Alert archive / Tennessee / Frost Advisories in 2014

Frost Advisory 3, NWS Memphis, TN

October 4, 201412 counties in Tennessee

NWS Memphis, TN issued this frost advisory at Oct 4, 2014, 3:47 PM CDT for 12 counties in Tennessee. It took effect at Oct 4, 2014, 11:00 PM CDT. It was in force for 9 hr.

The area

The counties it named.

The facts

Issued: Oct 4, 2014, 3:47 PM CDT (20:47 UTC)
In effect from: Oct 4, 2014, 11:00 PM CDT
Expired: Oct 5, 2014, 8:00 AM CDT
In force: 9 hr
Issued by: NWS Memphis, TN

Counties Benton County, TN, Carroll County, TN, Chester County, TN, Decatur County, TN, Gibson County, TN, Hardin County, TN, Henderson County, TN, Henry County, TN, Madison County, TN, McNairy County, TN, Obion County, TN, Weakley County, TN

The radar

The Memphis radar (KNQA), 132 km from the middle of the area, began a volume at 20:51 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

Nashville Metro, TN (KBNA), launched 12:00Z, 8.8 hours before the alert went out and 177 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: 1290 m above ground
0-6 km bulk shear: 89 kt
0-1 km storm-relative helicity: -14 m²/s²
0-3 km storm-relative helicity: 37 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 frost 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 frost advisory went out at Oct 3, 4:43 PM CDT, 23 hours 4 minutes earlier.

Area forecast discussion, Oct 3, 4:43 PM CDT, 23 hours 4 minutes before

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Nearby

Frost Advisories in Tennessee, 2014 Every frost advisory in 2014

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.