Alert archive / Florida / Red Flag Warnings in 2018

Red Flag Warning 13, NWS Melbourne, FL

April 16, 2018Orange County, Osceola County, Seminole County, Florida

NWS Melbourne, FL issued this red flag warning at Apr 16, 2018, 11:38 AM EDT for Orange County, Osceola County, Seminole County, Florida. It took effect at Apr 16, 2018, 12:00 PM EDT. It was in force for 8 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
Apr 16, 2018, 11:38 AM EDT (15:38 UTC)
In effect from
Apr 16, 2018, 12:00 PM EDT
Expired
Apr 16, 2018, 8:00 PM EDT
In force
8 hr
Issued by
NWS Melbourne, FL

Counties Orange County, FL, Osceola County, FL, Seminole County, FL

The radar

The Melbourne radar (KMLB), 67 km from the middle of the area, began a volume at 15:38 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, 3.6 hours before the alert went out and 72 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 2018-04-16Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1 joules per kilogram.LCLEL10008507005003002001001 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 2018-04-16The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -33 square meters per square second.1939587897Sfc1 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
1 J/kg
Mixed-layer CIN
-6 J/kg
Mixed-layer LCL
975 m above ground
0-6 km bulk shear
29 kt
0-1 km storm-relative helicity
-33 m²/s²
0-3 km storm-relative helicity
11 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

865 
WWUS82 KMLB 161538
RFWMLB

URGENT - FIRE WEATHER MESSAGE
National Weather Service Melbourne FL
1138 AM EDT Mon Apr 16 2018

...RED FLAG WARNING IN EFFECT FROM NOON UNTIL 800 PM...

FLZ045>047-053-054-147-170000-
/O.NEW.KMLB.FW.W.0013.180416T1600Z-180417T0000Z/
Orange-Seminole-Southern Brevard County-Osceola-Indian River-
Northern Brevard County-
1138 AM EDT Mon Apr 16 2018

...RED FLAG WARNING IN EFFECT UNTIL 8 PM THIS EVENING FOR
SEMINOLE, ORANGE, OSCEOLA, BREVARD AND INDIAN RIVER COUNTIES...

The National Weather Service in Melbourne has issued a Red Flag
Warning, which is in effect until 8 PM EDT this evening. 

* AFFECTED AREA... Orange... Seminole... Southern Brevard 
  County... Osceola... Indian River... Northern Brevard County. 

* WIND...15 to 20 mph.

* HUMIDITY...Between 25 and 30 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 15, 8:14 PM EDTSpecial Weather StatementMLBMartin46 min
Apr 16, 10:16 AM EDTSmall Craft AdvisoryMLB5 hr

Nearby

Red Flag Warnings in Florida, 2018Every red flag warning in 2018

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.