Alert archive / Mississippi / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 554, NWS Jackson, MS

August 31, 2012Issaquena County, Warren County, Mississippi

NWS Jackson, MS issued this severe thunderstorm warning at Aug 31, 2012, 4:37 PM CDT for Issaquena County, Warren County, Mississippi. It was in force for 38 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 31, 2012, 4:37 PM CDT (21:37 UTC)
Expired: Aug 31, 2012, 5:15 PM CDT
In force: 38 min
Issued by: NWS Jackson, MS
Area: Storm-based polygon

Counties Issaquena County, MS, Warren County, MS

The radar

The Jackson/Brandon,MS radar (KDGX), 78 km from the middle of the area, began a volume at 21:41 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 nearest sounding before it

Jackson, MS (KJAN), launched 12:00Z, 9.6 hours before the alert went out and 68 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: 1202 J/kg
Mixed-layer CIN: -6 J/kg
Mixed-layer LCL: 583 m above ground
0-6 km bulk shear: 21 kt
0-1 km storm-relative helicity: 186 m²/s²
0-3 km storm-relative helicity: 212 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 3.1

Open this sounding in Storm Lab

The text

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

106 
WUUS54 KJAN 312137
SVRJAN
MSC055-149-312215-
/O.NEW.KJAN.SV.W.0554.120831T2137Z-120831T2215Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE JACKSON MS
437 PM CDT FRI AUG 31 2012

THE NATIONAL WEATHER SERVICE IN JACKSON HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHEASTERN ISSAQUENA COUNTY IN WEST CENTRAL MISSISSIPPI...
  NORTHEASTERN WARREN COUNTY IN WEST CENTRAL MISSISSIPPI...
  THIS INCLUDES THE CITY OF REDWOOD...

* UNTIL 515 PM CDT

* AT 437 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS
  OF 60 MPH.  THIS STORM WAS LOCATED NEAR REDWOOD MOVING NORTH AT 25
  MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  REDWOOD BY 445 PM CDT...
  OAK RIDGE BY 450 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.

&&

LAT...LON 3266 9083 3266 9073 3264 9069 3262 9072
      3261 9069 3259 9069 3259 9066 3255 9066
      3254 9061 3236 9072 3236 9088 3245 9092
TIME...MOT...LOC 2137Z 201DEG 23KT 3243 9080

$$

JA

1 follow-up statement

777 
WWUS54 KJAN 312207
SVSJAN

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE JACKSON MS
507 PM CDT FRI AUG 31 2012

MSC055-149-312217-
/O.EXP.KJAN.SV.W.0554.000000T0000Z-120831T2215Z/
WARREN MS-ISSAQUENA MS-
507 PM CDT FRI AUG 31 2012

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN ISSAQUENA AND
NORTHEASTERN WARREN COUNTIES WILL EXPIRE AT 515 PM CDT...

THE STORM THAT PROMPTED THE SEVERE THUNDERSTORM WARNING HAS MOVED 
INTO SHARKEY COUNTY.

LAT...LON 3266 9083 3266 9073 3264 9069 3262 9072
      3261 9069 3259 9069 3259 9066 3255 9066
      3254 9061 3236 9072 3236 9088 3245 9092
TIME...MOT...LOC 2207Z 201DEG 23KT 3261 9072

$$

EEC

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 30, 7:41 PM CDT	Special Weather Statement	JAN	Rankin, Simpson	59 min
Aug 30, 8:01 PM CDT	Special Weather Statement	JAN	Jasper	29 min
Aug 30, 8:10 PM CDT	Tornado Warning	JAN	Jasper	50 min
Aug 30, 8:23 PM CDT	Tornado Warning	JAN	Covington, Jasper, Jones, Smith	37 min
Aug 30, 8:29 PM CDT	Areal Flood Warning	JAN	Bolivar, Washington	12 hr
Aug 30, 8:35 PM CDT	Flash Flood Watch	JAN	Adams, Claiborne, Clarke, Copiah, Covington, Forrest and 20 more	4 hr
Aug 30, 8:48 PM CDT	Tornado Warning	JAN	Jefferson Davis, Lawrence, Marion	42 min
Aug 30, 8:48 PM CDT	Tornado Warning	JAN	Newton	45 min
Aug 30, 9:03 PM CDT	Flash Flood Warning	JAN	Jefferson Davis, Lawrence, Marion	117 min
Aug 30, 9:29 PM CDT	Tornado Warning	JAN	Neshoba	46 min
Aug 30, 9:39 PM CDT	Special Weather Statement	JAN	Rankin	31 min
Aug 30, 10:07 PM CDT	Tornado Warning	JAN	Attala, Choctaw, Winston	32 min
Aug 31, 1:36 AM CDT	Special Weather Statement	JAN	Madison, Rankin	29 min
Aug 31, 10:21 AM CDT	River Flood Warning	JAN	Copiah, Simpson	48 hr
Aug 31, 3:11 PM CDT	Special Weather Statement	JAN	Claiborne, Jefferson	39 min
Aug 31, 3:30 PM CDT	Special Weather Statement	JAN	Jasper, Simpson, Smith	40 min
Aug 31, 3:43 PM CDT	Special Weather Statement	JAN	Claiborne	32 min
Aug 31, 4:02 PM CDT	Special Weather Statement	JAN	Warren	43 min
Aug 31, 4:19 PM CDT	Special Weather Statement	JAN	Lamar, Marion	41 min
Aug 31, 4:57 PM CDT	Severe Thunderstorm Warning	JAN	Sharkey	33 min
Aug 31, 5:01 PM CDT	Special Weather Statement	JAN	Madison	29 min
Aug 31, 5:28 PM CDT	Special Weather Statement	JAN	Lowndes	32 min
Aug 31, 5:29 PM CDT	Special Weather Statement	JAN	Lowndes	31 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.