Moderate

* WHAT...Heat index values up to 110 expected. Locally higher heat indices are possible for a brief period. * WHERE...Portions of southeast North Carolina and northeast South Carolina. * WHEN...From 11 AM this morning to 8 PM EDT 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. Take extra precautions when outside. Wear lightweight and loose

* WHAT...Heat index values up to 110 degrees. * WHERE...Portions of central and south Mississippi, southeast Arkansas, and northeast Louisiana. * WHEN...Until 8 PM CDT Monday. * IMPACTS...High temperatures and high humidity may cause heat related illnesses. * ADDITIONAL DETAILS...Temperatures at night will not bring much relief as they struggle to fall below 80 in some cases. The threat for dangerous heat will continue into next week. Drink plenty of fluids, stay in an air-conditioned room, stay out of

Please refer to the Dense Fog Advisory for more details.

Dense valley fog has developed overnight in typical areas but also into less frequently occurring locations, including in the southern Champlain Valley affecting Route 22A and US-4. The fog is more patchy across the higher terrain, but still present in many narrow higher terrain valleys. The fog will become more widespread around daybreak and reduce visibility to a half mile or less. Drivers are urged to use caution this morning and be prepared for rapidly changing visibility. Fog is expected to dissipate by

* WHAT...Life-threatening rip currents. * WHERE...Exposed beaches of northern, eastern, and southern Puerto Rico, Vieques, Culebra, and the U.S. Virgin Islands. * WHEN...Through late Sunday night. * IMPACTS...Rip currents can sweep even the best swimmers away from shore into deeper water, where it becomes difficult to return to safety. There is a high risk of rip currents. Rip currents are powerful channels of water flowing quickly away from shore, which occur most often at low spots or breaks in the

Areas of dense fog have developed, especially along the Hudson and Mohawk River valleys. The fog is more patchy across the higher terrain, but still present in many narrow higher terrain valleys. The fog will reduce visibility to a half mile or less, so drivers are urged to use caution this morning and be prepared for rapidly changing visibility. The fog is expected to dissipate by around 9 AM.

* WHAT...Visibility one quarter mile or less in dense fog. * WHERE...Portions of north central Maryland, northwest Virginia, and eastern West Virginia. * WHEN...Until 9 AM EDT 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...Visibility one quarter mile or less in dense fog. * WHERE...In Maryland, Allegany and Garrett Counties. In West Virginia, Hampshire and Mineral Counties. * WHEN...Until 9 AM EDT 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...High waves and dangerous currents expected. * WHERE...Beaches along Lake Michigan in Manitowoc County. * WHEN...From 8 AM CDT this morning through this evening. * IMPACTS...Dangerous swimming conditions are expected. Strong currents can pull swimmers into deeper water and high waves can sweep people off piers. * ADDITIONAL DETAILS...Several beaches that will be most susceptible to the dangerous swimming conditions include... Point Beach, Neshotah Beach and Red Arrow Beach in Manitowoc County.

At 234 AM CDT, Doppler radar was tracking a strong thunderstorm near Protection, moving east at 10 mph. HAZARD...Wind gusts of 50 to 55 mph and half inch hail. SOURCE...Radar indicated. IMPACT...Gusty winds could knock down tree limbs and blow around unsecured objects. Minor hail damage to vegetation is possible. Locations impacted include... Buttermilk. If outdoors, consider seeking shelter inside a building. Torrential rainfall is also occurring with this storm and may lead to