Alert archive / Arkansas / Frost Advisories in 2015

Frost Advisory 7, NWS Memphis, TN

November 13, 201511 counties in Mississippi; Shelby County, Tennessee; 12 counties in Arkansas

NWS Memphis, TN issued this frost advisory at Nov 13, 2015, 3:20 AM CST for 11 counties in Mississippi; Shelby County, Tennessee; 12 counties in Arkansas. It took effect at Nov 14, 2015, 12:00 AM CST. It was in force for 9 hr.

The area

The counties it named.

The facts

Issued: Nov 13, 2015, 3:20 AM CST (09:20 UTC)
In effect from: Nov 14, 2015, 12:00 AM CST
Expired: Nov 14, 2015, 9:00 AM CST
In force: 9 hr
Issued by: NWS Memphis, TN

All 24 counties

Clay County, AR, Craighead County, AR, Crittenden County, AR, Cross County, AR, Greene County, AR, Lawrence County, AR, Lee County, AR, Mississippi County, AR, Phillips County, AR, Poinsett County, AR, Randolph County, AR, St. Francis County, AR, Calhoun County, MS, Chickasaw County, MS, Coahoma County, MS, DeSoto County, MS, Monroe County, MS, Panola County, MS, Quitman County, MS, Tallahatchie County, MS, Tate County, MS, Tunica County, MS, Yalobusha County, MS, Shelby County, TN

The radar

The Memphis radar (KNQA), 55 km from the middle of the area, began a volume at 09:25 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 00:00Z, 9.3 hours before the alert went out and 354 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: 1564 m above ground
0-6 km bulk shear: 88 kt
0-1 km storm-relative helicity: -39 m²/s²
0-3 km storm-relative helicity: 45 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 Nov 12, 5:23 PM CST, 9 hours 57 minutes earlier.

Area forecast discussion, Nov 12, 5:23 PM CST, 9 hours 57 minutes before

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Hazardous weather outlook, Nov 12, 3:20 PM CST, 12 hours before

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The office that day

Everything else NWS Memphis, TN issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Nov 13, 3:20 AM CST	Freeze Warning	MEG	Alcorn, Benton, Itawamba, Lafayette, Lee, Marshall and 5 more	30 hr

Nearby

Frost Advisories in Arkansas, 2015 Frost Advisories in Mississippi, 2015 Frost Advisories in Tennessee, 2015 Every frost advisory in 2015

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.