NWS Web BriefingMarch 1, 2010

National Weather Service

Miami/South Florida

Forecast Office

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.

Current Conditions

Tonight

Tuesday AM

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

Jet Stream Adds Punch to Storms

Tuesday Evening

SPC Outlook

15% probability of winds > 58 mph

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.

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.

Questions?

Thank you for your time!

National Weather Service

Miami/South Florida Forecast Office