Alert archive / Florida / Wind Chill Advisories in 2010

Wind Chill Advisory 2, NWS Tampa Bay, FL

January 2, 20106 counties in Florida

NWS Tampa Bay, FL issued this wind chill advisory at Jan 2, 2010, 2:30 PM EST for 6 counties in Florida. It took effect at Jan 2, 2010, 11:00 PM EST. It was in force for 10 hr.

The area

The counties it named.

The facts

Issued
Jan 2, 2010, 2:30 PM EST (19:30 UTC)
In effect from
Jan 2, 2010, 11:00 PM EST
Expired
Jan 3, 2010, 9:00 AM EST
In force
10 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 19:31 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, 7.5 hours before the alert went out and 49 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, Tampa Bay, FL at 12:00Z on 2010-01-02Temperature 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, Tampa Bay, FL at 12:00Z on 2010-01-02The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -206 square meters per square second.1939587897117Sfc1 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
2381 m above ground
0-6 km bulk shear
52 kt
0-1 km storm-relative helicity
-206 m²/s²
0-3 km storm-relative helicity
-6 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 wind chill advisory 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 wind chill advisory went out at Jan 2, 2:26 PM EST, 4 minutes earlier.

Area forecast discussion, Jan 2, 2:26 PM EST, 4 minutes before
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Hazardous weather outlook, Jan 2, 4:02 AM EST, 10 hours 28 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE TAMPA BAY RUSKIN FL
402 AM EST SAT JAN 2 2010

FLZ039-042-043-048>052-055>057-060>062-065-031000-
LEVY-CITRUS-SUMTER-HERNANDO-PASCO-PINELLAS-HILLSBOROUGH-POLK-
MANATEE-HARDEE-HIGHLANDS-SARASOTA-DE SOTO-CHARLOTTE-LEE-
402 AM EST SAT JAN 2 2010

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

.DAY ONE...TODAY AND TONIGHT.

...EXCESSIVE COLD IMPACT...
VERY COLD TEMPERATURES ARE EXPECTED OVER THE REGION FOR THE NEXT
SEVERAL DAYS. MOST LOCATIONS WILL SEE FREEZING TEMPERATURES
TONIGHT INTO SUNDAY MORNING...WITH THE NATURE COAST SEEING LOWS
DROPPING INTO THE LOWER 20S IN SOME LOCATIONS. THESE COLD
TEMPERATURES...COMBINED WITH WINDS STILL AROUND 10 MPH WILL ALSO
CREATE VERY LOW WIND CHILLS TONIGHT.

...WIND AND SEA IMPACT...
STRONG NORTH WINDS WILL CONTINUE OFFSHORE THIS MORNING. AS HIGH
PRESSURE BUILDS DOWN FROM THE NORTH...WIND SPEEDS WILL DIMINISH
SLIGHTLY...BUT REMAIN BREEZY FOR THE NEXT SEVERAL DAYS.

...FIRE WEATHER IMPACT...
VERY DRY CONDITIONS EXPECTED THIS AFTERNOON. A RED FLAG WARNING
HAS BEEN ISSUED FOR ALL BUT PINELLAS COUNTY THIS AFTERNOON DUE TO
CRITICAL RELATIVE HUMIDITY VALUES BEING ANTICIPATED.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY.

...EXCESSIVE COLD IMPACT...
COLD TEMPERATURES WILL CONTINUE THROUGH MID WEEK. MUCH OF THE AREA
WILL SEE NEAR OR BELOW FREEZING TEMPERATURES MONDAY THROUGH
WEDNESDAY MORNINGS.

...FIRE WEATHER IMPACT...
DRY CONDITIONS CONTINUE AT LEAST THROUGH WEDNESDAY AFTERNOON WITH
RELATIVE HUMIDITIES EXPECTED TO BE NEAR OR BELOW CRITICAL VALUES.

.SPOTTER INFORMATION STATEMENT...
SPOTTER ACTIVATION WILL NOT BE NEEDED TODAY.

MCNATT

The office that day

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

IssuedProductOfficeCountiesLasted
Jan 2, 3:45 AM ESTFreeze WarningTBWDeSoto, Hardee, Highlands, Polk29 hr
Jan 2, 3:45 AM ESTHard Freeze WarningTBWSumter29 hr
Jan 2, 3:49 AM ESTWind Chill WatchTBWDeSoto, Hardee, Highlands, Pinellas, Polk, Sumter11 hr
Jan 2, 1:55 PM ESTRed Flag WarningTBWDeSoto, Hardee, Highlands, Polk, Sumter27 hr
Jan 2, 2:28 PM ESTFreeze WatchTBWDeSoto, Hardee, Highlands, Polk25 hr
Jan 2, 2:28 PM ESTHard Freeze WatchTBWSumter25 hr
Jan 2, 4:15 PM ESTFire Weather WatchTBWDeSoto, Hardee, Highlands, Polk, Sumter25 hr

Nearby

Wind Chill Advisories in Florida, 2010Every wind chill advisory 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.