Alert archive / Florida / Severe Thunderstorm Warnings in 2000

Severe Thunderstorm Warning 19, NWS Melbourne, FL

May 9, 2000Osceola County, Florida

NWS Melbourne, FL issued this severe thunderstorm warning at May 9, 2000, 5:31 PM EDT for Osceola County, Florida. It was in force for 59 min. 1 report came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued: May 9, 2000, 5:31 PM EDT (21:31 UTC)
Expired: May 9, 2000, 6:30 PM EDT
In force: 59 min
Issued by: NWS Melbourne, FL
Area: Whole counties

County Osceola County, FL

The radar

The Melbourne radar (KMLB), 49 km from the middle of the area, began a volume at 21:33 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 9, 5:45 PM EDT	Hail 0.75	Kissimmee, FL	Dime size hail fell in Poinciana.

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.

The nearest sounding before it

Cape Canaveral, FL (KXMR), launched 12:00Z, 9.5 hours before the alert went out and 78 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: 870 J/kg
Mixed-layer CIN: -13 J/kg
Mixed-layer LCL: 679 m above ground
0-6 km bulk shear: 3 kt
0-1 km storm-relative helicity: -3 m²/s²
0-3 km storm-relative helicity: 21 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 092133
SVRMLB
FLC097-092230-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MELBOURNE FL
531 PM EDT TUE MAY 9 2000

THE NATIONAL WEATHER SERVICE IN MELBOURNE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHWESTERN OSCEOLA COUNTY
  ...IN EAST CENTRAL FLORIDA

* UNTIL 630 PM EDT.

* AT 528 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM OVER INTERCESSION CITY...MOVING EAST AT 10 MPH.

* THE SEVERE THUNDERSTORM WILL BE...
  NEAR KISSIMMEE AT 545 PM EDT
  NEAR BUENA VENTURA LAKES AT 550 PM EDT
  NEAR SAINT CLOUD AT 610 PM EDT

SEVERE THUNDERSTORMS PRODUCE DAMAGING WINDS IN EXCESS OF 58 MILES AN
HOUR...DESTRUCTIVE HAIL...DEADLY LIGHTNING AND VERY HEAVY RAIN. IF
THE STORM APPROACHES YOU...MOVE TO AN INTERIOR ROOM ON THE LOWEST
FLOOR.

VERY LARGE HAIL IS POSSIBLE WITH THIS SEVERE STORM. IF YOU ARE IN ITS
PATH...PUT YOUR CAR IN A GARAGE AND MOVE TO A STURDY BUILDING AWAY
FROM WINDOWS.

$$

LAT...LON 2834 8161 2816 8159 2816 8115 2835 8115

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 May 9, 3:00 PM EDT, 2 hours 31 minutes earlier.

Area forecast discussion, May 9, 3:00 PM EDT, 2 hours 31 minutes before

EAST CENTRAL FLORIDA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE MELBOURNE FL
300 PM EDT TUE MAY 9 2000

CURRENTLY...CLOUD PATTERNS INDICATE THE SUBTROPICAL RIDGE AXIS
BISECTING THE FLORIDA PENINSULA. TROPICAL JET MAX OVER THE S
FLORIDA STRAITS HELPING TO ENHANCE SCATTERED RW OVER INTERIOR AND NE
PENINSULA.  DEWPOINTS IN THE 60S AND SEA SURFACE TEMPS IN THE M/U
70S...THE WET SEASON APPEARS TO BE KNOCKING ON THE DOOR.

SHORT TERM...MODELS ARE IN DECENT AGREEMENT WITH THE MOTION OF
THE BROAD LOW PRESSURE SYSTEM ACROSS NEW ENGLAND...THE GREAT
LAKES... AND THE UPPER MIDWEST.  THE SYSTEM WILL PULL A COLD FRONT
ACROSS THE MISSISSIPPI AND RED RIVER VALLEYS BEFORE IT STALLS N OF
THE PANHANDLE. THE SFC-H70 TROF WILL SUPRESS THE SUBTROPICAL RIDGE
AXIS DOWN TO THE N BAHAMAS/S FL PENINSULA.  RESULTING SW FLOW FAVORS
ABV CLIMO TEMPS FOR THE CWA...AS THE FOUS/FAN NUMBERS INDICATE.
TEMPS COULD BREAK THE 90 DEGREE MARK OVER THE SRN INTERIOR.  PW
VALUES ARE A BIT LOW...BUT HIGH ENOUGH TO SUPPORT SCT POPS ON WED.
BY THU...A DRY SLOT ACROSS NE GOMEX WILL DRIFT ACROSS THE PENINSULA
AS SFC-H70 WINDS TURN TO THE W/NW.  MOISTURE VALUES WILL STILL HIGH
ENOUGH TO SUPPORT PRECIP...MAINLY OVER THE SOUTH.

EXTENDED...RIDGE AXIS WILL BEGIN TO DRIFT BACK TO THE NORTH AS THE
FRONT DISSIPATES ON FRI.  MEDIUM RANGE MODELS INDICATE STEERING
WINDS VEERING TO THE NE ON FRI AND E/SE BY SAT...WITH MRH VALUES AT
OR BELOW 50 PERCENT.  PRECIP CHANCES TOO LOW TO MENTION IN THE
EXTENDED WITH THIS TYPE OF WX PATTERN.

MARINE...WITH THE SUBTROPICAL HIGH SETTLING INTO ITS SUMMER
POSITION...WINDS AND SEAS WILL REMAIN WELL BELOW ANY NEED FOR
HIGHLIGH7TS.

PRELIMINARY NUMBERS...
DAB BB 065/088 064/089 066 222
MCO BB 067/090 067/091 069 222
MLB BB 068/088 067/088 068 132

.MLB...NONE.

PUBLIC/MARINE...BRAGAW
AVIATION/FIRE WEATHER...TROUTMAN

In the hours before

Special weather statement, May 9, 12:15 PM EDT, 5 hours 16 minutes before

AMZ550-555-570-575-FLZ041-044>047-053-054-058-059-064-091915-

EAST CENTRAL FLORIDA HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE MELBOURNE FL
1215 PM EDT TUE MAY 9 2000

WIDELY SCATTERED SHOWERS AND A FEW THUNDERSTORMS ARE EXPECTED TO
DEVELOP ALONG THE EAST COAST SEA BREEZE AS IT PUSHES INLAND THIS
AFTERNOON.  ADDITIONAL STORMS WILL DEVELOP AS IT INTERACTS WITH LAKE
BREEZES AND THE WEST COAST SEA BREEZE.  ALL STORM ACTIVITY WILL MOVE
NORTHEAST AROUND 15 MPH...BRINGING SOME STORMS TOWARD THE COAST
LATE THIS AFTERNOON AND THIS EVENING.

A SLIGHTLY BETTER CHANCE FOR SHOWERS AND THUNDERSTORMS WILL OCCUR
WEST OF A LINE FROM CAPE CANAVERAL TO LAKE OKEECHOBEE...WHERE GREATER
MOISTURE EXISTS. ANY THUNDERSTORMS TODAY WILL BE CAPABLE OF PRODUCING
CLOUD TO GROUND LIGHTNING STRIKES...GUSTY WINDS UP TO 35 MPH...AND
LOCALLY HEAVY DOWNPOURS.

IN ADDITION...DUE TO CONTINUED DRY VEGETATION AND LOW RELATIVE
HUMIDITY...THERE IS A HIGH FIRE DANGER IN LAKE...WEST ORANGE...AND
NORTHWEST OSCEOLA COUNTIES.  CLOUD TO GROUND LIGHTNING MAY IGNITE
WILDFIRES IN THE VICINITY OF THUNDERSTORMS.  PREVAILING SOUTH TO
SOUTHWEST WINDS WOULD SPREAD ANY FIRES THAT DO IGNITE TO THE NORTH
AND NORTHEAST.

BRAGAW

Local storm report, May 9, 3:49 PM EDT, 1 hour 42 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MELBOURNE, FL
349 PM EDT TUE MAY 9 2000

TIME(EDT)  .....CITY LOCATION.....STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....
2
0346 PM    4SW TITUSVILLE            FL   .88 INCH HAIL
05/09/00   BREVARD                        REPORTED BY PUBLIC

TT

Local storm report, May 9, 4:15 PM EDT, 1 hour 16 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MELBOURNE, FL
415 PM EDT TUE MAY 9 2000

TIME(EDT)  .....CITY LOCATION.....STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....
M
0412 PM    PORT SAINT JOHN           FL   1.00 INCH HAIL
05/09/00   BREVARD

Local storm report, May 9, 4:21 PM EDT, 1 hour 10 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MELBOURNE, FL
421 PM EDT TUE MAY 9 2000

TIME(EDT)  .....CITY LOCATION.....STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0400 PM    2N GROVELAND              FL   WIND DAMAGE
05/09/00   LAKE                           LAW ENFORCEMENT REPORTED
                                          LARGE TREE LIMB AND POWER
                                          LINES BLOWN DOWN

TT

Local storm report, May 9, 4:22 PM EDT, 1 hour 9 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MELBOURNE, FL
422 PM EDT TUE MAY 9 2000

TIME(EDT)  .....CITY LOCATION.....STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0412 PM    PORT SAINT JOHN           FL   1.00 INCH HAIL
05/09/00   BREVARD                         REPORTED BY TRAINED SPOTTER

TT

The office that day

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

Issued	Product	Office	Counties	Lasted
May 9, 2:23 PM EDT	Severe Thunderstorm Warning	MLB	Lake	67 min
May 9, 3:17 PM EDT	Severe Thunderstorm Warning	MLB	Lake	58 min
May 9, 3:38 PM EDT	Severe Thunderstorm Warning	MLB	Brevard	37 min
May 9, 4:14 PM EDT	Severe Thunderstorm Warning	MLB	Brevard	61 min
May 9, 5:05 PM EDT	Severe Thunderstorm Warning	MLB	Orange	55 min

Nearby

Severe Thunderstorm Warnings in Florida, 2000 Every severe thunderstorm warning in 2000

Sources

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