Marco weakened to a tropical storm and will move near the Louisiana coast on Monday, then continue to lose strength, while lightning storms could grow California fires and high heat across the western half of the US.
As of 7 AM Monday morning, Hurricane Marco has been downgraded to a tropical storm with sustained winds of 50 mph, according to the the national hurricane Center (NHC), NOLA reported. The center of the storm was roughly 85 miles southeast of the mouth of the Mississippi River, moving northwest at 10 MPH.
Marco is forecast to approach the coast of Louisiana on Monday afternoon, turn West, and move very close to the coast of Louisiana through Tuesday night. The storm is expected to continue to break apart, weakening to a tropical depression late Tuesday and dissipate Wednesday as it reaches Texas.
Parts of Louisiana, including New Orleans and Lake Pontchartrain were under a tropical storm warning on Monday, as well as coastal areas that were under a storm surge warning.
Parts of the Southwest will see scorching triple digit heat, while parts of the central US in the Ohio Valley will see mid to high 90s.
The National Weather Service (NWS) has issued heat alerts for parts of the Southwest and upper Midwest on Monday.
Excessive heat warning: southeastern California and desert areas; southern Nevada; northwestern central, southern and southeastern Arizona.
Heat advisory: south-central and southeastern South Dakota; north-central, central and northeastern Nebraska; southern Minnesota; northwestern and northeastern Iowa; southwestern Wisconsin.
The National Weather Service is warning of severe thunderstorms over portions of central and eastern Minnesota, extending into central, western and southeastern Wisconsin on Monday.
A major severe weather event is forecast for Tuesday, stretching from the Ohio Valley from portions of Ohio, West Virginia and Virginia, and extending over the entirety of the northeastern states.
West: San Francisco 72, partly cloudy; Los Angeles 88, partly cloudy; San Diego 81, partly cloudy; Reno 92, rain; Las Vegas 108, mostly sunny; Salt Lake City 96, partly cloudy; Denver 97, mostly sunny.
Northwest & Northern Rockies: Seattle 76, partly cloudy; Medford 92, partly cloudy; Boise 89, partly cloudy; Cut Bank 93, partly cloudy; Billings 99, mostly sunny; Minot 88, sunny; Rapid City 92, sunny.
Southwest: Phoenix 115, sunny; Tucson 108, partly cloudy; Albuquerque 97, mostly sunny; El Paso 99, mostly sunny; San Antonio 97, mostly sunny; Brownsville 93, partly cloudy.
Central & Upper Midwest: Lubbock 94, sunny; Dallas 97, sunny; Oklahoma City 96, sunny; Kansas City 95, sunny; Minneapolis 88, thunderstorms; Madison 93, mostly sunny.
Ohio Valley: Chicago 94, sunny; St. Louis 94, sunny; Detroit 89, thunderstorms; Cincinnati 88, mostly sunny; Indianapolis 90, mostly sunny.
South: Houston 96, partly cloudy; New Orleans 82, rain; Memphis 94, sunny; Birmingham 85, cloudy Atlanta 82, rain; Charlotte 85, rain; Jacksonville 88, thunderstorms; Tampa 91, thunderstorms; Miami 89, thunderstorms.
East: Norfolk 88, mostly cloudy; Washington, D.C. 89, thunderstorms; Philadelphia 89, partly cloudy; Buffalo 83, mostly sunny; New York 91, thunderstorms; Boston 87, thunderstorms; Caribou 79, partly cloudy.