Alert archive / Louisiana / Special Weather Statements in 2012

Special Weather Statement, NWS Jackson, MS

January 17, 2012Franklin Parish, Louisiana

NWS Jackson, MS issued this special weather statement at Jan 17, 2012, 1:49 PM CST for Franklin Parish, Louisiana. It was in force for 41 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: Jan 17, 2012, 1:49 PM CST (19:49 UTC)
Expired: Jan 17, 2012, 2:30 PM CST
In force: 41 min
Issued by: NWS Jackson, MS

County Franklin Parish, LA

The nearest sounding before it

Shreveport, LA (KSHV), launched 12:00Z, 7.8 hours before the alert went out and 180 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: 1305 J/kg
Mixed-layer CIN: -22 J/kg
Mixed-layer LCL: 635 m above ground
0-6 km bulk shear: 54 kt
0-1 km storm-relative helicity: 254 m²/s²
0-3 km storm-relative helicity: 244 m²/s²
Significant tornado parameter: 1.7
Supercell composite: 7.9

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 Jan 17, 11:08 AM CST, 2 hours 41 minutes earlier.

Area forecast discussion, Jan 17, 11:08 AM CST, 2 hours 41 minutes before

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Hazardous weather outlook, Jan 17, 11:59 AM CST, 1 hour 50 minutes before

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In the hours before

Special weather statement, Jan 17, 1:27 PM CST, 22 minutes before

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Special weather statement, Jan 17, 1:31 PM CST, 18 minutes before

MSZ043-048-049-172030-
RANKIN MS-MADISON MS-HINDS MS-
131 PM CST TUE JAN 17 2012

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE JACKSON MS
131 PM CST TUE JAN 17 2012

A CLUSTER OF STRONG THUNDERSTORMS CAPABLE OF PRODUCING VERY HEAVY
RAIN WAS LOCATED AROUND JACKSON AT 128 PM CST...MOVING EAST AT 40
MPH. LOCALLY HEAVY RAINFALL MAY CAUSE PONDING OF ROADWAYS IN THE
JACKSON METRO AREA AS WELL AS THE NORTHERN AREAS OF HINDS AND RANKIN
COUNTIES AS WELL AS SOUTHERN MADISON COUNTIES.  THIS COULD CAUSE
SOME BRIEF FLOODING IN LOW LYING AREAS AND ROAD DRAINAGE AREAS.
RAINFALL AMOUNTS WILL BE AROUND 1 TO 2 INCHES.

PEOPLE IN NORTHEASTERN HINDS...SOUTH CENTRAL MADISON AND NORTHERN
RANKIN COUNTIES SHOULD MONITOR THIS STORM CLOSELY.

LAT...LON 3248 8979 3227 8975 3229 9043 3248 9046
TIME...MOT...LOC 1928Z 271DEG 64KT 3238 9011

MRM

Special weather statement, Jan 17, 1:46 PM CST, 3 minutes before

MSZ026-027-029-172030-
WEBSTER MS-GRENADA MS-CARROLL MS-
146 PM CST TUE JAN 17 2012

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE JACKSON MS
146 PM CST TUE JAN 17 2012

...STRONG STORMS CONTINUE ACROSS GRENADA COUNTY...

STRONG THUNDERSTORMS CAPABLE OF PRODUCING PEA TO DIME SIZE HAIL AND
VERY HEAVY RAINFALL WERE OVER MUCH OF GRENADA COUNTY AT 145 PM
CST...MOVING EAST AT 35 MPH.

MINOR FLOODING OF POOR DRAINAGE AREAS MAY OCCUR.

PEOPLE IN EXTREME NORTHWESTERN CARROLL...GRENADA AND NORTHWESTERN
WEBSTER COUNTIES SHOULD MONITOR THESE STORMS CLOSELY.

LAT...LON 3387 8976 3387 8951 3386 8950 3373 8950
      3373 8935 3370 8935 3367 9008 3382 9010
      3382 8999 3383 8993 3387 8993 3390 8976
TIME...MOT...LOC 1945Z 263DEG 32KT 3377 8999

AEG

Special weather statement, Jan 17, 1:49 PM CST, 0 minutes before

LAZ015-016-023-172030-
RICHLAND LA-FRANKLIN LA-MADISON LA-
149 PM CST TUE JAN 17 2012

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE JACKSON MS
149 PM CST TUE JAN 17 2012

A STRONG THUNDERSTORM CAPABLE OF PRODUCING PENNY TO NICKEL SIZE HAIL
AND 40 TO 50 MPH WINDS WAS LOCATED 21 MILES WEST OF LIDDIEVILLE AT
148 PM CST...MOVING EAST AT 45 MPH.

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 EXTREME SOUTHWESTERN MADISON...NORTHERN FRANKLIN AND
SOUTHWESTERN RICHLAND PARISHES SHOULD MONITOR THIS STORM CLOSELY.

LAT...LON 3240 9154 3208 9154 3203 9191 3208 9193
      3210 9188 3214 9190 3216 9190 3216 9198
      3219 9199 3220 9201 3221 9200 3227 9200
      3228 9202
TIME...MOT...LOC 1948Z 259DEG 39KT 3210 9214

MRM

The office that day

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

Issued	Product	Office	Counties	Lasted
Jan 17, 1:27 PM CST	Special Weather Statement	JAN	Grenada	28 min
Jan 17, 1:31 PM CST	Special Weather Statement	JAN	Rankin	59 min
Jan 17, 1:46 PM CST	Special Weather Statement	JAN	Grenada	44 min
Jan 17, 2:57 PM CST	Special Weather Statement	JAN	Claiborne	43 min
Jan 17, 3:26 PM CST	Special Weather Statement	JAN	Lamar, Marion	44 min
Jan 17, 3:34 PM CST	Severe Thunderstorm Warning	JAN	Lamar, Marion	56 min
Jan 17, 3:55 PM CST	Tornado Warning	JAN	Lamar, Marion	35 min
Jan 17, 4:29 PM CST	Severe Thunderstorm Warning	JAN	Forrest, Lamar	37 min
Jan 17, 4:40 PM CST	Special Weather Statement	JAN	Wilkinson	30 min
Jan 17, 5:34 PM CST	Special Weather Statement	JAN	Kemper, Leake, Neshoba, Noxubee, Rankin, Scott	26 min
Jan 17, 3:11 PM CST	Special Weather Statement	JAN	Concordia	44 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.