Alert archive / Florida / Freeze Warnings in 2018

Freeze Warning 9, NWS Tampa Bay, FL

March 14, 2018Levy County, Florida

NWS Tampa Bay, FL issued this freeze warning at Mar 14, 2018, 2:54 PM EDT for Levy County, Florida. It took effect at Mar 15, 2018, 4:00 AM EDT. 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: Mar 14, 2018, 2:54 PM EDT (18:54 UTC)
In effect from: Mar 15, 2018, 4:00 AM EDT
Expired: Mar 15, 2018, 9:00 AM EDT
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 18:51 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, 6.9 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 2305 m above ground
0-6 km bulk shear: 62 kt
0-1 km storm-relative helicity: -128 m²/s²
0-3 km storm-relative helicity: -46 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 Mar 14, 1:43 PM EDT, 1 hour 11 minutes earlier.

Area forecast discussion, Mar 14, 1:43 PM EDT, 1 hour 11 minutes before

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Hazardous weather outlook, Mar 14, 5:07 AM EDT, 9 hours 47 minutes before

Hazardous Weather Outlook
National Weather Service Tampa Bay Ruskin FL
507 AM EDT Wed Mar 14 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-
873-876-142200-
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-
507 AM EDT Wed Mar 14 2018

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

.DAY ONE...Today and Tonight.

...EXCESSIVE COLD IMPACT...
Freezing temperatures are possible for up to 4 hours over Levy
county tonight. Make sure to dress in layers to protect yourself
from the cold.

Patchy frost is possible over the normally colder locations of
interior west-central Florida tonight, especially north of Tampa
Bay. Residents may wish to bring in cold sensitive plants.

...FIRE WEATHER IMPACT...
Critical fire weather conditions are expected over Polk county
today. A combination of low relative humidity and high ERC values
will contribute to extreme fire behavior.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.

...FIRE WEATHER IMPACT...
Low humidities will remain with us through at least Friday. Some
counties may experience red flag conditions with long durations of
critical humidities and high ERC values.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be needed today.

Jillson

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 14, 3:37 AM EDT	Red Flag Warning	TBW	Polk	17 hr
Mar 14, 3:37 AM EDT	Freeze Watch	TBW	Levy	11 hr

Nearby

Freeze Warnings in Florida, 2018 Every 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.