Alert archive / Mississippi / Tornado Warnings in 2012

Tornado Warning 54, NWS Jackson, MS

August 30, 2012Clarke County, Mississippi

NWS Jackson, MS issued this tornado warning at Aug 30, 2012, 7:37 AM CDT for Clarke County, Mississippi. It was in force for 29 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: Aug 30, 2012, 7:37 AM CDT (12:37 UTC)
Expired: Aug 30, 2012, 8:06 AM CDT
In force: 29 min
Issued by: NWS Jackson, MS
Area: Storm-based polygon

County Clarke County, MS

The radar

The Jackson/Brandon,MS radar (KDGX), 137 km from the middle of the area, began a volume at 12:38 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
Aug 29, 11:42 PM CDT	Tornado Watch	SPC	8 hr
Aug 30, 7:13 AM CDT	Tornado Watch	SPC	9 hr

The nearest sounding before it

Jackson, MS (KJAN), launched 12:00Z, 0.6 hours before the alert went out and 147 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: 107 J/kg
Mixed-layer CIN: -5 J/kg
Mixed-layer LCL: 501 m above ground
0-6 km bulk shear: 48 kt
0-1 km storm-relative helicity: 473 m²/s²
0-3 km storm-relative helicity: 650 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.

795 
WFUS54 KJAN 301237
TORJAN
MSC023-301330-
/O.NEW.KJAN.TO.W.0054.120830T1237Z-120830T1330Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE JACKSON MS
737 AM CDT THU AUG 30 2012

THE NATIONAL WEATHER SERVICE IN JACKSON HAS ISSUED A

* TORNADO WARNING FOR...
  CLARKE COUNTY IN EAST CENTRAL MISSISSIPPI...
  THIS INCLUDES THE CITY OF QUITMAN...

* UNTIL 830 AM CDT

* AT 737 AM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO 15 MILES SOUTH
  OF CRANDALL MOVING NORTH AT 50 MPH.

* THE TORNADO WILL BE NEAR...
  CRANDALL BY 750 AM CDT...
  DE SOTO BY 755 AM CDT...
  QUITMAN BY 800 AM CDT...
  SYKES BY 805 AM CDT...
  MIDDLETON...SNELL AND STONEWALL BY 810 AM CDT...
  SABLE BY 815 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.

HEAVY RAINFALL MAY OBSCURE THIS TORNADO. TAKE COVER NOW! IF YOU WAIT
TO SEE OR HEAR IT COMING...IT MAY BE TOO LATE TO GET TO A SAFE PLACE.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 800 AM CDT THURSDAY MORNING
FOR SOUTHERN MISSISSIPPI. A TORNADO WATCH ALSO REMAINS IN EFFECT
UNTIL 400 PM CDT THURSDAY AFTERNOON FOR EASTERN MISSISSIPPI.

&&

LAT...LON 3189 8847 3189 8848 3186 8858 3185 8863
      3184 8873 3222 8884 3222 8843
TIME...MOT...LOC 1237Z 168DEG 42KT 3179 8854

$$

MRM

1 follow-up statement

474 
WWUS54 KJAN 301306
SVSJAN

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE JACKSON MS
806 AM CDT THU AUG 30 2012

MSC023-301316-
/O.CAN.KJAN.TO.W.0054.000000T0000Z-120830T1330Z/
CLARKE MS-
806 AM CDT THU AUG 30 2012

...THE TORNADO WARNING FOR CLARKE COUNTY IS CANCELLED...

A TORNADO WATCH REMAINS IN EFFECT UNTIL 400 PM CDT THURSDAY AFTERNOON
FOR EASTERN MISSISSIPPI.

LAT...LON 3189 8847 3189 8848 3186 8858 3185 8863
      3184 8873 3222 8884 3222 8843
TIME...MOT...LOC 1306Z 168DEG 42KT 3212 8862

$$

BK

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 29, 8:06 PM CDT	Special Weather Statement	JAN	Covington, Forrest, Jefferson Davis, Lamar, Lawrence, Lincoln and 1 more	54 min
Aug 29, 9:28 PM CDT	Flash Flood Warning	JAN	Covington, Forrest, Jones, Lamar	6 hr
Aug 29, 9:35 PM CDT	Flash Flood Warning	JAN	Jefferson Davis, Lawrence, Lincoln, Marion	6 hr
Aug 29, 10:15 PM CDT	Flash Flood Warning	JAN	Jefferson Davis, Lawrence, Lincoln, Marion	5 hr
Aug 29, 11:13 PM CDT	Special Weather Statement	JAN	Copiah, Hinds, Jasper, Jones, Rankin, Simpson and 1 more	57 min
Aug 30, 12:23 AM CDT	Flash Flood Warning	JAN	Jasper, Smith	6 hr
Aug 30, 2:05 AM CDT	Flash Flood Warning	JAN	Copiah, Simpson	6 hr
Aug 30, 2:10 AM CDT	River Flood Warning	JAN	Jones	6 days
Aug 30, 2:52 AM CDT	Flash Flood Warning	JAN	Clarke	6 hr
Aug 30, 2:55 AM CDT	Tornado Warning	JAN	Clarke, Jasper	29 min
Aug 30, 3:21 AM CDT	Flash Flood Warning Emergency	JAN	Covington, Forrest, Jones, Lamar	6 hr
Aug 30, 3:23 AM CDT	Flash Flood Warning	JAN	Jefferson Davis, Lawrence, Marion	112 min
Aug 30, 3:29 AM CDT	Flash Flood Warning	JAN	Franklin, Lincoln	6 hr
Aug 30, 5:06 AM CDT	Tornado Warning	JAN	Clarke, Lauderdale	24 min
Aug 30, 5:07 AM CDT	Flash Flood Warning	JAN	Jefferson Davis, Lamar, Lawrence, Marion	4 hr
Aug 30, 5:45 AM CDT	Tornado Warning	JAN	Clarke, Lauderdale	45 min
Aug 30, 6:40 AM CDT	Tornado Warning	JAN	Neshoba, Newton	23 min
Aug 30, 6:52 AM CDT	Tornado Warning	JAN	Clarke, Lauderdale	53 min
Aug 30, 7:21 AM CDT	Flash Flood Warning	JAN	Lauderdale, Newton	6 hr
Aug 30, 7:35 AM CDT	Flash Flood Warning	JAN	Hinds, Rankin	6 hr
Aug 30, 7:41 AM CDT	Tornado Warning	JAN	Kemper, Lauderdale, Neshoba, Newton	27 min
Aug 30, 8:09 AM CDT	Flash Flood Warning	JAN	Copiah, Simpson	5 hr
Aug 30, 8:29 AM CDT	Tornado Warning	JAN	Clarke	46 min
Aug 30, 8:37 AM CDT	Flash Flood Warning	JAN	Clarke	5 hr
Aug 30, 8:57 AM CDT	Flash Flood Warning	JAN	Lamar, Marion	4 hr
Aug 30, 9:10 AM CDT	Tornado Warning	JAN	Covington, Forrest, Jones, Lamar	36 min
Aug 30, 9:14 AM CDT	Flash Flood Warning	JAN	Covington, Jefferson Davis, Lawrence	4 hr
Aug 30, 9:36 AM CDT	Tornado Warning	JAN	Clarke	39 min
Aug 30, 9:41 AM CDT	Flash Flood Warning	JAN	Lincoln	4 hr
Aug 30, 10:12 AM CDT	River Flood Warning	JAN	Attala, Holmes	12 hr
Aug 30, 10:14 AM CDT	Tornado Warning	JAN	Clarke, Lauderdale	46 min
Aug 30, 10:21 AM CDT	River Flood Warning	JAN	Covington, Forrest	47 hr
Aug 30, 10:24 AM CDT	River Flood Warning	JAN	Clarke	34 hr
Aug 30, 10:36 AM CDT	Flash Flood Warning	JAN	Forrest	3 hr
Aug 30, 10:54 AM CDT	River Flood Warning	JAN	Leake	10 hr
Aug 30, 11:28 AM CDT	Flash Flood Warning	JAN	Jones	107 min
Aug 30, 11:30 AM CDT	River Flood Warning	JAN	Copiah, Simpson	10 hr
Aug 30, 11:30 AM CDT	River Flood Warning	JAN	Lawrence	4 days
Aug 30, 11:30 AM CDT	River Flood Warning	JAN	Marion	56 hr
Aug 30, 11:30 AM CDT	River Flood Warning	JAN	Simpson	10 hr
Aug 30, 12:37 PM CDT	Areal Flood Warning	JAN	Covington, Forrest, Jefferson Davis, Jones, Lamar, Lawrence and 1 more	12 hr
Aug 30, 12:57 PM CDT	Areal Flood Warning	JAN	Copiah, Hinds, Lincoln, Rankin, Simpson	12 hr
Aug 30, 1:38 PM CDT	Tornado Warning	JAN	Kemper, Lauderdale	34 min
Aug 30, 3:37 PM CDT	Flash Flood Warning	JAN	Forrest, Lamar	5 hr
Aug 30, 4:53 PM CDT	Flash Flood Warning	JAN	Washington	112 min
Aug 30, 4:57 PM CDT	Flash Flood Warning	JAN	Jones	3 hr
Aug 30, 5:16 PM CDT	Tornado Warning	JAN	Forrest	14 min
Aug 30, 6:25 PM CDT	Areal Flood Warning	JAN	Lauderdale	8 hr
Aug 30, 6:39 PM CDT	Flash Flood Warning	JAN	Bolivar, Washington	111 min
Aug 30, 6:50 PM CDT	Special Weather Statement	JAN	Claiborne, Warren	45 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.