Alert archive / Florida / Red Flag Warnings in 2011

Red Flag Warning 18, NWS Melbourne, FL

May 9, 2011Okeechobee County, Florida

NWS Melbourne, FL issued this red flag warning at May 9, 2011, 4:05 AM EDT for Okeechobee County, Florida. It took effect at May 9, 2011, 1:00 PM EDT. It was in force for 7 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
May 9, 2011, 4:05 AM EDT (08:05 UTC)
In effect from
May 9, 2011, 1:00 PM EDT
Expired
May 9, 2011, 8:00 PM EDT
In force
7 hr
Issued by
NWS Melbourne, FL

County Okeechobee County, FL

The radar

The Melbourne radar (KMLB), 84 km from the middle of the area, began a volume at 08:02 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.

The nearest sounding before it

Cape Canaveral, FL (KXMR), launched 00:00Z, 8.1 hours before the alert went out and 126 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 2011-05-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 318 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, Cape Canaveral, FL at 00:00Z on 2011-05-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 85 square meters per square second.19395878Sfc1 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
318 J/kg
Mixed-layer CIN
-257 J/kg
Mixed-layer LCL
1445 m above ground
0-6 km bulk shear
24 kt
0-1 km storm-relative helicity
85 m²/s²
0-3 km storm-relative helicity
127 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.2

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

754 
WWUS82 KMLB 090805
RFWMLB

URGENT - FIRE WEATHER MESSAGE
NATIONAL WEATHER SERVICE MELBOURNE FL
405 AM EDT MON MAY 9 2011

FLZ058-100000-
/O.NEW.KMLB.FW.W.0018.110509T1700Z-110510T0000Z/
OKEECHOBEE-
405 AM EDT MON MAY 9 2011

...RED FLAG WARNING IN EFFECT FROM 1 PM THIS AFTERNOON TO 8 PM
EDT THIS EVENING...

THE NATIONAL WEATHER SERVICE IN MELBOURNE HAS ISSUED A RED FLAG
WARNING...WHICH IS IN EFFECT FROM 1 PM THIS AFTERNOON TO 8 PM EDT
THIS EVENING. 

A CONTINUED DRY AIR MASS WILL ALLOW RELATIVE HUMIDITY VALUES TO
FALL BELOW 35 PERCENT FOR 4 TO 5 HOURS THIS AFTERNOON ACROSS THE
WARNED AREA. THE ENERGY RELEASE COMPONENT VALUE WILL REMAIN AROUND
35 ACROSS OKEECHOBEE COUNTY. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A RED FLAG WARNING IS ISSUED WHEN VERY FAVORABLE CONDITIONS FOR
THE SPREAD OF WILDFIRE ARE OCCURRING NOW...OR WILL LIKELY OCCUR
WITHIN THE NEXT 24 HOURS.

&&

$$
1 follow-up statement
894 
WWUS82 KMLB 092346
RFWMLB

URGENT - FIRE WEATHER MESSAGE
NATIONAL WEATHER SERVICE MELBOURNE FL
746 PM EDT MON MAY 9 2011


FLZ058-100100-
/O.EXP.KMLB.FW.W.0018.000000T0000Z-110510T0000Z/
OKEECHOBEE-
746 PM EDT MON MAY 9 2011

...RED FLAG WARNING WILL EXPIRE AT 8 PM EDT THIS EVENING FOR
OKEECHOBEE COUNTY...

THE RED FLAG WARNING WILL EXPIRE AT 8 PM EDT THIS EVENING. 


$$

Nearby

Red Flag Warnings in Florida, 2011Every red flag warning in 2011

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.