textproduct: Melbourne

KEY MESSAGES

Issued at 150 AM EDT Thu Jun 11 2026

- A gradual increase in showers and storms is expected each day through the weekend. Excessive rainfall rates within slow-moving storms will be capable of causing flooding in urban and poorly- drained locations. Expect frequent lightning and spotty wind gusts from 40 to 50 mph from the strongest storms.

- Outside of the storms, seasonably high moisture and increasingly hot temperatures are forecast. With Moderate to locally Major HeatRisk over Central Florida, residents and visitors should remain well-hydrated and seek breaks in the shade or A/C if feeling unwell.

- A moderate risk of life-threatening rip currents persists at all Atlantic beaches of Central Florida. Please swim near a lifeguard.

DISCUSSION

Issued at 150 AM EDT Thu Jun 11 2026

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

Early this morning, flat mid-level ridging extends across the southern United States. Above-normal H5 heights are in place over Florida. Shortwave energy and a trough are located over the Northern Plains. In the tropics, an inverted trough is situated from the Yucatan Peninsula to near El Salvador, and deep-layer ridging resides across the Caribbean Sea. Moisture has returned to near-typical June values over the Florida peninsula, with PWATs of 90 to 120% of normal.

There is high confidence in the pattern evolution over the next week or so, and no major weather disturbances appear to be in sight for Florida. Global ensembles place a mid-level ridge over the northern Gulf by this weekend as the inverted trough pivots into the Bay of Campeche. High-latitude blocking forming over the Labrador Sea should cause the shortwave over the northern U.S. to stall once it reaches the northern Great Lakes by Sunday. Ensembles deepen this feature into a longwave trough over the Midwest by Monday or Tuesday. Meanwhile, the Bermuda high is likely to expand over the western subtropical Atlantic early next week, its axis extending westward into the southeastern Gulf.

In response to the upper-air pattern, the surface high pressure axis is expected to slowly sink southward, reaching Central Florida over the next 24 hours. Falling heights over the mid-latitudes will continue to slowly force the near-surface ridge axis to drift toward the Florida Straits by late Sunday. Guidance suggests the surface ridge may begin to lift northward in about a week.

In this regime, sea breeze collisions should begin to favor the eastern half of the peninsula by Friday or Saturday. The corridor of highest PWATs is forecast to stay along a quasi-stationary front just to the north of Florida, but seasonable moisture should remain in place. Throughout the period, 5 kft (H85) temperatures remain near to above normal by 1-2 deg C. Consequently, local impacts will be dictated by oppressive summerlike heat and humidity and scattered convection.

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

Today & Friday...

For this morning, there is a slight chance for a shower or storm to clip the coast generally from Melbourne and points southward.

For the remainder of the work week, we will continue to track sea breeze-driven showers and storms developing in the afternoon and early evening hours. While a few storms should try to form on the Atlantic breeze by early afternoon near or just west of I-95, the collision with the Gulf breeze will need to be watched closely for a few strong storms producing frequent lightning strikes and localized excessive rainfall. Water-loaded downdrafts will have a low chance of producing wind gusts to 40-50 mph.

The WPC Urban Rain Rate Dashboard shows a 10-20% chance of rainfall totals reaching 5-year ARI thresholds, which is enough to cause flooding in poorly drained or populated locations. The collision zone with greatest rainfall potential should lie near or west of Orlando late today, but slightly farther east with higher coverage through Orange, Osceola, and Okeechobee counties on Friday.

High temperatures should range up to 5 degrees above normal, with peak heat indices in the upper 90s to around 104 deg F.

This Weekend - Early Next Week...

With the surface ridge axis heading to our south this weekend, ample moisture and weak offshore flow should continue to promote at least scattered afternoon and evening storms over east central Florida. In a change from recent days, greater rainfall opportunities will also extend to the coast. Beach-goers will need to watch for darkening western skies and seek shelter well ahead of any arriving storms off the mainland.

Weak steering flow, particularly through Sunday, should support localized instances of flooding where storms sit and/or repeat.

A delayed sea breeze will allow temperatures to turn a bit hotter, with widespread low/mid 90s in store. Peak heat indices from 100 to 107 deg F can be anticipated. This adds up to moderate HeatRisk conditions at the very least, and local pockets of Major HeatRisk along the urban I-4 and coastal corridors. This type of heat, while not uncommon in Florida, is significant enough to cause heat-related illness, especially for those with compromised health or lack of access to hydration and/or cooling.

MARINE

Issued at 150 AM EDT Thu Jun 11 2026

High pressure persists over the Western Atlantic this morning, with its axis extending from near Bermuda to the Florida Panhandle. It is forecast to slowly settle southward, reaching South Florida this weekend. Seas will remain favorable for boating, with some daily enhancement to winds behind the sea breeze. A few showers and storms remain possible, with offshore-moving storms becoming more of a hazard by this weekend.

Prevailing seas 2-3 ft through the weekend. Southeasterly winds up to 12 kt each afternoon, turning southwesterly up to around 8 kt at night and early in the morning.

AVIATION

(06Z TAFs) Issued at 150 AM EDT Thu Jun 11 2026

VFR conditions prevail through the period. E/ESE winds increase to near 10 kts by around 15Z along the coast as the sea breeze develops. A typical sea breeze pattern is forecast, with a collision west of ISM/MCO after 20Z. The east coast breeze and the collision will be the focus for convection, with VCTS/TEMPOs included. Convection lingers after 0Z over the interior, but diminishes through around 2Z. Winds then lighten after sunset, becoming light and variable overnight.

PRELIMINARY POINT TEMPS/POPS

DAB 89 74 91 75 / 30 10 30 20 MCO 91 75 92 75 / 50 20 60 40 MLB 88 77 90 76 / 20 10 40 20 VRB 88 75 90 75 / 20 10 40 10 LEE 91 76 93 76 / 50 30 30 30 SFB 92 75 94 76 / 50 20 50 30 ORL 91 75 93 77 / 50 20 50 30 FPR 88 74 89 74 / 20 10 40 20

MLB WATCHES/WARNINGS/ADVISORIES

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