Alert archive / Mississippi / Special Weather Statements in 2018

Special Weather Statement, NWS Memphis, TN

June 15, 2018Tunica County, Mississippi

NWS Memphis, TN issued this special weather statement at Jun 15, 2018, 5:40 PM CDT for Tunica County, Mississippi. It was in force for 50 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Jun 15, 2018, 5:40 PM CDT (22:40 UTC)
Expired
Jun 15, 2018, 6:30 PM CDT
In force
50 min
Issued by
NWS Memphis, TN

County Tunica County, MS

The radar

The Memphis radar (KNQA), 73 km from the middle of the area, began a volume at 22:39 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, 10.7 hours before the alert went out and 371 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, Nashville Metro, TN at 12:00Z on 2018-06-15Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1125 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, Nashville Metro, TN at 12:00Z on 2018-06-15The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -4 square meters per square second.1939Sfc1 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
1125 J/kg
Mixed-layer CIN
-124 J/kg
Mixed-layer LCL
1084 m above ground
0-6 km bulk shear
21 kt
0-1 km storm-relative helicity
-4 m²/s²
0-3 km storm-relative helicity
-24 m²/s²
Significant tornado parameter
0.0
Supercell composite
-0.1

Open this sounding in Storm Lab

The text

As transmitted.

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What forecasters said that day

The local office's own words before this special weather statement 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 special weather statement went out at Jun 15, 4:02 PM CDT, 1 hour 38 minutes earlier.

Area forecast discussion, Jun 15, 4:02 PM CDT, 1 hour 38 minutes before
Area Forecast Discussion
National Weather Service Memphis TN
402 PM CDT Fri Jun 15 2018

.DISCUSSION...

Upper level ridge will persist over the area into early next week.
However, there are some waves moving through that will cause a
chance of showers and thunderstorms mainly in the afternoons
across the Mid-South through the middle of the week. The ridge
weakens a little by the middle of the week and as another upper high
pressure system builds into the area from the southeast.

Patchy fog in the east tonight.

Heat will be the story for the weekend. The heat index will
clearly be around 100. A heat advisory may be needed over the
weekend.

TLSJr

&&

.AVIATION...

Temporary MVFR conditions at MKL and LIFR conditions at TUP are
possible again tonight. Otherwise expect VFR conditions. Isolated
afternoon thunderstorms cannot be ruled out this afternoon but
coverage is expected to be minimal.

30

&&

.MEG WATCHES/WARNINGS/ADVISORIES...
AR...Heat Advisory until 9 PM CDT this evening for Clay-Craighead-
     Crittenden-Cross-Greene-Lawrence-Mississippi-Poinsett-
     Randolph-St. Francis.

MO...Heat Advisory until 9 PM CDT this evening for Dunklin.

MS...None.
TN...None.
&&
Hazardous weather outlook, Jun 15, 1:32 PM CDT, 4 hours 8 minutes before
Hazardous Weather Outlook
National Weather Service Memphis TN
132 PM CDT Fri Jun 15 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>092-162045-
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-
132 PM CDT Fri Jun 15 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

Afternoon heat indices may exceed 105 degrees over portions of
Northeast Arkansas and The Missouri Bootheel.

.DAYS TWO THROUGH SEVEN...Saturday through Thursday

Afternoon heat indices may exceed 105 degrees over portions of
the Mid South on Saturday. A heat advisory may be required.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not anticipated at this time.

In the hours before

Special weather statement, Jun 15, 12:38 PM CDT, 5 hours 2 minutes before
Special Weather Statement
National Weather Service Memphis TN
1238 PM CDT Fri Jun 15 2018

ARZ049-058-MOZ115-MSZ001-007-010-TNZ001>004-019>021-048>052-088-
089-160000-
Lee AR-Phillips-Pemiscot-DeSoto-Tunica-Coahoma-Lake-Obion-Weakley-
Henry-Dyer-Gibson-Carroll-Lauderdale-Tipton-Haywood-Crockett-
Madison-Shelby-Fayette-
Including the cities of Marianna, Helena, West Helena,
Caruthersville, Southaven, Olive Branch, Tunica, Clarksdale,
Tiptonville, Union City, Martin, Dresden, Paris, Dyersburg,
Humboldt, Milan, Huntingdon, Ripley TN, Covington, Brownsville,
Alamo, Jackson, Bartlett, Germantown, Collierville, Memphis,
Millington, Somerville, and Oakland
1238 PM CDT Fri Jun 15 2018

...High heat index values this afternoon and Saturday...

An upper level ridge is expected to shift over the Mid South
allowing temperatures to reach into the middle 90s today and
Saturday across portions of the Midsouth. The combination of high
heat and humidity will result in heat index values between 100
and 110. A Heat Advisory is in effect for portions of Northeast
Arkansas and the Missouri Bootheel this afternoon and a larger
one will likely be required tomorrow where the Heat Index is
expected to exceed 105 degrees.

30
Special weather statement, Jun 15, 5:40 PM CDT, 0 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Jun 14, 11:12 PM CDTSevere Thunderstorm WarningMEGLake, Obion48 min
Jun 14, 11:56 PM CDTSpecial Weather StatementMEGGibson, Obion49 min
Jun 15, 12:25 PM CDTHeat AdvisoryMEGClay, Craighead, Crittenden, Cross, Greene, Lawrence and 4 more7 hr

Nearby

Special Weather Statements in Mississippi, 2018Every special weather statement 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.