Alert archive / Florida / Severe Thunderstorm Warnings in 2026

Severe Thunderstorm Warning 36, NWS Miami, FL

June 17, 2026Palm Beach County, Florida

NWS Miami, FL issued this severe thunderstorm warning at Jun 17, 2026, 6:26 PM EDT for Palm Beach County, Florida. It was in force for 34 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
Jun 17, 2026, 6:26 PM EDT (22:26 UTC)
Expired
Jun 17, 2026, 7:00 PM EDT
In force
34 min
Issued by
NWS Miami, FL
Area
Storm-based polygon
Hail
0.75 in
Wind
60.0 mph

County Palm Beach County, FL

The radar

The Miami radar (KAMX), 121 km from the middle of the area, began a volume at 22:28 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, 10.4 hours before the alert went out and 99 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 2026-06-17Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1172 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 2026-06-17The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -8 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
1172 J/kg
Mixed-layer CIN
-8 J/kg
Mixed-layer LCL
789 m above ground
0-6 km bulk shear
11 kt
0-1 km storm-relative helicity
-8 m²/s²
0-3 km storm-relative helicity
9 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

348 
WUUS52 KMFL 172226
SVRMFL
FLC099-172300-
/O.NEW.KMFL.SV.W.0036.260617T2226Z-260617T2300Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Miami FL
626 PM EDT Wed Jun 17 2026

The National Weather Service in Miami has issued a

* Severe Thunderstorm Warning for...
  Central Palm Beach County in southeastern Florida...

* Until 700 PM EDT.

* At 625 PM EDT, severe thunderstorms were located along a line
  extending from 7 miles west of North County Airport to 9 miles east
  of Belle Glade to near Okeelanta, and are nearly stationary.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

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

* Locations impacted include...
  Palm Beach Gardens, Belle Glade, Okeelanta, North County Airport,
  Loxahatchee Groves, Lion Country Safari Park, The Acreage,
  Loxahatchee NWR, and Caloosa.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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

&&

LAT...LON 2688 8016 2657 8037 2639 8062 2656 8075
      2693 8038
TIME...MOT...LOC 2225Z 298DEG 4KT 2689 8034 2666 8053 2656 8066 

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

$$

MFL
1 follow-up statement
151 
WWUS52 KMFL 172251
SVSMFL

Severe Weather Statement
National Weather Service Miami FL
651 PM EDT Wed Jun 17 2026

FLC099-172300-
/O.CON.KMFL.SV.W.0036.000000T0000Z-260617T2300Z/
Palm Beach FL-
651 PM EDT Wed Jun 17 2026

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 700 PM EDT
FOR CENTRAL PALM BEACH COUNTY...

At 650 PM EDT, severe thunderstorms were located along a line
extending from 6 miles west of North County Airport to 9 miles
southwest of Lion Country Safari Park to 6 miles southeast of
Okeelanta, and are nearly stationary.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

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

Locations impacted include...
Palm Beach Gardens, Belle Glade, Okeelanta, North County Airport,
Loxahatchee Groves, Lion Country Safari Park, The Acreage,
Loxahatchee NWR, and Caloosa.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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

&&

LAT...LON 2689 8020 2676 8024 2657 8037 2642 8058
      2658 8073 2693 8038
TIME...MOT...LOC 2250Z 298DEG 4KT 2688 8031 2665 8050 2655 8063 

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

$$

MFL

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 Miami, FL wrote its last area forecast discussion before this severe thunderstorm warning went out at Jun 17, 3:01 PM EDT, 3 hours 25 minutes earlier. Its key messages:

  • Updated at 222 PM EDT Wed Jun 17 2026
  • A Heat Advisory remains in effect through 6PM tonight for coastal/metro Miami- Dade and Broward. Further heat concerns are expected for all of South FL through the end of the week.
  • Scattered thunderstorms are expected this afternoon into early evening, mainly across Southeast Florida. Heavy rainfall may result in localized urban and poor drainage flooding.
  • Smoke from wildfire activity in central Miami-Dade county will continue to drift northwards/northeastwards and could cause lower air quality that may be hazardous to sensitive populations.
Area forecast discussion, Jun 17, 3:01 PM EDT, 3 hours 25 minutes before
Area Forecast Discussion
National Weather Service Miami FL
301 PM EDT Wed Jun 17 2026

...New SHORT TERM, LONG TERM, MARINE, FIRE WEATHER...

.KEY MESSAGES...
Updated at 222 PM EDT Wed Jun 17 2026

  - A Heat Advisory remains in effect through 6PM tonight for
    coastal/metro Miami- Dade and Broward. Further heat concerns
    are expected for all of South FL through the end of the week.

  - Scattered thunderstorms are expected this afternoon into early
    evening, mainly across Southeast Florida. Heavy rainfall may
    result in localized urban and poor drainage flooding.

  - Smoke from wildfire activity in central Miami-Dade county will
    continue to drift northwards/northeastwards and could cause
    lower air quality that may be hazardous to sensitive
    populations.

&&

.SHORT TERM...
(Rest of today through Thursday)
Issued at 222 PM EDT Wed Jun 17 2026

A majority of the country remains under broad troughing that
stretches from the plains to the east coast. However, here across
the southeast U.S there is an area of surface high pressure
centered out in the Atlantic along with Potential Tropical Cyclone
One, currently meandering along the Texas coast southwest of
Houston. This area of high pressure will continue to dominate the
pattern for the short term period. In terms of rain chances,
scattered rain and storm chances are expected across inland south
Florida through this afternoon and evening, more so isolated
towards coastal areas. Thursday will see a noticeable decrease in
PoPs, with coastal areas seeing only ~10-20% while inland areas
jump down to ~25-35%. With this, isolated storms remain a
possibility but less coverage expected than previous days.

The heat will continue to be the main impact of the short term
period as a Heat Advisory remain in effect through 6PM this evening.
The HeatRisk shows Major heatRisk (Level 3 out of 4) once again on
Thursday, giving the likelihood of a Heat Advisory being issued for
tomorrow during the next forecast package later tonight. MaxTs on
Thursday will be in the same realm as today, peaking in the mid 90s
in the afternoon hours. Overnight lows tonight and Thursday night
will fall into the low 70s near Lake Okeechobee to the upper 70s and
low 80s near the coasts.

&&

.LONG TERM...
(Thursday night through next Tuesday)
Issued at 222 PM EDT Wed Jun 17 2026

Heading into the long term period, surface high pressure will
start weaken as PTC One progresses eastward. PTC One looks to get
absorbed in the bigger upper level troughing, which will allow
that troughing to creep further southward. This brings an increase
in PoPs Friday afternoon and lasting into the weekend, with Friday
jumping up into the ~60-70% range inland and 40-50% range along
the coasts. Saturday currently looks to have the potential to be
the wettest day of the period with another jump in rain and
thunderstorm chances. For the most part, convection will likely be
driven by sea breeze and remnant outflow boundaries during the
afternoon hours each day. This more active pattern looks to last
into early next week with scattered showers and storms each day
in the afternoon hours.

In terms of the temperatures, not a ton of change expected in the
Max and MinTs through the end of the period. Afternoon highs peak
in the low to mid 90s with overnight lows in the low to mid 70s
inland and upper 70s to lower 80s towards the coasts. This keeps
the HeatRisk likely in the Major (level 3 out of 4) category each
day, with low chances of reaching Extreme HeatRisk (level 4 out
4) some days. Additionally heat indices will approach advisory
criteria , 105-110F, each day. Any showers and storms that we see
fire each day, may bring some brief relief from the heat.

&&

.AVIATION...
(18Z TAFS)
Issued at 124 PM EDT Wed Jun 17 2026

Prevailing VFR at all terminals this afternoon and this will
continue throughout the forecast period. Gusty winds out of the
SSE, ranging from 15-25kts, will continue throughout the
afternoon. These winds should start to come back down later into
the evening hours. Isolated to scattered showers and storms may
develop as we head through the afternoon, which could briefly
bring MVFR or IFR conditions. Some terminals, mainly FLL and FXE,
are likely to see slightly reduced visibilities at times due to
wildfire smoke.

&&

.MARINE...
Issued at 222 PM EDT Wed Jun 17 2026

Gentle to moderate southerly winds continue this afternoon across
the Atlantic with gentle to moderate southwesterly winds across
the Gulf. These winds will shift southeasterly for the Atlantic
later this evening and southerly for the Gulf. Scattered
thunderstorms are possible across the local waters each day with
locally hazardous winds and seas possible with any storms. Seas
are expected at 1-2 feet or less outside of any thunderstorm
activity.

&&

.FIRE WEATHER...
Issued at 222 PM EDT Wed Jun 17 2026

Light south to southwesterly winds will continue this afternoon
across South Florida. Winds are likely to shift more southeasterly
across Southeast Florida later tonight but remain south to
southwesterly across Southwest Florida. Scattered thunderstorms
today will again develop in the afternoon into early evening with
most activity expected across inland and Southeast Florida.
Dispersions will be good to very good today for most areas with
excellent values west of Lake Okeechobee. RH values will remain
well above critical values.

&&

.PRELIMINARY POINT TEMPS/POPS...
Miami            80  93  80  93 /  20  10  10  50
West Kendall     78  94  79  94 /  10  20  10  60
Opa-Locka        80  94  80  94 /  20  10  10  50
Homestead        80  93  81  93 /  10  10  10  40
Fort Lauderdale  81  92  81  92 /  30  10  10  50
N Ft Lauderdale  80  92  80  92 /  30  10  10  60
Pembroke Pines   81  96  81  96 /  30  10  10  50
West Palm Beach  79  92  80  93 /  30  10  10  70
Boca Raton       81  91  81  92 /  30  10  10  60
Naples           80  92  80  92 /   0  10   0  20

&&

.MFL WATCHES/WARNINGS/ADVISORIES...
FL...Heat Advisory until 6 PM EDT this evening for FLZ072-074-172-173.

AM...None.
GM...None.
&&

SHORT TERM...99
LONG TERM....99
AVIATION...99

In the hours before

Special weather statement, Jun 17, 6:17 PM EDT, 9 minutes before
Special Weather Statement
National Weather Service Miami FL
617 PM EDT Wed Jun 17 2026

FLZ067-068-172245-
Inland Palm Beach County FL-Metro Palm Beach County FL-
617 PM EDT Wed Jun 17 2026

...Strong thunderstorms will impact portions of central Palm Beach
County through 645 PM EDT...

At 617 PM EDT, National Weather Service meteorologists were tracking
strong thunderstorms along a line extending from 8 miles northwest of
Lion Country Safari Park to 9 miles east of Belle Glade to near Holey
Land Wildlife Refuge. Movement was east at 5 mph.

HAZARD...Wind gusts of 45 to 50 mph.

SOURCE...Radar indicated.

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

Locations impacted include...
Palm Beach Gardens, Belle Glade, Okeelanta, North County Airport,
Lion Country Safari Park, The Acreage, Loxahatchee Groves, and
Loxahatchee NWR.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

These winds can down small tree limbs and branches, and blow around
unsecured small objects. Seek shelter in a safe building until the
storm passes.

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

Excessive 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.

&&

LAT...LON 2687 8018 2661 8039 2640 8067 2651 8080
      2672 8060 2691 8044
TIME...MOT...LOC 2217Z 290DEG 5KT 2682 8043 2668 8051 2651 8072

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

MFL

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 17, 1:55 AM EDTHeat AdvisoryMFLBroward, Miami-Dade16 hr
Jun 17, 6:17 PM EDTSpecial Weather StatementMFLPalm Beach28 min
Jun 17, 7:08 PM EDTSpecial Weather StatementMFLPalm Beach37 min
Jun 17, 7:10 PM EDTSpecial Marine WarningMFL35 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.