Alert archive / Tennessee / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 59, NWS Memphis, TN

March 9, 2017Decatur County, Tennessee

NWS Memphis, TN issued this severe thunderstorm warning at Mar 9, 2017, 10:00 PM CST for Decatur County, Tennessee. It was in force for 45 min. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Mar 9, 2017, 10:00 PM CST (04:00 UTC)
Expired: Mar 9, 2017, 10:45 PM CST
In force: 45 min
Issued by: NWS Memphis, TN
Area: Storm-based polygon
Tornado: Possible
Hail: 1.0 in
Wind: 70.0 mph

County Decatur County, TN

The radar

The Ft Campbell radar (KHPX), 140 km from the middle of the area, began a volume at 04:01 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.

What was reported inside it

Time	Report	Where	Remark
Mar 9, 10:16 PM CST	TSTM WND DMG	Parsons, TN	TREES DOWN ON 4TH STREET AND ALSO ON BEAR CREEK ROAD IN PARSONS. TIME IS RADAR ESTIMATED.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

Did it verify

Verified. The Iowa Environmental Mesonet's Cow matched 2 storm reports to this severe thunderstorm warning; the first came 16 minutes after it went out.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Mar 9, 6:42 PM CST	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 00:00Z, 4.0 hours before the alert went out and 142 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 2824 m above ground
0-6 km bulk shear: 52 kt
0-1 km storm-relative helicity: 111 m²/s²
0-3 km storm-relative helicity: 169 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

504 
WUUS54 KMEG 100400
SVRMEG
TNC039-100445-
/O.NEW.KMEG.SV.W.0059.170310T0400Z-170310T0445Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Memphis TN
1000 PM CST THU MAR 9 2017

The National Weather Service in Memphis has issued a

* Severe Thunderstorm Warning for...
  Decatur County in western Tennessee...

* Until 1045 PM CST

* At 959 PM CST, severe thunderstorms were located along a line
  extending from near Bruceton to near Natchez Trace State Park to 
  near Blue Goose, moving southeast at 70 mph. Brief tornadoes may 
  occur within this fast moving line of storms.

  HAZARD...70 mph wind gusts and quarter size hail. 

  SOURCE...Radar indicated. 

  IMPACT...Hail damage to vehicles is expected. Expect considerable 
           tree damage. Wind damage is also likely to mobile homes, 
           roofs, and outbuildings. 

* Locations impacted include...
  Parsons, Decaturville, Scotts Hill, Perryville, Gumdale,
  Busseltown, Jeannette, Wilkinstown, Haney, Mount Tabor, Sugar Tree,
  Garrett, Beacon, Hickory Forks, Largo, Cozette, Bible Hill and
  Mount Lebanon.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 3548 8799 3547 8802 3545 8804 3543 8803
      3551 8824 3561 8819 3563 8820 3566 8819
      3585 8818 3584 8808 3585 8805 3584 8803
      3581 8803 3582 8797 3576 8799 3572 8803
      3566 8802 3562 8804 3552 8797
TIME...MOT...LOC 0359Z 292DEG 73KT 3596 8827 3583 8826 3572 8867 

TORNADO...POSSIBLE
HAIL...1.00IN
WIND...70MPH
 
$$

1 follow-up statement

163 
WWUS54 KMEG 100446
SVSMEG

Severe Weather Statement
National Weather Service Memphis TN
1046 PM CST THU MAR 9 2017

TNC039-100456-
/O.EXP.KMEG.SV.W.0059.000000T0000Z-170310T0445Z/
Decatur TN-
1046 PM CST THU MAR 9 2017

...THE SEVERE THUNDERSTORM WARNING FOR DECATUR COUNTY HAS EXPIRED...
    
The storms which prompted the warning have moved out of the area.
Therefore the warning has been allowed to expire.

A severe thunderstorm watch remains in effect until midnight CST for
western Tennessee.

LAT...LON 3548 8799 3547 8802 3545 8804 3543 8803
      3551 8824 3561 8819 3563 8820 3566 8819
      3585 8818 3584 8808 3585 8805 3584 8803
      3581 8803 3582 8797 3576 8799 3572 8803
      3566 8802 3562 8804 3552 8797
TIME...MOT...LOC 0446Z 292DEG 73KT 3561 8723 3548 8722 3538 8763 

$$

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 Mar 9, 5:33 PM CST, 4 hours 27 minutes earlier.

Area forecast discussion, Mar 9, 5:33 PM CST, 4 hours 27 minutes before

Area Forecast Discussion
National Weather Service Memphis TN
533 PM CST Thu Mar 9 2017

.UPDATE...
Updated to add 00Z Aviation Discussion.

&&
.DISCUSSION... /issued Issued by National Weather Service Little
Rock AR/

SHORT TERM...Tonight Through Saturday Night

The main concern for the short term period will be the possibility
of strong to severe storms this evening, and then the chances for
some wintry precipitation on Saturday morning and again Saturday
evening/night.

First up, the storms tonight. A cold front across eastern Kansas
through central Missouri. Guidance points to the development of an
MCS in southwestern Missouri, and pushes it southeast through
northern and northeastern Arkansas and western Tennessee through the
evening hours through around or shortly after midnight. By 2-3am it
appears storms will be south of the forecast area so this will be a
quick hitting bout of storms. While some threat of tornadoes does
exist in southwest Missouri and northwest Arkansas, the main threats
for our forecast area will be the possibility of damaging winds.
Expect these storms to roll through the Memphis metro area between
10pm-Midnight.

Regarding the wintry weather on Sat morning and then again Sat night
into Sun morning, it appears likely that at least some wintry
precipitation will be seen. Saturday morning will be mainly near
the Missouri and Kentucky state lines, well north of the metro.
The limiting factor there will be the actual presence of
precipitation. Decent dry/cold air maintenance in northeast
surface flow will allow for conditions prime for wet bulb
processes to hold temperatures down to around the freezing mark
for a few hours after daybreak. The most likely precip type would
be sleet. However, models are very limited in the amount of
precipitation they're producing so this doesn't appear to be much
of a worry. It may be more of a situation where there's some
light returns on radar but nothing reaches the ground. The bigger
concern is Saturday night into Sunday morning. A more significant
swath of precipitation should occur in temperatures sufficient for
wintry precipitation, and expect to see around an inch of snow
fall across northeast Arkansas, western Tennessee, and northern
Mississippi. Have foregone the issuance of any headlines at this
time because this is still a couple of days out, and minor changes
in temperature forecasts could result in noticeably different
precipitation types. But it is definitely worth keeping an eye on,
as it would affect a broad area. &&

LONG TERM...Sunday Through Thursday

Dry and colder conditions will start off the period as wintry
precip comes to an end early Sun morning. Sfc high pressure will
settle over the Mid-South to close out the weekend. Highs on Sun
will be in the 40s and 50s. Many locations along and N of the I-40
corridor will likely see sub-freezing temps by Mon morning.

The airmass will briefly modify on Mon ahead of a quick moving
storm sys. Small rain chcs were mentioned over mainly the north
half of the FA Mon and Mon evening. Rain amounts are expected to
be light due to the lack of significant moisture return.

Models are at odds regarding several additional weak weather
systems passing across the area towards the middle of the week.
Included rain chances for Thursday, as the associated system looks
to at least have ample moisture/lift. Temperatures will be warming
by the end of the period, so no concerns for any additional winter
weather.

&&

.AVIATION...
00Z TAFs

Cluster of showers and thunderstorms over Southern Missouri
expected to develop into a convective complex and drop SSE into
the Lower Mississippi Valley this evening affecting JBR between
10/03Z-05Z, MEM and MKL between 10/04Z-07Z, and TUP between 10
/05Z-08Z. MVFR/IFR conditions possible within thunderstorms. S
winds will veer NW and become gusty with passage of convective
complex and gradually veer N/NE with passage of cold front Friday
morning. Winds expected to gradually lighten by Friday afternoon.

CJC

&&

.MEG WATCHES/WARNINGS/ADVISORIES...
AR...None.
MO...None.
MS...None.
TN...None.
&&

Hazardous weather outlook, Mar 9, 3:30 PM CST, 6 hours 30 minutes before

Hazardous Weather Outlook
National Weather Service Memphis TN
330 PM CST Thu Mar 9 2017

ARZ008-009-017-018-026>028-035-036-048-049-058-MOZ113-115-
MSZ001>017-020>024-TNZ001>004-019>022-048>055-088>092-102330-
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-
330 PM CST Thu Mar 9 2017

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

.DAY ONE...Tonight

Severe storms are possible across the Mid-South tonight,
especially across Northeast Arkansas, the Missouri Bootheel and
West Tennessee. The primary threats will be damaging winds and
large hail.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday

There is the potential for accumulating winter precipitation
across northern portions of the Mid South including Eastern
Arkansas, the Missouri Bootheel, and West Tennessee for late
Saturday afternoon and Saturday night.

Freezing temperatures are anticipated over a large portion of the
Midsouth each night from Saturday night through Tuesday night.

.SPOTTER INFORMATION STATEMENT...

Spotter activation may be needed across the Midsouth tonight.

SJM

In the hours before

Local storm report, Mar 9, 9:40 PM CST, 20 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MEMPHIS TN
940 PM CST THU MAR 09 2017

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0939 PM     HAIL             JACKSON                 35.63N 88.83W
03/09/2017  E1.00 INCH       MADISON            TN   TRAINED SPOTTER

            ONE INCH HAIL IN THE UNION UNIVERSITY AREA.

&&

MRM

Special weather statement, Mar 9, 9:43 PM CST, 17 minutes before

Special Weather Statement
National Weather Service Memphis TN
943 PM CST THU MAR 9 2017

ARZ017-018-026-028-MOZ113-100430-
Greene AR-Craighead AR-Lawrence AR-Mississippi AR-Dunklin MO-
943 PM CST THU MAR 9 2017

...A SIGNIFICANT WEATHER ADVISORY HAS BEEN ISSUED UNTIL 1030 PM CST
FOR...

Greene County in eastern Arkansas...
Northern Craighead County in eastern Arkansas...
Southern Lawrence County in eastern Arkansas...
Northwestern Mississippi County in eastern Arkansas...
Southwestern Dunklin County in southeastern Missouri...

At 942 PM CST...strong thunderstorms were producing pea size hail or
larger and winds at least 40 mph was located along a line extending
from near Marmaduke to near Walnut Ridge. Movement was  southeast at
30 mph.

Very heavy rain along with continuous cloud to ground lightning are
also possible with this thunderstorm.

People in Greene...northern Craighead...southern Lawrence...
northwestern Mississippi and southwestern Dunklin Counties should
monitor this storm closely.

LAT...LON 3619 9031 3591 8997 3578 9104 3588 9103
      3589 9116 3604 9126
TIME...MOT...LOC 0342Z 316DEG 25KT 3613 9033 3604 9090

Local storm report, Mar 9, 9:44 PM CST, 16 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MEMPHIS TN
944 PM CST THU MAR 09 2017

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0940 PM     HAIL             3 N JACKSON             35.68N 88.83W
03/09/2017  E1.75 INCH       MADISON            TN   BROADCAST MEDIA

            FELL ON ASHPORT ROAD.

&&

JAB

Local storm report, Mar 9, 9:45 PM CST, 15 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MEMPHIS TN
945 PM CST THU MAR 09 2017

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0940 PM     HAIL             JACKSON                 35.63N 88.83W
03/09/2017  M1.50 INCH       MADISON            TN   EMERGENCY MNGR

            1 1/2 INCH HAIL ON OLD HUMBOLDT ROAD 1/2 WEST OF HIGHWAY
            45.

&&

MRM

Local storm report, Mar 9, 9:49 PM CST, 11 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MEMPHIS TN
949 PM CST THU MAR 09 2017

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0945 PM     TSTM WND GST     MCKENZIE                36.14N 88.51W
03/09/2017  E0 MPH           CARROLL            TN   TRAINED SPOTTER

            WINDS ESTIMATED 60 TO 70 MPH.

&&

MRM

Local storm report, Mar 9, 9:51 PM CST, 9 minutes before

PRELIMINARY LOCAL STORM REPORT...CORRECTED
NATIONAL WEATHER SERVICE MEMPHIS TN
951 PM CST THU MAR 09 2017

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0945 PM     TSTM WND GST     MCKENZIE                36.14N 88.51W
03/09/2017  E65.00 MPH       CARROLL            TN   TRAINED SPOTTER

            WINDS ESTIMATED 60 TO 70 MPH.

&&

MRM

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 9, 8:00 PM CST	Severe Thunderstorm Warning	MEG	Lake, Obion	45 min
Mar 9, 8:34 PM CST	Severe Thunderstorm Warning	MEG	Dyer, Lake	41 min
Mar 9, 8:45 PM CST	Severe Thunderstorm Warning	MEG	Gibson, Obion, Weakley	45 min
Mar 9, 8:52 PM CST	Severe Thunderstorm Warning	MEG	Obion	23 min
Mar 9, 9:10 PM CST	Severe Thunderstorm Warning	MEG	Henry	50 min
Mar 9, 9:29 PM CST	Severe Thunderstorm Warning	MEG	Carroll, Gibson, Henderson, Madison, Weakley	61 min
Mar 9, 9:32 PM CST	Severe Thunderstorm Warning	MEG	Henderson, Madison	43 min
Mar 9, 9:37 PM CST	Severe Thunderstorm Warning	MEG	Benton	38 min
Mar 9, 9:57 PM CST	Severe Thunderstorm Warning	MEG	Henderson	34 min
Mar 9, 10:06 PM CST	Tornado Warning	MEG	Benton, Carroll, Decatur, Henderson	24 min
Mar 9, 10:07 PM CST	Tornado Warning	MEG	Henderson	21 min
Mar 9, 10:16 PM CST	Severe Thunderstorm Warning	MEG	Lauderdale, Tipton	44 min
Mar 9, 10:19 PM CST	Tornado Warning	MEG	Decatur	26 min
Mar 9, 10:34 PM CST	Severe Thunderstorm Warning	MEG	Chester, Decatur, Hardin, Henderson, McNairy, Madison	41 min
Mar 9, 10:41 PM CST	Flash Flood Warning	MEG	Chester, Crockett, Haywood, Henderson, Madison	3 hr
Mar 9, 11:19 PM CST	Special Weather Statement	MEG	Shelby	26 min
Mar 9, 11:26 PM CST	Severe Thunderstorm Warning	MEG	Shelby	34 min
Mar 9, 11:46 PM CST	Severe Thunderstorm Warning	MEG	Fayette, Shelby	44 min
Mar 10, 3:30 AM CST	Frost Advisory	MEG	Fayette, Hardeman, Hardin, Haywood, Lauderdale, McNairy and 2 more	25 hr
Mar 10, 3:30 AM CST	Freeze Warning	MEG	Benton, Carroll, Chester, Crockett, Decatur, Dyer and 7 more	25 hr
Mar 10, 5:43 AM CST	River Flood Warning	MEG	Crockett, Dyer, Lauderdale	6 hr

Nearby

Severe Thunderstorm Warnings in Tennessee, 2017 Every severe thunderstorm warning in 2017

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.