Alert archive / Florida / Severe Thunderstorm Warnings in 2026

Severe Thunderstorm Warning 87, NWS Melbourne, FL

July 17, 2026Saint Lucie County, Florida

NWS Melbourne, FL issued this severe thunderstorm warning at Jul 17, 2026, 6:19 PM EDT for Saint Lucie County, Florida. It was in force for 15 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Jul 17, 2026, 6:19 PM EDT (22:19 UTC)
Expired
Jul 17, 2026, 6:34 PM EDT
In force
15 min
Issued by
NWS Melbourne, FL
Area
Storm-based polygon
Hail
0.75 in
Wind
60.0 mph

County Saint Lucie County, FL

The radar

The Melbourne radar (KMLB), 78 km from the middle of the area, began a volume at 22:22 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.

Did it verify

Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this severe thunderstorm warning while it was in force. That is not proof nothing happened: reports are thin where few people live.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

The nearest sounding before it

Miami, FL (KMFL), launched 12:00Z, 10.3 hours before the alert went out and 183 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-pSkew-T log-p diagram, Miami, FL at 12:00Z on 2026-07-17Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2437 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Miami, FL at 12:00Z on 2026-07-17The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 7 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
2437 J/kg
Mixed-layer CIN
-14 J/kg
Mixed-layer LCL
856 m above ground
0-6 km bulk shear
3 kt
0-1 km storm-relative helicity
7 m²/s²
0-3 km storm-relative helicity
1 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

681 
WUUS52 KMLB 172219
SVRMLB
FLC111-172245-
/O.NEW.KMLB.SV.W.0087.260717T2219Z-260717T2245Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Melbourne FL
619 PM EDT Fri Jul 17 2026

The National Weather Service in Melbourne has issued a

* Severe Thunderstorm Warning for...
  North central St. Lucie County in east central Florida...

* Until 645 PM EDT.

* At 618 PM EDT, a severe thunderstorm was located over Saint Lucie
  Airport, or over Indrio, moving south at 5 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

  IMPACT...Expect damage to roofs, siding, and trees.

* Locations impacted include...
  Fort Pierce, Indrio, Saint Lucie Village, Fort Pierce North, and
  Saint Lucie Airport.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

Frequent cloud to ground lightning is also occurring with this storm.
Move indoors immediately. Remember, lightning can strike beyond 10
miles away from a thunderstorm.

Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 2741 8031 2741 8045 2753 8045 2754 8035
TIME...MOT...LOC 2218Z 341DEG 6KT 2750 8037 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Law
1 follow-up statement
952 
WWUS52 KMLB 172234
SVSMLB

Severe Weather Statement
National Weather Service Melbourne FL
634 PM EDT Fri Jul 17 2026

FLC111-172243-
/O.CAN.KMLB.SV.W.0087.000000T0000Z-260717T2245Z/
St. Lucie FL-
634 PM EDT Fri Jul 17 2026

...THE SEVERE THUNDERSTORM WARNING FOR NORTH CENTRAL ST. LUCIE COUNTY
IS CANCELLED...

The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning has been cancelled. However gusty winds are 
still possible with this thunderstorm.

LAT...LON 2741 8031 2741 8045 2753 8045 2754 8035
TIME...MOT...LOC 2233Z 341DEG 6KT 2748 8036 

$$

Law

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Melbourne, FL wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 17, 2:37 PM EDT, 3 hours 42 minutes earlier. Its key messages:

  • Issued at 237 PM EDT Fri Jul 17 2026
  • An active weather pattern is forecast through the remainder of this week and into the next, with scattered to numerous showers and lightning storms anticipated through at least Monday.
  • Storm hazards will include lightning strikes, gusty to locally damaging wind gusts, and heavy downpours. Minor, localized flooding will also be possible in some locations.
  • Near to slightly above normal temperatures are forecast through next week, with peak heat indices exceeding 100F areawide. Practice heat safety if spending extended periods of time outdoors!
  • At the beaches, a Moderate risk of life-threatening rip currents continues. Always swim near a lifeguard and never enter the surf alone!
Area forecast discussion, Jul 17, 2:37 PM EDT, 3 hours 42 minutes before
Area Forecast Discussion
National Weather Service Melbourne FL
237 PM EDT Fri Jul 17 2026

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

.KEY MESSAGES...
Issued at 237 PM EDT Fri Jul 17 2026

- An active weather pattern is forecast through the remainder of
  this week and into the next, with scattered to numerous showers
  and lightning storms anticipated through at least Monday.

- Storm hazards will include lightning strikes, gusty to locally
  damaging wind gusts, and heavy downpours. Minor, localized
  flooding will also be possible in some locations.

- Near to slightly above normal temperatures are forecast through
  next week, with peak heat indices exceeding 100F areawide.
  Practice heat safety if spending extended periods of time
  outdoors!

- At the beaches, a Moderate risk of life-threatening rip currents
  continues. Always swim near a lifeguard and never enter the
  surf alone!

&&

.DISCUSSION...
Issued at 237 PM EDT Fri Jul 17 2026

Current-Tonight...Temperatures will soar into the L-M90s this
afternoon ahead of sea breezes/afternoon storms with peak heat
indices of 100-107F. Deep moisture, boundary collisions and weak
impulses aloft will aid in SCT-NMRS diurnal convection; highest
across the interior. The Storm Prediction Center has placed a
Marginal Risk for Severe Storms near/north of I-4 this afternoon
and evening. Primary impacts from stronger storms include frequent
lightning strikes, localized wind gusts up to 45-60 mph, and
small to coin-size hail. Additionally, weak steering flow
combined with PWATs exceeding 2" areawide will increase the
potential for quick rainfall accumulations of 1-3", with some
spots reaching 4" and greater within reach. Minor, localized
flooding will be possible with storms. Activity is forecast to
gradually diminish into the mid-late evening with cloud-cover
gradually thinning. Mostly dry conditions anticipated overnight.
Warm and humid with lows in the 70s areawide.

Sat-Mon...Unsettled pattern during this period. A weak area of
surface low pressure is forecast to develop over the NE Gulf and
now is forecast to linger a bit longer & westward across the NE
Gulf. Gradual development of this feature is possible while it
slowly moves across the NE Gulf, N/NE FL over the weekend into
Mon. In the mid-levels low pressure off of the WCFL coast is
forecast to move slowly toward the FL Big Bend into Sun and north
FL Sun night/Mon. NHC has bumped up slightly to a 30% chance of
tropical development across the NE Gulf and N FL with this
activity.

The development of the low will lead to a tightening pressure
gradient across ECFL, with southerly winds increasing to 10 to 15
mph areawide with some higher aftn gusts. Fairly deep moisture
continues across the area with 30-50% PoP chances on Sat, 50-70%
for Sun/Mon, primarily diurnally. WPC also continues to highlight
portions of ECFL in a Marginal Risk (1/4) of excessive rainfall on
Mon due to saturated soils and the ongoing active pattern. Temps
are anticipated to remain near to slightly above normal through
the period, with highs in the L90s (ISOLD M90s) and peak heat
indices 100-107F. Persistent lows in the 70s.

Tue-Thu...Previous Modified...The mid-level low over the southeast
U.S. gradually diminishes into the middle of next week, causing the
low at the surface to become diffuse. The surface ridge axis will
lift north from south FL across central FL by late in the period,
keeping winds generally out of the south outside of sea breeze
formation "backing" winds SERLY in the afternoons. As far as
shower and storm chances go, there appears to be drier air
infiltrating the central/southern FL peninsula (highest values
north FL) so week keep ISOLD-SCT (20-50%) chances in the forecast.
Temps are anticipated to trend warmer mid to late week, with
greater coverage of M90s for highs Wed/Thu. Lows remain in the
70s.

&&

.MARINE...
Issued at 237 PM EDT Fri Jul 17 2026

Thru Tonight...Generally favorable boating conditions into tonight
outside of afternoon/evening showers/lightning storms near the
coast. Offshore winds transition southerly, southeast along the
coast, and back to southwest again tonight. Speeds generally AOB 15
kts - highest well offshore. Seas 1-3 ft, locally higher invof
convection.

Sat-Tue...Unsettled weather pattern developing into this weekend as
a weak area of low pressure is forecast to develop over the
northeast Gulf. Gradual development of this feature is possible
while it slowly moves across the NE Gulf, N/NE FL into early next
week. This will lead to a tightening of the pressure gradient
increasing southerly (SW/S/SE) winds to 15-20 kts at times during
much of this period. Seas generally forecast to remain 2-4 ft. ISOLD-
SCT showers and storms are forecast.

&&

.AVIATION...
(18Z TAFs)
Issued at 145 PM EDT Fri Jul 17 2026

VFR conditions outside of convection through the TAF period. The
east coast sea breeze has formed and will push slowly inland
producing an E to SE wind shift at all coastal terminals by 19Z.
Scattered to numerous SHRA/TSRA over the western peninsula will
push an outflow boundary to the east coast where a collision with
the east coast breeze will occur. So have upgraded the PROB30 at
TIX/MLB/VRB to TEMPOs. Have brought forward the TEMPOs at
MCO/LEE/ISM based on radar trends and there is potential for wind
gusts 35 knots or greater. Lingering activity will dissipate or
move out of the area by 00/01Z across the interior and around
02/04Z for the coast. Winds will then become light and variable
once again in the evening and overnight hours. Winds will become
southerly Saturday by mid morning and increase to 5-10KT.

&&

.PRELIMINARY POINT TEMPS/POPS...
DAB  75  92  75  91 /  20  30  10  50
MCO  75  93  76  92 /  30  40  20  60
MLB  76  91  77  91 /  10  30  10  40
VRB  75  92  75  92 /  20  50  10  50
LEE  76  92  76  90 /  40  50  20  70
SFB  75  93  76  92 /  30  40  10  70
ORL  76  92  77  92 /  30  40  20  60
FPR  74  91  75  91 /  20  50  10  60

&&

.MLB WATCHES/WARNINGS/ADVISORIES...
FL...None.
AM...None.
&&

DISCUSSION...Sedlock
AVIATION...Kelly

In the hours before

Special weather statement, Jul 17, 3:32 PM EDT, 2 hours 47 minutes before
Special Weather Statement
National Weather Service Melbourne FL
332 PM EDT Fri Jul 17 2026

FLZ045-247-347-172000-
Orange FL-Mainland Northern Brevard FL-Inland Northern Brevard FL-
332 PM EDT Fri Jul 17 2026

...A STRONG THUNDERSTORM WILL IMPACT NORTHERN BREVARD AND
EASTERN ORANGE COUNTIES THROUGH 400 PM EDT...

At 330 PM EDT, Doppler radar was tracking a strong thunderstorm
along the St Johns River east of Christmas, moving northwest at 10
mph. Gusty outflow will spread to the Brevard coast with additional
storm development possible.

HAZARD...Wind gusts up to 50 mph and pea size hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor hail damage to vegetation is
         possible.

Locations impacted include...
Titusville, Wedgefield, Sharpes, Port Saint John, and Bithlo.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

Torrential rainfall is also occurring with this storm and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.

Frequent cloud to ground lightning is occurring with this storm. Seek
safe shelter inside a sturdy building or hard-topped vehicle.
Remember, lightning can strike beyond 10 miles away from a
thunderstorm. When thunder roars, go indoors!

&&

LAT...LON 2843 8075 2840 8104 2860 8113 2861 8102
      2861 8097 2862 8096 2864 8080
TIME...MOT...LOC 1930Z 127DEG 10KT 2855 8095

MAX HAIL SIZE...0.25 IN
MAX WIND GUST...50 MPH

Kelly
Special weather statement, Jul 17, 3:48 PM EDT, 2 hours 31 minutes before
Special Weather Statement
National Weather Service Melbourne FL
348 PM EDT Fri Jul 17 2026

FLZ053-547-647-172015-
Osceola FL-Inland Southern Brevard FL-Mainland Southern Brevard FL-
348 PM EDT Fri Jul 17 2026

...A STRONG THUNDERSTORM WILL IMPACT SOUTHERN BREVARD AND EAST
CENTRAL OSCEOLA COUNTIES THROUGH 415 PM EDT...

At 347 PM EDT, Doppler radar was tracking a strong thunderstorm near
Camp Holly Fish Camp. This thunderstorm was nearly stationary.

HAZARD...Wind gusts up to 50 mph and pea size hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor hail damage to vegetation is
         possible.

Locations impacted include...
Melbourne, Camp Holly Fish Camp, West Melbourne, Suntree, and Palm
Shores.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

Torrential rainfall is also occurring with this storm and may lead to
localized flooding. Do not drive your vehicle through flooded
roadways.

Frequent cloud to ground lightning is occurring with this storm. Seek
safe shelter inside a sturdy building or hard-topped vehicle.
Remember, lightning can strike beyond 10 miles away from a
thunderstorm. When thunder roars, go indoors!

&&

LAT...LON 2810 8092 2827 8092 2824 8067 2806 8059
TIME...MOT...LOC 1947Z 140DEG 1KT 2813 8074

MAX HAIL SIZE...0.25 IN
MAX WIND GUST...50 MPH

Kelly
Special weather statement, Jul 17, 4:01 PM EDT, 2 hours 18 minutes before
Special Weather Statement
National Weather Service Melbourne FL
401 PM EDT Fri Jul 17 2026

FLZ041-044-172030-
Northern Lake County FL-Inland Volusia FL-
401 PM EDT Fri Jul 17 2026

...A STRONG THUNDERSTORM WILL IMPACT NORTHEASTERN LAKE AND WESTERN
VOLUSIA COUNTIES THROUGH 430 PM EDT...

At 359 PM EDT, Doppler radar was tracking a strong thunderstorm near
Paisley, moving west at 15 mph. Additional storms and gusty outflow
winds will affect northwest Volusia county, including Lake George.

HAZARD...Wind gusts up to 50 mph and pea size hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor hail damage to vegetation is
         possible.

Locations impacted include...
Pierson, Barberville, Paisley, Lake George, and Pittman.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

Torrential rainfall is also occurring with this storm and may lead to
localized flooding. Do not drive your vehicle through flooded
roadways.

Frequent cloud to ground lightning is occurring with this storm. Seek
safe shelter inside a sturdy building or hard-topped vehicle.
Remember, lightning can strike beyond 10 miles away from a
thunderstorm. When thunder roars, go indoors!

&&

LAT...LON 2921 8143 2903 8133 2891 8146 2899 8166
      2905 8166 2905 8164 2928 8164 2930 8166
      2933 8165 2934 8163
TIME...MOT...LOC 1959Z 108DEG 12KT 2902 8152

MAX HAIL SIZE...0.25 IN
MAX WIND GUST...50 MPH

Kelly
Special weather statement, Jul 17, 4:27 PM EDT, 1 hour 52 minutes before
Special Weather Statement
National Weather Service Melbourne FL
427 PM EDT Fri Jul 17 2026

FLZ041-172045-
Inland Volusia FL-
427 PM EDT Fri Jul 17 2026

...A STRONG THUNDERSTORM WILL IMPACT NORTHWESTERN VOLUSIA COUNTY
THROUGH 445 PM EDT...

At 427 PM EDT, Doppler radar was tracking a strong thunderstorm over
Lake George, or 8 miles northwest of Pierson, moving northwest at 15
mph.

HAZARD...Wind gusts of 50 to 55 mph and penny size hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor hail damage to vegetation is
         possible.

Locations impacted include...
Lake George and Seville.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

Torrential rainfall is also occurring with this storm and may lead to
localized flooding. Do not drive your vehicle through flooded
roadways.

Frequent cloud to ground lightning is occurring with this storm. Seek
safe shelter inside a sturdy building or hard-topped vehicle.
Remember, lightning can strike beyond 10 miles away from a
thunderstorm. When thunder roars, go indoors!

&&

LAT...LON 2932 8149 2921 8158 2922 8162 2924 8163
      2930 8165 2930 8166 2932 8168 2936 8154
TIME...MOT...LOC 2027Z 113DEG 15KT 2930 8159

MAX HAIL SIZE...0.75 IN
MAX WIND GUST...55 MPH

Kelly
Special weather statement, Jul 17, 6:04 PM EDT, 15 minutes before
Special Weather Statement
National Weather Service Melbourne FL
604 PM EDT Fri Jul 17 2026

FLZ154-159-259-172230-
Coastal St. Lucie FL-Inland St. Lucie FL-Coastal Indian River FL-
604 PM EDT Fri Jul 17 2026

...A STRONG THUNDERSTORM WILL IMPACT NORTHEASTERN ST. LUCIE AND
SOUTHEASTERN INDIAN RIVER COUNTIES THROUGH 630 PM EDT...

At 603 PM EDT, Doppler radar was tracking a strong thunderstorm over
Fort Pierce North, or near Indrio, moving south at 15 mph.

HAZARD...Wind gusts up to 50 mph.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects.

Locations impacted include...
Fort Pierce, White City, Indrio, Vero Beach South, and Vero Beach
Highland.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

Torrential rainfall is also occurring with this storm and may lead to
localized flooding. Do not drive your vehicle through flooded
roadways.

Frequent cloud to ground lightning is occurring with this storm. Seek
safe shelter inside a sturdy building or hard-topped vehicle.
Remember, lightning can strike beyond 10 miles away from a
thunderstorm. When thunder roars, go indoors!

&&

LAT...LON 2737 8028 2738 8051 2759 8046 2759 8037
TIME...MOT...LOC 2203Z 353DEG 11KT 2746 8040

MAX HAIL SIZE...0.00 IN
MAX WIND GUST...50 MPH

Law
Special weather statement, Jul 17, 6:16 PM EDT, 3 minutes before
Special Weather Statement
National Weather Service Melbourne FL
616 PM EDT Fri Jul 17 2026

FLZ164-264-172300-
Inland Martin FL-Coastal Martin FL-
616 PM EDT Fri Jul 17 2026

...A STRONG THUNDERSTORM WILL IMPACT SOUTHEASTERN MARTIN COUNTY
THROUGH 700 PM EDT...

At 615 PM EDT, Doppler radar was tracking a strong thunderstorm 9
miles east of Indiantown, moving north at 15 mph.

HAZARD...Wind gusts up to 50 mph.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects.

Locations impacted include...
Stuart, Indiantown, Port Salerno, and Palm City.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

Torrential rainfall is also occurring with this storm and may lead to
localized flooding. Do not drive your vehicle through flooded
roadways.

Frequent cloud to ground lightning is occurring with this storm. Seek
safe shelter inside a sturdy building or hard-topped vehicle.
Remember, lightning can strike beyond 10 miles away from a
thunderstorm. When thunder roars, go indoors!

&&

LAT...LON 2696 8044 2715 8048 2717 8020 2695 8019
      2696 8021
TIME...MOT...LOC 2215Z 172DEG 13KT 2699 8032

MAX HAIL SIZE...0.00 IN
MAX WIND GUST...50 MPH

Law

The office that day

Everything else NWS Melbourne, FL issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jul 17, 1:27 PM EDTSpecial Weather StatementMLBLake33 min
Jul 17, 1:59 PM EDTSpecial Weather StatementMLBLake31 min
Jul 17, 2:46 PM EDTSpecial Weather StatementMLBOrange, Seminole29 min
Jul 17, 3:00 PM EDTSevere Thunderstorm WarningMLBOrange, Seminole30 min
Jul 17, 3:24 PM EDTSpecial Weather StatementMLBVolusia36 min
Jul 17, 3:32 PM EDTSpecial Weather StatementMLBSeminole28 min
Jul 17, 3:37 PM EDTSpecial Marine WarningMLB53 min
Jul 17, 3:48 PM EDTSpecial Weather StatementMLBBrevard27 min
Jul 17, 4:01 PM EDTSpecial Weather StatementMLBVolusia29 min
Jul 17, 4:27 PM EDTSpecial Weather StatementMLBFlagler18 min
Jul 17, 5:24 PM EDTSpecial Marine WarningMLB33 min
Jul 17, 6:04 PM EDTSpecial Weather StatementMLBSaint Lucie26 min
Jul 17, 6:06 PM EDTSpecial Marine WarningMLB54 min
Jul 17, 6:16 PM EDTSpecial Weather StatementMLBMartin44 min
Jul 17, 6:29 PM EDTSpecial Weather StatementMLBSaint Lucie46 min
Jul 17, 6:32 PM EDTAreal Flood AdvisoryMLBSaint Lucie58 min
Jul 17, 6:52 PM EDTAreal Flood AdvisoryMLBMartin, Saint Lucie83 min
Jul 17, 6:59 PM EDTSpecial Marine WarningMLB61 min

Nearby

Severe Thunderstorm Warnings in Florida, 2026Every severe thunderstorm warning in 2026

Sources

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.