Alert archive / Florida / Flash Flood Warnings in 2017

Flash Flood Warning 3, NWS Melbourne, FL

September 10, 20174 counties in Florida

NWS Melbourne, FL issued this flash flood warning at Sep 10, 2017, 9:58 PM EDT for 4 counties in Florida. It was in force for 107 min. 2 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued
Sep 10, 2017, 9:58 PM EDT (01:58 UTC)
Expired
Sep 10, 2017, 11:45 PM EDT
In force
107 min
Issued by
NWS Melbourne, FL
Area
Storm-based polygon
Flood severity
None

Counties Brevard County, FL, Orange County, FL, Seminole County, FL, Volusia County, FL

The radar

The Melbourne radar (KMLB), 40 km from the middle of the area, began a volume at 02:02 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

TimeReportWhereRemark
Sep 10, 10:48 PM EDTFLASH FLOODRockledge, FLREPORTS OF FLOOD WATER UP TO MAILBOXES
Sep 10, 11:00 PM EDTFLASH FLOOD1 E Port Saint John, FLVIDEO RELAYED VIA SOCIAL MEDIA OF FLOODING AT US 1 AND FAY BLVD

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Tampa Bay, FL (KTBW), launched 00:00Z, 2.0 hours before the alert went out and 183 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 00:00Z on 2017-09-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Tampa Bay, FL at 00:00Z on 2017-09-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 29 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1120 m above ground
0-6 km bulk shear
23 kt
0-1 km storm-relative helicity
29 m²/s²
0-3 km storm-relative helicity
63 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

231 
WGUS52 KMLB 110158
FFWMLB
FLC009-095-117-127-110345-
/O.NEW.KMLB.FF.W.0003.170911T0158Z-170911T0345Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Melbourne FL
958 PM EDT SUN SEP 10 2017

The National Weather Service in Melbourne has issued a

* Flash Flood Warning for...
  Seminole County in east central Florida...
  Northern Brevard County in Florida...
  Southeastern Orange County in east central Florida...
  Southeastern Volusia County in east central Florida...

* Until 1145 PM EDT

* At 946 PM EDT, Doppler radar indicated a persistent heavy rain 
  band from Hurricane Irma moving through northern Brevard County 
  inland through Orange, Seminole and extreme southern Volusia 
  counties. Additional rainfall amounts up to 2 to 4 inches with 
  this rain band, combined with observed rainfall amounts up to 7 to 
  9 inches that have already fallen across this area today will lead 
  to flash flooding of area roadways and may lead to water entering 
  some homes in the warned area. 

* Some locations that will experience flooding include...
  Sanford, Titusville, Oviedo and Bithlo. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Stay off roadways as strong tropical storm force conditions and 
flooding are occurring. Be especially cautious at night when it is 
harder to recognize the dangers of flooding.

&&

LAT...LON 2839 8056 2832 8057 2827 8057 2834 8086
      2835 8086 2835 8091 2842 8124 2884 8133
      2881 8069 2860 8054 2852 8051 2844 8051

$$

Weitlich
1 follow-up statement
475 
WGUS72 KMLB 110340
FFSMLB

Flash Flood Statement
National Weather Service Melbourne FL
1140 PM EDT SUN SEP 10 2017

FLC009-095-117-127-110346-
/O.EXP.KMLB.FF.W.0003.000000T0000Z-170911T0345Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Seminole FL-Brevard FL-Orange FL-Volusia FL-
1140 PM EDT SUN SEP 10 2017

...THE FLASH FLOOD WARNING FOR SEMINOLE...NORTHERN BREVARD...
SOUTHEASTERN ORANGE AND SOUTHEASTERN VOLUSIA COUNTIES WILL EXPIRE AT
1145 PM EDT...

The heavy rain band from Hurricane Irma has shifted north of the 
warned area. Additional rain will continue through late tonight 
which will aggravate ongoing flooding issues. However significant 
rises in rainfall amounts that could lead to additional flash 
flooding across northern Brevard, Seminole, eastern Orange, and 
extreme southern Volusia counties are not expected.

LAT...LON 2839 8056 2832 8057 2827 8057 2834 8086
      2835 8086 2835 8091 2842 8124 2884 8133
      2881 8069 2860 8054 2852 8051 2844 8051

$$

Weitlich

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 10, 8:09 PM EDTSpecial Weather StatementMLBBrevard, Indian River, Orange, Osceola51 min
Sep 10, 8:40 PM EDTTornado WarningMLBBrevard35 min
Sep 10, 8:51 PM EDTTornado WarningMLBLake, Seminole, Volusia24 min
Sep 10, 9:01 PM EDTTornado WarningMLBBrevard14 min
Sep 10, 9:06 PM EDTSpecial Weather StatementMLBBrevard, Lake, Orange, Seminole, Volusia54 min
Sep 10, 9:19 PM EDTTornado WarningMLBVolusia26 min
Sep 10, 9:34 PM EDTTornado WarningMLBLake, Volusia26 min
Sep 10, 9:45 PM EDTTornado WarningMLBBrevard15 min
Sep 10, 10:10 PM EDTRiver Flood WarningMLBBrevard53 days
Sep 10, 10:10 PM EDTRiver Flood WarningMLBLake, Volusia60 days
Sep 10, 10:21 PM EDTTornado WarningMLBBrevard, Orange24 min
Sep 10, 10:35 PM EDTTornado WarningMLBVolusia25 min
Sep 10, 10:51 PM EDTTornado WarningMLBBrevard, Volusia9 min
Sep 10, 11:27 PM EDTSpecial Weather StatementMLBLake33 min
Sep 11, 12:01 AM EDTSpecial Weather StatementMLBLake, Orange, Osceola89 min
Sep 11, 1:33 AM EDTSpecial Weather StatementMLBLake, Orange87 min
Sep 11, 3:00 AM EDTSpecial Weather StatementMLBLake90 min
Sep 11, 5:34 AM EDTTropical Storm WarningMLBLake, Okeechobee, Orange, Osceola, Seminole, Volusia10 hr
Sep 11, 11:21 AM EDTWind AdvisoryMLBLake, Okeechobee, Orange, Osceola, Seminole, Volusia7 hr
Sep 11, 11:29 AM EDTCoastal Flood StatementMLBVolusia17 hr
Sep 11, 3:59 PM EDTSmall Craft AdvisoryMLB18 hr

Nearby

Flash Flood Warnings in Florida, 2017Every flash 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.