Alert archive / Florida / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 23, NWS Miami, FL

May 14, 2011Palm Beach County, Florida

NWS Miami, FL issued this severe thunderstorm warning at May 14, 2011, 4:15 PM EDT for Palm Beach County, Florida. It was in force for 45 min. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: May 14, 2011, 4:15 PM EDT (20:15 UTC)
Expired: May 14, 2011, 5:00 PM EDT
In force: 45 min
Issued by: NWS Miami, FL
Area: Storm-based polygon

County Palm Beach County, FL

The radar

The Miami radar (KAMX), 103 km from the middle of the area, began a volume at 20:18 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.

What was reported inside it

Time	Report	Where	Remark
May 14, 4:35 PM EDT	TSTM WND DMG	1 S Lion Country Safari, FL	PALM BEACH COUNTY EMERGENCY MANAGEMENT RELAYED REPORTS OF HAIL AND DOWNED POWERLINES/TREE LIMBS ALONG SOUTHERN BOULEVARD BETWEEN LION COUNTRY SAFARI AND 20-MILE BEND.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

Did it verify

Verified. The Iowa Environmental Mesonet's Cow matched one storm report to this severe thunderstorm warning; the first came 20 minutes after it went out.

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, 8.3 hours before the alert went out and 81 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 674 J/kg
Mixed-layer CIN: -63 J/kg
Mixed-layer LCL: 1032 m above ground
0-6 km bulk shear: 16 kt
0-1 km storm-relative helicity: -17 m²/s²
0-3 km storm-relative helicity: 6 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

998 
WUUS52 KMFL 142015
SVRMFL
FLC099-142100-
/O.NEW.KMFL.SV.W.0023.110514T2015Z-110514T2100Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MIAMI FL
415 PM EDT SAT MAY 14 2011

THE NATIONAL WEATHER SERVICE IN MIAMI HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHERN AND CENTRAL PALM BEACH COUNTY IN SOUTH FLORIDA.

* UNTIL 500 PM EDT

* AT 413 PM EDT...NATIONAL WEATHER SERVICE METEOROLOGISTS HAVE
  DETECTED A LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING
  QUARTER SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THESE
  STORMS WERE LOCATED ALONG A LINE EXTENDING FROM 5 MILES SOUTHWEST
  OF OKEELANTA TO 14 MILES WEST OF LOXAHATCHEE NATIONAL WILDLIFE 
  REFUGE TO 15 MILES SOUTHWEST OF LOXAHATCHEE NATIONAL WILDLIFE 
  REFUGE...AND MOVING EAST AT 25 MPH.

* THE LINE OF STORMS WILL AFFECT...
  LOXAHATCHEE NATIONAL WILDLIFE REFUGE...
  AND SURROUNDING COMMUNITIES.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEVERE THUNDERSTORMS CAN PRODUCE VERY STRONG WINDS IN EXCESS OF 60
MPH...LARGE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAINFALL. STAY
INSIDE AWAY FROM WINDOWS UNTIL THE STORM HAS PASSED.

&&

LAT...LON 2675 8035 2649 8023 2634 8022 2634 8051
      2642 8075 2663 8082
TIME...MOT...LOC 2015Z 270DEG 22KT 2660 8068 2650 8044
          2634 8039

$$

GREGORIA

1 follow-up statement

913 
WWUS52 KMFL 142054
SVSMFL

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MIAMI FL
454 PM EDT SAT MAY 14 2011

FLC099-142104-
/O.EXP.KMFL.SV.W.0023.000000T0000Z-110514T2100Z/
PALM BEACH FL-
454 PM EDT SAT MAY 14 2011

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHERN AND CENTRAL PALM 
BEACH COUNTY WILL EXPIRE AT 500 PM EDT...

NATIONAL WEATHER SERVICE RADAR INDICATED THAT THE THUNDERSTORMS HAVE 
MOVED OUT OF THE WARNED AREA. THUS...THE SEVERE THUNDERSTORM WARNING 
WILL EXPIRE AT 500 PM EDT.

THUNDERSTORMS REMAIN IN THE AREA. FREQUENT LIGHTNING...GUSTY WINDS TO
40 MPH...VERY HEAVY RAINFALL AND SMALL HAIL ARE STILL POSSIBLE. STAY
TUNED TO NOAA WEATHER RADIO OR LOCAL MEDIA FOR THE LATEST UPDATES.

LAT...LON 2675 8035 2649 8023 2634 8022 2634 8051
      2642 8075 2663 8082
TIME...MOT...LOC 2054Z 270DEG 22KT 2660 8041 2650 8017
          2634 8012

$$

GREGORIA

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 May 14, 2:39 PM EDT, 1 hour 36 minutes earlier.

Area forecast discussion, May 14, 2:39 PM EDT, 1 hour 36 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE MIAMI FL
239 PM EDT SAT MAY 14 2011

...ISOLATED SEVERE THUNDERSTORMS EXPECTED THROUGH THIS EVENING...

.DISCUSSION...SEVERE TSTORMS HAVE AFFECTED AREAS JUST NORTH OF
LAKE OKEECHOBEE ALREADY. THE ATLANTIC SEA BREEZE HAS MOVED FURTHER
INLAND THAN PREVIOUSLY THOUGHT. HOWEVER...A STEP OUTSIDE SHOWS A
CB BUILDING AND SAT IMAGERY SHOWS THE CU FIELD BECOMING BETTER
DEFINED OVER THE INTERIOR. SO ANTICIPATE CELLS TO DEVELOP OVER THE
INTERIOR WITH MOVEMENT TOWARDS THE EAST COAST. AS SUCH...WILL KEEP
POPS STATUS QUO...EXCEPT HAVE INCREASED POPS FOR THE GULF
COAST/NAPLES AREA FOR THIS EVENING...AS THE HIGH RES RUC SHOWS THE
LINE OF STORMS OVER THE GULF OF MEXICO ORGANIZING AND MOVING
QUICKLY SE AFFECTING THE GULF COAST BY MID EVENING.

THE MORNING MIAMI SOUNDING WAS HIGHLY UNSTABLE WITH CAPE NEAR 3000
J/KG...LI -7.1C...BUT THE MOST IMPRESSIVE ASPECT IS THE VERY STEEP
LAPSE RATE IN THE HAIL GROWTH ZONE (7.4C/KM FROM -10C TO -30C BUT
-8.6 FROM -10C TO -20C!). H5 TEMP IS -11.3C. WET BULB ZERO HEIGHT
IS AROUND 8400 FT...VERY LOW FOR SOUTH FL. PW IS ONLY 1.2
INCHES AND SHEAR IS LOW. SO PULSE ISOLATED SEVERE STORMS ARE
EXPECTED WITH DAMAGING WINDS AND LARGE HAIL THE PRIMARY
HAZARDS...AS WELL AS FREQUENT LIGHTNING STRIKES. WE THINK GIVEN
THE LOW WET BULB ZERO HGT AND THE VERY STEEP LAPSE RATES IN THE
HAIL GROWTH LAYER...THAT HAIL EVEN UP TO GOLF BALL SIZE IS A
POSSIBILITY ALONG THE ATLANTIC COAST. DAMAGING WINDS ARE A
POSSIBILITY ALONG THE GULF COAST/NAPLES AREA SHOULD A SQUALL LINE
DEVELOP. THE HAZARDOUS WEATHER OUTLOOK WAS UPDATED TO REFLECT
SEVERE POTENTIAL ALL AREAS THROUGH THIS EVENING.

THE FORECAST FOR BEYOND WAS RELATIVELY UNCHANGED. DID INCREASE POPS
FOR THE NIGHT GULF COAST AS CONVECTION LOOKS POSSIBLE THERE
THROUGHOUT THE NIGHT...BUT NOT LIKELY EAST COAST SO KEPT THAT AREA
DRY OVERNIGHT. MODELS INDICATE SCATTERED SHOWERS/STORMS AFFECTING
THE GULF COAST/INTERIOR DURING THE MORNING SUNDAY BEFORE SHIFTING
EAST DURING THE DAY...SO REFLECTED THIS TREND BY INCREASING
MORNING POPS INTERIOR/GULF COAST.

A SOMEWHAT DRIER/QUIETER DAY IS EXPECTED ON MONDAY BUT ANOTHER
IMPULSE FROM THE NW WITH HIGHER MOISTURE IS EXPECTED ON
TUESDAY...SO THIS COULD LEAD TO MORE TSTORMS TUE COMPARED TO MON.
STRONG/ISD SEVERE WILL CONTINUE TO BE POSSIBLE.

FROM PREV DISCUSSION...DESPITE SOME MINOR DIFFERENCES, THE GFS
AND ECMWF GENERALLY AGREE IN THE TROUGH PERSISTING THROUGH MID-
WEEK, ALTHOUGH NO HIGHER THAN 20-30 POPS BY WEDNESDAY-THURSDAY AS
SOMEWHAT DRIER AIR GRADUALLY FILTERS INTO THE REGION. MEX GUIDANCE
ALSO SHOWS SOMEWHAT COOLER TEMPERATURES TUESDAY THROUGH
THURSDAY...BEFORE WARMING BACK UP BY FRIDAY.

&&

.MARINE...NO HEADLINES NEEDED AS THE NE SWELL CONTINUES TO
SUBSIDE. SUSTAINED WINDS WILL PREVAIL AT 10-15 KT NEXT FEW DAYS.
MAIN HAZARD WILL BE TSTORMS MOVING ACROSS THE WATERS...ESPECIALLY
THE GULF WATERS THIS EVENING AND MOVING OFF THE ATLANTIC COAST
LATER TODAY AND THE NEXT FEW DAYS.

&&

.FIRE WEATHER...NO CONCERNS.

&&

.PRELIMINARY POINT TEMPS/POPS...
WEST PALM BEACH  73  87  69  85 / 40 50 30 30
FORT LAUDERDALE  75  88  74  86 / 40 50 30 30
MIAMI            74  88  73  85 / 30 50 30 30
NAPLES           72  89  67  86 / 40 40 20 20

&&

.MFL WATCHES/WARNINGS/ADVISORIES...
FL...NONE.
AM...NONE.
GM...NONE.
&&

DISCUSSION/MARINE...57/DG
AVIATION/RADAR/FIRE...04/AT

Hazardous weather outlook, May 14, 1:50 PM EDT, 2 hours 25 minutes before

HAZARDOUS WEATHER OUTLOOK FOR SOUTH FLORIDA
NATIONAL WEATHER SERVICE MIAMI FL
150 PM EDT SAT MAY 14 2011

FLZ063-066>075-168-172>174-150930-
GLADES-HENDRY-INLAND PALM BEACH-METRO PALM BEACH-COASTAL COLLIER-
INLAND COLLIER-INLAND BROWARD-METRO BROWARD-INLAND MIAMI DADE-
METRO MIAMI DADE-MAINLAND MONROE-COASTAL PALM BEACH-
COASTAL BROWARD-COASTAL MIAMI DADE-FAR SOUTH MIAMI DADE-
150 PM EDT SAT MAY 14 2011

...ISOLATED SEVERE THUNDERSTORMS EXPECTED THROUGH THIS EVENING...
...HIGH RISK OF RIP CURRENTS PALM BEACH COAST...

THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTH FLORIDA.

.DAY ONE...TODAY AND TONIGHT

RIP CURRENTS: THERE IS A HIGH RISK OF RIP CURRENTS ALONG THE PALM
BEACH COAST DUE TO A CONTINUED NORTHEAST SWELL. THERE IS A
MODERATE RISK OF RIP CURRENTS AT THE BROWARD AND MIAMI DADE
COUNTY BEACHES.

THUNDERSTORMS: SCATTERED THUNDERSTORMS ARE EXPECTED TO DEVELOP
ACROSS INTERIOR AND ATLANTIC COASTAL SECTIONS OF SOUTH FLORIDA
THIS AFTERNOON INTO EARLY THIS EVENING. ALONG THE GULF COAST, A
LINE OF THUNDERSTORMS OVER THE GULF OF MEXICO COULD ORGANIZE
FURTHER AND MOVE INTO THE AREA THIS EVENING. A FEW SEVERE
THUNDERSTORMS CONTAINING DAMAGING WINDS AND LARGE HAIL ARE
EXPECTED ACROSS SOUTH FLORIDA THROUGH THIS EVENING. FREQUENT
LIGHTNING WILL ALSO ACCOMPANY THE STORMS.

WIND: STRONG WIND GUSTS OF AROUND 60 MPH WILL BE POSSIBLE WITH
A FEW OF THE STORMS ACROSS THE INTERIOR AND ATLANTIC COAST THIS
AFTERNOON THROUGH EARLY THIS EVENING...AND ALONG THE GULF COAST
DURING THE EVENING HOURS.

HAIL: LARGE HAIL IS POSSIBLE WITH THE THUNDERSTORMS THROUGH THIS
EVENING...WITH HAIL UP TO THE SIZE OF GOLF BALLS EVEN POSSIBLE
ACROSS THE EAST COAST COUNTIES.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY

THERE IS A DAILY RISK OF THUNDERSTORMS OVER MUCH OF THE REGION,
ESPECIALLY EASTERN AREAS, THROUGH AT LEAST TUESDAY. SOME STRONG TO
SEVERE THUNDERSTORMS COULD OCCUR...WITH POTENTIALLY DAMAGING
WINDS AND LARGE HAIL.

.SPOTTER INFORMATION STATEMENT...

SPOTTERS ARE ENCOURAGED TO REPORT HIGH WIND AND HAIL TO THE
NATIONAL WEATHER SERVICE FORECAST OFFICE IN MIAMI.

FOR MORE INFORMATION...VISIT THE NATIONAL WEATHER SERVICE IN
MIAMI WEBSITE AT WWW.WEATHER.GOV/MIAMI.

GREGORIA

In the hours before

Special weather statement, May 14, 3:05 PM EDT, 1 hour 10 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MIAMI FL
305 PM EDT SAT MAY 14 2011

FLZ067-141945-
INLAND PALM BEACH COUNTY FL-
305 PM EDT SAT MAY 14 2011

THE NATIONAL WEATHER SERVICE IN MIAMI HAS ISSUED A

* SIGNIFICANT WEATHER ADVISORY FOR...
  NORTHWEST PALM BEACH COUNTY

* UNTIL 345 PM EDT

* AT 300 PM EDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
  LINE OF STRONG THUNDERSTORMS OVER LAKE OKEECHOBEE...ALONG A LINE
  EXTENDING FROM 8 MILES SOUTHEAST OF BUCKHEAD RIDGE TO 4 MILES
  WEST OF PAHOKEE...AND MOVING EAST AT 15 MPH.

* THE LINE OF STORMS WILL AFFECT...
  PAHOKEE...
  CANAL POINT...
  AND SURROUNDING COMMUNITIES.

FREQUENT TO EXCESSIVE LIGHTNING...GUSTY WINDS FROM 45 T0 55 MPH...UP
TO NICKEL-SIZED HAIL...TORRENTIAL DOWNPOURS...OR A COMBINATION OF
THESE ARE POSSIBLE. LIGHTNING IS THE NUMBER ONE WEATHER RELATED
KILLER IN FLORIDA. TREES AND OPEN SHELTERS OFFER NO PROTECTION. 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.

RESIDENTS NEAR THE PATH OF SHOULD REMAIN ON THE ALERT FOR ADDITIONAL
STATEMENTS AND POSSIBLE WARNINGS.

STAY TUNED TO NOAA WEATHER RADIO AND OTHER LOCAL MEDIA FOR FURTHER
DETAILS OR UPDATES.

LAT...LON 2682 8040 2678 8070 2679 8070 2681 8070
      2685 8065 2689 8062 2695 8062 2696 8061
      2696 8041
TIME...MOT...LOC 1904Z 257DEG 14KT 2710 8075 2684 8070

GREGORIA

Special weather statement, May 14, 3:09 PM EDT, 1 hour 6 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MIAMI FL
309 PM EDT SAT MAY 14 2011

FLZ067-141945-
INLAND PALM BEACH COUNTY FL-
309 PM EDT SAT MAY 14 2011

THE NATIONAL WEATHER SERVICE IN MIAMI HAS ISSUED A

* SIGNIFICANT WEATHER ADVISORY FOR...
  CENTRAL PALM BEACH COUNTY

* UNTIL 345 PM EDT

* AT 304 PM EDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
  RAPIDLY DEVELOPING STRONG THUNDERSTORM 3 MILES SOUTH OF BELLE
  GLADE...AND MOVING NORTHEAST AT 15 MPH.

* THE STORM WILL AFFECT...
  AREAS BETWEEN BELLE GLADE AND LION COUNTRY SAFARI.

FREQUENT TO EXCESSIVE LIGHTNING...GUSTY WINDS FROM 45 T0 55 MPH...UP
TO NICKEL-SIZED HAIL...TORRENTIAL DOWNPOURS...OR A COMBINATION OF
THESE ARE POSSIBLE. LIGHTNING IS THE NUMBER ONE WEATHER RELATED
KILLER IN FLORIDA. TREES AND OPEN SHELTERS OFFER NO PROTECTION. 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.

RESIDENTS NEAR THE PATH OF SHOULD REMAIN ON THE ALERT FOR ADDITIONAL
STATEMENTS AND POSSIBLE WARNINGS.

LAT...LON 2685 8055 2665 8036 2657 8067 2667 8074
TIME...MOT...LOC 1908Z 243DEG 13KT 2665 8064

GREGORIA

Special weather statement, May 14, 3:18 PM EDT, 57 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MIAMI FL
318 PM EDT SAT MAY 14 2011

FLZ070-071-142000-
INLAND BROWARD COUNTY FL-INLAND COLLIER COUNTY FL-
318 PM EDT SAT MAY 14 2011

THE NATIONAL WEATHER SERVICE IN MIAMI HAS ISSUED A

* SIGNIFICANT WEATHER ADVISORY FOR...
  WESTERN BROWARD COUNTY
  EXTREME EAST CENTRAL COLLIER COUNTY

* UNTIL 400 PM EDT

* AT 317 PM EDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
  LINE OF STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM MICCOSUKEE
  INDIAN RESERVATION TO 10 MILES SOUTHEAST OF MICCOSUKEE SERVICE
  PLAZA...AND MOVING EAST AT 5 MPH.

* THE LINE OF STORMS WILL AFFECT...
  COLLIER/BROWARD LINE AND ALLIGATOR ALLEY...
  MICCOSUKEE SERVICE PLAZA...
  AND SURROUNDING COMMUNITIES.

FREQUENT TO EXCESSIVE LIGHTNING...GUSTY WINDS FROM 45 T0 55 MPH...UP
TO NICKEL-SIZED HAIL...TORRENTIAL DOWNPOURS...OR A COMBINATION OF
THESE ARE POSSIBLE. LIGHTNING IS THE NUMBER ONE WEATHER RELATED
KILLER IN FLORIDA. TREES AND OPEN SHELTERS OFFER NO PROTECTION. 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.

LAT...LON 2632 8058 2599 8063 2600 8087 2624 8090
TIME...MOT...LOC 1918Z 270DEG 4KT 2619 8088 2605 8076

KOB

Local storm report, May 14, 3:45 PM EDT, 30 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MIAMI FL
345 PM EDT SAT MAY 14 2011

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0315 PM     MARINE TSTM WIND 10 NW PAHOKEE           26.90N 80.79W
05/14/2011  M52 MPH          AMZ610             FL   MESONET

            A MESONET STATION NEAR THE CENTER OF LAKE OKEECHOBEE
            RECORDED A WIND GUST OF 45 KTS...OR 52 MPH...AT 315 PM
            EDT. SUSTAINED WINDS WERE 28 KTS...OR 32 MPH...OUT OF THE
            WEST.

0300 PM     MARINE TSTM WIND 7 W PAHOKEE             26.81N 80.78W
05/14/2011  M39 MPH          AMZ610             FL   MESONET

            A LAKE OKEECHOBEE MESONET STATION REPORTED A WIND GUST OF
            34 KTS...OR 39 MPH...AT 300 PM EDT. SUSTAINED WINDS WERE
            15 KTS...OR 17 MPH...OUT OF THE WEST-SOUTHWEST.

&&

ROSS

Special weather statement, May 14, 3:47 PM EDT, 28 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MIAMI FL
347 PM EDT SAT MAY 14 2011

FLZ067-142015-
INLAND PALM BEACH COUNTY FL-
347 PM EDT SAT MAY 14 2011

THE NATIONAL WEATHER SERVICE IN MIAMI HAS ISSUED A

* SIGNIFICANT WEATHER ADVISORY FOR...
  NORTH CENTRAL PALM BEACH COUNTY

* UNTIL 415 PM EDT

* AT 343 PM EDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
  LINE OF STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM 7 MILES
  SOUTHEAST OF PORT MAYACA TO 6 MILES NORTHEAST OF LION COUNTRY
  SAFARI...AND MOVING EAST AT 15 MPH.

* THE LINE OF STORMS WILL AFFECT...
  NORTH PALM BEACH GENERAL AIRPORT...
  AND SURROUNDING COMMUNITIES.

FREQUENT TO EXCESSIVE LIGHTNING...GUSTY WINDS FROM 45 T0 55 MPH...UP
TO NICKEL-SIZED HAIL...TORRENTIAL DOWNPOURS...OR A COMBINATION OF
THESE ARE POSSIBLE. LIGHTNING IS THE NUMBER ONE WEATHER RELATED
KILLER IN FLORIDA. TREES AND OPEN SHELTERS OFFER NO PROTECTION. 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.

STAY TUNED TO NOAA WEATHER RADIO AND OTHER LOCAL MEDIA FOR FURTHER
DETAILS OR UPDATES.

LAT...LON 2674 8032 2688 8063 2693 8062 2694 8062
      2696 8049 2696 8022 2675 8021
TIME...MOT...LOC 1947Z 270DEG 13KT 2694 8050 2679 8030

GREGORIA

Special weather statement, May 14, 3:52 PM EDT, 23 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MIAMI FL
352 PM EDT SAT MAY 14 2011

FLZ067-142030-
INLAND PALM BEACH COUNTY FL-
352 PM EDT SAT MAY 14 2011

THE NATIONAL WEATHER SERVICE IN MIAMI HAS ISSUED A

* SIGNIFICANT WEATHER ADVISORY FOR...
  SOUTHWESTERN AND CENTRAL PALM BEACH COUNTY

* UNTIL 430 PM EDT

* AT 347 PM EDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
  LINE OF STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM SOUTH BAY
  TO 12 MILES SOUTHEAST OF HOLEY LAND WILDLIFE MANAGEMENT AREA...AND
  MOVING EAST AT 15 MPH.

* THE LINE OF STORMS WILL AFFECT...
  SOUTH BAY...
  BELLE GLADE...
  OKEECHOBEE ROAD TO THE PALM BEACH AND BROWARD COUNTY LINE.

FREQUENT TO EXCESSIVE LIGHTNING...GUSTY WINDS FROM 45 T0 55 MPH...UP
TO NICKEL-SIZED HAIL...TORRENTIAL DOWNPOURS...OR A COMBINATION OF
THESE ARE POSSIBLE. LIGHTNING IS THE NUMBER ONE WEATHER RELATED
KILLER IN FLORIDA. TREES AND OPEN SHELTERS OFFER NO PROTECTION. 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.

RESIDENTS NEAR THE PATH OF SHOULD REMAIN ON THE ALERT FOR ADDITIONAL
STATEMENTS AND POSSIBLE WARNINGS.

LAT...LON 2633 8066 2674 8087 2671 8081 2671 8078
      2669 8074 2676 8074 2675 8071 2676 8070
      2676 8047 2633 8025
TIME...MOT...LOC 1951Z 270DEG 12KT 2667 8073 2633 8056

GREGORIA

The office that day

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

Issued	Product	Office	Counties	Lasted
May 14, 5:32 AM EDT	Rip Current Statement	MFL	Palm Beach	14 hr
May 14, 11:46 AM EDT	Special Weather Statement	MFL	Glades	29 min
May 14, 1:04 PM EDT	Special Weather Statement	MFL	Glades	41 min
May 14, 1:41 PM EDT	Special Weather Statement	MFL	Glades	49 min
May 14, 2:26 PM EDT	Special Weather Statement	MFL	Hendry	49 min
May 14, 2:40 PM EDT	Special Marine Warning	MFL		65 min
May 14, 3:05 PM EDT	Special Weather Statement	MFL	Palm Beach	40 min
May 14, 3:09 PM EDT	Special Weather Statement	MFL	Palm Beach	36 min
May 14, 3:18 PM EDT	Special Weather Statement	MFL	Broward	42 min
May 14, 3:47 PM EDT	Special Weather Statement	MFL	Palm Beach	28 min
May 14, 3:52 PM EDT	Special Weather Statement	MFL	Palm Beach	38 min
May 14, 4:33 PM EDT	Severe Thunderstorm Warning	MFL	Palm Beach	42 min
May 14, 4:53 PM EDT	Special Marine Warning	MFL		112 min
May 14, 4:57 PM EDT	Special Marine Warning	MFL		53 min
May 14, 5:10 PM EDT	Special Weather Statement	MFL	Broward	50 min
May 14, 5:44 PM EDT	Special Weather Statement	MFL	Broward	16 min
May 14, 6:03 PM EDT	Severe Thunderstorm Warning	MFL	Broward	57 min
May 14, 6:44 PM EDT	Special Weather Statement	MFL	Broward	46 min
May 14, 7:10 PM EDT	Special Weather Statement	MFL	Collier	35 min

Nearby

Severe Thunderstorm Warnings in Florida, 2011 Every severe thunderstorm warning in 2011

Sources

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