Moderate

* WHAT...High temperatures in the upper 90s to 103 degrees expected overnight low temperatures in the mid-70s. * WHERE...San Bernardino and Riverside County Valleys-The Inland Empire. * WHEN...From 10 AM Tuesday to 8 PM PDT Thursday. * IMPACTS...Hot temperatures may cause heat illnesses. * ADDITIONAL DETAILS...Moderate to locally major HeatRisk. Elevated low temperatures will limit overnight relief from the heat. Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors.

* WHAT...High temperatures 85 to 95 degrees expected and overnight lows in the mid 70s. * WHERE...Orange County Coastal Areas and San Diego County Coastal Areas. * WHEN...From 10 AM Tuesday to 8 PM PDT Thursday. * IMPACTS...Hot temperatures may cause heat illnesses. * ADDITIONAL DETAILS...Moderate to major HeatRisk. Elevated overnight lows will limit relief from the heat. Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors.

* WHAT...High temperatures in the upper 90s to 100 degrees expected and overnight lows in the low to mid 70s. * WHERE...San Diego County Valleys. * WHEN...From 10 AM Tuesday to 8 PM PDT Thursday. * IMPACTS...Hot temperatures may cause heat illnesses. * ADDITIONAL DETAILS...Moderate to major HeatRisk. Elevated lows will limit overnight relief from the heat. Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors.

* WHAT...High temperatures in the upper 80s to low 90s expected and overnight lows in the 70s below 5000 ft. * WHERE...Riverside County Mountains and San Diego County Mountains. * WHEN...From 10 AM Tuesday to 8 PM PDT Thursday. * IMPACTS...Hot temperatures may cause heat illnesses. * ADDITIONAL DETAILS...Moderate HeatRisk. Elevated lows will limit overnight relief from the heat. Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors.

* WHAT...West winds 25 to 35 mph with gusts up to 55 mph expected. * WHERE...Northwest and north central North Dakota. * WHEN...From 7 AM CDT /6 AM MDT/ to 7 PM CDT /6 PM MDT/ Tuesday. * IMPACTS...Objects left unsecured outside will be blown around. Winds this strong can make driving difficult, especially for high profile vehicles. Use extra caution.

At 211 PM EDT, Doppler radar was tracking strong thunderstorms along a line extending from near Vero Beach to Fort Pierce North to near Treasure Island. Movement was east at 10 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... Port Saint Lucie, Walton, Fort Pierce, Stuart, and Vero Beach. If outdoors, consider seeking shelter inside a building.

* WHAT...West winds 25 to 35 mph with gusts up to 50 mph expected. * WHERE...Portions of northwest Minnesota and northeast and southeast North Dakota. * WHEN...From 10 AM to 7 PM CDT Tuesday. * IMPACTS...Gusty winds will blow around unsecured objects. Tree limbs could be blown down and a few power outages may result. Winds this strong can make driving difficult, especially for high profile vehicles. Use extra caution. Secure outdoor objects.

At 1148 AM MDT, Doppler radar was tracking a strong thunderstorm 19 miles south of Grass Range, or 27 miles northwest of Roundup, moving east at 50 mph. HAZARD...Wind gusts of 50 to 55 mph and penny size hail. SOURCE...Radar indicated. IMPACT...Gusty winds could knock down tree limbs and blow around unsecured objects. Minor hail damage to vegetation is possible. This storm will remain over mainly rural areas of southeastern Fergus County. If outdoors, consider seeking shelter inside a building.

At 153 PM EDT, National Weather Service meteorologists were tracking strong thunderstorms along a line extending from near Clewiston to 7 miles west of Lake Harbor to 8 miles northwest of Rotenberger Wildlife Refuge to near Big Cypress Seminole Reservation. Movement was east at 15 mph. HAZARD...Wind gusts of 45 to 50 mph. SOURCE...Radar indicated. IMPACT...Gusty winds could knock down tree limbs and blow around unsecured objects. Locations impacted include...

* WHAT...Heat index values up to 108 in the afternoon. Overnight lows remaining in the mid to upper 70s. * WHERE...Portions of central, east central, northern, northwest, southeast, southern, and southwest Oklahoma and northern Texas. * WHEN...Until 7 PM CDT Tuesday. * 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.