Alert archive / Mississippi / Special Weather Statements in 2012

Special Weather Statement, NWS Jackson, MS

December 4, 2012Leflore County, Mississippi

NWS Jackson, MS issued this special weather statement at Dec 4, 2012, 3:36 PM CST for Leflore County, Mississippi. 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: Dec 4, 2012, 3:36 PM CST (21:36 UTC)
Expired: Dec 4, 2012, 4:05 PM CST
In force: 29 min
Issued by: NWS Jackson, MS

County Leflore County, MS

The radar

The Jackson/Brandon,MS radar (KDGX), 127 km from the middle of the area, began a volume at 21:39 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 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: 177 J/kg
Mixed-layer CIN: -65 J/kg
Mixed-layer LCL: 670 m above ground
0-6 km bulk shear: 18 kt
0-1 km storm-relative helicity: 115 m²/s²
0-3 km storm-relative helicity: 149 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.4

Open this sounding in Storm Lab

The text

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

183 
WWUS84 KJAN 042136
SPSJAN
MSZ019-025-035-042205-
SUNFLOWER MS-LEFLORE MS-HUMPHREYS MS-
336 PM CST TUE DEC 4 2012

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE JACKSON MS
336 PM CST TUE DEC 4 2012

A STRONG THUNDERSTORM CAPABLE OF PRODUCING PEA TO DIME SIZE HAIL AND
30 TO 40 MPH WINDS WAS LOCATED OVER INVERNESS AT 336 PM CST...MOVING
NORTHEAST AT 20 MPH.

VERY HEAVY RAIN IS ALSO POSSIBLE WITH THIS STORM.

PEOPLE IN NORTHWESTERN HUMPHREYS...SOUTHERN LEFLORE AND SOUTHERN
SUNFLOWER COUNTIES SHOULD MONITOR THIS STORM CLOSELY.

LAT...LON 3359 9029 3337 9017 3336 9018 3334 9022
      3337 9032 3335 9028 3334 9028 3332 9030
      3321 9063 3337 9072
TIME...MOT...LOC 2136Z 244DEG 16KT 3333 9058

$$

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 Dec 4, 11:50 AM CST, 3 hours 46 minutes earlier.

Area forecast discussion, Dec 4, 11:50 AM CST, 3 hours 46 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE JACKSON MS
1150 AM CST TUE DEC 4 2012

.UPDATE...A LARGE AREA OF RAIN HAS DEVELOPED ACROSS THE SOUTHEAST
PORTIONS OF THE CWA...WITH RAIN TRAINING OVER THE SAME AREAS FOR THE
PAST FEW HOURS. LUCKILY RAINFALL AMOUNTS HAVE BEEN SMALL. LIGHT TO
MODERATE RAINFALL WILL CONTINUE...EXPECTING ISOLATED DOWNPOURS NEAR
THUNDERSTORMS.

CONVECTION CONTINUES TO DEVELOP ALONG THE LOUISIANA COAST BUT
STRUGGLES FURTHER INLAND. BEST INSTABILITY REMAINS JUST WEST OF THE
CWA...SO EXPECTING MORE CONVECTION TO DEVELOP OVER THE WESTERN PARTS
OF THE CWA SHORTLY. THE BOUNDARY WAS NOT MOVING SOUTH VERY FAST...SO
ADJUSTED THE POPS AND THUNDER WORDING ACROSS THE NORTHWEST...MAINLY
TO PUSH WIDESPREAD THUNDER BACK A LITTLE LATER INTO THE AFTERNOON.
WENT WITH ISOLATED THUNDER WORDING FOR THE NEXT COUPLE HOURS FOR
AREAS WEST OF INTERSTATE 55. MODELS KEEP THE INSTABILITY TO THE
WEST...BUT COULD SEE ENOUGH ENERGY TO BRING SOME STORMS INTO THE
AREA...MAINLY THE WEST. WILL KEEP THE STRONG WORDING IN THE HWO.

TEMPS WERE ON TARGET. OVERALL NO BIG CHANGES. UPDATE COMING SHORTLY.

&&

.AVIATION...WIDESPREAD MVFR CLOUD DECKS...ALONG WITH LOCAL POCKETS
OF IFR...WILL PERSIST INTO THE EARLY AFTERNOON. AREAS OF RAIN WILL
BE COMMON ALONG AND E OF THE NATCHEZ TRACE WITH SCT TSTMS DVLPG AND
CONTINUING THROUGH THE EVENING. ISOLATED SHOWERS TO THE NW OF THE
TRACE WILL INCREASE THIS AFTERNOON AND CONTINUE THROUGH THE EARLY
EVENING AS A COLD FRONT/UPPER LEVEL SYSTEM APPROACH TODAY. LOW
CEILINGS WILL BE A PROBLEM FOR MUCH OF THE PERIOD...ESPECIALLY LATE
TONIGHT WHEN WIDESPREAD LIFR CATEGORY LOW STRATUS COULD DEVELOP.
MVFR OCNL IFR VSBYS CAN BE EXPECTED IN AREAS OF RAIN.

&&

.PRELIMINARY POINT TEMPS/POPS...
JACKSON       75  56  70  54 /  79  88  55  20
MERIDIAN      72  57  71  52 /  78  84  63  23
VICKSBURG     76  54  68  49 /  74  79  37  15
HATTIESBURG   77  58  74  53 /  66  75  56  18
NATCHEZ       74  57  69  53 /  70  77  37  15
GREENVILLE    75  53  65  48 /  77  68  20  11
GREENWOOD     73  55  67  52 /  81  79  37  16

&&

.JAN WATCHES/WARNINGS/ADVISORIES...
MS...NONE.
LA...NONE.
AR...NONE.
&&

07/03

Hazardous weather outlook, Dec 4, 2:26 PM CST, 1 hour 10 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE JACKSON MS
226 PM CST TUE DEC 4 2012

ARZ074-075-LAZ007>009-015-016-023>026-MSZ018-019-025>029-032-
034>037-040>043-047>049-053-054-059>062-052030-
ASHLEY-CHICOT-MOREHOUSE-WEST CARROLL-EAST CARROLL-RICHLAND-
MADISON LA-FRANKLIN LA-CATAHOULA-TENSAS-CONCORDIA-BOLIVAR-
SUNFLOWER-LEFLORE-GRENADA-CARROLL-MONTGOMERY-WEBSTER-CHOCTAW-
WASHINGTON-HUMPHREYS-HOLMES-ATTALA-ISSAQUENA-SHARKEY-YAZOO-
MADISON MS-WARREN-HINDS-RANKIN-CLAIBORNE-COPIAH-JEFFERSON-ADAMS-
FRANKLIN MS-LINCOLN-
226 PM CST TUE DEC 4 2012

THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL MISSISSIPPI...
NORTHEAST LOUISIANA...AND EXTREME SOUTHEAST ARKANSAS.

.DAY ONE...TONIGHT AND WEDNESDAY

STRONG THUNDERSTORMS WILL BE POSSIBLE THIS AFTERNOON AND EVENING.
THEY WILL HAVE THE POTENTIAL FOR WIND GUSTS OF 40 TO 50
MPH AND SMALL HAIL ALONG WITH FREQUENT LIGHTNING STRIKES AND PERIODS
OF HEAVY RAIN. ONE OR TWO SEVERE STORMS WITH WIND GUSTS TO 60 MPH
AND QUARTER SIZE HAIL CAN NOT BE RULED OUT. LOCAL FLOODING PROBLEMS
WILL ALSO BE POSSIBLE. THE RISK OF STRONGER STORMS WILL END BY
MIDNIGHT.

A WEAKENING COLD FRONT WILL SLOWLY MOVE INTO THE FORECAST AREA
TONIGHT AND WILL DRIFT ACROSS THE AREA DURING THE DAY WEDNESDAY.

.DAYS TWO THROUGH SEVEN...WEDNESDAY NIGHT THROUGH MONDAY

THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW.

.SPOTTER CALL TO ACTION STATEMENT...
THE ACTIVATION OF STORM SPOTTERS...HAM RADIO OPERATORS...AND
EMERGENCY MANAGEMENT PERSONNEL IN SUPPORT OF SEVERE WEATHER
OPERATIONS IS NOT EXPECTED THROUGH NEXT MONDAY.

MSZ030-031-033-038-039-044>046-050>052-055>058-063>066-072>074-
052030-
CLAY-LOWNDES-OKTIBBEHA-WINSTON-NOXUBEE-LEAKE-NESHOBA-KEMPER-SCOTT-
NEWTON-LAUDERDALE-SIMPSON-SMITH-JASPER-CLARKE-LAWRENCE-
JEFFERSON DAVIS-COVINGTON-JONES-MARION-LAMAR-FORREST-
226 PM CST TUE DEC 4 2012

THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL MISSISSIPPI...
NORTHEAST LOUISIANA...AND EXTREME SOUTHEAST ARKANSAS.

.DAY ONE...TONIGHT AND WEDNESDAY

A FEW STRONG THUNDERSTORMS WILL BE POSSIBLE THIS AFTERNOON AND
EVENING. THEY WILL HAVE THE POTENTIAL FOR WIND GUSTS OF 40 MPH
AND SMALL HAIL ALONG WITH FREQUENT LIGHTNING STRIKES AND PERIODS OF
HEAVIER RAIN. THE RISK OF STRONG STORMS WILL END BY MIDNIGHT.

A WEAKENING COLD FRONT WILL SLOWLY MOVE INTO THE FORECAST AREA
TONIGHT AND WILL DRIFT ACROSS THE AREA DURING THE DAY WEDNESDAY.

.DAYS TWO THROUGH SEVEN...WEDNESDAY NIGHT THROUGH MONDAY

THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW.

.SPOTTER CALL TO ACTION STATEMENT...
THE ACTIVATION OF STORM SPOTTERS...HAM RADIO OPERATORS...AND
EMERGENCY MANAGEMENT PERSONNEL IN SUPPORT OF SEVERE WEATHER
OPERATIONS IS NOT EXPECTED THROUGH NEXT MONDAY.

FOR MORE INFORMATION PLEASE VISIT OUR WEBSITE AT
WWW.SRH.NOAA.GOV/JAN.

03

In the hours before

Special weather statement, Dec 4, 2:39 PM CST, 57 minutes before

MSZ026-042125-
GRENADA MS-
239 PM CST TUE DEC 4 2012

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE JACKSON MS
239 PM CST TUE DEC 4 2012

A STRONG THUNDERSTORM CAPABLE OF PRODUCING PEA TO DIME SIZE HAIL WAS
LOCATED OVER BEW SPRINGS AT 239 PM CST...MOVING NORTHEAST AT 30 MPH.

VERY HEAVY RAIN IS ALSO POSSIBLE WITH THIS STORM.

PEOPLE IN GRENADA COUNTY SHOULD MONITOR THIS STORM CLOSELY.

LAT...LON 3389 8976 3387 8976 3387 8951 3386 8950
      3374 8950 3370 8958 3369 9005 3381 8999
      3383 8995 3383 8994 3384 8993 3391 8979
TIME...MOT...LOC 2039Z 245DEG 26KT 3377 8985

Special weather statement, Dec 4, 3:02 PM CST, 34 minutes before

LAZ008-042145-
WEST CARROLL LA-
302 PM CST TUE DEC 4 2012

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE JACKSON MS
302 PM CST TUE DEC 4 2012

A STRONG THUNDERSTORM CAPABLE OF PRODUCING PEA TO DIME SIZE HAIL AND
30 TO 40 MPH WINDS WAS LOCATED 5 MILES SOUTH OF GOODWILL AT 302 PM
CST...MOVING NORTHEAST AT 25 MPH.

VERY HEAVY RAIN IS ALSO POSSIBLE WITH THIS STORM.

PEOPLE IN WEST CARROLL PARISH SHOULD MONITOR THIS STORM CLOSELY.

LAT...LON 3275 9160 3278 9160 3283 9157 3300 9126
      3296 9127 3294 9131 3288 9131 3284 9135
      3275 9134 3269 9138 3261 9159 3266 9159
      3267 9164 3269 9162 3271 9164
TIME...MOT...LOC 2102Z 242DEG 20KT 3272 9157

Special weather statement, Dec 4, 3:18 PM CST, 18 minutes before

ARZ075-MSZ034-042150-
CHICOT AR-WASHINGTON MS-
318 PM CST TUE DEC 4 2012

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE JACKSON MS
318 PM CST TUE DEC 4 2012

...STRONG STORM GETTING READY TO MOVE INTO SOUTHWESTERN WASHINGTON
COUNTY...

A STRONG THUNDERSTORM CAPABLE OF PRODUCING PENNY TO NICKEL SIZE HAIL
AND 45 MPH WIND GUSTS WAS LOCATED 7 MILES WEST OF GLEN ALLAN AT 318
PM CST...MOVING NORTHEAST AT 25 MPH.

VERY HEAVY RAIN ALONG WITH CONTINUOUS CLOUD TO GROUND LIGHTNING ARE
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 WASHINGTON AND SOUTHEASTERN CHICOT COUNTIES SHOULD
MONITOR THIS STORM CLOSELY.

LAT...LON 3329 9094 3310 9079 3310 9091 3304 9091
      3301 9097 3300 9117 3301 9126 3305 9130
TIME...MOT...LOC 2118Z 236DEG 21KT 3303 9115

BYB

Special weather statement, Dec 4, 3:20 PM CST, 16 minutes before

LAZ009-MSZ040-042205-
ISSAQUENA MS-EAST CARROLL LA-
320 PM CST TUE DEC 4 2012

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE JACKSON MS
320 PM CST TUE DEC 4 2012

A STRONG THUNDERSTORM CAPABLE OF PRODUCING PEA TO DIME SIZE HAIL AND
40 TO 50 MPH WINDS WAS LOCATED OVER SHELBURN AT 320 PM CST...MOVING
NORTHEAST AT 15 MPH.

VERY HEAVY RAIN IS ALSO POSSIBLE WITH THIS STORM.

PEOPLE IN NORTHWESTERN ISSAQUENA COUNTY...AND NORTHERN EAST CARROLL
PARISH SHOULD MONITOR THIS STORM CLOSELY.

LAT...LON 3286 9134 3288 9131 3294 9131 3296 9127
      3299 9127 3299 9126 3301 9127 3301 9091
      3293 9092 3277 9134 3284 9135
TIME...MOT...LOC 2120Z 244DEG 11KT 3291 9123

DHB

Special weather statement, Dec 4, 3:36 PM CST, 0 minutes before

MSZ019-025-035-042205-
SUNFLOWER MS-LEFLORE MS-HUMPHREYS MS-
336 PM CST TUE DEC 4 2012

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE JACKSON MS
336 PM CST TUE DEC 4 2012

A STRONG THUNDERSTORM CAPABLE OF PRODUCING PEA TO DIME SIZE HAIL AND
30 TO 40 MPH WINDS WAS LOCATED OVER INVERNESS AT 336 PM CST...MOVING
NORTHEAST AT 20 MPH.

VERY HEAVY RAIN IS ALSO POSSIBLE WITH THIS STORM.

PEOPLE IN NORTHWESTERN HUMPHREYS...SOUTHERN LEFLORE AND SOUTHERN
SUNFLOWER COUNTIES SHOULD MONITOR THIS STORM CLOSELY.

LAT...LON 3359 9029 3337 9017 3336 9018 3334 9022
      3337 9032 3335 9028 3334 9028 3332 9030
      3321 9063 3337 9072
TIME...MOT...LOC 2136Z 244DEG 16KT 3333 9058

The office that day

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

Issued	Product	Office	Counties	Lasted
Dec 4, 2:39 PM CST	Special Weather Statement	JAN	Grenada	46 min
Dec 4, 3:11 PM CST	Flash Flood Warning	JAN	Carroll, Grenada	103 min
Dec 4, 3:18 PM CST	Special Weather Statement	JAN	Washington	32 min
Dec 4, 3:20 PM CST	Special Weather Statement	JAN	Issaquena	45 min
Dec 4, 4:24 PM CST	Special Weather Statement	JAN	Carroll	46 min
Dec 4, 4:26 PM CST	Special Weather Statement	JAN	Washington	44 min
Dec 4, 3:02 PM CST	Special Weather Statement	JAN	West Carroll	43 min
Dec 4, 4:20 PM CST	Special Weather Statement	JAN	West Carroll	30 min

Nearby

Special Weather Statements in Mississippi, 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.