Special Marine Warning 21, NWS Melbourne, FL

526 
FZUS72 KMLB 201603
MWSMLB

Marine Weather Statement
National Weather Service Melbourne FL
1203 PM EDT Mon Apr 20 2020

AMZ550-570-201745-
/O.CON.KMLB.MA.W.0021.000000T0000Z-200420T1745Z/
1203 PM EDT Mon Apr 20 2020

...A SPECIAL MARINE WARNING REMAINS IN EFFECT UNTIL 145 PM EDT...

For the following areas...
Flagler Beach to Volusia-Brevard County Line 0-20 nm...
Flagler Beach to Volusia-Brevard County Line 20-60 nm...

At 1203 PM EDT, a severe thunderstorm likely producing waterspouts 
was located 7 nm northeast of Apollo Beach, or 10 nm northeast of 
Oak Hill, moving east at 35 knots.

HAZARD...Waterspouts, wind gusts in excess of 50 knots, and large 
         hail.

SOURCE...Radar indicated.

IMPACT...Waterspouts can can quickly form and capsize boats, damage 
         vessels and create locally hazardous seas. Make sure all on 
         board are wearing life jackets. Expect wind gusts in excess 
         of 50 knots and suddenly higher waves. Boats could sustain 
         significant damage or capsize. Make sure all on board are 
         wearing life jackets. Return to safe harbor if possible.

Locations impacted include...
Apollo Beach, Eldora, Turtle Mound and Bethune Beach. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Thunderstorms can produce sudden waterspouts. Waterspouts can easily
overturn boats and create locally hazardous seas. Seek safe harbor
immediately.

&&

LAT...LON 2942 8113 2943 8110 2946 8113 2948 8072
      2947 7998 2916 7975 2893 7964 2882 8075
      2879 8074 2879 8075 2882 8076 2882 8081
      2879 8079 2880 8085 2877 8089 2881 8089
      2884 8085 2938 8113
TIME...MOT...LOC 1603Z 266DEG 33KT 2898 8069 

WATERSPOUT...POSSIBLE
HAIL...>.75IN
WIND...50KTS

$$

Sedlock

023 
FZUS72 KMLB 201637
MWSMLB

Marine Weather Statement
National Weather Service Melbourne FL
1237 PM EDT Mon Apr 20 2020

AMZ550-570-201647-
/O.CAN.KMLB.MA.W.0021.000000T0000Z-200420T1745Z/
1237 PM EDT Mon Apr 20 2020

...THE SPECIAL MARINE WARNING IS CANCELLED...

The affected areas were... 
Flagler Beach to Volusia-Brevard County Line 0-20 nm...
Flagler Beach to Volusia-Brevard County Line 20-60 nm...

The thunderstorm has moved south and out of the area and no longer 
poses a significant threat to boaters.

A Severe Thunderstorm Watch remains in effect until 300 PM EDT for
east central Florida...and the adjacent coastal waters.

LAT...LON 2942 8113 2943 8110 2946 8113 2948 8072
      2947 7998 2916 7975 2893 7964 2882 8075
      2879 8074 2879 8075 2882 8076 2882 8081
      2879 8079 2880 8085 2877 8089 2881 8089
      2884 8085 2938 8113
TIME...MOT...LOC 1635Z 270DEG 46KT 2898 8019 

$$

KN

East Central Florida Forecast Discussion
National Weather Service Melbourne FL
904 AM EDT Mon Apr 20 2020

.DISCUSSION...

...Severe Thunderstorm Watch for Most of Central Florida Until 3
PM...

Today...Stronger storms are poised to enter the forecast area from
the north and west over the next couple hours. Isolated severe
storms could develop, with locally damaging winds and hail possible,
along with an isolated tornado. Windy ahead of the front with a
period of time for surface heating creating some additional
instability into the afternoon.

By late morning to early afternoon rain chances increase all the way
down to the Space Coast as the main frontal boundary moves into our
area. Scattered to numerous showers possible with embedded
stronger lightning storms.

Abundant moisture with dew points in the upper 60s/low 70s and very
strong diurnal heating contribute to MLCAPE values up to 2000 J/kg.
Hodographs are mostly mostly unidirectional and straight-lined. The
biggest question mark is going to be forcing for convective
initiation as the main upper trough departs the area and the front
flattens out/weakens and slows once it reaches the I-4 corridor.

Environmental conditions are favorable for isolated severe storms,
with the main threat of damaging wind gusts, hail up to quarter
size, and deadly lightning strikes. The threat is greatest in
the watch area, from Brevard/Osceola Counties north.

A Lake Wind Advisory is in place for sustained southwest winds 20-25
mph with gusts up to 35mph into late afternoon. This also drives up
afternoon temperatures to record values in some areas.

Tonight...As previously mentioned, model guidance shows the
weakening frontal boundary slowing down between the Cape and
Treasure Coast. Scattered showers and isolated lightning storms
linger into the evening hours. Though, there is considerable
uncertainty regarding how many storms will actually materialize
due to weak convergence along the front. As the front sags south
through the overnight, isolated to scattered showers possible from
Sebastian south. Again, there is high uncertainty with this
forecast as rain chances could be much less if front fizzles by
late evening. Winds decrease to 5-10mph after sunset and veer
west/northwest. Overnight lows in the low/mid 60s, except upper
60s in Martin County.

&&

.AVIATION...
Windy today, sustained southwest winds 20 knots and gusts up to 30
knots possible through the afternoon. A cold front moves in this
morning, bringing showers and some strong lightning storms. Highest
confidence in storm impacts at KDAB/KMCO/KSFB/KISM, with possible
early afternoon storms approaching KTIX/KMLB but confidence is lower.

&&

.MARINE...
Today...Hazardous boating conditions today as a cold front
approaches the area, increasing the pressure gradient over all east
central Florida waters. This results in southwest winds 20-25 knots
with higher gusts. Seas 3-5 feet nearshore and 5-6 feet offshore.
A Small Craft Advisory remains in effect for all waters through 8
PM tonight. A few strong to severe storms possible from late
morning into the early afternoon. Main threats will be wind gusts
in excess of 40 knots, hail, and dangerous lightning strikes.

Tonight...The cold front weakens as it moves south of the Cape this
evening, winds diminish to 15-20 knots and seas drop to 3-4 feet
nearshore and 4-6 feet offshore. Small craft still need to exercise
caution tonight. Scattered showers and lingering lightning storms
possible from Sebastian Inlet south.

&&

.CLIMATE...
Record highs for April 20th at a few sites.

                    RECORD
            DATE     HIGH
Melbourne   20-APR  91 1944
Vero Beach  20-APR  90 1968
Fort Pierce 20-APR  92 1968

&&

.MLB WATCHES/WARNINGS/ADVISORIES...
FL...Severe thunderstorm watch for Coastal
     Volusia-Inland Volusia-Northern Brevard-
     Northern Lake-Orange-Osceola-Seminole-Southern
     Brevard-Southern Lake-until 3 PM EDT.

     Lake Wind Advisory until 8 PM EDT this evening for Coastal
     Volusia-Indian River-Inland Volusia-Martin-Northern Brevard-
     Northern Lake-Okeechobee-Orange-Osceola-Seminole-Southern
     Brevard-Southern Lake-St. Lucie.

AM...Severe thunderstorm watch Flagler
     Beach to Volusia-Brevard County Line 0-20 nm-Volusia-Brevard
     County Line to Sebastian Inlet 0-20 nm-until 3 PM EDT.
     Small Craft Advisory until 8 PM EDT this evening for Flagler
     Beach to Volusia-Brevard County Line 0-20 nm-Flagler Beach
     to Volusia-Brevard County Line 20-60 nm-Sebastian Inlet to
     Jupiter Inlet 0-20 nm-Sebastian Inlet to Jupiter Inlet 20-
     60 nm-Volusia-Brevard County Line to Sebastian Inlet 0-20
     nm-Volusia-Brevard County Line to Sebastian Inlet 20-60 nm.

&&

JP/TES/KN/MW

Hazardous Weather Outlook
National Weather Service Melbourne FL
732 AM EDT Mon Apr 20 2020

AMZ550-552-555-570-572-575-FLZ041-044>047-053-054-058-059-064-141-
144-147-202200-
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-
732 AM EDT Mon Apr 20 2020

THIS HAZARDOUS WEATHER OUTLOOK IS FOR EAST CENTRAL FLORIDA.

.DAY ONE...TODAY AND TONIGHT.
...SEVERE THUNDERSTORM WATCH FOR MOST OF CENTRAL FLORIDA THROUGH
3 PM...

.THUNDERSTORM IMPACT...
Numerous fast moving showers and strong lightning storms will move
eastward across east central Florida. Deadly lightning strikes
and potentially damaging wind gusts, along with a brief tornado
will be a threat within any strong to possibly severe storms
which may develop. Damaging winds up to 60 mph, and hail up to
quarter size. A brief tornado is possible within any cell which
may acquire rotation. The greatest risk for any severe storms will
be from Brevard and Osceola counties northward.

.FLOOD IMPACT...
Locally heavy rainfall of a half to one inch will be possible in
a brief period, leading to some nuisance flooding of low spots and
roadways.

.RIP CURRENT IMPACT...
There is a moderate risk of rip currents at all east central
Florida beaches today, mainly due to an increasing short period
swell. While dangerous rip currents will be present all day, the
risk will be greatest from 10 AM to 4 PM due to tidal effects.
Swim only within sight of a lifeguard. If no lifeguard is present,
don't enter the surf. Be aware that beach closures remain in
effect for some communities.

.MARINE THUNDERSTORM GUST IMPACT...
Scattered strong lightning storms will push offshore during the
day. As these storms cross the coast and nearshore waters most
will be capable of wind gusts in excess of 35 knots. If a severe
storm develops, there is a chance of wind gusts up to 50 knots.

.WATERSPOUT IMPACT...
A brief waterspout is possible within any cell which may acquire
rotation.

.WIND AND SEA IMPACT...
Southwest winds up to 20 knots over the nearshore waters, and 20
to 25 knots with higher gusts over the offshore waters. A Small
Craft Advisory is in effect for all local waters through 8 PM.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY.
Drier weather is expected during mid week before a chance for
storms returns late in the week. A Moderate risk of rip currents
is expected at all east central Florida beaches through mid week.

.SPOTTER INFORMATION STATEMENT...
Spotter activation may be needed. Please relay any information about
severe weather to the NWS while following all local, state, and CDC
guidelines.

KR/JP

Special Weather Statement
National Weather Service Melbourne FL
941 AM EDT Mon Apr 20 2020

FLZ041-044-141-201445-
Northern Lake County FL-Coastal Volusia FL-Inland Volusia FL-
941 AM EDT Mon Apr 20 2020

...SIGNIFICANT WEATHER ADVISORY FOR CENTRAL AND NORTH LAKE AND
VOLUSIA COUNTIES UNTIL 1045 AM EDT...

At 939 AM EDT, Doppler radar was tracking a strong
cluster of thunderstorms near Lynne, moving northeast at 60 mph.

Nickel size hail and wind gusts of 50 to 55 mph will be possible with
these storms.

Locations impacted include...
Deltona, Lake George, Deland, Daytona Beach, Port Orange, and Ormond
Beach.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Frequent cloud to ground lightning is occurring with these storms.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

These storms may intensify, so be certain to monitor local radio
stations and available television stations for additional
information and possible warnings from the National Weather Service.

&&

A Severe Thunderstorm Watch remains in effect until 300 PM EDT for
east central Florida.

LAT...LON 2943 8107 2910 8093 2885 8136 2887 8135
      2888 8136 2882 8142 2878 8195 2896 8195
      2896 8166 2905 8166 2906 8164 2928 8164
      2932 8168 2938 8145 2940 8142 2926 8142
      2927 8115 2941 8116
TIME...MOT...LOC 1339Z 246DEG 63KT 2915 8196

Sedlock

Special Weather Statement
National Weather Service Melbourne FL
1032 AM EDT Mon Apr 20 2020

FLZ041-044>046-144-201515-
Northern Lake County FL-Orange FL-Seminole FL-Inland Volusia FL-
Southern Lake County FL-
1032 AM EDT Mon Apr 20 2020

...SIGNIFICANT WEATHER ADVISORY FOR WESTERN SEMINOLE...CENTRAL AND
SOUTHERN LAKE...NORTHWESTERN ORANGE AND SOUTH CENTRAL VOLUSIA
COUNTIES UNTIL 1115 AM EDT...

At 1032 AM EDT, Doppler radar was tracking a strong thunderstorm near
Leesburg, moving east at 40 mph.

Pea size hail and wind gusts of 50 to 55 mph will be possible with
this storm.

Locations impacted include...
Orlando, Sanford, Apopka, Altamonte Springs and Ocoee.

A Severe Thunderstorm Watch remains in effect until 300 PM EDT for
east central Florida.

LAT...LON 2886 8195 2899 8132 2856 8129 2857 8195
TIME...MOT...LOC 1432Z 269DEG 34KT 2879 8196

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