Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 333 PM EDT Wed May 01 2019 Valid 00Z Thu May 02 2019 - 00Z Sat May 04 2019 ...Heavy to excessive rainfall and severe weather possible into Friday along a nearly stationary frontal boundary from the Southern Plains to the Midwest... ...Locally heavy rainfall possible across Florida on Thursday... Unsettled and active weather is expected to continue through most of the short range from the Southern Plains to the Midwest/Ohio Valley along a nearly stationary frontal boundary. Multiple waves of low pressure are expected to form along this boundary which will likely provide a focus for enhanced rainfall. Widespread showers and thunderstorms will persist along much of the boundary with the best chance for significant rainfall (on the order of 1 to 3+ inches) from central/east Texas to southern Ohio. There is an increased theat for flash flooding and severe weather from central Texas to the Arklatex region into Friday where WPC shows a slight to moderate risk for excessive rainfall and SPC has a slight to enhanced risk for severe thunderstorms. A secondary region of heavy rainfall/flash flooding and severe weather exists across parts of the Ohio Valley on Thursday as well. By Friday the boundary should slowly begin dropping southward, but heavy rainfall will continue to be a threat across parts of central and east Texas. The eastern part of the this boundary drifts slowly through the Mid-Atlantic/Northeast which will also spread showers and storms, containing isolated heavy rainfall and severe weather, into that region as well. Elsewhere across the country, a weak surface low developing across the Florida peninsula on Thursday will bring an increased chance for heavy to locally excessive rainfall. Ahead of the dominant frontal boundary, expect temperatures to be warm and above normal with afternoon highs 10 to 20 degrees above average forecast from the Southeast to the Mid-Atlantic Thursday and Friday. Behind the front, from the Central Plains westward, temperatures should be below normal on Thursday, with the West coast beginning to warm to above average as upper level ridging builds into the region. Santorelli Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php