weather.gov     
National Weather Service

Watches, Warnings & Advisories
NWS Homepage

One product issued by NWS for: Sebastian Inlet FL
Share |


Hazardous Weather Outlook

Hazardous Weather Outlook
National Weather Service Melbourne FL
1127 AM EDT Mon Sep 20 2021

AMZ550-552-555-570-572-575-FLZ041-044>047-053-054-058-059-064-141-
144-147-210400-
Flagler Beach to Volusia-Brevard County Line 0-20 nm-Volusia-
Brevard County Line to Sebastian Inlet 0-20 nm-
Sebastian Inlet to Jupiter Inlet 0-20 nm-Flagler Beach to Volusia-
Brevard County Line 20-60 nm-Volusia-
Brevard County Line to Sebastian Inlet 20-60 nm-
Sebastian Inlet to Jupiter Inlet 20-60 nm-Inland Volusia-
Northern Lake-Orange-Seminole-Southern Brevard-Osceola-
Indian River-Okeechobee-St. Lucie-Martin-Coastal Volusia-
Southern Lake-Northern Brevard-
1127 AM EDT Mon Sep 20 2021

THIS HAZARDOUS WEATHER OUTLOOK IS FOR EAST CENTRAL FLORIDA.

.DAY ONE...THIS AFTERNOON AND TONIGHT.

.THUNDERSTORM IMPACT...
Numerous-to-widespread showers and lighting storms are forecast
to develop across east-central Florida once again this afternoon
as the sea breeze boundaries develop and move inland. The best
chance for storms is forecast north of the Treasure Coast between
I-4 and I-95 late this afternoon through early this evening as sea
breeze and outflow boundary collisions occur. Storm motion will
be slow and erratic with a general east to southeasterly movement
at 5 to 10 mph. Primary storm hazards will be flooding, heavy
rainfall, frequent cloud-to-ground lightning strikes, and wind
gusts up to 40 mph. Move indoors to safety at the first sign of
threatening skies or if you hear thunder.

.FLOOD IMPACT...
Slow moving storms will have the potential to produce torrential
rainfall totals of 2 to 4 inches with isolated higher amounts
possible in some locations. Locations that have received persistent
heavy rainfall over the last several days will have to an
increased sensitivity to flooding today. Northeastern Lake,
western Volusia, Orange, Seminole, and northern Osceola counties
will be at most risk for flooding during periods of heavy rainfall
today. This will produce considerable ponding of water on
roadways and other poorly drained urban and low-lying areas. Never
drive through water of unknown depth, as the water may be too
deep to allow your vehicle to cross safely.

.MARINE THUNDERSTORM GUST IMPACT...
A few stronger storms may be capable of wind gusts near 35 knots
over inland lakes and the Intracoastal and near shore Atlantic
waters. Mariners should watch for storms mainly approaching from
the west today. However, storm motion will mostly be slow and
erratic.

.WATERSPOUT IMPACT...
The combination of very moist air and light winds may lead to a
brief isolated waterspout over the Atlantic waters, in addition
to, along and near the Intracoastal Waterway, and larger inland
lakes. If you see a funnel cloud or waterspout start to develop,
give it a wide berth, and, if possible contact the National
Weather Service in Melbourne.

.RIVER FLOOD IMPACT...
Repeated rounds of heavy diurnal rainfall over the past week has
caused water levels along the Saint Johns River to rise, especially
at Astor and near Geneva. The river at Astor is forecast to crest at
Minor Flood Stage between Monday and Wednesday and reach Action
Stage near Geneva on Wednesday, cresting by next weekend.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY.
Storm coverage will remain above normal as deep moisture remains
in place over the local area. Flooding, torrential downpours,
cloud-to-ground lightning strikes, and gusty winds will be the
main storm threats.

The risk of dangerous rip currents is expected to be moderate
through mid work week.

.SPOTTER INFORMATION STATEMENT...
Spotter activation will not be needed this afternoon and tonight,
however, spotters are encouraged to report any rainfall amounts
greater than three inches and any observed flooding issues from
heavy rainfall.

$$

Watson



U.S. Dept. of Commerce
NOAA National Weather Service
1325 East West Highway
Silver Spring, MD 20910
E-mail: w-nws.webmaster@noaa.gov
Page last modified: May 16, 2007
NATIONAL WEATHER SERVICE: for Safety, for Work, for Fun - FOR LIFE