Disturbance 90L – Guidance Messages
Disturbance Guidance Message 1 The Hurricane Network New York NY AL902020 500 PM EDT Thu May 14 2020 This product covers the latest information on Invest (Disturbance) 90L, which is currently located over the Straits of Florida. .SUMMARY OF LATEST INFORMATION... At 500 PM EDT (2100 UTC), Disturbance 90L was located at 23.7 north latitude and 81.2 west longitude. Surface observations and satellite data indicates sustained winds near 30 kt and an estimated central pressure of 1013 mb. .SYNOPSIS... The disturbance located over the Straits of Florida is in the initial stages of becoming better organized with banding features starting to form meaning a low pressure center is starting to take shape. Environmental conditions are expected to remain favorable and this disturbance is expected to become a tropical or subtropical cyclone within the next day or two. .SATELLITE DISCUSSION... An earlier ASCAT pass indicates the system lacks a center of circulation and remains an open trough. The scatterometer data shows in the coldest cloud tops wind vectors of near 30 to 35 kt. There are likely higher gusts occurring over waters. .MODEL DISCUSSION... The 18z model suite remain in good agreement with the overall track of the disturbance. The disturbance will likely continue the move north-northeastward before making a sharp northeast turn due to an approaching frontal system located over the eastern United States. The system is then forecast to accelerate north of Bermuda by day 4. Intensity wise, the system will slowly intensify over days 1 to 3 due to some upper-level winds near the Bahamas. Once becoming attached to the frontal system, the system will begin to intensify baroclinically and could reach a peak strength around 50 kt. We will have a more defined model guidance on the intensity by 0z. .HAZARDS... Key messages for Disturbance 90L are available on the web at https://thehurricanenet.com/keymsg.png Heavy rainfall and gusts near tropical-storm-force will continue for portions of southern Florida and the Bahamas through this weekend. Rainfall estimates for southern Florida could exceed 2 inches, high amounts towards 2 inches are possible in localized areas. In the Bahamas, rainfall amounts could exceed 4 inches with rainfall amounts near 6 inches in some areas. Marine Hazards: Gale warnings are currently in effect for the waters off southern Florida and the Straits of Florida. Increased surf is possible for the south shore of Florida. For additional information on hazards, refer to the National Weather Service on the web at weather.gov .HURRICANE HUNTER OUTLOOK... A US Airforce Hurricane Hunter aircraft is scheduled to investigate this disturbance on Friday afternoon, resources permitting. && The next guidance message on this system will be issued by 9 PM EDT. $$ Forecaster Latteri/Anderson
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