Alert archive / Mississippi / Special Weather Statements in 2021

Special Weather Statement, NWS Memphis, TN

December 6, 2021Calhoun County, Chickasaw County, Mississippi

NWS Memphis, TN issued this special weather statement at Dec 6, 2021, 6:32 AM CST for Calhoun County, Chickasaw County, Mississippi. It was in force for 28 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
Dec 6, 2021, 6:32 AM CST (12:32 UTC)
Expired
Dec 6, 2021, 7:00 AM CST
In force
28 min
Issued by
NWS Memphis, TN
Hail
0.25 in
Wind
40

Counties Calhoun County, MS, Chickasaw County, MS

The radar

The Columbus AFB radar (KGWX), 61 km from the middle of the area, began a volume at 12:33 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

Little Rock, AR (KLZK), launched 12:00Z, 0.5 hours before the alert went out and 138 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 12:00Z on 2021-12-06Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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 12:00Z on 2021-12-06The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -176 square meters per square second.19395878Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
792 m above ground
0-6 km bulk shear
61 kt
0-1 km storm-relative helicity
-176 m²/s²
0-3 km storm-relative helicity
-47 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

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 Dec 6, 5:02 AM CST, 1 hour 30 minutes earlier.

Area forecast discussion, Dec 6, 5:02 AM CST, 1 hour 30 minutes before
Area Forecast Discussion
National Weather Service Memphis TN
502 AM CST Mon Dec 6 2021

.DISCUSSION... /issued 439 AM CST Mon Dec 6 2021/

Cool, dry and seasonal early December weather will prevail across
the Midsouth through midweek, following this morning's cold
frontal passage. Strong northerly winds will lighten overnight,
but probably not go completely calm, as surface high pressure
settles into Illinois. These light winds and dry air (lower to mid
20s dewpoints), should preclude fog/freezing fog formation late
tonight.

Fast zonal flow aloft will prevail until a weak upper trof passage
early Wednesday morning. This feature should pass through the
area dry, given the lack of return flow moisture in the Midsouth.
Main impact would be an increase in midlevel clouds.

Zonal flow an low amplitude ridging will prevail Thursday and
Friday, with strengthening low level return flow. Milder overnight
lows will accompany increased surface dewpoints. A few showers
will also be possible, aided by warm advection.

A progressive longwave trof remains on track to pass from the
plains into the MS River valley on Saturday. This feature will
bring our next appreciable rain chances, and perhaps a few strong
storms. Dry conditions should for Sunday, with upstream ridging
set to move into the Midsouth early next week.

PWB

&&

.AVIATION...

12Z TAF Set

Convection along and ahead of a cold front will continue to sink
southeastward across the Mid-South this morning. IFR/MVFR
conditions will occur with the convection. Expect conditions to
improve to VFR pretty quickly behind the front. Gusty Northerly
winds will occur behind the front as well. Expect speeds sustained
at 12-16 KTS with gusts up to 25 KTS. Speeds will begin to
diminish around sunset as the direction begins to shift to the NE.

KRM

&&

&&

.MEG WATCHES/WARNINGS/ADVISORIES...
AR...None.
MO...None.
MS...None.
TN...None.
&&
Hazardous weather outlook, Dec 6, 4:04 AM CST, 2 hours 28 minutes before
Hazardous Weather Outlook
National Weather Service Memphis TN
404 AM CST Mon Dec 6 2021

ARZ009-018-026>028-035-036-048-049-058-MOZ113-115-MSZ001>017-
020>024-TNZ001>004-019>022-048>055-088>092-071215-
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-
404 AM CST Mon Dec 6 2021

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 Marginal Risk for severe thunderstorms this morning,
along and south of the Interstate 40 corridor. A few storms could
produce damaging winds. Otherwise, localized flash flooding will
be the primary severe weather threat.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday

Strong thunderstorms will be possible Friday night into early
Saturday.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not anticipated at this time.

PWB

In the hours before

Special weather statement, Dec 6, 5:15 AM CST, 1 hour 17 minutes before
Special Weather Statement
National Weather Service Memphis TN
515 AM CST Mon Dec 6 2021

MSZ020-021-061145-
Tallahatchie MS-Yalobusha MS-
515 AM CST Mon Dec 6 2021

...A strong thunderstorm will impact portions of western Yalobusha
and east central Tallahatchie Counties through 545 AM CST...

At 515 AM CST, Doppler radar was tracking a strong thunderstorm near
Paynes, or 7 miles southwest of Charleston, moving east at 50 mph.

HAZARD...Winds in excess of 40 mph and penny size hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor damage to outdoor objects is
         possible.

Locations impacted include...
Charleston, Coffeeville, Paynes, Scobey, Velma, Oakland, Bryant,
Leverett, Tippo, Effie, Tillatoba and Rosebloom.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 3386 9021 3399 9023 3413 8965 3387 8965
      3387 8977 3390 8977 3390 8992 3386 8993
TIME...MOT...LOC 1115Z 268DEG 45KT 3393 9014

MAX HAIL SIZE...0.75 IN
MAX WIND GUST...40 MPH

MJ
Local storm report, Dec 6, 5:44 AM CST, 48 minutes before
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Special weather statement, Dec 6, 5:47 AM CST, 45 minutes before
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Special weather statement, Dec 6, 6:15 AM CST, 17 minutes before
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Local storm report, Dec 6, 6:29 AM CST, 3 minutes before
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Special weather statement, Dec 6, 6:32 AM CST, 0 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Dec 6, 4:45 AM CSTSpecial Weather StatementMEGBenton, Tippah30 min
Dec 6, 4:58 AM CSTSpecial Weather StatementMEGLafayette, Union32 min
Dec 6, 5:09 AM CSTSevere Thunderstorm WarningMEGLafayette, Marshall, Pontotoc, Union36 min
Dec 6, 5:11 AM CSTSpecial Weather StatementMEGAlcorn, Tippah34 min
Dec 6, 5:15 AM CSTSpecial Weather StatementMEGTallahatchie, Yalobusha30 min
Dec 6, 5:35 AM CSTSevere Thunderstorm WarningMEGItawamba, Lee, Pontotoc, Prentiss, Tippah, Tishomingo and 1 more40 min
Dec 6, 5:47 AM CSTSpecial Weather StatementMEGCalhoun, Lee, Pontotoc43 min
Dec 6, 6:15 AM CSTSpecial Weather StatementMEGItawamba, Lee30 min
Dec 6, 7:04 AM CSTAreal Flood AdvisoryMEGCalhoun, Chickasaw, Yalobusha3 hr
Dec 6, 2:55 AM CSTSpecial Weather StatementMEGLake, Obion35 min
Dec 6, 3:10 AM CSTSpecial Weather StatementMEGShelby, Tipton35 min
Dec 6, 3:28 AM CSTSpecial Weather StatementMEGDyer, Weakley32 min
Dec 6, 3:44 AM CSTSevere Thunderstorm WarningMEGBenton, Henry, Weakley31 min
Dec 6, 3:45 AM CSTSpecial Weather StatementMEGFayette, Haywood, Madison30 min
Dec 6, 4:25 AM CSTAreal Flood AdvisoryMEGCrockett, Haywood, Lauderdale, Tipton2 hr
Dec 6, 4:36 AM CSTSpecial Weather StatementMEGCarroll, Henderson, Madison24 min
Dec 6, 1:36 AM CSTSpecial Weather StatementMEGClay24 min
Dec 6, 2:00 AM CSTSpecial Weather StatementMEGClay30 min
Dec 5, 6:54 PM CSTSpecial Weather StatementMEGDunklin36 min
Dec 6, 2:29 AM CSTSpecial Weather StatementMEGDunklin, Pemiscot31 min

Nearby

Special Weather Statements in Mississippi, 2021Every special weather statement in 2021

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.