627
FXUS62 KMLB 141857
AFDMLB

Area Forecast Discussion
National Weather Service Melbourne FL
257 PM EDT Fri Aug 14 2026

...New KEY MESSAGES, DISCUSSION, MARINE, CLIMATE...

.KEY MESSAGES...
Issued at 257 PM EDT Fri Aug 14 2026

- Heat Advisory continues through 8PM this evening for heat index
  values exceeding 108F degrees; Remember to practice heat
  safety!

- Impactful heat is expected to continue. Maximum heat index
  values will reach near Heat Advisory criteria (108F+) each day
  through the weekend and into next week; Additional Heat
  Advisories are likely for at least portions of east central
  Florida each day

- Below normal rain chances are forecast this weekend into early
  next week. Drier air aloft due to the Saharan Air Layer will
  support strong and gusty winds in any lightning storms each day

&&

.DISCUSSION...
Issued at 257 PM EDT Fri Aug 14 2026

Current-Tonight... Satellite and KMLB radar imagery show isolated to
scattered showers and storms developing along and ahead of the east
coast sea breeze this afternoon. High-Res guidance has generally
shown the greatest coverage building across the interior from
Osceola northward (~50-60%) late this afternoon and into the
evening. Despite high PWATs analyzed around 2.0", the 15Z XMR
sounding and updated MCO ACARS profiles show a layer of dry air
above 850 mb. While shear remains weak, isolated strong updrafts
which interact with the layer of dry air aloft will be capable of
thunderstorm wind gusts of 35-50 mph and frequent lightning
strikes. Outside of showers and storms, hot conditions continue,
and temperatures will continue to climb through the 90s. A Heat
Advisory remains in effect through 8PM for peak heat index values
exceeding 108 degrees. Shower and storm activity diminishes or
moves west of the local forecast area by 9PM with dry conditions
overnight. Low temperatures fall to range the mid to upper 70s.

Weekend... A 500mb ridge continues to build over the southern U.S.
this weekend while a surface ridge axis remains extended across
central Florida. A thin ribbon of higher moisture lifts from the
southeast on Saturday providing the best chances for scattered
showers and storms across portions of Okeechobee and the interior
Treasure Coast (30-50%), and widely isolated coverage exists
further north (20% or less). The surge of locally higher moisture
will be short lived, followed by a plume of Saharan dry air. This
should keep below seasonal rain chances on Sunday with a 20%
chance of isolated showers and storms across the area. Despite low
rain chances, efficient surface heating should support a few
quick updrafts, and tall storms which interact with dry air aloft
will be capable of localized downburst wind gusts of 35-50 mph.

With little relief from showers and storms for most of the area,
expect a period of impactful heat to continue. High temperatures
climb into the mid to upper 90s each day, and a few daily records
may be within reach across the north interior. Peak heat index
values are forecast to climb near or above 108F, and Heat Advisories
look likely to continue into the weekend. Be sure to practice heat
safety, and never leave children alone in the car. Look before
you lock!

Monday-Thursday... The structure of the 500mb high broadens over the
southern U.S. into next week but should still hold influence over
east central Florida. Surface low pressure is forecast to move
offshore the mid-Atlantic and northeastern seaboard on Monday,
and an associated frontal boundary sags into the southeast U.S.
The front remains north of central Florida, although it should
still increase moisture locally. Low rain chances (20-30%) remain
focused near and north of Orlando and Cape Canaveral on Monday
before a more seasonal pattern of scattered showers and storms
returns areawide into mid week. A period of impactful heat
continues with above normal temperatures in the mid to upper 90s
forecast each day.

&&

.MARINE...
Issued at 257 PM EDT Fri Aug 14 2026

High pressure will promote favorable boating conditions through the
weekend and into next week. South to southwest flow overnight and
early each morning shifts south-southeast as the sea breeze develops
each afternoon, and winds mostly remain 10 kts or less. Seas hold 1-
2 ft, building to 3 ft far offshore early next week. Isolated to
scattered showers and storms are forecast south of the Cape through
late Saturday morning. Drier air will then lead to lower than normal
rain chances late Saturday and into early next week.

&&

.AVIATION...
(18Z TAFs)
Issued at 140 PM EDT Fri Aug 14 2026

The east coast sea breeze has developed and begun pushing land,
shifting light/VRB winds onshore (E-SE) at 5-10 kts behind the
boundary. ISO TS/SH have developed across the area, and are
expected to increase in coverage becoming SCT-NUM INVOF of
KMCO/inland terminals after 21Z as outflow and the sea breezes
collide over the interior. Most TS should dissipate or depart
westward after 23Z, but some activity could linger INVOF of the
inland terminals until around 02Z. Added VCTS to most coastal
terminals, and upgraded inland PROB30 to TEMPOs based on latest
trends and guidance, but overall TS timing remains unchanged.
Quiet and dry overnight, with light/VRB winds. Lower coverage of
TS/SH forecast Saturday. Flow becomes more onshore (ESE-SE),
favoring quickly development/progression of the east coast sea
breeze.

&&

.CLIMATE...
Issued at 257 PM EDT Fri Aug 14 2026

Record high temperatures at local climate sites through this weekend:

Site          Aug 14       Aug 15       Aug 16
Daytona     96  (2010)   97  (2023)   97  (2023)
Leesburg    98  (1991)   96  (1984)   96  (2011)
Sanford     98  (2013)   97  (1999)   97  (2023)
Orlando     98  (2007)   98  (1938)   101 (1918)
Melbourne   97  (2010)   98  (1963)   96  (2022)
Vero Beach  97  (1993)   95  (1993)   96  (2022)
Fort Pierce 96  (1929)   97  (1929)   97  (1948)

&&

.PRELIMINARY POINT TEMPS/POPS...
DAB  76  94  77  94 /   0  20  10  20
MCO  76  97  77  97 /  10  20  20  20
MLB  78  92  78  94 /  10  10   0  20
VRB  76  92  76  93 /   0  20   0  10
LEE  78  96  78  96 /  20  20  20  10
SFB  77  96  78  96 /  10  20  10  30
ORL  77  96  78  96 /  10  20  20  20
FPR  76  92  75  94 /  10  30   0  20

&&

.MLB WATCHES/WARNINGS/ADVISORIES...
FL...Heat Advisory until 8 PM EDT this evening for FLZ041-044>046-053-
     058-141-144-154-159-164-247-254-259-264-347-447-547-647-747.

AM...None.
&&

$$

DISCUSSION...Law
AVIATION...Haley