Expected

* WHAT...Visibility one quarter mile or less in dense fog. * WHERE...Portions of northwest Minnesota and northeast North Dakota. * WHEN...Until 10 AM CDT this morning. * IMPACTS...Low visibility could make driving conditions hazardous. If driving, slow down, use your headlights, and leave plenty of distance ahead of you.

* WHAT...Dangerously hot conditions with temperatures 101 to 106 in Santa Cruz and Cochise Counties and 107 to 112 elsewhere. Major to Extreme HeatRisk is expected. * WHERE...Eastern Cochise County below 5000 feet, South Central Pinal County, Southeast Pinal County, Tohono O'odham Nation, Tucson Metro Area, Upper Gila River Valley, Upper San Pedro River Valley, Upper Santa Cruz River Valley/Altar Valley, and Western Pima County. * WHEN...From 10 AM Thursday to 8 PM MST Sunday.

* WHAT...Dangerously hot conditions with highs 110 to 120 degrees across the Mojave Desert. Highs 100 to 110 degrees across most of the southern Great Basin and Arizona Strip. Little to no overnight relief is expected, particularly in the Mojave Desert where lows of 80 to 95 degrees are forecast. This will result in major to extreme heat risk. * WHERE...Portions of northwest Arizona, southeast California, and south central and southern Nevada. * WHEN...From 10 AM PDT / MST Thursday to 8 PM PDT / MST Sunday.

* WHAT...Hot conditions expected with highs 80 to 90 degrees above 8000 feet and 90 to 105 degrees below 8000 feet. This will result in moderate heat risk. * WHERE...In California, Eastern Sierra Slopes and White Mountains of Inyo County. In Nevada, Sheep Range and Spring Mountains-Red Rock Canyon. * WHEN...From 10 AM Thursday to 8 PM PDT Sunday. * IMPACTS...Hot temperatures may cause heat illnesses. Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors.

* WHAT...Strong currents and dangerous swimming conditions expected. * WHERE...Beaches of Chautauqua County. * WHEN...From 2 PM EDT this afternoon through Wednesday afternoon. * IMPACTS...Strong currents and dangerous swimming conditions. Stay out of the water to avoid dangerous swimming conditions.

* WHAT...Strong currents and dangerous swimming conditions expected. * WHERE...Beaches of Niagara and Orleans Counties. * WHEN...From this evening through Wednesday evening. * IMPACTS...Strong currents and dangerous swimming conditions. Stay out of the water to avoid dangerous swimming conditions.

* WHAT...Strong currents and dangerous swimming conditions expected. * WHERE...Beaches of Monroe, Wayne, northern Cayuga, and Oswego Counties. * WHEN...From this evening through Thursday afternoon. * IMPACTS...Strong currents and dangerous swimming conditions. Stay out of the water to avoid dangerous swimming conditions.

* WHAT...Life-threatening waves and currents expected. - High wave action: Waves building to 3 to 5 feet this morning building to 5 to 8 feet Tuesday afternoon and evening. - Life threatening rip, longshore, and structural currents are expected. Structural currents may be especially strong on the north sides of piers or breakwalls Tuesday afternoon and evening. * WHERE...In Indiana, Northern La Porte county. In Michigan, Northern Berrien and Southern Berrien counties. * WHEN...Through Wednesday morning.

At 403 AM EDT, Doppler radar was tracking a strong thunderstorm near Grafton, or 9 miles northwest of Medina, moving southeast at 35 mph. HAZARD...Wind gusts up to 50 mph. SOURCE...Radar indicated. IMPACT...Gusty winds could knock down tree limbs and blow around unsecured objects. Locations impacted include... Akron, Medina, Cuyahoga Falls, Brunswick, North Royalton, Wadsworth, Tallmadge, Rittman, Wellington, Lodi, Creston, West Salem, Chippewa Lake, Norton, Hinckley, Fairlawn, Munroe Falls, Richfield, Silver

* WHAT...Heat index values up to 109 expected. * WHERE...Portions of central, east central, northern, northwest, southeast, southern, southwest, and western Oklahoma and northern Texas. * WHEN...From 11 AM this morning to 9 PM CDT this evening. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses. Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors.