Alert archive / Mississippi / Tornado Warnings in 2018

Tornado Warning 3, NWS Jackson, MS

February 21, 2018Jefferson Davis County, Lawrence County, Simpson County, Mississippi

NWS Jackson, MS issued this tornado warning at Feb 21, 2018, 7:24 PM CST for Jefferson Davis County, Lawrence County, Simpson County, Mississippi. It was in force for 24 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: Feb 21, 2018, 7:24 PM CST (01:24 UTC)
Expired: Feb 21, 2018, 7:48 PM CST
In force: 24 min
Issued by: NWS Jackson, MS
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.0 in

Counties Jefferson Davis County, MS, Lawrence County, MS, Simpson County, MS

The radar

The Jackson/Brandon,MS radar (KDGX), 58 km from the middle of the area, began a volume at 01:27 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

Slidell Radar S, LA (KSIL), launched 00:00Z, 1.4 hours before the alert went out and 169 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: 1597 J/kg
Mixed-layer CIN: -1 J/kg
Mixed-layer LCL: 685 m above ground
0-6 km bulk shear: 40 kt
0-1 km storm-relative helicity: 158 m²/s²
0-3 km storm-relative helicity: 202 m²/s²
Significant tornado parameter: 1.3
Supercell composite: 8.6

Open this sounding in Storm Lab

The text

As transmitted.

482 
WFUS54 KJAN 220124
TORJAN
MSC065-077-127-220200-
/O.NEW.KJAN.TO.W.0003.180222T0124Z-180222T0200Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Jackson MS
724 PM CST WED FEB 21 2018

The National Weather Service in Jackson has issued a

* Tornado Warning for...
  Southeastern Simpson County in central Mississippi...
  Northeastern Lawrence County in south central Mississippi...
  Northwestern Jefferson Davis County in south central Mississippi...

* Until 800 PM CST
    
* At 724 PM CST, a severe thunderstorm capable of producing a tornado
  was located over Hebron, or 11 miles south of Pinola, moving
  northeast at 30 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...
  Shivers around 735 PM CST. 
  Pinola around 745 PM CST. 

Other locations impacted by this tornadic thunderstorm include New
Hebron.

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 3166 8998 3171 9005 3191 8998 3184 8972
TIME...MOT...LOC 0124Z 208DEG 25KT 3171 8998 

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

$$

BYB

2 follow-up statements

190 
WWUS54 KJAN 220135
SVSJAN

Severe Weather Statement
National Weather Service Jackson MS
735 PM CST WED FEB 21 2018

MSC065-077-220145-
/O.CAN.KJAN.TO.W.0003.000000T0000Z-180222T0200Z/
Lawrence MS-Jefferson Davis MS-
735 PM CST WED FEB 21 2018

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

LAT...LON 3176 9001 3191 8997 3185 8975 3177 8988
TIME...MOT...LOC 0135Z 208DEG 25KT 3178 8994 

$$

MSC127-220200-
/O.CON.KJAN.TO.W.0003.000000T0000Z-180222T0200Z/
Simpson MS-
735 PM CST WED FEB 21 2018

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 800 PM CST FOR
SOUTHEASTERN SIMPSON COUNTY...
    
At 735 PM CST, a severe thunderstorm capable of producing a tornado
was located near Shivers, or near Pinola, moving northeast at 30 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...
  Pinola around 745 PM CST. 

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 3176 9001 3191 8997 3185 8975 3177 8988
TIME...MOT...LOC 0135Z 208DEG 25KT 3178 8994 

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

$$

BYB

047 
WWUS54 KJAN 220148
SVSJAN

Severe Weather Statement
National Weather Service Jackson MS
748 PM CST WED FEB 21 2018

MSC127-220158-
/O.CAN.KJAN.TO.W.0003.000000T0000Z-180222T0200Z/
Simpson MS-
748 PM CST WED FEB 21 2018

...THE TORNADO WARNING FOR SOUTHEASTERN SIMPSON COUNTY 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.

LAT...LON 3176 9001 3191 8997 3185 8975 3177 8988
TIME...MOT...LOC 0147Z 208DEG 25KT 3186 8989 

$$

BYB

The office that day

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

Issued	Product	Office	Counties	Lasted
Feb 21, 6:02 PM CST	Special Weather Statement	JAN	Madison	28 min
Feb 21, 6:25 PM CST	Special Weather Statement	JAN	Madison	35 min
Feb 21, 6:47 PM CST	Special Weather Statement	JAN	Attala	43 min
Feb 21, 7:10 PM CST	Special Weather Statement	JAN	Simpson	50 min
Feb 21, 9:28 PM CST	Flash Flood Warning	JAN	Bolivar, Sunflower, Washington	6 hr
Feb 22, 2:35 AM CST	Special Weather Statement	JAN	Leflore	85 min
Feb 22, 3:30 AM CST	Flash Flood Warning	JAN	Bolivar, Leflore, Sunflower, Washington	5 hr
Feb 22, 7:19 AM CST	Special Weather Statement	JAN	Webster	26 min
Feb 22, 7:32 AM CST	Flash Flood Warning	JAN	Issaquena, Sharkey, Warren	4 hr
Feb 22, 7:39 AM CST	Flash Flood Warning	JAN	Carroll, Grenada, Holmes, Humphreys, Leflore, Montgomery and 3 more	4 hr
Feb 22, 8:28 AM CST	Areal Flood Warning	JAN	Bolivar, Sunflower, Washington	9 hr
Feb 22, 9:16 AM CST	River Flood Warning	JAN	Carroll, Leflore	18 days
Feb 22, 11:42 AM CST	Areal Flood Warning	JAN	Issaquena, Sharkey	6 hr
Feb 22, 11:57 AM CST	Areal Flood Warning	JAN	Carroll, Grenada, Holmes, Humphreys, Leflore, Montgomery and 2 more	6 hr
Feb 22, 2:37 PM CST	River Flood Warning	JAN	Sharkey	26 days
Feb 22, 5:29 PM CST	Areal Flood Warning	JAN	Washington	16 hr

Nearby

Tornado Warnings in Mississippi, 2018 Every tornado warning in 2018 Tornadoes in 2018

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.