Alert archive / Georgia / Wind Chill Advisories in 2018

Wind Chill Advisory 4, NWS Jacksonville, FL

January 17, 20188 counties in Florida; 12 counties in Georgia

NWS Jacksonville, FL issued this wind chill advisory at Jan 17, 2018, 8:35 AM EST for 8 counties in Florida; 12 counties in Georgia. It took effect at Jan 17, 2018, 9:00 PM EST. It was in force for 12 hr.

The area

The counties it named.

The facts

Issued
Jan 17, 2018, 8:35 AM EST (13:35 UTC)
In effect from
Jan 17, 2018, 9:00 PM EST
Expired
Jan 18, 2018, 9:00 AM EST
In force
12 hr
Issued by
NWS Jacksonville, FL

Counties Baker County, FL, Bradford County, FL, Duval County, FL, Flagler County, FL, Gilchrist County, FL, Nassau County, FL, Suwannee County, FL, Union County, FL, Appling County, GA, Atkinson County, GA, Bacon County, GA, Brantley County, GA, Camden County, GA, Clinch County, GA, Coffee County, GA, Echols County, GA, Glynn County, GA, Jeff Davis County, GA, Pierce County, GA, Wayne County, GA

The nearest sounding before it

Jacksonville, FL (KJAX), launched 12:00Z, 1.6 hours before the alert went out and 65 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, Jacksonville, FL at 12:00Z on 2018-01-17Temperature 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, Jacksonville, FL at 12:00Z on 2018-01-17The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 44 square meters per square second.1939587897117136Sfc1 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
1595 m above ground
0-6 km bulk shear
59 kt
0-1 km storm-relative helicity
44 m²/s²
0-3 km storm-relative helicity
160 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The office that day

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

IssuedProductOfficeCountiesLasted
Jan 16, 8:27 PM ESTSmall Craft AdvisoryJAX42 hr
Jan 17, 1:55 AM ESTMarine Dense Fog AdvisoryJAX7 hr
Jan 17, 8:41 AM ESTHard Freeze WarningJAXBaker, Bradford, Duval, Flagler, Gilchrist, Nassau and 2 more24 hr

Nearby

Wind Chill Advisories in Georgia, 2018Wind Chill Advisories in Florida, 2018Every wind chill advisory 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.