Alert archive / Florida / Red Flag Warnings in 2011
Red Flag Warning 10, NWS Tampa Bay, FL
NWS Tampa Bay, FL issued this red flag warning at Feb 15, 2011, 12:31 PM EST for 5 counties in Florida. It was in force for 6 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
- Feb 15, 2011, 12:31 PM EST (17:31 UTC)
- Expired
- Feb 15, 2011, 7:00 PM EST
- In force
- 6 hr
- Issued by
- NWS Tampa Bay, FL
Counties DeSoto County, FL, Hardee County, FL, Highlands County, FL, Polk County, FL, Sumter County, FL
The radar
The Tampa radar (KTBW), 64 km from the middle of the area, began a volume at 17:30 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
Tampa Bay, FL (KTBW), launched 12:00Z, 5.5 hours before the alert went out and 64 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
- 1534 m above ground
- 0-6 km bulk shear
- 15 kt
- 0-1 km storm-relative helicity
- -10 m²/s²
- 0-3 km storm-relative helicity
- 93 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
902 WWUS82 KTBW 151731 RFWTBW URGENT - FIRE WEATHER MESSAGE NATIONAL WEATHER SERVICE TAMPA BAY AREA - RUSKIN FL 1231 PM EST TUE FEB 15 2011 ...RED FLAG WARNING IN EFFECT THROUGH 7 PM EST THIS EVENING... .DRY AIR IS MIXING DOWN TO THE SURFACE RESULTING IN HUMIDITIES BELOW 35 PERCENT. FLZ039-042-043-048-062-065-160000- /O.NEW.KTBW.FW.W.0010.110215T1731Z-110216T0000Z/ LEVY-CITRUS-SUMTER-HERNANDO-CHARLOTTE-LEE- 1231 PM EST TUE FEB 15 2011 ...RED FLAG WARNING IN EFFECT UNTIL 7 PM EST THIS EVENING... THE NATIONAL WEATHER SERVICE IN TAMPA BAY AREA - RUSKIN FL HAS ISSUED A RED FLAG WARNING...WHICH IS IN EFFECT UNTIL 7 PM EST THIS EVENING. RELATIVE HUMIDITIES HAVE FALLEN BELOW 35 PERCENT ACROSS THE NATURE COAST AND ARE APPROACHING 35 PERCENT IN CHARLOTTE AND LEE COUNTIES. RELATIVE HUMIDITIES WILL CONTINUE TO FALL AS TEMPERATURES RISE INTO THE 70S TODAY. LOWEST HUMIDITIES SHOULD BE BETWEEN 25 AND 30 PERCENT THEN QUICKLY RISE ABOVE CRITICAL VALUES TOWARD SUNSET. PRECAUTIONARY/PREPAREDNESS ACTIONS... A RED FLAG WARNING IS ISSUED WHEN VERY FAVORABLE CONDITIONS FOR THE SPREAD OF WILDFIRE ARE OCCURRING NOW...OR WILL OCCUR WITHIN 24 HOURS. && $$
1 follow-up statement
711 WWUS82 KTBW 151915 RFWTBW URGENT - FIRE WEATHER MESSAGE NATIONAL WEATHER SERVICE TAMPA BAY AREA - RUSKIN FL 215 PM EST TUE FEB 15 2011 ...RED FLAG WARNING IN EFFECT THROUGH 7 PM EST THIS EVENING... .DRY AIR IS MIXING DOWN TO THE SURFACE RESULTING IN HUMIDITIES BELOW 35 PERCENT. FLZ049-051-052-055>057-060-061-160000- /O.EXA.KTBW.FW.W.0010.000000T0000Z-110216T0000Z/ PASCO-HILLSBOROUGH-POLK-MANATEE-HARDEE-HIGHLANDS-SARASOTA-DE SOTO- 215 PM EST TUE FEB 15 2011 ...RED FLAG WARNING IN EFFECT UNTIL 7 PM EST THIS EVENING... THE NATIONAL WEATHER SERVICE IN TAMPA BAY AREA - RUSKIN FL HAS ISSUED A RED FLAG WARNING...WHICH IS IN EFFECT UNTIL 7 PM EST THIS EVENING. RELATIVE HUMIDITIES HAVE FALLEN BELOW 35 PERCENT ACROSS SOUTHWEST AND SOUTH-CENTRAL FLORIDA. RELATIVE HUMIDITIES WILL CONTINUE TO FALL AS TEMPERATURES RISE INTO THE 70S TODAY. LOWEST HUMIDITIES SHOULD BE BETWEEN 25 AND 30 PERCENT THEN QUICKLY RISE ABOVE CRITICAL VALUES AROUND SUNSET. PRECAUTIONARY/PREPAREDNESS ACTIONS... A RED FLAG WARNING IS ISSUED WHEN VERY FAVORABLE CONDITIONS FOR THE SPREAD OF WILDFIRE ARE OCCURRING NOW...OR WILL OCCUR WITHIN 24 HOURS. && $$ FLZ039-042-043-048-062-065-160000- /O.CON.KTBW.FW.W.0010.000000T0000Z-110216T0000Z/ LEVY-CITRUS-SUMTER-HERNANDO-CHARLOTTE-LEE- 215 PM EST TUE FEB 15 2011 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 7 PM EST THIS EVENING... A RED FLAG WARNING REMAINS IN EFFECT UNTIL 7 PM EST THIS EVENING. RELATIVE HUMIDITIES HAVE FALLEN BELOW 35 PERCENT ACROSS THE NATURE COAST AND IN CHARLOTTE AND LEE COUNTIES. RELATIVE HUMIDITIES WILL CONTINUE TO FALL AS TEMPERATURES RISE INTO THE 70S TODAY. LOWEST HUMIDITIES SHOULD BE BETWEEN 25 AND 30 PERCENT THEN QUICKLY RISE ABOVE CRITICAL VALUES AROUND SUNSET. PRECAUTIONARY/PREPAREDNESS ACTIONS... A RED FLAG WARNING IS ISSUED WHEN VERY FAVORABLE CONDITIONS FOR THE SPREAD OF WILDFIRE ARE OCCURRING NOW...OR WILL OCCUR WITHIN 24 HOURS. && $$
What forecasters said that day
The local office's own words before this red flag warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Tampa Bay, FL wrote its last area forecast discussion before this red flag warning went out at Feb 15, 9:23 AM EST, 3 hours 8 minutes earlier.
Area forecast discussion, Feb 15, 9:23 AM EST, 3 hours 8 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE TAMPA BAY RUSKIN FL 923 AM EST TUE FEB 15 2011 .DISCUSSION...VERY SHALLOW BUT LOCALLY DENSE FOG DEVELOPED BEFORE SUNRISE RESULTING IN VISIBILITIES BELOW A QUARTER MILE IN PLACES. THIS FOG HAS SINCE BURNED OFF WITH SUNNY SKIES AND RAPIDLY RISING TEMPERATURES. IT WAS A LITTLE COOLER THAN EXPECTED OVERNIGHT...BUT THIS WILL HAVE LITTLE IMPACT ON OUR AFTERNOON HIGH TEMPERATURES. THE CURRENT FORECAST LOOKS ON TRACK WITH HIGHS NEAR 70 NORTH...LOWER 70S CENTRAL AND MIDDLE 70S TO THE SOUTH. AN AFTERNOON SEA BREEZE WILL KEEP THE COAST COOLER SOUTH OF TAMPA BAY...BUT THE DEVELOPING EASTERLIES MAY BE STRONG ENOUGH TO NEGATE A SEA BREEZE TO THE NORTH. NO UPDATES ARE PLANNED TO THE TEXT ZONES AT THIS TIME. && .AVIATION... SHALLOW FOG EARLIER THIS MORNING BROUGHT VISIBILITIES DOWN AT THE NORTHERN THREE SITES...BUT CONDITIONS ARE IMPROVING AND VISIBILITIES WILL CONTINUE TO GO UP AS THE FOG BURNS OFF. VFR CONDITIONS ARE EXPECTED FOR THE NEXT 24 HOURS WITH WINDS BECOMING MORE NORTHEAST LATER TODAY. && .MARINE...NORTH WINDS AROUND 10 KNOTS WITH SEAS AROUND 2 FEET CONTINUE THROUGH THE DAY. WINDS WILL TURN MORE EASTERLY AND INCREASE TO 15 KNOTS OR SO TONIGHT AS AN EASTERLY SURGE MOVES THROUGH THE WATERS. CURRENT FORECAST HAS THIS HANDLED WELL SO FEW IF ANY CHANGES ARE PLANNED. && .TBW WATCHES/WARNINGS/ADVISORIES... FL...NONE. GULF WATERS...NONE. && DISCUSSION/MARINE...JILLSON AVIATION...CARLISLE
Hazardous weather outlook, Feb 15, 8:22 AM EST, 4 hours 9 minutes before
HAZARDOUS WEATHER OUTLOOK...CORRECTED NATIONAL WEATHER SERVICE TAMPA BAY RUSKIN FL 822 AM EST TUE FEB 15 2011 FLZ039-042-043-048>052-055>057-060>062-065-160145- LEVY-CITRUS-SUMTER-HERNANDO-PASCO-PINELLAS-HILLSBOROUGH-POLK- MANATEE-HARDEE-HIGHLANDS-SARASOTA-DE SOTO-CHARLOTTE-LEE- 822 AM EST TUE FEB 15 2011 THIS HAZARDOUS WEATHER OUTLOOK IS FOR WEST CENTRAL AND SOUTHWEST FLORIDA. .DAY ONE...TODAY AND TONIGHT. ...FIRE WEATHER IMPACT... WITH SOME DRY AIR STILL LINGERING IN PARTS OF THE REGION...ONE TO THREE HOURS OF LOW RELATIVE HUMIDITY BELOW 35 PERCENT WILL BE POSSIBLE FOR AREAS SOUTH OF THE HILLSBOROUGH AND POLK COUNTY LINE. ...DENSE FOG IMPACT... PATCHY FOG WILL DEVELOP AGAIN TONIGHT...AND THE NORMALLY FOG PRONE LOCATIONS COULD SEE LOCALLY DENSE FOG WITH VISIBILITIES BELOW A HALF MILE AT TIMES. .DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY. NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED TODAY. BARRON/JILLSON
The office that day
Everything else NWS Tampa Bay, FL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Feb 15, 5:50 AM EST | Dense Fog Advisory | TBW | Pinellas, Polk, Sumter | 2 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.