Alert archive / Florida / Red Flag Warnings in 2021

Red Flag Warning 4, NWS Melbourne, FL

April 10, 20216 counties in Florida

NWS Melbourne, FL issued this red flag warning at Apr 10, 2021, 4:08 AM EDT for 6 counties in Florida. It took effect at Apr 10, 2021, 12:00 PM EDT. It was in force for 7 hr. 21 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
Apr 10, 2021, 4:08 AM EDT (08:08 UTC)
In effect from
Apr 10, 2021, 12:00 PM EDT
Expired
Apr 10, 2021, 7:00 PM EDT
In force
7 hr
Issued by
NWS Melbourne, FL

Counties Lake County, FL, Okeechobee County, FL, Orange County, FL, Osceola County, FL, Seminole County, FL, Volusia County, FL

The radar

The Melbourne radar (KMLB), 67 km from the middle of the area, began a volume at 08:11 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
Apr 10, 5:24 PM EDTTSTM WND GST 0Leesburg Airport, FLASOS AT LEESBURG INTERNATIONAL AIRPORT KLEE MEASURED A PEAK WIND GUST OF 38KT OR 44MPH FROM THE WEST.
Apr 10, 5:24 PM EDTTSTM WND GST 44Leesburg Airport, FLASOS AT LEESBURG INTERNATIONAL AIRPORT KLEE MEASURED A PEAK WIND GUST OF 38KT OR 44MPH FROM THE WEST.
Apr 10, 5:30 PM EDTTSTM WND GST 433 Wsw Oakland, FLPEAK WIND GUST OF 43 MPH AT A WEATHEFLOW SITE SOUTH OF LAKE APOPKA, ON SHADY HOLLOW LOOP.
Apr 10, 5:30 PM EDTTSTM WND GST 434 Wnw Eustis, FLWEATHERFLOW STATION IN EUSTIS ON SANDY LANE MEASURED A PEAK WIND GUST OF 43 MPH.
Apr 10, 5:30 PM EDTTSTM WND GST 45Leesburg Airport, FLUPDATE TO PEAK GUST AT LEESBURG AIRPORT. PEAK GUST OF 39KT OR 45MPH FROM THE WEST.
Apr 10, 5:45 PM EDTTSTM WND GST 425 S Okahumpka, FLFAWN STATION IN OKAHUMPKA MEASURED A PEAK WIND GUST OF 42 MPH FROM THE SOUTHWEST.
Apr 10, 5:47 PM EDTTSTM WND GST 485 Nw Bay Lake, FLWEATHERFLOW SITE AT REEDY LAKE MEASURED A PEAK WIND GUST OF 48 MPH FROM THE WEST.
Apr 10, 5:48 PM EDTTSTM WND GST 53Orlando International A, FLASOS AT ORLANDO INTERNATIONAL AIRPORT MEASURED A PEAK WIND GUST OF 46KT OR 53MPH FROM THE WEST.
Apr 10, 5:52 PM EDTTSTM WND GST 535 Nw Bay Lake, FLUPDATED, REEDY LAKE WEATHERFLOW PEAK GUST UP TO 53 MPH FROM THE WEST.
Apr 10, 6:05 PM EDTTSTM WND GST 55Ocoee, FLEM REPORTS ESTIMATED WIND GUSTS UP TO 50-55 MPH IN OCOEE. SMALL TREE BRANCHES HAVE BEEN DOWNED AND THERE IS DAMAGE TO POOL SCREEN ENCLOSURES.
Apr 10, 6:07 PM EDTTSTM WND GST 441 Wsw Altamonte Springs, FLSPRING LAKE WEATHERFLOW MESONET MEASURED A PEAK WIND GUST OF 44 MPH FROM THE SOUTHWEST.
Apr 10, 6:10 PM EDTTSTM WND GST 433 Se Altamonte Springs, FLWEATHERSTEM STATION AT MAITLAND FR 45 MEASURED A PEAK WIND GUST OF 43 MPH.
Apr 10, 6:13 PM EDTTSTM WND GST 47Kissimmee Airport, FLAWOS AT KISSIMMEE GATEWAY MEASURED A PEAK WIND GUST OF 47MPH OR 41 KNOTS FROM THE NORTHWEST.
Apr 10, 6:15 PM EDTTSTM WND GST 47Orlando International A, FLPEAK WIND GUST OF 41KT OR 47MPH AT THE ORLANDO INTERNATIONAL AIRPORT FROM THE NW.
Apr 10, 6:22 PM EDTTSTM WND GST 50Sanford Airport, FLPEAK WIND GUST OF 43KT OR 50MPH AT SANFORD INTERNATIONAL AIRPORT FROM THE WEST-NORTHWEST.
Apr 10, 6:25 PM EDTTSTM WND DMG2 S Lake Jessup, FLBROADCAST MEDIA REPORTS WIND DAMAGE IN BARRINGTON ESTATES IN WINTER SPRINGS. SEVERAL TREE LIMBS DOWNED, FENCES AND OTHER BACKYARD ITEMS KNOCKED DOWN. TIME ESTIMATED FROM RADAR.
Apr 10, 6:27 PM EDTTSTM WND GST 47Daytona Beach Airport, FLPEAK WIND GUST OF 41KT OR 47MPH AT THE DAYTONA BEACH INTERNATIONAL AIRPORT FROM THE WEST-NORTHWEST.
Apr 10, 6:30 PM EDTTSTM WND GST 401 W Geneva, FLWEATHERFLOW SITE IN GENEVA ON COPELAND COURT MEASURED A PEAK WIND GUST OF 40MPH.
Apr 10, 6:35 PM EDTTSTM WND DMG5 S Daytona Beach, FLPUBLIC REPORTS LARGE TREE DOWNED IN PORT ORANGE, NEAR CLYDE MORRIS BLVD AND COLONY ROAD. TIME ESTIMATED FROM RADAR.
Apr 10, 6:45 PM EDTTSTM WND GST 466 Sse West Lake Toho, FLSFWMD STATION SOUTH OF LAKE TOHO MEASURED A PEAK WIND GUST OF 46 MPH.
Apr 10, 6:47 PM EDTTSTM WND GST 48New Smyrna Beach Airpor, FLAWOS AT NEW SMYRNA BEACH REGIONAL AIRPORT MEASURED A PEAK WIND GUST OF 42KT OR 48MPH FROM THE WNW.

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

The nearest sounding before it

Cape Canaveral, FL (KXMR), launched 00:00Z, 8.1 hours before the alert went out and 73 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 00:00Z on 2021-04-10Temperature 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°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Cape Canaveral, FL at 00:00Z on 2021-04-10The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 54 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
27 J/kg
Mixed-layer CIN
-222 J/kg
Mixed-layer LCL
1105 m above ground
0-6 km bulk shear
48 kt
0-1 km storm-relative helicity
54 m²/s²
0-3 km storm-relative helicity
82 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.1

Open this sounding in Storm Lab

The text

As transmitted.

389 
WWUS82 KMLB 100808
RFWMLB

URGENT - FIRE WEATHER MESSAGE
National Weather Service Melbourne FL
408 AM EDT Sat Apr 10 2021

...DANGEROUS FIRE WEATHER CONDITIONS ARE EXPECTED THIS AFTERNOON...

FLZ041-044>046-053-058-144-102300-
/O.UPG.KMLB.FW.A.0004.210410T1600Z-210410T2300Z/
/O.NEW.KMLB.FW.W.0004.210410T1600Z-210410T2300Z/
Inland Volusia-Northern Lake-Orange-Seminole-Osceola-Okeechobee-
Southern Lake-
408 AM EDT Sat Apr 10 2021

...RED FLAG WARNING IN EFFECT FROM NOON TODAY TO 7 PM EDT THIS
EVENING FOR LOW RELATIVE HUMIDITY, BREEZY SOUTH TO SOUTHWEST 
WINDS, HIGH DISPERSION, AND DRY GROUND CONDITIONS ACROSS INTERIOR
EAST CENTRAL FLORIDA...

The National Weather Service in Melbourne has issued a Red Flag
Warning, which is in effect from noon today to 7 PM EDT this
evening. The Fire Weather Watch is no longer in effect. 


* AFFECTED AREA... Inland Volusia... Northern Lake... Orange... 
  Seminole... Osceola... Okeechobee... Southern Lake. 

* WIND...South to southwest winds around 15 mph gusting to 20 
  to 25 mph. 

* HUMIDITY...33 to 37 percent.

* IMPACTS...any fires that develop will likely spread rapidly. 
  Outdoor burning is not recommended.


PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Red Flag Warning means that critical fire weather conditions
are either occurring now....or will shortly. A combination of
strong winds...low relative humidity...and warm temperatures can
contribute to extreme fire behavior.

&&

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 10, 2:49 AM EDTSmall Craft AdvisoryMLB25 hr
Apr 10, 3:29 AM EDTBeach Hazards StatementMLBVolusia16 hr
Apr 10, 5:08 PM EDTSpecial Weather StatementMLBLake, Orange82 min
Apr 10, 5:56 PM EDTSpecial Weather StatementMLBBrevard, Seminole, Volusia64 min
Apr 10, 6:06 PM EDTSpecial Marine WarningMLB84 min
Apr 10, 6:33 PM EDTSpecial Weather StatementMLBOkeechobee, Osceola87 min
Apr 10, 6:56 PM EDTSpecial Marine WarningMLB94 min
Apr 10, 7:12 PM EDTSpecial Weather StatementMLBIndian River, Martin, Saint Lucie63 min
Apr 10, 7:31 PM EDTSpecial Marine WarningMLB89 min

Nearby

Red Flag Warnings in Florida, 2021Every red flag warning in 2021

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.