Weather Monday May 20 2024 Fair in the northweast ...Nice weather DC to NYC and Boston...Great traveling weather

An energetic upper-level pattern will bring a couple rounds of storms tothe central U.S. over the next few days. Tonight, moist return flowfollowing a warm front moving northward through the Plains and ahead of adryline over the High Plains will provide more than enough instability totrigger robust thunderstorm development over the Central Plains.Increasing upper-level winds will promote supercells with the threat oflarge hail and a few tornadoes. Storms are also expected to grow upscaleinto one or more organized convective systems, bringing a heightenedthreat for potentially widespread, significant damaging winds later thisevening. As such, the Storm Prediction Center has issued a Moderate Riskof severe weather (level 4/5). Storm chances will shift northeastward intothe Upper Midwest tonight and into the Great Lakes by Monday following aninitial upper-wave/accompanying surface frontal system. An amplifyinglong-wave trough over the West will help to enhance lee cyclogenesis overthe High Plains bringing another chance of storms to the CentralPlains/Missouri Valley by Monday evening. The Storm Prediction Center hasincluded a Slight Risk (level 2/5) for the threat of some more damagingwinds and large hail, and possibly a tornado. Some locally heavy downpourswill also be possible, particularly from the Central Plains into the UpperMississippi Valley tonight and the Central Plains once again Monday, withan isolated chance of flash flooding.There will be a renewed threat for heavy rainfall and thunderstorms overthe Northern/Central Plains and Upper/Middle Mississippi Valley on Tuesdayas a deepening low pressure system tracks across the region. The StormPrediction Center issued an Enhanced Risk (level 3/5) of SevereThunderstorms from eastern Kansas to Southwest Wisconsin. There's also aSlight Risk (at least 15%) of Excessive Rainfall for parts of southern andeastern Minnesota, much of Wisconsin and northern Illinois. There are alsosome isolated chances for severe weather and excessive rainfall intonorthern Texas and eastern Oklahoma.