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Tropical Storm Franklin

Potential Tropical Cyclone Seven (PTC7), after crossing the Atlantic from off the African Coast and being named Invest 97L, then Invest 90L, became a PTC at the 5 PM advisory on August 6, 2017 with winds of 35 mph and a central pressure of 1008 mb.

It was upgraded to Tropical storm Franklin at the 11 PM advisory on August 6, 2017 with winds of 40 mph and a pressure of 1006 mb. The storm began to strenghten and organize quickly the morning of August 7, 2017 as by the 11 AM advisory, it had become a 60 mph tropical storm with a central pressure of 999mb.

Franklin peaked first with winds of 60 mph and a central pressure of 995mb before its first landfall, which brought its winds down to 45 mph and pressure down to 1001 mb.

Impacts

The development of the storm prompted tropical storm warnings and watches to be issued for the Yucatan Peninsula, and the next morning, hurricane watches were issued on the Yucatan Peninsula due to the storm becoming a strong tropical storm overnight.

Franklin made its first landfall just before 11 PM CDT on August 7, 2017 near Pulitcub, Mexico, bringing high winds and heavy rain to the Yucatan Peninsula.

Which Model Won?

  • ECMWF - First model to find the storm. Discovered it early, followed closely by the NAVGEM. Developed a tropical storm to a weak hurricane over time.
  • CMC - Lacked interest in storm development until the day the storm formed.
  • GFS - Lacked interest early, then slowly caught on, and several runs before formation, developed it into a strong hurricane each run, nearly a cat 2 or 3.
  • NAVGEM - Developed the storm into a strong tropical storm and a weak hurricane at most.
  • UKMET - Moderate tropical storm at best.
  • HWRF - Developed the storm into a massive hurricane once it moved into the gulf, with winds up around a strong cat 2 or 3, then decreased to just barely a cat 1 in the Gulf the day of landfall.
  • HMON-PARA - Developed a hurricane around a cat 1 or 2, and maintained that, though had a run or two later peaking at a cat 3.

End Result:

  • Long - medium range :
  • Short range :
  • Strength :

Threads

Potential Tropical Cyclone 7

Storm Images