Severe Thunderstorm Watch 91

Issued

Apr 11, 2021, 8:15 AM EDT (12:15 UTC)

Expired

Apr 11, 2021, 4:00 PM EDT

In force

8 hr

Issued by

the Storm Prediction Center

Largest hail expected

1.5 in

Strongest gust expected

65 kt

The Melbourne radar (KMLB), 124 km from the middle of the area, began a volume at 12:15 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

Two or more tornadoes

20%

One or more EF2 to EF5 tornadoes

2%

Ten or more severe wind reports

60%

One or more gusts of 65 knots or more

30%

Ten or more severe hail reports

20%

One or more hailstones of 2 inches or more

10%

Six or more combined severe hail and wind reports

90%

• Mesoscale Discussion 365 Severe potential...watch possibleApr 11, 5:27 AM EDT
• Mesoscale Discussion 366 Severe thunderstorm watch 91Apr 11, 10:54 AM EDT
• Mesoscale Discussion 367 Severe thunderstorm watch 91Apr 11, 12:08 PM EDT
• Mesoscale Discussion 368 Severe thunderstorm watch 91Apr 11, 1:24 PM EDT

922 
WWUS20 KWNS 111212
SEL1  
SPC WW 111212
FLZ000-CWZ000-112000-

URGENT - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 91
NWS Storm Prediction Center Norman OK
810 AM EDT Sun Apr 11 2021

The NWS Storm Prediction Center has issued a

* Severe Thunderstorm Watch for portions of 
  Northern and central Florida
  Coastal Waters

* Effective this Sunday morning and afternoon from 810 AM until
  400 PM EDT.

* Primary threats include...
  Scattered damaging winds likely with isolated significant gusts
    to 75 mph possible
  Isolated large hail events to 1.5 inches in diameter possible
  A tornado or two possible

SUMMARY...A severe thunderstorm cluster is expected to organize over
the next few hours from activity initially over the northeastern
Gulf.  The resulting storm complex then should accelerate eastward
and southeastward down the peninsula today.  Isolated severe hail
and strong/damaging gusts also may occur from thunderstorms ahead of
the main complex.  Severe gusts will be the main threat, with
isolated large hail and a tornado also possible.

The severe thunderstorm watch area is approximately along and 80
statute miles east and west of a line from 10 miles west northwest
of Gainesville FL to 30 miles south of Avon Park FL. For a complete
depiction of the watch see the associated watch outline update
(WOUS64 KWNS WOU1).

PRECAUTIONARY/PREPAREDNESS ACTIONS...

REMEMBER...A Severe Thunderstorm Watch means conditions are
favorable for severe thunderstorms in and close to the watch area.
Persons in these areas should be on the lookout for threatening
weather conditions and listen for later statements and possible
warnings. Severe thunderstorms can and occasionally do produce
tornadoes.

&&

AVIATION...A few severe thunderstorms with hail surface and aloft to
1.5 inches. Extreme turbulence and surface wind gusts to 65 knots. A
few cumulonimbi with maximum tops to 550. Mean storm motion vector
30040.

...Edwards

Severe Thunderstorm Watches in Florida, 2021Every severe thunderstorm watch in 2021

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.