textproduct: Melbourne

KEY MESSAGES

Issued at 117 AM EST Sun Nov 8 2026

- Quiet, seasonable weather continues through the middle of this week. A strong cold front is forecast to reach Central Florida late Thursday or Friday, but only light rainfall is currently expected. The coolest air of the autumn season is increasingly likely next weekend.

- A long-period swell is causing a High Risk of life-threatening rip currents at Atlantic beaches. Please stay out of the ocean.

- Extensive flooding continues along the St. Johns River due to exceptional rainfall in the upper reaches of the basin earlier this week. Heed the advice of local officials. The latest river forecasts are available at water.noaa.gov/wfo/MLB.

DISCUSSION

Issued at 117 AM EST Sun Nov 8 2026

-----------Synoptic Overview-----------

An impressive mid-level shortwave over New England drove a weak cold front through Florida on Saturday. This evening's Cape Canaveral sounding revealed substantial mid-level drying behind the front, with 700-mb relative humidity falling to just 4%. A broad area of high pressure extends from West Virginia to Oklahoma. Winds have turned northwesterly behind the front but will quickly turn onshore as the high remains north of Central Florida over the next couple of days.

The upper-level pattern across CONUS is quasi-zonal with split-flow characteristics. A weak subtropical jet extends from Mexico to N Florida, and the polar jet runs from the Pacific Northwest to the Great Lakes with multiple shortwaves embedded within it. Through early Wednesday, we anticipate little change to this rather progressive, low-amplitude pattern. Total moisture values should average near to just below normal with boundary-layer temps slightly above normal. Overall, this portends high confidence in low impacts for Florida and surrounding areas.

While the overall longwave pattern remains relatively stationary over the next 7-9 days, substantial amplification is favored in the latest ensemble guidance. A series of shortwaves embedded within a 150-200 kt Pacific jet is forecast to deepen the trough over the Eastern Pacific by Wednesday; in response, pronounced downstream ridging should build across the Intermountain West. This configuration, coupled with a developing -NAO blocking pattern over Greenland, will favor the amplification of a deep trough across the Eastern U.S. beginning Thursday.

Cluster analysis of the 07/12Z ensemble suite revealed increasing disagreement with timing and depth of the trough by Friday and Saturday. Before then, there is generally good agreement that a cold front will pass through the state sometime between late Thursday and early Friday. A weak subtropical jet streak may provide additional upper-level support for precipitation along the boundary. However, recent runs have trended somewhat drier. Well north of Florida, a nor'easter may form on the eastern flank of the trough, enhancing northerly winds and cold air advection behind the front.

Guidance slightly favors a more progressive scenario with height rises commencing next Sunday. By that time, continental high pressure should be centered roughly over the Ohio Valley, with winds turning onshore shortly afterward.

-------Sensible Weather & Impacts-------

Today - Wednesday...

This is the tranquil, pleasant stretch of the forecast. Rain chances remain below 20% for much of the period. Near-seasonable temperatures are forecast with intervals of cloud cover mixed with sunshine. Each day, highs will range from 80-85 with lows mainly in the 60s, except some upper 50s north of Orlando.

A lingering easterly long-period swell persists in the Atlantic, so the high risk of life-threatening rip currents will continue through at least Monday. Additionally, minor coastal flooding is possible mainly near and south of St. Lucie Inlet during the morning high tide cycles through early this week.

Thursday - Next Weekend...

Clouds should increase Thursday as a stream of moisture precedes an approaching cold front. Thursday's highs in the upper 70s to near 80 will be the warmest of this period. By Thursday night, the cold front is expected to enter Central Florida before quickly passing south of here on Friday. Rainfall potential has trended downward. Nearly 75% of grand ensemble members produce little to no rainfall, or only light, scattered showers along the front.

Any lingering showers on Friday should exit the area as much drier and cooler air drifts over the state as the weekend arrives. Highs are forecast to range from the upper 60s to mid 70s as we end the work week. The coolest day appears to be Saturday, when much of the area is forecast to only reach the mid/upper 60s. Sunday looks a touch warmer, in the upper 60s to mid 70s.

While substantial uncertainty remains regarding the amplitude and progression of the upper-level trough, confidence is increasing that the coolest temperatures of the autumn season will arrive next weekend. On the coolest morning (next Sunday), we are forecasting mid to upper 40s over much of the interior, with low/mid 50s along the coast. Our cooler scenario (10% chance of occurrence) has trended slightly colder for next Sunday, ranging from the low to mid 40s over the interior to the upper 40s and low 50s along the coast. Accounting for wind chill, there is a 10-30% chance of apparent temperatures in the upper 30s both next Saturday and Sunday mornings roughly from Orlando and points northward.

MARINE

Issued at 117 AM EST Sun Nov 8 2026

A sprawling area of high pressure will hold nearly stationary over the Mid-South through early this week before dropping toward Florida by Wednesday. Tranquil conditions are expected, but a lingering long-period easterly swell will cause occasionally poor boating conditions, especially near inlets and offshore. Low pressure is forecast to develop and move toward the Mid-Atlantic by late Thursday, dragging a strong cold front toward the area by Thursday night or early Friday.

Light winds becoming NE 5-12 kt each afternoon today and Monday. Winds then become light on Tuesday and Wednesday. Seas 3-4 ft nearshore but up to 6 ft offshore north of Sebastian Inlet through Tuesday. Seas decrease to 2-4 ft all areas by Wednesday and Thursday.

AVIATION

(18Z TAFs) Issued at 1227 PM EST Sun Nov 8 2026

Chances for BR/FG at KLEE and INVOF KMCO/I-4 terminals late tonight into early Monday morning have increased a bit. REFS is up to 50-60%, and HRRR is indicating IFR-LIFR reductions, but the rest of the guidance remains 20% or less for MVFR-IFR. For this package introduced some VCFG/BCFG and FEW-SCT 004-006 at terminals along/north of I-4, and will continue to monitor trends. Otherwise, dry VFR conditions forecast through the TAF period. Winds NNW-NE 5-10 kts this afternoon, closer to NE at 10 kts along the coast from a weak sea breeze, become light/VRB overnight, then return to NNW- NW 5-10 kts Monday afternoon.

HYDROLOGY

Issued at 117 AM EST Sun Nov 8 2026

River flood warnings remain in effect for all St. Johns River forecast points (Cocoa, Geneva, Sanford, Deland and Astor). River levels are forecast to continue to slowly rise over the next several days through Minor and in some cases Moderate Flood stage. The river at Cocoa (COCF1) is forecast to reach Major flood stage either today or Monday with Geneva (GENF1) approaching Major flood stage towards the middle of the week. River forecasts out five days are issued twice daily by the NWS Southeast River Forecast Center in collaboration with NWS Melbourne and are available online at water.noaa.gov/wfo/MLB.

PRELIMINARY POINT TEMPS/POPS

DAB 62 81 63 82 / 0 0 0 0 MCO 63 83 64 83 / 0 0 0 0 MLB 66 82 68 82 / 0 0 0 10 VRB 66 83 67 83 / 0 0 0 0 LEE 61 83 62 83 / 0 0 0 0 SFB 62 84 63 84 / 0 0 0 0 ORL 63 83 64 83 / 0 0 0 0 FPR 65 82 66 82 / 0 0 0 0

MLB WATCHES/WARNINGS/ADVISORIES

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