Alert archive / Mississippi / Severe Thunderstorm Warnings in 2018

Severe Thunderstorm Warning 21, NWS Jackson, MS

March 5, 20185 counties in Mississippi

NWS Jackson, MS issued this severe thunderstorm warning at Mar 5, 2018, 6:27 PM CST for 5 counties in Mississippi. It was in force for 37 min. 3 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Mar 5, 2018, 6:27 PM CST (00:27 UTC)
Expired: Mar 5, 2018, 7:04 PM CST
In force: 37 min
Issued by: NWS Jackson, MS
Area: Storm-based polygon
Hail: 1.25 in
Wind: 60.0 mph

Counties Attala County, MS, Carroll County, MS, Choctaw County, MS, Montgomery County, MS, Webster County, MS

The radar

The Columbus AFB radar (KGWX), 110 km from the middle of the area, began a volume at 00:26 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.

What was reported inside it

Time	Report	Where	Remark
Mar 5, 6:32 PM CST	HAIL 1	2 W Winona, MS	MOSTLY SMALL HAIL, BUT SOME UP TO QUARTER SIZE.
Mar 5, 6:34 PM CST	TSTM WND DMG	1 Nw Winona, MS	AN 18 WHEELER WENT OFF A ROAD AND INTO A RAVINE ALONG US HIGHWAY 82 NEAR HIGHWAY 51.
Mar 5, 6:37 PM CST	TSTM WND DMG	4 Sse Winona, MS	TREE WAS BLOWN DOWN NEAR THE INTERSECTION OF OLDHAM ROAD AND HIGHWAY 407.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Jackson, MS (KJAN), launched 00:00Z, 0.5 hours before the alert went out and 133 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: 253 J/kg
Mixed-layer CIN: -12 J/kg
Mixed-layer LCL: 1443 m above ground
0-6 km bulk shear: 46 kt
0-1 km storm-relative helicity: 80 m²/s²
0-3 km storm-relative helicity: 134 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 0.8

Open this sounding in Storm Lab

The text

As transmitted.

739 
WUUS54 KJAN 060027
SVRJAN
MSC007-015-019-097-155-060145-
/O.NEW.KJAN.SV.W.0021.180306T0027Z-180306T0145Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Jackson MS
627 PM CST MON MAR 5 2018

The National Weather Service in Jackson has issued a

* Severe Thunderstorm Warning for...
  Choctaw County in central Mississippi...
  Northeastern Carroll County in north central Mississippi...
  Northeastern Attala County in central Mississippi...
  Southwestern Webster County in north central Mississippi...
  Montgomery County in north central Mississippi...

* Until 745 PM CST

* At 626 PM CST, a severe thunderstorm was located near Winona,
  moving east at 40 mph.

  HAZARD...60 mph wind gusts and half dollar size hail. 

  SOURCE...Radar indicated. 

  IMPACT...Hail damage to vehicles is expected. Expect wind damage 
           to roofs, siding, and trees. 

* This severe thunderstorm will be near...
  Winona around 635 PM CST. 
  Kilmichael around 650 PM CST. 
  Poplar Creek around 655 PM CST. 
  Chester around 720 PM CST. 
  Ackerman around 730 PM CST. 

Other locations impacted by this severe thunderstorm include French
Camp, Mccool and Weir.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3348 8909 3329 8909 3328 8911 3320 8911
      3320 8921 3311 8922 3311 8924 3343 8992
      3360 8980
TIME...MOT...LOC 0026Z 291DEG 33KT 3349 8982 

HAIL...1.25IN
WIND...60MPH
 
$$

DB

2 follow-up statements

829 
WWUS54 KJAN 060044
SVSJAN

Severe Weather Statement
National Weather Service Jackson MS
644 PM CST MON MAR 5 2018

MSC015-060053-
/O.CAN.KJAN.SV.W.0021.000000T0000Z-180306T0145Z/
Carroll MS-
644 PM CST MON MAR 5 2018

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN CARROLL COUNTY IS
CANCELLED...
    
The severe thunderstorm which prompted the warning has moved out of 
the warned area. Therefore, the warning has been cancelled.

LAT...LON 3345 8909 3329 8909 3328 8911 3320 8911
      3320 8921 3311 8922 3311 8924 3336 8965
      3340 8965 3340 8970 3343 8975 3354 8964
TIME...MOT...LOC 0043Z 291DEG 33KT 3343 8964 

$$

MSC007-019-097-155-060145-
/O.CON.KJAN.SV.W.0021.000000T0000Z-180306T0145Z/
Choctaw MS-Attala MS-Webster MS-Montgomery MS-
644 PM CST MON MAR 5 2018

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 745 PM CST
FOR CHOCTAW...NORTHEASTERN ATTALA...SOUTHWESTERN WEBSTER AND SOUTHERN
MONTGOMERY COUNTIES...

At 643 PM CST, a severe thunderstorm was located near Kilmichael, or
near Winona, moving east at 40 mph.

HAZARD...60 mph wind gusts and quarter size hail. 

SOURCE...Radar indicated. 

IMPACT...Hail damage to vehicles is expected. Expect wind damage to 
         roofs, siding, and trees. 

This severe storm will be near...
  Poplar Creek around 655 PM CST. 
  Chester around 720 PM CST. 
  Ackerman around 730 PM CST. 

Other locations impacted by this severe thunderstorm include French
Camp, Mccool and Weir.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3345 8909 3329 8909 3328 8911 3320 8911
      3320 8921 3311 8922 3311 8924 3336 8965
      3340 8965 3340 8970 3343 8975 3354 8964
TIME...MOT...LOC 0043Z 291DEG 33KT 3343 8964 

HAIL...1.00IN
WIND...60MPH
 
$$

DB

561 
WWUS54 KJAN 060104
SVSJAN

Severe Weather Statement
National Weather Service Jackson MS
704 PM CST MON MAR 5 2018

MSC007-019-097-155-060114-
/O.CAN.KJAN.SV.W.0021.000000T0000Z-180306T0145Z/
Choctaw MS-Attala MS-Webster MS-Montgomery MS-
704 PM CST MON MAR 5 2018

...THE SEVERE THUNDERSTORM WARNING FOR CHOCTAW...NORTHEASTERN
ATTALA...SOUTHWESTERN WEBSTER AND SOUTHERN MONTGOMERY COUNTIES IS
CANCELLED...
                
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore the warning has been cancelled.  However gusty winds and
heavy rain are still possible with this thunderstorm.

LAT...LON 3345 8909 3329 8909 3328 8911 3320 8911
      3320 8921 3311 8922 3311 8924 3336 8965
      3340 8965 3340 8970 3343 8975 3354 8964
TIME...MOT...LOC 0102Z 291DEG 33KT 3336 8942 

$$

DB

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 5, 6:29 PM CST	Severe Thunderstorm Warning	JAN	Issaquena, Warren	61 min
Mar 5, 7:10 PM CST	Tornado Warning	JAN	Hinds, Madison, Warren	21 min
Mar 5, 7:41 PM CST	Special Weather Statement	JAN	Oktibbeha	34 min
Mar 5, 8:35 PM CST	Special Weather Statement	JAN	Rankin	40 min
Mar 5, 8:55 PM CST	Special Weather Statement	JAN	Warren	50 min
Mar 5, 9:36 PM CST	Special Weather Statement	JAN	Smith	54 min
Mar 5, 9:49 PM CST	Flash Flood Warning	JAN	Hinds	116 min

Nearby

Severe Thunderstorm Warnings in Mississippi, 2018 Every severe thunderstorm warning 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.