Alert archive / Florida / Freeze Warnings in 2018

Freeze Warning 5, NWS Tampa Bay, FL

January 13, 2018Levy County, Florida

NWS Tampa Bay, FL issued this freeze warning at Jan 13, 2018, 2:15 PM EST for Levy County, Florida. It took effect at Jan 14, 2018, 4:00 AM EST. It was in force for 5 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 13, 2018, 2:15 PM EST (19:15 UTC)
In effect from
Jan 14, 2018, 4:00 AM EST
Expired
Jan 14, 2018, 9:00 AM EST
In force
5 hr
Issued by
NWS Tampa Bay, FL

County Levy County, FL

The radar

The Jacksonville radar (KJAX), 170 km from the middle of the area, began a volume at 19:14 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

Tallahassee Rgnl, FL (KTLH), launched 12:00Z, 7.3 hours before the alert went out and 192 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, Tallahassee Rgnl, FL at 12:00Z on 2018-01-13Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCLEL10008507005003002001001 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, Tallahassee Rgnl, FL at 12:00Z on 2018-01-13The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -73 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
651 m above ground
0-6 km bulk shear
66 kt
0-1 km storm-relative helicity
-73 m²/s²
0-3 km storm-relative helicity
31 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 freeze 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 freeze warning went out at Jan 13, 2:08 PM EST, 7 minutes earlier.

Area forecast discussion, Jan 13, 2:08 PM EST, 7 minutes before
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Hazardous weather outlook, Jan 13, 4:55 AM EST, 9 hours 20 minutes before
Hazardous Weather Outlook
National Weather Service Tampa Bay Ruskin FL
455 AM EST Sat Jan 13 2018

FLZ043-050-052-056-057-061-139-142-148-149-151-155-160-162-165-
239-242-248-249-251-255-260-262-265-GMZ830-836-850-853-856-870-
873-876-132200-
Sumter-Pinellas-Polk-Hardee-Highlands-DeSoto-Coastal Levy-
Coastal Citrus-Coastal Hernando-Coastal Pasco-
Coastal Hillsborough-Coastal Manatee-Coastal Sarasota-
Coastal Charlotte-Coastal Lee-Inland Levy-Inland Citrus-
Inland Hernando-Inland Pasco-Inland Hillsborough-Inland Manatee-
Inland Sarasota-Inland Charlotte-Inland Lee-Tampa Bay waters-
Charlotte Harbor and Pine Island Sound-
Coastal waters from Tarpon Springs to Suwannee River FL out 20 NM-
Coastal waters from Englewood to Tarpon Springs FL out 20 NM-
Coastal waters from Bonita Beach to Englewood FL out 20 NM-
Waters from Tarpon Springs to Suwannee River FL out 20 to 60 NM-
Waters from Englewood to Tarpon Springs FL out 20 to 60 NM-
Waters from Bonita Beach to Englewood FL out 20 to 60 NM-
455 AM EST Sat Jan 13 2018

This Hazardous Weather Outlook is for West Central And Southwest
Florida.

.DAY ONE...Today and Tonight.

...EXCESSIVE COLD IMPACT...
A freeze watch is in effect tonight for inland Levy county where
low temperatures are expected to be around 30 degrees. Elsewhere,
overnight temperatures will drop into the upper 30s to lower 40s.
Make sure to dress in layers to protect yourself from the cold.

...RIP CURRENT IMPACT...
High surf will produce rip currents along area beaches today.

...MARINE IMPACTS...
A small craft advisory for hazardous seas is in effect for the
outer waters until 10 PM this evening. A high surf advisory is in
effect until 7 PM this evening along the coast.

.DAYS TWO THROUGH SEVEN...Sunday through Friday.

...EXCESSIVE COLD IMPACT...
A cold front is expected to push across the area mid week with
much colder temperatures in the wake of the front. Temperatures
will likely drop below freezing Wednesday night over the nature
coast...and possibly across interior areas of west central
Florida.

...MARINE IMPACTS...
Wind speeds may approach advisory levels across the coastal
waters of west central and southwest Florida in the wake of a
cold front on Wednesday.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be needed today.

Oglesby

The office that day

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

IssuedProductOfficeCountiesLasted
Jan 13, 3:44 AM ESTFreeze WatchTBWLevy11 hr
Jan 13, 3:49 AM ESTHigh Surf AdvisoryTBWCharlotte, Hillsborough, Lee, Manatee, Pinellas, Sarasota15 hr
Jan 13, 3:57 AM ESTSmall Craft Advisory for Hazardous SeasTBW18 hr

Nearby

Freeze Warnings in Florida, 2018Every freeze warning in 2018

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.