Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 414 PM EDT Thu May 02 2019 Valid 00Z Fri May 03 2019 - 00Z Sun May 05 2019 ...Showers and thunderstorms from Texas into the Ohio Valley and Northeast into the first half of the weekend, some of which will be capable of flash flooding... ...Greatest threat for severe thunderstorms across portions of Texas through Friday... A slow moving frontal boundary in place from the Ohio Valley into Texas will be responsible for active weather given warm and humid conditions within the warm sector. High temperatures will be well into the 70s and 80s from the Ohio Valley to the Gulf Coast through Friday which will provide one of the ingredients needed for thunderstorms and heavy rain. Several waves of low pressure will develop and track along the front over the next 24 to 48 hours, with a gradual eastward movement of the boundary expected through Saturday morning. Sufficient moisture and help from stronger winds aloft will also aid in the production of thunderstorms, some of which may be severe. The Storm Prediction Center has a Slight Risk of severe thunderstorms this evening from portions of south-central Texas to west-central Texas as well as for portions of the Ohio Valley. The potential will also exist for flash flooding from these thunderstorms. The focus for severe storms and flash flooding will remain over Texas on Friday with a lower, but a threat still worth noting, into portions of the central Appalachians. Behind the front, temperatures will be cooler than average from the Great Lakes to Oklahoma and northern Texas but some showers and thunderstorms are in the forecast in the post frontal environment from Kansas into Oklahoma tonight and Friday. While portions of Texas and Oklahoma will dry out during the day on Saturday, high plains thunderstorms are possible Saturday evening from the Texas Panhandle into eastern Colorado and western Kansas. Some of these will have the potential to be strong to severe. The western U.S. will see temperatures near to slightly above average through Saturday but will otherwise have quiet weather. The only other system of note will come down from Canada into the north-central U.S. Friday night into Saturday with a sharp cold front and a return to below average temperatures from eastern Montana to North Dakota where highs will only be in the upper 40s to low 50s. Light rain will also accompany this system with a few wet snowflakes not out of the question from Montana into North Dakota Saturday morning. Otto Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php