Alert archive / Florida / Freeze Warnings in 2008

Freeze Warning 13, NWS Jacksonville, FL

November 18, 2008Flagler County, Nassau County, Florida; Camden County, Glynn County, Georgia

NWS Jacksonville, FL issued this freeze warning at Nov 18, 2008, 4:21 AM EST for Flagler County, Nassau County, Florida; Camden County, Glynn County, Georgia. It took effect at Nov 19, 2008, 2:00 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: Nov 18, 2008, 4:21 AM EST (09:21 UTC)
In effect from: Nov 19, 2008, 2:00 AM EST
Expired: Nov 19, 2008, 9:00 AM EST
In force: 7 hr
Issued by: NWS Jacksonville, FL

Counties Flagler County, FL, Nassau County, FL, Camden County, GA, Glynn County, GA

The nearest sounding before it

Cape Canaveral, FL (KXMR), launched 00:00Z, 9.4 hours before the alert went out and 253 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: 1761 m above ground
0-6 km bulk shear: 32 kt
0-1 km storm-relative helicity: -21 m²/s²
0-3 km storm-relative helicity: 21 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 Jacksonville, FL wrote its last area forecast discussion before this freeze warning went out at Nov 18, 4:00 AM EST, 21 minutes earlier.

Area forecast discussion, Nov 18, 4:00 AM EST, 21 minutes before

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Hazardous weather outlook, Nov 17, 8:47 PM EST, 7 hours 34 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Nov 18, 4:21 AM EST	Freeze Watch	JAX	Baker, Bradford, Flagler, Gilchrist, Nassau, Suwannee and 1 more	33 hr
Nov 18, 4:21 AM EST	Hard Freeze Warning	JAX	Baker, Bradford, Gilchrist, Suwannee, Union	29 hr
Nov 18, 4:21 AM EST	Lake Wind Advisory	JAX	Baker, Bradford, Flagler, Gilchrist, Nassau, Suwannee and 1 more	12 hr
Nov 18, 1:36 PM EST	Red Flag Warning	JAX	Baker, Bradford, Gilchrist, Nassau, Suwannee, Union	27 hr
Nov 18, 2:46 PM EST	Wind Chill Advisory	JAX	Flagler, Nassau	18 hr

Nearby

Freeze Warnings in Florida, 2008 Freeze Warnings in Georgia, 2008 Every freeze warning in 2008

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.