Alert archive / Florida / Severe Thunderstorm Warnings in 2009
Severe Thunderstorm Warning 42, NWS Melbourne, FL
NWS Melbourne, FL issued this severe thunderstorm warning at Jun 6, 2009, 11:42 AM EDT for Orange County, Florida. It was in force for 35 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 6, 2009, 11:42 AM EDT (15:42 UTC)
- Expired
- Jun 6, 2009, 12:17 PM EDT
- In force
- 35 min
- Issued by
- NWS Melbourne, FL
- Area
- Storm-based polygon
County Orange County, FL
The radar
The Melbourne radar (KMLB), 99 km from the middle of the area, began a volume at 15:43 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 6, 11:45 AM EDT | HAIL 0.75 | Ocoee, FL | PUBLIC REPORT RELAYED BY CHANNEL 13 NEWS |
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, 3.7 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.
- Mixed-layer CAPE
- 471 J/kg
- Mixed-layer CIN
- -45 J/kg
- Mixed-layer LCL
- 980 m above ground
- 0-6 km bulk shear
- 13 kt
- 0-1 km storm-relative helicity
- 42 m²/s²
- 0-3 km storm-relative helicity
- 97 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000
WUUS52 KMLB 061542
SVRMLB
FLC095-061630-
/O.NEW.KMLB.SV.W.0042.090606T1542Z-090606T1630Z/
BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MELBOURNE FL
1142 AM EDT SAT JUN 6 2009
THE NATIONAL WEATHER SERVICE IN MELBOURNE HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
WEST CENTRAL ORANGE COUNTY IN FLORIDA
* UNTIL 1230 PM EDT.
* AT 1141 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING NICKEL SIZE HAIL. THIS
STORM WAS LOCATED NEAR OCOEE...AND MOVING NORTHEAST AT 15 MPH.
* OTHER LOCATIONS IN THE WARNING INCLUDE...BUT ARE NOT LIMITED TO...
ORLOVISTA...PINE HILLS...LOCKHART AND FAIRVIEW SHORES
PRECAUTIONARY/PREPAREDNESS ACTIONS...
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 2867 8146 2864 8145 2864 8139 2856 8134
2843 8160 2854 8166 2860 8165
TIME...MOT...LOC 1542Z 246DEG 13KT 2855 8155
$$
JP2 follow-up statements
000
WWUS52 KMLB 061556
SVSMLB
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MELBOURNE FL
1156 AM EDT SAT JUN 6 2009
FLC095-061630-
/O.CON.KMLB.SV.W.0042.000000T0000Z-090606T1630Z/
ORANGE-
1156 AM EDT SAT JUN 6 2009
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1230 PM EDT
FOR WEST CENTRAL ORANGE COUNTY...
AT 1155 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING NICKEL SIZE HAIL.
THIS STORM WAS LOCATED NEAR OCOEE...MOVING EAST AT 15 MPH.
OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
CLARCONA...ORLOVISTA...PINE HILLS...AND EATONVILLE
PRECAUTIONARY/PREPAREDNESS ACTIONS...
IN ADDITION TO LARGE HAIL AND DAMAGING WINDS...CONTINUOUS CLOUD TO
GROUND LIGHTNING IS OCCURRING WITH THIS STORM. MOVE INDOORS
IMMEDIATELY LIGHTNING IS ONE OF NATURES NUMBER ONE KILLERS.
REMEMBER...IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE
STRUCK BY LIGHTNING.
&&
LAT...LON 2867 8146 2864 8145 2864 8139 2856 8134
2843 8160 2854 8166 2860 8165
TIME...MOT...LOC 1555Z 246DEG 13KT 2857 8150
$$
JP000
WWUS52 KMLB 061617
SVSMLB
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MELBOURNE FL
1217 PM EDT SAT JUN 6 2009
FLC095-061627-
/O.CAN.KMLB.SV.W.0042.000000T0000Z-090606T1630Z/
ORANGE-
1217 PM EDT SAT JUN 6 2009
...THE SEVERE THUNDERSTORM WARNING FOR WEST CENTRAL ORANGE COUNTY 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 2867 8146 2864 8145 2864 8139 2856 8134
2843 8160 2854 8166 2860 8165
TIME...MOT...LOC 1617Z 246DEG 13KT 2860 8142
$$
JPWhat 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 6, 8:45 AM EDT, 2 hours 57 minutes earlier.
Area forecast discussion, Jun 6, 8:45 AM EDT, 2 hours 57 minutes before
EAST CENTRAL FLORIDA FORECAST DISCUSSION NATIONAL WEATHER SERVICE MELBOURNE FL 845 AM EDT SAT JUN 6 2009 .DISCUSSION... ...NUMEROUS SHOWERS AND LIGHTNING STORMS TODAY WITH THE POTENTIAL FOR STRONG TO SEVERE STORMS... CURRENT...ANOMALOUSLY COOL POCKET OF AIR ALOFT OVER PENINSULA ASCD WITH DRIFTING UPR LOW. MORNING SOUNDING DATA FROM TBW/XMR CONFIRM MID LEVEL TEMPS RUNNING ABOUT 2-3C BLOW NORMAL WHICH IS SIGNIFICANT ESPECIALLY FOR JUNE. VERY UNSTABLE CONDITIONS FROM THIS MORNING AND INTO AFTN WILL LEAD TO SCT STRONG TO ISOLD SEVERE STORMS WITH HAIL AND THUNDERSTORM WINDS THE PRIMARY HAZARDS. AN EARLY ROUND OF STORMS WILL MOVE INTO THE CORRIDOR LATER THIS MORNING AND ADDITIONAL DEVELOPMENT WILL CONTINUE AS MID DAY APPROACHES ACROSS THE REMAINDER OF THE AREA. THE MID-UPPER TROUGH EXTENDING FROM THE ERN GOMEX INTO THE NERN GULF COAST AND WRN/NRN FL HAS BECOME CUTOFF FROM THE NRN STREAM FLOW. VORT SPOKES RIDING AROUND FEATURE HAVE BEEN FIRING UP CONVECTION OVER WRN FL AND THE ADJCT GOMEX SINCE THE OVERNIGHT. ANOTHER ACTIVE DAY IS ON TAP FOR THE CWA AS UPPER TROUGH/LOW SLOWLY DROPS ESE OVER FL. DEEP LYR SSW/SW FLOW WILL REMAIN IN PLACE... WHICH WILL FAVOR THE PENINSULA FOR +TS. DRY AIR WRAPPING AROUND THE SOUTHERN PERIPHERY THE MID-UPR LOW MAY TRY AND PULL NEWD ACROSS THE PENINSULA...WHICH WILL ENHANCE DIURNAL INSTABILITY/SVR POTENTIAL. WITH MODERATE RISKS OF SVR HAIL/WIND IN CURRENT HAZARDOUS OUTLOOK WL FRESHEN UP ZONE FORECAST SHORTLY. && ** MODIFIED PREV DISC ** .AVIATION... TS SHOULD REACH THE WRN AERODROMES (LEE/ISM) AROUND 14-16Z BEFORE SPREADING EWD TO THE MCO-ORL-SFB CORRIDOR AN HR OR SO LATER...AND THEN REACHING THE EAST COAST BY AROUND 17-18Z. WHILE NOT MENTIONED EXPLICITLY IN THE TAFS...THREAT FOR STRONG TS WIND GUSTS (AOA 35KT) SHOULD BE A BIT HIGHER TODAY. && .MARINE...OFFSHORE MOVING TS REMAIN DURG THE AFTN AND EARLY EVENING REMAIN PRIMARY MARINE CONCERN TODAY. AS MENTIONED EARLIER POTENTIAL EXISTS FOR STRONG/SVR TS TO CARRY EWD ACROSS THE INTRACOASTAL WATERS AND INTO THE ADJCT ATLC. ASIDE FROM THIS...STILL LOOKING AT SSW/SW WINDS 10-15KT WITH SEAS 2-3FT NR SHORE AND 3-4FT OFFSHORE. && .MLB WATCHES/WARNINGS/ADVISORIES... FL...NONE. AM...NONE. && JP/RW
Hazardous weather outlook, Jun 6, 3:35 AM EDT, 8 hours 7 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE MELBOURNE FL 335 AM EDT SAT JUN 6 2009 AMZ550-552-555-570-572-575-FLZ041-044>047-053-054-058-059-064-141- 144-147-062100- 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- 335 AM EDT SAT JUN 6 2009 THIS HAZARDOUS WEATHER OUTLOOK IS FOR EAST CENTRAL FLORIDA. .DAY ONE...TODAY AND TONIGHT. ...INCREASING THREAT FOR SEVERE STORMS TODAY... ...THUNDERSTORM IMPACT... AN UPPER LEVEL TROUGH EXTENDING FROM THE EASTERN GULF OF MEXICO INTO NORTH FLORIDA WILL SLOWLY DROP SOUTHEASTWARD TODAY THROUGH TONIGHT. A DEEP LAYER SOUTHWEST FLOW OF MOISTURE COUPLED WITH A FAVORABLE UPPER LEVEL LIFT ASSOCIATED WITH THE TROUGH WILL PRODUCE NUMEROUS LIGHTNING STORMS ACROSS EAST CENTRAL FLORIDA FROM LATE THIS MORNING THROUGHOUT THE AFTERNOON AND EARLY EVENING. THE STORMS WILL MOVE NORTHEAST AT 20 TO 25 MPH...AND DUE TO THE PRESENCE OF COOL AIR ALOFT...WITH HAVE THE POTENTIAL TO PRODUCE LARGE HAIL AND DAMAGING WIND GUSTS. IN ADDITION...FREQUENT TO EXCESSIVE LIGHTNING WILL ACCOMPANY THE STRONGEST STORMS...ALONG WITH TORRENTIAL RAINFALL. ISOLATED TORNADOES ARE ALSO POSSIBLE. PERSONS IN EAST CENTRAL FLORIDA SHOULD MONITOR THE WEATHER CLOSELY TODAY. AT THE FIRST SIGN OF THREATENING WEATHER...HALT ANY OUTDOOR ACTIVITY AND HEAD INDOORS. DEATHS AND INJURIES FROM LIGHTNING STRIKES INCREASE MARKEDLY IN JUNE. DONT BECOME A STATISTIC ...MARINE THUNDERSTORM GUST IMPACT... AGAIN TODAY...ANY STORMS THAT FORM OVER LAND WILL PUSH RAPIDLY NORTHEAST ACROSS THE INTRACOASTAL WATERWAY AND NEAR SHORE ATLANTIC DURING THE AFTERNOON AND EARLY EVENING. STRONG GUSTY WINDS IN EXCESS OF 35 KNOTS...LOCALLY HIGHER SEAS...FREQUENT TO EXCESSIVE CLOUD TO WATER LIGHTNING WILL OCCUR WITH THE STRONGEST STORMS... AND THERE IS THE THREAT FOR ISOLATED WATERSPOUTS. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY. COVERAGE OF SHOWERS AND LIGHTNING STORMS WILL REMAIN HIGHER THAN NORMAL ON SUNDAY AS THE UPPER LEVEL TROUGH REMAINS OVERHEAD. THE CHANCE FOR SHOWERS AND STORMS WILL RETURN TO NORMAL THROUGHOUT NEXT WEEK AS A HIGH PRESSURE RIDGE GRADUALLY BUILDS ACROSS FLORIDA. .SPOTTER INFORMATION STATEMENT... SPOTTERS ARE REQUESTED TO MONITOR THE WEATHER AND SELF ACTIVATE IF NEEDED. CRISTALDI
In the hours before
Special weather statement, Jun 6, 10:48 AM EDT, 54 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE MELBOURNE FL 1048 AM EDT SAT JUN 6 2009 FLZ041-044>046-141-144-061545- COASTAL VOLUSIA COUNTY-INLAND VOLUSIA COUNTY-NORTHERN LAKE COUNTY-ORANGE-SEMINOLE-SOUTHERN LAKE COUNTY- 1048 AM EDT SAT JUN 6 2009 ...A FEW STRONG THUNDERSTORMS TO AFFECT LAKE COUNTY...ORANGE COUNTY...SEMINOLE COUNTY...VOLUSIA COUNTY... AT 1045 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A BROKEN LINE OF STORMS FROM 7 MILES NORTHEAST OF DE LAND TO OCOEE...MOVING NORTHEAST AT 15 MPH. LOCATIONS IN THE PATH OF THE STORMS INCLUDE WINDERMERE ...SANFORD...ALTAMONTE SPRINGS...DE BARY. 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 STORMS PASS. A BRIEF PERIOD OF SMALL HAIL...PEA TO DIME SIZE...WILL ALSO BE POSSIBLE IN LOCALIZED AREAS. JP
Special weather statement, Jun 6, 11:39 AM EDT, 3 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE MELBOURNE FL 1139 AM EDT SAT JUN 6 2009 FLZ041-045-046-141-144-147-061630- COASTAL VOLUSIA COUNTY-INLAND VOLUSIA COUNTY-NORTHERN BREVARD COUNTY-ORANGE-SEMINOLE-SOUTHERN LAKE COUNTY- 1139 AM EDT SAT JUN 6 2009 ...STRONG STORMS TO AFFECT NORTHWESTERN BREVARD COUNTY...SOUTH LAKE COUNTY...ORANGE COUNTY...SEMINOLE COUNTY...VOLUSIA COUNTY... AT 1135 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A BROKEN LINE OF STRONG STORMS FROM OSTEEN TO SANFORD...APOPKA AND CLERMONT...MOVING EAST AT 15 MPH. LOCATIONS IN THE PATH OF THE STORMS INCLUDE WINDEREMERE...METRO ORLANDO...AND THE THEME PARKS. 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. JP
The office that day
Everything else NWS Melbourne, FL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 6, 12:25 PM EDT | Severe Thunderstorm Warning | MLB | Orange | 28 min |
| Jun 6, 3:49 PM EDT | Severe Thunderstorm Warning | MLB | Brevard, Osceola | 56 min |
| Jun 6, 4:10 PM EDT | Severe Thunderstorm Warning | MLB | Brevard, Osceola | 65 min |
| Jun 6, 4:11 PM EDT | Special Marine Warning | MLB | 109 min | |
| Jun 6, 6:43 PM EDT | Areal Flood Advisory | MLB | Brevard, Osceola | 2 hr |
Nearby
Severe Thunderstorm Warnings in Florida, 2009Every severe thunderstorm warning in 2009
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.