Alert archive / Mississippi / Tornado Warnings in 2012

Tornado Warning 29, NWS Jackson, MS

March 21, 2012Jefferson County, Mississippi

NWS Jackson, MS issued this tornado warning at Mar 21, 2012, 10:24 AM CDT for Jefferson County, Mississippi. It was in force for 27 min. 2 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 21, 2012, 10:24 AM CDT (15:24 UTC)
Expired: Mar 21, 2012, 10:51 AM CDT
In force: 27 min
Issued by: NWS Jackson, MS
Area: Storm-based polygon

County Jefferson County, MS

The radar

The Jackson/Brandon,MS radar (KDGX), 116 km from the middle of the area, began a volume at 15:25 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 21, 10:24 AM CDT	TSTM WND DMG	Mcnair, MS	NUMEROUS TREES DOWN ALONG HWY 33 BETWEEN FAYETTE AND THE FRANKLIN COUNTY LINE
Mar 21, 10:30 AM CDT	TSTM WND DMG	Fayette, MS	NUMEROUS TREES DOWN...ONE TREE FELL ON A MOBILE HOME

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

The watch it was issued in

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

Issued	Product	Office	Lasted
Mar 21, 5:04 AM CDT	Tornado Watch	SPC	7 hr
Mar 21, 10:07 AM CDT	Tornado Watch	SPC	8 hr

The nearest sounding before it

Jackson, MS (KJAN), launched 12:00Z, 3.4 hours before the alert went out and 111 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: 143 J/kg
Mixed-layer CIN: -17 J/kg
Mixed-layer LCL: 559 m above ground
0-6 km bulk shear: 42 kt
0-1 km storm-relative helicity: 239 m²/s²
0-3 km storm-relative helicity: 239 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.8

Open this sounding in Storm Lab

The text

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

462 
WFUS54 KJAN 211524
TORJAN
MSC063-211630-
/O.NEW.KJAN.TO.W.0029.120321T1524Z-120321T1630Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE JACKSON MS
1024 AM CDT WED MAR 21 2012

THE NATIONAL WEATHER SERVICE IN JACKSON HAS ISSUED A

* TORNADO WARNING FOR...
  CENTRAL JEFFERSON COUNTY IN SOUTHWEST MISSISSIPPI...

* UNTIL 1130 AM CDT

* AT 1025 AM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO NEAR MCNAIR
  MOVING NORTH AT 50 MPH.

* THE TORNADO WILL BE NEAR...
  FAYETTE BY 1030 AM CDT...
  RED LICK AND LORMAN BY 1035 AM CDT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A TORNADO WARNING MEANS THAT A TORNADO IS OCCURRING OR IMMINENT. YOU
SHOULD ACTIVATE YOUR TORNADO ACTION PLAN AND TAKE PROTECTIVE ACTION
NOW.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 600 PM CDT WEDNESDAY EVENING
FOR NORTHEAST LOUISIANA AND SOUTHERN MISSISSIPPI.

&&

LAT...LON 3161 9116 3164 9116 3180 9110 3187 9107
      3186 9099 3182 9084 3174 9087 3161 9094
TIME...MOT...LOC 1525Z 198DEG 45KT 3165 9103

$$

19

1 follow-up statement

041 
WWUS54 KJAN 211551
SVSJAN

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE JACKSON MS
1051 AM CDT WED MAR 21 2012

MSC063-211601-
/O.CAN.KJAN.TO.W.0029.000000T0000Z-120321T1630Z/
JEFFERSON MS-
1051 AM CDT WED MAR 21 2012

...THE TORNADO WARNING FOR CENTRAL JEFFERSON COUNTY IS CANCELLED...

A TORNADO WATCH REMAINS IN EFFECT UNTIL 600 PM CDT WEDNESDAY EVENING
FOR NORTHEAST LOUISIANA AND SOUTHERN MISSISSIPPI.

LAT...LON 3161 9116 3164 9116 3180 9110 3187 9107
      3186 9099 3182 9084 3174 9087 3161 9094
TIME...MOT...LOC 1551Z 198DEG 45KT 3196 9091

$$

19

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 21, 9:42 AM CDT	Severe Thunderstorm Warning	JAN	Adams	40 min
Mar 21, 10:10 AM CDT	Special Weather Statement	JAN	Jefferson	60 min
Mar 21, 10:18 AM CDT	Severe Thunderstorm Warning	JAN	Franklin, Jefferson	42 min
Mar 21, 10:20 AM CDT	Areal Flood Warning	JAN	Adams	3 hr
Mar 21, 10:29 AM CDT	Tornado Warning	JAN	Claiborne, Jefferson	40 min
Mar 21, 10:35 AM CDT	Severe Thunderstorm Warning	JAN	Franklin, Lincoln	55 min
Mar 21, 10:48 AM CDT	Severe Thunderstorm Warning	JAN	Warren	57 min
Mar 21, 10:55 AM CDT	Tornado Warning	JAN	Claiborne, Warren	33 min
Mar 21, 11:05 AM CDT	Special Weather Statement	JAN	Copiah	45 min
Mar 21, 11:17 AM CDT	Severe Thunderstorm Warning	JAN	Copiah	58 min
Mar 21, 11:25 AM CDT	Special Weather Statement	JAN	Hinds	60 min
Mar 21, 11:32 AM CDT	Severe Thunderstorm Warning	JAN	Issaquena, Sharkey, Yazoo	58 min
Mar 21, 11:34 AM CDT	Special Weather Statement	JAN	Lawrence	31 min
Mar 21, 11:40 AM CDT	Special Weather Statement	JAN	Hinds	60 min
Mar 21, 11:44 AM CDT	Special Weather Statement	JAN	Lincoln	31 min
Mar 21, 12:05 PM CDT	Severe Thunderstorm Warning	JAN	Yazoo	55 min
Mar 21, 12:09 PM CDT	Severe Thunderstorm Warning	JAN	Lawrence	51 min
Mar 21, 12:14 PM CDT	Special Weather Statement	JAN	Forrest	61 min
Mar 21, 12:20 PM CDT	Special Weather Statement	JAN	Madison	60 min
Mar 21, 12:38 PM CDT	Severe Thunderstorm Warning	JAN	Marion	37 min
Mar 21, 12:42 PM CDT	Special Weather Statement	JAN	Rankin	58 min
Mar 21, 12:56 PM CDT	Special Weather Statement	JAN	Yazoo	29 min
Mar 21, 1:10 PM CDT	Severe Thunderstorm Warning	JAN	Covington, Forrest, Jefferson Davis, Lamar, Marion	65 min
Mar 21, 1:18 PM CDT	Special Weather Statement	JAN	Hinds	52 min
Mar 21, 1:26 PM CDT	Special Weather Statement	JAN	Madison	49 min
Mar 21, 1:29 PM CDT	Special Weather Statement	JAN	Simpson, Smith	61 min
Mar 21, 1:55 PM CDT	Special Weather Statement	JAN	Rankin	50 min
Mar 21, 2:05 PM CDT	Tornado Warning	JAN	Rankin	21 min
Mar 21, 2:21 PM CDT	Special Weather Statement	JAN	Scott	59 min
Mar 21, 2:25 PM CDT	Tornado Warning	JAN	Scott	30 min
Mar 21, 2:37 PM CDT	Severe Thunderstorm Warning	JAN	Forrest, Lamar	53 min
Mar 21, 2:47 PM CDT	Tornado Warning	JAN	Forrest, Lamar	16 min
Mar 21, 3:03 PM CDT	River Flood Warning	JAN	Attala, Holmes	8 days
Mar 21, 3:22 PM CDT	Special Weather Statement	JAN	Neshoba, Winston	58 min
Mar 21, 3:28 PM CDT	Tornado Warning	JAN	Forrest, Jones, Lamar	44 min
Mar 21, 3:32 PM CDT	Severe Thunderstorm Warning	JAN	Kemper, Neshoba, Noxubee, Winston	58 min
Mar 21, 4:24 PM CDT	Special Weather Statement	JAN	Clay, Oktibbeha	61 min
Mar 21, 4:45 PM CDT	Special Weather Statement	JAN	Covington	45 min
Mar 21, 5:06 PM CDT	Severe Thunderstorm Warning	JAN	Covington, Jones	39 min
Mar 21, 5:09 PM CDT	Tornado Warning	JAN	Jones	36 min
Mar 21, 5:22 PM CDT	Flash Flood Warning	JAN	Hinds, Madison, Rankin	113 min
Mar 21, 5:34 PM CDT	Tornado Warning	JAN	Jasper	44 min
Mar 21, 6:34 PM CDT	Flash Flood Warning	JAN	Forrest, Lamar	116 min

Nearby

Tornado Warnings in Mississippi, 2012 Every tornado warning in 2012 Tornadoes in 2012

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.