Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 351 PM EDT Wed Jul 10 2024 Valid 00Z Thu Jul 11 2024 - 00Z Sat Jul 13 2024 ...Post-Tropical Cyclone Beryl to bring severe thunderstorms, heavy rain and flooding to parts of the Northeast, northern Mid-Atlantic, and New England tonight... ...Scattered flash flooding possible across the eastern Mid-Atlantic Friday... ...Dangerous heat and record high temperatures to continue for much of the West through the end of the work week... Beryl continues to make its trek through the Lower Great Lakes and toward the Northeast this afternoon as a Post-Tropical Cyclone. Thunderstorms forming both ahead of an approaching cold front nearing the Mid-Atlantic and along/north of a warm front stretching from northern New York State to New England will be capable of containing intense rainfall rates, which is likely to produce numerous areas of flash flooding. A Moderate Risk (level 3/4) of Excessive Rainfall remains in effect from northern New York to northern Vermont and New Hampshire, where the greatest chances for widespread flash flooding exists. Additionally, tornadoes and damaging winds are possible across the Northeast and Mid-Atlantic States until late tonight. Residents and visitors in these regions are reminded to stay weather aware and have multiple ways to receive warnings. The aforementioned cold front entering the Mid-Atlantic tonight is forecast to stall along the East Coast to end the work week, with an increase in thunderstorm coverage on Friday. At least a few inches of rainfall are forecast to impact areas from coastal South Carolina to southern New Jersey, including much of the eastern Mid-Atlantic. A Slight Risk (level 2/4) of Excessive Rainfall has been issued for this region on Friday to highlight the potential for scattered flash flooding. Not only will this frontal boundary increase rainfall chances, but dangerous heat experienced across the East will greatly abate for the end of the week. Extreme and record-breaking heat will continue throughout much of the West, with the focus beginning to shift out of the Pacific Northwest and towards the High Plains, while remaining in the Southwest. Highs are forecast to soar into the upper 90s and triple digits for these locations, with 110s and 120s possible in the typically hot desert/interior valley locations of California, Arizona, and Nevada. Dozens of daily high temperature records are forecast on Thursday and Friday from the West Coast to the High Plains. Excessive Heat Warnings and Heat Advisories remain in effect for much of the western United States in order to further highlight the dangerously hot temperatures. This level of heat for many people will create an extreme risk of heat-related illnesses when access to adequate cooling or hydration is not available. Be sure to follow proper heat safety, which includes staying hydrated, wear light clothing, avoid outdoor activity, and using air conditioning. Elsewhere, the combination of power outages from Hurricane Beryl and heat indices up to 106 degrees prompted Heat Advisories to be issued across parts of southeast Texas. Scattered showers and storms are also possible throughout the Midwest and southern Rockies through tonight. Storms in the Midwest could contain locally heavy rain and hail. For the southern Rockies, locally heavy rain overlapping with sensitive burn scars could create chances for additional rounds of flash flooding. Flood Watches are in effect. Snell Graphics available at https://www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php