Alert archive / Florida / Areal Flood Warnings in 2015

Areal Flood Warning 3, NWS Melbourne, FL

February 28, 2015Martin County, Florida

NWS Melbourne, FL issued this areal flood warning at Feb 28, 2015, 11:17 AM EST for Martin County, Florida. It was in force for 118 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
Feb 28, 2015, 11:17 AM EST (16:17 UTC)
Expired
Feb 28, 2015, 1:15 PM EST
In force
118 min
Issued by
NWS Melbourne, FL
Area
Storm-based polygon
Flood severity
None

County Martin County, FL

The radar

The Melbourne radar (KMLB), 117 km from the middle of the area, began a volume at 16:19 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

Cape Canaveral, FL (KXMR), launched 12:00Z, 4.3 hours before the alert went out and 155 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, Cape Canaveral, FL at 12:00Z on 2015-02-28Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 27 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, Cape Canaveral, FL at 12:00Z on 2015-02-28The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 78 square meters per square second.19395878Sfc1 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
27 J/kg
Mixed-layer CIN
-22 J/kg
Mixed-layer LCL
519 m above ground
0-6 km bulk shear
47 kt
0-1 km storm-relative helicity
78 m²/s²
0-3 km storm-relative helicity
180 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

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 Feb 28, 10:30 AM EST, 47 minutes earlier.

Area forecast discussion, Feb 28, 10:30 AM EST, 47 minutes before
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Hazardous weather outlook, Feb 28, 9:18 AM EST, 1 hour 59 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE MELBOURNE FL
918 AM EST SAT FEB 28 2015

AMZ550-552-555-570-572-575-FLZ041-044>047-053-054-058-059-064-141-
144-147-010100-
FLAGLER BEACH TO VOLUSIA-BREVARD COUNTY LINE 0-20 NM-VOLUSIA-
BREVARD COUNTY LINE TO SEBASTIAN INLET 0-20 NM-
SEBASTIAN INLET TO JUPITER INLET 0-20 NM-FLAGLER BEACH TO VOLUSIA-
BREVARD COUNTY LINE 20-60 NM-VOLUSIA-
BREVARD COUNTY LINE TO SEBASTIAN INLET 20-60 NM-
SEBASTIAN INLET TO JUPITER INLET 20-60 NM-INLAND VOLUSIA COUNTY-
NORTHERN LAKE COUNTY-ORANGE-SEMINOLE-SOUTHERN BREVARD COUNTY-
OSCEOLA-INDIAN RIVER-OKEECHOBEE-ST. LUCIE-MARTIN-
COASTAL VOLUSIA COUNTY-SOUTHERN LAKE COUNTY-
NORTHERN BREVARD COUNTY-
918 AM EST SAT FEB 28 2015

THIS HAZARDOUS WEATHER OUTLOOK IS FOR EAST CENTRAL FLORIDA.

.DAY ONE...TODAY AND TONIGHT.

.THUNDERSTORM IMPACT...
INCREASED MOISTURE AND DAYTIME HEATING WILL BRING A SLIGHT CHANCE
OF LIGHTNING STORMS THIS AFTERNOON ACROSS OKEECHOBEE COUNTY AND
THE TREASURE COAST.

.FLOOD IMPACT...
PERSISTENT RAINFALL NEAR THE TREASURE COAST WILL CONTINUE TO
PRODUCE FLOODING IN LOW LYING AREAS TODAY. HEAVY RAIN AMOUNTS
UP TO FOUR INCHES HAVE ALREADY BEEN REPORTED IN THE PORT ST LUCIE
AREA AS OF MID MORNING...LEADING TO FLOODING OF STREETS AND LOW
LYING AREAS. ADDITIONAL PERSISTENT RAINFALL ALONG THE MARTIN AND
ST LUCIE COUNTY COASTS WILL FURTHER AGGRAVATE ANY STANDING WATER
AND MAY LEAD TO ADDITIONAL FLOODING ISSUES TODAY.

.RIP CURRENT IMPACT...
BREEZY TO WINDY ONSHORE FLOW COMBINED WITH BUILDING SEAS WILL
PRODUCE LOCALLY ROUGH SURF ALONG EAST CENTRAL FLORIDA BEACHES
TODAY. A MODERATE THREAT FOR RIP CURRENTS WILL CONTINUE. BEACH
GOERS SHOULD USE EXTREME CAUTION IF HEADING INTO THE COOL AND
CHOPPY SURF AND SWIM ONLY WITHIN SIGHT OF A LIFEGUARD.

.WIND AND SEA IMPACT...
WINDS WILL BECOME EAST TODAY AND STRENGTHEN TO NEAR 20 KNOTS WHILE
SEAS BUILD TO 6 TO 8 FEET NEAR SHORE AND 8 TO 10 FEET OFFSHORE
INTO TONIGHT. A SMALL CRAFT ADVISORY REMAINS IN EFFECT.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY.
A LINGERING SWELL WILL KEEP BOATING CONDITIONS HAZARDOUS THROUGH
SUNDAY.

.SPOTTER INFORMATION STATEMENT...
SPOTTER ACTIVATION WILL NOT BE NEEDED TODAY.

ULRICH/GLITTO

The office that day

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

IssuedProductOfficeCountiesLasted
Feb 28, 7:34 AM ESTAreal Flood AdvisoryMLBMartin, Saint Lucie116 min
Feb 28, 8:44 AM ESTAreal Flood WarningMLBMartin, Saint Lucie91 min
Feb 28, 9:57 AM ESTAreal Flood WarningMLBMartin, Saint Lucie78 min
Feb 28, 10:15 AM ESTFlash Flood WarningMLBMartin, Saint Lucie90 min
Feb 28, 11:47 AM ESTAreal Flood WarningMLBSaint Lucie88 min
Feb 28, 12:17 PM ESTSpecial Weather StatementMLBMartin43 min
Feb 28, 1:16 PM ESTAreal Flood WarningMLBMartin, Saint Lucie119 min
Feb 28, 6:20 PM ESTSpecial Weather StatementMLBOkeechobee85 min
Feb 28, 6:34 PM ESTSevere Thunderstorm WarningMLBOkeechobee32 min

Nearby

Areal Flood Warnings in Florida, 2015Every areal flood warning in 2015

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.