• STORM FLOATER •
SUBTROPICAL STORM 24L (άλφα) PUBLIC ADVISORY #1 FORCE THIRTEEN SINGAPORE, SINGAPORE 1700 UTC FRI SEP 18 2020 ...SUBTROPCIAL STORM FORMS WEST OF PORTUGAL... SUMMARY OF 1500 UTC...INFORMATION ----------------------------------- LOCATION...NEAR 39.9 N 9.3 W... MAXIMUM SUSTAINED WINDS...50MPH...85KM/H MINIMUM CENTRAL PRESSURE...999MB WATCHES AND WARNINGS ----------------------------------- NO WARNINGS IN EFFECT.
DISCUSSION ----------------------------------- The small low pressure area that has been rotating around a larger extratropical low in the far northeastern Atlantic has become better organized this morning. Moderate-to-deep convection has persisted near the center since last night, scatterometer data shows a closed 40-kt low, and radar images from Portugal show a definite organized convective pattern. While the system is still in the cyclonic envelope of the large extratropical low and likely neutral- or cold-core, it has developed enough tropical characteristics to be considered a subtropical storm. The initial intensity is set to 45 kt in accordance with the scatterometer data, assuming some undersampling for this small system. Little change in strength is forecast until landfall in Portugal during the next couple of hours. Global models show the small low moving northeastward at about 15 kt for the next 24 hours before dissipating over northern Spain or the Bay of Biscay. The track and intensity forecasts are consistent with the consensus guidance.
LOCAL AND OFFICIAL SOURCES BELOW National Hurricane Center (Atlantic) NEXT FULL ADVISORY AT SEPTEMBER 18 2020, 2100 UTC. $$ Forecaster Knack
• OFFICIAL FWC-N FORECAST •
• NATIONAL HURRICANE CENTER FORECAST •
