Alert archive / Florida / Severe Thunderstorm Warnings in 2008

Severe Thunderstorm Warning 48, NWS Melbourne, FL

June 11, 2008Indian River County, Saint Lucie County, Florida

NWS Melbourne, FL issued this severe thunderstorm warning at Jun 11, 2008, 4:29 PM EDT for Indian River County, Saint Lucie County, Florida. It was in force for 47 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: Jun 11, 2008, 4:29 PM EDT (20:29 UTC)
Expired: Jun 11, 2008, 5:16 PM EDT
In force: 47 min
Issued by: NWS Melbourne, FL
Area: Storm-based polygon

Counties Indian River County, FL, Saint Lucie County, FL

The radar

The Melbourne radar (KMLB), 70 km from the middle of the area, began a volume at 20:29 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
Jun 11, 4:42 PM EDT	HAIL 0.75	9 Wsw Fort Pierce, FL	REPORT FROM CARTERS GROCERY

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

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

Cape Canaveral, FL (KXMR), launched 12:00Z, 8.5 hours before the alert went out and 107 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: 177 J/kg
Mixed-layer CIN: -127 J/kg
Mixed-layer LCL: 1320 m above ground
0-6 km bulk shear: 17 kt
0-1 km storm-relative helicity: 0 m²/s²
0-3 km storm-relative helicity: 36 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.

000 
WUUS52 KMLB 112029
SVRMLB
FLC061-111-112130-
/O.NEW.KMLB.SV.W.0048.080611T2029Z-080611T2130Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MELBOURNE FL
429 PM EDT WED JUN 11 2008

THE NATIONAL WEATHER SERVICE IN MELBOURNE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHEASTERN INDIAN RIVER COUNTY IN FLORIDA.
  NORTH CENTRAL ST. LUCIE COUNTY IN FLORIDA.

* UNTIL 530 PM EDT

* AT 420 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS
  OF 60 MPH.  THIS STORM WAS LOCATED 10 MILES SOUTHWEST OF SAINT
  LUCIE AIRPORT...OR 11 MILES WEST OF WHITE CITY...AND MOVING
  NORTHEAST AT 18 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE...BUT ARE NOT LIMITED TO...
  FORT PIERCE...LAKEWOOD PARK...SAINT LUCIE VILLAGE...INDRIO...VERO
  BEACH HIGHLANDS...VERO BEACH SOUTH AND VERO BEACH

SEVERE THUNDERSTORMS PRODUCE DAMAGING WINDS IN EXCESS OF 58 MILES AN
HOUR AND OR LARGE DESTRUCTIVE HAIL. FREQUENT TO EXCESSIVE LIGHTNING
AND VERY HEAVY RAIN WILL ALSO BE POSSIBLE. IF THE STORM APPROACHES
YOU...SEEK SHELTER IN AN ENCLOSED BUILDING ON THE LOWEST FLOOR. KEEP
AWAY FROM WINDOWS.

LAT...LON 2743 8032 2733 8053 2751 8059 2767 8054
      2767 8038
TIME...MOT...LOC 2029Z 230DEG 16KT 2746 8047

$$



BRAGAW

2 follow-up statements

000 
WWUS52 KMLB 112051
SVSMLB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MELBOURNE FL
450 PM EDT WED JUN 11 2008

FLC061-111-112130-
/O.CON.KMLB.SV.W.0048.000000T0000Z-080611T2130Z/
ST. LUCIE FL-INDIAN RIVER FL-
450 PM EDT WED JUN 11 2008

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 530 PM EDT
FOR SOUTHEASTERN INDIAN RIVER AND NORTH CENTRAL ST. LUCIE COUNTIES...

AT 441 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN
EXCESS OF 60 MPH.  THIS STORM WAS LOCATED JUST SOUTH OF LAKEWOOD 
PARK...MOVING NORTHEAST AT 18 MPH TOWARD VERO BEACH HIGHLANDS.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
PARADISE PARK...GROVENOR ESTATES...PINE TREE PARK...SAINT LUCIE 
VILLAGE...STEVENS PARK...DIXIE HEIGHTS...VERO BEACH SOUTH AND VERO 
BEACH.

LAT...LON 2743 8032 2733 8053 2751 8059 2767 8054
      2767 8038
TIME...MOT...LOC 2050Z 230DEG 16KT 2752 8039

$$


BRAGAW

000 
WWUS52 KMLB 112116
SVSMLB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MELBOURNE FL
516 PM EDT WED JUN 11 2008

FLC061-111-112126-
/O.CAN.KMLB.SV.W.0048.000000T0000Z-080611T2130Z/
ST. LUCIE FL-INDIAN RIVER FL-
516 PM EDT WED JUN 11 2008

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN INDIAN RIVER AND
NORTH CENTRAL ST. LUCIE COUNTIES IS CANCELLED...

NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED THE SEVERE STORM
THAT PROMPTED THE WARNING HAD WEAKENED AND WAS NO LONGER CAPABLE OF
PRODUCING LARGE HAIL OR DAMAGING WINDS. AS A RESULT...THE WARNING HAS
BEEN CANCELLED. HOWEVER...HEAVY RAIN AND DANGEROUS LIGHTNING STRIKES
WILL CONTINUE TO BE POSSIBLE.

LAT...LON 2743 8032 2733 8053 2751 8059 2767 8054
      2767 8038
TIME...MOT...LOC 2116Z 230DEG 16KT 2759 8029

$$



BRAGAW

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 Jun 11, 2:28 PM EDT, 2 hours 1 minute earlier.

Area forecast discussion, Jun 11, 2:28 PM EDT, 2 hours 1 minute before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE MELBOURNE FL
228 PM EDT WED JUN 11 2008

...STORM COVERAGE AND INTENSITY TO INCREASE THROUGH THE LATE
AFTERNOON...

.DISCUSSION...

TONIGHT...LATE AFTERNOON SEA BREEZE INTERACTION CONVECTION OVER THE
INTERIOR WILL WIND DOWN DURING THE EVENING. DEEP LAYER RIDGING AND
LOWER LEVELS DECOUPLING WILL ALLOW THE WINDS TO BECOME LIGHT/CALM
AFTER MIDNIGHT.

THURSDAY...EXPECTING SEA AND LAKE OKEECHOBEE BREEZE CIRCULATIONS TO
DEVELOP BY EARLY AFTERNOON. INITIALLY SEA BREEZES MAY PRODUCE
ISOLATED SHOWERS ALONG THE SPACE AND TREASURE COASTS DURING THE
MORNING. STORMS WILL DEVELOP ALONG THE SEA BREEZE AS IT PUSHES
INLAND DURING THE MID AFTERNOON AND INCREASE IN COVERAGE LATE
AFTERNOON AS EAST AND WEST COAST SEA BREEZES BEGIN MERGING OVER THE
INTERIOR. COOL TEMPERATURES ALOFT...-8 TO 10C AT 500MB...MAY PRODUCE
SOME STRONGER STORMS MID TO LATE AFTERNOON ESPECIALLY WHERE EAST AND
WEST COAST SEA BREEZES INTERACT.

FRI THRU SUNDAY...LOW LEVEL RIDGE AXIS WILL BECOME ESTABILSHED TO
THE NORTH OF EC FL PRODUCING AN EASTERLY COMPONENT TO FLOW SURFACE
THROUGH STEERING LEVELS WITH STORM MOTION TOWARD THE WEST.
ATMOSPHERE WILL HAVE ADEQUATE MOISTURE AND INSTABILITY TO PRODUCE
SCT/CHC POPS EACH DAY WITH STORMS INITIALLY FORMING NEAR THE EAST
COAST THEN CHANCES INCREASING HEADING THROUGH THE AFTN AS ACTIVITY
MOVES/PROPAGATES THROUGH THE INTERIOR SECTIONS.

EXTENDED (PREVIOUS DISCUSSION)...A FRONTAL BOUNDARY ASCD WITH THE
MENTIONED UPR WAVE LOOKS TO SETTLE ACROSS N FL BY EARLY MON AND
PRESENCE OF BOUNDARY WL ACT TO INCREASE RAIN CHCS MAINLY ACROSS THE
NORTH AND CENTRAL. SCT THUNDER REMAINS A REASONABLE BET THROUGH
MIDWEEK CONSIDERING PRESENCE OF STALLED BOUNDARY OVER PENINSULA AND
SUITABLE MOISTURE.

&&

.AVIATION...EXPECTING MVFR/IFR CONDITIONS INTERIOR ROUTES AND TAF
SITES DUE TO AFTERNOON/EVENING THUNDERSTORMS. VFR CONDITIONS
MIDNIGHT TO JUST BEFORE SUNRISE WHEN LOCAL MVFR/IFR CONDITIONS ARE
FORECAST DUE TO PATCHES OF MIST/BR AND CEILINGS MAINLY OVER INTERIOR
ROUTES.

&&

.MARINE...WEATHER BUOYS RECORDING 1 TO 2 FOOT SEAS AND LIGHT
EASTERLY WINDS. WINDS WILL GO BACK TO LIGHT/CALM LATE EVENING AS SEA
BREEZE LOSES ITS INFLUENCE. LIGHT SOUTHERLY WINDS THURSDAY MORNING
BECOME EASTERLY AS SEA BREEZES FORM LATE MORNING EARLY AFTERNOON.
WINDS AND SEAS REMAIN WELL BELOW HIGHLIGHT CRITERIA NEXT SEVERAL
DAYS. STORMS REMAIN MAIN CONCERN TO MARINERS...BUT STORM COVERAGE
WILL BE DECREASING TO ISOLATED LATE WEEK INTO THE WEEKEND.

&&

.FIRE WEATHER...OUTSIDE OF LIGHTNING SPARKED BRUSH FIRES MIN RH
SHOULD NOT BE A FACTOR NEXT FEW DAYS.

&&

.PRELIMINARY POINT TEMPS/POPS...
DAB  71  87  72  88 /  20  50  20  30
MCO  72  90  72  90 /  30  60  30  40
MLB  73  87  72  88 /  30  50  20  30
VRB  72  88  72  88 /  30  50  20  30

&&

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

WIMMER/GLITTO/WEITLICH

Hazardous weather outlook, Jun 11, 9:15 AM EDT, 7 hours 14 minutes before

HAZARDOUS WEATHER OUTLOOK...UPDATED
NATIONAL WEATHER SERVICE MELBOURNE FL
915 AM EDT WED JUN 11 2008

AMZ550-552-555-570-572-575-FLZ041-044>047-053-054-058-059-064-141-
144-147-111900-
COASTAL WATERS FROM FLAGLER BEACH TO VOLUSIA BREVARD COUNTY LINE
OUT 20 NM-
COASTAL WATERS FROM VOLUSIA BREVARD COUNTY LINE TO SEBASTIAN
INLET OUT 20 NM-
COASTAL WATERS FROM SEBASTIAN INLET TO JUPITER INLET OUT 20 NM-
WATERS FROM FLAGLER BEACH TO VOLUSIA BREVARD COUNTY LINE 20 TO
60 NM OFFSHORE-
WATERS FROM VOLUSIA BREVARD COUNTY LINE TO SEBASTIAN INLET 20 TO
60 NM OFFSHORE-
WATERS FROM SEBASTIAN INLET TO JUPITER INLET 20 TO 60 NM OFFSHORE-
INLAND VOLUSIA-NORTHERN LAKE-ORANGE-SEMINOLE-SOUTHERN BREVARD-
OSCEOLA-INDIAN RIVER-OKEECHOBEE-ST. LUCIE-MARTIN-COASTAL VOLUSIA-
SOUTHERN LAKE-NORTHERN BREVARD-
915 AM EDT WED JUN 11 2008

THIS HAZARDOUS WEATHER OUTLOOK IS FOR EAST CENTRAL FLORIDA.

.DAY ONE...TODAY AND TONIGHT.

...THUNDERSTORM IMPACT...
AN UPPER LEVEL LOW OFF THE NORTHEAST FLORIDA COAST IN COMBINATION
WITH DAYTIME HEATING...PLENTIFUL MOISTURE AND THE DEVELOPING EAST
COAST SEA BREEZE BOUNDARY WILL GENERATE SCATTERED TO NUMEROUS
SHOWERS AND THUNDERSTORMS THIS AFTERNOON INTO THE EARLY EVENING
HOURS. INITIAL ACTIVITY MAY DEVELOP ALONG THE EAST COAST SEA
BREEZE ACROSS THE COASTAL COUNTIES DURING THE EARLY AFTERNOON.

BY LATE AFTERNOON...MUCH OF THE THUNDERSTORM ACTIVITY IS EXPECTED
TO CONCENTRATED OVER INTERIOR SECTIONS OF EAST CENTRAL FLORIDA AS
THE EAST COAST SEA BREEZE AND THUNDERSTORM OUTFLOW BOUNDARIES
INTERACT TO TRIGGER ADDITIONAL STORMS. THE PRIMARY THUNDERSTORM
HAZARDS WILL LOCALLY HEAVY RAIN...FREQUENT LIGHTNING...AND GUSTY
WINDS WITH THE STRONGER STORMS. A FEW STORMS MAY REACH SEVERE
LIMITS WITH STRONG DOWNBURST WIND GUSTS AND HAIL.

...FLOOD IMPACT...
STORM MOTION WILL BE SLOW TODAY AT ONLY 5 TO 10 MPH WITH LOCALLY
HEAVY RAINFALL AMOUNTS OF TWO TO THREE INCHES EXPECTED WITH
STRONGER STORMS. THE HEAVY RAIN MAY CAUSE MINOR FLOODING OF
URBAN...LOW LYING AND POOR DRAINAGE AREAS.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY.
SCATTERED THUNDERSTORMS ARE EXPECTED EACH AFTERNOON THROUGH THE
END OF THE WEEK...WITH ACTIVITY FOCUSING ACROSS FAR INTERIOR
SECTIONS BY SATURDAY AS DRIER ONSHORE FLOW IS EXPECTED. A TROUGH
OF LOW PRESSURE ACROSS THE SOUTHEAST STATES NEXT WEEK WILL
INCREASE SHOWER AND THUNDERSTORMS CHANCES AGAIN WITH STEERING FLOW
TOWARD THE EAST COAST.

.SPOTTER INFORMATION STATEMENT...

SPOTTERS ARE REQUESTED TO MONITOR THE WEATHER AND SELF ACTIVATE
IF NEEDED.

VOLKMER/WIMMER

In the hours before

Special weather statement, Jun 11, 3:08 PM EDT, 1 hour 21 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MELBOURNE FL
308 PM EDT WED JUN 11 2008

FLZ059-064-112000-
MARTIN-ST. LUCIE-
308 PM EDT WED JUN 11 2008

...STRONG THUNDERSTORMS AFFECTING NORTHWESTERN MARTIN COUNTY...SOUTH
CENTRAL ST. LUCIE COUNTY...

AT 307 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG STORM OVER NORTHWESTERN MARTIN COUNTY...MOVING NORTHEAST AT 5
MPH.

THE PRIMARY THREAT WILL BE CLOUD TO GROUND LIGHTNING STRIKES AND
GUSTY WINDS OF 40 TO 45 MPH...WHICH MAY CAUSE UNSECURED OBJECTS TO
BLOW AROUND. HEAVY RAINFALL WILL TEMPORARILY REDUCE VISIBILITY. SEEK
SHELTER INDOORS UNTIL THE STORM PASSES.

A BRIEF PERIOD OF SMALL HAIL...PEA TO DIME SIZE...WILL ALSO BE
POSSIBLE IN LOCALIZED AREAS.

TORRENTIAL RAINFALL CAN BE EXPECTED...CAUSING TEMPORARY PONDING ON
SOME ROADS AND MINOR FLOODING OF POOR DRAINAGE AREAS. MOTORISTS
SHOULD SLOW DOWN IN HEAVY RAINFALL TO REDUCE THE RISK OF HYDROPLANING
AND LEAVE SAFE DISTANCE BETWEEN OTHER VEHICLES.

WEITLICH

Special weather statement, Jun 11, 3:38 PM EDT, 51 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MELBOURNE FL
338 PM EDT WED JUN 11 2008

FLZ058-059-112030-
OKEECHOBEE-ST. LUCIE-
338 PM EDT WED JUN 11 2008

...A LARGE STORM WITH EXCESSIVE LIGHTNING OVER SOUTHWESTERN SAINT
LUCIE COUNTY IS BUILDING TOWARD OKEECHOBEE COUNTY...

AT 337 PM EDT...LIGHTNING DETECTION EQUIPMENT AT THE NATIONAL WEATHER
SERVICE INDICATED A STORM WITH EXCESSIVE LIGHTNING 14 MILES SOUTHEAST
OF COUNTRY HILLS ESTATES...BUILDING TOWARD THE NORTHWEST AT 10 MPH.
THE STORM WILL CROSS STATE ROAD 70 NEAR THE SAINT LUCIE-OKEECHOBEE
COUNTY LINE.

THIS STORM RECENTLT PRODUCED 107 CLOUD TO GROUND STRIKES IN A 5
MINUTE PERIOD...OR OVER 20 CLOUD TO GROUND STRIKES PER MINUTE.

THIS STORM IS CAPABLE OF PRODUCING EXCESSIVE LIGHTNING STRIKES...
DEFINED AS 12 OR MORE CLOUD TO GROUND STRIKES PER MINUTE. IF YOU ARE
OUTDOORS...TAKE SHELTER IN A BUILDING OR HARD TOPPED AUTOMOBILE. OPEN
SHELTERS FOUND IN PARKS...ON BEACHES OR GOLF COURSES OFFER NO
PROTECTION FROM THE DANGERS OF LIGHTNING. STAY AWAY FROM TREES.

LIGHTNING IS THE NUMBER ONE WEATHER RELATED KILLER IN FLORIDA.

MOST PEOPLE WHO ARE STRUCK BY LIGHTNING IN FLORIDA ARE STRUCK EITHER
PRIOR TO THE RAIN REACHING THEIR LOCATION...OR AFTER THE RAIN HAS
ENDED.

CRISTALDI

Local storm report, Jun 11, 4:29 PM EDT, 0 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MELBOURNE FL
429 PM EDT WED JUN 11 2008

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

0405 PM     HAIL             5 E OKEECHOBEE          27.24N 80.75W
06/11/2008  M0.70 INCH       OKEECHOBEE         FL   TRAINED SPOTTER

            A SHORT DURATION OF SMALL HAIL WITH SOME DIME SIZE.

&&

MRT

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 11, 3:45 PM EDT	Severe Thunderstorm Warning	MLB	Okeechobee, Saint Lucie	47 min
Jun 11, 5:02 PM EDT	Areal Flood Advisory	MLB	Volusia	88 min
Jun 11, 5:15 PM EDT	Areal Flood Advisory	MLB	Osceola	90 min
Jun 11, 6:24 PM EDT	Areal Flood Advisory	MLB	Lake, Orange, Seminole, Volusia	2 hr

Nearby

Severe Thunderstorm Warnings in Florida, 2008 Every severe thunderstorm warning in 2008

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.