Weather on Thursday May 9 2024 pm showers in NYC ,,, Rain Ohio and Tenn Valley, Dry west coast

Severe thunderstorms and flash flooding are likely from parts of theOzarks to the Tennessee Valley tonight before the severe weather threatshifts south on Thursday toward the Southern Plains and Southeast......Heavy mountain snow and and moderate lower elevation rain graduallywanes across the Northern Rockies on Thursday......Above average temperatures remain across southern Texas and theSoutheast, while warmth also begins to build into the Northwestlate-week...Active weather is ongoing and expected to continue through tonight acrossparts of the middle/lower Mississippi valleys, Tennessee Valley, and intothe southern Appalachians. The atmospheric setup includes an upper lowover the Northern Plains with associated troughing extending into theSouthwest, allowing for moist southerly flow into the Mid-South. Aquasi-stationary boundary extending into the Ohio Valley and detachedoutflow boundary in the Tennessee Valley will provide a focus for stormsto develop and track along. Numerous thunderstorms are expected to becomesevere and possibly contain very large to giant hail, damaging wind gusts,and some strong tornadoes possible. The Storm Prediction Center has issueda Moderate Risk (level 4/5) of severe weather between south-centralMissouri to Middle Tennessee and south-central Kentucky. Additionally, asstorms overlap with saturated soil from earlier rainfall and train behindone another, numerous instances of flash flooding are possible. Thegreatest risk for flash flooding is across southwestern Kentucky andMiddle Tennessee, where a Moderate Risk (level 3/4) of Excessive Rainfallis in effect. By Thursday, the overnight thunderstorm activity isanticipated to sink southward and impact areas from the Southern Plains tothe Southeast. Very large hail appears probable across parts of centralTexas and into the ArkLaTex region, with a broader region of severe hailand damaging wind potential extending through the lower Mississippi Valleyinto the Southeast. Areas of flash flooding are also possible along thiscorridor stretching between eastern Texas and central Georgia. As theassociated cold front continues to push south and east on Friday, thescattered thunderstorms threat is expected to linger, but remain confinedto the Southeast.A long duration heavy precipitation event is also ongoing throughout theNorthern Rockies and parts of the northern High Plains through at leastThursday. The upper low over the Northern Plains continues to funnelmoisture into favorable upslope regions of Montana and Wyoming. Heavy snowremains probable into tonight across the higher elevated ranges, withmoderate rainfall in the lower elevations. As the upper low weakens andbecomes more elongated, precipitation is also expected to weaken whilealso sliding southward into the central/southern Rockies. Additionally,the well below average temperatures are forecast to remain throughout theRockies with a warmer trend beginning by the end of the week.Warm weather for the final few days of the workweek can be expected acrossthe Northwest, Southeast, Gulf Coast, and southern Texas. Locations inthese regions can anticipate highs around 10 to 15 degrees above average,with a few daily record highs potentially being tied/broken. As far asactual high temperatures go, southern Texas will be by far the hottestwith highs into the triple digits and upper 90s. Low-to-mid 90s areforecast across Florida on Thursday, with 80s and 90s throughout the restof the Gulf Coast and Southeast. Meanwhile, the Pacific Northwest willalso need to break out the summer clothing and stay hydrated as highs soarinto the 80s by Friday, with low 90s possible in localized interior valleylocations from central California to Oregon.