Alert archive / Louisiana / Special Weather Statements in 2012

Special Weather Statement, NWS Jackson, MS

August 9, 2012West Carroll Parish, Louisiana

NWS Jackson, MS issued this special weather statement at Aug 9, 2012, 6:21 PM CDT for West Carroll Parish, Louisiana. 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 9, 2012, 6:21 PM CDT (23:21 UTC)
Expired: Aug 9, 2012, 6:50 PM CDT
In force: 29 min
Issued by: NWS Jackson, MS

County West Carroll Parish, LA

The radar

The Jackson/Brandon,MS radar (KDGX), 134 km from the middle of the area, began a volume at 23:20 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, 11.4 hours before the alert went out and 124 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: 1768 J/kg
Mixed-layer CIN: -35 J/kg
Mixed-layer LCL: 686 m above ground
0-6 km bulk shear: 20 kt
0-1 km storm-relative helicity: 74 m²/s²
0-3 km storm-relative helicity: 84 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.1

Open this sounding in Storm Lab

The text

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

848 
WWUS84 KJAN 092321
SPSJAN
LAZ008-009-092350-
EAST CARROLL LA-WEST CARROLL LA-
621 PM CDT THU AUG 9 2012

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE JACKSON MS
621 PM CDT THU AUG 9 2012

A STRONG THUNDERSTORM CAPABLE OF PRODUCING 30 TO 40 MPH WINDS WAS 
LOCATED 4 MILES NORTHEAST OF DARNELL AT 621 PM CDT...MOVING SOUTHEAST
AT 20 MPH.

DANGEROUS CLOUD TO GROUND LIGHTNING IS ALSO POSSIBLE WITH THIS STORM.

HIGH WINDS CAN BRING DOWN TREES AND LARGE LIMBS RESULTING IN SERIOUS
INJURY OR PROPERTY DAMAGE. EXERCISE EXTREME CAUTION WHEN OUTDOORS
DURING SUCH STRONG WINDS...AND BE ESPECIALLY AWARE OF OLDER TREES.

PEOPLE IN SOUTHERN WEST CARROLL AND SOUTHWESTERN EAST CARROLL
PARISHES SHOULD MONITOR THIS STORM CLOSELY.

LAT...LON 3268 9118 3254 9132 3270 9155 3284 9142
TIME...MOT...LOC 2321Z 309DEG 15KT 3271 9140

$$

BK

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 8, 7:38 PM CDT	Special Weather Statement	JAN	Bolivar	32 min
Aug 8, 7:40 PM CDT	Severe Thunderstorm Warning	JAN	Bolivar	35 min
Aug 8, 8:11 PM CDT	Special Weather Statement	JAN	Clarke	29 min
Aug 9, 6:54 AM CDT	Special Weather Statement	JAN	Webster	26 min
Aug 9, 8:25 AM CDT	Special Weather Statement	JAN	Oktibbeha	25 min
Aug 9, 8:41 AM CDT	Flash Flood Warning	JAN	Carroll, Grenada, Montgomery, Webster	3 hr
Aug 9, 8:50 AM CDT	Flash Flood Warning	JAN	Choctaw, Clay, Oktibbeha, Webster	3 hr
Aug 9, 9:02 AM CDT	Special Weather Statement	JAN	Coahoma	28 min
Aug 9, 9:12 AM CDT	Special Weather Statement	JAN	Grenada	28 min
Aug 9, 11:00 AM CDT	Special Weather Statement	JAN	Attala	45 min
Aug 9, 11:22 AM CDT	Special Weather Statement	JAN	Attala	28 min
Aug 9, 11:38 AM CDT	Special Weather Statement	JAN	Madison	47 min
Aug 9, 12:42 PM CDT	Special Weather Statement	JAN	Leake, Neshoba	43 min
Aug 9, 1:27 PM CDT	Special Weather Statement	JAN	Simpson	43 min
Aug 9, 1:41 PM CDT	Special Weather Statement	JAN	Hinds	44 min
Aug 9, 2:22 PM CDT	Special Weather Statement	JAN	Copiah, Rankin, Simpson	43 min
Aug 9, 2:53 PM CDT	Special Weather Statement	JAN	Lincoln	32 min
Aug 9, 3:10 PM CDT	Special Weather Statement	JAN	Lincoln	30 min
Aug 9, 3:20 PM CDT	Special Weather Statement	JAN	Forrest	30 min
Aug 9, 3:30 PM CDT	Special Weather Statement	JAN	Covington	30 min
Aug 9, 3:41 PM CDT	Severe Thunderstorm Warning	JAN	Covington, Jones	38 min
Aug 9, 3:55 PM CDT	Special Weather Statement	JAN	Lamar, Marion	30 min
Aug 9, 4:02 PM CDT	Severe Thunderstorm Warning	JAN	Forrest, Lamar, Marion	58 min
Aug 9, 4:10 PM CDT	Special Weather Statement	JAN	Jones	30 min
Aug 9, 5:01 PM CDT	Special Weather Statement	JAN	Forrest	29 min
Aug 9, 2:47 PM CDT	Special Weather Statement	JAN	Concordia	33 min
Aug 9, 6:14 PM CDT	Special Weather Statement	JAN	Madison	31 min
Aug 9, 6:29 PM CDT	Severe Thunderstorm Warning	JAN	East Carroll, West Carroll	46 min
Aug 9, 6:52 PM CDT	Special Weather Statement	JAN	Tensas	28 min
Aug 9, 6:57 PM CDT	Severe Thunderstorm Warning	JAN	East Carroll, Madison	48 min
Aug 8, 7:07 PM CDT	Special Weather Statement	JAN	Chicot	28 min
Aug 9, 6:41 PM CDT	Special Weather Statement	JAN	Ashley	29 min

Nearby

Special Weather Statements in Louisiana, 2012 Every special weather statement 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.