Alert archive / Florida / Red Flag Warnings in 2011

Red Flag Warning 12, NWS Miami, FL

March 19, 2011Broward County, Florida

NWS Miami, FL issued this red flag warning at Mar 19, 2011, 3:49 AM EDT for Broward County, Florida. It took effect at Mar 19, 2011, 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
Mar 19, 2011, 3:49 AM EDT (07:49 UTC)
In effect from
Mar 19, 2011, 12:00 PM EDT
Expired
Mar 19, 2011, 7:00 PM EDT
In force
7 hr
Issued by
NWS Miami, FL

County Broward County, FL

The radar

The Miami radar (KAMX), 60 km from the middle of the area, began a volume at 07:50 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

Miami, FL (KMFL), launched 00:00Z, 7.8 hours before the alert went out and 40 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, Miami, FL at 00:00Z on 2011-03-19Temperature 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°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Miami, FL at 00:00Z on 2011-03-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -7 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
2033 m above ground
0-6 km bulk shear
11 kt
0-1 km storm-relative helicity
-7 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.

165 
WWUS82 KMFL 190749
RFWMFL

URGENT - FIRE WEATHER MESSAGE
NATIONAL WEATHER SERVICE MIAMI FL
349 AM EDT SAT MAR 19 2011

...RED FLAG WARNING FOR INLAND BROWARD COUNTY THIS AFTERNOON...

FLZ071-191600-
/O.NEW.KMFL.FW.W.0012.110319T1600Z-110319T2300Z/
INLAND BROWARD-
349 AM EDT SAT MAR 19 2011

...RED FLAG WARNING IN EFFECT FROM NOON TODAY TO 7 PM EDT THIS
EVENING FOR INLAND BROWARD COUNTY...

THE NATIONAL WEATHER SERVICE IN MIAMI HAS ISSUED A RED FLAG
WARNING...WHICH IS IN EFFECT FROM NOON TODAY TO 7 PM EDT THIS
EVENING. 

RELATIVE HUMIDITY IS EXPECTED TO FALL BELOW 35 PERCENT FOR 4 OR
MORE CONSECUTIVE HOURS IN INLAND BROWARD COUNTY THIS AFTERNOON
THE MINIMUM RELATIVE HUMIDITY WILL BE IN THE MID 20S FOR 2 TO 3
HOURS. THE LOW RELATIVE HUMIDITY COMBINED WITH AN ERC OF 37 HAS
LEAD TO THE RED FLAG WARNING. 

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
LOW RELATIVE HUMIDITY...WARM TEMPERATURES AND AN ERC ABOVE 35 
WILL CREATE EXPLOSIVE FIRE GROWTH POTENTIAL.

&&

$$
1 follow-up statement
947 
WWUS82 KMFL 191835
RFWMFL

URGENT - FIRE WEATHER MESSAGE
NATIONAL WEATHER SERVICE MIAMI FL
235 PM EDT SAT MAR 19 2011

FLZ071-192300-
/O.CON.KMFL.FW.W.0012.000000T0000Z-110319T2300Z/
INLAND BROWARD-
235 PM EDT SAT MAR 19 2011

...RED FLAG WARNING REMAINS IN EFFECT UNTIL 7 PM EDT THIS EVENING
FOR INLAND BROWARD COUNTY...

RELATIVE HUMIDITIES BETWEEN 30 AND 34 PERCENT ARE EXPECTED
THROUGH EARLY THIS EVENING...ALONG WITH AN ENERGY RELEASE
COMPONENT AVERAGING AROUND 37. THE COMBINATION OF THESE
CONDITIONS WILL RESULT IN HIGH TO EXTREME FIRE DANGER.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A RED FLAG WARNING MEANS THAT CRITICAL FIRE WEATHER CONDITIONS
ARE EITHER OCCURRING NOW...OR WILL SHORTLY. A COMBINATION OF LOW
RELATIVE HUMIDITY...WARM TEMPERATURES AND AN ERC ABOVE 35 WILL
CREATE EXPLOSIVE FIRE GROWTH POTENTIAL.

&&

$$

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.