Alert archive / Mississippi / Severe Thunderstorm Warnings in 2020

Severe Thunderstorm Warning 120, NWS Memphis, TN

April 9, 20204 counties in Mississippi

NWS Memphis, TN issued this severe thunderstorm warning at Apr 9, 2020, 3:50 AM CDT for 4 counties in Mississippi. It was in force for 40 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
Apr 9, 2020, 3:50 AM CDT (08:50 UTC)
Expired
Apr 9, 2020, 4:30 AM CDT
In force
40 min
Issued by
NWS Memphis, TN
Area
Storm-based polygon
Hail
1.5 in
Wind
60.0 mph

Counties Calhoun County, MS, Chickasaw County, MS, Monroe County, MS, Pontotoc County, MS

The radar

The Columbus AFB radar (KGWX), 58 km from the middle of the area, began a volume at 08:51 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 00:00Z, 8.8 hours before the alert went out and 131 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.

Skew-T log-pSkew-T log-p diagram, Little Rock, AR at 00:00Z on 2020-04-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1810 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Little Rock, AR at 00:00Z on 2020-04-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 113 square meters per square second.1939587897117Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
1810 J/kg
Mixed-layer CIN
-112 J/kg
Mixed-layer LCL
1529 m above ground
0-6 km bulk shear
56 kt
0-1 km storm-relative helicity
113 m²/s²
0-3 km storm-relative helicity
132 m²/s²
Significant tornado parameter
0.4
Supercell composite
8.3

Open this sounding in Storm Lab

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 Apr 9, 12:23 AM CDT, 3 hours 27 minutes earlier.

Area forecast discussion, Apr 9, 12:23 AM CDT, 3 hours 27 minutes before
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Hazardous weather outlook, Apr 8, 6:36 PM CDT, 9 hours 14 minutes before
Hazardous Weather Outlook
National Weather Service Memphis TN
636 PM CDT Wed Apr 8 2020

ARZ009-018-026>028-035-036-048-049-058-MOZ113-115-MSZ001>017-
020>024-TNZ001>004-019>022-048>055-088>092-100145-
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-
636 PM CDT Wed Apr 8 2020

This hazardous weather outlook is for portions of East Arkansas...
the Missouri Bootheel...North Mississippi...and West Tennessee.

.DAY ONE...Tonight

Severe thunderstorms are expected tonight through early Thursday
morning across Northeast Arkansas, the Missouri Bootheel, and West
Tennessee. The primary threats include large hail and damaging
winds. Tornadoes and localized heavy rainfall will be secondary
threats.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday

Strong to severe storms are possible across portions northeast
Mississippi Sunday.

.SPOTTER INFORMATION STATEMENT...

Spotter activation may be needed this evening. Please relay any
information about observed severe weather to the NWS while
following all local, state, and CDC guidelines.

In the hours before

Local storm report, Apr 9, 1:17 AM CDT, 2 hours 33 minutes before
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Local storm report, Apr 9, 1:22 AM CDT, 2 hours 28 minutes before
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Local storm report, Apr 9, 1:40 AM CDT, 2 hours 10 minutes before
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Local storm report, Apr 9, 1:41 AM CDT, 2 hours 9 minutes before
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Local storm report, Apr 9, 2:43 AM CDT, 1 hour 7 minutes before
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Special weather statement, Apr 9, 3:15 AM CDT, 35 minutes before
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The office that day

Everything else NWS Memphis, TN issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Apr 8, 10:46 PM CDTSevere Thunderstorm WarningMEGBenton, Marshall, Tippah44 min
Apr 8, 11:17 PM CDTSevere Thunderstorm WarningMEGAlcorn, Benton, Tippah43 min
Apr 8, 11:34 PM CDTSevere Thunderstorm WarningMEGAlcorn, Prentiss, Tippah41 min
Apr 8, 11:52 PM CDTSevere Thunderstorm WarningMEGAlcorn, Prentiss, Tippah, Tishomingo38 min
Apr 9, 12:31 AM CDTSevere Thunderstorm WarningMEGAlcorn, Tishomingo44 min
Apr 9, 3:15 AM CDTSpecial Weather StatementMEGLafayette, Panola, Yalobusha30 min
Apr 8, 7:58 PM CDTSevere Thunderstorm WarningMEGBenton, Henry47 min
Apr 8, 8:19 PM CDTSpecial Weather StatementMEGWeakley41 min
Apr 8, 8:33 PM CDTSevere Thunderstorm WarningMEGCrockett, Dyer, Gibson, Haywood, Lauderdale42 min
Apr 8, 8:37 PM CDTSevere Thunderstorm WarningMEGBenton, Henry, Weakley38 min
Apr 8, 9:00 PM CDTSevere Thunderstorm WarningMEGShelby, Tipton45 min
Apr 8, 9:04 PM CDTSevere Thunderstorm WarningMEGBenton, Carroll, Henry41 min
Apr 8, 9:30 PM CDTSpecial Weather StatementMEGCrockett30 min
Apr 8, 9:36 PM CDTSevere Thunderstorm WarningMEGShelby39 min
Apr 8, 10:02 PM CDTSpecial Weather StatementMEGMadison43 min
Apr 8, 10:05 PM CDTSpecial Weather StatementMEGFayette, Haywood40 min
Apr 8, 10:17 PM CDTSevere Thunderstorm WarningMEGFayette, Shelby28 min
Apr 8, 10:48 PM CDTSevere Thunderstorm WarningMEGLauderdale42 min
Apr 8, 10:54 PM CDTSevere Thunderstorm WarningMEGLauderdale51 min
Apr 8, 11:38 PM CDTSevere Thunderstorm WarningMEGLauderdale, Tipton52 min
Apr 9, 12:08 AM CDTSpecial Weather StatementMEGHardeman, McNairy52 min
Apr 8, 7:06 PM CDTSevere Thunderstorm WarningMEGCraighead, Poinsett39 min
Apr 8, 7:12 PM CDTSpecial Weather StatementMEGGreene33 min
Apr 8, 7:35 PM CDTTornado WarningMEGCraighead, Poinsett25 min
Apr 8, 7:39 PM CDTSevere Thunderstorm WarningMEGClay, Greene36 min
Apr 8, 7:53 PM CDTTornado Warning Tornado observedMEGCraighead, Poinsett52 min
Apr 8, 7:57 PM CDTSevere Thunderstorm WarningMEGCraighead, Poinsett48 min
Apr 8, 8:36 PM CDTTornado WarningMEGCrittenden, Cross, Poinsett26 min
Apr 8, 9:27 PM CDTSevere Thunderstorm WarningMEGClay, Greene48 min
Apr 8, 9:55 PM CDTAreal Flood AdvisoryMEGClay, Greene3 hr
Apr 8, 10:12 PM CDTSevere Thunderstorm WarningMEGClay, Greene, Mississippi48 min
Apr 8, 10:37 PM CDTSpecial Weather StatementMEGMississippi23 min
Apr 8, 11:03 PM CDTAreal Flood AdvisoryMEGMississippi3 hr

Nearby

Severe Thunderstorm Warnings in Mississippi, 2020Every severe thunderstorm warning 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.