Alert archive / Florida / Red Flag Warnings in 2012

Red Flag Warning 10, NWS Melbourne, FL

April 10, 2012Orange County, Seminole County, Florida

NWS Melbourne, FL issued this red flag warning at Apr 10, 2012, 4:00 AM EDT for Orange County, Seminole County, Florida. It took effect at Apr 10, 2012, 12:00 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
Apr 10, 2012, 4:00 AM EDT (08:00 UTC)
In effect from
Apr 10, 2012, 12:00 PM EDT
Expired
Apr 10, 2012, 7:00 PM EDT
In force
7 hr
Issued by
NWS Melbourne, FL

Counties Orange County, FL, Seminole County, FL

The radar

The Melbourne radar (KMLB), 83 km from the middle of the area, began a volume at 07:58 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

Tampa Bay, FL (KTBW), launched 00:00Z, 8.0 hours before the alert went out and 150 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 2012-04-10Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 274 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, Tampa Bay, FL at 00:00Z on 2012-04-10The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -20 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
274 J/kg
Mixed-layer CIN
-115 J/kg
Mixed-layer LCL
1216 m above ground
0-6 km bulk shear
15 kt
0-1 km storm-relative helicity
-20 m²/s²
0-3 km storm-relative helicity
14 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

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

504 
WWUS82 KMLB 100800
RFWMLB

URGENT - FIRE WEATHER MESSAGE
NATIONAL WEATHER SERVICE MELBOURNE FL
400 AM EDT TUE APR 10 2012


FLZ045-046-102300-
/O.NEW.KMLB.FW.W.0010.120410T1600Z-120410T2300Z/
ORANGE-SEMINOLE-
400 AM EDT TUE APR 10 2012

...RED FLAG WARNING IN EFFECT FROM NOON TODAY TO 7 PM EDT THIS
EVENING FOR LONG DURATIONS OF LOW RELATIVE HUMIDITY AND HIGH ERC
VALUES FOR ORANGE AND SEMINOLE COUNTIES...

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. 

* AFFECTED AREA... ORANGE... SEMINOLE.

* WIND...WINDS WILL REMAIN RELATIVELY LIGHT AROUND 5 TO 10 MPH OUT
  OF THE SOUTH TO SOUTHWEST. 

* HUMIDITY...HUMIDITY VALUES WILL FALL BETWEEN 30 TO 35 PERCENT
  FOR 4 TO 6 HOURS. 

* IMPACTS...PROLONGED DRY CONDITIONS MAY LEAD TO WILDFIRE STARTS.
  OUTDOOR BURNING IS NOT RECOMMENDED.

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.

&&

$$

WEITLICH

Nearby

Red Flag Warnings in Florida, 2012Every red flag warning in 2012

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.