textproduct: Melbourne

KEY MESSAGES

Issued at 252 PM EDT Sat Oct 17 2026

- There is potential for bands of heavy rainfall to produce flooding across the southern Treasure Coast this afternoon into tonight. Locally high rainfall of 2-4" is possible, and there is a 1 in 10 chance for amounts in excess of 6" in one or two spots leading to flash flooding.

- Breezy to windy conditions developing behind the front will produce multiple hazards this weekend, many of which are expected to linger through much of next week. A Wind Advisory has been issued for the coastal corridors of Volusia and Northern Brevard from 7 PM this evening until 8 PM Sunday evening.

- Fresh to strong winds will also produce dangerous boating conditions, high surf, life-threatening rip currents, and moderate beach erosion through at least the first half of the coming week. Residents and visitors should use caution near the beach and remain out of the water.

DISCUSSION

Issued at 252 PM EDT Sat Oct 17 2026

Rest of Today-Sunday...A cold front currently just south of the I-4 corridor will continue to push through Central Florida today, then stall south of the area Sunday. So far rain along and ahead of the front in East Central Florida has been mostly light stratiform, but some deeper convection has cropped up over the southern counties where the highest rain and storm chances (up to around 80%) today are. The main convective concern continues to be locally heavy rainfall along portions of the Treasure Coast this afternoon into the overnight as low-level winds veer northeasterly, resulting in 30-40 kts of deep sheer while tapping into lingering higher moisture that could support training bands of storms/heavy showers. In fact, nearly stationary training bands have already developed along the Palm Beach County coast, which may lift north. These bands could produce quick rainfall totals of 2-4", and there exists a 1 in 10 chance of amounts in excess of 6", producing flash flooding in one or two spots, especially given how saturated soils are. Recent guidance has trended the highest QPF bulls-eyes a bit more south than previous runs, but still close enough to continue a Slight (level 2 of 4) risk for excessive rainfall from Coastal Martin into the southern portions of coastal St. Lucie Counties. Other storm hazards will be occasional to frequent lightning, and gusty winds to around 45 mph.

Behind the front, north to northeast winds increase as the pressure gradient tightens between the front, deep high pressure moving into the eastern US, and a strong low pressure system developing off the eastern seaboard. Winds speeds pick up to 15-20 mph inland and 20-25 mph along the coast with gusts 30-35 mph southward through the rest of the afternoon and evening. Mesonet were already reporting gusts 30-35 mph along portions of the northern coast early this afternoon. NBM and HREF chances for gusts at or above 35 mph along the Volusia and Northern Brevard coasts are still 60-80%, and a Wind Advisory has been issued in these areas from 7 PM this evening through 8 PM Sunday evening. A little lull is expected Sunday morning, but not long enough for segmenting the advisory. Gusts Sunday afternoon will be close to 35 mph across much of ECFL, and the advisory may need to be extended inland/south.

This fresh to strong northeast flow will produce a number of beach and marine hazards, including rough surf, large breaking waves, and a high risk of life-threatening rip currents at area beaches. Entering the dangerous surf is highly discouraged! Long period onshore swells will also likely contribute to moderate beach erosion through multiple high tide cycles this weekend into early next week. A High Risk for rip currents exists for area beaches the next several days, with a High Surf Advisory going into effect later this evening and continues through the weekend as seas continue to build.

Monday-Friday (Modified Previous Discussion)...A tight pressure gradient continues across the area into next week, as a strong area of high pressure remains situated over the eastern U.S., the strong low meanders off the Mid-Atlantic/Northeast U.S. coast, and the stationary front lingers to the south. This will maintain a breezy to windy N/NE flow for much of the week, continuing rough surf, large breaking waves, a high risk of life-threatening rip currents, and moderate beach erosion at area beaches, as well as hazardous boating conditions in the Atlantic waters through at least early this coming week. Rounds of isolated to scattered onshore moving showers remain in the forecast, with drier conditions generally forecast inland. Temperatures generally remain below normal, with highs in the upper 70s to low 80s and overnight lows in the 60s.

MARINE

Issued at 252 PM EDT Sat Oct 17 2026

Rest of Today-Sunday...Dangerous boating conditions will spread southward across Central Florida and the local Atlantic waters today behind a cold front pushing south. The pressure gradient tightens between the front, which is forecast to stall south of the area Sunday, deep high pressure moving into the eastern US, and a strong low pressure system developing off the Atlantic seaboard, causing N-NE winds to surge to 20-30 kts with occasional to frequent gusts to gale force. Gale Warnings are in effect for the Volusia and Space Coast Atlantic waters for frequent gusts to gale force, with sustained winds approaching gale force in the northern Volusia waters, and Small Craft Advisories are in effect for the Treasure Coast waters where occasional gusts to gale force are possible. Seas build from 3-7 ft this afternoon to 5-11 ft this evening, highest north and offshore, up to 9-14 ft Sunday across the local Atlantic waters, highest in the Gulf Stream. Lightning storms so far this morning and afternoon have stayed well offshore, but isolated to scattered showers and storms will be possible closer to shore in the southern Space and Treasure Coast waters as the front pushes through the rest of this afternoon and evening. Isolated strong storms capable of occasional to frequent cloud to waters lightning, wind gusts over 34 kts, and torrential downpours are possible.

Monday-Wednesday (Modified Previous Discussion)...A tight pressure gradient will continue across the area between strong high pressure to the N/NW, the stalled front south of the area, and strong area of low pressure meandering off the Mid-Atlantic coast. This will maintain a fresh to strong N/NE breeze 20-30 knots and hazardous boating conditions across the waters into the early to middle portion of next week. Large seas up to 10-14 feet continue into Monday, and then only very slowly subside to 7-9 feet into Wednesday.

Rounds of gusty isolated to scattered showers pushing southwest across the waters and onshore will continue into next week.

AVIATION

(00Z TAFs) Issued at 725 PM EDT Sat Oct 17 2026

Lingering VCSH from VRB southward due to the southward-moving cold front. Activity will diminish by 02Z, with mostly dry conditions forecast through the remainder of the period. Breezy and gusty north to northeast winds persist through tonight and into Sunday, with sustained winds of 12-20 knots and gusts up to 30 knots possible. Low chance for onshore-moving showers tomorrow, but confidence is too low to include with the forecast at this time. Anticipate some slackening in the winds beyond 00Z Monday.

PRELIMINARY POINT TEMPS/POPS

DAB 66 76 68 77 / 10 40 40 30 MCO 65 79 67 80 / 10 20 20 10 MLB 70 80 71 81 / 10 40 30 30 VRB 72 82 71 83 / 20 30 30 30 LEE 62 76 64 78 / 0 10 10 10 SFB 65 77 67 79 / 10 30 20 20 ORL 65 78 68 79 / 10 20 20 10 FPR 72 81 71 82 / 30 30 30 20

MLB WATCHES/WARNINGS/ADVISORIES

FL...Wind Advisory until 8 PM EDT Sunday for FLZ141-347-447.

High Surf Advisory from 11 PM this evening to 4 AM EDT Tuesday for FLZ141-154-159-164-347-447-647-747.

AM...Gale Warning until 1 AM EDT Tuesday for AMZ550-570.

Gale Warning until 2 AM EDT Monday for AMZ552-572.

Small Craft Advisory from 2 AM Monday to 1 AM EDT Tuesday for AMZ552-572.

Small Craft Advisory until 1 AM EDT Tuesday for AMZ555-575.