Alert archive / Tennessee / Frost Advisories in 2020
Frost Advisory 3, NWS Memphis, TN
NWS Memphis, TN issued this frost advisory at Apr 15, 2020, 3:17 PM CDT for 9 counties in Mississippi; 20 counties in Tennessee; Clay County, Arkansas. It took effect at Apr 16, 2020, 2:00 AM CDT. It was in force for 7 hr.
The area
The counties it named.
The facts
- Issued
- Apr 15, 2020, 3:17 PM CDT (20:17 UTC)
- In effect from
- Apr 16, 2020, 2:00 AM CDT
- Expired
- Apr 16, 2020, 8:50 AM CDT
- In force
- 7 hr
- Issued by
- NWS Memphis, TN
All 30 counties
Clay County, AR, Alcorn County, MS, Benton County, MS, Lafayette County, MS, Marshall County, MS, Pontotoc County, MS, Prentiss County, MS, Tippah County, MS, Tishomingo County, MS, Union County, MS, Benton County, TN, Carroll County, TN, Chester County, TN, Crockett County, TN, Decatur County, TN, Dyer County, TN, Fayette County, TN, Gibson County, TN, Hardeman County, TN, Hardin County, TN, Haywood County, TN, Henderson County, TN, Henry County, TN, Lake County, TN, Lauderdale County, TN, Madison County, TN, McNairy County, TN, Obion County, TN, Tipton County, TN, Weakley County, TN
The radar
The Memphis radar (KNQA), 85 km from the middle of the area, began a volume at 20:22 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, 8.3 hours before the alert went out and 225 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.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 2137 m above ground
- 0-6 km bulk shear
- 110 kt
- 0-1 km storm-relative helicity
- -176 m²/s²
- 0-3 km storm-relative helicity
- -91 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The office that day
Everything else NWS Memphis, TN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 15, 10:54 AM CDT | River Flood Advisory | MEG | DeSoto | 13 days |
| Apr 15, 3:27 AM CDT | Freezing Fog Advisory | MEG | Benton, Carroll, Chester, Decatur, Hardin, Henderson and 2 more | 5 hr |
| Apr 15, 10:54 AM CDT | River Flood Advisory | MEG | Lake | 6 days |
Nearby
Frost Advisories in Tennessee, 2020Frost Advisories in Mississippi, 2020Frost Advisories in Arkansas, 2020Every frost advisory in 2020
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.