Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 355 AM EDT Tue Jul 24 2018 Valid 12Z Tue Jul 24 2018 - 12Z Thu Jul 26 2018 ...Moderate risk of flash flooding possible across the Mid-Atlantic and Northeast through Wednesday... ...Dangerous heat to continue across the Southwest and portions of the West Coast... ...Risk of heavy rainfall leading to flash flooding for the central/southern Rockies and central High Plains... The Mid-Atlantic and Northeast will continue to be in the wet pattern as an upper low transports tropical moisture across these regions. Multiple rounds of showers and thunderstorms will continue to stream across the Carolinas and into the Northeast--with some of these storms producing heavy rain. As soils are already saturated, any more rainfall will exacerbate these conditions. For today, a moderate risk of flash flooding will stretch from coastal North Carolina northward into southwest New York. On Wednesday, the moderate risk will shift into the Northeast and portions of New England. Although rain is still expected for the Mid-Atlantic and coastal North Carolina, the axis of heavy rainfall is expected to be farther north. These areas are still under a slight risk of flash flooding. By Thursday, a cold front will sweep across the East Coast--and with it, sweeping the precipitation out of these areas. The dangerous heat that has plagued the southern Plains has finally ended as high temperatures have dipped below the century mark. However, the Desert Southwest, portions of California and the Pacific Northwest continue to experience this stifling heat wave that will extend into the late week. Excessive heat warnings and heat advisories have been issued across these areas. Places like Phoenix, AZ will see high temperatures near 117 today and 115 on Wednesday. The Pacific Northwest will also see temperatures in the mid to upper 90s and even 100 in some places. With these dry and hot conditions, elevated fire weather--with critical fire weather conditions for a small portion near Los Angeles, CA--will be possible across portions of the West Coast. Deep moisture will be brought up from the western Gulf of Mexico which will help fuel afternoon/evening thunderstorms across the central/southern Rockies and central High Plains. There is a marginal risk of flash flooding particularly in favorable terrain today--with a slight risk of flash flooding possible for this area and into the central High Plains. In addition, the Sierra Nevada mountains can also expect diurnally driven thunderstorms--where a marginal risk of flash flooding is possible through Wednesday. Reinhart Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php