Alert archive / Arkansas / Tornado Warnings in 2016

Tornado Warning 21, NWS Memphis, TN

December 17, 2016Clay County, Greene County, Arkansas; Dunklin County, Missouri

NWS Memphis, TN issued this tornado warning at Dec 17, 2016, 4:34 PM CST for Clay County, Greene County, Arkansas; Dunklin County, Missouri. It was in force for 26 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 17, 2016, 4:34 PM CST (22:34 UTC)
Expired
Dec 17, 2016, 5:00 PM CST
In force
26 min
Issued by
NWS Memphis, TN
Area
Storm-based polygon
Tornado
Radar indicated
Hail
1.0 in

Counties Clay County, AR, Greene County, AR, Dunklin County, MO

The radar

The Memphis radar (KNQA), 94 km from the middle of the area, began a volume at 22:37 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 watch it was issued in

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

IssuedProductOfficeLasted
Dec 17, 1:42 PM CSTTornado WatchSPC7 hr

The nearest sounding before it

Little Rock, AR (KBYH), launched 12:00Z, 10.6 hours before the alert went out and 150 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 2016-12-17Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 200 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Little Rock, AR at 12:00Z on 2016-12-17The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 320 square meters per square second.1939587897117136Sfc1 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
200 J/kg
Mixed-layer CIN
-240 J/kg
Mixed-layer LCL
834 m above ground
0-6 km bulk shear
56 kt
0-1 km storm-relative helicity
320 m²/s²
0-3 km storm-relative helicity
327 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.2

Open this sounding in Storm Lab

The text

As transmitted.

855 
WFUS54 KMEG 172234
TORMEG
ARC021-055-MOC069-172300-
/O.NEW.KMEG.TO.W.0021.161217T2234Z-161217T2300Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Memphis TN
434 PM CST SAT DEC 17 2016

The National Weather Service in Memphis has issued a

* Tornado Warning for...
  Southeastern Clay County in eastern Arkansas...
  East central Greene County in eastern Arkansas...
  Southern Dunklin County in southeastern Missouri...

* Until 500 PM CST
    
* At 434 PM CST, a severe thunderstorm producing a tornado was
  located near Senath, moving northeast at 55 mph.

  HAZARD...Tornado and quarter size hail. 

  SOURCE...Radar indicated rotation. 

  IMPACT...Flying debris will be dangerous to those caught without 
           shelter. Mobile homes will be damaged or destroyed. 
           Damage to roofs, windows, and vehicles will occur.  Tree 
           damage is likely. 

* This dangerous storm will be near...
  Kennett around 450 PM CST. 

Other locations impacted by this tornadic thunderstorm include Fritz,
Deer Land, Lorine, Caruth, Hollywood, West Kennett, Dillman, Octa,
Holly Island and Scobeville.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a storm shelter or an interior room on the
lowest floor of a sturdy building. Avoid windows. If you are
outdoors, in a mobile home, or in a vehicle, move to the closest
substantial shelter and protect yourself from flying debris.

&&

LAT...LON 3635 8996 3611 8996 3599 9031 3600 9032
      3620 9032
TIME...MOT...LOC 2234Z 246DEG 49KT 3614 9024 

TORNADO...RADAR INDICATED
HAIL...1.00IN

$$
1 follow-up statement
295 
WWUS54 KMEG 172240
SVSMEG

Severe Weather Statement
National Weather Service Memphis TN
440 PM CST SAT DEC 17 2016

ARC021-055-172250-
/O.CAN.KMEG.TO.W.0021.000000T0000Z-161217T2300Z/
Clay AR-Greene AR-
440 PM CST SAT DEC 17 2016

...THE TORNADO WARNING FOR SOUTHEASTERN CLAY AND EAST CENTRAL GREENE
COUNTIES IS CANCELLED...
    
The tornadic thunderstorm which prompted the warning has moved out
of the warned area. Therefore, the warning has been cancelled.

A tornado watch remains in effect until 900 PM CST for eastern
Arkansas...and southeastern Missouri.

LAT...LON 3635 8996 3618 8996 3609 9016 3608 9022
      3613 9026 3614 9024 3616 9024 3618 9022
      3618 9021 3620 9020 3623 9013 3626 9012
      3628 9008 3631 9006
TIME...MOT...LOC 2240Z 246DEG 49KT 3618 9014 

$$

MOC069-172300-
/O.CON.KMEG.TO.W.0021.000000T0000Z-161217T2300Z/
Dunklin MO-
440 PM CST SAT DEC 17 2016

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 500 PM CST FOR
SOUTHEASTERN DUNKLIN COUNTY...
    
At 440 PM CST, a severe thunderstorm producing a tornado was located
near Senath, moving northeast at 55 mph.

HAZARD...Tornado and quarter size hail. 

SOURCE...Radar indicated rotation. 

IMPACT...Flying debris will be dangerous to those caught without 
         shelter. Mobile homes will be damaged or destroyed. Damage 
         to roofs, windows, and vehicles will occur.  Tree damage is 
         likely. 

This dangerous storm will be near...
  Kennett around 450 PM CST. 

Other locations impacted by this tornadic thunderstorm include Deer
Land, West Kennett, Dillman, Octa, Lorine, Scobeville, Caruth, Ipley,
Vincit and Noland.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a storm shelter or an interior room on the
lowest floor of a sturdy building. Avoid windows. If you are
outdoors, in a mobile home, or in a vehicle, move to the closest
substantial shelter and protect yourself from flying debris.

&&

LAT...LON 3635 8996 3618 8996 3609 9016 3608 9022
      3613 9026 3614 9024 3616 9024 3618 9022
      3618 9021 3620 9020 3623 9013 3626 9012
      3628 9008 3631 9006
TIME...MOT...LOC 2240Z 246DEG 49KT 3618 9014 

TORNADO...RADAR INDICATED
HAIL...1.00IN

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Dec 17, 12:16 PM CSTWinter Weather AdvisoryMEGClay, Craighead, Crittenden, Cross, Greene, Lawrence and 4 more18 hr
Dec 17, 2:21 PM CSTSevere Thunderstorm WarningMEGClay39 min
Dec 17, 2:30 PM CSTSpecial Weather StatementMEGGreene30 min
Dec 17, 2:43 PM CSTSevere Thunderstorm WarningMEGClay, Greene32 min
Dec 17, 3:45 PM CSTSpecial Weather StatementMEGGreene30 min
Dec 17, 4:05 PM CSTSpecial Weather StatementMEGGreene40 min
Dec 17, 4:27 PM CSTSevere Thunderstorm WarningMEGClay, Greene48 min
Dec 17, 4:38 PM CSTFlash Flood WarningMEGGreene3 hr
Dec 17, 4:39 PM CSTSevere Thunderstorm WarningMEGCraighead, Poinsett51 min
Dec 17, 5:06 PM CSTSevere Thunderstorm WarningMEGCraighead, Mississippi, Poinsett24 min
Dec 17, 5:19 PM CSTTornado WarningMEGCraighead, Mississippi, Poinsett26 min
Dec 17, 5:27 PM CSTSevere Thunderstorm WarningMEGCraighead, Mississippi, Poinsett48 min
Dec 17, 5:51 PM CSTSevere Thunderstorm WarningMEGMississippi39 min
Dec 17, 2:04 PM CSTSpecial Weather StatementMEGDunklin26 min
Dec 17, 2:51 PM CSTSevere Thunderstorm WarningMEGPemiscot24 min
Dec 17, 3:13 PM CSTSpecial Weather StatementMEGDunklin32 min
Dec 17, 3:25 PM CSTSevere Thunderstorm WarningMEGDunklin7 min
Dec 17, 4:45 PM CSTTornado Warning Tornado observedMEGPemiscot23 min
Dec 17, 5:04 PM CSTSevere Thunderstorm WarningMEGPemiscot41 min

Nearby

Tornado Warnings in Arkansas, 2016Tornado Warnings in Missouri, 2016Every tornado warning in 2016Tornadoes in 2016

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.