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Area Forecast Discussion
Issued by NWS Melbourne, FL
Issued by NWS Melbourne, FL
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976 FXUS62 KMLB 162355 AFDMLB Area Forecast Discussion National Weather Service Melbourne FL 755 PM EDT Tue Jul 16 2024 ...New AVIATION... .AVIATION... (00Z TAFs) Issued at 755 PM EDT Tue Jul 16 2024 Lingering outflow boundary pushing southeast through the Treasure Coast may produce brief gusts out of the NW up to 20 knots at KVRB-KFPR. However, any additional shower/storm development along this boundary is not forecast, as it is moving into a drier airmass. Light rain will diminish over the next hour or two from KTIX northward, with rest of the night remaining mostly dry. Still can`t rule out an isolated onshore moving shower or two along the coast, south of KVRB. However, potential is too low to include any mention in the TAFs for now. Drier airmass building into southern portions of east central Florida will again keep rain chances limited along the coast from KMLB southward tomorrow. However, scattered shower and storm development is still forecast near to northwest of the I-4 corridor where greater moisture will still exist. Have VCTS mentioned in the TAFs from around 18z-00Z for KISM-KTIX northward. Light and variable winds overnight will become S/SE around 5-7 knots in the morning, and then switching the E/SE with the inland moving east coast sea breeze to around 10 knots. && .PREVIOUS DISCUSSION... Issued at 225 PM EDT Tue Jul 16 2024 ...Highest coverage of afternoon-evening lightning storms across the interior... ...Heat remains a concern through the extended combined with high humidity, producing peak heat indices from 102 to 110 over the next several days... ...Increasing moisture late this week and into the weekend will keep coverage of showers and storms high across the interior... Current-Tonight...The heat continues to be a primary concern with highs in the L-M90s and peak heat indices reaching 102-107F. HeatRisk, a forecast that evaluates whether there is an elevated risk of heat-related impacts, is Moderate to Major across east central Florida. Everyone should continue to take action to prevent heat-related illness, including taking frequent breaks in the shade or in an air conditioned building if spending extended periods of time outdoors as well as remaining well-hydrated. Persistent low-level ridging continues across the central FL peninsula. The ECSB will continue to push inland this afternoon and evening. The combination of deep moisture, surface heating, and boundary collisions will promote SCT-NMRS showers and lightning storms reaching peak coverage and intensity in the late afternoon and early evening. Greatest chances will be west of I-95 and Cape northward. Primary storm threats remain frequent lightning strikes, gusty winds of 40 to 50 mph locally, and heavy downpours. The slow/erratic movement of storms could lead to a quick 1 to 3 inch rainfall total in spots. Minor/nuisance flooding may result in these areas or any locations that have recently seen abundant rainfall. Activity is forecast to diminish thru mid to late evening with clouds thinning overnight. Warm and muggy conditions will persist into the overnight hours, with lows only dropping into the M-U70s. Wednesday...Drier air will infiltrate from the south during the day with PWATs forecast 1.00-1.40 inches across the Treasure Coast and Okeechobee County. Northward, PWATs will trend upward ranging from 2.00-2.10 inches north/west of I-4. As a result, expect lower convective coverage southward - 20-30pct south of a Brevard-central Osceola County line, with 30-55pct north thru Lake/NW Volusia counties. Surface high pressure ridging will remain situated across the central FL peninsula. We will still see inland movement of the afternoon sea breeze with late day boundary collisions across the interior and normal diurnal time-frame for activity to diminish in the evening. High temps still forecast in the L-M90s with peak heat indices 102-107F areawide. The Moderate to Major HeatRisk will remain in place across the area, so continued caution will be needed if spending extended periods of times outdoors. Overnight lows remaining in the M-U70s. Thursday-Monday...Previous Modified...High pressure across the western Atlantic will be the main influence across the Florida peninsula. The ridging will gradually lift from central FL northward this weekend and into early next week. Moisture is forecast to recover across east central Florida, leading to increasing rain and storm chances each afternoon/evening as the sea breeze develops and moves inland, with an eventual collision across the interior producing the highest coverage. This pattern is expected to continue late this week into early next week. Activity will diminish into the overnight hours across the peninsula, with lingering showers and storms remaining possible across the local waters each night. Heat will remain a concern, with temperatures appearing to peak on Thursday and Friday afternoon in the mid to upper 90s and dropping back into the low to mid 90s this weekend through Monday. These temperatures will combine with humidity to produce peak heat indices in the 102 to 110 range. We will monitor the need for Heat Advisories each day. Additionally, HeatRisk is expected to become Extreme across portions of Lake, Orange, and Seminole counties Thursday through Saturday, with Moderate to Major impacts elsewhere and on Sunday and Monday. This means extra caution will need to be taken to prevent heat-related illnesses, and time outside will potentially need to be limited. Little relief will be granted during the overnight hours, with conditions remaining warm and muggy thanks to lows only dropping into the mid to upper 70s. && .MARINE... Issued at 225 PM EDT Tue Jul 16 2024 Through Sat...Persistent pattern with low-level ridging across the local waters, potentially lifting a bit north late in the period. This will continue to produce generally favorable boating conditions. Wind direction generally S/SW at night/morning, backing SERLY each day with sea breeze formation. Wind speeds AOB 15 kts thru the period. Seas mainly 2-3 ft and locally higher invof lightning storms. ISOLD to SCT showers/storms will favor the evening and overnight-early morning hour periods. && .PRELIMINARY POINT TEMPS/POPS... DAB 75 93 75 94 / 20 50 10 40 MCO 75 95 77 96 / 20 40 10 60 MLB 76 91 77 92 / 30 10 10 50 VRB 75 92 77 92 / 20 10 10 50 LEE 77 94 77 95 / 20 50 10 60 SFB 76 94 77 96 / 20 40 10 50 ORL 77 95 77 96 / 20 40 10 60 FPR 75 91 76 92 / 20 20 10 50 && .MLB WATCHES/WARNINGS/ADVISORIES... FL...None. AM...None. && $$ DISCUSSION...Sedlock AVIATION...Weitlich