Alert archive / Mississippi / Tornado Warnings in 2012

Tornado Warning 77, NWS Jackson, MS

October 17, 2012Holmes County, Yazoo County, Mississippi

NWS Jackson, MS issued this tornado warning at Oct 17, 2012, 11:13 PM CDT for Holmes County, Yazoo County, Mississippi. It was in force for 47 min. 1 report 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: Oct 17, 2012, 11:13 PM CDT (04:13 UTC)
Expired: Oct 18, 2012, 12:00 AM CDT
In force: 47 min
Issued by: NWS Jackson, MS
Area: Storm-based polygon

Counties Holmes County, MS, Yazoo County, MS

The radar

The Jackson/Brandon,MS radar (KDGX), 63 km from the middle of the area, began a volume at 04:13 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
Oct 17, 11:29 PM CDT	TORNADO 1	6 E Midway, MS	THIS TORNADO CAUSED ONLY TREE DAMAGE IN FAR NE YAZOO COUNTY. MAX WIND SPEED 90 MPH...PATH LENGTH 2 MILES...MAX PATH WIDTH 250 YARDS.

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
Oct 17, 7:01 PM CDT	Tornado Watch	SPC	8 hr

The nearest sounding before it

Jackson, MS (KJAN), launched 00:00Z, 4.2 hours before the alert went out and 58 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.

452 
WFUS54 KJAN 180413
TORJAN
MSC051-163-180500-
/O.NEW.KJAN.TO.W.0077.121018T0413Z-121018T0500Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE JACKSON MS
1113 PM CDT WED OCT 17 2012

THE NATIONAL WEATHER SERVICE IN JACKSON HAS ISSUED A

* TORNADO WARNING FOR...
  SOUTH CENTRAL HOLMES COUNTY IN CENTRAL MISSISSIPPI...
  NORTHEASTERN YAZOO COUNTY IN CENTRAL MISSISSIPPI...

* UNTIL MIDNIGHT CDT

* AT 1113 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO 9 MILES
  NORTHWEST OF BENTON MOVING EAST AT 40 MPH.

* THE TORNADO WILL BE NEAR...
  BENTON BY 1120 PM CDT...
  MIDWAY BY 1125 PM CDT...
  VAUGHAN AND PICKENS BY 1140 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.

IN ADDITION TO THE TORNADO...THIS STORM IS CAPABLE OF PRODUCING 
DESTRUCTIVE STRAIGHT LINE WINDS!

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

&&

LAT...LON 3291 8992 3288 8996 3284 8999 3283 9002
      3279 9002 3275 9004 3272 9008 3282 9033
      3298 9025
TIME...MOT...LOC 0413Z 290DEG 35KT 3290 9033

$$

BYB

The office that day

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

Issued	Product	Office	Counties	Lasted
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, 9:41 PM CDT	Tornado Warning	JAN	Washington	30 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, 11:27 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 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.