Alert archive / Florida / Red Flag Warnings in 2011

Red Flag Warning 80, NWS Tallahassee, FL

August 16, 2011Leon County, Wakulla County, Florida

NWS Tallahassee, FL issued this red flag warning at Aug 16, 2011, 3:17 AM EDT for Leon County, Wakulla County, Florida. It took effect at Aug 16, 2011, 2:00 PM EDT. It was in force for 5 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: Aug 16, 2011, 3:17 AM EDT (07:17 UTC)
In effect from: Aug 16, 2011, 2:00 PM EDT
Expired: Aug 16, 2011, 7:00 PM EDT
In force: 5 hr
Issued by: NWS Tallahassee, FL

Counties Leon County, FL, Wakulla County, FL

The radar

The Tallahassee radar (KTLH), 11 km from the middle of the area, began a volume at 07:16 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, 7.3 hours before the alert went out and 11 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 2456 m above ground
0-6 km bulk shear: 18 kt
0-1 km storm-relative helicity: 24 m²/s²
0-3 km storm-relative helicity: 17 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.

614 
WWUS82 KTAE 160717
RFWTAE

URGENT - FIRE WEATHER MESSAGE
NATIONAL WEATHER SERVICE TALLAHASSEE FL
317 AM EDT TUE AUG 16 2011

...A RED FLAG WARNING IS IN EFFECT FOR THIS AFTERNOON FOR LEON
AND INLAND WAKULLA COUNTIES DUE TO EXPECTED LONG DURATIONS OF
LOW RELATIVE HUMIDITIES COMBINED WITH HIGH ERC VALUES...

.A NOTICEABLY DRIER AIR MASS CONTINUES TO FILTER IN BEHIND A COLD
FRONT. LONG DURATIONS OF LOW RELATIVE HUMIDITY VALUES ARE
EXPECTED OVER PORTIONS OF THE INLAND PANHANDLE AND INLAND BIG
BEND LATER TODAY. HIGH MIXING HEIGHTS WILL BE OFFSET BY WEAK
TRANSPORT WINDS KEEPING DISPERSION VALUES WELL BELOW 75 EVERYWHERE.
HOWEVER...ERC VALUES WILL LIKELY BE AT OR ABOVE 35 ACROSS
LEON AND WAKULLA COUNTIES. THEREFORE THE FIRE WEATHER WATCH HAS
BEEN UPGRADED TO A RED FLAG WARNING FOR THESE COUNTIES. AFTER
TODAY...RED FLAG CONDITIONS ARE NOT EXPECTED FOR THE REMAINDER OF
THE WEEK.

FLZ017-027-162300-
/O.UPG.KTAE.FW.A.0064.110816T1800Z-110816T2300Z/
/O.NEW.KTAE.FW.W.0080.110816T1800Z-110816T2300Z/
LEON-INLAND WAKULLA-
317 AM EDT TUE AUG 16 2011

...RED FLAG WARNING IN EFFECT FROM 2 PM THIS AFTERNOON TO 7 PM
EDT THIS EVENING FOR LONG DURATIONS OF LOW RELATIVE HUMIDITY
COMBINED WITH EXPECTED HIGH ERC VALUES...

THE NATIONAL WEATHER SERVICE IN TALLAHASSEE HAS ISSUED A RED FLAG
WARNING...WHICH IS IN EFFECT FROM 2 PM THIS AFTERNOON TO 7 PM EDT
THIS EVENING. THE FIRE WEATHER WATCH IS NO LONGER IN EFFECT. 

HUMIDITY...30 TO 35 PERCENT TODAY.

DISPERSION INDEX...AROUND 40.

ERC...35 OR HIGHER.

IMPACTS...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. LOW RELATIVE HUMIDITY
WILL ENHANCE FIRE GROWTH POTENTIAL.

&&

$$

BLOCK

Nearby

Red Flag Warnings in Florida, 2011 Every 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.