Alert archive / Mississippi / Severe Thunderstorm Warnings in 2014

Severe Thunderstorm Warning 21, NWS Jackson, MS

February 20, 2014Marion County, Mississippi

NWS Jackson, MS issued this severe thunderstorm warning at Feb 20, 2014, 8:28 PM CST for Marion County, Mississippi. It was in force for 32 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 20, 2014, 8:28 PM CST (02:28 UTC)
Expired: Feb 20, 2014, 9:00 PM CST
In force: 32 min
Issued by: NWS Jackson, MS
Area: Storm-based polygon

County Marion County, MS

The watch it was issued in

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

Issued	Product	Office	Lasted
Feb 20, 6:05 PM CST	Tornado Watch	SPC	7 hr

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 00:00Z, 2.5 hours before the alert went out and 97 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: 1934 J/kg
Mixed-layer CIN: -3 J/kg
Mixed-layer LCL: 620 m above ground
0-6 km bulk shear: 40 kt
0-1 km storm-relative helicity: 187 m²/s²
0-3 km storm-relative helicity: 183 m²/s²
Significant tornado parameter: 1.7
Supercell composite: 9.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

105 
WUUS54 KJAN 210228
SVRJAN
MSC091-210300-
/O.NEW.KJAN.SV.W.0021.140221T0228Z-140221T0300Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE JACKSON MS
828 PM CST THU FEB 20 2014

THE NATIONAL WEATHER SERVICE IN JACKSON HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHERN MARION COUNTY IN SOUTH CENTRAL MISSISSIPPI...

* UNTIL 900 PM CST

* AT 828 PM CST...A SEVERE THUNDERSTORM WAS LOCATED 6 MILES WEST OF
  PICKWICK...AND MOVING EAST AT 40 MPH.

  HAZARD...60 MPH WIND GUSTS AND QUARTER SIZE HAIL.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  COLUMBIA AROUND 835 PM CST.
  PINEBUR AROUND 840 PM CST.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING AND STAY AWAY FROM WINDOWS.

&&

A TORNADO WATCH REMAINS IN EFFECT UNTIL 100 AM CST FRIDAY MORNING FOR
MISSISSIPPI.

LAT...LON 3107 8985 3107 8992 3108 8993 3112 8994
      3113 8999 3122 9001 3134 8965 3101 8966
      3101 8984
TIME...MOT...LOC 0228Z 258DEG 36KT 3116 8987

$$

GRG

The office that day

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

Issued	Product	Office	Counties	Lasted
Feb 20, 6:05 PM CST	Severe Thunderstorm Warning	JAN	Lincoln	55 min
Feb 20, 6:15 PM CST	Severe Thunderstorm Warning	JAN	Carroll, Grenada, Leflore	45 min
Feb 20, 6:20 PM CST	Severe Thunderstorm Warning	JAN	Clarke	40 min
Feb 20, 6:31 PM CST	Special Weather Statement	JAN	Holmes, Humphreys, Yazoo	29 min
Feb 20, 6:43 PM CST	Special Weather Statement	JAN	Simpson	42 min
Feb 20, 6:45 PM CST	Special Weather Statement	JAN	Montgomery, Webster	30 min
Feb 20, 7:10 PM CST	Special Weather Statement	JAN	Holmes, Yazoo	30 min
Feb 20, 7:12 PM CST	Tornado Warning	JAN	Marion	63 min
Feb 20, 7:34 PM CST	Special Weather Statement	JAN	Attala, Warren, Yazoo	31 min
Feb 20, 7:46 PM CST	Special Weather Statement	JAN	Scott	44 min
Feb 20, 7:46 PM CST	Severe Thunderstorm Warning	JAN	Choctaw, Montgomery, Webster	44 min
Feb 20, 7:54 PM CST	Severe Thunderstorm Warning	JAN	Attala, Choctaw	51 min
Feb 20, 7:58 PM CST	Tornado Warning	JAN	Covington, Jefferson Davis, Lamar, Marion	62 min
Feb 20, 8:08 PM CST	Severe Thunderstorm Warning	JAN	Clay, Lowndes, Oktibbeha	52 min
Feb 20, 8:27 PM CST	Flash Flood Warning	JAN	Marion	3 hr
Feb 20, 8:32 PM CST	Tornado Warning	JAN	Covington, Jones	58 min
Feb 20, 8:39 PM CST	Severe Thunderstorm Warning	JAN	Lowndes	51 min
Feb 20, 8:45 PM CST	Severe Thunderstorm Warning	JAN	Lamar	45 min
Feb 20, 8:52 PM CST	Tornado Warning	JAN	Lowndes	23 min
Feb 20, 9:12 PM CST	Severe Thunderstorm Warning	JAN	Forrest, Jones, Lamar	63 min
Feb 20, 9:22 PM CST	Flash Flood Warning	JAN	Lowndes, Oktibbeha	98 min
Feb 20, 9:26 PM CST	Tornado Warning	JAN	Jones	49 min
Feb 20, 9:34 PM CST	Flash Flood Warning	JAN	Lawrence, Lincoln	116 min
Feb 20, 9:39 PM CST	Flash Flood Warning	JAN	Covington, Forrest, Jones, Lamar	3 hr
Feb 20, 10:03 PM CST	Special Weather Statement	JAN	Rankin	32 min
Feb 20, 10:07 PM CST	Flash Flood Warning	JAN	Jefferson Davis	3 hr
Feb 20, 10:10 PM CST	Severe Thunderstorm Warning	JAN	Jefferson Davis, Marion	50 min
Feb 20, 10:18 PM CST	Severe Thunderstorm Warning	JAN	Forrest, Jones, Lamar	57 min
Feb 20, 10:29 PM CST	Severe Thunderstorm Warning	JAN	Rankin, Scott, Smith	46 min
Feb 20, 10:31 PM CST	Tornado Warning	JAN	Clarke, Jasper	29 min
Feb 20, 10:53 PM CST	Severe Thunderstorm Warning	JAN	Marion	37 min
Feb 20, 11:08 PM CST	Flash Flood Warning	JAN	Marion	3 hr
Feb 20, 11:11 PM CST	Severe Thunderstorm Warning	JAN	Forrest, Lamar	64 min
Feb 20, 11:16 PM CST	Special Weather Statement	JAN	Kemper, Noxubee	29 min
Feb 20, 11:38 PM CST	Areal Flood Warning	JAN	Lawrence, Lincoln	3 hr
Feb 20, 11:39 PM CST	Special Weather Statement	JAN	Lauderdale	31 min
Feb 20, 11:51 PM CST	Flash Flood Warning	JAN	Forrest, Lamar	114 min
Feb 21, 12:31 AM CST	Areal Flood Warning	JAN	Covington, Forrest, Jones, Lamar	3 hr
Feb 21, 1:12 AM CST	Areal Flood Warning	JAN	Jefferson Davis	3 hr
Feb 21, 2:18 AM CST	Areal Flood Warning	JAN	Marion	3 hr

Nearby

Severe Thunderstorm Warnings in Mississippi, 2014 Every severe thunderstorm warning in 2014

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.