Alert archive / Mississippi / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 511, NWS Jackson, MS

August 13, 2012Leflore County, Sunflower County, Mississippi

NWS Jackson, MS issued this severe thunderstorm warning at Aug 13, 2012, 6:42 PM CDT for Leflore County, Sunflower County, Mississippi. It was in force for 48 min. 3 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: Aug 13, 2012, 6:42 PM CDT (23:42 UTC)
Expired: Aug 13, 2012, 7:30 PM CDT
In force: 48 min
Issued by: NWS Jackson, MS
Area: Storm-based polygon

Counties Leflore County, MS, Sunflower County, MS

The radar

The Memphis radar (KNQA), 177 km from the middle of the area, began a volume at 23:42 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
Aug 13, 6:44 PM CDT	TSTM WND DMG	3 W Ruleville, MS	TREE DOWNED ACROSS OLD HIGHWAY 8 IN COMMUNITY OF DOCKERY AS RELAYED BY CITY OF RULEVILLE FIRE CHIEF
Aug 13, 6:50 PM CDT	TSTM WND DMG	Ruleville, MS	LARGE LIMB BLOWN OUT OF TREE AT RESIDENCE...KNOCKING OUT POWER. RELAYED BY RULEVILLE FIRE CHIEF.
Aug 13, 6:55 PM CDT	HAIL 1	5 W Doddsville, MS	DIME TO QUARTER SIZE HAIL IN LINN.

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
Aug 13, 3:32 PM CDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Little Rock, AR (KBYH), launched 12:00Z, 11.7 hours before the alert went out and 121 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: 1586 J/kg
Mixed-layer CIN: -113 J/kg
Mixed-layer LCL: 909 m above ground
0-6 km bulk shear: 35 kt
0-1 km storm-relative helicity: 163 m²/s²
0-3 km storm-relative helicity: 211 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 8.0

Open this sounding in Storm Lab

The text

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

101 
WUUS54 KJAN 132342
SVRJAN
MSC083-133-140030-
/O.NEW.KJAN.SV.W.0511.120813T2342Z-120814T0030Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE JACKSON MS
642 PM CDT MON AUG 13 2012

THE NATIONAL WEATHER SERVICE IN JACKSON HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHWESTERN LEFLORE COUNTY IN NORTH CENTRAL MISSISSIPPI...
  NORTHEASTERN SUNFLOWER COUNTY IN NORTHWEST MISSISSIPPI...
  THIS INCLUDES THE CITIES OF...PARCHMAN...RULEVILLE...DREW...

* UNTIL 730 PM CDT

* AT 642 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
  DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED NEAR
  DREW MOVING EAST AT 15 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  BLAINE BY 700 PM CDT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

WINDS OF 60 MPH CAN BRING DOWN TREES...POSSIBLY RESULTING IN INJURY
AND PROPERTY DAMAGE. ROOFS OF MOBILE HOMES AND OUTBUILDINGS COULD BE
DAMAGED...AND MINOR ROOF DAMAGE TO WELL BUILT HOMES AND STRUCTURES
COULD OCCUR.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1100 PM CDT
MONDAY EVENING FOR SOUTHEAST ARKANSAS AND NORTHWESTERN MISSISSIPPI.

&&

LAT...LON 3395 9044 3382 9044 3381 9037 3359 9038
      3361 9066 3396 9065 3396 9045
TIME...MOT...LOC 2342Z 288DEG 15KT 3380 9054

$$

JC

1 follow-up statement

166 
WWUS54 KJAN 140000
SVSJAN

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE JACKSON MS
700 PM CDT MON AUG 13 2012

MSC083-133-140030-
/O.CON.KJAN.SV.W.0511.000000T0000Z-120814T0030Z/
SUNFLOWER MS-LEFLORE MS-
700 PM CDT MON AUG 13 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 730 PM CDT
FOR NORTHWESTERN LEFLORE AND CENTRAL SUNFLOWER COUNTIES...

AT 700 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS WERE TRACKING
A SEVERE THUNDERSTORM CAPABLE OF PRODUCING HALF DOLLAR SIZE HAIL...
AND DESTRUCTIVE WINDS IN EXCESS OF 70 MPH.  THIS STORM WAS LOCATED
NEAR RULEVILLE MOVING SOUTHEAST AT 30 MPH.

THE SEVERE THUNDERSTORM WILL BE NEAR...
  BLAINE BY 705 PM CDT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

WINDS OF 70 MPH CAN SERIOUSLY DAMAGE MOBILE HOMES AND OUTBUILDINGS...
AND CAUSE ROOF DAMAGE TO WELL BUILT HOMES AND STRUCTURES. NUMEROUS
DOWNED TREES MAY OCCUR...POSSIBLY RESULTING IN SERIOUS INJURY AND
PROPERTY DAMAGE.

THE HAIL BEING PRODUCED BY THIS SEVERE THUNDERSTORM WILL LIKELY
DAMAGE CARS AND ROOFS. PEOPLE WHO ARE OUT OF DOORS SHOULD MOVE INSIDE
A STRUCTURE IMMEDIATELY.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1100 PM CDT
MONDAY EVENING FOR SOUTHEAST ARKANSAS AND NORTHWESTERN MISSISSIPPI.

&&

LAT...LON 3392 9044 3382 9044 3381 9037 3359 9038
      3361 9066 3382 9065 3388 9064
TIME...MOT...LOC 0000Z 299DEG 24KT 3372 9048

$$

JC

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 13, 7:12 AM CDT	Special Weather Statement	JAN	Bolivar	58 min
Aug 13, 7:31 AM CDT	Severe Thunderstorm Warning	JAN	Bolivar	59 min
Aug 13, 8:09 AM CDT	Severe Thunderstorm Warning	JAN	Sunflower	66 min
Aug 13, 8:25 AM CDT	Special Weather Statement	JAN	Leflore	30 min
Aug 13, 8:36 AM CDT	Severe Thunderstorm Warning	JAN	Leflore	54 min
Aug 13, 8:50 AM CDT	Flash Flood Warning	JAN	Bolivar	63 min
Aug 13, 8:56 AM CDT	Special Weather Statement	JAN	Washington	29 min
Aug 13, 8:59 AM CDT	Special Weather Statement	JAN	Bolivar	31 min
Aug 13, 9:04 AM CDT	Severe Thunderstorm Warning	JAN	Carroll, Grenada	41 min
Aug 13, 9:25 AM CDT	Flash Flood Warning	JAN	Leflore, Sunflower	48 min
Aug 13, 9:31 AM CDT	Severe Thunderstorm Warning	JAN	Choctaw, Montgomery, Webster	44 min
Aug 13, 10:15 AM CDT	Special Weather Statement	JAN	Attala	40 min
Aug 13, 10:26 AM CDT	Special Weather Statement	JAN	Clay	29 min
Aug 13, 10:28 AM CDT	Special Weather Statement	JAN	Oktibbeha	32 min
Aug 13, 10:31 AM CDT	Special Weather Statement	JAN	Clay, Oktibbeha	29 min
Aug 13, 11:06 AM CDT	Special Weather Statement	JAN	Lowndes, Noxubee, Winston	29 min
Aug 13, 11:22 AM CDT	Special Weather Statement	JAN	Neshoba	43 min
Aug 13, 11:24 AM CDT	Special Weather Statement	JAN	Kemper, Noxubee	41 min
Aug 13, 11:55 AM CDT	Special Weather Statement	JAN	Kemper, Lauderdale, Newton	40 min
Aug 13, 12:21 PM CDT	Special Weather Statement	JAN	Lauderdale, Newton	39 min
Aug 13, 1:01 PM CDT	Special Weather Statement	JAN	Lauderdale	39 min
Aug 13, 1:43 PM CDT	Special Weather Statement	JAN	Clarke	42 min
Aug 13, 3:02 PM CDT	Special Weather Statement	JAN	Bolivar	48 min
Aug 13, 4:18 PM CDT	Special Weather Statement	JAN	Bolivar	52 min
Aug 13, 4:36 PM CDT	Severe Thunderstorm Warning	JAN	Bolivar, Sunflower	39 min
Aug 13, 5:14 PM CDT	Severe Thunderstorm Warning	JAN	Leflore, Sunflower	46 min
Aug 13, 5:25 PM CDT	Severe Thunderstorm Warning	JAN	Bolivar	65 min
Aug 13, 5:46 PM CDT	Severe Thunderstorm Warning	JAN	Grenada, Leflore	44 min
Aug 13, 5:53 PM CDT	Severe Thunderstorm Warning	JAN	Leflore, Sunflower	52 min
Aug 13, 6:03 PM CDT	Flash Flood Warning	JAN	Leflore, Sunflower	117 min
Aug 13, 6:08 PM CDT	Severe Thunderstorm Warning	JAN	Carroll, Grenada, Montgomery	52 min
Aug 13, 6:25 PM CDT	Severe Thunderstorm Warning	JAN	Grenada, Leflore	50 min
Aug 13, 6:30 PM CDT	Severe Thunderstorm Warning	JAN	Bolivar	60 min

Nearby

Severe Thunderstorm Warnings in Mississippi, 2012 Every severe thunderstorm warning 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.