Alert archive / Florida / Red Flag Warnings in 2011
Red Flag Warning 15, NWS Melbourne, FL
NWS Melbourne, FL issued this red flag warning at May 5, 2011, 3:00 AM EDT for 4 counties in Florida. It took effect at May 5, 2011, 12:00 PM EDT. It was in force for 4 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 5, 2011, 3:00 AM EDT (07:00 UTC)
- In effect from
- May 5, 2011, 12:00 PM EDT
- Expired
- May 5, 2011, 3:52 PM EDT
- In force
- 4 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 07:02 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, 7.0 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.
- Mixed-layer CAPE
- 790 J/kg
- Mixed-layer CIN
- -13 J/kg
- Mixed-layer LCL
- 475 m above ground
- 0-6 km bulk shear
- 41 kt
- 0-1 km storm-relative helicity
- 98 m²/s²
- 0-3 km storm-relative helicity
- 160 m²/s²
- Significant tornado parameter
- 0.5
- Supercell composite
- 2.8
The text
As transmitted, in the capitals the NWS used until 2016.
762 WWUS82 KMLB 050700 RFWMLB URGENT - FIRE WEATHER MESSAGE NATIONAL WEATHER SERVICE MELBOURNE FL 300 AM EDT THU MAY 5 2011 FLZ044>046-053-144-052100- /O.NEW.KMLB.FW.W.0015.110505T1600Z-110505T2100Z/ NORTHERN LAKE-ORANGE-SEMINOLE-OSCEOLA-SOUTHERN LAKE- 300 AM EDT THU MAY 5 2011 ...DURATIONS OF LOW RELATIVE HUMIDITY...INCREASING ENERGY RELEASE COMPONENT AND 20 FOOT WINDS AROUND 15 MPH WILL INCREASE THE FIRE DANGER THIS AFTERNOON... THE NATIONAL WEATHER SERVICE IN MELBOURNE HAS ISSUED A RED FLAG WARNING...WHICH IS IN EFFECT FROM NOON TODAY TO 5 PM EDT THIS AFTERNOON. THE COMBINATION OF RELATIVE HUMIDITY VALUES BELOW 35 PERCENT FOR 4 OR MORE HOURS...OCCASIONAL 20 FOOT WIND GUSTS BETWEEN 15 AND 20 MPH AND ENERGY RELEASE COMPONENT VALUES RANGING FROM THE MIDDLE 30S TO LOW 40S HAS PROMPTED A RED FLAG WARNING FOR AREAS WEST OF ORLANDO THIS AFTERNOON. 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. && $$ 67
1 follow-up statement
606 WWUS82 KMLB 051952 RFWMLB URGENT - FIRE WEATHER MESSAGE NATIONAL WEATHER SERVICE MELBOURNE FL 352 PM EDT THU MAY 5 2011 FLZ044>046-053-144-052100- /O.CAN.KMLB.FW.W.0015.000000T0000Z-110505T2100Z/ NORTHERN LAKE-ORANGE-SEMINOLE-OSCEOLA-SOUTHERN LAKE- 352 PM EDT THU MAY 5 2011 ...RED FLAG WARNING IS CANCELLED... THE NATIONAL WEATHER SERVICE IN MELBOURNE HAS CANCELLED THE RED FLAG WARNING. RELATIVE HUMIDITY VALUES HAVE REMAINED ABOVE CRITICAL LEVELS UNDER THE ONSHORE FLOW TODAY SO THE RED FLAG WARNING IS NOW CANCELLED. $$ WEITLICH
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.