Alert archive / Florida / Red Flag Warnings in 2017

Red Flag Warning 9, NWS Melbourne, FL

April 26, 20174 counties in Florida

NWS Melbourne, FL issued this red flag warning at Apr 26, 2017, 10:08 AM EDT for 4 counties in Florida. It was in force for 10 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 26, 2017, 10:08 AM EDT (14:08 UTC)
Expired
Apr 26, 2017, 8:00 PM EDT
In force
10 hr
Issued by
NWS Melbourne, FL

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

The radar

The Melbourne radar (KMLB), 82 km from the middle of the area, began a volume at 14:06 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, 2.1 hours before the alert went out and 84 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 2017-04-26Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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 2017-04-26The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 36 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
1289 m above ground
0-6 km bulk shear
15 kt
0-1 km storm-relative helicity
36 m²/s²
0-3 km storm-relative helicity
29 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

433 
WWUS82 KMLB 261408
RFWMLB

URGENT - FIRE WEATHER MESSAGE
National Weather Service Melbourne FL
1008 AM EDT Wed Apr 26 2017

...Dry air will maintain a high fire danger across east central
Florida today...

FLZ044>046-053-144-270000-
/O.NEW.KMLB.FW.W.0009.170426T1408Z-170427T0000Z/
Northern Lake County-Orange-Seminole-Osceola-Southern Lake County-
1008 AM EDT Wed Apr 26 2017

...RED FLAG WARNING IN EFFECT UNTIL 8 PM EDT THIS EVENING FOR LOW
RELATIVE HUMIDITY PLUS HIGH ERC VALUES FOR LAKE, SEMINOLE, ORANGE, AND
OSCEOLA 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...Lake, Seminole, Orange, and Osceola counties.
 
* HUMIDITY...25 to 30 percent for 4 to 6 hours today. 

* IMPACTS...Any new or existing fires will 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.

&&

$$

Ulrich

Nearby

Red Flag Warnings in Florida, 2017Every red flag 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.