Alert archive / Florida / Red Flag Warnings in 2011
Red Flag Warning 9, NWS Tampa Bay, FL
NWS Tampa Bay, FL issued this red flag warning at Feb 13, 2011, 1:15 PM EST for 6 counties in Florida. It took effect at Feb 14, 2011, 11:00 AM EST. 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
- Feb 13, 2011, 1:15 PM EST (18:15 UTC)
- In effect from
- Feb 14, 2011, 11:00 AM EST
- Expired
- Feb 14, 2011, 7:00 PM EST
- In force
- 8 hr
- Issued by
- NWS Tampa Bay, FL
Counties DeSoto County, FL, Hardee County, FL, Highlands County, FL, Pinellas County, FL, Polk County, FL, Sumter County, FL
The radar
The Tampa radar (KTBW), 49 km from the middle of the area, began a volume at 18:18 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
Cape Canaveral, FL (KXMR), launched 12:00Z, 6.3 hours before the alert went out and 159 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
- 1921 m above ground
- 0-6 km bulk shear
- 41 kt
- 0-1 km storm-relative helicity
- -31 m²/s²
- 0-3 km storm-relative helicity
- 43 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
669 WWUS82 KTBW 131815 RFWTBW URGENT - FIRE WEATHER MESSAGE NATIONAL WEATHER SERVICE TAMPA BAY AREA - RUSKIN FL 115 PM EST SUN FEB 13 2011 ...RED FLAG WARNING IN EFFECT FOR THIS AFTERNOON FOR ALL COUNTIES... ...RED FLAG WARNING IN EFFECT FOR MONDAY AFTERNOON FOR ALL COUNTIES... .STRONG HIGH PRESSURE OVER NORTHERN FLORIDA WILL CONTINUE TO KEEP A COOL AND VERY DRY AIRMASS IN PLACE THROUGH LATE MONDAY. FLZ039-042-043-048-049-051-052-055>057-060>062-065-141215- /O.UPG.KTBW.FW.A.0008.110214T1600Z-110215T0000Z/ /O.NEW.KTBW.FW.W.0009.110214T1600Z-110215T0000Z/ /O.CON.KTBW.FW.W.0008.000000T0000Z-110214T0000Z/ LEVY-CITRUS-SUMTER-HERNANDO-PASCO-HILLSBOROUGH-POLK-MANATEE- HARDEE-HIGHLANDS-SARASOTA-DE SOTO-CHARLOTTE-LEE- 115 PM EST SUN FEB 13 2011 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 7 PM EST THIS EVENING... ...RED FLAG WARNING IN EFFECT FROM 11 AM TO 7 PM EST MONDAY... THE NATIONAL WEATHER SERVICE IN TAMPA BAY AREA - RUSKIN FL HAS ISSUED A RED FLAG WARNING...WHICH IS IN EFFECT FROM 11 AM TO 7 PM EST MONDAY. THE FIRE WEATHER WATCH IS NO LONGER IN EFFECT. A RED FLAG WARNING REMAINS IN EFFECT UNTIL 7 PM EST THIS EVENING. RELATIVE HUMIDITY WILL REMAIN BELOW 35 PERCENT THROUGH 7 PM THIS EVENING WITH SUNNY SKIES AND VERY DRY AIR IN PLACE. VALUES WILL FALL AS LOW AS 15 PERCENT ACROSS PORTIONS OF THE INTERIOR THIS AFTERNOON. STRONG HIGH PRESSURE OVER NORTHERN FLORIDA WILL KEEP A COOL AND VERY DRY AIRMASS IN PLACE ON MONDAY. RELATIVE HUMIDITY WILL FALL BELOW 35 PERCENT BEFORE NOON AND REMAIN AT CRITICALLY LOW LEVELS FOR MORE THAN 4 HOURS. RH WILL FALL TO AS LOW AS 20 PERCENT ACROSS INTERIOR AREAS. WINDS TURNING ONSHORE WITH A SEA BREEZE LATE IN THE AFTERNOON NEAR THE COAST WILL BRING INCREASING MOISTURE AFTER 2 PM...BUT INTERIOR AREAS WILL REMAIN WITH VERY LOW HUMIDITY. 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. && $$ FLZ050-141215- /O.NEW.KTBW.FW.W.0009.110214T1600Z-110215T0000Z/ /O.CON.KTBW.FW.W.0008.000000T0000Z-110214T0000Z/ PINELLAS- 115 PM EST SUN FEB 13 2011 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 7 PM EST THIS EVENING... ...RED FLAG WARNING IN EFFECT FROM 11 AM TO 7 PM EST MONDAY... THE NATIONAL WEATHER SERVICE IN TAMPA BAY AREA - RUSKIN FL HAS ISSUED A RED FLAG WARNING...WHICH IS IN EFFECT FROM 11 AM TO 7 PM EST MONDAY. A RED FLAG WARNING REMAINS IN EFFECT UNTIL 7 PM EST THIS EVENING. RELATIVE HUMIDITY WILL REMAIN BELOW 35 PERCENT THROUGH 7 PM THIS EVENING WITH SUNNY SKIES AND VERY DRY AIR IN PLACE. VALUES WILL FALL AS LOW AS 20 PERCENT THIS AFTERNOON. STRONG HIGH PRESSURE OVER NORTHERN FLORIDA WILL KEEP A COOL AND VERY DRY AIRMASS IN PLACE ACROSS THE AREA ON MONDAY. RELATIVE HUMIDITY WILL FALL BELOW 35 PERCENT BEFORE NOON AND REMAIN AT CRITICALLY LOW LEVELS FOR AROUND 4 HOURS. WINDS TURNING ONSHORE WITH A SEA BREEZE LATE IN THE AFTERNOON NEAR THE COAST WILL BRING INCREASING MOISTURE AFTER 2 PM. PORTIONS OF CENTRAL AND NORTHEAST PINELLAS COUNTY WILL REMAIN WITH CRITICALLY LOW RELATIVE HUMIDITY THROUGH THE EVENING. PRECAUTIONARY/PREPAREDNESS ACTIONS... A RED FLAG WARNING IS ISSUED WHEN VERY FAVORABLE CONDITIONS FOR THE SPREAD OF WILDFIRE ARE OCCURRING NOW...OR WILL OCCUR WITHIN 24 HOURS. && $$
2 follow-up statements
701 WWUS82 KTBW 140205 RFWTBW URGENT - FIRE WEATHER MESSAGE NATIONAL WEATHER SERVICE TAMPA BAY AREA - RUSKIN FL 905 PM EST SUN FEB 13 2011 ...RED FLAG WARNING IN EFFECT ON MONDAY AFTERNOON FOR ALL COUNTIES... .STRONG HIGH PRESSURE OVER NORTHERN FLORIDA WILL KEEP A COOL AND VERY DRY AIRMASS IN PLACE THROUGH LATE MONDAY. FLZ039-042-043-048>052-055>057-060>062-065-150000- /O.CON.KTBW.FW.W.0009.110214T1600Z-110215T0000Z/ LEVY-CITRUS-SUMTER-HERNANDO-PASCO-PINELLAS-HILLSBOROUGH-POLK- MANATEE-HARDEE-HIGHLANDS-SARASOTA-DE SOTO-CHARLOTTE-LEE- 905 PM EST SUN FEB 13 2011 ...RED FLAG WARNING REMAINS IN EFFECT FROM 11 AM TO 7 PM EST MONDAY... A RED FLAG WARNING REMAINS IN EFFECT FROM 11 AM TO 7 PM EST MONDAY. STRONG HIGH PRESSURE OVER NORTHERN FLORIDA WILL KEEP A COOL AND VERY DRY AIRMASS IN PLACE ON MONDAY. RELATIVE HUMIDITY WILL FALL BELOW 35 PERCENT BEFORE NOON AND REMAIN AT CRITICALLY LOW LEVELS FOR MORE THAN 4 HOURS. HUMIDITIES WILL FALL TO AS LOW AS 20 PERCENT ACROSS INTERIOR AREAS. WINDS TURNING ONSHORE WITH A SEA BREEZE LATE IN THE AFTERNOON NEAR THE COAST WILL BRING INCREASING MOISTURE AFTER 2 PM...BUT INTERIOR AREAS WILL CONTINUE TO SEE VERY LOW HUMIDITY VALUES. 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. && $$
718 WWUS82 KTBW 141805 RFWTBW URGENT - FIRE WEATHER MESSAGE NATIONAL WEATHER SERVICE TAMPA BAY AREA - RUSKIN FL 105 PM EST MON FEB 14 2011 ...RED FLAG WARNING IN EFFECT UNTIL 7 PM EST THIS EVENING... .STRONG HIGH PRESSURE OVER NORTHERN FLORIDA WILL KEEP A COOL AND VERY DRY AIRMASS IN PLACE THROUGH THIS EVENING. FLZ039-042-043-048>052-055>057-060>062-065-150000- /O.CON.KTBW.FW.W.0009.000000T0000Z-110215T0000Z/ LEVY-CITRUS-SUMTER-HERNANDO-PASCO-PINELLAS-HILLSBOROUGH-POLK- MANATEE-HARDEE-HIGHLANDS-SARASOTA-DE SOTO-CHARLOTTE-LEE- 105 PM EST MON FEB 14 2011 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 7 PM EST THIS EVENING... A RED FLAG WARNING REMAINS IN EFFECT UNTIL 7 PM EST THIS EVENING. RELATIVE HUMIDITY WILL REMAIN VERY LOW ACROSS INTERIOR AREAS THROUGH THIS EVENING...WITH VALUES FALLING TO AS LOW AS 20 PERCENT. WINDS HAVE TURNED ONSHORE NEAR THE COAST WITH A SEABREEZE AND THIS WILL KEEP HUMIDITY LEVELS HIGHER CLOSER TO THE COAST. PRECAUTIONARY/PREPAREDNESS ACTIONS... A RED FLAG WARNING IS ISSUED WHEN VERY FAVORABLE CONDITIONS FOR THE SPREAD OF WILDFIRE ARE OCCURRING NOW...OR WILL OCCUR WITHIN 24 HOURS. && $$
The office that day
Everything else NWS Tampa Bay, FL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Feb 13, 3:15 AM EST | Freeze Watch | TBW | Sumter | 12 hr |
| Feb 13, 3:40 PM EST | Freeze Warning | TBW | Sumter | 17 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.