Alert archive / Mississippi / Tornado Warnings in 2017

Tornado Warning 79, NWS Jackson, MS

August 30, 2017Copiah County, Lawrence County, Simpson County, Mississippi

NWS Jackson, MS issued this tornado warning at Aug 30, 2017, 9:10 PM CDT for Copiah County, Lawrence County, Simpson County, Mississippi. 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: Aug 30, 2017, 9:10 PM CDT (02:10 UTC)
Expired: Aug 30, 2017, 9:44 PM CDT
In force: 34 min
Issued by: NWS Jackson, MS
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.0 in

Counties Copiah County, MS, Lawrence County, MS, Simpson County, MS

The radar

The Jackson/Brandon,MS radar (KDGX), 69 km from the middle of the area, began a volume at 02:11 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

Jackson, MS (KJAN), launched 00:00Z, 2.2 hours before the alert went out and 72 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: 1021 J/kg
Mixed-layer CIN: -1 J/kg
Mixed-layer LCL: 543 m above ground
0-6 km bulk shear: 31 kt
0-1 km storm-relative helicity: 209 m²/s²
0-3 km storm-relative helicity: 186 m²/s²
Significant tornado parameter: 1.0
Supercell composite: 8.7

Open this sounding in Storm Lab

The text

As transmitted.

096 
WFUS54 KJAN 310210
TORJAN
MSC029-077-127-310300-
/O.NEW.KJAN.TO.W.0079.170831T0210Z-170831T0300Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Jackson MS
910 PM CDT WED AUG 30 2017

The National Weather Service in Jackson has issued a

* Tornado Warning for...
  Southwestern Simpson County in central Mississippi...
  Northwestern Lawrence County in south central Mississippi...
  Southeastern Copiah County in central Mississippi...

* Until 1000 PM CDT
    
* At 910 PM CDT, a severe thunderstorm capable of producing a tornado
  was located near East Lincoln, or 13 miles east of Brookhaven,
  moving north at 35 mph.

  HAZARD...Tornado. 

  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...
  Sontag and Wanilla around 925 PM CDT. 
  Oma around 935 PM CDT. 
  Rockport around 940 PM CDT. 
  Union around 950 PM CDT. 

Other locations impacted by this tornadic thunderstorm include
Georgetown.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement 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 3148 9024 3171 9024 3172 9025 3192 9019
      3187 9000 3178 9000 3148 9018
TIME...MOT...LOC 0210Z 193DEG 32KT 3153 9023 

TORNADO...RADAR INDICATED
HAIL...0.00IN

$$

DC

3 follow-up statements

749 
WWUS54 KJAN 310224
SVSJAN

Severe Weather Statement
National Weather Service Jackson MS
924 PM CDT WED AUG 30 2017

MSC029-077-127-310300-
/O.CON.KJAN.TO.W.0079.000000T0000Z-170831T0300Z/
Simpson MS-Lawrence MS-Copiah MS-
924 PM CDT WED AUG 30 2017

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 1000 PM CDT FOR
SOUTHWESTERN SIMPSON...NORTHWESTERN LAWRENCE AND SOUTHEASTERN COPIAH
COUNTIES...
    
At 923 PM CDT, a severe thunderstorm capable of producing a tornado
was located over Sontag, or 15 miles east of Brookhaven, moving north
at 35 mph.

HAZARD...Tornado. 

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...
  Oma around 935 PM CDT. 
  Rockport around 940 PM CDT. 
  Union around 955 PM CDT. 

Other locations impacted by this tornadic thunderstorm include
Georgetown.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement 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 3159 9024 3171 9024 3182 9022 3192 9019
      3188 9004 3179 9004 3159 9015
TIME...MOT...LOC 0223Z 193DEG 30KT 3165 9019 

TORNADO...RADAR INDICATED
HAIL...0.00IN

$$

DC

089 
WWUS54 KJAN 310240
SVSJAN

Severe Weather Statement
National Weather Service Jackson MS
940 PM CDT WED AUG 30 2017

MSC077-310248-
/O.CAN.KJAN.TO.W.0079.000000T0000Z-170831T0300Z/
Lawrence MS-
940 PM CDT WED AUG 30 2017

...THE TORNADO WARNING FOR NORTHWESTERN LAWRENCE COUNTY IS
CANCELLED...
    
The tornadic thunderstorm which prompted the warning has moved out 
of the warned area. Therefore, the warning has been cancelled.

LAT...LON 3182 9022 3192 9019 3188 9004 3179 9004
      3176 9006 3175 9012 3176 9013 3175 9014
      3175 9016 3173 9019 3172 9024
TIME...MOT...LOC 0238Z 197DEG 29KT 3177 9014 

$$

MSC029-127-310300-
/O.CON.KJAN.TO.W.0079.000000T0000Z-170831T0300Z/
Simpson MS-Copiah MS-
940 PM CDT WED AUG 30 2017

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 1000 PM CDT FOR
SOUTHWESTERN SIMPSON AND SOUTHEASTERN COPIAH COUNTIES...
    
At 938 PM CDT, a severe thunderstorm capable of producing a tornado
was located over Rockport, or 12 miles southwest of Pinola, moving
north at 35 mph.

HAZARD...Tornado. 

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...
  Union around 955 PM CDT. 

Other locations impacted by this tornadic thunderstorm include
Georgetown.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement 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 3182 9022 3192 9019 3188 9004 3179 9004
      3176 9006 3175 9012 3176 9013 3175 9014
      3175 9016 3173 9019 3172 9024
TIME...MOT...LOC 0238Z 197DEG 29KT 3177 9014 

TORNADO...RADAR INDICATED
HAIL...0.00IN

$$

DC

627 
WWUS54 KJAN 310244
SVSJAN

Severe Weather Statement
National Weather Service Jackson MS
944 PM CDT WED AUG 30 2017

MSC029-127-310253-
/O.CAN.KJAN.TO.W.0079.000000T0000Z-170831T0300Z/
Simpson MS-Copiah MS-
944 PM CDT WED AUG 30 2017

...THE TORNADO WARNING FOR SOUTHWESTERN SIMPSON AND SOUTHEASTERN
COPIAH COUNTIES IS CANCELLED...
                
The storm which prompted the warning has weakened below severe
limits, and no longer appears capable of producing a tornado.
Therefore the warning has been cancelled.  However gusty winds are
still possible with this thunderstorm.

LAT...LON 3182 9022 3192 9019 3188 9004 3179 9004
      3176 9006 3175 9012 3176 9013 3175 9014
      3175 9016 3173 9019 3172 9024
TIME...MOT...LOC 0243Z 193DEG 32KT 3181 9013 

$$

DC

The office that day

Everything else NWS Jackson, MS issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Aug 30, 7:30 PM CDT	Special Weather Statement	JAN	Copiah	30 min
Aug 30, 9:44 PM CDT	Special Weather Statement	JAN	Simpson	31 min
Aug 31, 10:03 AM CDT	Special Weather Statement	JAN	Kemper	27 min
Aug 31, 10:05 AM CDT	Tornado Warning	JAN	Kemper, Neshoba, Winston	25 min
Aug 31, 10:14 AM CDT	Special Weather Statement	JAN	Webster	31 min
Aug 31, 10:27 AM CDT	Tornado Warning	JAN	Noxubee, Winston	33 min
Aug 31, 10:37 AM CDT	Special Weather Statement	JAN	Kemper	23 min
Aug 31, 10:38 AM CDT	Special Weather Statement	JAN	Lowndes	22 min
Aug 31, 10:46 AM CDT	Tornado Warning	JAN	Kemper, Lauderdale	36 min
Aug 31, 10:51 AM CDT	Tornado Warning	JAN	Noxubee, Oktibbeha, Winston	22 min
Aug 31, 12:37 PM CDT	Special Weather Statement	JAN	Noxubee	23 min
Aug 31, 12:59 PM CDT	Special Weather Statement	JAN	Oktibbeha	31 min
Aug 31, 3:36 PM CDT	Special Weather Statement	JAN	Lowndes	39 min
Aug 31, 3:49 PM CDT	Tornado Warning	JAN	Lowndes	41 min
Aug 31, 5:29 PM CDT	Special Weather Statement	JAN	Bolivar, Sunflower, Washington	61 min

Nearby

Tornado Warnings in Mississippi, 2017 Every tornado warning in 2017 Tornadoes 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.