Alert archive / Tennessee / Areal Flood Advisories in 2021
Areal Flood Advisory 39, NWS Memphis, TN
NWS Memphis, TN issued this areal flood advisory at May 3, 2021, 7:54 AM CDT for Decatur County, Henderson County, Madison County, Tennessee. It was in force for 2 hr.
The area
The counties it named.
The facts
- Issued
- May 3, 2021, 7:54 AM CDT (12:54 UTC)
- Expired
- May 3, 2021, 10:00 AM CDT
- In force
- 2 hr
- Issued by
- NWS Memphis, TN
- Area
- Storm-based polygon
Counties Decatur County, TN, Henderson County, TN, Madison County, TN
The radar
The Memphis radar (KNQA), 133 km from the middle of the area, began a volume at 12:57 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
Little Rock, AR (KLZK), launched 12:00Z, 0.9 hours before the alert went out and 163 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
- 1119 J/kg
- Mixed-layer CIN
- -21 J/kg
- Mixed-layer LCL
- 546 m above ground
- 0-6 km bulk shear
- 34 kt
- 0-1 km storm-relative helicity
- 141 m²/s²
- 0-3 km storm-relative helicity
- 199 m²/s²
- Significant tornado parameter
- 0.5
- Supercell composite
- 3.2
What forecasters said that day
The local office's own words before this areal flood 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 areal flood advisory went out at May 3, 7:04 AM CDT, 50 minutes earlier.
Area forecast discussion, May 3, 7:04 AM CDT, 50 minutes before
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</html>Hazardous weather outlook, May 3, 4:25 AM CDT, 3 hours 29 minutes before
Hazardous Weather Outlook National Weather Service Memphis TN 425 AM CDT Mon May 3 2021 ARZ009-018-026>028-035-036-048-049-058-MOZ113-115-MSZ001>017- 020>024-TNZ001>004-019>022-048>055-088>092-041130- Alcorn-Benton MS-Benton TN-Calhoun-Carroll-Chester-Chickasaw-Clay- Coahoma-Craighead-Crittenden-Crockett-Cross-DeSoto-Decatur- Dunklin-Dyer-Fayette-Gibson-Greene-Hardeman-Hardin-Haywood- Henderson-Henry-Itawamba-Lafayette-Lake-Lauderdale-Lee AR-Lee MS- Madison-Marshall-McNairy-Mississippi-Monroe-Obion-Panola-Pemiscot- Phillips-Poinsett-Pontotoc-Prentiss-Quitman-Shelby-St. Francis- Tallahatchie-Tate-Tippah-Tipton-Tishomingo-Tunica-Union-Weakley- Yalobusha- 425 AM CDT Mon May 3 2021 This hazardous weather outlook is for portions of East Arkansas... the Missouri Bootheel...North Mississippi...and West Tennessee. .DAY ONE...Today and Tonight Strong to severe thunderstorms will be possible across the Mid South late tonight. Damaging wind, very large hail and tornadoes are possible. See website for additional details. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday Strong to severe thunderstorm threat will continue into Tuesday. Damaging wind, large hail and tornadoes are possible. See website for additional details. .SPOTTER INFORMATION STATEMENT... Spotter activation will likely be needed late tonight and Tuesday. Please relay any information about observed severe weather to the NWS while following all local, state, and CDC guidelines.
In the hours before
Special weather statement, May 3, 2:36 AM CDT, 5 hours 18 minutes before
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</html>Local storm report, May 3, 3:02 AM CDT, 4 hours 52 minutes before
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</html>Special weather statement, May 3, 4:48 AM CDT, 3 hours 6 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 |
|---|---|---|---|---|
| May 2, 7:42 PM CDT | Tornado Warning | MEG | Calhoun, Chickasaw | 48 min |
| May 2, 8:29 PM CDT | Tornado Warning | MEG | Calhoun, Chickasaw, Pontotoc | 46 min |
| May 2, 9:13 PM CDT | Tornado Warning | MEG | Chickasaw, Lee, Pontotoc | 47 min |
| May 2, 9:53 PM CDT | Tornado Warning | MEG | Itawamba, Lee, Prentiss, Tishomingo | 52 min |
| May 2, 10:37 PM CDT | Tornado Warning | MEG | Itawamba, Prentiss, Tishomingo | 38 min |
| May 3, 12:12 AM CDT | Special Weather Statement | MEG | Lafayette | 33 min |
| May 3, 12:38 AM CDT | Special Weather Statement | MEG | Tippah | 37 min |
| May 3, 12:48 AM CDT | Special Weather Statement | MEG | Tunica | 27 min |
| May 3, 12:49 AM CDT | Special Weather Statement | MEG | Pontotoc | 26 min |
| May 3, 1:31 AM CDT | Special Weather Statement | MEG | DeSoto | 29 min |
| May 3, 1:45 AM CDT | Severe Thunderstorm Warning | MEG | DeSoto, Marshall, Tate | 45 min |
| May 3, 2:30 AM CDT | Special Weather Statement | MEG | Benton | 30 min |
| May 3, 2:36 AM CDT | Special Weather Statement | MEG | Marshall | 24 min |
| May 3, 5:57 AM CDT | Areal Flood Advisory | MEG | DeSoto | 110 min |
| May 3, 12:05 PM CDT | Special Weather Statement | MEG | Clay | 25 min |
| May 3, 12:23 PM CDT | Special Weather Statement | MEG | Monroe | 37 min |
| May 3, 12:31 PM CDT | Special Weather Statement | MEG | Monroe | 29 min |
| May 3, 1:01 PM CDT | Special Weather Statement | MEG | Monroe | 29 min |
| May 3, 1:30 PM CDT | Special Weather Statement | MEG | Monroe | 30 min |
| May 3, 3:06 AM CDT | Special Weather Statement | MEG | Chester, Hardeman | 24 min |
| May 3, 3:35 AM CDT | Special Weather Statement | MEG | Chester | 40 min |
| May 3, 4:48 AM CDT | Special Weather Statement | MEG | Haywood | 27 min |
| May 3, 4:58 AM CDT | Special Weather Statement | MEG | McNairy | 32 min |
| May 3, 5:02 AM CDT | Areal Flood Advisory | MEG | Hardeman, Hardin, McNairy | 3 hr |
| May 3, 7:01 AM CDT | Areal Flood Advisory | MEG | Haywood, Madison, Tipton | 119 min |
| May 3, 8:21 AM CDT | Special Weather Statement | MEG | Hardeman | 24 min |
Nearby
Areal Flood Advisories in Tennessee, 2021Every areal flood 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.