Alert archive / Tennessee / Severe Thunderstorm Warnings in 2018
Severe Thunderstorm Warning 311, NWS Memphis, TN
NWS Memphis, TN issued this severe thunderstorm warning at Aug 11, 2018, 7:54 PM CDT for Lauderdale County, Tennessee; Mississippi County, Arkansas. It was in force for 51 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Aug 11, 2018, 7:54 PM CDT (00:54 UTC)
- Expired
- Aug 11, 2018, 8:45 PM CDT
- In force
- 51 min
- Issued by
- NWS Memphis, TN
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Mississippi County, AR, Lauderdale County, TN
The radar
The Memphis radar (KNQA), 47 km from the middle of the area, began a volume at 00:56 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, 0.9 hours before the alert went out and 295 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
- 254 J/kg
- Mixed-layer CIN
- -32 J/kg
- Mixed-layer LCL
- 1925 m above ground
- 0-6 km bulk shear
- 15 kt
- 0-1 km storm-relative helicity
- 26 m²/s²
- 0-3 km storm-relative helicity
- 88 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
What forecasters said that day
The local office's own words before this severe thunderstorm warning 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 severe thunderstorm warning went out at Aug 11, 7:06 PM CDT, 48 minutes earlier.
Area forecast discussion, Aug 11, 7:06 PM CDT, 48 minutes before
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</html>Hazardous weather outlook, Aug 11, 3:12 PM CDT, 4 hours 42 minutes before
Hazardous Weather Outlook...UPDATED National Weather Service Memphis TN 312 PM CDT Sat Aug 11 2018 ARZ008-009-017-018-026>028-035-036-048-049-058-MOZ113-115- MSZ001>017-020>024-TNZ001>004-019>022-048>055-088>092-122215- 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-Lawrence- Lee AR-Lee MS-Madison-Marshall-McNairy-Mississippi-Monroe-Obion- Panola-Pemiscot-Phillips-Poinsett-Pontotoc-Prentiss-Quitman- Randolph-Shelby-St. Francis-Tallahatchie-Tate-Tippah-Tipton- Tishomingo-Tunica-Union-Weakley-Yalobusha- 312 PM CDT Sat Aug 11 2018 This hazardous weather outlook is for portions of East Arkansas... the Missouri Bootheel...North Mississippi...and West Tennessee. .DAY ONE...This Afternoon and Tonight A few strong thunderstorms and perhaps an isolated severe thunderstorm is possible across Northeast Arkansas, West Tennessee and Missouri Bootheel through early this evening as a cold front pushes into the region. Damaging winds and localized heavy rainfall are the primary severe threats for any thunderstorms that reach severe limits. .DAYS TWO THROUGH SEVEN...Sunday through Friday The probability for widespread hazardous weather is low. .SPOTTER INFORMATION STATEMENT... Spotter activation is not anticipated at this time.
In the hours before
Special weather statement, Aug 11, 6:43 PM CDT, 1 hour 11 minutes before
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</html>Special weather statement, Aug 11, 6:45 PM CDT, 1 hour 9 minutes before
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</html>Special weather statement, Aug 11, 6:54 PM CDT, 1 hour before
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</html>Special weather statement, Aug 11, 7:43 PM CDT, 11 minutes before
Special Weather Statement
National Weather Service Memphis TN
743 PM CDT SAT AUG 11 2018
TNZ054-055-120130-
Henderson TN-Decatur TN-
743 PM CDT SAT AUG 11 2018
...A SIGNIFICANT WEATHER ADVISORY HAS BEEN ISSUED UNTIL 830 PM CDT
FOR...
Southeastern Henderson County in southwestern Tennessee...
Decatur County in Middle Tennessee...
At 743 PM CDT...a strong thunderstorm producing pea to dime size
hail and winds to 45 mph was located over Darden, or 7 miles
southeast of Natchez Trace State Forest, moving southeast at 10 mph.
Very heavy rain will occur with this thunderstorm.
People in southeastern Henderson and Decatur Counties should monitor
this storm closely.
LAT...LON 3549 8798 3546 8804 3539 8820 3540 8821
3541 8823 3565 8834 3574 8814 3563 8803
3562 8804 3552 8797
TIME...MOT...LOC 0043Z 330DEG 10KT 3564 8820Special weather statement, Aug 11, 7:49 PM CDT, 5 minutes before
Special Weather Statement
National Weather Service Memphis TN
749 PM CDT SAT AUG 11 2018
ARZ026-028-120115-
Craighead AR-Mississippi AR-
749 PM CDT SAT AUG 11 2018
...A SIGNIFICANT WEATHER ADVISORY HAS BEEN ISSUED UNTIL 815 PM CDT
FOR...
Southeastern Craighead County in eastern Arkansas...
Northwestern Mississippi County in eastern Arkansas...
At 748 PM CDT...a strong thunderstorm producing nickel size hail and
winds to 50 mph was located over Monette, moving south at 5 mph.
Blowing dust will occur well out ahead of this thunderstorm.
People in southeastern Craighead and northwestern Mississippi
Counties should monitor this storm closely.
LAT...LON 3571 9005 3570 9029 3571 9046 3593 9046
3596 9024
TIME...MOT...LOC 0048Z 341DEG 5KT 3588 9034The office that day
Everything else NWS Memphis, TN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 11, 7:43 PM CDT | Special Weather Statement | MEG | Decatur | 47 min |
| Aug 11, 11:03 PM CDT | Special Weather Statement | MEG | Madison | 42 min |
| Aug 11, 11:41 PM CDT | Special Weather Statement | MEG | Henderson | 49 min |
| Aug 12, 12:26 AM CDT | Special Weather Statement | MEG | Decatur, Henderson | 49 min |
| Aug 12, 5:07 PM CDT | Special Weather Statement | MEG | Lee | 23 min |
| Aug 12, 5:13 PM CDT | Areal Flood Advisory | MEG | Lee, Monroe, Pontotoc | 62 min |
| Aug 12, 5:28 PM CDT | Special Weather Statement | MEG | Lee | 32 min |
| Aug 11, 7:49 PM CDT | Special Weather Statement | MEG | Mississippi | 26 min |
| Aug 11, 8:14 PM CDT | Special Weather Statement | MEG | Mississippi | 31 min |
| Aug 11, 8:37 PM CDT | Special Weather Statement | MEG | Mississippi | 38 min |
Nearby
Severe Thunderstorm Warnings in Tennessee, 2018Severe Thunderstorm Warnings in Arkansas, 2018Every severe thunderstorm warning in 2018
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.