Storm Planning Timeline. If the forecast calls for severe weather in a few days, start preparing now: make sure that you have emergency supplies; know your safe places; have a family communications plan. The day before, forecast accuracy continues to improve: adjust plans; make sure your phone can receive WEAs; ensure your shelter is clean and accessible. The day of, remain vigilant and aware of any active Watches - a Warning may be issued at a moment's notice: remind your family of the communication plan; know how to evacuation and/or get to safety from wherever you are; whenever a Warning is issued, you may only have seconds to take action!