Alert archive / Florida / Red Flag Warnings in 2010

Red Flag Warning 10, NWS Tampa Bay, FL

January 12, 20105 counties in Florida

NWS Tampa Bay, FL issued this red flag warning at Jan 12, 2010, 4:15 AM EST for 5 counties in Florida. It took effect at Jan 12, 2010, 11:00 AM EST. It was in force for 7 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
Jan 12, 2010, 4:15 AM EST (09:15 UTC)
In effect from
Jan 12, 2010, 11:00 AM EST
Expired
Jan 12, 2010, 6:00 PM EST
In force
7 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 09:14 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 00:00Z, 9.3 hours before the alert went out and 147 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, Cape Canaveral, FL at 00:00Z on 2010-01-12Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Cape Canaveral, FL at 00:00Z on 2010-01-12The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 29 square meters per square second.1939587897Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1698 m above ground
0-6 km bulk shear
39 kt
0-1 km storm-relative helicity
29 m²/s²
0-3 km storm-relative helicity
50 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

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 Jan 11, 4:51 PM EST, 11 hours 24 minutes earlier.

Area forecast discussion, Jan 11, 4:51 PM EST, 11 hours 24 minutes before
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Hazardous weather outlook, Jan 11, 5:03 AM EST, 23 hours 12 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE TAMPA BAY RUSKIN FL
503 AM EST MON JAN 11 2010

FLZ039-042-043-048>052-055>057-060>062-065-112300-
LEVY-CITRUS-SUMTER-HERNANDO-PASCO-PINELLAS-HILLSBOROUGH-POLK-
MANATEE-HARDEE-HIGHLANDS-SARASOTA-DE SOTO-CHARLOTTE-LEE-
503 AM EST MON JAN 11 2010

THIS HAZARDOUS WEATHER OUTLOOK IS FOR WEST CENTRAL AND SOUTHWEST
FLORIDA.

.DAY ONE...TODAY AND TONIGHT.

...EXCESSIVE COLD IMPACT...
TEMPERATURES BELOW FREEZING ACROSS THE AREA EARLY THIS MORNING WILL
SLOWLY BEGIN TO RISE AFTER SUNRISE...ALLOWING THE HARD FREEZE AND
FREEZE WARNINGS ALONG WITH THE WIND CHILL ADVISORY TO EXPIRE
AROUND 900 AM.

THE COLD AIRMASS WILL REMAIN IN PLACE TODAY WITH FREEZING TEMPERATURES
AGAIN EXPECTED TONIGHT...WITH A HARD FREEZE OVER THE NORTH AND A FREEZE
WARNING OVER THE CENTRAL AND SOUTH...AWAY FROM THE IMMEDIATE COAST.

...WIND AND SEA IMPACT...
NORTH WINDS AROUND 20 KNOTS EARLY THIS MORNING WILL BE DIMINISHING
WITH THE SMALL CRAFT ADVISORY EXPECTED TO EXPIRE MID-MORNING.

...FIRE WEATHER IMPACT...
A VERY DRY AIRMASS TODAY WILL RESULT IN HUMIDITY WELL BELOW 35
PERCENT FOR EXTENDED DURATIONS TODAY. A RED FLAG WARNING WILL BE
IN EFFECT FOR ALL COUNTIES EXCEPT PINELLAS.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY.

...EXCESSIVE COLD IMPACT...
TEMPERATURES WILL BEGIN TO SLOWLY WARM...HOWEVER TUESDAY NIGHT AND
EARLY WEDNESDAY MORNING WILL SEE BELOW FREEZING READING IN THE
NORTH...WHERE A FREEZE WATCH HAS BEEN ISSUED.

...FIRE WEATHER IMPACT...
A DRY AIRMASS WILL CONTINUE INTO MIDWEEK. A FIRE WEATHER WATCH
WILL BE IN EFFECT ALL COUNTIES EXCEPT PINELLAS TUESDAY.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL NOT BE NEEDED TODAY.

RKR

The office that day

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

IssuedProductOfficeCountiesLasted
Jan 12, 4:38 AM ESTFreeze WarningTBWSumter28 hr
Jan 12, 1:47 PM ESTFire Weather WatchTBW16 hr
Jan 12, 3:33 PM ESTFrost AdvisoryTBWDeSoto, Hardee, Highlands, Polk17 hr
Jan 12, 3:33 PM ESTHard Freeze WarningTBW17 hr

Nearby

Red Flag Warnings in Florida, 2010Every red flag warning in 2010

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.