Alert archive / Florida / Areal Flood Warnings in 2009
Areal Flood Warning 9, NWS Melbourne, FL
NWS Melbourne, FL issued this areal flood warning at Dec 17, 2009, 8:31 PM EST for Saint Lucie County, Florida. It was in force for 104 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Dec 17, 2009, 8:31 PM EST (01:31 UTC)
- Expired
- Dec 17, 2009, 10:15 PM EST
- In force
- 104 min
- Issued by
- NWS Melbourne, FL
- Area
- Storm-based polygon
- Flood severity
- None
County Saint Lucie County, FL
The radar
The Melbourne radar (KMLB), 84 km from the middle of the area, began a volume at 01:33 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.
The nearest sounding before it
Miami, FL (KMFL), launched 00:00Z, 1.5 hours before the alert went out and 174 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
- 653 J/kg
- Mixed-layer CIN
- -16 J/kg
- Mixed-layer LCL
- 662 m above ground
- 0-6 km bulk shear
- 8 kt
- 0-1 km storm-relative helicity
- 40 m²/s²
- 0-3 km storm-relative helicity
- 66 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
What forecasters said that day
The local office's own words before this areal flood 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 areal flood warning went out at Dec 17, 2:38 PM EST, 5 hours 53 minutes earlier.
Area forecast discussion, Dec 17, 2:38 PM EST, 5 hours 53 minutes before
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</html>Hazardous weather outlook, Dec 17, 11:00 AM EST, 9 hours 31 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE MELBOURNE FL 1100 AM EST THU DEC 17 2009 AMZ550-552-555-570-572-575-FLZ041-044>047-053-054-058-059-064-141- 144-147-172100- 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- 1100 AM EST THU DEC 17 2009 THIS HAZARDOUS WEATHER OUTLOOK IS FOR EAST CENTRAL FLORIDA. .DAY ONE...TODAY AND TONIGHT. ...RISK FOR ROTATING STORMS TO PRODUCE FUNNEL CLOUDS AND WATERSPOUTS THIS AFTERNOON AND EARLY EVENING SOUTH OF CAPE CANAVERAL... ...THUNDERSTORM IMPACT... LATE THIS MORNING...DOPPLER RADARS WERE SHOWING NUMEROUS SHOWERS AND OCCASIONAL ISOLATED LIGHTNING STORMS OVER AND OFFSHORE COMMUNITIES FROM SEBASTIAN INLET SOUTH...WITH THE HEAVIEST ACTIVITY OCCURRING OVER MARTIN AND SAINT LUCIE COUNTIES. RADAR INDICATED THAT THE STRONGER CELLS WERE EXHIBITING OCCASIONAL WEAK ROTATION. WITH THE BOUNDARY EXPECTED TO REMAIN NEARLY STATIONARY INTO EARLY EVENING...THE FOCUS FOR SHOWERS AND STORMS WILL BE PRIMARILY CONFINED TO THE TREASURE COAST COUNTIES...AS WELL AS AROUND LAKE OKEECHOBEE. THE MORE INTENSE CELLS WILL REMAIN CAPABLE OF PRODUCING CLOUD TO GROUND LIGHTNING STRIKES AND FUNNEL CLOUDS. A BRIEF TORNADO TOUCHDOWN CANNOT BE RULED OUT. THE THREAT FOR ROTATING STORMS WILL SHIFT SLOWLY NORTHWARD OVERNIGHT AS A STALLED FRONTAL BOUNDARY NEAR LAKE OKEECHOBEE BEGINS TO PUSH TO THE NORTH AS A WARM FRONT. ...FLOOD IMPACT... SHOWERS AND STORMS HAVE ALREADY PRODUCED LOCALLY HEAVY RAINFALL AMOUNTS IN EXCESS OF ONE INCH ACROSS EASTERN MARTIN COUNTY. LOCAL PONDING OF WATER WILL REMAIN POSSIBLE...MAINLY ACROSS MARTIN... OKEECHOBEE...SAINT LUCIE...AND INDIAN RIVER COUNTIES THIS AFTERNOON ...BEFORE SHIFTING GRADUALLY NORTHWARD OVERNIGHT. RAINFALL IS EXPECTED TO BECOME WIDESPREAD OVER EAST CENTRAL FLORIDA LATE TONIGHT. VERY HEAVY DOWNPOURS MAY OCCUR ALONG WITH LOCALIZED FLOODING WHERE RAIN PERSISTS. ...RIP CURRENT IMPACT... THERE WILL BE AN ELEVATED RISK OF RIP CURRENTS AT EAST CENTRAL FLORIDA BEACHES TODAY. ALWAYS SWIM NEAR A LIFEGUARD AND NEVER SWIM ALONE. ...MARINE THUNDERSTORM GUST IMPACT... A FEW STORMS OVER THE INTRACOASTAL WATERWAY AND NEAR SHORE ATLANTIC WILL BE CAPABLE OF PRODUCING WIND GUSTS OF 35 KNOTS OR GREATER TODAY AND TONIGHT. THE HIGHEST CHANCES WILL BE SOUTH OF SEBASTIAN INLET THIS AFTERNOON...THEN SHIFTING GRADUALLY NORTHWARD OVERNIGHT. ...WATERSPOUT IMPACT... WATERSPOUTS WILL ALSO BE POSSIBLE. AGAIN...THE HIGHEST THREAT WILL BE ALONG AND OFFSHORE THE TREASURE COAST FROM SEBASTIAN INLET SOUTH ...BEFORE SHIFTING NORTHWARD OVERNIGHT. ...WIND AND SEA IMPACT... NORTHEAST WINDS OF 20 KNOTS NEAR SHORE AND UP TO 25 KNOTS OFFSHORE WILL BECOME EAST THEN SOUTHEAST INTO TONIGHT. SEAS WILL BUILD TO 5 TO 7 FEET NEAR SHORE...UP TO 10 FEET OFFSHORE. A SMALL CRAFT ADVISORY IS IN EFFECT FOR ALL EAST CENTRAL FLORIDA COASTAL WATERS. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY. ...RISK OF STRONG TO SEVERE STORMS ON FRIDAY... DEVELOPING LOW PRESSURE OVER THE WESTERN GULF OF MEXICO WILL CROSS NORTH FLORIDA WHILE RAPIDLY STRENGTHENING DURING THE DAY ON FRIDAY. ABUNDANT DEEP LAYER MOISTURE...ALONG WITH STRONG LOW TO MID LEVEL WINDS AND AN INCREASINGLY FAVORABLE LOW LEVEL WIND SHEAR PROFILE WILL INCREASE THE THREAT FOR SEVERE STORMS TO PRODUCE DAMAGING WIND GUSTS AND TORNADOES DURING THE DAY. LATEST MODEL GUIDANCE FROM THURSDAY MORNING IS INDICATING THAT THE LOW IS LIKELY TO BE STRONGER THAN PREVIOUSLY INDICATED. WHILE THE EXACT TIMING IS STILL A BIT UNCERTAIN...AT THIS TIME IT APPEARS THAT A PRE-FRONTAL SQUALL LINE WILL REACH LAKE COUNTY SOMETIME AROUND MID MORNING...THEN SHIFT RAPIDLY EASTWARD ACROSS ORANGE...OSCEOLA...SEMINOLE AND VOLUSIA COUNTIES FROM LATE MORNING TO EARLY AFTERNOON. THE SQUALL LINE WILL THEN PUSH ACROSS OKEECHOBEE ...BREVARD...INDIAN RIVER...SAINT LUCIE AND MARTIN COUNTIES DURING THE AFTERNOON. PERSONS SHOULD REMAIN AWARE OF THE POTENTIAL FOR SEVERE WEATHER TONIGHT INTO FRIDAY. MONITOR NOAA WEATHER RADIO AND YOUR LOCAL MEDIA OUTLETS FOR POTENTIAL WATCHES...WARNINGS...AND STATEMENTS...AS WELL AS YOUR LOCAL FORECAST. IF YOU OWN A WEATHER RADIO...NOW IS THE TIME TO MAKE SURE THAT IT IS IN GOOD WORKING ORDER...CORRECTLY PROGRAMMED...AND HAS A FRESH BATTERY. .SPOTTER INFORMATION STATEMENT... SPOTTERS ARE REQUESTED TO MONITOR THE WEATHER AND SELF ACTIVATE IF NEEDED LATE TONIGHT. SPOTTER ACTIVATION APPEARS LIKELY BY SOMETIME EARLY FRIDAY MORNING. GLITTO/CRISTALDI
The office that day
Everything else NWS Melbourne, FL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Dec 18, 4:28 AM EST | Tornado Warning | MLB | Brevard, Indian River | 33 min |
| Dec 18, 4:32 AM EST | Gale Warning | MLB | 23 hr | |
| Dec 18, 4:32 AM EST | Small Craft Advisory | MLB | 71 hr | |
| Dec 18, 4:35 AM EST | Lake Wind Advisory | MLB | Lake, Okeechobee, Orange, Osceola, Seminole, Volusia | 13 hr |
| Dec 18, 5:00 AM EST | Special Marine Warning | MLB | 2 hr | |
| Dec 18, 5:37 AM EST | Tornado Warning | MLB | Brevard | 24 min |
| Dec 18, 6:58 AM EST | Special Marine Warning | MLB | 2 hr | |
| Dec 18, 7:47 AM EST | Special Marine Warning | MLB | 118 min | |
| Dec 18, 8:56 AM EST | Special Marine Warning | MLB | 2 hr | |
| Dec 18, 9:41 AM EST | Special Marine Warning | MLB | 2 hr | |
| Dec 18, 5:12 PM EST | Tornado Warning | MLB | Osceola | 48 min |
| Dec 18, 6:11 PM EST | Special Marine Warning | MLB | 79 min |
Nearby
Areal Flood Warnings in Florida, 2009Every areal flood 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.