Alert archive / Tennessee / Wind Chill Advisories in 2018

Wind Chill Advisory 1, NWS Memphis, TN

January 3, 201815 counties in Tennessee; 4 counties in Arkansas

NWS Memphis, TN issued this wind chill advisory at Jan 3, 2018, 3:22 PM CST for 15 counties in Tennessee; 4 counties in Arkansas. It took effect at Jan 4, 2018, 12:00 AM CST. It was in force for 10 hr.

The area

The counties it named.

The facts

Issued: Jan 3, 2018, 3:22 PM CST (21:22 UTC)
In effect from: Jan 4, 2018, 12:00 AM CST
Expired: Jan 4, 2018, 10:00 AM CST
In force: 10 hr
Issued by: NWS Memphis, TN

Counties Clay County, AR, Greene County, AR, Mississippi County, AR, Randolph County, AR, Benton County, TN, Carroll County, TN, Chester County, TN, Crockett County, TN, Decatur County, TN, Dyer County, TN, Gibson County, TN, Haywood County, TN, Henderson County, TN, Henry County, TN, Lake County, TN, Lauderdale County, TN, Madison County, TN, Obion County, TN, Weakley County, TN

The radar

The Memphis radar (KNQA), 93 km from the middle of the area, began a volume at 21:23 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

Nashville Metro, TN (KBNA), launched 12:00Z, 9.4 hours before the alert went out and 233 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: 2209 m above ground
0-6 km bulk shear: 32 kt
0-1 km storm-relative helicity: 27 m²/s²
0-3 km storm-relative helicity: 57 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 Memphis, TN wrote its last area forecast discussion before this wind chill advisory went out at Jan 2, 5:32 PM CST, 21 hours 50 minutes earlier.

Area forecast discussion, Jan 2, 5:32 PM CST, 21 hours 50 minutes before

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Nearby

Wind Chill Advisories in Tennessee, 2018 Wind Chill Advisories in Arkansas, 2018 Every 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; radar from the NEXRAD Level II archive.