textproduct: Melbourne

KEY MESSAGES

Issued at 220 AM EDT Sat Aug 29 2026

- An active pattern will persist across east central Florida this weekend into next week as onshore flow pushes the east coast sea breeze inland, with the sea breeze collision each afternoon coinciding with peak coverage of activity.

- Warm and muggy conditions persist across east central Florida with highs in the upper 80s to mid 90s and peak heat indices exceeding 100F. Practicing heat safety will be key in avoiding the development of heat-related illness.

- There is a moderate risk of rip currents at all local east central Florida beaches today.

DISCUSSION

Issued at 220 AM EDT Sat Aug 29 2026

Today-Tonight...Broad mid-level ridging will remain situated across the Atlantic waters, with some troughing across north Florida continuing to weaken through today. At the surface, the Atlantic high is forecast to lift north of the Florida peninsula as a quasi- stationary boundary draped across the southeastern US weakens and washes out overnight. Locally, this set-up will keep east central Florida under a plume of deep moisture, with PWATs exceeding 2" areawide. Additionally, with the ridge axis shifting northward, the persistent southerly flow will finally shift, becoming more easterly both at the surface and gradually aloft. This will support development of the east coast sea breeze today, with the onshore flow assisting in its progression inland through this afternoon. Initial development of isolated showers and storms along the sea breeze will be possible, with coverage anticipated to increase as the sea breeze pushes inland. The peak coverage will occur in association with the east and west coast sea breeze collision late this afternoon into the evening hours, primarily across Lake and western Orange and Osceola counties. Storm chances will increase through the day as the environment becomes more favorable for development. Daytime heating will lead to increasing instability across the area, with modest low-level lapse rates and MUCAPE of 1800 J/kg and greater forecast. Some drier air aloft will help increase downdraft potential, with DCAPE forecast to range from 700- 1000 J/kg. Due to these parameters, the primary storm hazards for today will include frequent lightning strikes, wind gusts up to 55 mph, and heavy downpours. Minor, localized flooding cannot be ruled out in some spots, with quick rainfall accumulations of 1-3" possible. Shower and storm activity will diminish this evening following the sea breeze collision, with continued development across the local Atlantic waters forecast overnight. The persistent onshore flow may mean some activity makes it to the coast, but chances remain low (20-30%).

Temperatures today are forecast to reach the upper 80s to low 90s along the coast and the low to mid 90s across the interior west of I- 95. While peak heat indices will remain below Heat Advisory criteria, values are still anticipated to range from 100F to 107F. Adequate hydration, frequent breaks in the shade or A/C, and wearing lightweight, lightly colored clothing will all be important in order to prevent heat-related illness. Muggy conditions will persist into the overnight hours, though lows will remain near normal in the low to mid 70s.

At the beaches, a moderate risk of rip currents is forecast due to a developing long-period swell and the onshore flow. Always swim near a lifeguard and never enter the ocean alone. Heed the advice of local beach safety officials and posted flags.

Sunday-Friday...Mid-level high pressure will slowly slide eastward across the southern US through the remainder of the weekend and into next week, where it is forecast to remain the predominant feature aloft over Florida. At the surface, broad high pressure will remain in place, with the ridge axis staying north of the Florida peninsula. Locally, easterly winds both at the surface and aloft are anticipated to prevail, supporting development and intrusion inland of the east coast sea breeze each afternoon. A moist air mass will remain in place across the peninsula with PWATs of 2.0-2.3" locally, keeping rain chances near to slightly above normal (40-80%). Activity will generally move towards the west coast, with an eventual sea breeze collision across the interior leading to increasing coverage during the afternoon and evening hours each day. Storm development will be possible with this activity, with lightning strikes, gusty winds, and heavy downpours likely the primary concerns. Shower and storm activity will diminish into the overnight hours, though continued development across the local Atlantic waters cannot be ruled out each night along with a low chance for some light showers moving onto the coast due to the prevailing easterly flow. Outside of shower and storm chances, anticipate temperatures remaining generally near normal with highs in the upper 80s to low 90s and lows in the low to mid 70s. Humid and muggy conditions will persist, with a low chance of reaching Heat Advisory criteria in some spots late next week. Residents and visitors will be encouraged to remain adequately hydrated if spending extended periods of time outdoors and also take breaks in the shade or a building with A/C to help prevent the development of heat-related illness.

MARINE

Issued at 220 AM EDT Sat Aug 29 2026

Generally favorable boating conditions are forecast through this weekend and into next week. The Atlantic ridge axis will lift north of the local waters today and remain situated to the north into next week, resulting in persistent easterly flow locally. Wind speeds are forecast to generally remain between 5 to 10 knots through the period. While seas are anticipated to stay below cautionary criteria, the onshore flow will promote slight building to 2 to 4 feet, highest across the offshore waters. Isolated to scattered shower and storm development will be possible in the persistent onshore flow, with activity moving towards the peninsula. Cloud-to- water lightning strikes, wind gusts in excess of 30 knots, heavy downpours, and locally higher seas will all be possible with activity.

AVIATION

(12Z TAFs) Issued at 632 AM EDT Sat Aug 29 2026

ISO-SCT SHRA and ISO TSRA over the Atlantic waters have remained mostly offshore, but a few may brush the coast from KSUA-KTIX through late morning. Increasing onshore flow (E-SE around 10 kts) will get the east coast sea breeze going early around 17Z and pushing inland quickly. Additional TS/SH expected to develop along/ahead of the boundary. VC/PROB30/TEMPO timing based on latest HRRR/HREF guidance, calling for mainly ISO-SCT TS mainly after 19Z, with a sea breeze collision near to just west of KLEE after 22Z. Enough confidence for TS impacts at KMCO/KISM to add PROB30s with this package. However, some CAMs favor an earlier start and wider coverage, and will need to monitor for SCT-NUM TS developing after 17Z and impacting more inland terminals. Most terminals should see an early end to TS, but activity may linger INVOF KLEE passed 00Z. TS/SH may continue to develop over the Atlantic waters and push onshore through the afternoon and evening, even after the sea breeze and associated TS have moved inland. Coverage of offshore TS/SH expected to increase tonight, and have VC mention at most coastal terminals.

PRELIMINARY POINT TEMPS/POPS

DAB 89 76 88 76 / 30 30 50 10 MCO 94 76 91 76 / 40 20 70 10 MLB 90 78 90 77 / 30 30 50 20 VRB 90 77 89 76 / 40 30 50 20 LEE 92 76 91 76 / 50 30 70 10 SFB 93 76 91 76 / 40 20 70 10 ORL 93 77 91 77 / 40 20 70 10 FPR 90 76 89 76 / 40 30 50 20

MLB WATCHES/WARNINGS/ADVISORIES

FL...None. AM...None.