textproduct: Melbourne

KEY MESSAGES

Issued at 152 AM EDT Sat Aug 1 2026

- Additional rounds of showers and storms are forecast through the weekend. Storms may form earlier in the day than usual. Frequent lightning and gusty winds to 40-50 mph will be the primary hazards.

- Later today, there is a 5-10% chance of rainfall exceeding 3 inches in less than 2 hours. This may lead to localized flooding of urban and poorly drained areas.

- High pressure expands over Florida early next week. However, continued high moisture and sea breeze interactions should keep storm chances elevated, especially over the interior and Lake Okeechobee region.

DISCUSSION

Issued at 152 AM EDT Sat Aug 1 2026

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

Early this morning, water vapor imagery reveals a rather complex upper-air pattern across the U.S. for the first day of August. A pair of shortwaves is keeping a broad dip in the jet stream over the Eastern U.S. The stronger of these two features is currently located near the Quad Cities. Exceptionally stout ridging extends from the Caribbean to the Desert Southwest, where 01/00Z RAOBs returned H5 heights of 601 dam at Flagstaff, AZ and 600 dam at El Paso, TX. Locally, H5 heights exceed 590 dam; warm mid-level temperatures are resulting in poor H7-H5 lapse rates, which is rather typical for the time of year.

The energy approaching the Mississippi Valley will soon carve out a longwave trough; it will then move little through Sunday. A weak quasi-stationary front should remain well north of Central Florida. Mean southwesterly flow in the boundary layer maintains rich moisture over the state with PWAT values from 100-130% of normal through at least Monday. Amid subtle height falls, weak vorticity maxima are forecast to rotate around the trough west of Florida, providing forcing for occasional convection.

By Monday, the Bermuda High will attempt to retrograde over the W Atlantic, promoting height rises over Florida. As ensemble members weaken the trough over the Tennessee Valley by Tuesday, the near-surface ridge axis is likely to trek north of our latitude by midweek, providing light onshore flow off the Atlantic.

Confidence trails off late in the work week and toward next weekend. The 31/12Z grand ensemble and fellow AI members initialized an easterly wave over the Canary Islands. The model suite sends this disturbance westward across the Atlantic, perhaps approaching Florida by late Thursday or Friday. PWAT anomalies clearly show an increase in moisture associated with this feature, but we expect further refinements to the forecast as this disturbance is currently 3800 miles to our east.

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

This Weekend...

Periods of active weather should be expected. Those planning to be outdoors will need to listen for thunder, watch for darkening skies, and find safe shelter when storms threaten!

Nocturnal showers and storms extending along the FL Panhandle early this morning suggest a weak disturbance is present. If this is the case, an earlier-than-normal start to showers and storms is on the table for today, perhaps as early as late morning/midday near and northwest of Interstate 4. Relatively weak offshore winds may allow a sea breeze to form and hug the coast. Boundary interactions would support numerous storms near and east of I-95 in the afternoon. Wind gusts to 40-45 mph and frequent lightning will be the primary hazards. There is a 5-10% chance of rainfall totals exceeding 3", especially along the coast. Localized urban flooding is possible where this rainfall occurs over poorly drained areas.

Boundary-layer flow increases from Saturday night into Sunday. Additional weak energy approaching N FL is likely to spark overnight showers and storms northwest of our area, and some of this may reach Lake County overnight. This portends another early start to shower and storm chances on Sunday, especially over our northern half. Then, daytime heating will provide an additional spark for storm development over the eastern half of the peninsula. While shear is weak, the enhanced mid-level flow (20-25 kts) will be sufficient for a few stronger storms with wind gusts from 50 to 55 mph. There is a very small chance for a severe gust to around 60 mph.

Hot and muggy conditions continue, with highs in the low/mid 90s and heat indices from 100 to 107. Of the two days, today looks slightly hotter.

Monday - Tuesday...

This still appears to be a transition period for local weather conditions. High pressure will begin to push overhead, weakening background flow just a bit. As that occurs, the sea breeze will begin to move inland each afternoon, with better progression especially by Tuesday. Near- to above-normal moisture values will continue to support scattered to numerous showers and storms (50% to 80%) each day. Seasonably hot temperatures will persist as well, outside of the storms.

Wednesday - next Saturday...

On Wednesday and Thursday, light onshore flow should finally return, giving us more typical summertime conditions. As the sea breeze pushes inland, a few storms may try to form closer to the coast before concentrating over the interior and points westward.

By Friday and Saturday, the easterly wave mentioned in the overview may reach the state. Should this happen, it would provide increased moisture and an uptick in shower/storm opportunities late in the week. While a few deterministic runs have recently shown tropical development with this feature, the GEFS and EPS ensembles are generally unimpressed and favor an open wave/trough as it passes into the W Atlantic. The National Hurricane Center is not expecting tropical cyclone formation over the next 7 days.

Continued hot and muggy with highs near normal in the low/mid 90s.

MARINE

Issued at 152 AM EDT Sat Aug 1 2026

High pressure remains situated south of the local Atlantic this weekend. A nearly-stationary front will stay to the north. Weak to moderate offshore flow persists, but as the sea breeze attempts to form, winds may turn southeasterly in the afternoon near the coast, especially south of Cape Canaveral. Scattered to numerous offshore-moving storms remain the primary hazard for boaters this weekend. Winds freshen some on Sunday, especially in the Gulf Stream. Next week, high pressure will lift slowly northward, with onshore breezes returning by midweek.

SW to S winds up to 12 kt today, increasing to 12-18 kt on Sunday. Winds slowly turn out of the SE early next week, up to 12 kt. Seas of 1-2 ft nearshore, except locally 3 ft off of Volusia County on Sunday. Seas reach 3-4 ft in the Gulf Stream north of Cape Canaveral on Sunday and early Monday.

AVIATION

(06Z TAFs) Issued at 152 AM EDT Sat Aug 1 2026

Mainly quiet through sunrise but isold pop-up SHRA may approach LEE. W/SW flow will continue Sat but slightly weaker than Fri and this may allow the east coast sea breeze to more fully form but inland progress will be slow as it fights the offshore flow. Should see another early start to SHRA/TSRA Sat morning over western FL, spreading east. Have inserted TEMPOs starting at LEE (17Z), then MCO/SFB/DAB at 18Z but initiation could be a bit sooner. With a better chance of a sea breeze south of the Cape, also added TEMPO TS conds for MLB-SUA starting at 19Z-20Z. Gusty winds around 35 knots will accompany the stronger storms.

PRELIMINARY POINT TEMPS/POPS

DAB 91 75 88 74 / 80 20 80 20 MCO 92 75 89 75 / 60 30 70 10 MLB 91 75 90 75 / 70 20 60 10 VRB 91 73 91 74 / 70 30 60 10 LEE 89 75 86 75 / 70 50 80 30 SFB 92 76 89 75 / 80 30 70 10 ORL 92 76 89 75 / 70 30 70 10 FPR 91 73 90 74 / 60 30 70 10

MLB WATCHES/WARNINGS/ADVISORIES

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