Alert archive / Mississippi / Severe Thunderstorm Warnings in 2018

Severe Thunderstorm Warning 133, NWS Memphis, TN

May 25, 2018Lafayette County, Mississippi

NWS Memphis, TN issued this severe thunderstorm warning at May 25, 2018, 5:44 PM CDT for Lafayette County, Mississippi. It was in force for 31 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: May 25, 2018, 5:44 PM CDT (22:44 UTC)
Expired: May 25, 2018, 6:15 PM CDT
In force: 31 min
Issued by: NWS Memphis, TN
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

County Lafayette County, MS

The radar

The Memphis radar (KNQA), 115 km from the middle of the area, began a volume at 22:43 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 (KBYH), launched 12:00Z, 10.7 hours before the alert went out and 68 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 805 J/kg
Mixed-layer CIN: -45 J/kg
Mixed-layer LCL: 1067 m above ground
0-6 km bulk shear: 4 kt
0-1 km storm-relative helicity: -28 m²/s²
0-3 km storm-relative helicity: -15 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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 May 24, 6:32 PM CDT, 23 hours 12 minutes earlier.

Area forecast discussion, May 24, 6:32 PM CDT, 23 hours 12 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
May 25, 1:53 PM CDT	Special Weather Statement	MEG	Henderson	37 min
May 25, 2:04 PM CDT	Special Weather Statement	MEG	Hardeman	26 min
May 25, 2:17 PM CDT	Special Weather Statement	MEG	Carroll	28 min
May 25, 2:30 PM CDT	Special Weather Statement	MEG	Decatur	30 min
May 25, 3:37 PM CDT	Special Weather Statement	MEG	Shelby	23 min
May 25, 3:44 PM CDT	Special Weather Statement	MEG	Gibson	31 min
May 25, 5:27 PM CDT	Special Weather Statement	MEG	Crockett	48 min
May 25, 2:42 PM CDT	Special Weather Statement	MEG	Tallahatchie	18 min
May 25, 4:37 PM CDT	Special Weather Statement	MEG	Calhoun	38 min
May 25, 4:56 PM CDT	Special Weather Statement	MEG	Marshall	49 min
May 25, 5:40 PM CDT	Special Weather Statement	MEG	Lafayette	35 min
May 25, 5:41 PM CDT	Special Weather Statement	MEG	Benton	34 min
May 25, 6:12 PM CDT	Special Weather Statement	MEG	Lafayette	33 min
May 25, 1:47 PM CDT	Special Weather Statement	MEG	Lawrence	28 min
May 25, 2:52 PM CDT	Special Weather Statement	MEG	Cross	23 min
May 25, 3:13 PM CDT	Special Weather Statement	MEG	Craighead	32 min
May 25, 3:22 PM CDT	Areal Flood Advisory	MEG	St. Francis	53 min

Nearby

Severe Thunderstorm Warnings in Mississippi, 2018 Every 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.