Alert archive / Florida / Red Flag Warnings in 2011
Red Flag Warning 40, NWS Tallahassee, FL
NWS Tallahassee, FL issued this red flag warning at Apr 17, 2011, 8:49 PM EDT for Leon County, Wakulla County, Florida. It took effect at Apr 18, 2011, 1:00 PM EDT. It was in force for 2 min. 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 17, 2011, 8:49 PM EDT (00:49 UTC)
- In effect from
- Apr 18, 2011, 1:00 PM EDT
- Expired
- Apr 18, 2011, 1:02 PM EDT
- In force
- 2 min
- 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 00:46 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, 0.8 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.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 2900 m above ground
- 0-6 km bulk shear
- 44 kt
- 0-1 km storm-relative helicity
- -17 m²/s²
- 0-3 km storm-relative helicity
- 27 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
030 WWUS82 KTAE 180049 RFWTAE URGENT - FIRE WEATHER MESSAGE NATIONAL WEATHER SERVICE TALLAHASSEE FL 849 PM EDT SUN APR 17 2011 ...RED FLAG WARNING IS NOW IN EFFECT FROM 1 PM EDT TO 8 PM EDT TODAY FOR LEON AND WAKULLA COUNTIES DUE TO THE COMBINATION OF HIGH ERC AND LONG DURATIONS OF LOW RELATIVE HUMIDITY... .UPDATE... THE LATEST ENERGY RELEASE COMPONENT FORECAST THIS EVENING HAS PORTIONS OF NORTHWEST FLORIDA REACHING THE 30 TO 35 RANGE (35 FOR LEON/WAKULLA COUNTY). THEREFORE...A RED FLAG WARNING WILL BE ISSUED FOR LEON COUNTY AND A RED FLAG STATEMENT ACROSS MUCH OF THE INLAND FLORIDA PANHANDLE COUNTIES FOR TOMORROW AFTERNOON. FLZ017-027-181000- /O.NEW.KTAE.FW.W.0040.110418T1700Z-110418T2300Z/ LEON-INLAND WAKULLA- 849 PM EDT SUN APR 17 2011 ...RED FLAG WARNING IN EFFECT FROM 1 PM TO 7 PM EDT MONDAY FOR LEON AND WAKULLA COUNTIES... 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. && $$
2 follow-up statements
515 WWUS82 KTAE 180810 RFWTAE URGENT - FIRE WEATHER MESSAGE NATIONAL WEATHER SERVICE TALLAHASSEE FL 410 AM EDT MON APR 18 2011 ...A RED FLAG WARNING REMAINS IN EFFECT FROM 1 PM THIS AFTERNOON UNTIL 7 PM EDT THIS EVENING FOR LEON COUNTY IN THE FLORIDA BIG BEND DUE TO LONG DURATIONS OF LOW RELATIVE HUMIDITY AND FORECAST ERC VALUES OF 35 OR GREATER... ...THE RED FLAG WARNING FOR INLAND WAKULLA COUNTY IN THE FLORIDA BIG BEND HAS BEEN CANCELLED FOR THIS AFTERNOON... .DISCUSSION...WITH ONSHORE FLOW CONTINUING TO BECOME MORE PREVALENT ACROSS THE TRI-STATE AREA DURING THE NEXT FEW DAYS AS THE RIDGE OF HIGH PRESSURE AT THE SURFACE GRADUALLY SLIDES OFF TO OUR EAST...DEWPOINTS ARE EXPECTED TO INCREASE AT A HIGHER RATE THAN SURFACE TEMPERATURES. THIS SHOULD RESULT IN HIGHER AFTERNOON RELATIVE HUMIDITIES ON TUESDAY AND WEDNESDAY THAN TODAY...SO TODAY WILL LIKELY BE THE LAST DAY FOR THE CURRENT RED FLAG WARNINGS AND FIRE WEATHER STATEMENTS UNTIL THE SYNOPTIC PATTERN CHANGES...WHICH DOES NOT APPEAR LIKELY FOR AT LEAST THE NEXT SEVERAL DAYS. ALSO... WITH NEW HIGHER RELATIVE HUMIDITY VALUES FOR THIS AFTERNOON NEAR THE COAST DUE TO THE ONSHORE FLOW...IT NOW NO LONGER APPEARS THAT WAKULLA COUNTY WILL REACH 4 HOUR DURATIONS OF SUB 35 PERCENT RELATIVE HUMIDITY. THEREFORE...LEON COUNTY FLORIDA WILL BE THE ONLY WARNED COUNTY IN THE CWA TODAY. FLZ027-180915- /O.CAN.KTAE.FW.W.0040.110418T1700Z-110418T2300Z/ INLAND WAKULLA- 410 AM EDT MON APR 18 2011 ...THE RED FLAG WARNING HAS BEEN CANCELLED FOR THIS AFTERNOON... THE NATIONAL WEATHER SERVICE IN TALLAHASSEE HAS CANCELLED THE RED FLAG WARNING DUE TO ONLY BRIEF DURATIONS OF SUB 35 PERCENT RELATIVE HUMIDITY. $$ FLZ017-182300- /O.CON.KTAE.FW.W.0040.110418T1700Z-110418T2300Z/ LEON- 410 AM EDT MON APR 18 2011 ...A RED FLAG WARNING REMAINS IN EFFECT FROM 1 PM THIS AFTERNOON TO 7 PM EDT THIS EVENING... 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. && $$ 17-GOULD
519 WWUS82 KTAE 181702 RFWTAE URGENT - FIRE WEATHER MESSAGE NATIONAL WEATHER SERVICE TALLAHASSEE FL 102 PM EDT MON APR 18 2011 ...RED FLAG WARNING IS CANCELLED FOR LEON COUNTY... .GRADUALLY INCREASING MOISTURE WILL LIKELY PREVENT RH VALUES FROM FALLING BELOW 35 PERCENT FOR 4 HOURS THIS AFTERNOON. FLZ017-181815- /O.CAN.KTAE.FW.W.0040.000000T0000Z-110418T2300Z/ LEON- 102 PM EDT MON APR 18 2011 ...RED FLAG WARNING IS CANCELLED FOR LEON COUNTY... THE NATIONAL WEATHER SERVICE IN TALLAHASSEE HAS CANCELLED THE RED FLAG WARNING. $$ FOURNIER
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.