Alert archive / Florida / Red Flag Warnings in 2011
Red Flag Warning 11, NWS Miami, FL
NWS Miami, FL issued this red flag warning at Mar 18, 2011, 11:22 AM EDT for Broward County, Miami-Dade County, Florida. It was in force for 9 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 18, 2011, 11:22 AM EDT (15:22 UTC)
- Expired
- Mar 18, 2011, 8:00 PM EDT
- In force
- 9 hr
- Issued by
- NWS Miami, FL
Counties Broward County, FL, Miami-Dade County, FL
The radar
The Miami radar (KAMX), 31 km from the middle of the area, began a volume at 15:19 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 12:00Z, 3.4 hours before the alert went out and 20 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
- 86 J/kg
- Mixed-layer CIN
- -193 J/kg
- Mixed-layer LCL
- 867 m above ground
- 0-6 km bulk shear
- 8 kt
- 0-1 km storm-relative helicity
- -26 m²/s²
- 0-3 km storm-relative helicity
- -37 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
470 WWUS82 KMFL 181522 RFWMFL URGENT - FIRE WEATHER MESSAGE NATIONAL WEATHER SERVICE MIAMI FL 1122 AM EDT FRI MAR 18 2011 ...RED FLAG WARNING IN EFFECT FOR METRO AND INLAND SECTIONS OF BROWARD AND MIAMI-DADE COUNTIES FOR RELATIVE HUMIDITY VALUES BELOW 35 PERCENT AND WINDS ABOVE 15 MPH UNTIL 8 PM EDT... FLZ071>074-190000- /O.NEW.KMFL.FW.W.0011.110318T1522Z-110319T0000Z/ INLAND BROWARD-METRO BROWARD-INLAND MIAMI DADE-METRO MIAMI DADE- 1122 AM EDT FRI MAR 18 2011 ...RED FLAG WARNING IN EFFECT UNTIL 8 PM EDT THIS EVENING FOR HUMIDITY VALUES BELOW 35 PERCENT AND WINDS ABOVE 15 MPH FOR METRO AND INLAND SECTIONS OF BROWARD AND MIAMI-DADE COUNTIES... A VERY DRY AIRMASS WILL CONTINUE TO MIX DOWN TO THE SURFACE THROUGH THIS AFTERNOON. IN ADDITION TO THIS VERY DRY AIRMASS WHERE SOME LOCATIONS WILL EXPERIENCE RELATIVE HUMIDITY VALUES OF AROUND 20 PERCENT AND POSSIBLY LOWER, WIND SPEEDS WILL ALSO BE AROUND 15 MPH WITH GUSTS OVER 20 MPH. ALSO IN ADDITION, THE ENERGY RELEASE COMPONENT FOR BROWARD COUNTY IS FORECAST TO BE AROUND 35, BUT A SLIGHTLY LOWER VALUE OF NEAR 30 IS EXPECTED IN MIAMI-DADE COUNTY. ALL OF THESE CONDITIONS COMBINED WARRANT A RED FLAG WARNING THIS AFTERNOON FOR THE METROPOLITAN AND INLAND SECTIONS OF THE AFOREMENTIONED COUNTIES INTO EARLY EVENING. CONDITIONS WILL GRADUALLY BECOME MORE MOIST THROUGH THE LATE AFTERNOON AS ATLANTIC MOISTURE MOVES IN THE THE NORTHEAST WINDS. 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 WILL CREATE EXPLOSIVE FIRE GROWTH POTENTIAL. && $$
1 follow-up statement
250 WWUS82 KMFL 182351 RFWMFL URGENT - FIRE WEATHER MESSAGE NATIONAL WEATHER SERVICE MIAMI FL 751 PM EDT FRI MAR 18 2011 ...THE RED FLAG WARNING WILL BE ALLOWED TO EXPIRE AT 8 PM... FLZ071>074-190100- /O.EXP.KMFL.FW.W.0011.000000T0000Z-110319T0000Z/ INLAND BROWARD-METRO BROWARD-INLAND MIAMI DADE-METRO MIAMI DADE- 751 PM EDT FRI MAR 18 2011 ...RED FLAG WARNING WILL EXPIRE AT 8 PM EDT THIS EVENING... * AFFECTED AREA...FIRE WEATHER ZONES 071...072...073 AND 074. * WIND...WIND SPEEDS HAVE DECREASED TO LESS THAN 15 MPH. * HUMIDITY...RELATIVE HUMIDITY VALUES HAVE INCREASED TO ABOVE 35% AND WILL CONTINUE TO INCREASE THROUGH THIS EVENING. $$
The office that day
Everything else NWS Miami, FL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 18, 2:21 AM EDT | Dense Fog Advisory | MFL | Broward, Collier, Glades, Hendry, Miami-Dade, Monroe and 1 more | 6 hr |
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.