Alert archive / Florida / Red Flag Warnings in 2011

Red Flag Warning 74, NWS Tallahassee, FL

June 11, 20118 counties in Florida

NWS Tallahassee, FL issued this red flag warning at Jun 11, 2011, 4:04 AM EDT for 8 counties in Florida. It took effect at Jun 11, 2011, 2:00 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
Jun 11, 2011, 4:04 AM EDT (08:04 UTC)
In effect from
Jun 11, 2011, 2:00 PM EDT
Expired
Jun 11, 2011, 6:00 PM EDT
In force
4 hr
Issued by
NWS Tallahassee, FL

Counties Gadsden County, FL, Holmes County, FL, Jackson County, FL, Jefferson County, FL, Leon County, FL, Madison County, FL, Walton County, FL, Washington County, FL

The radar

The Tallahassee radar (KTLH), 58 km from the middle of the area, began a volume at 08:05 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

Tallahassee Rgnl, FL (KTLH), launched 00:00Z, 8.1 hours before the alert went out and 61 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, Tallahassee Rgnl, FL at 00:00Z on 2011-06-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1853 joules per kilogram.LCLLFCEL10008507005003002001001 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, Tallahassee Rgnl, FL at 00:00Z on 2011-06-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 31 square meters per square second.1939Sfc1 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
1853 J/kg
Mixed-layer CIN
-27 J/kg
Mixed-layer LCL
1544 m above ground
0-6 km bulk shear
20 kt
0-1 km storm-relative helicity
31 m²/s²
0-3 km storm-relative helicity
70 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.

640 
WWUS82 KTAE 110804
RFWTAE

URGENT - FIRE WEATHER MESSAGE
NATIONAL WEATHER SERVICE TALLAHASSEE FL
404 AM EDT SAT JUN 11 2011

...A RED FLAG WARNING IS IN EFFECT FOR THIS AFTERNOON FOR PORTIONS
OF THE INLAND FLORIDA BIG BEND AND PANHANDLE DUE TO LONG DURATIONS
OF RELATIVE HUMIDITIES BELOW 35 PERCENT AND ERC VALUES ABOVE 34...

.MOISTURE WILL CONTINUE TO SLOWLY INCREASE ACROSS THE TRI- STATE
AREA THIS WEEKEND. HOWEVER...FOR TODAY WITH STRONG HEATING...
RELATIVE HUMIDITIES ARE STILL EXPECTED TO DROP TO CRITICAL LEVELS
OVER PORTIONS OF THE EASTERN FLORIDA PANHANDLE AND BIG BEND THAT
BORDER ON ALABAMA AND GEORGIA. THUS A RED FLAG WARNING WAS ISSUED.
FOR SUNDAY...THERE WILL BE AN INCREASE IN SHOWER AND THUNDERSTORM
ACTIVITY...ESPECIALLY IN AREAS AFFECTED BY THE AFTERNOON SEA
BREEZE...AND NO RED FLAG CONDITIONS ARE EXPECTED. ON MONDAY...
INLAND TEMPERATURES APPROACHING THE CENTURY MARK WILL GENERATE
LOWER HUMIDITIES AND RED FLAG CONDITIONS ARE POSSIBLE ACROSS
INLAND COUNTIES. RED FLAG LEVELS ARE NOT ANTICIPATED DURING THE
REST OF THE WORK WEEK.

FLZ009-011-016>019-112200-
/O.UPG.KTAE.FW.A.0060.110611T1800Z-110611T2200Z/
/O.NEW.KTAE.FW.W.0074.110611T1800Z-110611T2200Z/
HOLMES-JACKSON-GADSDEN-LEON-INLAND JEFFERSON-MADISON-
404 AM EDT SAT JUN 11 2011 /304 AM CDT SAT JUN 11 2011/

...A RED FLAG WARNING IN EFFECT FROM 2 PM EDT /1 PM CDT/ THIS
AFTERNOON TO 6 PM EDT /5 PM CDT/ THIS EVENING DUE TO LONG
DURATIONS OF RELATIVE HUMIDITIES BELOW 35 PERCENT AND ERC VALUES
ABOVE 34...

THE NATIONAL WEATHER SERVICE IN TALLAHASSEE HAS ISSUED A RED FLAG
WARNING...WHICH IS IN EFFECT FROM 2 PM EDT /1 PM CDT/ THIS
AFTERNOON TO 6 PM EDT /5 PM CDT/ THIS EVENING. THE FIRE WEATHER
WATCH IS NO LONGER IN EFFECT. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A RED FLAG WARNING MEANS THAT CRITICAL FIRE WEATHER CONDITIONS
ARE EITHER OCCURRING NOW...OR WILL SHORTLY. LOW RELATIVE HUMIDITY
WILL ENHANCE FIRE GROWTH POTENTIAL.

&&

$$

FLZ007-010-112200-
/O.NEW.KTAE.FW.W.0074.110611T1800Z-110611T2200Z/
INLAND WALTON-WASHINGTON-
304 AM CDT SAT JUN 11 2011

...A RED FLAG WARNING IS IN EFFECT FROM 1 PM TO 5 PM CDT THIS
AFTERNOON FOR DUE TO LONG DURATIONS OF RELATIVE HUMIDITIES BELOW
35 PERCENT AND ERC VALUES ABOVE 34...

THE NATIONAL WEATHER SERVICE IN TALLAHASSEE HAS ISSUED A RED FLAG
WARNING...WHICH IS IN EFFECT FROM 1 PM TO 5 PM CDT THIS
AFTERNOON. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A RED FLAG WARNING MEANS THAT CRITICAL FIRE WEATHER CONDITIONS
ARE EITHER OCCURRING NOW...OR WILL SHORTLY. LOW RELATIVE HUMIDITY
WILL ENHANCE FIRE GROWTH POTENTIAL.

&&

$$

BLOCK

The office that day

Everything else NWS Tallahassee, FL issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jun 11, 4:12 PM EDTSpecial Weather StatementTAELafayette33 min

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.