Changes Since Sunday Evening:

•      Storm Prediction Center has expanded the Enhanced Risk of Severe Weather (Level 3 of 5)to now include the I-75 corridor of south Georgia and the Suwannee Valley of Florida
•      Rainfall forecast has decreased enough to remove mention of Moderate riverine flooding from this briefing. (Minor riverine flooding is still possible.)
•      Storm Watches and Gale Watches have been upgraded to warnings
•      High Wind Warnings and Wind Advisories have been issued
•      High Surf Warnings and Advisories have been issued

Summary:

A significant high-impact and severe weather event will affect the region tonight and Tuesday. See the attached Briefing Packet and severe thunderstorm timing graphics for more details. 

Impacts will include:

• Severe Thunderstorms.There's an Enhanced Risk (Level 3 of 5) of severe thunderstorms for the entire service area. Outlook and timing graphics attached. Severe modes:
  •     o Strong tornadoes possible
  •     o Damaging to Destructive wind gusts
  •     o Large Hail
•      Strong, damaging general winds(outside of thunderstorms)
•      Pockets of Flash Flooding, including rapid rises on creeks and streams. There's a Slight Risk (Level 2 of 4) of Excessive Rainfallover the Panhandle and the Alabama Wiregrass.
•      Minor river floodingin many river systems in the days following heavy rain. 
•      Minor to moderate coastal floodingaround Apalachee   Bay on Tuesday.
•      Life-threatening High Surf.Beach Erosion.
•      Marine Hazards: Solid gale-force winds (34+ knots) with storm-force gusts (48+ knots)