Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 300 PM EDT Tue Aug 11 2020 Valid 00Z Wed Aug 12 2020 - 00Z Fri Aug 14 2020 ...Heat Advisories for portions of the Northeast through Wednesday; heavy rains slated for the Mid-Atlantic states Wednesday and Thursday... ...Severe thunderstorms possible over the Northern/Central Plains into Thursday... ...Elevated fire weather conditions continuing in portions of the Western U.S... A front will push into southeast New England and the Mid-Atlantic States before slowing to a crawl thereafter. This will cause temperatures to soar into the 90s, and humidity will push heat indices to 100+ degrees ahead of the front both Tuesday and Wednesday afternoon. Heat advisories are in effect for much of New England and New York Tuesday and for southeast New England into Wednesday Warm overnight lows in the 70s also make it difficult for the body to recover from the heat. Avoiding strenuous outdoor activities and ensuring you have or can find a safe, air conditioned environment is advised. Heat advisories on Tuesday include New York and Boston, while Philadelphia, Baltimore, and Washington will also experience very hot weather into Wednesday. The stalling front also brings the promise of more showers and thunderstorms to portions of the Mid-Atlantic States, where soils have become sensitive due to heavy rains over the past couple of weeks. A Slight Risk of excessive rainfall/flash flooding exists on Wednesday and Thursday. A slowly progressive cold front is expected to produce windy conditions, but little precipitation, which both will factor into elevated to critical fire weather conditions Tuesday and Wednesday across portions of the Northwest, Northern Rockies and Great Basin, and areas around northwest Nevada on Thursday. Red Flag Warnings are in effect for many of these areas. And with very little monsoon moisture to speak of, daytime temperatures remain well above 100 degrees in the Desert Southwest. An Excessive Heat Watch has been posted for desert areas in southern California and southern Arizona starting Wednesday, as high temperatures may commonly reach 110 to 115 degrees from mid to late week, with Death Valley itself likely to reach the mid 120s. Moisture returning into the Plains ahead of the incoming front will keep severe weather in the offing for the Northern and Central Plains into Thursday. Roth Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php