Alert archive / Florida / Red Flag Warnings in 2009
Red Flag Warning 39, NWS Miami, FL
NWS Miami, FL issued this red flag warning at Apr 30, 2009, 5:50 AM EDT for Collier County, Florida. It took effect at Apr 30, 2009, 12:00 PM EDT. It was in force for 8 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 30, 2009, 5:50 AM EDT (09:50 UTC)
- In effect from
- Apr 30, 2009, 12:00 PM EDT
- Expired
- Apr 30, 2009, 8:00 PM EDT
- In force
- 8 hr
- Issued by
- NWS Miami, FL
County Collier County, FL
The radar
The Miami radar (KAMX), 111 km from the middle of the area, began a volume at 09:50 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, 9.8 hours before the alert went out and 113 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
- 154 J/kg
- Mixed-layer CIN
- -5 J/kg
- Mixed-layer LCL
- 937 m above ground
- 0-6 km bulk shear
- 13 kt
- 0-1 km storm-relative helicity
- -12 m²/s²
- 0-3 km storm-relative helicity
- 8 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 WWUS82 KMFL 300950 RFWMFL URGENT - FIRE WEATHER MESSAGE NATIONAL WEATHER SERVICE MIAMI FL 550 AM EDT THU APR 30 2009 ...RED FLAG WARNING IN EFFECT FOR GLADES, HENDRY, AND COLLIER COUNTIES FROM NOON TODAY UNTIL 8 PM THIS EVENING DUE TO A COMBINATION OF RELATIVE HUMIDITY FALLING TO OR SLIGHTLY BELOW 35 PERCENT, 20 FOOT WINDS AROUND 15 MPH, AND HIGH DISPERSION INDICES... FLZ063-066-069-070-010000- /O.UPG.KMFL.FW.A.0030.090430T1600Z-090501T0000Z/ /O.NEW.KMFL.FW.W.0039.090430T1600Z-090501T0000Z/ GLADES-HENDRY-COASTAL COLLIER-INLAND COLLIER- 550 AM EDT THU APR 30 2009 ...RED FLAG WARNING IN EFFECT FROM NOON TODAY TO 8 PM EDT THIS EVENING... THE NATIONAL WEATHER SERVICE IN MIAMI HAS ISSUED A RED FLAG WARNING...WHICH IS IN EFFECT FROM NOON TODAY TO 8 PM EDT THIS EVENING. THIS WARNING IS AN UPGRADE OF THE PREVIOUSLY ISSUED FIRE WEATHER WATCH FOR THE SAME GEOGRAPHIC AREA. RELATIVE HUMIDITIES WILL LIKELY FALL TO 35 PERCENT OR EVEN SLIGHTLY LOWER ACROSS PORTIONS OF GLADES...HENDRY AND COLLIER COUNTIES FROM EARLY TO MID AFTERNOON. THE LOW VALUES OF RELATIVE HUMIDITY...WHEN COMBINED WITH EASTERLY TRANSPORT LAYER WINDS AROUND 15 MPH AND HIGH DISPERSION INDICES...HAS PROMPTED THE ISSUANCE OF A RED FLAG WARNING. DANGEROUS FIRE GROWTH CONDITIONS ARE POSSIBLE IN REGIONS WHERE THE RELATIVE HUMIDITY DROPS TO OR SLIGHTLY BELOW 35 PERCENT THIS AFTERNOON. 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. && $$ 70/DD
1 follow-up statement
000 WWUS82 KMFL 301854 RFWMFL URGENT - FIRE WEATHER MESSAGE NATIONAL WEATHER SERVICE MIAMI FL 254 PM EDT THU APR 30 2009 ...RED FLAG WARNING IN EFFECT FOR GLADES...HENDRY...AND COLLIER COUNTIES UNTIL 8 PM THIS EVENING DUE TO A COMBINATION OF RELATIVE HUMIDITY FALLING TO OR SLIGHTLY BELOW 35 PERCENT...20 FOOT WINDS AROUND 15 MPH...AND HIGH DISPERSION INDICES... ...FIRE WEATHER WATCH FOR FRIDAY AFTERNOON INTO FRIDAY EVENING FOR GLADES...HENDRY...AND NORTHERN COLLIER COUNTIES FOR RELATIVE HUMIDITIES BELOW 35 PERCENT FOR 4 HOURS OR MORE... FLZ063-066-070-011000- /O.NEW.KMFL.FW.A.0031.090501T1700Z-090501T2300Z/ /O.CON.KMFL.FW.W.0039.000000T0000Z-090501T0000Z/ GLADES-HENDRY-INLAND COLLIER- 254 PM EDT THU APR 30 2009 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 8 PM EDT THIS EVENING FOR A COMBINATION OF RELATIVE HUMIDITY FALLING TO OR SLIGHTLY BELOW 35 PERCENT...20 FOOT WINDS AROUND 15 MPH...AND HIGH DISPERSION INDICES FOR GLADES...HENDRY...AND INLAND COLLIER COUNTIES... ...FIRE WEATHER WATCH IN EFFECT FROM FRIDAY AFTERNOON THROUGH FRIDAY EVENING FOR RELATIVE HUMIDITIES BELOW 35 PERCENT FOR 4 HOURS OR MORE FOR GLADES...HENDRY...AND NORTHERN INLAND COLLIER COUNTIES... THE NATIONAL WEATHER SERVICE IN MIAMI HAS ISSUED A FIRE WEATHER WATCH...WHICH IS IN EFFECT FROM FRIDAY AFTERNOON THROUGH FRIDAY EVENING. A RED FLAG WARNING REMAINS IN EFFECT UNTIL 8 PM EDT THIS EVENING. RELATIVE HUMIDITIES WILL LIKELY CONTINUE TO FALL BELOW 35 PERCENT ACROSS PORTIONS OF GLADES...HENDRY AND INLAND COLLIER COUNTIES THIS AFTERNOON INTO THIS EVENING. THE LOW VALUES OF RELATIVE HUMIDITY...WHEN COMBINED WITH EASTERLY TRANSPORT LAYER WINDS AROUND 15 MPH AND HIGH DISPERSION INDICES...HAS KEPT THE RED FLAG WARNING GOING UNTIL 8 PM EDT THIS EVENING FOR GLADES...HENDRY...AND INLAND COLLIER COUNTIES. DANGEROUS FIRE GROWTH CONDITIONS ARE POSSIBLE IN REGIONS WHERE THE RELATIVE HUMIDITY DROPS TO OR SLIGHTLY BELOW 35 PERCENT THIS AFTERNOON. TEMPS WILL ONCE AGAIN WARM UP TO AROUND 90 WITH DEW POINTS FALLING INTO THE MID TO UPPER 50S OVER GLADES...HENDRY...AND NORTHERN COLLIER COUNTIES. THIS WILL ALLOW FOR THE RELATIVE HUMIDITIES ON FRIDAY AFTERNOON INTO FRIDAY EVENING TO FALL BELOW 35 PERCENT FOR 4 HOURS OR MORE OVER THESE AREAS. THEREFORE...A FIRE WEATHER WATCH HAS BEEN ISSUED FOR GLADES...HENDRY...AND NORTHERN COLLIER COUNTIES FOR FRIDAY AFTERNOON INTO FRIDAY EVENING. 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. A FIRE WEATHER WATCH MEANS THAT CRITICAL FIRE WEATHER CONDITIONS ARE FORECAST TO OCCUR. LISTEN FOR LATER FORECASTS AND POSSIBLE RED FLAG WARNINGS. && $$ FLZ069-010000- /O.CON.KMFL.FW.W.0039.000000T0000Z-090501T0000Z/ COASTAL COLLIER- 254 PM EDT THU APR 30 2009 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 8 PM EDT THIS EVENING FOR A COMBINATION OF RELATIVE HUMIDITY FALLING TO OR SLIGHTLY BELOW 35 PERCENT...20 FOOT WINDS AROUND 15 MPH...AND HIGH DISPERSION INDICES FOR COASTAL COLLIER COUNTY... RELATIVE HUMIDITIES WILL LIKELY CONTINUE TO FALL BELOW 35 PERCENT ACROSS PORTIONS OF THE METRO COLLIER COUNTY THIS AFTERNOON INTO THIS EVENING. THE LOW VALUES OF RELATIVE HUMIDITY...WHEN COMBINED WITH EASTERLY TRANSPORT LAYER WINDS AROUND 15 MPH AND HIGH DISPERSION INDICES...HAS KEPT THE RED FLAG WARNING GOING UNTIL 8 PM EDT THIS EVENING FOR THIS AREA. DANGEROUS FIRE GROWTH CONDITIONS ARE POSSIBLE IN REGIONS WHERE THE RELATIVE HUMIDITY DROPS TO OR SLIGHTLY BELOW 35 PERCENT THIS AFTERNOON. 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. && $$ BAXTER
The office that day
Everything else NWS Miami, FL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 30, 2:54 PM EDT | Fire Weather Watch | MFL | 13 hr |
Nearby
Red Flag Warnings in Florida, 2009Every red flag warning in 2009
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.