Alert archive / Florida / Severe Thunderstorm Warnings in 1999

Severe Thunderstorm Warning 57, NWS Melbourne, FL

May 9, 1999Orange County, Florida

NWS Melbourne, FL issued this severe thunderstorm warning at May 9, 1999, 6:16 PM EDT for Orange County, Florida. It was in force for 59 min. 2 reports 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, 1999, 6:16 PM EDT (22:16 UTC)
Expired
May 9, 1999, 7:15 PM EDT
In force
59 min
Issued by
NWS Melbourne, FL
Area
Whole counties

County Orange County, FL

What was reported inside it

TimeReportWhereRemark
May 9, 6:28 PM EDTHail 0.75Orlando, FL
May 9, 6:51 PM EDTHail 1Orlando, FL

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

Tampa Bay, FL (KTBW), launched 12:00Z, 10.3 hours before the alert went out and 139 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, Tampa Bay, FL at 12:00Z on 1999-05-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 929 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, Tampa Bay, FL at 12:00Z on 1999-05-09The 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
929 J/kg
Mixed-layer CIN
-130 J/kg
Mixed-layer LCL
1185 m above ground
0-6 km bulk shear
10 kt
0-1 km storm-relative helicity
8 m²/s²
0-3 km storm-relative helicity
16 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

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, 2:55 PM EDT, 3 hours 21 minutes earlier.

Area forecast discussion, May 9, 2:55 PM EDT, 3 hours 21 minutes before
EAST CENTRAL FLORIDA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE MELBOURNE FL
255 PM EDT SUN MAY 9 1999

CURRENTLY...A FEW STRONG TO SEVERE TSTMS STARTING TO INFRINGE UPON
EC FL AND SRN HALF OF CWA IN A SVR TSTM WATCH THROUGH 8 PM. STORMS
WILL MOVE TOWARD E COAST THROUGH LATE AFTERNOON AND INCREASE AS SEA
BREEZE BOUNDARIES INTERACT. A FEW STORMS ALSO DEVELOPING OVER NRN
SECTIONS ALONG REMNANTS OF FRONTAL BOUNDARY BUT WITH LOWER DEW
POINTS FILTERING INTO THIS REGION AM THINKING COVERAGE OF STORMS
WILL STAY LOWER THERE.

TONIGHT...STORMS WILL LINGER INTO WELL EVE HOURS AS THEY MOVE TOWARD
E COAST. PATCHY FOG POSSIBLE LATE NIGHT AS CLOUDS DECREASE AND WINDS
GO LIGHT...ESPECIALLY AREAS THAT RECEIVE RAIN TODAY.

MON...SHORT WAVE TROUGH DROPS THROUGH SOUTHEAST AND BECOMES CUTOFF
MON NIGHT. COLD POOL OF AIR AT 500MB...STEEP LAPSE RATES COMBINING
WITH LOW LEVEL MOISTURE AND SEA BREEZE FOCUSING WARRANT GOING A
LITTLE ABOVE GUIDANCE POPS FOR THUNDERSTORMS. SET UP LOOKS GOOD FOR
MAINLY HAIL AND WIND EVENTS.

TUE THROUGH FRI...AVN/MRF CUT OFF SHORT WAVE VICINITY OF PENINSULA
WITH 500MB TEMPERATURES AVERAGING -10/12 C OR LESS SHOULD HELP TO
KEEP LAPSE RATES FAIRLY STEEP THROUGH THE PERIOD. HIGH PRESSURE
RIDGE ACROSS CENTRAL FL SHOULD KEEP WINDS LIGHT AND FROM THE EAST
TUE AND WED. WINDS BECOME MORE SOUTHERLY THU AND FRI AS INVERTED
TROUGH DEVELOPS LATE WED. GUIDANCE TEMPS OK. PREFER GOING ABOVE
GUIDANCE ON POPS...MRF POPS LOOK MORE REALISTIC GIVEN WEATHER
PATTERN.

MARINE...WEAK SURFACE HIGH RIDGES ACROSS THE BAHAMAS...FL AND INTO
GA/AL. AVN/MRF DEVELOPS AN INVERTED TROUGH ALONG FL EAST COAST LATE
WED. WINDS GENERALLY 15 KT OR LESS.

PRELIM NUMBERS

DAB BB 063/086 064/084 064 67322
MCO BB 065/089 063/087 064 67332
MLB BB 065/088 066/085 065 67333

.MLB...NONE.

GLITTO/WIMMER

In the hours before

Local storm report, May 9, 4:40 PM EDT, 1 hour 36 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MELBOURNE FL
440 PM EDT SUN MAY 09 1999

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

0420 PM    FELLSMERE                 FL   1 INCH HAIL
05/09/99   INDIAN RIVER                   QUARTER HAIL REPORTED BY
                                          SKYWARN SPOTTER.
Local storm report, May 9, 4:40 PM EDT, 1 hour 36 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MELBOURNE FL
440 PM EDT SUN MAY 09 1999

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

0420 PM    FELLSMERE                 FL   1 INCH HAIL
05/09/99   INDIAN RIVER                   QUARTER HAIL REPORTED BY
                                          SKYWARN SPOTTER.
Local storm report, May 9, 4:54 PM EDT, 1 hour 22 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MELBOURNE FL
454 PM EDT SUN MAY 09 1999

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

0450 PM    PALM BAY                  FL   .75 INCH HAIL
05/09/99   BREVARD                        DIME SIZE HAIL REPORTED BY
                                          SKYWARN SPOTTER.
Local storm report, May 9, 4:54 PM EDT, 1 hour 22 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MELBOURNE FL
454 PM EDT SUN MAY 09 1999

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

0450 PM    PALM BAY                  FL   .75 INCH HAIL
05/09/99   BREVARD                        DIME SIZE HAIL REPORTED BY
                                          SKYWARN SPOTTER.
Local storm report, May 9, 5:24 PM EDT, 52 minutes before
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Local storm report, May 9, 5:24 PM EDT, 52 minutes before
<!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <title>Service Notice</title>
  <link rel="stylesheet" href="index.css">
</head>
<body>
  <main class="wrap">
    <section class="card" role="status" aria-live="polite">
      <div class="status" id="status">Temporary Notice</div>
      <h1 id="headline">This service is currently unavailable.</h1>
      <p id="message1">
        The site you requested is temporarily down for maintenance or an unexpected outage.
      </p>
      <p id="message2">
        Please try again in a few minutes.
      </p>
      <p class="small" id="detail">
        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
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The office that day

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

IssuedProductOfficeCountiesLasted
May 8, 8:26 PM EDTSevere Thunderstorm WarningMLBSaint Lucie49 min
May 9, 2:30 PM EDTSevere Thunderstorm WarningMLBMartin45 min
May 9, 2:59 PM EDTSevere Thunderstorm WarningMLBSaint Lucie61 min
May 9, 3:20 PM EDTSevere Thunderstorm WarningMLBBrevard60 min
May 9, 3:32 PM EDTSevere Thunderstorm WarningMLBIndian River63 min
May 9, 3:52 PM EDTSevere Thunderstorm WarningMLBOkeechobee58 min
May 9, 4:27 PM EDTSevere Thunderstorm WarningMLBBrevard48 min
May 9, 4:36 PM EDTSevere Thunderstorm WarningMLBVolusia64 min
May 9, 5:21 PM EDTSevere Thunderstorm WarningMLBBrevard29 min
May 9, 5:23 PM EDTSevere Thunderstorm WarningMLBSeminole47 min

Nearby

Severe Thunderstorm Warnings in Florida, 1999Every severe thunderstorm warning in 1999

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.