Alert archive / Arkansas / Tornado Warnings in 2012

Tornado Warning 73, NWS Jackson, MS

October 17, 2012Chicot County, Arkansas; Washington County, Mississippi

NWS Jackson, MS issued this tornado warning at Oct 17, 2012, 9:41 PM CDT for Chicot County, Arkansas; Washington County, Mississippi. It was in force for 30 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: Oct 17, 2012, 9:41 PM CDT (02:41 UTC)
Expired: Oct 17, 2012, 10:11 PM CDT
In force: 30 min
Issued by: NWS Jackson, MS
Area: Storm-based polygon

Counties Chicot County, AR, Washington County, MS

The radar

The Jackson/Brandon,MS radar (KDGX), 137 km from the middle of the area, began a volume at 02:44 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
Oct 17, 7:01 PM CDT	Tornado Watch	SPC	8 hr

The nearest sounding before it

Jackson, MS (KJAN), launched 00:00Z, 2.7 hours before the alert went out and 128 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: 229 J/kg
Mixed-layer CIN: -14 J/kg
Mixed-layer LCL: 1020 m above ground
0-6 km bulk shear: 49 kt
0-1 km storm-relative helicity: 157 m²/s²
0-3 km storm-relative helicity: 316 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 1.3

Open this sounding in Storm Lab

The text

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

566 
WFUS54 KJAN 180241
TORJAN
ARC017-MSC151-180330-
/O.NEW.KJAN.TO.W.0073.121018T0241Z-121018T0330Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE JACKSON MS
941 PM CDT WED OCT 17 2012

THE NATIONAL WEATHER SERVICE IN JACKSON HAS ISSUED A

* TORNADO WARNING FOR...
  CENTRAL WASHINGTON COUNTY IN NORTHWEST MISSISSIPPI...
  THIS INCLUDES THE CITIES OF...AVON...HOLLANDALE...
  EAST CENTRAL CHICOT COUNTY IN SOUTHEAST ARKANSAS...

* UNTIL 1030 PM CDT

* AT 941 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO 7 MILES WEST OF
  AVON MOVING EAST AT 45 MPH.

* THE TORNADO WILL BE NEAR...
  WAYSIDE AND AVON BY 950 PM CDT...
  ESTILL AND HOLLANDALE BY 1005 PM CDT...
  DARLOVE AND TRIBBETT BY 1010 PM 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 300 AM CDT THURSDAY MORNING
FOR SOUTHEAST ARKANSAS AND NORTHEAST LOUISIANA AND MISSISSIPPI.

&&

LAT...LON 3335 9126 3337 9076 3327 9076 3327 9073
      3323 9074 3320 9068 3315 9069 3314 9069
      3317 9126
TIME...MOT...LOC 0241Z 270DEG 37KT 3326 9114

$$

BYB

2 follow-up statements

010 
WWUS54 KJAN 180251
SVSJAN

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE JACKSON MS
951 PM CDT WED OCT 17 2012

ARC017-180302-
/O.CAN.KJAN.TO.W.0073.000000T0000Z-121018T0330Z/
CHICOT AR-
951 PM CDT WED OCT 17 2012

...THE TORNADO WARNING FOR EAST CENTRAL CHICOT COUNTY IS CANCELLED...

A TORNADO WATCH REMAINS IN EFFECT UNTIL 300 AM CDT THURSDAY MORNING
FOR SOUTHEAST ARKANSAS AND NORTHEAST LOUISIANA AND MISSISSIPPI.

LAT...LON 3337 9076 3327 9076 3327 9073 3323 9074
      3320 9068 3314 9069 3316 9108 3322 9109
      3324 9106 3328 9104 3328 9108 3324 9110
      3330 9114 3335 9114
TIME...MOT...LOC 0252Z 270DEG 37KT 3326 9100

$$

MSC151-180330-
/O.CON.KJAN.TO.W.0073.000000T0000Z-121018T0330Z/
WASHINGTON MS-
951 PM CDT WED OCT 17 2012

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 1030 PM CDT FOR CENTRAL
WASHINGTON COUNTY...

AT 952 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS CONTINUE TO
TRACK A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO.  THIS
TORNADO WAS LOCATED NEAR WAYSIDE MOVING EAST AT 45 MPH.

THE TORNADO WILL BE NEAR...
  ARCOLA BY 1000 PM CDT...
  ESTILL AND HOLLANDALE BY 1005 PM CDT...
  DARLOVE AND TRIBBETT BY 1010 PM 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 300 AM CDT THURSDAY MORNING
FOR SOUTHEAST ARKANSAS AND NORTHEAST LOUISIANA AND MISSISSIPPI.

&&

LAT...LON 3337 9076 3327 9076 3327 9073 3323 9074
      3320 9068 3314 9069 3316 9108 3322 9109
      3324 9106 3328 9104 3328 9108 3324 9110
      3330 9114 3335 9114
TIME...MOT...LOC 0252Z 270DEG 37KT 3326 9100

$$

BYB

546 
WWUS54 KJAN 180311
SVSJAN

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE JACKSON MS
1011 PM CDT WED OCT 17 2012

MSC151-180322-
/O.CAN.KJAN.TO.W.0073.000000T0000Z-121018T0330Z/
WASHINGTON MS-
1011 PM CDT WED OCT 17 2012

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

THE STORM THAT PROMPTED THE TORNADO WARNING HAS MOVED OUT OF THE
COUNTY.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 300 AM CDT THURSDAY MORNING
FOR SOUTHEAST ARKANSAS AND NORTHEAST LOUISIANA AND MISSISSIPPI.

LAT...LON 3337 9076 3327 9076 3327 9073 3323 9074
      3320 9068 3314 9069 3316 9108 3322 9109
      3324 9106 3328 9104 3328 9108 3324 9110
      3330 9114 3335 9114
TIME...MOT...LOC 0312Z 270DEG 37KT 3326 9075

$$

BYB

The office that day

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

Issued	Product	Office	Counties	Lasted
Oct 17, 8:27 PM CDT	Severe Thunderstorm Warning	JAN	Ashley	63 min
Oct 17, 8:49 PM CDT	Severe Thunderstorm Warning	JAN	Ashley	56 min
Oct 17, 9:54 PM CDT	Severe Thunderstorm Warning	JAN	Chicot	36 min
Oct 17, 8:41 PM CDT	Severe Thunderstorm Warning	JAN	Bolivar	64 min
Oct 17, 8:48 PM CDT	Tornado Warning	JAN	Bolivar	41 min
Oct 17, 9:02 PM CDT	Tornado Warning	JAN	Bolivar	43 min
Oct 17, 9:07 PM CDT	Severe Thunderstorm Warning	JAN	Sunflower	53 min
Oct 17, 9:13 PM CDT	Tornado Warning	JAN	Sunflower	33 min
Oct 17, 9:57 PM CDT	Severe Thunderstorm Warning	JAN	Grenada	63 min
Oct 17, 10:05 PM CDT	Tornado Warning	JAN	Grenada	40 min
Oct 17, 10:09 PM CDT	Tornado Warning	JAN	Leflore	36 min
Oct 17, 10:25 PM CDT	Severe Thunderstorm Warning	JAN	Holmes, Humphreys, Issaquena, Sharkey, Yazoo	65 min
Oct 17, 10:29 PM CDT	Severe Thunderstorm Warning	JAN	Carroll	31 min
Oct 17, 10:37 PM CDT	Tornado Warning	JAN	Holmes, Humphreys, Sharkey, Yazoo	53 min
Oct 17, 10:45 PM CDT	Severe Thunderstorm Warning	JAN	Clay, Webster	60 min
Oct 17, 11:13 PM CDT	Tornado Warning	JAN	Holmes, Yazoo	47 min
Oct 17, 11:27 PM CDT	Tornado Warning	JAN	Yazoo	48 min
Oct 17, 11:36 PM CDT	Tornado Warning	JAN	Attala, Madison	39 min
Oct 17, 11:40 PM CDT	Severe Thunderstorm Warning	JAN	Clay, Lowndes, Oktibbeha	65 min
Oct 17, 11:49 PM CDT	Severe Thunderstorm Warning	JAN	Madison	56 min
Oct 17, 11:59 PM CDT	Tornado Warning	JAN	Madison, Rankin	46 min
Oct 18, 12:03 AM CDT	Tornado Warning	JAN	Leake, Scott	57 min
Oct 18, 12:50 AM CDT	Tornado Warning	JAN	Neshoba, Newton, Scott	55 min
Oct 18, 1:02 AM CDT	Severe Thunderstorm Warning	JAN	Claiborne, Copiah, Jefferson, Lincoln	58 min
Oct 18, 1:03 AM CDT	Tornado Warning	JAN	Hinds	12 min
Oct 18, 1:07 AM CDT	Severe Thunderstorm Warning	JAN	Noxubee	38 min
Oct 18, 1:27 AM CDT	Tornado Warning	JAN	Clarke, Lauderdale	63 min
Oct 18, 1:41 AM CDT	Tornado Warning	JAN	Kemper, Lauderdale	34 min
Oct 18, 1:44 AM CDT	Severe Thunderstorm Warning	JAN	Rankin	15 min
Oct 18, 1:49 AM CDT	Severe Thunderstorm Warning	JAN	Franklin, Jefferson, Lincoln	56 min

Nearby

Tornado Warnings in Arkansas, 2012 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.