Alert archive / Mississippi / Severe Thunderstorm Warnings in 2018
Severe Thunderstorm Warning 220, NWS Memphis, TN
NWS Memphis, TN issued this severe thunderstorm warning at Jun 23, 2018, 9:33 AM CDT for Alcorn County, Prentiss County, Tishomingo County, Mississippi. It was in force for 42 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
- Jun 23, 2018, 9:33 AM CDT (14:33 UTC)
- Expired
- Jun 23, 2018, 10:15 AM CDT
- In force
- 42 min
- Issued by
- NWS Memphis, TN
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Alcorn County, MS, Prentiss County, MS, Tishomingo County, MS
The radar
The Columbus AFB radar (KGWX), 95 km from the middle of the area, began a volume at 14:33 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, 2.6 hours before the alert went out and 227 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
- 25 J/kg
- Mixed-layer CIN
- -55 J/kg
- Mixed-layer LCL
- 952 m above ground
- 0-6 km bulk shear
- 41 kt
- 0-1 km storm-relative helicity
- 127 m²/s²
- 0-3 km storm-relative helicity
- 140 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 Jun 23, 6:42 AM CDT, 2 hours 51 minutes earlier.
Area forecast discussion, Jun 23, 6:42 AM CDT, 2 hours 51 minutes before
Area Forecast Discussion National Weather Service Memphis TN 642 AM CDT Sat Jun 23 2018 .DISCUSSION... /issued 433 AM CDT Sat Jun 23 2018/ A mesoscale convective system (MCS) had entered western AR at 4 AM CDT, on schedule with earlier forecasts. This feature will continue east across AR, entering eastern part of the state by 7 AM or so. Expect a gradual weakening in the interim. Outflow boundaries and a potential mesoscale convective vortex (MCV) may provide focus to storm redevelopment over the Midsouth later this morning and afternoon. Instability should stout, with NAM Bufr soundings depicting surface-based CAPE in excess of 4000 J/KG, aided by mid- 70s dewpoints along and south of I-40. Storms should exit to the east of the TN River by early evening, as attention turns upstream to the southern plains for a potential MCS arrival to the Midsouth early Sunday morning. Given upper level ridge amplification along the gulf coast, main storm track Saturday night will shift to the north relative to the previous night, and extend from northeast AR through northwest TN. The aforementioned midlevel height ridge to our south will amplify further on Monday, shifting the main storm track north by Monday night, into the mid-MS River valley. Midlevel heights may depress just enough Tuesday with a passing trof to our north, for a few storms to develop across northwest TN, down through the TN River valley. From Thursday through next weekend, a 594dm 500mb height ridge center will shift from the southern plains into the Ohio River valley. Hot and humid conditions will prevail over the Midsouth, tempered slightly by easterly flow and weakened convective inhibition around the base of the ridge over the weekend. In the interim, it appears heat indices may exceed 105 degrees by Tuesday and peak during the mid to late portion of next week. PWB && .AVIATION... 12Z TAF Set A dying MCS is moving along I-40 and will be approaching KMEM by 13Z and KMKL by 14-15Z. Have added TEMPO groups for the convection. Meanwhile, convection has fired up near KTUP during the overnight hours thus will carry a tempo group through 16Z. Several CAM models show additional scattered convection developing during the afternoon hours thus carried vicinity wording through 01Z. Another MCS may develop and affect KJBR, KMKL, and KMEM after 06Z. For now have just introduced vicinity wording. KTUP could see some fog development after 09Z. Winds will generally be from the WSW between 5-8 KTs outside of convection. KMEM and KJBR may see some gusts up to 15 KTS during the afternoon hours. KRM && && .MEG WATCHES/WARNINGS/ADVISORIES... AR...None. MO...None. MS...None. TN...None. &&
Hazardous weather outlook, Jun 23, 3:17 AM CDT, 6 hours 16 minutes before
Hazardous Weather Outlook National Weather Service Memphis TN 317 AM CDT Sat Jun 23 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>092-241030- 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- 317 AM CDT Sat Jun 23 2018 This hazardous weather outlook is for portions of East Arkansas... the Missouri Bootheel...North Mississippi...and West Tennessee. .DAY ONE...Today and Tonight There is a Slight Risk for severe thunderstorms today over all the Midsouth. The primary severe weather threat will be damaging winds, with a secondary threat of large hail. Locally heavy rainfall will be possible. .DAYS TWO THROUGH SEVEN...Sunday through Friday There is a Marginal Risk of severe thunderstorms over northwest Tennessee Sunday and Sunday night. Damaging winds and large hail will be possible. Afternoon heat indices may reach or exceed 105 degrees much of next week. .SPOTTER INFORMATION STATEMENT... Spotter activation may be needed today. PWB
In the hours before
Local storm report, Jun 23, 8:49 AM CDT, 44 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MEMPHIS TN
849 AM CDT SAT JUN 23 2018
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0830 AM TSTM WND DMG 5 S COLLIERVILLE 34.98N 89.68W
06/23/2018 MARSHALL MS TRAINED SPOTTER
LARGE TREE LIMBS DOWN JUST SOUTH OF COLLIERVILLE. TIME OF
EVENT IS RADAR ESTIMATED.
&&
HGWSpecial weather statement, Jun 23, 8:53 AM CDT, 40 minutes before
Special Weather Statement National Weather Service Memphis TN 853 AM CDT SAT JUN 23 2018 MSZ003>005-009-014-231445- Tippah MS-Union MS-Benton MS-Alcorn MS-Prentiss MS- 853 AM CDT SAT JUN 23 2018 ...A SIGNIFICANT WEATHER ADVISORY HAS BEEN ISSUED UNTIL 945 AM CDT FOR... Tippah County in northeastern Mississippi... Northeastern Union County in northeastern Mississippi... Northeastern Benton County in northeastern Mississippi... Alcorn County in northeastern Mississippi... Western Prentiss County in northeastern Mississippi... At 852 AM CDT...a strong thunderstorm producing winds at least 40 mph was located near Snow Lake Shores, or 14 miles west of Ripley, moving east at 50 mph. Very heavy rain along with continuous cloud to ground lightning are also possible with this thunderstorm. People in Tippah...northeastern Union...northeastern Benton...Alcorn and western Prentiss Counties should monitor this storm closely. LAT...LON 3451 8854 3451 8909 3499 8908 3499 8837 TIME...MOT...LOC 1352Z 262DEG 45KT 3481 8918
Local storm report, Jun 23, 8:55 AM CDT, 38 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MEMPHIS TN
855 AM CDT SAT JUN 23 2018
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0815 AM TSTM WND DMG GERMANTOWN 35.09N 89.79W
06/23/2018 SHELBY TN LAW ENFORCEMENT
MULTIPLE FALLEN TREES REPORTED BY LAW ENFORCEMENT IN
GERMANTOWN. TIME OF EVENT IS RADAR ESTIMATED.
&&
HGWLocal storm report, Jun 23, 9:01 AM CDT, 32 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MEMPHIS TN
901 AM CDT SAT JUN 23 2018
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0813 AM TSTM WND GST 5 NNE SOUTHAVEN 35.05N 89.97W
06/23/2018 M65 MPH SHELBY TN NWS EMPLOYEE
THE INTEGRATED TERMINAL WEATHER SYSTEM AT THE MEMPHIS
INTERNATIONAL AIRPORT REPORTED A WIND GUST OF 65 MPH.
&&
HGWSpecial weather statement, Jun 23, 9:10 AM CDT, 23 minutes before
Special Weather Statement National Weather Service Memphis TN 910 AM CDT SAT JUN 23 2018 MSZ006-009-014>017-022>024-231515- Itawamba MS-Pontotoc MS-Tishomingo MS-Union MS-Monroe MS-Lee MS- Calhoun MS-Prentiss MS-Chickasaw MS- 910 AM CDT SAT JUN 23 2018 ...A SIGNIFICANT WEATHER ADVISORY HAS BEEN ISSUED UNTIL 1015 AM CDT FOR... Itawamba County in northeastern Mississippi... Pontotoc County in northeastern Mississippi... South central Tishomingo County in northeastern Mississippi... Southeastern Union County in northeastern Mississippi... Northern Monroe County in northeastern Mississippi... Lee County in northeastern Mississippi... Northeastern Calhoun County in northeastern Mississippi... Southern Prentiss County in northeastern Mississippi... Northern Chickasaw County in northeastern Mississippi... At 910 AM CDT...a strong thunderstorm producing winds at least 40 mph was located over Ecru, or near Pontotoc, moving east at 40 mph. Very heavy rain along with continuous cloud to ground lightning are also possible with this thunderstorm. People in Itawamba...Pontotoc...south central Tishomingo... southeastern Union...northern Monroe...Lee...northeastern Calhoun... southern Prentiss and northern Chickasaw Counties should monitor this storm closely. LAT...LON 3399 8822 3399 8932 3451 8909 3451 8815 TIME...MOT...LOC 1410Z 274DEG 36KT 3432 8903
Local storm report, Jun 23, 9:12 AM CDT, 21 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MEMPHIS TN
912 AM CDT SAT JUN 23 2018
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0830 AM TSTM WND DMG COLLIERVILLE 35.06N 89.68W
06/23/2018 SHELBY TN PUBLIC
PICTURE ON SOCIAL MEDIA OF MULTIPLE TREES DOWN IN
COLLIERVILLE. TIME OF EVENT IS RADAR ESTIMATED.
&&
HGWThe office that day
Everything else NWS Memphis, TN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 23, 7:24 AM CDT | Severe Thunderstorm Warning | MEG | Shelby | 51 min |
| Jun 23, 7:54 AM CDT | Severe Thunderstorm Warning | MEG | Fayette, Shelby | 51 min |
| Jun 23, 8:29 AM CDT | Severe Thunderstorm Warning | MEG | Fayette, Hardeman | 46 min |
| Jun 23, 8:58 AM CDT | Severe Thunderstorm Warning | MEG | Chester, Hardeman, McNairy | 47 min |
| Jun 23, 9:35 AM CDT | Severe Thunderstorm Warning | MEG | Chester, Decatur, Hardin, McNairy | 55 min |
| Jun 23, 5:25 AM CDT | Special Weather Statement | MEG | Pontotoc | 50 min |
| Jun 23, 5:27 AM CDT | Special Weather Statement | MEG | Lee | 48 min |
| Jun 23, 6:14 AM CDT | Special Weather Statement | MEG | Monroe | 46 min |
| Jun 23, 6:22 AM CDT | Severe Thunderstorm Warning | MEG | Chickasaw, Lee, Monroe | 53 min |
| Jun 23, 7:04 AM CDT | Special Weather Statement | MEG | Itawamba | 26 min |
| Jun 23, 7:20 AM CDT | Severe Thunderstorm Warning | MEG | Coahoma, Panola, Quitman, Tate, Tunica | 40 min |
| Jun 23, 7:30 AM CDT | Special Weather Statement | MEG | Coahoma, Quitman | 45 min |
| Jun 23, 7:50 AM CDT | Severe Thunderstorm Warning | MEG | Lafayette, Marshall, Panola, Quitman, Tate, Tunica | 40 min |
| Jun 23, 8:27 AM CDT | Special Weather Statement | MEG | Benton, Lafayette, Marshall | 48 min |
| Jun 23, 8:53 AM CDT | Special Weather Statement | MEG | Alcorn, Prentiss, Tippah | 52 min |
| Jun 23, 9:10 AM CDT | Special Weather Statement | MEG | Itawamba, Lee, Pontotoc, Union | 65 min |
| Jun 23, 6:38 AM CDT | Severe Thunderstorm Warning | MEG | Lee, Phillips, St. Francis | 52 min |
Nearby
Severe Thunderstorm Warnings in Mississippi, 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.