Alert archive / Mississippi / Winter Weather Advisories in 2021
Winter Weather Advisory 8, NWS Memphis, TN
NWS Memphis, TN issued this winter weather advisory at Feb 18, 2021, 2:54 PM CST for 14 counties in Mississippi; Decatur County, Hardin County, Tennessee. It took effect at Feb 18, 2021, 3:00 PM CST. It was in force for 3 hr.
The area
The counties it named.
The facts
- Issued
- Feb 18, 2021, 2:54 PM CST (20:54 UTC)
- In effect from
- Feb 18, 2021, 3:00 PM CST
- Expired
- Feb 18, 2021, 5:53 PM CST
- In force
- 3 hr
- Issued by
- NWS Memphis, TN
Counties Alcorn County, MS, Calhoun County, MS, Chickasaw County, MS, Itawamba County, MS, Lafayette County, MS, Lee County, MS, Monroe County, MS, Pontotoc County, MS, Prentiss County, MS, Tallahatchie County, MS, Tippah County, MS, Tishomingo County, MS, Union County, MS, Yalobusha County, MS, Decatur County, TN, Hardin County, TN
The radar
The Columbus AFB radar (KGWX), 78 km from the middle of the area, began a volume at 20:53 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
Jackson, MS (KJAN), launched 12:00Z, 8.9 hours before the alert went out and 262 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
- 4 J/kg
- Mixed-layer CIN
- 0 J/kg
- Mixed-layer LCL
- 421 m above ground
- 0-6 km bulk shear
- 92 kt
- 0-1 km storm-relative helicity
- 116 m²/s²
- 0-3 km storm-relative helicity
- -80 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
What forecasters said that day
The local office's own words before this winter weather 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 winter weather advisory went out at Feb 17, 5:31 PM CST, 21 hours 23 minutes earlier.
Area forecast discussion, Feb 17, 5:31 PM CST, 21 hours 23 minutes before
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</html>The office that day
Everything else NWS Memphis, TN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Feb 18, 9:07 AM CST | Winter Weather Advisory | MEG | Alcorn, Benton, Calhoun, Chickasaw, Coahoma, DeSoto and 16 more | 6 hr |
| Feb 18, 2:54 PM CST | Wind Chill Advisory | MEG | DeSoto, Tunica | 18 hr |
Nearby
Winter Weather Advisories in Mississippi, 2021Winter Weather Advisories in Tennessee, 2021Every winter weather advisory in 2021
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.