Alert archive / Florida / Areal Flood Warnings in 2017

Areal Flood Warning 7, NWS Melbourne, FL

September 10, 201710 counties in Florida

NWS Melbourne, FL issued this areal flood warning at Sep 10, 2017, 5:58 PM EDT for 10 counties in Florida. It was in force for 12 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Sep 10, 2017, 5:58 PM EDT (21:58 UTC)
Expired
Sep 11, 2017, 5:45 AM EDT
In force
12 hr
Issued by
NWS Melbourne, FL
Area
Storm-based polygon
Flood severity
None

Counties Brevard County, FL, Indian River County, FL, Lake County, FL, Martin County, FL, Okeechobee County, FL, Orange County, FL, Osceola County, FL, Saint Lucie County, FL, Seminole County, FL, Volusia County, FL

The radar

The Melbourne radar (KMLB), 30 km from the middle of the area, began a volume at 21:58 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

Tampa Bay, FL (KTBW), launched 12:00Z, 10.0 hours before the alert went out and 148 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 2017-09-10Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 103 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 2017-09-10The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 8 square meters per square second.193958Sfc1 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
103 J/kg
Mixed-layer CIN
-80 J/kg
Mixed-layer LCL
872 m above ground
0-6 km bulk shear
15 kt
0-1 km storm-relative helicity
8 m²/s²
0-3 km storm-relative helicity
186 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 Sep 10, 12:48 PM EDT, 5 hours 10 minutes earlier.

Area forecast discussion, Sep 10, 12:48 PM EDT, 5 hours 10 minutes before
Area Forecast Discussion
National Weather Service Melbourne FL
1248 PM EDT Sun Sep 10 2017

...Torrential rain with an increasing wind and tornado threat
spreading northward over east central Florida...

.DISCUSSION...
Major Hurricane Irma continues its northward motion this morning,
exhibiting a 20 nautical mile wide eye on KBYX (Key West) radar.
The center is forecast to move up the west coast, placing all of
east central Florida in the northeastern quadrant of the storm.
The large wind field associated with the storm will produce far-
reaching effects, and a period of damaging winds with gusts to
hurricane force is still expected late this afternoon and into
early Monday morning.

The outer rainbands of Irma will continue to spread north and east
this morning, increasing in both coverage and intensity. The CDO
(central dense overcast) will move in late this afternoon and into
tonight, producing a more widespread wind and heavy rainfall
event (with a lower, but non-zero, threat of TC tornadoes).

NOW IS THE TIME TO REMAIN IN YOUR SAFE SHELTER! Residents and visitors
to east central Florida are strongly encouraged to monitor the latest
products issued by your local National Weather Service Office.

PLEASE REFER TO THE LATEST TCV AND HLS PRODUCTS FOR THE LATEST
INFORMATION CONCERNING THREATS AND IMPACTS PERTAINING TO IRMA.

&&

.AVIATION...
Deteriorating conditions expected through the next 24 hours as
Irma closes in on Florida. Multiple TEMPO groups through the
forecast with onshore-moving showers from the Atlantic. On and off
showers will continue early this afternoon with steadier rain
settling in this evening and overnight. MVFR conditions will
deteriorate toward IFR criteria by this evening, especially for
terminals across the Treasure Coast. Winds will continue to
increase through the day as the eye of Irma moves across the
western half of Florida.

&&

.MARINE...
Today-Tonight...Hurricane Warnings remain in effect for the
coastal waters of east Central Florida as Major Hurricane Irma
churns through the Florida Keys and into the southwestern portion
of the peninsula. East to southeast winds will increase to 35-45
knots through the day as wave heights build to 15-25 feet. Winds
will gradually diminish from south to north by later tonight as
seas also slowly subside. Nonetheless, dangerous conditions will
continue through the night with wave heights remaining in the
10-15 foot range by Monday morning.

Monday-Wednesday...Gusty south/southwest winds will diminish in
the wake of Irma through the day on Monday as seas further
subside through midweek.

&&

.PRELIMINARY POINT TEMPS/POPS...
DAB  82  77  86  72 / 100 100  80  20
MCO  79  75  84  73 / 100 100  70  20
MLB  86  79  89  74 / 100 100  70  20
VRB  85  79  90  74 / 100 100  60  20
LEE  80  76  83  73 / 100 100  90  20
SFB  80  77  84  73 / 100 100  70  20
ORL  80  76  84  73 / 100 100  70  20
FPR  86  79  90  74 / 100 100  50  20

&&

.MLB WATCHES/WARNINGS/ADVISORIES...
FL...Flood Watch through Monday evening for Coastal Volusia County-
     Indian River-Inland Volusia County-Martin-Northern Brevard
     County-Northern Lake County-Okeechobee-Orange-Osceola-
     Seminole-Southern Brevard County-Southern Lake County-St.
     Lucie.

     Tornado Watch until midnight EDT tonight for Coastal Volusia
     County-Indian River-Inland Volusia County-Martin-Northern
     Brevard County-Northern Lake County-Okeechobee-Orange-
     Osceola-Seminole-Southern Brevard County-Southern Lake
     County-St. Lucie.

     Hurricane Warning for Coastal Volusia County-Indian River-Inland
     Volusia County-Martin-Northern Brevard County-Northern Lake
     County-Okeechobee-Orange-Osceola-Seminole-Southern Brevard
     County-Southern Lake County-St. Lucie.

AM...Tornado Watch until midnight EDT tonight for Flagler Beach to
     Volusia-Brevard County Line 0-20 nm-Flagler Beach to
     Volusia-Brevard County Line 20-60 nm-Sebastian Inlet to
     Jupiter Inlet 0-20 nm-Sebastian Inlet to Jupiter Inlet 20-
     60 nm-Volusia-Brevard County Line to Sebastian Inlet 0-20
     nm-Volusia-Brevard County Line to Sebastian Inlet 20-60 nm.

     Hurricane Warning for Flagler Beach to Volusia-Brevard County
     Line 0-20 nm-Flagler Beach to Volusia-Brevard County Line
     20-60 nm-Sebastian Inlet to Jupiter Inlet 0-20 nm-Sebastian
     Inlet to Jupiter Inlet 20-60 nm-Volusia-Brevard County Line
     to Sebastian Inlet 0-20 nm-Volusia-Brevard County Line to
     Sebastian Inlet 20-60 nm.

&&

Ulrich/Pendergrast/Combs/Rodriguez/Kelly/Glitto/Blottman/Volkmer

In the hours before

Local storm report, Sep 10, 5:42 PM EDT, 16 minutes before
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Local storm report, Sep 10, 5:49 PM EDT, 9 minutes before
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Local storm report, Sep 10, 5:52 PM EDT, 6 minutes before
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Local storm report, Sep 10, 5:54 PM EDT, 4 minutes before
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Local storm report, Sep 10, 5:55 PM EDT, 3 minutes before
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Local storm report, Sep 10, 5:58 PM EDT, 0 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MELBOURNE FL
558 PM EDT SUN SEP 10 2017

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0545 PM     TROPICAL STORM   5 N EDGEWATER           29.05N 80.90W
09/10/2017                   VOLUSIA            FL   MESONET

            WXFLOW SITE XNSB MEASURED WIND GUST OF 19KT/56MPH FROM
            ENE. SUSTAINED GUSTS OF 38KT/44MPH.

&&

KR

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 9, 9:34 PM EDTTornado WarningMLBSaint Lucie26 min
Sep 9, 9:59 PM EDTTornado WarningMLBSaint Lucie16 min
Sep 10, 1:54 AM EDTAreal Flood WarningMLBSaint Lucie111 min
Sep 10, 3:24 AM EDTFlash Flood WarningMLBSaint Lucie111 min
Sep 10, 3:49 AM EDTTornado WarningMLBIndian River, Saint Lucie16 min
Sep 10, 5:14 AM EDTAreal Flood WarningMLBIndian River, Saint Lucie3 hr
Sep 10, 5:14 AM EDTTornado WarningMLBBrevard31 min
Sep 10, 5:53 AM EDTTornado WarningMLBBrevard22 min
Sep 10, 8:05 AM EDTAreal Flood WarningMLBSaint Lucie3 hr
Sep 10, 8:18 AM EDTSpecial Marine WarningMLB42 min
Sep 10, 8:35 AM EDTSpecial Marine WarningMLB55 min
Sep 10, 9:19 AM EDTTornado WarningMLBBrevard26 min
Sep 10, 9:42 AM EDTAreal Flood WarningMLBIndian River3 hr
Sep 10, 10:28 AM EDTTornado WarningMLBOsceola32 min
Sep 10, 11:01 AM EDTTornado WarningMLBBrevard29 min
Sep 10, 11:12 AM EDTTornado WarningMLBBrevard48 min
Sep 10, 11:21 AM EDTTornado WarningMLBSaint Lucie24 min
Sep 10, 11:40 AM EDTTornado WarningMLBOkeechobee35 min
Sep 10, 11:48 AM EDTTornado WarningMLBSaint Lucie27 min
Sep 10, 11:58 AM EDTTornado WarningMLBBrevard, Indian River30 min
Sep 10, 12:09 PM EDTAreal Flood WarningMLBBrevard, Indian River, Okeechobee, Osceola, Saint Lucie3 hr
Sep 10, 12:13 PM EDTTornado WarningMLBOsceola32 min
Sep 10, 12:41 PM EDTTornado WarningMLBMartin, Saint Lucie34 min
Sep 10, 1:27 PM EDTTornado WarningMLBBrevard, Indian River33 min
Sep 10, 1:42 PM EDTTornado WarningMLBMartin, Saint Lucie33 min
Sep 10, 1:53 PM EDTTornado WarningMLBBrevard, Indian River20 min
Sep 10, 2:37 PM EDTTornado WarningMLBBrevard38 min
Sep 10, 2:39 PM EDTTornado WarningMLBSaint Lucie51 min
Sep 10, 3:12 PM EDTTornado WarningMLBIndian River, Saint Lucie33 min
Sep 10, 3:15 PM EDTTornado WarningMLBBrevard30 min
Sep 10, 3:16 PM EDTRiver Flood WarningMLBOsceola12 days
Sep 10, 3:22 PM EDTTornado WarningMLBMartin, Saint Lucie23 min
Sep 10, 3:56 PM EDTAreal Flood WarningMLBBrevard, Indian River, Saint Lucie109 min
Sep 10, 4:09 PM EDTTornado WarningMLBBrevard66 min
Sep 10, 4:14 PM EDTTornado WarningMLBIndian River31 min
Sep 10, 4:28 PM EDTTornado WarningMLBMartin, Saint Lucie47 min
Sep 10, 4:31 PM EDTRiver Flood WarningMLBSeminole38 hr
Sep 10, 4:38 PM EDTTornado WarningMLBBrevard, Indian River22 min
Sep 10, 4:42 PM EDTTornado WarningMLBBrevard, Seminole33 min
Sep 10, 4:44 PM EDTTornado WarningMLBBrevard, Seminole, Volusia16 min
Sep 10, 4:59 PM EDTTornado WarningMLBBrevard, Indian River31 min
Sep 10, 5:10 PM EDTTornado WarningMLBOsceola35 min
Sep 10, 5:12 PM EDTTornado WarningMLBBrevard, Seminole, Volusia63 min
Sep 10, 5:31 PM EDTTornado WarningMLBIndian River, Saint Lucie29 min
Sep 10, 5:43 PM EDTTornado WarningMLBSeminole, Volusia32 min
Sep 10, 5:45 PM EDTTornado WarningMLBVolusia30 min
Sep 10, 5:52 PM EDTTornado WarningMLBBrevard53 min
Sep 10, 6:15 PM EDTTornado WarningMLBLake, Seminole, Volusia30 min
Sep 10, 6:34 PM EDTTornado WarningMLBOrange, Seminole26 min
Sep 10, 6:39 PM EDTTornado WarningMLBOrange36 min
Sep 10, 6:58 PM EDTTornado WarningMLBBrevard, Volusia32 min
Sep 10, 7:25 PM EDTTornado WarningMLBLake35 min
Sep 10, 7:48 PM EDTFlash Flood WarningMLBBrevard, Indian River, Osceola2 hr

Nearby

Areal Flood Warnings in Florida, 2017Every areal flood warning in 2017

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.