Moderate

* WHAT...Heat index values up to 107 in the afternoon. Overnight lows remaining in the mid to upper 70s. * WHERE...Woods County. * 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.

At 1154 AM MDT, Doppler radar was tracking a line of strong thunderstorms extending from 11 miles west of Roundup to 7 miles northwest of Columbus, moving east 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... Columbus, Broadview, Molt, Comanche and Acton. This does NOT include the cityBillings. Strong winds may occur with little to no precipitation.

* WHAT...South winds 25 to 35 mph with gusts up to 50 mph expected. * WHERE...Municipality of Skagway. * WHEN...From 1 PM Tuesday to 1 AM AKDT Wednesday. * IMPACTS...Gusty winds will blow around unsecured objects. Tree limbs could be blown down and a few power outages may result. * ADDITIONAL DETAILS...The strongest winds are expected in the afternoon hours with the initial frontal passage. A brief period of gusts in excess of 50 mph is possible during that timeframe. Winds this strong can make travel difficult. Use extra caution.

* WHAT...High temperatures up to 102 and morning lows up to 75 expected. Widespread Moderate HeatRisk will be present with areas of Major HeatRisk in the foothills where the thermal belt is strongest and in urban areas. * WHERE...The San Joaquin Valley, Sierra Nevada Foothills, and West Side Hills along the Coastal Range. * WHEN...From 10 AM Wednesday to 10 PM PDT Thursday. * IMPACTS...Hot temperatures may cause heat illnesses, especially those without effective cooling and/or adequate hydration.

* WHAT...High temperatures 97 to 102 and low temperatures 65 to 75 expected, with widespread Moderate HeatRisk and areas of Major HeatRisk. * WHERE...The central and southern Sacramento Valley, northern San Joaquin Valley, Delta and Carquinez Strait, Foothills, and portions of the Coast Range. * WHEN...From 10 AM Wednesday to 10 PM PDT Thursday. * IMPACTS...Hot temperatures may cause heat illnesses, especially to anyone without effective cooling and/or adequate hydration.

At 1230 PM CDT, Doppler radar was tracking a strong thunderstorm over Bay St. Louis, moving west at 10 mph. HAZARD...Winds in excess of 40 mph. SOURCE...Radar indicated. IMPACT...Gusty winds could knock down tree limbs and blow around unsecured objects. Locations impacted include... Bay St. Louis, Waveland, Diamondhead, Kiln, and Shoreline Park. This includes Interstate 10 in Mississippi between mile markers 8 and 19. If outdoors, consider seeking shelter inside a building.

* WHAT...For the first Heat Advisory, heat index values up to 107. For the second Heat Advisory, heat index values up to 107 expected. * WHERE...Portions of central, southeast, southwest, and western Arkansas. * WHEN...For the first Heat Advisory, until 7 PM CDT this evening. For the second Heat Advisory, from 11 AM to 8 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

* WHAT...Heat index values up to 107 expected. * WHERE...Conway, Faulkner, Lonoke, Perry, Prairie, Pulaski, Saline, Monroe, Arkansas, and Jefferson Counties. * WHEN...From 11 AM to 8 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. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in

* WHAT...For the first Heat Advisory, heat index values up to 107. For the second Heat Advisory, heat index values up to 107 expected. * WHERE...Portions of central, southeast, southwest, and western Arkansas. * WHEN...For the first Heat Advisory, until 7 PM CDT this evening. For the second Heat Advisory, from 11 AM to 8 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

At 137 PM EDT, Doppler radar was tracking a strong thunderstorm near Pointe West, or near Vero Beach South, moving east at 15 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... Fort Pierce, Vero Beach, Indian River Shores, Vero Beach South, and Gifford. If outdoors, consider seeking shelter inside a building. Frequent cloud to ground lightning is occurring with this storm. Seek