Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 409 PM EDT Thu Sep 04 2014 Valid 00Z Fri Sep 05 2014 - 00Z Sun Sep 07 2014 ...A cold front progressing eastward through the Central U.S. will bring a touch of Autumn in its wake... ...A wet period in store for the Southern High Plains... Over the course of the next couple of days, the northern stream of the jet will gradually gain amplitude. This ultimately will help drag a well defined cold front toward the east carrying a risk of showers and thunderstorms in its vicinity. Some of the heavier precipitation should be across the Great Lakes region which will be in closer proximity to the stronger jet dynamics. Upon the passage of the front, expect temperatures to cool bringing more an autumnal feel to the air. Currently this frontal boundary consists of temperatures in the upper 80s to lower 90s in the warm sector with upper 60s to near 70 in its wake. It will take a couple of days for this frontal zone to work its way toward the East Coast with the boundary eventually reaching the I-95 corridor by Saturday afternoon/evening. Moisture should definitely be on the rise across the Desert Southwest eastward into the Southern High Plains. A fairly organized area of convection is forecast to develop across southern to eastern New Mexico with areal averages of 1 to 2 inches expected through Saturday evening. This region has also been highlighted in the WPC excessive rainfall forecast which suggests areas of potential flash flooding. The pattern remains conducive for heavy rainfall as the moisture from Hurricane Norbert lifts northward from the Tropical Eastern Pacific. Elsewhere, a disturbance should linger right along the southeastern U.S. coast which will promote an active period for shower and thunderstorm development. The more enhanced area of precipitation may occur along the local sea breezes particularly along the Georgia and South Carolina coastlines. Out to the northwestern sector of the country, expect tranquil conditions to prevail as an upper ridge holds strong over the region. Highs should reach the 80s each day with slightly higher readings in the valley locales. Rubin-Oster Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_wbg.php