Alert archive / Mississippi / Tornado Warnings in 2018

Tornado Warning 53, NWS Jackson, MS

July 20, 2018Bolivar County, Mississippi

NWS Jackson, MS issued this tornado warning at Jul 20, 2018, 10:31 PM CDT for Bolivar County, Mississippi. It was in force for 45 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: Jul 20, 2018, 10:31 PM CDT (03:31 UTC)
Expired: Jul 20, 2018, 11:16 PM CDT
In force: 45 min
Issued by: NWS Jackson, MS
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 1.0 in

County Bolivar County, MS

The radar

The Little Rock radar (KLZK), 156 km from the middle of the area, began a volume at 03:35 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.

Issued	Product	Office	Lasted
Jul 20, 9:08 PM CDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Little Rock, AR (KBYH), launched 00:00Z, 3.5 hours before the alert went out and 130 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: 3694 J/kg
Mixed-layer CIN: -94 J/kg
Mixed-layer LCL: 1760 m above ground
0-6 km bulk shear: 41 kt
0-1 km storm-relative helicity: 220 m²/s²
0-3 km storm-relative helicity: 407 m²/s²
Significant tornado parameter: 1.2
Supercell composite: 28.4

Open this sounding in Storm Lab

The text

As transmitted.

392 
WFUS54 KJAN 210331
TORJAN
MSC011-210430-
/O.NEW.KJAN.TO.W.0053.180721T0331Z-180721T0430Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Jackson MS
1031 PM CDT FRI JUL 20 2018

The National Weather Service in Jackson has issued a

* Tornado Warning for...
  Eastern Bolivar County in northwestern Mississippi...

* Until 1130 PM CDT.
    
* At 1031 PM CDT, a severe thunderstorm capable of producing a
  tornado was located over White River National Wildlife Refuge,
  moving southeast at 45 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...
  Gunnison and Deeson around 1055 PM CDT.
  Shelby around 1105 PM CDT.
  Mound Bayou around 1110 PM CDT.
  Renova around 1120 PM CDT.
  Cleveland and Boyle around 1125 PM CDT.

Other locations impacted by this tornadic thunderstorm include
Alligator, Winstonville, Duncan, Pace and Merigold.

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 3412 9066 3362 9066 3362 9077 3390 9103
      3393 9101 3396 9109 3398 9108 3398 9105
      3400 9102 3397 9100 3396 9097 3398 9096
      3402 9099 3402 9090 3409 9087 3410 9088
      3409 9092 3412 9095
TIME...MOT...LOC 0331Z 322DEG 38KT 3419 9109 

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

$$

GRG

3 follow-up statements

997 
WWUS54 KJAN 210348
SVSJAN

Severe Weather Statement
National Weather Service Jackson MS
1048 PM CDT FRI JUL 20 2018

MSC011-210430-
/O.CON.KJAN.TO.W.0053.000000T0000Z-180721T0430Z/
Bolivar MS-
1048 PM CDT FRI JUL 20 2018

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 1130 PM CDT FOR EASTERN
BOLIVAR COUNTY...
    
At 1048 PM CDT, a severe thunderstorm capable of producing a tornado
was located near Deeson, or 12 miles southeast of White River
National Wildlife Refuge, moving southeast at 45 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...
  Gunnison and Deeson around 1055 PM CDT.
  Shelby around 1105 PM CDT.
  Mound Bayou around 1110 PM CDT.
  Renova around 1120 PM CDT.
  Cleveland and Boyle around 1125 PM CDT.

Other locations impacted by this tornadic thunderstorm include
Alligator, Winstonville, Duncan, Pace and Merigold.

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 3412 9066 3362 9066 3362 9077 3390 9103
      3393 9101 3396 9109 3398 9108 3398 9105
      3400 9102 3397 9100 3396 9097 3398 9096
      3402 9099 3402 9090 3409 9087 3410 9088
      3409 9092 3412 9095
TIME...MOT...LOC 0348Z 322DEG 38KT 3405 9096 

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

$$

GRG

431 
WWUS54 KJAN 210407
SVSJAN

Severe Weather Statement
National Weather Service Jackson MS
1107 PM CDT FRI JUL 20 2018

MSC011-210430-
/O.CON.KJAN.TO.W.0053.000000T0000Z-180721T0430Z/
Bolivar MS-
1107 PM CDT FRI JUL 20 2018

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 1130 PM CDT FOR EASTERN
BOLIVAR COUNTY...
    
At 1107 PM CDT, a severe thunderstorm capable of producing a tornado
was located over Gunnison, or 8 miles west of Shelby, moving
southeast 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...
  Shelby around 1115 PM CDT.
  Mound Bayou around 1125 PM CDT.
  Cleveland, Renova and Boyle around 1130 PM CDT.

Other locations impacted by this tornadic thunderstorm include
Alligator, Winstonville, Duncan, Pace and Merigold.

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 3412 9066 3362 9066 3362 9077 3390 9103
      3393 9101 3393 9102 3394 9102 3396 9097
      3398 9096 3402 9092 3402 9090 3409 9087
      3410 9088
TIME...MOT...LOC 0407Z 323DEG 30KT 3393 9091 

TORNADO...RADAR INDICATED
HAIL...<.75IN

$$

GRG

359 
WWUS54 KJAN 210416
SVSJAN

Severe Weather Statement
National Weather Service Jackson MS
1116 PM CDT FRI JUL 20 2018

MSC011-210426-
/O.CAN.KJAN.TO.W.0053.000000T0000Z-180721T0430Z/
Bolivar MS-
1116 PM CDT FRI JUL 20 2018

...THE TORNADO WARNING FOR EASTERN BOLIVAR 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.

A Severe Thunderstorm Watch remains in effect until 500 AM CDT for
northwestern Mississippi.

LAT...LON 3412 9066 3362 9066 3362 9077 3390 9103
      3393 9101 3393 9102 3394 9102 3396 9097
      3398 9096 3402 9092 3402 9090 3409 9087
      3410 9088
TIME...MOT...LOC 0414Z 322DEG 38KT 3385 9084 

$$

GRG

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 20, 11:27 PM CDT	Special Weather Statement	JAN	Bolivar, Sunflower	48 min
Jul 20, 11:44 PM CDT	Severe Thunderstorm Warning	JAN	Bolivar	50 min
Jul 21, 12:09 AM CDT	Special Weather Statement	JAN	Leflore	51 min
Jul 21, 12:16 AM CDT	Special Weather Statement	JAN	Sunflower	29 min
Jul 21, 12:39 AM CDT	Special Weather Statement	JAN	Holmes	36 min
Jul 21, 3:45 AM CDT	Special Weather Statement	JAN	Bolivar	45 min
Jul 21, 4:01 AM CDT	Severe Thunderstorm Warning	JAN	Bolivar, Sunflower	59 min
Jul 21, 4:25 AM CDT	Severe Thunderstorm Warning	JAN	Bolivar, Sunflower, Washington	65 min
Jul 21, 4:28 AM CDT	Severe Thunderstorm Warning	JAN	Carroll, Grenada, Leflore	62 min
Jul 21, 4:56 AM CDT	Severe Thunderstorm Warning	JAN	Carroll, Holmes, Humphreys	64 min
Jul 21, 5:23 AM CDT	Severe Thunderstorm Warning	JAN	Madison, Yazoo	56 min
Jul 21, 5:30 AM CDT	Severe Thunderstorm Warning	JAN	Attala, Leake	48 min
Jul 21, 6:02 AM CDT	Severe Thunderstorm Warning	JAN	Hinds, Rankin, Scott	43 min
Jul 21, 2:27 PM CDT	Heat Advisory	JAN	Adams, Claiborne, Copiah, Covington, Forrest, Franklin and 6 more	30 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.