Alert archive / Tennessee / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 28, NWS Memphis, TN

March 1, 2017Shelby County, Tennessee

NWS Memphis, TN issued this severe thunderstorm warning at Mar 1, 2017, 4:41 AM CST for Shelby County, Tennessee. It was in force for 34 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: Mar 1, 2017, 4:41 AM CST (10:41 UTC)
Expired: Mar 1, 2017, 5:15 AM CST
In force: 34 min
Issued by: NWS Memphis, TN
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

County Shelby County, TN

The radar

The Memphis radar (KNQA), 13 km from the middle of the area, began a volume at 10:45 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.

Did it verify

Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this severe thunderstorm warning while it was in force. That is not proof nothing happened: reports are thin where few people live.

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 1, 3:03 AM CST	Tornado Watch	SPC	5 hr

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 00:00Z, 10.7 hours before the alert went out and 321 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: 66 J/kg
Mixed-layer CIN: -155 J/kg
Mixed-layer LCL: 832 m above ground
0-6 km bulk shear: 57 kt
0-1 km storm-relative helicity: 411 m²/s²
0-3 km storm-relative helicity: 386 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.5

Open this sounding in Storm Lab

The text

As transmitted.

092 
WUUS54 KMEG 011041
SVRMEG
TNC157-011130-
/O.NEW.KMEG.SV.W.0028.170301T1041Z-170301T1130Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Memphis TN
441 AM CST WED MAR 1 2017

The National Weather Service in Memphis has issued a

* Severe Thunderstorm Warning for...
  Northern Shelby County in west Tennessee...

* Until 530 AM CST

* At 440 AM CST, severe thunderstorms were located along a line
  extending from near Jennette to near Munford, moving southeast at
  30 mph.

  HAZARD...60 mph wind gusts. 

  SOURCE...Radar indicated. 

  IMPACT...Expect damage to roofs, siding, and trees. 

* Locations impacted include...
  Bartlett, Millington, Meeman Shelby Forest State Park, Memphis,
  Lakeland, Ellendale, Downtown Memphis, Frayser, Barretville,
  Griffin Corner, Woodstock, Redwood, Rosemark, Locke, Sloanville,
  Elmore Park, Brunswick, Raleigh, Gilestown and Spring Lake.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A tornado watch remains in effect for the warned area. Tornadoes can
develop quickly from severe thunderstorms. Although a tornado is not
immediately likely, if one is spotted, act quickly and move to a
place of safety inside a sturdy structure such as a storm shelter or
small interior room.

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

These storms are producing destructive winds. SEEK SHELTER NOW 
inside a sturdy structure and stay away from windows! 
&&

A tornado watch remains in effect until 800 AM CST for eastern
Arkansas...and western and west Tennessee.

LAT...LON 3531 9011 3535 9011 3538 9007 3540 9004
      3540 9001 3538 8978 3540 8977 3541 8973
      3538 8969 3517 8978 3512 9008 3514 9006
      3517 9011 3521 9007 3523 9008 3525 9011
      3525 9014 3528 9017
TIME...MOT...LOC 1040Z 302DEG 27KT 3513 9050 3548 8987 

HAIL...<.75IN
WIND...60MPH
 
$$

1 follow-up statement

886 
WWUS54 KMEG 011115
SVSMEG

Severe Weather Statement
National Weather Service Memphis TN
515 AM CST WED MAR 1 2017

TNC157-011125-
/O.CAN.KMEG.SV.W.0028.000000T0000Z-170301T1130Z/
Shelby TN-
515 AM CST WED MAR 1 2017

...THE SEVERE THUNDERSTORM WARNING FOR NORTHERN SHELBY COUNTY IS
CANCELLED...
            
The storms which prompted the warning have weakened below severe
limits, and no longer pose an immediate threat to life or property.
Therefore, the warning has been cancelled.  However gusty winds are
still possible with these thunderstorms.

A tornado watch remains in effect until 800 AM CST for eastern
Arkansas...and western and west Tennessee.

LAT...LON 3531 9011 3535 9011 3538 9007 3540 9004
      3540 9001 3538 8978 3540 8977 3541 8973
      3538 8969 3517 8978 3512 9008 3514 9006
      3517 9011 3521 9007 3523 9008 3525 9011
      3525 9014 3528 9017
TIME...MOT...LOC 1114Z 302DEG 27KT 3499 9023 3534 8960 

$$

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 1, 2:41 AM CST, 2 hours earlier.

Area forecast discussion, Mar 1, 2:41 AM CST, 2 hours before

Area Forecast Discussion
National Weather Service Memphis TN
241 AM CST Wed Mar 1 2017

.DISCUSSION...

Skies are cloudy across the forecast area early this morning with
temperatures ranging from the upper 60s to lower 70s. A cold front
currently extends from northeast Illinois through northwest
Arkansas and into central Texas. Some areas of thunderstorms have
developed ahead of the front with some thunderstorms currently
over north central into western Arkansas. Some of these
thunderstorms have been severe and a new Tornado Watch which
should cover most of the forecast area should be issued before 4
AM. As the cold front moves east today thunderstorms will move
through the forecast area. Damaging winds and large hail will be
the main threats but tornadoes are also possible. Most of the
thunderstorms should be out of the forecast area by this
afternoon. Temperatures will remain on the warm side today with
highs from the upper 60s to mid 70s.

The cold front will be east of the region tonight with high
pressure moving into the central plains. Cooler and drier air will
move into region with lows Thursday morning in the mid to upper
30s. Thursday will be a sunny day as the surface high settles into
Oklahoma. Temperatures will be close to normal levels with highs
in the upper 50s to lower 60s. The surface high will be close to
the forecast area Thursday night which will allow temperatures to
drop a little lower than tonight. Lows Friday morning will be in
the low to mid 30s. Friday will be the coolest day of the forecast
period as the high remains just west of the area. Highs on Friday
will be in the low to mid 50s.

By Friday night, the surface high will be east of the region which
will allow winds to shift to the south. This will bring milder air
back into the region so temperatures will not be as chilly
Saturday morning. The warming trend will continue for much of the
weekend as temperatures return to above normal levels. Moisture
will start to return to southern sections of the forecast area by
Sunday with some isolated showers possible.

The chance of rain will increase some on Sunday night as another
cold front will move into the plains. This cold front will move
quickly into Arkansas by Monday morning and through the forecast
area Monday night. This will mean showers and thunderstorms are
expected to develop ahead of the front and move through the region
both Monday and Monday night. The cold front should be just south
of the forecast area on Tuesday with some additional thunderstorms
possible. Temperatures should remain above normal for Monday and
Tuesday.

ARS

&&

.AVIATION... 06z TAFs

VFR weather outside of convection...with model guidance indicating
a slower passage of the approaching cold front. Adjusted timing
accordingly. Gusty south to southwest winds will continue
overnight...then veering west and northwest after passage. Winds
will diminish significantly by sunset. Low level wind shear
potential through the first 6-8 hours of the period. Worst cigs
expected at TUP. Expect stronger wind gusts in convection.

JAB

&&

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

Hazardous weather outlook, Mar 1, 3:14 AM CST, 1 hour 27 minutes before

Hazardous Weather Outlook
National Weather Service Memphis TN
314 AM CST Wed Mar 1 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>092-021115-
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-
314 AM CST Wed Mar 1 2017

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 an enhanced risk for severe thunderstorms this morning
across all of west Tennessee and for much of north Mississippi. A
slight risk for severe thunderstorms will exist for the remainder
of the Mid-South. The primary severe weather threats will include
damaging winds and large hail although a few tornadoes are
possible.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday

North Mississippi and west Tennessee will likely experience
elevated levels of wild fire danger Thursday and Friday, due to
low relative humidity levels.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will be needed this morning.

In the hours before

Local storm report, Mar 1, 4:11 AM CST, 30 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MEMPHIS TN
411 AM CST WED MAR 01 2017

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

0345 AM     TSTM WND GST     2 N WEINER              35.65N 90.90W
03/01/2017  M59 MPH          POINSETT           AR   PUBLIC

            MEASURED ON A WEATHER STATION

&&

ARS

Local storm report, Mar 1, 4:12 AM CST, 29 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MEMPHIS TN
412 AM CST WED MAR 01 2017

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

0320 AM     TSTM WND DMG     IMBODEN                 36.20N 91.18W
03/01/2017                   LAWRENCE           AR   PUBLIC

            A U-HAUL TRAILER WAS BLOWN DOWN

&&

ARS

Local storm report, Mar 1, 4:32 AM CST, 9 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MEMPHIS TN
432 AM CST WED MAR 01 2017

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

0355 AM     NON-TSTM WND DMG 4 NW BAY                35.78N 90.60W
03/01/2017                   CRAIGHEAD          AR   BROADCAST MEDIA

            TWO 18 WHEELERS WERE BLOWN OVER...ONE IN EACH LANE ON
            INTERSTATE 555 BETWEEN JONESBORO AND BAY.

&&

JOHNSON

Local storm report, Mar 1, 4:36 AM CST, 5 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MEMPHIS TN
436 AM CST WED MAR 01 2017

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

0425 AM     TSTM WND GST     MALDEN                  36.60N 89.99W
03/01/2017  M61 MPH          DUNKLIN            MO   AWOS

&&

JOHNSON

Local storm report, Mar 1, 4:37 AM CST, 4 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MEMPHIS TN
437 AM CST WED MAR 01 2017

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

0355 AM     TSTM WND GST     CORNING                 36.41N 90.59W
03/01/2017  M58.00 MPH       CLAY               AR   AWOS

            WIND GUST MEASURED AT CORNING AIRPORT

&&

JOHNSON

Local storm report, Mar 1, 4:41 AM CST, 0 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MEMPHIS TN
441 AM CST WED MAR 01 2017

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

0335 AM     TSTM WND DMG     WALNUT RIDGE            36.07N 90.96W
03/01/2017                   LAWRENCE           AR   PUBLIC

            TREES AND POWER LINES DOWN AT WILLIAMS BAPTIST COLLEGE

&&

ARS

The office that day

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

Issued	Product	Office	Counties	Lasted
Feb 28, 10:17 PM CST	Severe Thunderstorm Warning	MEG	Obion, Weakley	28 min
Feb 28, 10:22 PM CST	Tornado Warning	MEG	Obion, Weakley	23 min
Mar 1, 4:24 AM CST	Tornado Warning	MEG	Dyer, Lauderdale, Tipton	51 min
Mar 1, 4:36 AM CST	Severe Thunderstorm Warning	MEG	Lake, Obion	39 min
Mar 1, 4:43 AM CST	Tornado Warning	MEG	Crockett, Dyer, Gibson, Haywood, Lauderdale, Tipton	47 min
Mar 1, 5:07 AM CST	Severe Thunderstorm Warning	MEG	Carroll, Crockett, Gibson, Haywood, Madison, Weakley	38 min
Mar 1, 5:24 AM CST	Severe Thunderstorm Warning	MEG	Benton, Carroll, Decatur, Henderson, Henry	51 min
Mar 1, 6:42 AM CST	Special Weather Statement	MEG	Fayette	33 min
Mar 1, 6:53 AM CST	Severe Thunderstorm Warning	MEG	Fayette, Hardeman	34 min
Mar 1, 6:54 AM CST	Severe Thunderstorm Warning	MEG	Shelby	22 min
Mar 1, 7:11 AM CST	Severe Thunderstorm Warning	MEG	Fayette, Haywood, Tipton	14 min
Mar 1, 7:20 AM CST	Severe Thunderstorm Warning	MEG	Chester, McNairy	28 min
Mar 1, 8:47 AM CST	Special Weather Statement	MEG	Fayette	13 min
Mar 1, 9:21 AM CST	Special Weather Statement	MEG	Hardin	24 min
Mar 1, 10:10 AM CST	Severe Thunderstorm Warning	MEG	Hardin	35 min

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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.