Se confirma la progersión del sistema 99A, porque el JTWC ha lanzado aviso de formación tropical:
AN AREA OF CONVECTION HAS PERSISTED NEAR 16.4N 65.9E,
APPROXIMATELY 425 NM WEST-SOUTHWEST OF MUMBAI, INDIA. RECENT
ANIMATED INFRARED SATELLITE IMAGERY SHOWS DEEP CONVECTION DEVEL-
OPING NEAR A CONSOLIDATING LOW LEVEL CIRCULATION CENTER (LLCC)
EVIDENT IN A 042120Z AMSR-E MICROWAVE SATELLITE IMAGE. STRONG LOW
LEVEL WESTERLY FLOW ON THE EQUATORWARD SIDE OF THE DISTURBANCE IS
AIDING SPIN-UP OF THE LLCC. ADDITIONALLY, ALTHOUGH THE DISTURBANCE
LIES IN A REGION OF MODERATE EASTERLY VERTICAL WIND SHEAR ON THE
EQUATORWARD SIDE OF AN UPPER LEVEL RIDGE AXIS, IT IS TRACKING
STEADILY POLEWARD TOWARD AN AREA OF LOWER VERTICAL WIND SHEAR
CLOSER TO THE RIDGE AXIS. STRONG WESTWARD DIFFLUENCE ALOFT CON-
TINUES TO AID CONVECTIVE DEVELOPMENT, REINFORCING RECENT LOW LEVEL
INTENSIFICATION. MAXIMUM SUSTAINED SURFACE WINDS ARE ESTIMATED AT
27 TO 32 KNOTS. MINIMUM SEA LEVEL PRESSURE IS ESTIMATED TO BE NEAR
1001 MB. BASED ON INCREASING LOW LEVEL ORGANIZATION, AND WITH
MODERATE VERTICAL WIND SHEAR REMAINING AS THE MAIN LIMITING FACTOR,
THE POTENTIAL
FOR THE DEVELOPMENT OF A SIGNIFICANT TROPICAL CYCLONE
WITHIN THE NEXT 24 HOURS IS GOODLa convección en torno al LLCC se consolida. Aunque el sistema navegue en este momento sobre una zona con cizalladura moderada, se espera que se acabe dirigiendo a una zona donde la misma sea baja. Los vientos sistenidos ya rondan los
30kt, y la presión baja a los
1001mbEste sistema, en la cuenca atlántica, ya recibiría la desiganción de NONAME, poque a efectos satelitales, ya es Depresión Tropical. No obstante, como es la cuenca arábiga, hay que esperar a que los vientos aumenten a 35kt, para que sea desiganda como NONAME, pero en forma de Tormenta Tropical