Alert archive / Louisiana / Special Weather Statements in 2011

Special Weather Statement, NWS Jackson, MS

October 12, 2011Morehouse Parish, Louisiana

NWS Jackson, MS issued this special weather statement at Oct 12, 2011, 1:55 PM CDT for Morehouse Parish, Louisiana. 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 12, 2011, 1:55 PM CDT (18:55 UTC)
Expired: Oct 12, 2011, 2:25 PM CDT
In force: 30 min
Issued by: NWS Jackson, MS

County Morehouse Parish, LA

The radar

The Jackson/Brandon,MS radar (KDGX), 178 km from the middle of the area, began a volume at 18:57 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, 6.9 hours before the alert went out and 168 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 0 m above ground
0-6 km bulk shear: 34 kt
0-1 km storm-relative helicity: 42 m²/s²
0-3 km storm-relative helicity: 25 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.2

Open this sounding in Storm Lab

The text

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

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What forecasters said that day

The local office's own words before this special weather statement went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Jackson, MS wrote its last area forecast discussion before this special weather statement went out at Oct 12, 10:43 AM CDT, 3 hours 12 minutes earlier.

Area forecast discussion, Oct 12, 10:43 AM CDT, 3 hours 12 minutes before

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Hazardous weather outlook, Oct 12, 10:55 AM CDT, 3 hours before

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In the hours before

Special weather statement, Oct 12, 1:55 PM CDT, 0 minutes before

LAZ007-121925-
MOREHOUSE LA-
155 PM CDT WED OCT 12 2011

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE JACKSON MS
155 PM CDT WED OCT 12 2011

A STRONG THUNDERSTORM CAPABLE OF PRODUCING PEA TO DIME SIZE HAIL AND
40 TO 50 MPH WINDS WAS LOCATED 4 MILES NORTHWEST OF BASTROP AT 156 PM
CDT...MOVING EAST AT 30 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 NORTHERN MOREHOUSE PARISH SHOULD MONITOR THIS STORM
CLOSELY.

LAT...LON 3290 9205 3301 9164 3300 9160 3283 9157
      3278 9160 3275 9160 3272 9162 3271 9164
      3272 9204 3273 9205
TIME...MOT...LOC 1856Z 269DEG 26KT 3281 9193

BYB

The office that day

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

Issued	Product	Office	Counties	Lasted
Oct 12, 3:11 PM CDT	Severe Thunderstorm Warning	JAN	Issaquena	52 min
Oct 12, 4:07 PM CDT	Special Weather Statement	JAN	Hinds, Madison, Sharkey, Warren, Yazoo	73 min
Oct 12, 4:26 PM CDT	Special Weather Statement	JAN	Leflore	29 min
Oct 12, 4:32 PM CDT	Severe Thunderstorm Warning	JAN	Carroll, Holmes, Leflore	28 min
Oct 12, 4:58 PM CDT	Special Weather Statement	JAN	Madison	27 min
Oct 12, 5:37 PM CDT	Special Weather Statement	JAN	Carroll	28 min
Oct 12, 5:40 PM CDT	Special Weather Statement	JAN	Rankin, Scott, Simpson	30 min
Oct 12, 6:17 PM CDT	Special Weather Statement	JAN	Jefferson Davis	33 min
Oct 12, 6:29 PM CDT	Special Weather Statement	JAN	Covington, Smith	31 min
Oct 12, 6:50 PM CDT	Special Weather Statement	JAN	Covington	30 min
Oct 12, 6:53 PM CDT	Special Weather Statement	JAN	Clarke, Jasper, Kemper, Lauderdale, Neshoba, Newton	62 min
Oct 12, 2:33 PM CDT	Special Weather Statement	JAN	Richland	47 min
Oct 12, 2:57 PM CDT	Special Weather Statement	JAN	East Carroll, West Carroll	43 min

Nearby

Special Weather Statements in Louisiana, 2011 Every special weather statement in 2011

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.