat Oct 10 2015 ...Severe thunderstorms and flash flooding possible for portions of southern New Mexico and western Texas... ...Fast-moving low pressure system to bring rain and thunderstorms from the Upper Midwest to the East Coast... An upper-level low spinning across the southwestern U.S. will drift southward into Mexico tonight. East of this low, moisture will feed northwestward from the Gulf of Mexico across Texas and into New Mexico. This combined with a surface trough will lead to the development of numerous showers and thunderstorms across southeastern New Mexico and western Texas tonight, which will move southeastward across West Texas through Thursday/Thursday night. The Storm Prediction Center has outlined a slight risk of severe thunderstorms through tonight across portions of this area -- please refer to the Convective Outlooks from SPC for further details on the severe weather threat. In addition, flash flooding is possible across this area as well tonight and continuing into Thursday/Thursday night. Thunderstorms should become more scattered in nature by Friday as moisture and instability become somewhat less. A low pressure system will move quickly across the Upper Midwest and Upper Great Lakes tonight through Thursday, and then into the Lower Great Lakes and the Northeast Thursday night into Friday. Scattered to numerous showers and thunderstorms are expected in association with this system across the Upper Midwest tonight, from the Great Lakes into the central plains on Thursday, and from the Ohio valley to the Mid-Atlantic and Northeast on Friday. Hurricane Oho in the central Pacific will accelerate rapidly northeastward over the next couple days as it transitions to an extratropical cyclone. While the core of this low pressure system is forecast to move into British Columbia on Friday -- moisture will 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. Ryan Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_wbg.php