Area Forecast Discussion
Issued by NWS Melbourne, FL
Issued by NWS Melbourne, FL
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123 FXUS62 KMLB 201950 AFDMLB Area Forecast Discussion National Weather Service Melbourne FL 350 PM EDT Mon May 20 2024 ...New DISCUSSION, MARINE... .DISCUSSION... Issued at 350 PM EDT Mon May 20 2024 Key Messages... -Isolated stronger storms still possible late this afternoon into early evening near Lake Okeechobee and the southern Treasure Coast. -Hotter and drier than normal conditions forecast from mid to late week. -Scattered afternoon showers and storms returning into the holiday weekend. Currently-Tonight...Still can`t rule out a few stronger storms developing across Okeechobee, St. Lucie and Martin counties late afternoon through early evening. Slow southward moving front and sea/lake breeze boundaries in this region may still spark developing convection across this area. Main threats will continue to be strong to locally damaging winds of 40-60 mph, and hail up to an inch in diameter. However, frequent lightning and locally heavy rainfall will also occur with any stronger convection. Additional isolated showers and storms still possible farther north through sunset, but rain chances remain lower around 20-30 percent. Any showers or storms will diminish through the evening, and then a developing low level onshore flow may allow for a few onshore moving showers along the coast, mainly north of Vero Beach overnight. Breezy N/NE winds will continue behind the front through sunset and then winds diminish into tonight. Overnight lows will fall to the mid 60s to low 70s across the area, with skies mostly clear to partly cloudy. Tuesday...Mid-level trough over the western Atlantic remains extended across the state, with weakened sfc front south of the central FL, and attached to weak low east of the area. PW values increase slightly up to 1.4-1.5" in the low level northeast flow, which will still be sufficient for isolated to scattered shower and storm development tomorrow. Rain chances will initially be limited along the coast in the morning, transitioning inland with the east coast sea breeze through late morning into the afternoon. Highs will still be seasonably warm, ranging from the low to mid 80s along the coast and mid to upper 80s across the interior. Rain chances diminish into Tuesday night, with lows in the upper 60s to low 70s. Wednesday-Sunday...(Modified Previous Discussion) Ridging over the western Gulf of Mexico slides eastward, extending into Florida. A short wave trough moving into the eastern CONUS will then work to flatten ridging in place by late week. The area of anomalous ridging aloft will support drying conditions and warming temperatures at the start of the extended period. Onshore flow continues to promote an east coast sea breeze regime mid to late week, with only an isolated mention of convection each afternoon, mainly near the Lake Okeechobee region. Surface flow begins to veer southerly Thursday night, returning moisture and a mention of scattered precip chances by the weekend. High temperatures in the upper 80s (coast) to lower 90s (inland) on Wednesday follow a gradual warming trend each day into late week. High temperatures then in the low to mid 90s across the entire area Saturday and Sunday. && .MARINE... Issued at 350 PM EDT Mon May 20 2024 Tonight...Weak frontal boundary will shift south of the Treasure Coast waters this evening, with N/NE winds up to 15-20 knots north of Sebastian Inlet, decreasing to 10-15 knots to the south. Small craft should exercise caution over the Volusia/Brevard County waters for these elevated winds and seas building up to 6 feet offshore. N/NE winds will diminish overnight to 5-10 knots late tonight, but poor boating conditions will continue offshore of Volusia and Brevard counties as seas up to 6 feet linger. Isolated stronger storms will have the potential to push offshore, mainly near to south of Fort Pierce Inlet late this afternoon and into this evening, producing frequent lightning strikes, gusty winds and possibly some hail. Tuesday-Sunday...(Modified Previous Discussion) Northeast winds into Tuesday gradually veer onshore into mid week, remaining 7-12 kts. Winds weaken further into Friday to around 5-10 kts and veer to the south, with winds becoming E/SE each afternoon and evening from late week and into the holiday weekend as the sea breeze develops each day and moves inland. Seas up to 5 ft in the Gulf Stream on Tuesday gradually subside, and seas become 2-3 ft by Wednesday evening, and fall even further to around 2 ft into Friday and Saturday. Isolated to scattered showers and lightning storms are still possible across the coastal waters on Tuesday, with coverage following a downward trend each following day through mid to late week. Potential for showers and storms then increase into the weekend. && .AVIATION... (18Z TAFs) Issued at 129 PM EDT Mon May 20 2024 VFR conditions prevailing. A few showers present on KMLB radar early this afternoon have led to VCSH inclusion for areas from MCO northward into mid-afternoon. Otherwise, areas are expected to remain mostly dry today. To the south, higher confidence in showers and storms this afternoon, with VCTS included for the Treasure Coast, as the sea breeze moves inland. A TEMPO group has been included for SUA, which has the highest chance for seeing any reductions due to convection. Any convection is expected to diminish into late evening. Winds have already veered northeasterly behind the sea breeze for coastal terminals from around TIX southward. The sea breeze is forecast to move inland into this afternoon, with gusts up to 25kts possible. Winds will diminish after sunset and back northerly once again. && .PRELIMINARY POINT TEMPS/POPS... DAB 69 84 70 85 / 10 30 0 10 MCO 70 87 70 90 / 10 40 0 10 MLB 72 85 72 86 / 20 30 10 10 VRB 70 87 71 88 / 20 30 10 20 LEE 68 88 71 91 / 10 40 0 10 SFB 68 87 70 90 / 10 40 0 10 ORL 71 88 71 90 / 10 40 0 10 FPR 69 87 70 87 / 20 30 10 20 && .MLB WATCHES/WARNINGS/ADVISORIES... FL...None. AM...None. && $$ DISCUSSION...Weitlich AVIATION...Leahy