1. NWS Web Briefing March 1, 2010 National Weather Service Miami/South Florida Forecast Office

2. Strong Storms Possible Tuesday Low pressure developing in the Gulf of Mexico today will move east and across North Florida tomorrow. Line of showers and thunderstorms is forecast to move through south Florida tomorrow. Cold front moves through area late tomorrow.

3. Current Conditions

4. Tonight

5. Tuesday AM Cold front and possible squall line approaches SW Florida coast between 7-9 AM

6. Jet Stream Adds Punch to Storms

7. Tuesday Evening

8. SPC Outlook 15% probability of winds > 58 mph

9. Timing and Impacts Main impact expected to be strong wind gusts 40-60 mph or higher, possibly resulting in broken tree branches and downed power lines. Very slight chance of a tornado. Very slight chance of hail. No rainfall flooding concerns. Gusty winds outside of storms Tuesday and Tuesday night (20-30 mph sustained) Coastal flooding possible SW coast Tuesday night.

10. Timing and Impacts Squall line expected to move onshore SW Gulf coast between 7-9 AM. Lake Okeechobee region between 9-10 AM Palm Beaches 10 AM to Noon Broward/Miami-Dade 11 AM to 1 PM Limiting factor is lack of strong heating and moisture return to area. Higher chance of impacts from Palm Beaches to Miami due to later arrival of squall line which gives atmosphere more time to destabilize.

11. Questions? Thank you for your time! National Weather Service Miami/South Florida Forecast Office